/* ============================================
   玩物社区 - 完全原创CSS设计
   配色灵感：暖糖渐变 + 深邃夜空
   ============================================ */

/* CSS Variables - 原创配色方案 */
:root {
    --primary-color: #e84393;
    --primary-dark: #c0306e;
    --primary-light: #fd79a8;
    --secondary-color: #6c5ce7;
    --secondary-dark: #5341c5;
    --accent-color: #ffeaa7;
    --accent-warm: #fdcb6e;
    --text-primary: #2d3436;
    --text-secondary: #636e72;
    --text-light: #b2bec3;
    --text-white: #ffffff;
    --bg-primary: #0a0a1a;
    --bg-secondary: #12122a;
    --bg-card: #1a1a3e;
    --bg-card-hover: #222255;
    --bg-gradient-start: #0a0a1a;
    --bg-gradient-end: #1a0a2e;
    --border-color: rgba(232, 67, 147, 0.15);
    --border-light: rgba(255, 255, 255, 0.06);
    --border-radius-sm: 6px;
    --border-radius: 12px;
    --border-radius-lg: 20px;
    --border-radius-xl: 28px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(232, 67, 147, 0.2);
    --transition-fast: 0.2s ease;
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1280px;
    --nav-height: 72px;
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-white);
    line-height: 1.7;
    overflow-x: hidden;
    min-height: 100vh;
}

a {
    color: var(--primary-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-warm);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    list-style: none;
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   导航栏 - 毛玻璃悬浮设计
   ============================================ */
.site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--nav-height);
    background: rgba(10, 10, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    transition: background var(--transition);
}

.site-nav.scrolled {
    background: rgba(10, 10, 26, 0.95);
    box-shadow: var(--shadow);
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-white);
    letter-spacing: -0.5px;
}

.nav-logo .logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.nav-logo span.brand-highlight {
    background: linear-gradient(135deg, var(--primary-light), var(--accent-warm));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-menu a {
    color: var(--text-light);
    padding: 8px 16px;
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--text-white);
    background: rgba(232, 67, 147, 0.12);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 20px;
    height: 2px;
    background: var(--primary-color);
    border-radius: 1px;
    transition: transform var(--transition);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    transform: translateX(-50%) scaleX(1);
}

.nav-download-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 22px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-white) !important;
    border-radius: 50px;
    font-size: 0.88rem;
    font-weight: 600;
    transition: all var(--transition);
    box-shadow: 0 4px 15px rgba(232, 67, 147, 0.3);
}

.nav-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(232, 67, 147, 0.45);
    color: var(--text-white) !important;
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    background: none;
    border: none;
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-white);
    border-radius: 2px;
    transition: all var(--transition);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   欢迎区域 - 渐变光晕背景
   ============================================ */
.hero-section {
    padding: 140px 0 80px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -200px;
    right: -200px;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(232, 67, 147, 0.12) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: -150px;
    left: -150px;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(108, 92, 231, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-content h1 .highlight {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-warm));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content .hero-desc {
    font-size: 1.05rem;
    color: var(--text-light);
    line-height: 1.9;
    max-width: 680px;
    margin: 0 auto;
}

/* ============================================
   通用区块标题
   ============================================ */
.section-block {
    padding: 80px 0;
    position: relative;
}

.section-block:nth-child(even) {
    background: var(--bg-secondary);
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    display: block;
    width: 50px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    margin: 12px auto 0;
    border-radius: 2px;
}

.section-title p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 8px;
}

/* ============================================
   精选视频区
   ============================================ */
.featured-video {
    background: var(--bg-secondary);
}

.featured-video-wrapper {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 40px;
    align-items: center;
}

.featured-player {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    aspect-ratio: 16/9;
    background: var(--bg-card);
    box-shadow: var(--shadow-lg);
}

.featured-player img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.featured-player .play-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.3);
    transition: background var(--transition);
    cursor: pointer;
}

.featured-player .play-overlay:hover {
    background: rgba(0, 0, 0, 0.15);
}

.play-btn {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: rgba(232, 67, 147, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    box-shadow: 0 0 30px rgba(232, 67, 147, 0.4);
}

.play-btn::after {
    content: '';
    display: block;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 12px 0 12px 22px;
    border-color: transparent transparent transparent white;
    margin-left: 4px;
}

.play-overlay:hover .play-btn {
    transform: scale(1.1);
    box-shadow: 0 0 50px rgba(232, 67, 147, 0.6);
}

.featured-info h3 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.featured-info .featured-desc {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 24px;
}

.featured-info .featured-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.featured-info .featured-tags span {
    padding: 5px 14px;
    background: rgba(232, 67, 147, 0.1);
    border: 1px solid rgba(232, 67, 147, 0.2);
    border-radius: 50px;
    font-size: 0.82rem;
    color: var(--primary-light);
}

/* ============================================
   关于我们
   ============================================ */
.about-section .about-content {
    max-width: 860px;
    margin: 0 auto;
    text-align: center;
}

.about-section .about-content p {
    color: var(--text-light);
    font-size: 1rem;
    line-height: 2;
    margin-bottom: 16px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.stat-item {
    text-align: center;
    padding: 28px 16px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-light);
    transition: all var(--transition);
}

.stat-item:hover {
    transform: translateY(-4px);
    border-color: var(--border-color);
    box-shadow: var(--shadow-glow);
}

.stat-item .stat-num {
    font-size: 2.2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-warm));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    margin-bottom: 6px;
}

.stat-item .stat-label {
    font-size: 0.88rem;
    color: var(--text-secondary);
}

/* ============================================
   视频卡片网格
   ============================================ */
.video-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.video-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--border-light);
    transition: all var(--transition);
    cursor: pointer;
}

.video-card:hover {
    transform: translateY(-6px);
    border-color: rgba(232, 67, 147, 0.3);
    box-shadow: var(--shadow-glow);
}

.video-card .card-thumb {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
    background: var(--bg-secondary);
}

.video-card .card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.video-card:hover .card-thumb img {
    transform: scale(1.08);
}

.video-card .card-thumb .duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    padding: 3px 8px;
    background: rgba(0, 0, 0, 0.75);
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-white);
}

.video-card .card-body {
    padding: 16px;
}

.video-card .card-body h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 10px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-card .video-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.video-card .rating {
    color: var(--accent-warm);
    font-size: 0.82rem;
    font-weight: 600;
}

.video-card .views {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.video-card .video-desc {
    color: var(--text-secondary);
    font-size: 0.82rem;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ============================================
   资质认证区
   ============================================ */
.cert-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.cert-card {
    padding: 32px 24px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-light);
    text-align: center;
    transition: all var(--transition);
}

.cert-card:hover {
    border-color: var(--border-color);
    transform: translateY(-4px);
}

.cert-card .cert-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(232, 67, 147, 0.15), rgba(108, 92, 231, 0.15));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.cert-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.cert-card p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.6;
}

/* ============================================
   支付方式
   ============================================ */
.payment-icons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 24px;
}

.payment-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 20px 28px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-light);
    transition: all var(--transition);
    min-width: 120px;
}

.payment-item:hover {
    border-color: var(--border-color);
    transform: translateY(-3px);
}

.payment-item .pay-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    font-weight: 700;
}

.payment-item .pay-icon.alipay { background: rgba(0, 166, 226, 0.15); color: #00a6e2; }
.payment-item .pay-icon.wechat { background: rgba(7, 193, 96, 0.15); color: #07c160; }
.payment-item .pay-icon.unionpay { background: rgba(226, 0, 26, 0.15); color: #e2001a; }
.payment-item .pay-icon.visa { background: rgba(26, 31, 113, 0.15); color: #6c7ae0; }
.payment-item .pay-icon.crypto { background: rgba(247, 147, 26, 0.15); color: #f7931a; }

.payment-item span {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ============================================
   客户支持
   ============================================ */
.support-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.support-card {
    padding: 36px 28px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-light);
    text-align: center;
    transition: all var(--transition);
}

.support-card:hover {
    border-color: var(--border-color);
}

.support-card .support-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 18px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.support-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.support-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ============================================
   负责任观影
   ============================================ */
.responsible-content {
    max-width: 860px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.responsible-item {
    padding: 28px 24px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-light);
    border-top: 3px solid var(--primary-color);
}

.responsible-item h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--primary-light);
}

.responsible-item p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.7;
}

/* ============================================
   FAQ 手风琴
   ============================================ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-light);
    overflow: hidden;
    transition: border-color var(--transition);
}

.faq-item.active {
    border-color: rgba(232, 67, 147, 0.3);
}

.faq-question {
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    user-select: none;
    transition: background var(--transition-fast);
}

.faq-question:hover {
    background: rgba(255, 255, 255, 0.02);
}

.faq-question h3 {
    font-size: 0.95rem;
    font-weight: 600;
    flex: 1;
    padding-right: 16px;
}

.faq-question .faq-toggle {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(232, 67, 147, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--transition);
}

.faq-question .faq-toggle::before {
    content: '+';
    font-size: 1.2rem;
    color: var(--primary-light);
    font-weight: 300;
    line-height: 1;
}

.faq-item.active .faq-toggle {
    background: var(--primary-color);
    transform: rotate(45deg);
}

.faq-item.active .faq-toggle::before {
    color: var(--text-white);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
}

.faq-answer-inner {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.8;
}

/* ============================================
   用户评价
   ============================================ */
.review-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.review-card {
    padding: 28px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-light);
    transition: all var(--transition);
}

.review-card:hover {
    border-color: var(--border-color);
    transform: translateY(-3px);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 14px;
}

.review-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-white);
    flex-shrink: 0;
}

.review-user-info .review-name {
    font-size: 0.92rem;
    font-weight: 600;
    display: block;
}

.review-user-info .review-location {
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.review-stars {
    color: var(--accent-warm);
    font-size: 0.85rem;
    margin-bottom: 10px;
    letter-spacing: 2px;
}

.review-text {
    color: var(--text-light);
    font-size: 0.88rem;
    line-height: 1.7;
    margin-bottom: 10px;
}

.review-date {
    font-size: 0.78rem;
    color: var(--text-secondary);
}

/* ============================================
   热门标签云
   ============================================ */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    max-width: 900px;
    margin: 0 auto;
}

.tag-cloud a {
    display: inline-block;
    padding: 8px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 50px;
    font-size: 0.88rem;
    color: var(--text-light);
    transition: all var(--transition);
    white-space: nowrap;
}

.tag-cloud a:hover {
    background: rgba(232, 67, 147, 0.12);
    border-color: rgba(232, 67, 147, 0.3);
    color: var(--primary-light);
    transform: translateY(-2px);
}

.tag-cloud a.tag-lg {
    font-size: 1rem;
    padding: 10px 24px;
    font-weight: 600;
}

.tag-cloud a.tag-sm {
    font-size: 0.8rem;
    padding: 6px 14px;
}

/* ============================================
   页脚
   ============================================ */
.site-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-light);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}

.footer-brand .footer-logo {
    font-size: 1.3rem;
    font-weight: 800;
    margin-bottom: 14px;
    display: block;
}

.footer-brand .footer-logo .brand-highlight {
    background: linear-gradient(135deg, var(--primary-light), var(--accent-warm));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.7;
}

.footer-col h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 18px;
    color: var(--text-white);
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    color: var(--text-secondary);
    font-size: 0.88rem;
    transition: color var(--transition-fast);
}

.footer-col ul li a:hover {
    color: var(--primary-light);
}

.footer-bottom {
    border-top: 1px solid var(--border-light);
    padding: 24px 0;
    text-align: center;
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 0.82rem;
    line-height: 1.8;
}

.footer-bottom .icp-info {
    margin-top: 4px;
}

/* ============================================
   面包屑导航
   ============================================ */
.breadcrumb {
    padding: 100px 0 0;
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.breadcrumb a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

.breadcrumb a:hover {
    color: var(--primary-light);
}

.breadcrumb span {
    color: var(--text-white);
    font-weight: 500;
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 16px 0;
    font-size: 0.88rem;
}

.breadcrumb-list a {
    color: var(--text-secondary);
}

.breadcrumb-list a:hover {
    color: var(--primary-light);
}

.breadcrumb-list .separator {
    color: var(--text-secondary);
}

.breadcrumb-list .current {
    color: var(--text-white);
    font-weight: 500;
}

/* ============================================
   分类页头部
   ============================================ */
.category-header {
    padding: 20px 0 40px;
    text-align: center;
}

.category-header h1 {
    font-size: 2.4rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.category-header .subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* ============================================
   分类页文章
   ============================================ */
.article-content {
    max-width: 860px;
    margin: 0 auto;
    padding: 0 0 60px;
}

.article-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 40px 0 18px;
    padding-left: 16px;
    border-left: 4px solid var(--primary-color);
}

.article-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 28px 0 14px;
    color: var(--primary-light);
}

.article-content p {
    color: var(--text-light);
    font-size: 0.98rem;
    line-height: 2;
    margin-bottom: 18px;
}

.article-content .article-img {
    margin: 28px 0;
    border-radius: var(--border-radius);
    overflow: hidden;
    background: var(--bg-card);
}

.article-content .article-img img {
    width: 100%;
    display: block;
}

.article-content a {
    color: var(--primary-light);
    border-bottom: 1px dashed var(--primary-light);
    transition: all var(--transition-fast);
}

.article-content a:hover {
    color: var(--accent-warm);
    border-color: var(--accent-warm);
}

/* ============================================
   返回顶部按钮
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition);
    box-shadow: 0 4px 20px rgba(232, 67, 147, 0.3);
    z-index: 999;
    border: none;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 30px rgba(232, 67, 147, 0.5);
}

.back-to-top::before {
    content: '';
    display: block;
    width: 12px;
    height: 12px;
    border-top: 2.5px solid white;
    border-right: 2.5px solid white;
    transform: rotate(-45deg) translate(1px, 1px);
}

/* ============================================
   响应式设计
   ============================================ */

/* 平板端 */
@media (max-width: 1200px) {
    .video-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .featured-video-wrapper {
        grid-template-columns: 1fr;
    }

    .cert-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .support-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .review-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .responsible-content {
        grid-template-columns: 1fr;
    }
}

/* 移动端 */
@media (max-width: 768px) {
    :root {
        --nav-height: 60px;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: rgba(10, 10, 26, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px;
        gap: 4px;
        transform: translateY(-120%);
        opacity: 0;
        transition: all var(--transition);
        border-bottom: 1px solid var(--border-light);
    }

    .nav-menu.open {
        transform: translateY(0);
        opacity: 1;
    }

    .nav-menu a {
        width: 100%;
        padding: 12px 16px;
        font-size: 1rem;
    }

    .nav-download-btn {
        margin-top: 8px;
        justify-content: center;
    }

    .hero-section {
        padding: 110px 0 60px;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content .hero-desc {
        font-size: 0.92rem;
    }

    .section-block {
        padding: 50px 0;
    }

    .section-title h2 {
        font-size: 1.5rem;
    }

    .video-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
    }

    .cert-grid {
        grid-template-columns: 1fr;
    }

    .support-grid {
        grid-template-columns: 1fr;
    }

    .review-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .category-header h1 {
        font-size: 1.8rem;
    }

    .payment-icons {
        gap: 12px;
    }

    .payment-item {
        min-width: 100px;
        padding: 16px 20px;
    }

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .video-grid {
        grid-template-columns: 1fr;
    }

    .hero-content h1 {
        font-size: 1.7rem;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .payment-icons {
        flex-direction: column;
        align-items: center;
    }

    .payment-item {
        width: 100%;
        max-width: 200px;
    }
}

/* ============================================
   动画效果
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   辅助类
   ============================================ */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-warm));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ============================================
   E-E-A-T 增强样式 - 作者信息与时间因子
   ============================================ */
.page-meta {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border-light);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.page-meta .meta-author::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary-color);
    margin-right: 8px;
    vertical-align: middle;
}

.content-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 10px 0 16px;
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.content-meta .meta-editor::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--secondary-color);
    margin-right: 6px;
    vertical-align: middle;
}

/* 文章作者信息卡片 */
.article-author-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    margin: 24px 0;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-light);
    border-left: 4px solid var(--primary-color);
}

.article-author-card .author-avatar {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-white);
    flex-shrink: 0;
}

.article-author-card .author-info {
    flex: 1;
}

.article-author-card .author-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-white);
    display: block;
    margin-bottom: 4px;
}

.article-author-card .author-title {
    font-size: 0.82rem;
    color: var(--text-secondary);
    display: block;
    margin-bottom: 4px;
}

.article-author-card .author-bio {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* 文章元信息条 */
.article-meta-bar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    padding: 14px 0;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-light);
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.article-meta-bar .meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.article-meta-bar .meta-dot {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--text-secondary);
}

/* 评价汇总 */
.review-summary {
    text-align: center;
    margin-bottom: 36px;
}

.review-score {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 20px 40px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-light);
}

.review-score .score-num {
    font-size: 2.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-light), var(--accent-warm));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.review-score .score-stars {
    color: var(--accent-warm);
    font-size: 1.2rem;
    letter-spacing: 3px;
}

.review-score .score-count {
    font-size: 0.82rem;
    color: var(--text-secondary);
}

/* 页脚信任信息 */
.footer-trust {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--border-light);
}

.footer-trust .trust-info {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* 相关推荐模块 */
.related-section {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--border-light);
}

.related-section h2 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 20px;
    padding-left: 16px;
    border-left: 4px solid var(--primary-color);
}

.related-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.related-links a {
    display: block;
    padding: 14px 18px;
    background: var(--bg-card);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-light);
    color: var(--text-light);
    font-size: 0.9rem;
    transition: all var(--transition);
}

.related-links a:hover {
    border-color: rgba(232, 67, 147, 0.3);
    color: var(--primary-light);
    transform: translateX(4px);
}

@media (max-width: 768px) {
    .page-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    .content-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }
    .article-author-card {
        flex-direction: column;
        text-align: center;
    }
    .article-meta-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    .related-links {
        grid-template-columns: 1fr;
    }
    .review-score {
        padding: 16px 28px;
    }
    .review-score .score-num {
        font-size: 2.2rem;
    }
}