.hero-section {
    position: relative;
    width: 100%;
    background: #ffffff;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.hero-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    min-height: 500px;
}

/* 左侧文字区域 */
.hero-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 60px 40px 60px 60px;
    background: #f8f9fa;
}

.hero-title-main {
    font-size: 42px;
    font-weight: 700;
    color: #1A1A1A;
    line-height: 1.3;
    margin-bottom: 8px;
}

.hero-title-sub {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    line-height: 1.3;
    margin-bottom: 20px;
}

.hero-desc {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 30px;
}

.hero-tag {
    display: inline-block;
    background: #1A1A1A;
    color: #ffffff;
    font-size: 14px;
    font-weight: 500;
    padding: 12px 24px;
    border-radius: 4px;
    letter-spacing: 1px;
}

/* 右侧DearFlip区域 */
.hero-preview {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px;
    background: #ffffff;
}

.hero-preview-box {
    width: 100%;
    max-width: 400px;
    background: #f8f9fa;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.hero-preview-content {
    width: 100%;
    min-height: 350px;
    background: #ffffff;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .hero-main {
        grid-template-columns: 1fr;
    }
    
    .hero-content {
        padding: 40px 24px;
        text-align: center;
    }
    
    .hero-title-main {
        font-size: 32px;
    }
    
    .hero-title-sub {
        font-size: 28px;
    }
    
    .hero-preview {
        padding: 24px;
    }
    
    .hero-preview-box {
        max-width: 500px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .hero-content {
        padding: 32px 20px;
    }
    
    .hero-title-main {
        font-size: 28px;
    }
    
    .hero-title-sub {
        font-size: 24px;
    }
    
    .hero-desc {
        font-size: 14px;
    }
    
    .hero-tag {
        font-size: 12px;
        padding: 10px 16px;
    }
    
    .hero-preview {
        padding: 20px;
    }
    
    .hero-preview-content {
        min-height: 280px;
    }
}


/* ===== 6大核心卖点 ===== */
.section-features {
    background: #FFFFFF;
    padding: 50px 20px;
}

.features-container {
    max-width: 1200px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    background: #fff;
    border-radius: 16px;
    padding: 48px 32px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.08);
}

.feature-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    color: #ff2442;
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-title {
    font-size: 26px;
    font-weight: 600;
    color: #ff2442;
    margin-bottom: 12px;
}

.feature-desc {
    font-size: 18px;
    color: #4A4A4A;
    line-height: 1.6;
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .section-features {
        padding: 40px 24px;
    }

    .features-grid {
        gap: 24px;
    }

    .feature-card {
        padding: 36px 24px;
    }

    .feature-icon {
        width: 60px;
        height: 60px;
        margin-bottom: 20px;
    }

    .feature-title {
        font-size: 22px;
    }

    .feature-desc {
        font-size: 16px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .section-features {
        padding: 32px 20px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .feature-card {
        padding: 24px 20px;
        display: flex;
        align-items: center;
        text-align: left;
        gap: 16px;
    }

    .feature-icon {
        width: 48px;
        height: 48px;
        margin: 0;
        flex-shrink: 0;
    }
    
    .feature-text {
        flex: 1;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }

    .feature-title {
        font-size: 18px;
        margin-bottom: 4px;
        line-height: 1.4;
    }

    .feature-desc {
        font-size: 14px;
        line-height: 1.5;
        color: #666;
    }
}


/* ===== 无真题不考研 ===== */
.section-why {
    background: #fff;
    padding: 100px 20px;
}

.why-container {
    max-width: 1000px;
    margin: 0 auto;
}

.why-header {
    text-align: center;
    margin-bottom: 64px;
}

.why-title {
    font-size: 36px;
    font-weight: 600;
    color: #1A1A1A;
    margin-bottom: 12px;
}

.why-subtitle {
    font-size: 20px;
    color: #E85D4E;
    font-weight: 500;
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 48px;
}

.why-card {
    text-align: center;
}

/* 图片固定高度，确保对齐 */
.why-image {
    width: 100%;
    height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    overflow: hidden;
}

.why-image img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    display: block;
}

.why-content {
    padding: 0 16px;
}

.why-card-title {
    font-size: 24px;
    font-weight: 600;
    color: #1A1A1A;
    margin-bottom: 10px;
    line-height: 1.4;
}

.why-card-desc {
    font-size: 17px;
    color: #4A4A4A;
    line-height: 1.6;
}

/* ===== Pad端 ===== */
@media (max-width: 1024px) {
    .section-why {
        padding: 80px 24px;
    }

    .why-title {
        font-size: 30px;
    }

    .why-subtitle {
        font-size: 18px;
    }

    .why-grid {
        gap: 36px;
    }

    .why-image {
        height: 240px;
    }

    .why-card-title {
        font-size: 22px;
    }

    .why-card-desc {
        font-size: 16px;
    }
}

/* ===== 手机端 ===== */
@media (max-width: 768px) {
    .section-why {
        padding: 64px 20px;
    }

    .why-header {
        margin-bottom: 40px;
    }

    .why-title {
        font-size: 26px;
    }

    .why-subtitle {
        font-size: 16px;
    }

    .why-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .why-image {
        height: auto;
        max-height: none;
        margin-bottom: 20px;
        overflow: visible;
    }
    
    .why-image img {
        max-width: 100%;
        max-height: none;
        width: 100%;
        height: auto;
    }

    .why-card-title {
        font-size: 20px;
    }

    .why-card-desc {
        font-size: 15px;
    }
}


.details-table-section {
    max-width: 800px;
    margin: 0 auto;
    padding: 50px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.details-table-section .section-label {
    display: inline-block;
    background: #FFF0F2;
    color: #ff2442;
    font-size: 18px;
    font-weight: 600;
    padding: 10px 28px;
    border-radius: 24px;
    margin-bottom: 20px;
    letter-spacing: 1px;
    text-align: center;
    width: 100%;
    box-sizing: border-box;
}

.details-table {
    width: 100%;
    border-collapse: collapse;
    background: #ffffff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    border: 1px solid #f0f0f0;
}

.details-table tr {
    border-bottom: 1px solid #f0f0f0;
}

.details-table tr:last-child {
    border-bottom: none;
}

.details-table td {
    padding: 20px 24px;
    font-size: 16px;
    vertical-align: top;
}

.details-table td:first-child {
    width: 30%;
    font-weight: 600;
    color: #1A1A1A;
    background: #f8f9fa;
}

.details-table td:last-child {
    color: #4A4A4A;
    line-height: 1.6;
}

.details-table-note {
    text-align: center;
    margin-top: 24px;
    font-size: 14px;
    color: #999;
    font-style: italic;
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .details-table-section {
        padding: 40px 24px;
    }
    
    .details-table-section .section-label {
        font-size: 16px;
        padding: 8px 22px;
    }
    
    .details-table td {
        padding: 16px 20px;
        font-size: 15px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .details-table-section {
        padding: 32px 20px;
    }
    
    .details-table-section .section-label {
        font-size: 15px;
        padding: 8px 20px;
    }
    
    .details-table td {
        padding: 14px 16px;
        font-size: 14px;
    }
    
    .details-table td:first-child {
        width: 35%;
    }
}


.authenticity-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 50px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.authenticity-section .section-header {
    text-align: center;
    margin-bottom: 64px;
}

.authenticity-section .section-label {
    display: inline-block;
    background: #FFF0F2;
    color: #ff2442;
    font-size: 18px;
    font-weight: 600;
    padding: 10px 28px;
    border-radius: 24px;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.authenticity-section .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 20px;
    line-height: 1.3;
}

.authenticity-section .section-desc {
    font-size: 18px;
    color: #1A1A1A;
    line-height: 1.8;
    max-width: 680px;
    margin: 0 auto;
}

.authenticity-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.authenticity-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 48px;
    box-shadow: 0 2px 16px rgba(0,0,0,0.06);
    border: 1px solid #f0f0f0;
    transition: all 0.3s ease;
}

.authenticity-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
}

.authenticity-card .card-icon {
    width: 64px;
    height: 64px;
    background: #FFF0F2;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    margin-bottom: 24px;
}

.authenticity-card .card-number {
    font-size: 56px;
    font-weight: 800;
    color: #ff2442;
    line-height: 1;
    margin-bottom: 12px;
}

.authenticity-card .card-unit {
    font-size: 20px;
    color: #ff2442;
    font-weight: 600;
    margin-left: 4px;
}

.authenticity-card .card-title {
    font-size: 24px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 16px;
}

.authenticity-card .card-desc {
    font-size: 17px;
    color: #1A1A1A;
    line-height: 1.8;
}

/* ===== Pad端 ===== */
@media (max-width: 1024px) {
    .authenticity-section {
        padding: 50px 24px;
    }
    .authenticity-section .section-label {
        font-size: 16px;
        padding: 8px 22px;
    }
    .authenticity-section .section-title {
        font-size: 30px;
    }
    .authenticity-section .section-desc {
        font-size: 17px;
    }
    .authenticity-card {
        padding: 36px;
    }
    .authenticity-card .card-number {
        font-size: 48px;
    }
    .authenticity-card .card-title {
        font-size: 22px;
    }
    .authenticity-card .card-desc {
        font-size: 16px;
    }
}

/* ===== 手机端 ===== */
@media (max-width: 768px) {
    .authenticity-section {
        padding: 50px 20px;
    }
    .authenticity-section .section-header {
        margin-bottom: 40px;
    }
    .authenticity-section .section-label {
        font-size: 15px;
        padding: 8px 20px;
    }
    .authenticity-section .section-title {
        font-size: 26px;
    }
    .authenticity-section .section-desc {
        font-size: 16px;
    }
    .authenticity-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .authenticity-card {
        padding: 28px;
    }
    .authenticity-card .card-number {
        font-size: 44px;
    }
    .authenticity-card .card-title {
        font-size: 20px;
    }
    .authenticity-card .card-desc {
        font-size: 15px;
    }
}


.method-section {
    position: relative;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    overflow: hidden;
}

/* 背景图 */
.method-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('https://yiwang.online/wp-content/uploads/2026/04/A_top-down_cinematic_202604122141.jpg');
    background-size: cover;
    background-position: center;
    filter: brightness(0.25);
    z-index: 1;
}

/* 内容容器 */
.method-content {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 50px 20px;
}

.method-content .section-header {
    text-align: center;
    margin-bottom: 20px;
}

.method-content .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 20px;
    text-shadow: 0 2px 8px rgba(0,0,0,0.5);
}

.method-content .section-desc {
    font-size: 18px;
    color: rgba(255,255,255,0.9);
    line-height: 1.8;
    max-width: 720px;
    margin: 0 auto 64px;
    text-align: center;
}

/* 流程图容器 */
.method-flow {
    display: flex;
    align-items: stretch;
    gap: 0;
    margin-bottom: 56px;
}

.method-step {
    flex: 1;
    background: rgba(255, 255, 255, 0.95);
    padding: 36px 16px;
    text-align: center;
    position: relative;
    border-radius: 16px;
    margin: 0 6px;
    transition: all 0.6s ease;
    backdrop-filter: blur(10px);
}

/* 步骤编号 - 默认灰色 */
.step-number {
    width: 48px;
    height: 48px;
    background: #e0e0e0;
    color: #888;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    margin: 0 auto 16px;
    transition: all 0.6s ease;
}

/* 步骤标题 */
.step-title {
    font-size: 18px;
    font-weight: 700;
    color: #666;
    margin-bottom: 10px;
    transition: all 0.6s ease;
}

/* 步骤描述 */
.step-desc {
    font-size: 14px;
    color: #888;
    line-height: 1.6;
    transition: all 0.6s ease;
}

/* 连接线 */
.step-connector {
    width: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.4);
    font-size: 24px;
    flex-shrink: 0;
    transition: all 0.6s ease;
    position: relative;
}

/* 流动光效 - 箭头上的光点 */
.step-connector::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    background: #ff2442;
    border-radius: 50%;
    opacity: 0;
    transition: all 0.6s ease;
    box-shadow: 0 0 16px rgba(255, 36, 66, 0.8);
}

/* ========== 激活状态 ========== */

.method-step.active {
    background: #ffffff;
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.2);
}

.method-step.active .step-number {
    background: #ff2442;
    color: #ffffff;
    transform: scale(1.1);
    box-shadow: 0 4px 16px rgba(255, 36, 66, 0.4);
}

.method-step.active .step-title {
    color: #1A1A1A;
}

.method-step.active .step-desc {
    color: #4A4A4A;
}

/* 箭头激活 */
.step-connector.active {
    color: rgba(255,255,255,0.9);
    transform: scaleX(1.2);
}

.step-connector.active::after {
    opacity: 1;
    animation: flowLight 1.2s ease-in-out infinite;
}

@keyframes flowLight {
    0% {
        left: 20%;
        opacity: 0;
    }
    30% {
        opacity: 1;
    }
    70% {
        opacity: 1;
    }
    100% {
        left: 80%;
        opacity: 0;
    }
}

/* 底部强调文案 */
.method-footer {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,0.2);
    color: #ffffff;
    border-radius: 16px;
    padding: 36px 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    max-width: 800px;
    margin: 0 auto;
}

.method-footer .footer-text {
    font-size: 20px;
    font-weight: 600;
    line-height: 1.6;
}

.method-footer .footer-text span {
    color: #ff6b7a;
}

.method-footer .footer-icon {
    font-size: 48px;
    flex-shrink: 0;
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .method-content {
        padding: 50px 24px;
    }
    
    .method-content .section-title {
        font-size: 30px;
    }
    
    .method-content .section-desc {
        font-size: 17px;
        margin-bottom: 48px;
    }
    
    .method-step {
        padding: 28px 12px;
        margin: 0 4px;
    }
    
    .step-number {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    
    .step-title {
        font-size: 16px;
    }
    
    .step-desc {
        font-size: 13px;
    }
    
    .step-connector {
        width: 24px;
        font-size: 20px;
    }
    
    .method-footer {
        padding: 28px 36px;
    }
    
    .method-footer .footer-text {
        font-size: 18px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .method-content {
        padding: 50px 20px;
    }
    
    .method-content .section-title {
        font-size: 26px;
    }
    
    .method-content .section-desc {
        font-size: 16px;
        margin-bottom: 40px;
    }
    
    .method-flow {
        flex-direction: column;
        gap: 16px;
        margin-bottom: 40px;
    }
    
    .method-step {
        margin: 0;
        padding: 28px 24px;
        display: flex;
        align-items: center;
        gap: 20px;
        text-align: left;
    }
    
    .step-number {
        margin: 0;
        flex-shrink: 0;
    }
    
    .step-content {
        flex: 1;
    }
    
    .step-title {
        font-size: 18px;
        margin-bottom: 6px;
    }
    
    .step-desc {
        font-size: 14px;
    }
    
    .step-connector {
        display: none;
    }
    
    .method-footer {
        flex-direction: column;
        text-align: center;
        padding: 28px;
    }
    
    .method-footer .footer-text {
        font-size: 17px;
    }
}


.coverage-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 50px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.coverage-section .section-header {
    text-align: center;
    margin-bottom: 64px;
}

.coverage-section .section-label {
    display: inline-block;
    background: #FFF0F2;
    color: #ff2442;
    font-size: 18px;
    font-weight: 600;
    padding: 10px 28px;
    border-radius: 24px;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.coverage-section .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 20px;
}

.coverage-section .section-desc {
    font-size: 18px;
    color: #1A1A1A;
    line-height: 1.8;
    max-width: 680px;
    margin: 0 auto;
}

/* 核心数据展示 */
.coverage-stats {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 64px;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    padding: 32px 40px;
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    border: 1px solid #f0f0f0;
    min-width: 180px;
}

.stat-number {
    font-size: 56px;
    font-weight: 800;
    color: #ff2442;
    line-height: 1;
    margin-bottom: 8px;
}

.stat-unit {
    font-size: 20px;
    color: #ff2442;
    font-weight: 600;
}

.stat-label {
    font-size: 16px;
    color: #4A4A4A;
    margin-top: 8px;
}

/* 时间轴 */
.timeline-container {
    margin-bottom: 64px;
    padding: 0 20px;
}

.timeline-bar {
    position: relative;
    height: 60px;
    background: #f0f0f0;
    border-radius: 30px;
    overflow: hidden;
}

.timeline-fill {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 100%;
    background: linear-gradient(90deg, #ff2442 0%, #ff6b7a 100%);
    border-radius: 30px;
}

.timeline-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 16px;
    padding: 0 8px;
}

.timeline-label {
    font-size: 15px;
    color: #737373;
    font-weight: 500;
}

.timeline-label.highlight {
    color: #ff2442;
    font-weight: 700;
    font-size: 16px;
}

.timeline-badge {
    text-align: center;
    margin-top: 24px;
}

.timeline-badge span {
    display: inline-block;
    background: #1A1A1A;
    color: #ffffff;
    font-size: 15px;
    font-weight: 600;
    padding: 12px 28px;
    border-radius: 20px;
}

/* 年份滚动动效区域 */
.year-scroll-section {
    text-align: center;
    margin-bottom: 64px;
    padding: 40px 20px;
    background: linear-gradient(135deg, #FFF0F2 0%, #ffffff 50%, #FFF0F2 100%);
    border-radius: 20px;
    border: 2px solid #ff2442;
    position: relative;
    overflow: hidden;
}

.year-scroll-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,36,66,0.03) 0%, transparent 70%);
    animation: pulseGlow 4s ease-in-out infinite;
}

@keyframes pulseGlow {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 1; }
}

.year-scroll-label {
    font-size: 16px;
    color: #666;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.year-scroll-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    position: relative;
    z-index: 1;
}

.year-scroll-item {
    font-size: 64px;
    font-weight: 800;
    color: #ff2442;
    line-height: 1;
    font-variant-numeric: tabular-nums;
    min-width: 160px;
    text-align: center;
}

.year-scroll-divider {
    font-size: 48px;
    font-weight: 300;
    color: #ff2442;
    opacity: 0.6;
    animation: pulseDivider 2s ease-in-out infinite;
}

@keyframes pulseDivider {
    0%, 100% { opacity: 0.4; transform: scaleX(1); }
    50% { opacity: 0.8; transform: scaleX(1.2); }
}

.year-scroll-note {
    font-size: 18px;
    color: #1A1A1A;
    margin-top: 16px;
    font-weight: 500;
    position: relative;
    z-index: 1;
}

.year-scroll-note span {
    color: #ff2442;
    font-weight: 700;
}

/* 卖点卡片 */
.coverage-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.coverage-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 48px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    border: 1px solid #f0f0f0;
    transition: all 0.3s ease;
}

.coverage-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.1);
}

.coverage-card .card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.coverage-card .card-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    flex-shrink: 0;
}

.coverage-card .card-title-group {
    flex: 1;
}

.coverage-card .card-title {
    font-size: 24px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 6px;
}

.coverage-card .card-subtitle {
    font-size: 15px;
    color: #ff2442;
    font-weight: 500;
}

.coverage-card .card-desc {
    font-size: 17px;
    color: #1A1A1A;
    line-height: 1.8;
}

.coverage-card .card-features {
    margin-top: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.coverage-card .feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    color: #4A4A4A;
}

.coverage-card .feature-item::before {
    content: '✓';
    width: 22px;
    height: 22px;
    background: #FFF0F2;
    color: #ff2442;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .coverage-section {
        padding: 50px 24px;
    }
    
    .coverage-section .section-label {
        font-size: 16px;
        padding: 8px 22px;
    }
    
    .coverage-section .section-title {
        font-size: 30px;
    }
    
    .coverage-section .section-desc {
        font-size: 17px;
    }
    
    .coverage-stats {
        gap: 24px;
        margin-bottom: 48px;
    }
    
    .stat-item {
        min-width: 160px;
        padding: 28px 32px;
    }
    
    .stat-number {
        font-size: 48px;
    }
    
    .timeline-container {
        margin-bottom: 48px;
    }
    
    .year-scroll-section {
        margin-bottom: 48px;
        padding: 32px 16px;
    }
    
    .year-scroll-item {
        font-size: 48px;
        min-width: 120px;
    }
    
    .year-scroll-divider {
        font-size: 36px;
    }
    
    .coverage-cards {
        gap: 24px;
    }
    
    .coverage-card {
        padding: 36px;
    }
    
    .coverage-card .card-title {
        font-size: 22px;
    }
    
    .coverage-card .card-desc {
        font-size: 16px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .coverage-section {
        padding: 50px 20px;
    }
    
    .coverage-section .section-header {
        margin-bottom: 40px;
    }
    
    .coverage-section .section-label {
        font-size: 15px;
        padding: 8px 20px;
    }
    
    .coverage-section .section-title {
        font-size: 26px;
    }
    
    .coverage-section .section-desc {
        font-size: 16px;
    }
    
    .coverage-stats {
        gap: 16px;
        margin-bottom: 40px;
    }
    
    .stat-item {
        min-width: 140px;
        padding: 24px 28px;
    }
    
    .stat-number {
        font-size: 40px;
    }
    
    .stat-label {
        font-size: 14px;
    }
    
    .timeline-container {
        margin-bottom: 40px;
        padding: 0;
    }
    
    .timeline-bar {
        height: 48px;
    }
    
    .timeline-labels {
        display: flex;
        margin-top: 12px;
        padding: 0 4px;
    }
    
    .timeline-label {
        font-size: 13px;
    }
    
    .timeline-label.highlight {
        font-size: 14px;
    }
    
    .timeline-badge {
        margin-top: 16px;
    }
    
    .timeline-badge span {
        font-size: 14px;
        padding: 10px 20px;
    }
    
    .year-scroll-section {
        margin-bottom: 40px;
        padding: 28px 16px;
    }
    
    .year-scroll-item {
        font-size: 36px;
        min-width: 90px;
    }
    
    .year-scroll-divider {
        font-size: 28px;
    }
    
    .year-scroll-note {
        font-size: 15px;
    }
    
    .coverage-cards {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .coverage-card {
        padding: 28px;
    }
    
    .coverage-card .card-avatar {
        width: 52px;
        height: 52px;
        font-size: 24px;
    }
    
    .coverage-card .card-title {
        font-size: 20px;
    }
    
    .coverage-card .card-subtitle {
        font-size: 14px;
    }
    
    .coverage-card .card-desc {
        font-size: 15px;
    }
    
    .coverage-card .feature-item {
        font-size: 14px;
    }
}


.reference-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 50px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.reference-section .section-header {
    text-align: center;
    margin-bottom: 64px;
}

.reference-section .section-label {
    display: inline-block;
    background: #FFF0F2;
    color: #ff2442;
    font-size: 18px;
    font-weight: 600;
    padding: 10px 28px;
    border-radius: 24px;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.reference-section .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 16px;
}

.reference-section .section-subtitle {
    font-size: 20px;
    color: #4A4A4A;
}

/* 主内容区：左侧时间线 + 右侧封面图 */
.reference-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    margin-bottom: 64px;
}

/* 时间线 */
.timeline-wrapper {
    position: relative;
}

.timeline-line {
    position: absolute;
    left: 24px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: #e5e5e5;
    border-radius: 2px;
}

.timeline-line::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 0%;
    background: #ff2442;
    border-radius: 2px;
    animation: timelineGrow 3s ease forwards;
}

@keyframes timelineGrow {
    to { height: 100%; }
}

.timeline-item {
    position: relative;
    padding-left: 64px;
    padding-bottom: 36px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: 0;
    top: 4px;
    width: 52px;
    height: 52px;
    background: #ffffff;
    border: 3px solid #e5e5e5;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    z-index: 2;
    transition: all 0.4s ease;
}

.timeline-item.active .timeline-dot {
    border-color: #ff2442;
    background: #ff2442;
    color: #ffffff;
    transform: scale(1.1);
}

.timeline-phase {
    font-size: 14px;
    font-weight: 600;
    color: #ff2442;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.timeline-title {
    font-size: 22px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 10px;
}

.timeline-desc {
    font-size: 16px;
    color: #4A4A4A;
    line-height: 1.7;
}

/* 封面图 */
.cover-showcase {
    position: relative;
    text-align: center;
}

.cover-showcase img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
    transform: perspective(1000px) rotateY(-5deg);
    transition: all 0.5s ease;
    position: relative;
    z-index: 1;
}

.cover-showcase:hover img {
    transform: perspective(1000px) rotateY(0deg);
    box-shadow: 0 24px 70px rgba(0,0,0,0.2);
}

.cover-badge {
    position: absolute;
    top: -16px;
    right: 20px;
    background: #ff2442;
    color: #ffffff;
    font-size: 14px;
    font-weight: 700;
    padding: 10px 20px;
    border-radius: 20px;
    box-shadow: 0 4px 12px rgba(255, 36, 66, 0.3);
    animation: badgePulse 2s ease infinite;
    z-index: 10;
}

@keyframes badgePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* 底部4个使用场景 */
.usage-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.usage-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    border: 1px solid #f0f0f0;
    transition: all 0.3s ease;
}

.usage-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.usage-card .usage-icon {
    width: 60px;
    height: 60px;
    background: #FFF0F2;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin: 0 auto 20px;
}

.usage-card .usage-title {
    font-size: 18px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 10px;
}

.usage-card .usage-desc {
    font-size: 15px;
    color: #4A4A4A;
    line-height: 1.6;
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .reference-section {
        padding: 50px 24px;
    }
    
    .reference-section .section-label {
        font-size: 16px;
        padding: 8px 22px;
    }
    
    .reference-section .section-title {
        font-size: 30px;
    }
    
    .reference-section .section-subtitle {
        font-size: 18px;
    }
    
    .reference-main {
        gap: 40px;
        margin-bottom: 48px;
    }
    
    .timeline-title {
        font-size: 20px;
    }
    
    .timeline-desc {
        font-size: 15px;
    }
    
    .cover-showcase img {
        max-width: 320px;
    }
    
    .usage-grid {
        gap: 16px;
    }
    
    .usage-card {
        padding: 24px 16px;
    }
    
    .usage-card .usage-icon {
        width: 52px;
        height: 52px;
        font-size: 24px;
    }
    
    .usage-card .usage-title {
        font-size: 16px;
    }
    
    .usage-card .usage-desc {
        font-size: 14px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .reference-section {
        padding: 50px 20px;
    }
    
    .reference-section .section-header {
        margin-bottom: 40px;
    }
    
    .reference-section .section-label {
        font-size: 15px;
        padding: 8px 20px;
    }
    
    .reference-section .section-title {
        font-size: 26px;
    }
    
    .reference-section .section-subtitle {
        font-size: 16px;
    }
    
    .reference-main {
        grid-template-columns: 1fr;
        gap: 40px;
        margin-bottom: 40px;
    }
    
    .cover-showcase {
        order: -1;
        margin-bottom: 0;
    }
    
    .cover-showcase img {
        transform: none;
        max-width: 260px;
    }
    
    .cover-badge {
        font-size: 13px;
        padding: 8px 16px;
    }
    
    .timeline-item {
        padding-left: 56px;
        padding-bottom: 28px;
    }
    
    .timeline-dot {
        width: 44px;
        height: 44px;
        font-size: 18px;
    }
    
    .timeline-title {
        font-size: 18px;
    }
    
    .timeline-desc {
        font-size: 15px;
    }
    
    .usage-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    
    .usage-card {
        padding: 24px 16px;
    }
    
    .usage-card .usage-icon {
        width: 48px;
        height: 48px;
        font-size: 22px;
        margin-bottom: 16px;
    }
    
    .usage-card .usage-title {
        font-size: 16px;
    }
    
    .usage-card .usage-desc {
        font-size: 13px;
    }
}


.service-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 50px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.service-section .section-header {
    text-align: center;
    margin-bottom: 48px;
}

.service-section .section-label {
    display: inline-block;
    background: #FFF0F2;
    color: #ff2442;
    font-size: 18px;
    font-weight: 600;
    padding: 10px 28px;
    border-radius: 24px;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.service-section .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 16px;
}

.service-section .section-subtitle {
    font-size: 20px;
    color: #4A4A4A;
    margin-bottom: 40px;
}

/* 服务时间线 */
.service-timeline {
    max-width: 640px;
    margin: 0 auto 64px;
    padding: 32px 40px;
    background: #F7F7F7;
    border-radius: 16px;
}

.service-timeline-title {
    font-size: 18px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 28px;
    text-align: center;
}

.timeline-months {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    padding-bottom: 36px;
}

.timeline-months::before {
    content: '';
    position: absolute;
    top: 22px;
    left: 0;
    right: 0;
    height: 3px;
    background: #e5e5e5;
    border-radius: 2px;
}

.timeline-months::after {
    content: '';
    position: absolute;
    top: 22px;
    left: 0;
    width: 100%;
    height: 3px;
    background: #ff2442;
    border-radius: 2px;
    animation: serviceLineGrow 2s ease forwards;
}

@keyframes serviceLineGrow {
    from { width: 0; }
    to { width: 100%; }
}

.month-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 2;
}

.month-dot {
    width: 48px;
    height: 48px;
    background: #ffffff;
    border: 3px solid #ff2442;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    color: #ff2442;
    margin-bottom: 12px;
}

.month-label {
    font-size: 14px;
    color: #4A4A4A;
    font-weight: 500;
    position: absolute;
    top: 60px;
    white-space: nowrap;
}

/* 主内容区：左侧服务承诺 + 右侧截图 */
.service-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
}

/* 左侧：服务承诺 */
.service-promises {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.promise-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    border: 1px solid #f0f0f0;
    transition: all 0.3s ease;
}

.promise-card:hover {
    transform: translateX(4px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.promise-card .promise-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.promise-card .promise-icon {
    width: 56px;
    height: 56px;
    background: #FFF0F2;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    flex-shrink: 0;
}

.promise-card .promise-title {
    font-size: 20px;
    font-weight: 700;
    color: #1A1A1A;
}

.promise-card .promise-desc {
    font-size: 16px;
    color: #1A1A1A;
    line-height: 1.7;
    padding-left: 72px;
}

/* 右侧：答疑截图 */
.chat-showcase {
    position: relative;
}

.chat-frame {
    background: #ffffff;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.12);
    overflow: hidden;
    border: 1px solid #e5e5e5;
}

.chat-header {
    background: #f8f9fa;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid #e5e5e5;
}

.chat-avatar {
    width: 44px;
    height: 44px;
    background: #ff2442;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: #ffffff;
}

.chat-info {
    flex: 1;
}

.chat-name {
    font-size: 16px;
    font-weight: 700;
    color: #1A1A1A;
}

.chat-status {
    font-size: 13px;
    color: #27ae60;
    display: flex;
    align-items: center;
    gap: 4px;
}

.chat-status::before {
    content: '';
    width: 8px;
    height: 8px;
    background: #27ae60;
    border-radius: 50%;
}

.chat-body {
    padding: 20px;
    background: #f0f2f5;
    min-height: 300px;
}

.chat-screenshot {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.chat-input-bar {
    padding: 12px 20px;
    background: #ffffff;
    border-top: 1px solid #e5e5e5;
    display: flex;
    align-items: center;
    gap: 10px;
}

.chat-input-placeholder {
    flex: 1;
    height: 40px;
    background: #f0f2f5;
    border-radius: 20px;
    display: flex;
    align-items: center;
    padding: 0 16px;
    font-size: 14px;
    color: #999;
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .service-section {
        padding: 50px 24px;
    }
    
    .service-section .section-label {
        font-size: 16px;
        padding: 8px 22px;
    }
    
    .service-section .section-title {
        font-size: 30px;
    }
    
    .service-section .section-subtitle {
        font-size: 18px;
    }
    
    .service-timeline {
        padding: 28px 32px;
        margin-bottom: 48px;
    }
    
    .service-main {
        gap: 40px;
    }
    
    .promise-card {
        padding: 28px;
    }
    
    .promise-card .promise-icon {
        width: 48px;
        height: 48px;
        font-size: 24px;
    }
    
    .promise-card .promise-title {
        font-size: 18px;
    }
    
    .promise-card .promise-desc {
        font-size: 15px;
        padding-left: 64px;
    }
    
    .chat-frame {
        border-radius: 16px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .service-section {
        padding: 50px 20px;
    }
    
    .service-section .section-header {
        margin-bottom: 32px;
    }
    
    .service-section .section-label {
        font-size: 15px;
        padding: 8px 20px;
    }
    
    .service-section .section-title {
        font-size: 26px;
    }
    
    .service-section .section-subtitle {
        font-size: 16px;
        margin-bottom: 28px;
    }
    
    .service-timeline {
        padding: 24px 20px;
        margin-bottom: 40px;
    }
    
    .service-timeline-title {
        font-size: 16px;
        margin-bottom: 20px;
    }
    
    .timeline-months {
        padding-bottom: 28px;
    }
    
    .month-dot {
        width: 40px;
        height: 40px;
        font-size: 12px;
    }
    
    .month-label {
        font-size: 12px;
        top: 52px;
    }
    
    .service-main {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .chat-showcase {
        order: -1;
    }
    
    .promise-card {
        padding: 24px;
    }
    
    .promise-card .promise-header {
        margin-bottom: 12px;
    }
    
    .promise-card .promise-icon {
        width: 44px;
        height: 44px;
        font-size: 22px;
    }
    
    .promise-card .promise-title {
        font-size: 18px;
    }
    
    .promise-card .promise-desc {
        padding-left: 0;
        margin-top: 12px;
        font-size: 15px;
    }
}


.target-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 50px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.target-section .section-header {
    text-align: center;
    margin-bottom: 64px;
}

.target-section .section-label {
    display: inline-block;
    background: #FFF0F2;
    color: #ff2442;
    font-size: 18px;
    font-weight: 600;
    padding: 10px 28px;
    border-radius: 24px;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.target-section .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 16px;
}

.target-section .section-subtitle {
    font-size: 20px;
    color: #4A4A4A;
}

/* 主内容区 */
.target-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

/* 左侧：原图展示 + 专业说明 */
.pku-visual {
    text-align: center;
}

.pku-image-wrapper {
    margin-bottom: 40px;
}

.pku-image-wrapper img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

.pku-majors-title {
    font-size: 20px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 20px;
}

.majors-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    max-width: 440px;
    margin: 0 auto;
}

.major-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    background: #f8f9fa;
    border-radius: 12px;
    font-size: 16px;
    color: #1A1A1A;
    transition: all 0.3s ease;
}

.major-item:hover {
    background: #FFF0F2;
    color: #ff2442;
}

.major-item::before {
    content: '✓';
    width: 22px;
    height: 22px;
    background: #ff2442;
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

/* 右侧：资料封面展示 */
.material-showcase {
    text-align: center;
}

.material-cover {
    position: relative;
    display: inline-block;
    margin-bottom: 32px;
}

.material-cover img {
    max-width: 300px;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 16px 48px rgba(0,0,0,0.15);
    transition: all 0.5s ease;
}

.material-cover:hover img {
    box-shadow: 0 20px 56px rgba(0,0,0,0.2);
    transform: translateY(-4px);
}

.material-tag {
    position: absolute;
    top: -12px;
    right: -12px;
    background: #ff2442;
    color: #ffffff;
    font-size: 13px;
    font-weight: 700;
    padding: 10px 18px;
    border-radius: 20px;
    box-shadow: 0 4px 12px rgba(255, 36, 66, 0.3);
    z-index: 10;
}

.material-desc {
    padding: 28px;
    background: #f8f9fa;
    border-radius: 12px;
    text-align: left;
    max-width: 340px;
    margin: 0 auto;
}

.material-desc-title {
    font-size: 20px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 12px;
}

.material-desc-text {
    font-size: 18px;
    color: #1A1A1A;
    line-height: 1.7;
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .target-section {
        padding: 50px 24px;
    }
    
    .target-section .section-label {
        font-size: 16px;
        padding: 8px 22px;
    }
    
    .target-section .section-title {
        font-size: 30px;
    }
    
    .target-section .section-subtitle {
        font-size: 18px;
    }
    
    .target-main {
        gap: 40px;
    }
    
    .pku-image-wrapper {
        margin-bottom: 32px;
    }
    
    .pku-majors-title {
        font-size: 18px;
    }
    
    .majors-grid {
        gap: 12px;
    }
    
    .major-item {
        padding: 12px 14px;
        font-size: 15px;
    }
    
    .material-cover img {
        max-width: 260px;
    }
    
    .material-desc {
        padding: 24px;
    }
    
    .material-desc-title {
        font-size: 18px;
    }
    
    .material-desc-text {
        font-size: 16px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .target-section {
        padding: 50px 20px;
    }
    
    .target-section .section-header {
        margin-bottom: 40px;
    }
    
    .target-section .section-label {
        font-size: 15px;
        padding: 8px 20px;
    }
    
    .target-section .section-title {
        font-size: 26px;
    }
    
    .target-section .section-subtitle {
        font-size: 16px;
    }
    
    .target-main {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .pku-image-wrapper {
        margin-bottom: 28px;
    }
    
    .pku-majors-title {
        font-size: 17px;
    }
    
    .majors-grid {
        grid-template-columns: 1fr;
        max-width: 320px;
    }
    
    .major-item {
        padding: 12px 16px;
        font-size: 15px;
    }
    
    .material-cover {
        margin-bottom: 24px;
    }
    
    .material-cover img {
        max-width: 240px;
    }
    
    .material-tag {
        font-size: 12px;
        padding: 8px 14px;
    }
    
    .material-desc {
        padding: 20px;
    }
    
    .material-desc-title {
        font-size: 17px;
    }
    
    .material-desc-text {
        font-size: 15px;
    }
}


.why-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 50px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.why-section .section-header {
    text-align: center;
    margin-bottom: 64px;
}

.why-section .section-label {
    display: inline-block;
    background: #FFF0F2;
    color: #ff2442;
    font-size: 18px;
    font-weight: 600;
    padding: 10px 28px;
    border-radius: 24px;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.why-section .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 16px;
}

.why-section .section-subtitle {
    font-size: 20px;
    color: #4A4A4A;
}

.why-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 64px;
}

.why-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 40px 28px;
    text-align: center;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    border: 1px solid #f0f0f0;
    transition: all 0.3s ease;
}

.why-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.why-card .card-icon {
    width: 72px;
    height: 72px;
    background: #FFF0F2;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    margin: 0 auto 20px;
}

.why-card .card-title {
    font-size: 20px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 12px;
}

.why-card .card-desc {
    font-size: 16px;
    color: #4A4A4A;
    line-height: 1.7;
}

.service-promise {
    background: #f8f9fa;
    border-radius: 16px;
    padding: 48px;
    margin-bottom: 64px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.promise-content .promise-title {
    font-size: 28px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 20px;
}

.promise-content .promise-desc {
    font-size: 17px;
    color: #1A1A1A;
    line-height: 1.8;
    margin-bottom: 28px;
}

.promise-features {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.promise-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 16px;
    color: #1A1A1A;
}

.promise-feature::before {
    content: '✓';
    width: 26px;
    height: 26px;
    background: #ff2442;
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    flex-shrink: 0;
}

.promise-visual {
    text-align: center;
}

.promise-visual img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.course-section {
    margin-bottom: 24px;
}

.course-header {
    text-align: center;
    margin-bottom: 40px;
}

.course-header .course-label {
    display: inline-block;
    background: #e8f4fd;
    color: #1976d2;
    font-size: 18px;
    font-weight: 600;
    padding: 10px 28px;
    border-radius: 24px;
    margin-bottom: 16px;
}

.course-header .course-title {
    font-size: 32px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 12px;
}

.course-header .course-desc {
    font-size: 17px;
    color: #4A4A4A;
}

.course-total {
    display: inline-block;
    background: #FFF0F2;
    color: #ff2442;
    font-size: 18px;
    font-weight: 600;
    padding: 12px 28px;
    border-radius: 24px;
    margin-top: 16px;
}

.course-category {
    background: #ffffff;
    border-radius: 16px;
    margin-bottom: 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    border: 1px solid #f0f0f0;
    overflow: hidden;
}

.category-header {
    padding: 24px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #ffffff;
}

.category-header:hover {
    background: #f8f9fa;
}

.category-header.active {
    background: #e8f4fd;
}

.category-title-group {
    display: flex;
    align-items: center;
    gap: 16px;
}

.category-icon {
    width: 48px;
    height: 48px;
    background: #FFF0F2;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
}

.category-header.active .category-icon {
    background: #1976d2;
}

.category-info {
    flex: 1;
}

.category-name {
    font-size: 18px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 4px;
}

.category-meta {
    font-size: 14px;
    color: #737373;
}

.category-toggle {
    width: 36px;
    height: 36px;
    background: #f0f0f0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: #666;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.category-header.active .category-toggle {
    background: #1976d2;
    color: #ffffff;
    transform: rotate(180deg);
}

.category-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.category-content.open {
    max-height: 3000px;
    padding-top: 8px;
}

.course-list {
    padding: 0 28px 24px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.course-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    background: #f8f9fa;
    border-radius: 10px;
    font-size: 14px;
    color: #1A1A1A;
    transition: all 0.3s ease;
}

.course-item:hover {
    background: #e8f4fd;
    color: #1976d2;
}

.course-item .course-num {
    width: 28px;
    height: 28px;
    background: #e5e5e5;
    color: #666;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

.course-item:hover .course-num {
    background: #1976d2;
    color: #ffffff;
}

.course-footer {
    text-align: center;
    margin-top: 16px;
}

.course-btn {
    display: inline-block;
    background: #1976d2;
    color: #ffffff;
    font-size: 16px;
    font-weight: 600;
    padding: 16px 48px;
    border-radius: 50px;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px rgba(25, 118, 210, 0.3);
}

.course-btn:hover {
    background: #1565c0;
    color: #ffffff;
    transform: translateY(-2px);
}

.preview-section-simple {
    text-align: center;
    padding: 24px 20px 0px;
    max-width: 1200px;
    margin: 0 auto;
}

.preview-section-simple .preview-title {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 20px;
}

.preview-section-simple .preview-desc {
    font-size: 18px;
    color: #4A4A4A;
    line-height: 1.8;
    margin-bottom: 0px;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

@media (max-width: 1024px) {
    .why-section { padding: 50px 24px; }
    .why-section .section-label { font-size: 16px; padding: 8px 22px; }
    .why-section .section-title { font-size: 30px; }
    .why-section .section-subtitle { font-size: 18px; }
    .why-cards { gap: 24px; margin-bottom: 48px; }
    .why-card { padding: 32px 20px; }
    .why-card .card-icon { width: 60px; height: 60px; font-size: 28px; }
    .why-card .card-title { font-size: 18px; }
    .why-card .card-desc { font-size: 15px; }
    .service-promise { padding: 36px; gap: 36px; margin-bottom: 48px; }
    .promise-content .promise-title { font-size: 24px; }
    .promise-content .promise-desc { font-size: 16px; }
    .promise-feature { font-size: 15px; }
    .course-section { margin-bottom: 20px; }
    .course-header { margin-bottom: 32px; }
    .course-header .course-label { font-size: 16px; padding: 8px 22px; }
    .course-header .course-title { font-size: 28px; }
    .course-header .course-desc { font-size: 16px; }
    .course-total { font-size: 16px; padding: 10px 22px; }
    .category-header { padding: 20px 24px; }
    .category-name { font-size: 17px; }
    .course-list { padding: 0 24px 20px; gap: 10px; }
    .course-item { padding: 12px 14px; font-size: 13px; }
    .course-footer { margin-top: 16px; }
    .preview-section-simple { padding: 20px 24px 0px; }
    .preview-section-simple .preview-title { font-size: 30px; }
    .preview-section-simple .preview-desc { font-size: 17px; }
}

@media (max-width: 768px) {
    .why-section { padding: 50px 20px; }
    .why-section .section-header { margin-bottom: 40px; }
    .why-section .section-label { font-size: 15px; padding: 8px 20px; }
    .why-section .section-title { font-size: 26px; }
    .why-section .section-subtitle { font-size: 16px; }
    .why-cards { grid-template-columns: 1fr; gap: 20px; margin-bottom: 40px; }
    .why-card { padding: 28px 24px; }
    .why-card .card-icon { width: 56px; height: 56px; font-size: 26px; margin-bottom: 16px; }
    .why-card .card-title { font-size: 18px; }
    .why-card .card-desc { font-size: 15px; }
    .service-promise { grid-template-columns: 1fr; padding: 28px; margin-bottom: 40px; }
    .promise-content .promise-title { font-size: 22px; }
    .promise-content .promise-desc { font-size: 15px; margin-bottom: 20px; }
    .promise-features { gap: 12px; }
    .promise-feature { font-size: 15px; }
    .course-section { margin-bottom: 16px; }
    .course-header { margin-bottom: 24px; }
    .course-header .course-label { font-size: 15px; padding: 8px 20px; }
    .course-header .course-title { font-size: 24px; }
    .course-header .course-desc { font-size: 15px; }
    .course-total { font-size: 15px; padding: 8px 20px; }
    .category-header { padding: 18px 20px; }
    .category-icon { width: 40px; height: 40px; font-size: 20px; }
    .category-name { font-size: 16px; }
    .category-meta { font-size: 13px; }
    .course-list { grid-template-columns: 1fr; padding: 0 20px 20px; }
    .course-item { padding: 12px 14px; }
    .course-footer { margin-top: 12px; }
    .course-btn { padding: 14px 36px; font-size: 15px; }
    .preview-section-simple { padding: 16px 20px 0px; }
    .preview-section-simple .preview-title { font-size: 26px; }
    .preview-section-simple .preview-desc { font-size: 16px; margin-bottom: 0px; }
}


.testimonials-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 50px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.testimonials-section .section-title {
    text-align: center;
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 16px;
}

.testimonials-section .section-subtitle {
    text-align: center;
    font-size: 20px;
    color: #4A4A4A;
    margin-bottom: 64px;
}

.testimonial-carousel {
    position: relative;
    overflow: hidden;
}

.testimonial-track {
    display: flex;
    transition: transform 0.5s ease;
    gap: 24px;
}

.testimonial-card {
    min-width: calc(33.333% - 16px);
    background: #ffffff;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    border: 1px solid #f5f5f5;
    transition: all 0.3s ease;
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.1);
}

.testimonial-card .quote-icon {
    font-size: 56px;
    color: #ff2442;
    opacity: 0.2;
    line-height: 1;
    margin-bottom: 8px;
}

.testimonial-card .quote-text {
    font-size: 17px;
    line-height: 1.8;
    color: #1A1A1A;
    margin-bottom: 28px;
    font-style: italic;
}

.testimonial-card .author-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.testimonial-card .author-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 700;
    color: #ffffff;
    flex-shrink: 0;
    border: 3px solid #ffffff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.testimonial-card .author-name {
    font-size: 18px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 4px;
}

.testimonial-card .author-tag {
    font-size: 14px;
    color: #ff2442;
    font-weight: 500;
}

/* 轮播控制 */
.carousel-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 24px;
    margin-top: 40px;
}

.carousel-arrow {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: #ffffff;
    border: 1px solid #e5e5e5;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: #ff2442;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    user-select: none;
}

.carousel-arrow:hover {
    background: #ff2442;
    color: #ffffff;
    border-color: #ff2442;
}

.carousel-dots {
    display: flex;
    gap: 10px;
}

.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #ddd;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    padding: 0;
}

.carousel-dot.active {
    background: #ff2442;
    transform: scale(1.2);
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .testimonials-section {
        padding: 50px 24px;
    }
    
    .testimonials-section .section-title {
        font-size: 30px;
    }
    
    .testimonials-section .section-subtitle {
        font-size: 18px;
        margin-bottom: 48px;
    }
    
    .testimonial-card {
        min-width: calc(50% - 12px);
        padding: 32px;
    }
    
    .testimonial-card .quote-icon {
        font-size: 48px;
    }
    
    .testimonial-card .quote-text {
        font-size: 16px;
    }
    
    .testimonial-card .author-avatar {
        width: 52px;
        height: 52px;
    }
    
    .testimonial-card .author-name {
        font-size: 16px;
    }
    
    .carousel-controls {
        margin-top: 32px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .testimonials-section {
        padding: 50px 20px;
    }
    
    .testimonials-section .section-title {
        font-size: 26px;
    }
    
    .testimonials-section .section-subtitle {
        font-size: 16px;
        margin-bottom: 40px;
    }
    
    .testimonial-card {
        min-width: 100%;
        padding: 28px;
    }
    
    .testimonial-card .quote-icon {
        font-size: 44px;
    }
    
    .testimonial-card .quote-text {
        font-size: 15px;
        margin-bottom: 20px;
    }
    
    .testimonial-card .author-avatar {
        width: 48px;
        height: 48px;
        font-size: 20px;
    }
    
    .testimonial-card .author-name {
        font-size: 16px;
    }
    
    .testimonial-card .author-tag {
        font-size: 13px;
    }
    
    .carousel-controls {
        margin-top: 28px;
        gap: 16px;
    }
    
    .carousel-arrow {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
}


.compare-section {
    max-width: 1000px;
    margin: 0 auto;
    padding: 50px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.compare-section .section-header {
    text-align: center;
    margin-bottom: 64px;
}

.compare-section .section-label {
    display: inline-block;
    background: #FFF0F2;
    color: #ff2442;
    font-size: 18px;
    font-weight: 600;
    padding: 10px 28px;
    border-radius: 24px;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.compare-section .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 16px;
}

.compare-section .section-subtitle {
    font-size: 20px;
    color: #4A4A4A;
}

/* 对比表格 */
.compare-table {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 0;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

/* 表头 */
.compare-header {
    padding: 28px 24px;
    font-size: 18px;
    font-weight: 700;
    text-align: left;
}

.compare-header.feature {
    background: #f8f9fa;
    color: #4A4A4A;
}

.compare-header.yiwang {
    background: #ff2442;
    color: #ffffff;
    position: relative;
}

.compare-header.yiwang::after {
    content: '推荐';
    position: absolute;
    top: 8px;
    right: 8px;
    background: #ff6b7a;
    color: #ffffff;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 10px;
}

.compare-header.other {
    background: #e5e5e5;
    color: #999;
}

/* 对比行 */
.compare-row {
    display: contents;
}

.compare-cell {
    padding: 22px 24px;
    font-size: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.compare-cell.feature {
    background: #ffffff;
    color: #1A1A1A;
    font-weight: 600;
    border-bottom: 1px solid #f0f0f0;
}

.compare-cell.yiwang {
    background: #FFF0F2;
    color: #1A1A1A;
    font-weight: 600;
    border-bottom: 1px solid #ffe0e0;
}

.compare-cell.other {
    background: #fafafa;
    color: #999;
    border-bottom: 1px solid #f0f0f0;
}

/* 图标 */
.icon-check {
    width: 26px;
    height: 26px;
    background: #ff2442;
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
}

.icon-cross {
    width: 26px;
    height: 26px;
    background: #e5e5e5;
    color: #bbb;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
}

/* 底部CTA */
.compare-footer {
    text-align: center;
    margin-top: 48px;
}

.compare-footer-text {
    font-size: 20px;
    color: #4A4A4A;
    margin-bottom: 24px;
}

.compare-btn {
    display: inline-block;
    background: #ff2442;
    color: #ffffff;
    font-size: 16px;
    font-weight: 600;
    padding: 16px 48px;
    border-radius: 50px;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(255, 36, 66, 0.4);
}

.compare-btn:hover {
    background: #e01a36;
    color: #ffffff;
    transform: translateY(-2px);
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .compare-section {
        padding: 50px 24px;
    }
    
    .compare-section .section-label {
        font-size: 16px;
        padding: 8px 22px;
    }
    
    .compare-section .section-title {
        font-size: 30px;
    }
    
    .compare-section .section-subtitle {
        font-size: 18px;
    }
    
    .compare-header {
        padding: 24px 20px;
        font-size: 16px;
    }
    
    .compare-cell {
        padding: 18px 20px;
        font-size: 15px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .compare-section {
        padding: 50px 20px;
    }
    
    .compare-section .section-header {
        margin-bottom: 40px;
    }
    
    .compare-section .section-label {
        font-size: 15px;
        padding: 8px 20px;
    }
    
    .compare-section .section-title {
        font-size: 26px;
    }
    
    .compare-section .section-subtitle {
        font-size: 16px;
    }
    
    .compare-table {
        grid-template-columns: 1fr 1fr;
    }
    
    .compare-header.feature,
    .compare-cell.feature {
        display: none;
    }
    
    .compare-header {
        padding: 20px 16px;
        font-size: 15px;
    }
    
    .compare-cell {
        padding: 16px;
        font-size: 14px;
    }
    
    .compare-footer {
        margin-top: 32px;
    }
    
    .compare-footer-text {
        font-size: 17px;
    }
    
    .compare-btn {
        padding: 14px 36px;
        font-size: 15px;
    }
}


.details-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 50px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.details-section .section-header {
    text-align: center;
    margin-bottom: 64px;
}

.details-section .section-label {
    display: inline-block;
    background: #FFF0F2;
    color: #ff2442;
    font-size: 18px;
    font-weight: 600;
    padding: 10px 28px;
    border-radius: 24px;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.details-section .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 16px;
}

.details-section .section-subtitle {
    font-size: 20px;
    color: #4A4A4A;
}

/* 大图展示区 */
.details-showcase {
    margin-bottom: 64px;
}

.showcase-main {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 12px 40px rgba(0,0,0,0.15);
    margin-bottom: 20px;
}

.showcase-main img {
    width: 100%;
    height: auto;
    display: block;
}

.showcase-tag {
    position: absolute;
    bottom: 24px;
    left: 24px;
    background: rgba(255, 36, 66, 0.95);
    color: #ffffff;
    font-size: 15px;
    font-weight: 600;
    padding: 12px 24px;
    border-radius: 8px;
    backdrop-filter: blur(4px);
}

/* 缩略图网格 */
.showcase-thumbs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.thumb-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    cursor: pointer;
    transition: all 0.3s ease;
    border: 3px solid transparent;
}

.thumb-item:hover,
.thumb-item.active {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    border-color: #ff2442;
}

.thumb-item img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    display: block;
}

.thumb-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0,0,0,0.7);
    color: #ffffff;
    font-size: 14px;
    font-weight: 500;
    padding: 10px 14px;
    text-align: center;
}

/* 卖点说明 */
.details-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-bottom: 64px;
}

.detail-feature {
    text-align: center;
    padding: 40px 28px;
    background: #f8f9fa;
    border-radius: 16px;
    transition: all 0.3s ease;
}

.detail-feature:hover {
    background: #FFF0F2;
    transform: translateY(-4px);
}

.detail-feature .feature-icon {
    width: 64px;
    height: 64px;
    background: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    margin: 0 auto 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.detail-feature .feature-title {
    font-size: 20px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 12px;
}

.detail-feature .feature-desc {
    font-size: 16px;
    color: #4A4A4A;
    line-height: 1.7;
}

/* 大小和厚度展示 */
.size-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
    margin-bottom: 64px;
}

.size-item-large {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0,0,0,0.12);
}

.size-item-large img {
    width: 100%;
    height: auto;
    display: block;
}

.size-item-large .size-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    padding: 48px 28px 28px;
    color: #ffffff;
}

.size-item-large .size-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 10px;
}

.size-item-large .size-desc {
    font-size: 16px;
    opacity: 0.9;
}

/* 规格参数 */
.specs-bar {
    display: flex;
    justify-content: center;
    gap: 64px;
    padding: 40px;
    background: #1A1A1A;
    border-radius: 16px;
    color: #ffffff;
}

.spec-item {
    text-align: center;
}

.spec-number {
    font-size: 40px;
    font-weight: 800;
    color: #ff2442;
    line-height: 1;
    margin-bottom: 10px;
}

.spec-label {
    font-size: 16px;
    opacity: 0.8;
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .details-section {
        padding: 50px 24px;
    }
    
    .details-section .section-label {
        font-size: 16px;
        padding: 8px 22px;
    }
    
    .details-section .section-title {
        font-size: 30px;
    }
    
    .details-section .section-subtitle {
        font-size: 18px;
    }
    
    .details-showcase {
        margin-bottom: 48px;
    }
    
    .thumb-item img {
        height: 160px;
    }
    
    .details-features {
        gap: 20px;
        margin-bottom: 48px;
    }
    
    .detail-feature {
        padding: 32px 20px;
    }
    
    .detail-feature .feature-icon {
        width: 56px;
        height: 56px;
        font-size: 26px;
    }
    
    .detail-feature .feature-title {
        font-size: 18px;
    }
    
    .detail-feature .feature-desc {
        font-size: 15px;
    }
    
    .size-showcase {
        gap: 20px;
        margin-bottom: 48px;
    }
    
    .size-item-large .size-title {
        font-size: 20px;
    }
    
    .size-item-large .size-desc {
        font-size: 15px;
    }
    
    .specs-bar {
        gap: 48px;
        padding: 32px;
    }
    
    .spec-number {
        font-size: 36px;
    }
    
    .spec-label {
        font-size: 15px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .details-section {
        padding: 50px 20px;
    }
    
    .details-section .section-header {
        margin-bottom: 40px;
    }
    
    .details-section .section-label {
        font-size: 15px;
        padding: 8px 20px;
    }
    
    .details-section .section-title {
        font-size: 26px;
    }
    
    .details-section .section-subtitle {
        font-size: 16px;
    }
    
    .details-showcase {
        margin-bottom: 40px;
    }
    
    .showcase-tag {
        font-size: 13px;
        padding: 10px 16px;
        bottom: 16px;
        left: 16px;
    }
    
    .showcase-thumbs {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .thumb-item img {
        height: 200px;
    }
    
    .thumb-label {
        font-size: 13px;
        padding: 8px 12px;
    }
    
    .details-features {
        grid-template-columns: 1fr;
        gap: 16px;
        margin-bottom: 40px;
    }
    
    .detail-feature {
        padding: 28px 24px;
    }
    
    .detail-feature .feature-icon {
        width: 52px;
        height: 52px;
        font-size: 24px;
        margin-bottom: 16px;
    }
    
    .detail-feature .feature-title {
        font-size: 18px;
    }
    
    .detail-feature .feature-desc {
        font-size: 15px;
    }
    
    .size-showcase {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-bottom: 40px;
    }
    
    .size-item-large .size-overlay {
        padding: 36px 20px 20px;
    }
    
    .size-item-large .size-title {
        font-size: 18px;
    }
    
    .size-item-large .size-desc {
        font-size: 14px;
    }
    
    .specs-bar {
        flex-wrap: wrap;
        gap: 32px;
        padding: 28px;
    }
    
    .spec-number {
        font-size: 32px;
    }
    
    .spec-label {
        font-size: 14px;
    }
}


.cta-final {
    background: #f8f9fa;
    padding: 80px 20px;
    text-align: center;
}

.cta-box {
    max-width: 560px;
    margin: 0 auto;
}

.cta-box h2 {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 16px;
}

.cta-box > p {
    font-size: 18px;
    color: #4A4A4A;
    margin-bottom: 32px;
    line-height: 1.6;
}

.price-row {
    margin-bottom: 36px;
}

.price {
    font-size: 48px;
    font-weight: 800;
    color: #ff2442;
    margin-right: 16px;
    line-height: 1;
}

.note {
    font-size: 16px;
    color: #737373;
}

.buy-links {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.buy-links a {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.buy-links a:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    color: #ffffff;
}

.link-taobao {
    background: #ff5000;
    color: #fff;
}

.link-xhs {
    background: #ff2442;
    color: #fff;
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .cta-final {
        padding: 64px 24px;
    }
    
    .cta-box h2 {
        font-size: 30px;
    }
    
    .cta-box > p {
        font-size: 17px;
    }
    
    .price {
        font-size: 40px;
    }
    
    .note {
        font-size: 15px;
    }
    
    .buy-links a {
        padding: 14px 28px;
        font-size: 15px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .cta-final {
        padding: 48px 20px;
    }
    
    .cta-box h2 {
        font-size: 26px;
        margin-bottom: 12px;
    }
    
    .cta-box > p {
        font-size: 16px;
        margin-bottom: 24px;
    }
    
    .price-row {
        margin-bottom: 28px;
    }
    
    .price {
        font-size: 36px;
    }
    
    .note {
        font-size: 14px;
        display: block;
        margin-top: 8px;
    }
    
    .buy-links {
        flex-direction: column;
        gap: 12px;
    }
    
    .buy-links a {
        justify-content: center;
        padding: 14px 24px;
    }
}


.floating-buy-btn {
    position: fixed;
    bottom: 120px;
    right: 30px;
    z-index: 9999;
    display: flex;
    align-items: center;
    gap: 8px;
    background: #ff2442;
    color: #ffffff;
    font-size: 16px;
    font-weight: 600;
    padding: 16px 28px;
    border-radius: 50px;
    text-decoration: none;
    box-shadow: 0 4px 20px rgba(255, 36, 66, 0.4);
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.floating-buy-btn:hover {
    background: #e01a36;
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(255, 36, 66, 0.5);
    color: #ffffff;
}

.floating-buy-btn svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .floating-buy-btn {
        bottom: 20px;
        right: 20px;
        padding: 14px 24px;
        font-size: 15px;
    }
    
    .floating-buy-btn svg {
        width: 18px;
        height: 18px;
    }
}


.hero-section {
    position: relative;
    width: 100%;
    background: #ffffff;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.hero-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    min-height: 500px;
}

/* 左侧文字区域 */
.hero-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 60px 40px 60px 60px;
    background: #f8f9fa;
}

.hero-title-main {
    font-size: 42px;
    font-weight: 700;
    color: #1A1A1A;
    line-height: 1.3;
    margin-bottom: 8px;
}

.hero-title-sub {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    line-height: 1.3;
    margin-bottom: 20px;
}

.hero-desc {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 30px;
}

.hero-tag {
    display: inline-block;
    background: #1A1A1A;
    color: #ffffff;
    font-size: 14px;
    font-weight: 500;
    padding: 12px 24px;
    border-radius: 4px;
    letter-spacing: 1px;
}

/* 右侧DearFlip区域 */
.hero-preview {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px;
    background: #ffffff;
}

.hero-preview-box {
    width: 100%;
    max-width: 400px;
    background: #f8f9fa;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.hero-preview-content {
    width: 100%;
    min-height: 350px;
    background: #ffffff;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .hero-main {
        grid-template-columns: 1fr;
    }
    
    .hero-content {
        padding: 40px 24px;
        text-align: center;
    }
    
    .hero-title-main {
        font-size: 32px;
    }
    
    .hero-title-sub {
        font-size: 28px;
    }
    
    .hero-preview {
        padding: 24px;
    }
    
    .hero-preview-box {
        max-width: 500px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .hero-content {
        padding: 32px 20px;
    }
    
    .hero-title-main {
        font-size: 28px;
    }
    
    .hero-title-sub {
        font-size: 24px;
    }
    
    .hero-desc {
        font-size: 14px;
    }
    
    .hero-tag {
        font-size: 12px;
        padding: 10px 16px;
    }
    
    .hero-preview {
        padding: 20px;
    }
    
    .hero-preview-content {
        min-height: 280px;
    }
}


/* ===== 6大核心卖点 ===== */
.section-features {
    background: #FFFFFF;
    padding: 50px 20px;
}

.features-container {
    max-width: 1200px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    background: #fff;
    border-radius: 16px;
    padding: 48px 32px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.08);
}

.feature-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    color: #ff2442;
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-title {
    font-size: 26px;
    font-weight: 600;
    color: #ff2442;
    margin-bottom: 12px;
}

.feature-desc {
    font-size: 18px;
    color: #4A4A4A;
    line-height: 1.6;
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .section-features {
        padding: 40px 24px;
    }

    .features-grid {
        gap: 24px;
    }

    .feature-card {
        padding: 36px 24px;
    }

    .feature-icon {
        width: 60px;
        height: 60px;
        margin-bottom: 20px;
    }

    .feature-title {
        font-size: 22px;
    }

    .feature-desc {
        font-size: 16px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .section-features {
        padding: 32px 20px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .feature-card {
        padding: 24px 20px;
        display: flex;
        align-items: center;
        text-align: left;
        gap: 16px;
    }

    .feature-icon {
        width: 48px;
        height: 48px;
        margin: 0;
        flex-shrink: 0;
    }
    
    .feature-text {
        flex: 1;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }

    .feature-title {
        font-size: 18px;
        margin-bottom: 4px;
        line-height: 1.4;
    }

    .feature-desc {
        font-size: 14px;
        line-height: 1.5;
        color: #666;
    }
}


/* ===== 无真题不考研 ===== */
.section-why {
    background: #fff;
    padding: 100px 20px;
}

.why-container {
    max-width: 1000px;
    margin: 0 auto;
}

.why-header {
    text-align: center;
    margin-bottom: 64px;
}

.why-title {
    font-size: 36px;
    font-weight: 600;
    color: #1A1A1A;
    margin-bottom: 12px;
}

.why-subtitle {
    font-size: 20px;
    color: #E85D4E;
    font-weight: 500;
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 48px;
}

.why-card {
    text-align: center;
}

/* 图片固定高度，确保对齐 */
.why-image {
    width: 100%;
    height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    overflow: hidden;
}

.why-image img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    display: block;
}

.why-content {
    padding: 0 16px;
}

.why-card-title {
    font-size: 24px;
    font-weight: 600;
    color: #1A1A1A;
    margin-bottom: 10px;
    line-height: 1.4;
}

.why-card-desc {
    font-size: 17px;
    color: #4A4A4A;
    line-height: 1.6;
}

/* ===== Pad端 ===== */
@media (max-width: 1024px) {
    .section-why {
        padding: 80px 24px;
    }

    .why-title {
        font-size: 30px;
    }

    .why-subtitle {
        font-size: 18px;
    }

    .why-grid {
        gap: 36px;
    }

    .why-image {
        height: 240px;
    }

    .why-card-title {
        font-size: 22px;
    }

    .why-card-desc {
        font-size: 16px;
    }
}

/* ===== 手机端 ===== */
@media (max-width: 768px) {
    .section-why {
        padding: 64px 20px;
    }

    .why-header {
        margin-bottom: 40px;
    }

    .why-title {
        font-size: 26px;
    }

    .why-subtitle {
        font-size: 16px;
    }

    .why-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .why-image {
        height: auto;
        max-height: none;
        margin-bottom: 20px;
        overflow: visible;
    }
    
    .why-image img {
        max-width: 100%;
        max-height: none;
        width: 100%;
        height: auto;
    }

    .why-card-title {
        font-size: 20px;
    }

    .why-card-desc {
        font-size: 15px;
    }
}


.details-table-section {
    max-width: 800px;
    margin: 0 auto;
    padding: 50px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.details-table-section .section-label {
    display: inline-block;
    background: #FFF0F2;
    color: #ff2442;
    font-size: 18px;
    font-weight: 600;
    padding: 10px 28px;
    border-radius: 24px;
    margin-bottom: 20px;
    letter-spacing: 1px;
    text-align: center;
    width: 100%;
    box-sizing: border-box;
}

.details-table {
    width: 100%;
    border-collapse: collapse;
    background: #ffffff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    border: 1px solid #f0f0f0;
}

.details-table tr {
    border-bottom: 1px solid #f0f0f0;
}

.details-table tr:last-child {
    border-bottom: none;
}

.details-table td {
    padding: 20px 24px;
    font-size: 16px;
    vertical-align: top;
}

.details-table td:first-child {
    width: 30%;
    font-weight: 600;
    color: #1A1A1A;
    background: #f8f9fa;
}

.details-table td:last-child {
    color: #4A4A4A;
    line-height: 1.6;
}

.details-table-note {
    text-align: center;
    margin-top: 24px;
    font-size: 14px;
    color: #999;
    font-style: italic;
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .details-table-section {
        padding: 40px 24px;
    }
    
    .details-table-section .section-label {
        font-size: 16px;
        padding: 8px 22px;
    }
    
    .details-table td {
        padding: 16px 20px;
        font-size: 15px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .details-table-section {
        padding: 32px 20px;
    }
    
    .details-table-section .section-label {
        font-size: 15px;
        padding: 8px 20px;
    }
    
    .details-table td {
        padding: 14px 16px;
        font-size: 14px;
    }
    
    .details-table td:first-child {
        width: 35%;
    }
}


.authenticity-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 50px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.authenticity-section .section-header {
    text-align: center;
    margin-bottom: 64px;
}

.authenticity-section .section-label {
    display: inline-block;
    background: #FFF0F2;
    color: #ff2442;
    font-size: 18px;
    font-weight: 600;
    padding: 10px 28px;
    border-radius: 24px;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.authenticity-section .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 20px;
    line-height: 1.3;
}

.authenticity-section .section-desc {
    font-size: 18px;
    color: #1A1A1A;
    line-height: 1.8;
    max-width: 680px;
    margin: 0 auto;
}

.authenticity-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.authenticity-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 48px;
    box-shadow: 0 2px 16px rgba(0,0,0,0.06);
    border: 1px solid #f0f0f0;
    transition: all 0.3s ease;
}

.authenticity-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
}

.authenticity-card .card-icon {
    width: 64px;
    height: 64px;
    background: #FFF0F2;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    margin-bottom: 24px;
}

.authenticity-card .card-number {
    font-size: 56px;
    font-weight: 800;
    color: #ff2442;
    line-height: 1;
    margin-bottom: 12px;
}

.authenticity-card .card-unit {
    font-size: 20px;
    color: #ff2442;
    font-weight: 600;
    margin-left: 4px;
}

.authenticity-card .card-title {
    font-size: 24px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 16px;
}

.authenticity-card .card-desc {
    font-size: 17px;
    color: #1A1A1A;
    line-height: 1.8;
}

/* ===== Pad端 ===== */
@media (max-width: 1024px) {
    .authenticity-section {
        padding: 50px 24px;
    }
    .authenticity-section .section-label {
        font-size: 16px;
        padding: 8px 22px;
    }
    .authenticity-section .section-title {
        font-size: 30px;
    }
    .authenticity-section .section-desc {
        font-size: 17px;
    }
    .authenticity-card {
        padding: 36px;
    }
    .authenticity-card .card-number {
        font-size: 48px;
    }
    .authenticity-card .card-title {
        font-size: 22px;
    }
    .authenticity-card .card-desc {
        font-size: 16px;
    }
}

/* ===== 手机端 ===== */
@media (max-width: 768px) {
    .authenticity-section {
        padding: 50px 20px;
    }
    .authenticity-section .section-header {
        margin-bottom: 40px;
    }
    .authenticity-section .section-label {
        font-size: 15px;
        padding: 8px 20px;
    }
    .authenticity-section .section-title {
        font-size: 26px;
    }
    .authenticity-section .section-desc {
        font-size: 16px;
    }
    .authenticity-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .authenticity-card {
        padding: 28px;
    }
    .authenticity-card .card-number {
        font-size: 44px;
    }
    .authenticity-card .card-title {
        font-size: 20px;
    }
    .authenticity-card .card-desc {
        font-size: 15px;
    }
}


.method-section {
    position: relative;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    overflow: hidden;
}

/* 背景图 */
.method-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('https://yiwang.online/wp-content/uploads/2026/04/A_top-down_cinematic_202604122141.jpg');
    background-size: cover;
    background-position: center;
    filter: brightness(0.25);
    z-index: 1;
}

/* 内容容器 */
.method-content {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 50px 20px;
}

.method-content .section-header {
    text-align: center;
    margin-bottom: 20px;
}

.method-content .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 20px;
    text-shadow: 0 2px 8px rgba(0,0,0,0.5);
}

.method-content .section-desc {
    font-size: 18px;
    color: rgba(255,255,255,0.9);
    line-height: 1.8;
    max-width: 720px;
    margin: 0 auto 64px;
    text-align: center;
}

/* 流程图容器 */
.method-flow {
    display: flex;
    align-items: stretch;
    gap: 0;
    margin-bottom: 56px;
}

.method-step {
    flex: 1;
    background: rgba(255, 255, 255, 0.95);
    padding: 36px 16px;
    text-align: center;
    position: relative;
    border-radius: 16px;
    margin: 0 6px;
    transition: all 0.6s ease;
    backdrop-filter: blur(10px);
}

/* 步骤编号 - 默认灰色 */
.step-number {
    width: 48px;
    height: 48px;
    background: #e0e0e0;
    color: #888;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    margin: 0 auto 16px;
    transition: all 0.6s ease;
}

/* 步骤标题 */
.step-title {
    font-size: 18px;
    font-weight: 700;
    color: #666;
    margin-bottom: 10px;
    transition: all 0.6s ease;
}

/* 步骤描述 */
.step-desc {
    font-size: 14px;
    color: #888;
    line-height: 1.6;
    transition: all 0.6s ease;
}

/* 连接线 */
.step-connector {
    width: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.4);
    font-size: 24px;
    flex-shrink: 0;
    transition: all 0.6s ease;
    position: relative;
}

/* 流动光效 - 箭头上的光点 */
.step-connector::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    background: #ff2442;
    border-radius: 50%;
    opacity: 0;
    transition: all 0.6s ease;
    box-shadow: 0 0 16px rgba(255, 36, 66, 0.8);
}

/* ========== 激活状态 ========== */

.method-step.active {
    background: #ffffff;
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.2);
}

.method-step.active .step-number {
    background: #ff2442;
    color: #ffffff;
    transform: scale(1.1);
    box-shadow: 0 4px 16px rgba(255, 36, 66, 0.4);
}

.method-step.active .step-title {
    color: #1A1A1A;
}

.method-step.active .step-desc {
    color: #4A4A4A;
}

/* 箭头激活 */
.step-connector.active {
    color: rgba(255,255,255,0.9);
    transform: scaleX(1.2);
}

.step-connector.active::after {
    opacity: 1;
    animation: flowLight 1.2s ease-in-out infinite;
}

@keyframes flowLight {
    0% {
        left: 20%;
        opacity: 0;
    }
    30% {
        opacity: 1;
    }
    70% {
        opacity: 1;
    }
    100% {
        left: 80%;
        opacity: 0;
    }
}

/* 底部强调文案 */
.method-footer {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,0.2);
    color: #ffffff;
    border-radius: 16px;
    padding: 36px 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    max-width: 800px;
    margin: 0 auto;
}

.method-footer .footer-text {
    font-size: 20px;
    font-weight: 600;
    line-height: 1.6;
}

.method-footer .footer-text span {
    color: #ff6b7a;
}

.method-footer .footer-icon {
    font-size: 48px;
    flex-shrink: 0;
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .method-content {
        padding: 50px 24px;
    }
    
    .method-content .section-title {
        font-size: 30px;
    }
    
    .method-content .section-desc {
        font-size: 17px;
        margin-bottom: 48px;
    }
    
    .method-step {
        padding: 28px 12px;
        margin: 0 4px;
    }
    
    .step-number {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    
    .step-title {
        font-size: 16px;
    }
    
    .step-desc {
        font-size: 13px;
    }
    
    .step-connector {
        width: 24px;
        font-size: 20px;
    }
    
    .method-footer {
        padding: 28px 36px;
    }
    
    .method-footer .footer-text {
        font-size: 18px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .method-content {
        padding: 50px 20px;
    }
    
    .method-content .section-title {
        font-size: 26px;
    }
    
    .method-content .section-desc {
        font-size: 16px;
        margin-bottom: 40px;
    }
    
    .method-flow {
        flex-direction: column;
        gap: 16px;
        margin-bottom: 40px;
    }
    
    .method-step {
        margin: 0;
        padding: 28px 24px;
        display: flex;
        align-items: center;
        gap: 20px;
        text-align: left;
    }
    
    .step-number {
        margin: 0;
        flex-shrink: 0;
    }
    
    .step-content {
        flex: 1;
    }
    
    .step-title {
        font-size: 18px;
        margin-bottom: 6px;
    }
    
    .step-desc {
        font-size: 14px;
    }
    
    .step-connector {
        display: none;
    }
    
    .method-footer {
        flex-direction: column;
        text-align: center;
        padding: 28px;
    }
    
    .method-footer .footer-text {
        font-size: 17px;
    }
}


.coverage-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 50px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.coverage-section .section-header {
    text-align: center;
    margin-bottom: 64px;
}

.coverage-section .section-label {
    display: inline-block;
    background: #FFF0F2;
    color: #ff2442;
    font-size: 18px;
    font-weight: 600;
    padding: 10px 28px;
    border-radius: 24px;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.coverage-section .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 20px;
}

.coverage-section .section-desc {
    font-size: 18px;
    color: #1A1A1A;
    line-height: 1.8;
    max-width: 680px;
    margin: 0 auto;
}

/* 核心数据展示 */
.coverage-stats {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 64px;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    padding: 32px 40px;
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    border: 1px solid #f0f0f0;
    min-width: 180px;
}

.stat-number {
    font-size: 56px;
    font-weight: 800;
    color: #ff2442;
    line-height: 1;
    margin-bottom: 8px;
}

.stat-unit {
    font-size: 20px;
    color: #ff2442;
    font-weight: 600;
}

.stat-label {
    font-size: 16px;
    color: #4A4A4A;
    margin-top: 8px;
}

/* 时间轴 */
.timeline-container {
    margin-bottom: 64px;
    padding: 0 20px;
}

.timeline-bar {
    position: relative;
    height: 60px;
    background: #f0f0f0;
    border-radius: 30px;
    overflow: hidden;
}

.timeline-fill {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 100%;
    background: linear-gradient(90deg, #ff2442 0%, #ff6b7a 100%);
    border-radius: 30px;
}

.timeline-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 16px;
    padding: 0 8px;
}

.timeline-label {
    font-size: 15px;
    color: #737373;
    font-weight: 500;
}

.timeline-label.highlight {
    color: #ff2442;
    font-weight: 700;
    font-size: 16px;
}

.timeline-badge {
    text-align: center;
    margin-top: 24px;
}

.timeline-badge span {
    display: inline-block;
    background: #1A1A1A;
    color: #ffffff;
    font-size: 15px;
    font-weight: 600;
    padding: 12px 28px;
    border-radius: 20px;
}

/* 年份滚动动效区域 */
.year-scroll-section {
    text-align: center;
    margin-bottom: 64px;
    padding: 40px 20px;
    background: linear-gradient(135deg, #FFF0F2 0%, #ffffff 50%, #FFF0F2 100%);
    border-radius: 20px;
    border: 2px solid #ff2442;
    position: relative;
    overflow: hidden;
}

.year-scroll-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,36,66,0.03) 0%, transparent 70%);
    animation: pulseGlow 4s ease-in-out infinite;
}

@keyframes pulseGlow {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 1; }
}

.year-scroll-label {
    font-size: 16px;
    color: #666;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.year-scroll-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    position: relative;
    z-index: 1;
}

.year-scroll-item {
    font-size: 64px;
    font-weight: 800;
    color: #ff2442;
    line-height: 1;
    font-variant-numeric: tabular-nums;
    min-width: 160px;
    text-align: center;
}

.year-scroll-divider {
    font-size: 48px;
    font-weight: 300;
    color: #ff2442;
    opacity: 0.6;
    animation: pulseDivider 2s ease-in-out infinite;
}

@keyframes pulseDivider {
    0%, 100% { opacity: 0.4; transform: scaleX(1); }
    50% { opacity: 0.8; transform: scaleX(1.2); }
}

.year-scroll-note {
    font-size: 18px;
    color: #1A1A1A;
    margin-top: 16px;
    font-weight: 500;
    position: relative;
    z-index: 1;
}

.year-scroll-note span {
    color: #ff2442;
    font-weight: 700;
}

/* 卖点卡片 */
.coverage-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.coverage-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 48px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    border: 1px solid #f0f0f0;
    transition: all 0.3s ease;
}

.coverage-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.1);
}

.coverage-card .card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.coverage-card .card-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    flex-shrink: 0;
}

.coverage-card .card-title-group {
    flex: 1;
}

.coverage-card .card-title {
    font-size: 24px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 6px;
}

.coverage-card .card-subtitle {
    font-size: 15px;
    color: #ff2442;
    font-weight: 500;
}

.coverage-card .card-desc {
    font-size: 17px;
    color: #1A1A1A;
    line-height: 1.8;
}

.coverage-card .card-features {
    margin-top: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.coverage-card .feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    color: #4A4A4A;
}

.coverage-card .feature-item::before {
    content: '✓';
    width: 22px;
    height: 22px;
    background: #FFF0F2;
    color: #ff2442;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .coverage-section {
        padding: 50px 24px;
    }
    
    .coverage-section .section-label {
        font-size: 16px;
        padding: 8px 22px;
    }
    
    .coverage-section .section-title {
        font-size: 30px;
    }
    
    .coverage-section .section-desc {
        font-size: 17px;
    }
    
    .coverage-stats {
        gap: 24px;
        margin-bottom: 48px;
    }
    
    .stat-item {
        min-width: 160px;
        padding: 28px 32px;
    }
    
    .stat-number {
        font-size: 48px;
    }
    
    .timeline-container {
        margin-bottom: 48px;
    }
    
    .year-scroll-section {
        margin-bottom: 48px;
        padding: 32px 16px;
    }
    
    .year-scroll-item {
        font-size: 48px;
        min-width: 120px;
    }
    
    .year-scroll-divider {
        font-size: 36px;
    }
    
    .coverage-cards {
        gap: 24px;
    }
    
    .coverage-card {
        padding: 36px;
    }
    
    .coverage-card .card-title {
        font-size: 22px;
    }
    
    .coverage-card .card-desc {
        font-size: 16px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .coverage-section {
        padding: 50px 20px;
    }
    
    .coverage-section .section-header {
        margin-bottom: 40px;
    }
    
    .coverage-section .section-label {
        font-size: 15px;
        padding: 8px 20px;
    }
    
    .coverage-section .section-title {
        font-size: 26px;
    }
    
    .coverage-section .section-desc {
        font-size: 16px;
    }
    
    .coverage-stats {
        gap: 16px;
        margin-bottom: 40px;
    }
    
    .stat-item {
        min-width: 140px;
        padding: 24px 28px;
    }
    
    .stat-number {
        font-size: 40px;
    }
    
    .stat-label {
        font-size: 14px;
    }
    
    .timeline-container {
        margin-bottom: 40px;
        padding: 0;
    }
    
    .timeline-bar {
        height: 48px;
    }
    
    .timeline-labels {
        display: flex;
        margin-top: 12px;
        padding: 0 4px;
    }
    
    .timeline-label {
        font-size: 13px;
    }
    
    .timeline-label.highlight {
        font-size: 14px;
    }
    
    .timeline-badge {
        margin-top: 16px;
    }
    
    .timeline-badge span {
        font-size: 14px;
        padding: 10px 20px;
    }
    
    .year-scroll-section {
        margin-bottom: 40px;
        padding: 28px 16px;
    }
    
    .year-scroll-item {
        font-size: 36px;
        min-width: 90px;
    }
    
    .year-scroll-divider {
        font-size: 28px;
    }
    
    .year-scroll-note {
        font-size: 15px;
    }
    
    .coverage-cards {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .coverage-card {
        padding: 28px;
    }
    
    .coverage-card .card-avatar {
        width: 52px;
        height: 52px;
        font-size: 24px;
    }
    
    .coverage-card .card-title {
        font-size: 20px;
    }
    
    .coverage-card .card-subtitle {
        font-size: 14px;
    }
    
    .coverage-card .card-desc {
        font-size: 15px;
    }
    
    .coverage-card .feature-item {
        font-size: 14px;
    }
}


.reference-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 50px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.reference-section .section-header {
    text-align: center;
    margin-bottom: 64px;
}

.reference-section .section-label {
    display: inline-block;
    background: #FFF0F2;
    color: #ff2442;
    font-size: 18px;
    font-weight: 600;
    padding: 10px 28px;
    border-radius: 24px;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.reference-section .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 16px;
}

.reference-section .section-subtitle {
    font-size: 20px;
    color: #4A4A4A;
}

/* 主内容区：左侧时间线 + 右侧封面图 */
.reference-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    margin-bottom: 64px;
}

/* 时间线 */
.timeline-wrapper {
    position: relative;
}

.timeline-line {
    position: absolute;
    left: 24px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: #e5e5e5;
    border-radius: 2px;
}

.timeline-line::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 0%;
    background: #ff2442;
    border-radius: 2px;
    animation: timelineGrow 3s ease forwards;
}

@keyframes timelineGrow {
    to { height: 100%; }
}

.timeline-item {
    position: relative;
    padding-left: 64px;
    padding-bottom: 36px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: 0;
    top: 4px;
    width: 52px;
    height: 52px;
    background: #ffffff;
    border: 3px solid #e5e5e5;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    z-index: 2;
    transition: all 0.4s ease;
}

.timeline-item.active .timeline-dot {
    border-color: #ff2442;
    background: #ff2442;
    color: #ffffff;
    transform: scale(1.1);
}

.timeline-phase {
    font-size: 14px;
    font-weight: 600;
    color: #ff2442;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.timeline-title {
    font-size: 22px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 10px;
}

.timeline-desc {
    font-size: 16px;
    color: #4A4A4A;
    line-height: 1.7;
}

/* 封面图 */
.cover-showcase {
    position: relative;
    text-align: center;
}

.cover-showcase img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
    transform: perspective(1000px) rotateY(-5deg);
    transition: all 0.5s ease;
    position: relative;
    z-index: 1;
}

.cover-showcase:hover img {
    transform: perspective(1000px) rotateY(0deg);
    box-shadow: 0 24px 70px rgba(0,0,0,0.2);
}

.cover-badge {
    position: absolute;
    top: -16px;
    right: 20px;
    background: #ff2442;
    color: #ffffff;
    font-size: 14px;
    font-weight: 700;
    padding: 10px 20px;
    border-radius: 20px;
    box-shadow: 0 4px 12px rgba(255, 36, 66, 0.3);
    animation: badgePulse 2s ease infinite;
    z-index: 10;
}

@keyframes badgePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* 底部4个使用场景 */
.usage-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.usage-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    border: 1px solid #f0f0f0;
    transition: all 0.3s ease;
}

.usage-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.usage-card .usage-icon {
    width: 60px;
    height: 60px;
    background: #FFF0F2;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin: 0 auto 20px;
}

.usage-card .usage-title {
    font-size: 18px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 10px;
}

.usage-card .usage-desc {
    font-size: 15px;
    color: #4A4A4A;
    line-height: 1.6;
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .reference-section {
        padding: 50px 24px;
    }
    
    .reference-section .section-label {
        font-size: 16px;
        padding: 8px 22px;
    }
    
    .reference-section .section-title {
        font-size: 30px;
    }
    
    .reference-section .section-subtitle {
        font-size: 18px;
    }
    
    .reference-main {
        gap: 40px;
        margin-bottom: 48px;
    }
    
    .timeline-title {
        font-size: 20px;
    }
    
    .timeline-desc {
        font-size: 15px;
    }
    
    .cover-showcase img {
        max-width: 320px;
    }
    
    .usage-grid {
        gap: 16px;
    }
    
    .usage-card {
        padding: 24px 16px;
    }
    
    .usage-card .usage-icon {
        width: 52px;
        height: 52px;
        font-size: 24px;
    }
    
    .usage-card .usage-title {
        font-size: 16px;
    }
    
    .usage-card .usage-desc {
        font-size: 14px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .reference-section {
        padding: 50px 20px;
    }
    
    .reference-section .section-header {
        margin-bottom: 40px;
    }
    
    .reference-section .section-label {
        font-size: 15px;
        padding: 8px 20px;
    }
    
    .reference-section .section-title {
        font-size: 26px;
    }
    
    .reference-section .section-subtitle {
        font-size: 16px;
    }
    
    .reference-main {
        grid-template-columns: 1fr;
        gap: 40px;
        margin-bottom: 40px;
    }
    
    .cover-showcase {
        order: -1;
        margin-bottom: 0;
    }
    
    .cover-showcase img {
        transform: none;
        max-width: 260px;
    }
    
    .cover-badge {
        font-size: 13px;
        padding: 8px 16px;
    }
    
    .timeline-item {
        padding-left: 56px;
        padding-bottom: 28px;
    }
    
    .timeline-dot {
        width: 44px;
        height: 44px;
        font-size: 18px;
    }
    
    .timeline-title {
        font-size: 18px;
    }
    
    .timeline-desc {
        font-size: 15px;
    }
    
    .usage-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    
    .usage-card {
        padding: 24px 16px;
    }
    
    .usage-card .usage-icon {
        width: 48px;
        height: 48px;
        font-size: 22px;
        margin-bottom: 16px;
    }
    
    .usage-card .usage-title {
        font-size: 16px;
    }
    
    .usage-card .usage-desc {
        font-size: 13px;
    }
}


.service-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 50px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.service-section .section-header {
    text-align: center;
    margin-bottom: 48px;
}

.service-section .section-label {
    display: inline-block;
    background: #FFF0F2;
    color: #ff2442;
    font-size: 18px;
    font-weight: 600;
    padding: 10px 28px;
    border-radius: 24px;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.service-section .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 16px;
}

.service-section .section-subtitle {
    font-size: 20px;
    color: #4A4A4A;
    margin-bottom: 40px;
}

/* 服务时间线 */
.service-timeline {
    max-width: 640px;
    margin: 0 auto 64px;
    padding: 32px 40px;
    background: #F7F7F7;
    border-radius: 16px;
}

.service-timeline-title {
    font-size: 18px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 28px;
    text-align: center;
}

.timeline-months {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    padding-bottom: 36px;
}

.timeline-months::before {
    content: '';
    position: absolute;
    top: 22px;
    left: 0;
    right: 0;
    height: 3px;
    background: #e5e5e5;
    border-radius: 2px;
}

.timeline-months::after {
    content: '';
    position: absolute;
    top: 22px;
    left: 0;
    width: 100%;
    height: 3px;
    background: #ff2442;
    border-radius: 2px;
    animation: serviceLineGrow 2s ease forwards;
}

@keyframes serviceLineGrow {
    from { width: 0; }
    to { width: 100%; }
}

.month-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 2;
}

.month-dot {
    width: 48px;
    height: 48px;
    background: #ffffff;
    border: 3px solid #ff2442;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    color: #ff2442;
    margin-bottom: 12px;
}

.month-label {
    font-size: 14px;
    color: #4A4A4A;
    font-weight: 500;
    position: absolute;
    top: 60px;
    white-space: nowrap;
}

/* 主内容区：左侧服务承诺 + 右侧截图 */
.service-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
}

/* 左侧：服务承诺 */
.service-promises {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.promise-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    border: 1px solid #f0f0f0;
    transition: all 0.3s ease;
}

.promise-card:hover {
    transform: translateX(4px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.promise-card .promise-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.promise-card .promise-icon {
    width: 56px;
    height: 56px;
    background: #FFF0F2;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    flex-shrink: 0;
}

.promise-card .promise-title {
    font-size: 20px;
    font-weight: 700;
    color: #1A1A1A;
}

.promise-card .promise-desc {
    font-size: 16px;
    color: #1A1A1A;
    line-height: 1.7;
    padding-left: 72px;
}

/* 右侧：答疑截图 */
.chat-showcase {
    position: relative;
}

.chat-frame {
    background: #ffffff;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.12);
    overflow: hidden;
    border: 1px solid #e5e5e5;
}

.chat-header {
    background: #f8f9fa;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid #e5e5e5;
}

.chat-avatar {
    width: 44px;
    height: 44px;
    background: #ff2442;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: #ffffff;
}

.chat-info {
    flex: 1;
}

.chat-name {
    font-size: 16px;
    font-weight: 700;
    color: #1A1A1A;
}

.chat-status {
    font-size: 13px;
    color: #27ae60;
    display: flex;
    align-items: center;
    gap: 4px;
}

.chat-status::before {
    content: '';
    width: 8px;
    height: 8px;
    background: #27ae60;
    border-radius: 50%;
}

.chat-body {
    padding: 20px;
    background: #f0f2f5;
    min-height: 300px;
}

.chat-screenshot {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.chat-input-bar {
    padding: 12px 20px;
    background: #ffffff;
    border-top: 1px solid #e5e5e5;
    display: flex;
    align-items: center;
    gap: 10px;
}

.chat-input-placeholder {
    flex: 1;
    height: 40px;
    background: #f0f2f5;
    border-radius: 20px;
    display: flex;
    align-items: center;
    padding: 0 16px;
    font-size: 14px;
    color: #999;
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .service-section {
        padding: 50px 24px;
    }
    
    .service-section .section-label {
        font-size: 16px;
        padding: 8px 22px;
    }
    
    .service-section .section-title {
        font-size: 30px;
    }
    
    .service-section .section-subtitle {
        font-size: 18px;
    }
    
    .service-timeline {
        padding: 28px 32px;
        margin-bottom: 48px;
    }
    
    .service-main {
        gap: 40px;
    }
    
    .promise-card {
        padding: 28px;
    }
    
    .promise-card .promise-icon {
        width: 48px;
        height: 48px;
        font-size: 24px;
    }
    
    .promise-card .promise-title {
        font-size: 18px;
    }
    
    .promise-card .promise-desc {
        font-size: 15px;
        padding-left: 64px;
    }
    
    .chat-frame {
        border-radius: 16px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .service-section {
        padding: 50px 20px;
    }
    
    .service-section .section-header {
        margin-bottom: 32px;
    }
    
    .service-section .section-label {
        font-size: 15px;
        padding: 8px 20px;
    }
    
    .service-section .section-title {
        font-size: 26px;
    }
    
    .service-section .section-subtitle {
        font-size: 16px;
        margin-bottom: 28px;
    }
    
    .service-timeline {
        padding: 24px 20px;
        margin-bottom: 40px;
    }
    
    .service-timeline-title {
        font-size: 16px;
        margin-bottom: 20px;
    }
    
    .timeline-months {
        padding-bottom: 28px;
    }
    
    .month-dot {
        width: 40px;
        height: 40px;
        font-size: 12px;
    }
    
    .month-label {
        font-size: 12px;
        top: 52px;
    }
    
    .service-main {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .chat-showcase {
        order: -1;
    }
    
    .promise-card {
        padding: 24px;
    }
    
    .promise-card .promise-header {
        margin-bottom: 12px;
    }
    
    .promise-card .promise-icon {
        width: 44px;
        height: 44px;
        font-size: 22px;
    }
    
    .promise-card .promise-title {
        font-size: 18px;
    }
    
    .promise-card .promise-desc {
        padding-left: 0;
        margin-top: 12px;
        font-size: 15px;
    }
}


.target-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 50px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.target-section .section-header {
    text-align: center;
    margin-bottom: 64px;
}

.target-section .section-label {
    display: inline-block;
    background: #FFF0F2;
    color: #ff2442;
    font-size: 18px;
    font-weight: 600;
    padding: 10px 28px;
    border-radius: 24px;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.target-section .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 16px;
}

.target-section .section-subtitle {
    font-size: 20px;
    color: #4A4A4A;
}

/* 主内容区 */
.target-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

/* 左侧：原图展示 + 专业说明 */
.pku-visual {
    text-align: center;
}

.pku-image-wrapper {
    margin-bottom: 40px;
}

.pku-image-wrapper img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

.pku-majors-title {
    font-size: 20px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 20px;
}

.majors-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    max-width: 440px;
    margin: 0 auto;
}

.major-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    background: #f8f9fa;
    border-radius: 12px;
    font-size: 16px;
    color: #1A1A1A;
    transition: all 0.3s ease;
}

.major-item:hover {
    background: #FFF0F2;
    color: #ff2442;
}

.major-item::before {
    content: '✓';
    width: 22px;
    height: 22px;
    background: #ff2442;
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

/* 右侧：资料封面展示 */
.material-showcase {
    text-align: center;
}

.material-cover {
    position: relative;
    display: inline-block;
    margin-bottom: 32px;
}

.material-cover img {
    max-width: 300px;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 16px 48px rgba(0,0,0,0.15);
    transition: all 0.5s ease;
}

.material-cover:hover img {
    box-shadow: 0 20px 56px rgba(0,0,0,0.2);
    transform: translateY(-4px);
}

.material-tag {
    position: absolute;
    top: -12px;
    right: -12px;
    background: #ff2442;
    color: #ffffff;
    font-size: 13px;
    font-weight: 700;
    padding: 10px 18px;
    border-radius: 20px;
    box-shadow: 0 4px 12px rgba(255, 36, 66, 0.3);
    z-index: 10;
}

.material-desc {
    padding: 28px;
    background: #f8f9fa;
    border-radius: 12px;
    text-align: left;
    max-width: 340px;
    margin: 0 auto;
}

.material-desc-title {
    font-size: 20px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 12px;
}

.material-desc-text {
    font-size: 18px;
    color: #1A1A1A;
    line-height: 1.7;
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .target-section {
        padding: 50px 24px;
    }
    
    .target-section .section-label {
        font-size: 16px;
        padding: 8px 22px;
    }
    
    .target-section .section-title {
        font-size: 30px;
    }
    
    .target-section .section-subtitle {
        font-size: 18px;
    }
    
    .target-main {
        gap: 40px;
    }
    
    .pku-image-wrapper {
        margin-bottom: 32px;
    }
    
    .pku-majors-title {
        font-size: 18px;
    }
    
    .majors-grid {
        gap: 12px;
    }
    
    .major-item {
        padding: 12px 14px;
        font-size: 15px;
    }
    
    .material-cover img {
        max-width: 260px;
    }
    
    .material-desc {
        padding: 24px;
    }
    
    .material-desc-title {
        font-size: 18px;
    }
    
    .material-desc-text {
        font-size: 16px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .target-section {
        padding: 50px 20px;
    }
    
    .target-section .section-header {
        margin-bottom: 40px;
    }
    
    .target-section .section-label {
        font-size: 15px;
        padding: 8px 20px;
    }
    
    .target-section .section-title {
        font-size: 26px;
    }
    
    .target-section .section-subtitle {
        font-size: 16px;
    }
    
    .target-main {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .pku-image-wrapper {
        margin-bottom: 28px;
    }
    
    .pku-majors-title {
        font-size: 17px;
    }
    
    .majors-grid {
        grid-template-columns: 1fr;
        max-width: 320px;
    }
    
    .major-item {
        padding: 12px 16px;
        font-size: 15px;
    }
    
    .material-cover {
        margin-bottom: 24px;
    }
    
    .material-cover img {
        max-width: 240px;
    }
    
    .material-tag {
        font-size: 12px;
        padding: 8px 14px;
    }
    
    .material-desc {
        padding: 20px;
    }
    
    .material-desc-title {
        font-size: 17px;
    }
    
    .material-desc-text {
        font-size: 15px;
    }
}


.why-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 50px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.why-section .section-header {
    text-align: center;
    margin-bottom: 64px;
}

.why-section .section-label {
    display: inline-block;
    background: #FFF0F2;
    color: #ff2442;
    font-size: 18px;
    font-weight: 600;
    padding: 10px 28px;
    border-radius: 24px;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.why-section .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 16px;
}

.why-section .section-subtitle {
    font-size: 20px;
    color: #4A4A4A;
}

.why-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 64px;
}

.why-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 40px 28px;
    text-align: center;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    border: 1px solid #f0f0f0;
    transition: all 0.3s ease;
}

.why-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.why-card .card-icon {
    width: 72px;
    height: 72px;
    background: #FFF0F2;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    margin: 0 auto 20px;
}

.why-card .card-title {
    font-size: 20px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 12px;
}

.why-card .card-desc {
    font-size: 16px;
    color: #4A4A4A;
    line-height: 1.7;
}

.service-promise {
    background: #f8f9fa;
    border-radius: 16px;
    padding: 48px;
    margin-bottom: 64px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.promise-content .promise-title {
    font-size: 28px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 20px;
}

.promise-content .promise-desc {
    font-size: 17px;
    color: #1A1A1A;
    line-height: 1.8;
    margin-bottom: 28px;
}

.promise-features {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.promise-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 16px;
    color: #1A1A1A;
}

.promise-feature::before {
    content: '✓';
    width: 26px;
    height: 26px;
    background: #ff2442;
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    flex-shrink: 0;
}

.promise-visual {
    text-align: center;
}

.promise-visual img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.course-section {
    margin-bottom: 24px;
}

.course-header {
    text-align: center;
    margin-bottom: 40px;
}

.course-header .course-label {
    display: inline-block;
    background: #e8f4fd;
    color: #1976d2;
    font-size: 18px;
    font-weight: 600;
    padding: 10px 28px;
    border-radius: 24px;
    margin-bottom: 16px;
}

.course-header .course-title {
    font-size: 32px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 12px;
}

.course-header .course-desc {
    font-size: 17px;
    color: #4A4A4A;
}

.course-total {
    display: inline-block;
    background: #FFF0F2;
    color: #ff2442;
    font-size: 18px;
    font-weight: 600;
    padding: 12px 28px;
    border-radius: 24px;
    margin-top: 16px;
}

.course-category {
    background: #ffffff;
    border-radius: 16px;
    margin-bottom: 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    border: 1px solid #f0f0f0;
    overflow: hidden;
}

.category-header {
    padding: 24px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #ffffff;
}

.category-header:hover {
    background: #f8f9fa;
}

.category-header.active {
    background: #e8f4fd;
}

.category-title-group {
    display: flex;
    align-items: center;
    gap: 16px;
}

.category-icon {
    width: 48px;
    height: 48px;
    background: #FFF0F2;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
}

.category-header.active .category-icon {
    background: #1976d2;
}

.category-info {
    flex: 1;
}

.category-name {
    font-size: 18px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 4px;
}

.category-meta {
    font-size: 14px;
    color: #737373;
}

.category-toggle {
    width: 36px;
    height: 36px;
    background: #f0f0f0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: #666;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.category-header.active .category-toggle {
    background: #1976d2;
    color: #ffffff;
    transform: rotate(180deg);
}

.category-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.category-content.open {
    max-height: 3000px;
    padding-top: 8px;
}

.course-list {
    padding: 0 28px 24px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.course-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    background: #f8f9fa;
    border-radius: 10px;
    font-size: 14px;
    color: #1A1A1A;
    transition: all 0.3s ease;
}

.course-item:hover {
    background: #e8f4fd;
    color: #1976d2;
}

.course-item .course-num {
    width: 28px;
    height: 28px;
    background: #e5e5e5;
    color: #666;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

.course-item:hover .course-num {
    background: #1976d2;
    color: #ffffff;
}

.course-footer {
    text-align: center;
    margin-top: 16px;
}

.course-btn {
    display: inline-block;
    background: #1976d2;
    color: #ffffff;
    font-size: 16px;
    font-weight: 600;
    padding: 16px 48px;
    border-radius: 50px;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px rgba(25, 118, 210, 0.3);
}

.course-btn:hover {
    background: #1565c0;
    color: #ffffff;
    transform: translateY(-2px);
}

.preview-section-simple {
    text-align: center;
    padding: 24px 20px 0px;
    max-width: 1200px;
    margin: 0 auto;
}

.preview-section-simple .preview-title {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 20px;
}

.preview-section-simple .preview-desc {
    font-size: 18px;
    color: #4A4A4A;
    line-height: 1.8;
    margin-bottom: 0px;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

@media (max-width: 1024px) {
    .why-section { padding: 50px 24px; }
    .why-section .section-label { font-size: 16px; padding: 8px 22px; }
    .why-section .section-title { font-size: 30px; }
    .why-section .section-subtitle { font-size: 18px; }
    .why-cards { gap: 24px; margin-bottom: 48px; }
    .why-card { padding: 32px 20px; }
    .why-card .card-icon { width: 60px; height: 60px; font-size: 28px; }
    .why-card .card-title { font-size: 18px; }
    .why-card .card-desc { font-size: 15px; }
    .service-promise { padding: 36px; gap: 36px; margin-bottom: 48px; }
    .promise-content .promise-title { font-size: 24px; }
    .promise-content .promise-desc { font-size: 16px; }
    .promise-feature { font-size: 15px; }
    .course-section { margin-bottom: 20px; }
    .course-header { margin-bottom: 32px; }
    .course-header .course-label { font-size: 16px; padding: 8px 22px; }
    .course-header .course-title { font-size: 28px; }
    .course-header .course-desc { font-size: 16px; }
    .course-total { font-size: 16px; padding: 10px 22px; }
    .category-header { padding: 20px 24px; }
    .category-name { font-size: 17px; }
    .course-list { padding: 0 24px 20px; gap: 10px; }
    .course-item { padding: 12px 14px; font-size: 13px; }
    .course-footer { margin-top: 16px; }
    .preview-section-simple { padding: 20px 24px 0px; }
    .preview-section-simple .preview-title { font-size: 30px; }
    .preview-section-simple .preview-desc { font-size: 17px; }
}

@media (max-width: 768px) {
    .why-section { padding: 50px 20px; }
    .why-section .section-header { margin-bottom: 40px; }
    .why-section .section-label { font-size: 15px; padding: 8px 20px; }
    .why-section .section-title { font-size: 26px; }
    .why-section .section-subtitle { font-size: 16px; }
    .why-cards { grid-template-columns: 1fr; gap: 20px; margin-bottom: 40px; }
    .why-card { padding: 28px 24px; }
    .why-card .card-icon { width: 56px; height: 56px; font-size: 26px; margin-bottom: 16px; }
    .why-card .card-title { font-size: 18px; }
    .why-card .card-desc { font-size: 15px; }
    .service-promise { grid-template-columns: 1fr; padding: 28px; margin-bottom: 40px; }
    .promise-content .promise-title { font-size: 22px; }
    .promise-content .promise-desc { font-size: 15px; margin-bottom: 20px; }
    .promise-features { gap: 12px; }
    .promise-feature { font-size: 15px; }
    .course-section { margin-bottom: 16px; }
    .course-header { margin-bottom: 24px; }
    .course-header .course-label { font-size: 15px; padding: 8px 20px; }
    .course-header .course-title { font-size: 24px; }
    .course-header .course-desc { font-size: 15px; }
    .course-total { font-size: 15px; padding: 8px 20px; }
    .category-header { padding: 18px 20px; }
    .category-icon { width: 40px; height: 40px; font-size: 20px; }
    .category-name { font-size: 16px; }
    .category-meta { font-size: 13px; }
    .course-list { grid-template-columns: 1fr; padding: 0 20px 20px; }
    .course-item { padding: 12px 14px; }
    .course-footer { margin-top: 12px; }
    .course-btn { padding: 14px 36px; font-size: 15px; }
    .preview-section-simple { padding: 16px 20px 0px; }
    .preview-section-simple .preview-title { font-size: 26px; }
    .preview-section-simple .preview-desc { font-size: 16px; margin-bottom: 0px; }
}


.testimonials-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 50px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.testimonials-section .section-title {
    text-align: center;
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 16px;
}

.testimonials-section .section-subtitle {
    text-align: center;
    font-size: 20px;
    color: #4A4A4A;
    margin-bottom: 64px;
}

.testimonial-carousel {
    position: relative;
    overflow: hidden;
}

.testimonial-track {
    display: flex;
    transition: transform 0.5s ease;
    gap: 24px;
}

.testimonial-card {
    min-width: calc(33.333% - 16px);
    background: #ffffff;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    border: 1px solid #f5f5f5;
    transition: all 0.3s ease;
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.1);
}

.testimonial-card .quote-icon {
    font-size: 56px;
    color: #ff2442;
    opacity: 0.2;
    line-height: 1;
    margin-bottom: 8px;
}

.testimonial-card .quote-text {
    font-size: 17px;
    line-height: 1.8;
    color: #1A1A1A;
    margin-bottom: 28px;
    font-style: italic;
}

.testimonial-card .author-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.testimonial-card .author-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 700;
    color: #ffffff;
    flex-shrink: 0;
    border: 3px solid #ffffff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.testimonial-card .author-name {
    font-size: 18px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 4px;
}

.testimonial-card .author-tag {
    font-size: 14px;
    color: #ff2442;
    font-weight: 500;
}

/* 轮播控制 */
.carousel-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 24px;
    margin-top: 40px;
}

.carousel-arrow {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: #ffffff;
    border: 1px solid #e5e5e5;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: #ff2442;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    user-select: none;
}

.carousel-arrow:hover {
    background: #ff2442;
    color: #ffffff;
    border-color: #ff2442;
}

.carousel-dots {
    display: flex;
    gap: 10px;
}

.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #ddd;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    padding: 0;
}

.carousel-dot.active {
    background: #ff2442;
    transform: scale(1.2);
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .testimonials-section {
        padding: 50px 24px;
    }
    
    .testimonials-section .section-title {
        font-size: 30px;
    }
    
    .testimonials-section .section-subtitle {
        font-size: 18px;
        margin-bottom: 48px;
    }
    
    .testimonial-card {
        min-width: calc(50% - 12px);
        padding: 32px;
    }
    
    .testimonial-card .quote-icon {
        font-size: 48px;
    }
    
    .testimonial-card .quote-text {
        font-size: 16px;
    }
    
    .testimonial-card .author-avatar {
        width: 52px;
        height: 52px;
    }
    
    .testimonial-card .author-name {
        font-size: 16px;
    }
    
    .carousel-controls {
        margin-top: 32px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .testimonials-section {
        padding: 50px 20px;
    }
    
    .testimonials-section .section-title {
        font-size: 26px;
    }
    
    .testimonials-section .section-subtitle {
        font-size: 16px;
        margin-bottom: 40px;
    }
    
    .testimonial-card {
        min-width: 100%;
        padding: 28px;
    }
    
    .testimonial-card .quote-icon {
        font-size: 44px;
    }
    
    .testimonial-card .quote-text {
        font-size: 15px;
        margin-bottom: 20px;
    }
    
    .testimonial-card .author-avatar {
        width: 48px;
        height: 48px;
        font-size: 20px;
    }
    
    .testimonial-card .author-name {
        font-size: 16px;
    }
    
    .testimonial-card .author-tag {
        font-size: 13px;
    }
    
    .carousel-controls {
        margin-top: 28px;
        gap: 16px;
    }
    
    .carousel-arrow {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
}


.compare-section {
    max-width: 1000px;
    margin: 0 auto;
    padding: 50px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.compare-section .section-header {
    text-align: center;
    margin-bottom: 64px;
}

.compare-section .section-label {
    display: inline-block;
    background: #FFF0F2;
    color: #ff2442;
    font-size: 18px;
    font-weight: 600;
    padding: 10px 28px;
    border-radius: 24px;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.compare-section .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 16px;
}

.compare-section .section-subtitle {
    font-size: 20px;
    color: #4A4A4A;
}

/* 对比表格 */
.compare-table {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 0;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

/* 表头 */
.compare-header {
    padding: 28px 24px;
    font-size: 18px;
    font-weight: 700;
    text-align: left;
}

.compare-header.feature {
    background: #f8f9fa;
    color: #4A4A4A;
}

.compare-header.yiwang {
    background: #ff2442;
    color: #ffffff;
    position: relative;
}

.compare-header.yiwang::after {
    content: '推荐';
    position: absolute;
    top: 8px;
    right: 8px;
    background: #ff6b7a;
    color: #ffffff;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 10px;
}

.compare-header.other {
    background: #e5e5e5;
    color: #999;
}

/* 对比行 */
.compare-row {
    display: contents;
}

.compare-cell {
    padding: 22px 24px;
    font-size: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.compare-cell.feature {
    background: #ffffff;
    color: #1A1A1A;
    font-weight: 600;
    border-bottom: 1px solid #f0f0f0;
}

.compare-cell.yiwang {
    background: #FFF0F2;
    color: #1A1A1A;
    font-weight: 600;
    border-bottom: 1px solid #ffe0e0;
}

.compare-cell.other {
    background: #fafafa;
    color: #999;
    border-bottom: 1px solid #f0f0f0;
}

/* 图标 */
.icon-check {
    width: 26px;
    height: 26px;
    background: #ff2442;
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
}

.icon-cross {
    width: 26px;
    height: 26px;
    background: #e5e5e5;
    color: #bbb;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
}

/* 底部CTA */
.compare-footer {
    text-align: center;
    margin-top: 48px;
}

.compare-footer-text {
    font-size: 20px;
    color: #4A4A4A;
    margin-bottom: 24px;
}

.compare-btn {
    display: inline-block;
    background: #ff2442;
    color: #ffffff;
    font-size: 16px;
    font-weight: 600;
    padding: 16px 48px;
    border-radius: 50px;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(255, 36, 66, 0.4);
}

.compare-btn:hover {
    background: #e01a36;
    color: #ffffff;
    transform: translateY(-2px);
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .compare-section {
        padding: 50px 24px;
    }
    
    .compare-section .section-label {
        font-size: 16px;
        padding: 8px 22px;
    }
    
    .compare-section .section-title {
        font-size: 30px;
    }
    
    .compare-section .section-subtitle {
        font-size: 18px;
    }
    
    .compare-header {
        padding: 24px 20px;
        font-size: 16px;
    }
    
    .compare-cell {
        padding: 18px 20px;
        font-size: 15px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .compare-section {
        padding: 50px 20px;
    }
    
    .compare-section .section-header {
        margin-bottom: 40px;
    }
    
    .compare-section .section-label {
        font-size: 15px;
        padding: 8px 20px;
    }
    
    .compare-section .section-title {
        font-size: 26px;
    }
    
    .compare-section .section-subtitle {
        font-size: 16px;
    }
    
    .compare-table {
        grid-template-columns: 1fr 1fr;
    }
    
    .compare-header.feature,
    .compare-cell.feature {
        display: none;
    }
    
    .compare-header {
        padding: 20px 16px;
        font-size: 15px;
    }
    
    .compare-cell {
        padding: 16px;
        font-size: 14px;
    }
    
    .compare-footer {
        margin-top: 32px;
    }
    
    .compare-footer-text {
        font-size: 17px;
    }
    
    .compare-btn {
        padding: 14px 36px;
        font-size: 15px;
    }
}


.details-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 50px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.details-section .section-header {
    text-align: center;
    margin-bottom: 64px;
}

.details-section .section-label {
    display: inline-block;
    background: #FFF0F2;
    color: #ff2442;
    font-size: 18px;
    font-weight: 600;
    padding: 10px 28px;
    border-radius: 24px;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.details-section .section-title {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 16px;
}

.details-section .section-subtitle {
    font-size: 20px;
    color: #4A4A4A;
}

/* 大图展示区 */
.details-showcase {
    margin-bottom: 64px;
}

.showcase-main {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 12px 40px rgba(0,0,0,0.15);
    margin-bottom: 20px;
}

.showcase-main img {
    width: 100%;
    height: auto;
    display: block;
}

.showcase-tag {
    position: absolute;
    bottom: 24px;
    left: 24px;
    background: rgba(255, 36, 66, 0.95);
    color: #ffffff;
    font-size: 15px;
    font-weight: 600;
    padding: 12px 24px;
    border-radius: 8px;
    backdrop-filter: blur(4px);
}

/* 缩略图网格 */
.showcase-thumbs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.thumb-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    cursor: pointer;
    transition: all 0.3s ease;
    border: 3px solid transparent;
}

.thumb-item:hover,
.thumb-item.active {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    border-color: #ff2442;
}

.thumb-item img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    display: block;
}

.thumb-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0,0,0,0.7);
    color: #ffffff;
    font-size: 14px;
    font-weight: 500;
    padding: 10px 14px;
    text-align: center;
}

/* 卖点说明 */
.details-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-bottom: 64px;
}

.detail-feature {
    text-align: center;
    padding: 40px 28px;
    background: #f8f9fa;
    border-radius: 16px;
    transition: all 0.3s ease;
}

.detail-feature:hover {
    background: #FFF0F2;
    transform: translateY(-4px);
}

.detail-feature .feature-icon {
    width: 64px;
    height: 64px;
    background: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    margin: 0 auto 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.detail-feature .feature-title {
    font-size: 20px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 12px;
}

.detail-feature .feature-desc {
    font-size: 16px;
    color: #4A4A4A;
    line-height: 1.7;
}

/* 大小和厚度展示 */
.size-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
    margin-bottom: 64px;
}

.size-item-large {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0,0,0,0.12);
}

.size-item-large img {
    width: 100%;
    height: auto;
    display: block;
}

.size-item-large .size-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    padding: 48px 28px 28px;
    color: #ffffff;
}

.size-item-large .size-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 10px;
}

.size-item-large .size-desc {
    font-size: 16px;
    opacity: 0.9;
}

/* 规格参数 */
.specs-bar {
    display: flex;
    justify-content: center;
    gap: 64px;
    padding: 40px;
    background: #1A1A1A;
    border-radius: 16px;
    color: #ffffff;
}

.spec-item {
    text-align: center;
}

.spec-number {
    font-size: 40px;
    font-weight: 800;
    color: #ff2442;
    line-height: 1;
    margin-bottom: 10px;
}

.spec-label {
    font-size: 16px;
    opacity: 0.8;
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .details-section {
        padding: 50px 24px;
    }
    
    .details-section .section-label {
        font-size: 16px;
        padding: 8px 22px;
    }
    
    .details-section .section-title {
        font-size: 30px;
    }
    
    .details-section .section-subtitle {
        font-size: 18px;
    }
    
    .details-showcase {
        margin-bottom: 48px;
    }
    
    .thumb-item img {
        height: 160px;
    }
    
    .details-features {
        gap: 20px;
        margin-bottom: 48px;
    }
    
    .detail-feature {
        padding: 32px 20px;
    }
    
    .detail-feature .feature-icon {
        width: 56px;
        height: 56px;
        font-size: 26px;
    }
    
    .detail-feature .feature-title {
        font-size: 18px;
    }
    
    .detail-feature .feature-desc {
        font-size: 15px;
    }
    
    .size-showcase {
        gap: 20px;
        margin-bottom: 48px;
    }
    
    .size-item-large .size-title {
        font-size: 20px;
    }
    
    .size-item-large .size-desc {
        font-size: 15px;
    }
    
    .specs-bar {
        gap: 48px;
        padding: 32px;
    }
    
    .spec-number {
        font-size: 36px;
    }
    
    .spec-label {
        font-size: 15px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .details-section {
        padding: 50px 20px;
    }
    
    .details-section .section-header {
        margin-bottom: 40px;
    }
    
    .details-section .section-label {
        font-size: 15px;
        padding: 8px 20px;
    }
    
    .details-section .section-title {
        font-size: 26px;
    }
    
    .details-section .section-subtitle {
        font-size: 16px;
    }
    
    .details-showcase {
        margin-bottom: 40px;
    }
    
    .showcase-tag {
        font-size: 13px;
        padding: 10px 16px;
        bottom: 16px;
        left: 16px;
    }
    
    .showcase-thumbs {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .thumb-item img {
        height: 200px;
    }
    
    .thumb-label {
        font-size: 13px;
        padding: 8px 12px;
    }
    
    .details-features {
        grid-template-columns: 1fr;
        gap: 16px;
        margin-bottom: 40px;
    }
    
    .detail-feature {
        padding: 28px 24px;
    }
    
    .detail-feature .feature-icon {
        width: 52px;
        height: 52px;
        font-size: 24px;
        margin-bottom: 16px;
    }
    
    .detail-feature .feature-title {
        font-size: 18px;
    }
    
    .detail-feature .feature-desc {
        font-size: 15px;
    }
    
    .size-showcase {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-bottom: 40px;
    }
    
    .size-item-large .size-overlay {
        padding: 36px 20px 20px;
    }
    
    .size-item-large .size-title {
        font-size: 18px;
    }
    
    .size-item-large .size-desc {
        font-size: 14px;
    }
    
    .specs-bar {
        flex-wrap: wrap;
        gap: 32px;
        padding: 28px;
    }
    
    .spec-number {
        font-size: 32px;
    }
    
    .spec-label {
        font-size: 14px;
    }
}


.cta-final {
    background: #f8f9fa;
    padding: 80px 20px;
    text-align: center;
}

.cta-box {
    max-width: 560px;
    margin: 0 auto;
}

.cta-box h2 {
    font-size: 36px;
    font-weight: 700;
    color: #1A1A1A;
    margin-bottom: 16px;
}

.cta-box > p {
    font-size: 18px;
    color: #4A4A4A;
    margin-bottom: 32px;
    line-height: 1.6;
}

.price-row {
    margin-bottom: 36px;
}

.price {
    font-size: 48px;
    font-weight: 800;
    color: #ff2442;
    margin-right: 16px;
    line-height: 1;
}

.note {
    font-size: 16px;
    color: #737373;
}

.buy-links {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.buy-links a {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.buy-links a:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    color: #ffffff;
}

.link-taobao {
    background: #ff5000;
    color: #fff;
}

.link-xhs {
    background: #ff2442;
    color: #fff;
}

/* ===== Pad端 (768px - 1024px) ===== */
@media (max-width: 1024px) {
    .cta-final {
        padding: 64px 24px;
    }
    
    .cta-box h2 {
        font-size: 30px;
    }
    
    .cta-box > p {
        font-size: 17px;
    }
    
    .price {
        font-size: 40px;
    }
    
    .note {
        font-size: 15px;
    }
    
    .buy-links a {
        padding: 14px 28px;
        font-size: 15px;
    }
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .cta-final {
        padding: 48px 20px;
    }
    
    .cta-box h2 {
        font-size: 26px;
        margin-bottom: 12px;
    }
    
    .cta-box > p {
        font-size: 16px;
        margin-bottom: 24px;
    }
    
    .price-row {
        margin-bottom: 28px;
    }
    
    .price {
        font-size: 36px;
    }
    
    .note {
        font-size: 14px;
        display: block;
        margin-top: 8px;
    }
    
    .buy-links {
        flex-direction: column;
        gap: 12px;
    }
    
    .buy-links a {
        justify-content: center;
        padding: 14px 24px;
    }
}


.floating-buy-btn {
    position: fixed;
    bottom: 120px;
    right: 30px;
    z-index: 9999;
    display: flex;
    align-items: center;
    gap: 8px;
    background: #ff2442;
    color: #ffffff;
    font-size: 16px;
    font-weight: 600;
    padding: 16px 28px;
    border-radius: 50px;
    text-decoration: none;
    box-shadow: 0 4px 20px rgba(255, 36, 66, 0.4);
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

.floating-buy-btn:hover {
    background: #e01a36;
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(255, 36, 66, 0.5);
    color: #ffffff;
}

.floating-buy-btn svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* ===== 手机端 (< 768px) ===== */
@media (max-width: 768px) {
    .floating-buy-btn {
        bottom: 20px;
        right: 20px;
        padding: 14px 24px;
        font-size: 15px;
    }
    
    .floating-buy-btn svg {
        width: 18px;
        height: 18px;
    }
}