/* ============================================
   17c 影视传媒 - 主样式文件
   域名: wz123.com.cn
   版本: 1.0
   ============================================ */

/* ---- CSS变量 ---- */
:root {
    --primary: #0A1628;
    --secondary: #1E90FF;
    --accent: #FF6B35;
    --accent2: #00D4AA;
    --bg-dark: #050D1A;
    --bg-card: #0F1E35;
    --bg-light: #F4F7FC;
    --text-main: #E8EDF5;
    --text-muted: #8A9BBF;
    --text-dark: #1A2540;
    --border: rgba(30,144,255,0.2);
    --shadow: 0 4px 24px rgba(0,0,0,0.35);
    --radius: 12px;
    --radius-sm: 6px;
    --transition: all 0.3s ease;
}

/* ---- 基础重置 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
    background: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.7;
    overflow-x: hidden;
}
a { color: var(--secondary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; outline: none; }
input, textarea, select { outline: none; }

/* ---- 通用工具类 ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.section-light { background: var(--bg-light); color: var(--text-dark); }
.section-dark { background: var(--primary); }
.section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 12px;
    position: relative;
}
.section-title span { color: var(--secondary); }
.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 48px;
    font-size: 1rem;
}
.section-light .section-title { color: var(--text-dark); }
.section-light .section-subtitle { color: #6B7A99; }
.title-line {
    width: 60px; height: 3px;
    background: linear-gradient(90deg, var(--secondary), var(--accent));
    margin: 12px auto 0;
    border-radius: 2px;
}
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 12px 28px;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 600;
    transition: var(--transition);
    white-space: nowrap;
}
.btn-primary {
    background: linear-gradient(135deg, var(--secondary), #0066CC);
    color: #fff;
    box-shadow: 0 4px 16px rgba(30,144,255,0.35);
}
.btn-primary:hover {
    background: linear-gradient(135deg, #3AA0FF, var(--secondary));
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(30,144,255,0.45);
}
.btn-accent {
    background: linear-gradient(135deg, var(--accent), #E05520);
    color: #fff;
    box-shadow: 0 4px 16px rgba(255,107,53,0.35);
}
.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255,107,53,0.45);
    color: #fff;
}
.btn-outline {
    border: 2px solid var(--secondary);
    color: var(--secondary);
    background: transparent;
}
.btn-outline:hover {
    background: var(--secondary);
    color: #fff;
    transform: translateY(-2px);
}
.tag {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 600;
    background: rgba(30,144,255,0.15);
    color: var(--secondary);
    border: 1px solid rgba(30,144,255,0.3);
}
.tag-accent {
    background: rgba(255,107,53,0.15);
    color: var(--accent);
    border-color: rgba(255,107,53,0.3);
}
.tag-green {
    background: rgba(0,212,170,0.15);
    color: var(--accent2);
    border-color: rgba(0,212,170,0.3);
}

/* ---- 顶部公告栏 ---- */
.top-bar {
    background: linear-gradient(90deg, var(--bg-dark), var(--primary));
    border-bottom: 1px solid var(--border);
    padding: 8px 0;
    font-size: 0.82rem;
    color: var(--text-muted);
}
.top-bar .container {
    display: flex; justify-content: space-between; align-items: center;
}
.top-bar-links a {
    color: var(--text-muted);
    margin-left: 16px;
    font-size: 0.82rem;
}
.top-bar-links a:hover { color: var(--secondary); }

/* ---- 导航栏 ---- */
.navbar {
    position: sticky; top: 0; z-index: 1000;
    background: rgba(10,22,40,0.97);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 0;
    box-shadow: 0 2px 20px rgba(0,0,0,0.4);
}
.navbar .container {
    display: flex; align-items: center;
    height: 68px; gap: 0;
}
.navbar-brand {
    display: flex; align-items: center; gap: 10px;
    text-decoration: none; flex-shrink: 0;
    margin-right: 32px;
}
.navbar-brand img.site-logo {
    height: 40px; width: auto;
}
.navbar-brand img.site-icon {
    height: 32px; width: 32px;
    border-radius: 6px;
}
.brand-name {
    font-size: 1.5rem; font-weight: 800;
    color: #fff; letter-spacing: 1px;
}
.brand-name span { color: var(--accent); }
.nav-menu {
    display: flex; align-items: center; gap: 2px;
    flex: 1;
}
.nav-item { position: relative; }
.nav-link {
    display: flex; align-items: center; gap: 4px;
    padding: 8px 14px;
    color: var(--text-main);
    font-size: 0.92rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    white-space: nowrap;
}
.nav-link:hover, .nav-link.active {
    color: var(--secondary);
    background: rgba(30,144,255,0.1);
}
.nav-link svg { width: 14px; height: 14px; transition: var(--transition); }
.nav-item:hover .nav-link svg { transform: rotate(180deg); }
/* 下拉菜单 */
.dropdown-menu {
    position: absolute; top: 100%; left: 0;
    min-width: 180px;
    background: var(--primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow);
    opacity: 0; visibility: hidden;
    transform: translateY(8px);
    transition: var(--transition);
    z-index: 999;
}
.nav-item:hover .dropdown-menu {
    opacity: 1; visibility: visible; transform: translateY(0);
}
.dropdown-menu a {
    display: block; padding: 10px 16px;
    color: var(--text-main); font-size: 0.88rem;
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}
.dropdown-menu a:last-child { border-bottom: none; }
.dropdown-menu a:hover {
    background: rgba(30,144,255,0.1);
    color: var(--secondary);
    padding-left: 22px;
}
/* 搜索框 */
.nav-search {
    display: flex; align-items: center;
    background: rgba(255,255,255,0.07);
    border: 1px solid var(--border);
    border-radius: 50px;
    padding: 6px 14px;
    margin-left: auto;
    gap: 8px;
    min-width: 200px;
    transition: var(--transition);
}
.nav-search:focus-within {
    border-color: var(--secondary);
    background: rgba(30,144,255,0.08);
    box-shadow: 0 0 0 3px rgba(30,144,255,0.12);
}
.nav-search input {
    background: transparent; border: none;
    color: var(--text-main); font-size: 0.88rem;
    width: 100%;
}
.nav-search input::placeholder { color: var(--text-muted); }
.nav-search button {
    background: none; color: var(--text-muted);
    font-size: 1rem; padding: 0;
    transition: var(--transition);
}
.nav-search button:hover { color: var(--secondary); }
/* 汉堡菜单 */
.hamburger {
    display: none; flex-direction: column; gap: 5px;
    cursor: pointer; padding: 6px; margin-left: 12px;
}
.hamburger span {
    display: block; width: 24px; height: 2px;
    background: var(--text-main); border-radius: 2px;
    transition: var(--transition);
}

/* ---- 搜索栏（导航下方） ---- */
.search-bar-section {
    background: var(--primary);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
}
.search-bar-inner {
    display: flex; align-items: center; gap: 12px;
    max-width: 700px; margin: 0 auto;
}
.search-bar-inner input {
    flex: 1;
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border);
    border-radius: 50px;
    padding: 10px 20px;
    color: var(--text-main);
    font-size: 0.95rem;
    transition: var(--transition);
}
.search-bar-inner input:focus {
    border-color: var(--secondary);
    background: rgba(30,144,255,0.07);
}
.search-bar-inner input::placeholder { color: var(--text-muted); }
.search-bar-inner button {
    background: linear-gradient(135deg, var(--secondary), #0066CC);
    color: #fff; border-radius: 50px;
    padding: 10px 24px; font-size: 0.92rem;
    font-weight: 600; transition: var(--transition);
}
.search-bar-inner button:hover { opacity: 0.88; transform: translateY(-1px); }
.search-hot-tags {
    text-align: center; margin-top: 8px;
    font-size: 0.82rem; color: var(--text-muted);
}
.search-hot-tags a {
    color: var(--text-muted); margin: 0 6px;
    transition: var(--transition);
}
.search-hot-tags a:hover { color: var(--secondary); }

/* ---- Hero Banner ---- */
.hero-banner {
    position: relative;
    min-height: 580px;
    display: flex; align-items: center;
    overflow: hidden;
}
.hero-bg {
    position: absolute; inset: 0;
    background-image: url('../images/banner_hero.jpg');
    background-size: cover; background-position: center;
    filter: brightness(0.45);
    z-index: 0;
}
.hero-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(10,22,40,0.85) 0%, rgba(30,144,255,0.15) 100%);
    z-index: 1;
}
.hero-content {
    position: relative; z-index: 2;
    max-width: 700px;
    padding: 80px 0;
}
.hero-badge {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(30,144,255,0.15);
    border: 1px solid rgba(30,144,255,0.4);
    border-radius: 50px;
    padding: 6px 16px; font-size: 0.82rem;
    color: var(--secondary); margin-bottom: 20px;
}
.hero-badge span { width: 8px; height: 8px; border-radius: 50%; background: var(--secondary); animation: pulse 1.5s infinite; }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:0.5;transform:scale(1.3)} }
.hero-title {
    font-size: 3rem; font-weight: 800; line-height: 1.2;
    margin-bottom: 20px; color: #fff;
}
.hero-title .brand { color: var(--secondary); }
.hero-title .highlight { color: var(--accent); }
.hero-desc {
    font-size: 1.05rem; color: rgba(255,255,255,0.8);
    margin-bottom: 32px; line-height: 1.8;
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats {
    display: flex; gap: 40px; margin-top: 48px;
    padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.12);
}
.hero-stat-num {
    font-size: 2rem; font-weight: 800; color: var(--secondary);
    line-height: 1;
}
.hero-stat-label {
    font-size: 0.82rem; color: rgba(255,255,255,0.6);
    margin-top: 4px;
}
/* 滚动指示 */
.scroll-hint {
    position: absolute; bottom: 24px; left: 50%;
    transform: translateX(-50%); z-index: 2;
    display: flex; flex-direction: column; align-items: center;
    gap: 6px; color: rgba(255,255,255,0.5); font-size: 0.78rem;
}
.scroll-hint-arrow {
    width: 20px; height: 20px;
    border-right: 2px solid rgba(255,255,255,0.4);
    border-bottom: 2px solid rgba(255,255,255,0.4);
    transform: rotate(45deg);
    animation: scrollDown 1.5s infinite;
}
@keyframes scrollDown { 0%,100%{transform:rotate(45deg) translateY(0)} 50%{transform:rotate(45deg) translateY(5px)} }

/* ---- 视频卡片 ---- */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}
.video-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
    cursor: pointer;
}
.video-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(30,144,255,0.2);
    border-color: rgba(30,144,255,0.5);
}
.video-thumb {
    position: relative; overflow: hidden;
    aspect-ratio: 16/9;
    background: var(--primary);
}
.video-thumb img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.video-play-btn {
    position: absolute; inset: 0;
    display: flex; align-items: center; justify-content: center;
    background: rgba(0,0,0,0.3);
    opacity: 0; transition: var(--transition);
}
.video-card:hover .video-play-btn { opacity: 1; }
.play-icon {
    width: 56px; height: 56px;
    background: rgba(30,144,255,0.9);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    transform: scale(0.8); transition: var(--transition);
    box-shadow: 0 4px 20px rgba(30,144,255,0.5);
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon svg { width: 22px; height: 22px; fill: #fff; margin-left: 3px; }
.video-duration {
    position: absolute; bottom: 8px; right: 8px;
    background: rgba(0,0,0,0.75);
    color: #fff; font-size: 0.78rem;
    padding: 2px 7px; border-radius: 4px;
}
.video-tag-badge {
    position: absolute; top: 8px; left: 8px;
}
.video-info { padding: 14px 16px; }
.video-title {
    font-size: 0.95rem; font-weight: 600;
    color: var(--text-main); margin-bottom: 8px;
    display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden;
    line-height: 1.5;
}
.video-meta {
    display: flex; align-items: center; gap: 12px;
    font-size: 0.8rem; color: var(--text-muted);
}
.video-meta span { display: flex; align-items: center; gap: 4px; }
.video-meta svg { width: 13px; height: 13px; }

/* ---- 特色模块卡片 ---- */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
}
.feature-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 32px 24px;
    border: 1px solid var(--border);
    transition: var(--transition);
    text-align: center;
}
.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--secondary);
    box-shadow: 0 8px 32px rgba(30,144,255,0.15);
}
.feature-icon {
    width: 64px; height: 64px;
    border-radius: 16px;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.8rem;
}
.feature-icon-blue { background: linear-gradient(135deg, rgba(30,144,255,0.2), rgba(30,144,255,0.05)); }
.feature-icon-orange { background: linear-gradient(135deg, rgba(255,107,53,0.2), rgba(255,107,53,0.05)); }
.feature-icon-green { background: linear-gradient(135deg, rgba(0,212,170,0.2), rgba(0,212,170,0.05)); }
.feature-icon-purple { background: linear-gradient(135deg, rgba(138,43,226,0.2), rgba(138,43,226,0.05)); }
.feature-card h3 {
    font-size: 1.1rem; font-weight: 700;
    margin-bottom: 10px; color: var(--text-main);
}
.feature-card p {
    font-size: 0.88rem; color: var(--text-muted);
    line-height: 1.7;
}

/* ---- 图文模块 ---- */
.media-section-inner {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 60px; align-items: center;
}
.media-section-inner.reverse { direction: rtl; }
.media-section-inner.reverse > * { direction: ltr; }
.media-img { border-radius: var(--radius); overflow: hidden; }
.media-img img { width: 100%; border-radius: var(--radius); }
.media-text h2 {
    font-size: 1.8rem; font-weight: 700;
    margin-bottom: 16px; color: var(--text-main);
}
.media-text p {
    color: var(--text-muted); line-height: 1.8;
    margin-bottom: 16px;
}
.media-text ul { margin-bottom: 24px; }
.media-text ul li {
    display: flex; align-items: flex-start; gap: 10px;
    color: var(--text-muted); margin-bottom: 10px;
    font-size: 0.92rem;
}
.media-text ul li::before {
    content: '▶';
    color: var(--secondary); font-size: 0.7rem;
    margin-top: 4px; flex-shrink: 0;
}

/* ---- 专家卡片 ---- */
.expert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 24px;
}
.expert-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
    text-align: center;
}
.expert-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(30,144,255,0.15);
    border-color: rgba(30,144,255,0.4);
}
.expert-avatar {
    width: 100%; aspect-ratio: 1/1;
    overflow: hidden; position: relative;
}
.expert-avatar img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform 0.4s ease;
}
.expert-card:hover .expert-avatar img { transform: scale(1.05); }
.expert-info { padding: 20px 16px; }
.expert-name {
    font-size: 1.05rem; font-weight: 700;
    color: var(--text-main); margin-bottom: 4px;
}
.expert-role {
    font-size: 0.82rem; color: var(--secondary);
    margin-bottom: 10px;
}
.expert-desc {
    font-size: 0.82rem; color: var(--text-muted);
    line-height: 1.6; margin-bottom: 14px;
}
.expert-btns { display: flex; gap: 8px; justify-content: center; }
.expert-btns a {
    font-size: 0.8rem; padding: 6px 14px;
    border-radius: 50px;
}

/* ---- 评价卡片 ---- */
.review-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}
.review-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 24px;
    border: 1px solid var(--border);
    transition: var(--transition);
}
.review-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}
.review-stars { color: #FFB800; font-size: 1rem; margin-bottom: 12px; }
.review-text {
    font-size: 0.9rem; color: var(--text-muted);
    line-height: 1.7; margin-bottom: 16px;
    font-style: italic;
}
.review-text::before { content: '"'; color: var(--secondary); font-size: 1.5rem; }
.review-author {
    display: flex; align-items: center; gap: 12px;
}
.review-avatar {
    width: 40px; height: 40px; border-radius: 50%;
    background: linear-gradient(135deg, var(--secondary), var(--accent));
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-weight: 700; font-size: 0.9rem;
    flex-shrink: 0;
}
.review-author-name { font-size: 0.88rem; font-weight: 600; color: var(--text-main); }
.review-author-meta { font-size: 0.78rem; color: var(--text-muted); }

/* ---- FAQ ---- */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    overflow: hidden;
}
.faq-question {
    display: flex; justify-content: space-between; align-items: center;
    padding: 18px 20px;
    cursor: pointer;
    font-size: 0.95rem; font-weight: 600;
    color: var(--text-main);
    transition: var(--transition);
}
.faq-question:hover { color: var(--secondary); }
.faq-icon {
    width: 24px; height: 24px;
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0; font-size: 1rem;
    color: var(--secondary); transition: var(--transition);
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
    max-height: 0; overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    padding: 0 20px;
    font-size: 0.88rem; color: var(--text-muted); line-height: 1.8;
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 20px 18px; }

/* ---- 合作品牌 ---- */
.partner-logos {
    display: flex; flex-wrap: wrap;
    gap: 16px; justify-content: center;
    align-items: center;
}
.partner-logo {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 28px;
    font-size: 0.95rem; font-weight: 700;
    color: var(--text-muted);
    transition: var(--transition);
    min-width: 120px; text-align: center;
}
.partner-logo:hover {
    border-color: var(--secondary);
    color: var(--secondary);
    transform: translateY(-2px);
}

/* ---- 联系/底部 ---- */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 24px;
}
.contact-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 28px 20px;
    border: 1px solid var(--border);
    text-align: center;
    transition: var(--transition);
}
.contact-card:hover {
    border-color: var(--secondary);
    transform: translateY(-3px);
}
.contact-icon {
    font-size: 2rem; margin-bottom: 12px;
}
.contact-card h4 {
    font-size: 0.95rem; font-weight: 700;
    color: var(--text-main); margin-bottom: 8px;
}
.contact-card p {
    font-size: 0.85rem; color: var(--text-muted); line-height: 1.6;
}
.qr-row {
    display: flex; gap: 40px; justify-content: center;
    flex-wrap: wrap; margin-top: 40px;
}
.qr-item { text-align: center; }
.qr-item img {
    width: 140px; height: 140px;
    border-radius: var(--radius-sm);
    border: 2px solid var(--border);
    margin: 0 auto 10px;
}
.qr-item p { font-size: 0.82rem; color: var(--text-muted); }

/* ---- 页脚 ---- */
.footer {
    background: var(--bg-dark);
    border-top: 1px solid var(--border);
    padding: 60px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--border);
}
.footer-brand img { height: 36px; margin-bottom: 16px; }
.footer-brand p {
    font-size: 0.85rem; color: var(--text-muted);
    line-height: 1.8; margin-bottom: 20px;
}
.footer-social { display: flex; gap: 10px; }
.social-btn {
    width: 36px; height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    color: var(--text-muted); font-size: 0.85rem;
    transition: var(--transition);
    text-decoration: none;
}
.social-btn:hover {
    border-color: var(--secondary);
    color: var(--secondary);
    background: rgba(30,144,255,0.1);
}
.footer-col h5 {
    font-size: 0.95rem; font-weight: 700;
    color: var(--text-main); margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
}
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
    font-size: 0.85rem; color: var(--text-muted);
    transition: var(--transition);
}
.footer-col ul li a:hover { color: var(--secondary); padding-left: 4px; }
.footer-bottom {
    padding: 20px 0;
    display: flex; justify-content: space-between; align-items: center;
    flex-wrap: wrap; gap: 12px;
    font-size: 0.82rem; color: var(--text-muted);
}
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--secondary); }

/* ---- 分享按钮 ---- */
.share-bar {
    display: flex; gap: 10px; flex-wrap: wrap;
    align-items: center; justify-content: center;
    padding: 20px 0;
}
.share-btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 8px 18px;
    border-radius: 50px;
    font-size: 0.85rem; font-weight: 600;
    transition: var(--transition);
    border: 1px solid transparent;
}
.share-wechat { background: #07C160; color: #fff; }
.share-weibo { background: #E6162D; color: #fff; }
.share-douyin { background: #010101; color: #fff; border-color: #69C9D0; }
.share-bilibili { background: #00A1D6; color: #fff; }
.share-btn:hover { opacity: 0.85; transform: translateY(-2px); color: #fff; }

/* ---- 面包屑 ---- */
.breadcrumb {
    padding: 12px 0;
    font-size: 0.82rem; color: var(--text-muted);
    display: flex; align-items: center; gap: 6px;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--secondary); }
.breadcrumb span { color: var(--text-muted); }

/* ---- 页面头部 ---- */
.page-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--bg-dark) 100%);
    padding: 60px 0 40px;
    border-bottom: 1px solid var(--border);
    position: relative; overflow: hidden;
}
.page-header::before {
    content: '';
    position: absolute; top: -50%; right: -10%;
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(30,144,255,0.08) 0%, transparent 70%);
    border-radius: 50%;
}
.page-header h1 {
    font-size: 2.2rem; font-weight: 800;
    color: #fff; margin-bottom: 10px;
}
.page-header h1 span { color: var(--secondary); }
.page-header p { color: var(--text-muted); font-size: 1rem; }

/* ---- 统计数字 ---- */
.stats-row {
    display: flex; gap: 0;
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
}
.stat-item {
    flex: 1; text-align: center;
    padding: 28px 16px;
    border-right: 1px solid var(--border);
    transition: var(--transition);
}
.stat-item:last-child { border-right: none; }
.stat-item:hover { background: rgba(30,144,255,0.05); }
.stat-num {
    font-size: 2rem; font-weight: 800;
    color: var(--secondary); line-height: 1;
    margin-bottom: 6px;
}
.stat-label { font-size: 0.82rem; color: var(--text-muted); }

/* ---- 标签列表 ---- */
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; }

/* ---- 加载动画 ---- */
.lazy-img { opacity: 0; transition: opacity 0.4s ease; }
.lazy-img.loaded { opacity: 1; }

/* ---- 滚动到顶部 ---- */
#back-to-top {
    position: fixed; bottom: 32px; right: 32px;
    width: 44px; height: 44px;
    background: var(--secondary);
    color: #fff; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.1rem; box-shadow: 0 4px 16px rgba(30,144,255,0.4);
    opacity: 0; visibility: hidden;
    transition: var(--transition); z-index: 999;
    cursor: pointer; border: none;
}
#back-to-top.show { opacity: 1; visibility: visible; }
#back-to-top:hover { background: var(--accent); transform: translateY(-3px); }

/* ---- 通知条 ---- */
.notice-bar {
    background: linear-gradient(90deg, var(--secondary), #0066CC);
    color: #fff; padding: 10px 0;
    font-size: 0.88rem; text-align: center;
    position: relative;
}
.notice-bar a { color: #fff; text-decoration: underline; }

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .media-section-inner { grid-template-columns: 1fr; gap: 32px; }
    .media-section-inner.reverse { direction: ltr; }
}
@media (max-width: 768px) {
    .hero-title { font-size: 2rem; }
    .section { padding: 56px 0; }
    .section-title { font-size: 1.6rem; }
    .nav-menu { display: none; flex-direction: column; position: fixed; top: 68px; left: 0; right: 0; background: var(--primary); padding: 16px; border-bottom: 1px solid var(--border); z-index: 999; }
    .nav-menu.open { display: flex; }
    .hamburger { display: flex; }
    .nav-search { display: none; }
    .hero-stats { gap: 20px; flex-wrap: wrap; }
    .stats-row { flex-wrap: wrap; }
    .stat-item { min-width: 50%; border-bottom: 1px solid var(--border); }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .top-bar .container { flex-direction: column; gap: 4px; }
    .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
}
@media (max-width: 480px) {
    .hero-title { font-size: 1.6rem; }
    .hero-btns { flex-direction: column; }
    .container { padding: 0 14px; }
    .video-grid { grid-template-columns: 1fr; }
    .feature-grid { grid-template-columns: 1fr; }
    .expert-grid { grid-template-columns: repeat(2, 1fr); }
    .review-grid { grid-template-columns: 1fr; }
}