/* ========================================
   溏心mv网红视频 - 全站样式表
   品牌色: #FFD700(金黄) #1a1a2e(深蓝黑) #e94560(品牌红)
   ======================================== */

/* Reset & Base */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif; color: #333; background: #f8f9fa; line-height: 1.8; }
a { color: #e94560; text-decoration: none; transition: color .3s; }
a:hover { color: #FFD700; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header { background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%); position: sticky; top: 0; z-index: 1000; box-shadow: 0 2px 20px rgba(0,0,0,.3); }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 12px 20px; max-width: 1200px; margin: 0 auto; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo img { height: 45px; width: auto; }
.logo-text { color: #FFD700; font-size: 1.3rem; font-weight: 700; letter-spacing: 1px; }
.logo-text span { color: #fff; font-size: .8rem; display: block; font-weight: 400; letter-spacing: 0; }

/* Navigation */
.main-nav ul { display: flex; gap: 5px; }
.main-nav a { color: #ccc; padding: 8px 16px; border-radius: 6px; font-size: .9rem; transition: all .3s; }
.main-nav a:hover, .main-nav a.active { color: #FFD700; background: rgba(255,215,0,.1); }
.mobile-menu-btn { display: none; background: none; border: none; color: #FFD700; font-size: 1.5rem; cursor: pointer; }

/* Search Bar */
.search-bar { background: linear-gradient(135deg, #16213e 0%, #0f3460 100%); padding: 15px 0; }
.search-bar .container { display: flex; justify-content: center; }
.search-form { display: flex; max-width: 600px; width: 100%; }
.search-form input { flex: 1; padding: 12px 20px; border: 2px solid #FFD700; border-right: none; border-radius: 25px 0 0 25px; background: rgba(255,255,255,.1); color: #fff; font-size: .95rem; outline: none; }
.search-form input::placeholder { color: rgba(255,255,255,.5); }
.search-form input:focus { background: rgba(255,255,255,.15); }
.search-form button { padding: 12px 30px; background: linear-gradient(135deg, #FFD700, #FFA500); border: none; border-radius: 0 25px 25px 0; color: #1a1a2e; font-weight: 700; cursor: pointer; font-size: .95rem; transition: all .3s; }
.search-form button:hover { background: linear-gradient(135deg, #FFA500, #FF8C00); }

/* Hero Banner */
.hero-banner { position: relative; overflow: hidden; min-height: 420px; display: flex; align-items: center; background: #1a1a2e; }
.hero-banner img { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: cover; opacity: .6; }
.hero-content { position: relative; z-index: 2; padding: 60px 40px; max-width: 650px; }
.hero-content h1 { font-size: 2.5rem; color: #FFD700; margin-bottom: 15px; text-shadow: 2px 2px 10px rgba(0,0,0,.5); line-height: 1.3; }
.hero-content p { color: #eee; font-size: 1.1rem; margin-bottom: 25px; text-shadow: 1px 1px 5px rgba(0,0,0,.5); }
.hero-btn { display: inline-block; padding: 14px 35px; background: linear-gradient(135deg, #e94560, #FF6B6B); color: #fff; border-radius: 30px; font-weight: 700; font-size: 1rem; transition: all .3s; box-shadow: 0 4px 15px rgba(233,69,96,.4); }
.hero-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 25px rgba(233,69,96,.6); color: #fff; }

/* Section Common */
.section { padding: 60px 0; }
.section-dark { background: #1a1a2e; color: #fff; }
.section-gray { background: #f0f2f5; }
.section-title { text-align: center; margin-bottom: 45px; }
.section-title h2 { font-size: 2rem; color: #1a1a2e; margin-bottom: 10px; position: relative; display: inline-block; }
.section-dark .section-title h2 { color: #FFD700; }
.section-title h2::after { content: ''; display: block; width: 60px; height: 3px; background: linear-gradient(90deg, #FFD700, #e94560); margin: 10px auto 0; border-radius: 2px; }
.section-title p { color: #666; font-size: 1rem; }
.section-dark .section-title p { color: #aaa; }

/* Video Card Grid */
.video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 25px; }
.video-card { background: #fff; border-radius: 12px; overflow: hidden; box-shadow: 0 4px 15px rgba(0,0,0,.08); transition: all .3s; }
.video-card:hover { transform: translateY(-5px); box-shadow: 0 8px 30px rgba(0,0,0,.15); }
.video-thumb { position: relative; padding-top: 56.25%; overflow: hidden; cursor: pointer; }
.video-thumb img { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.video-card:hover .video-thumb img { transform: scale(1.05); }
.play-btn { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 60px; height: 60px; background: rgba(233,69,96,.85); border-radius: 50%; display: flex; align-items: center; justify-content: center; opacity: 0; transition: all .3s; z-index: 2; }
.play-btn::after { content: ''; display: block; width: 0; height: 0; border-style: solid; border-width: 10px 0 10px 18px; border-color: transparent transparent transparent #fff; margin-left: 3px; }
.video-card:hover .play-btn { opacity: 1; }
.video-duration { position: absolute; bottom: 8px; right: 8px; background: rgba(0,0,0,.75); color: #fff; padding: 2px 8px; border-radius: 4px; font-size: .75rem; z-index: 2; }
.video-info { padding: 15px; }
.video-info h3 { font-size: 1rem; margin-bottom: 8px; line-height: 1.4; color: #1a1a2e; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.video-meta { display: flex; align-items: center; gap: 15px; font-size: .8rem; color: #999; }
.video-meta span { display: flex; align-items: center; gap: 4px; }
.video-tag { display: inline-block; padding: 2px 10px; background: rgba(233,69,96,.1); color: #e94560; border-radius: 12px; font-size: .75rem; margin-top: 8px; }

/* Feature Cards */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 25px; }
.feature-card { background: #fff; padding: 30px 25px; border-radius: 12px; text-align: center; box-shadow: 0 4px 15px rgba(0,0,0,.06); transition: all .3s; border: 1px solid #eee; }
.feature-card:hover { transform: translateY(-5px); border-color: #FFD700; box-shadow: 0 8px 30px rgba(255,215,0,.15); }
.feature-icon { width: 70px; height: 70px; margin: 0 auto 20px; background: linear-gradient(135deg, #FFD700, #FFA500); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.8rem; }
.feature-card h3 { font-size: 1.15rem; color: #1a1a2e; margin-bottom: 10px; }
.feature-card p { color: #666; font-size: .9rem; line-height: 1.7; }

/* Expert Section */
.expert-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 30px; }
.expert-card { background: #fff; border-radius: 12px; overflow: hidden; box-shadow: 0 4px 15px rgba(0,0,0,.08); transition: all .3s; }
.expert-card:hover { transform: translateY(-3px); box-shadow: 0 8px 25px rgba(0,0,0,.12); }
.expert-card .expert-img { width: 120px; height: 120px; border-radius: 50%; object-fit: cover; margin: 25px auto 15px; border: 3px solid #FFD700; }
.expert-card .expert-info { padding: 0 25px 25px; text-align: center; }
.expert-card h3 { font-size: 1.1rem; color: #1a1a2e; margin-bottom: 5px; }
.expert-card .expert-title { color: #e94560; font-size: .85rem; margin-bottom: 10px; }
.expert-card p { color: #666; font-size: .85rem; line-height: 1.6; }
.expert-card .expert-btns { display: flex; gap: 10px; justify-content: center; margin-top: 15px; }
.expert-card .expert-btns a { padding: 6px 18px; border-radius: 20px; font-size: .8rem; font-weight: 600; }
.btn-primary { background: linear-gradient(135deg, #e94560, #FF6B6B); color: #fff !important; }
.btn-outline { border: 1px solid #e94560; color: #e94560 !important; }
.btn-outline:hover { background: #e94560; color: #fff !important; }

/* Partner Logos */
.partner-wall { display: flex; flex-wrap: wrap; justify-content: center; gap: 30px; align-items: center; }
.partner-wall .partner-item { width: 150px; height: 80px; background: #fff; border-radius: 10px; display: flex; align-items: center; justify-content: center; box-shadow: 0 2px 10px rgba(0,0,0,.06); padding: 15px; font-weight: 700; color: #666; font-size: .85rem; text-align: center; border: 1px solid #eee; transition: all .3s; }
.partner-wall .partner-item:hover { border-color: #FFD700; box-shadow: 0 4px 20px rgba(255,215,0,.2); }

/* FAQ Section */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { background: #fff; border-radius: 10px; margin-bottom: 12px; overflow: hidden; box-shadow: 0 2px 10px rgba(0,0,0,.05); border: 1px solid #eee; }
.faq-question { padding: 18px 25px; cursor: pointer; display: flex; justify-content: space-between; align-items: center; font-weight: 600; color: #1a1a2e; transition: all .3s; }
.faq-question:hover { color: #e94560; }
.faq-question .faq-icon { font-size: 1.2rem; transition: transform .3s; color: #FFD700; }
.faq-item.active .faq-icon { transform: rotate(45deg); }
.faq-answer { padding: 0 25px; max-height: 0; overflow: hidden; transition: all .3s; }
.faq-item.active .faq-answer { padding: 0 25px 18px; max-height: 500px; }
.faq-answer p { color: #666; font-size: .9rem; line-height: 1.8; }

/* Reviews */
.review-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 25px; }
.review-card { background: #fff; padding: 25px; border-radius: 12px; box-shadow: 0 4px 15px rgba(0,0,0,.06); border: 1px solid #eee; }
.review-stars { color: #FFD700; font-size: 1rem; margin-bottom: 12px; letter-spacing: 2px; }
.review-card p { color: #555; font-size: .9rem; line-height: 1.7; margin-bottom: 15px; font-style: italic; }
.review-author { display: flex; align-items: center; gap: 10px; }
.review-avatar { width: 40px; height: 40px; border-radius: 50%; background: linear-gradient(135deg, #FFD700, #e94560); display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 700; font-size: .9rem; }
.review-author .author-info { font-size: .8rem; }
.review-author .author-info strong { display: block; color: #1a1a2e; }
.review-author .author-info span { color: #999; }

/* Contact Section */
.contact-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 25px; }
.contact-card { background: #fff; padding: 25px; border-radius: 12px; text-align: center; box-shadow: 0 4px 15px rgba(0,0,0,.06); }
.contact-card .contact-icon { font-size: 2rem; margin-bottom: 12px; }
.contact-card h4 { color: #1a1a2e; margin-bottom: 8px; }
.contact-card p { color: #666; font-size: .85rem; }

/* How-To Guide */
.howto-steps { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 25px; counter-reset: step; }
.howto-step { background: #fff; padding: 30px 20px; border-radius: 12px; text-align: center; position: relative; box-shadow: 0 4px 15px rgba(0,0,0,.06); }
.howto-step::before { counter-increment: step; content: counter(step); position: absolute; top: -15px; left: 50%; transform: translateX(-50%); width: 35px; height: 35px; background: linear-gradient(135deg, #FFD700, #FFA500); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: #1a1a2e; font-weight: 700; font-size: .9rem; }
.howto-step h4 { margin: 10px 0 8px; color: #1a1a2e; }
.howto-step p { color: #666; font-size: .85rem; }

/* Footer */
.site-footer { background: #0d0d1a; color: #aaa; padding: 50px 0 0; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 30px; margin-bottom: 40px; }
.footer-col h4 { color: #FFD700; margin-bottom: 15px; font-size: 1rem; }
.footer-col p, .footer-col a { color: #888; font-size: .85rem; line-height: 2; display: block; }
.footer-col a:hover { color: #FFD700; }
.footer-qrcode { display: flex; gap: 20px; }
.footer-qrcode .qr-item { text-align: center; }
.footer-qrcode .qr-item img { width: 120px; height: 120px; border-radius: 8px; margin-bottom: 5px; }
.footer-qrcode .qr-item span { font-size: .75rem; color: #888; }
.footer-bottom { border-top: 1px solid #222; padding: 20px 0; text-align: center; font-size: .8rem; }
.footer-bottom p { margin-bottom: 5px; }

/* Social Share */
.social-share { display: flex; gap: 12px; justify-content: center; margin-top: 15px; }
.social-share a { width: 40px; height: 40px; border-radius: 50%; display: flex; align-items: center; justify-content: center; color: #fff; font-size: .85rem; transition: all .3s; }
.social-share a:hover { transform: translateY(-3px); }
.share-wechat { background: #07C160; }
.share-weibo { background: #E6162D; }
.share-douyin { background: #161823; }
.share-bilibili { background: #00A1D6; }

/* Breadcrumb */
.breadcrumb { padding: 15px 0; font-size: .85rem; }
.breadcrumb a { color: #666; }
.breadcrumb a:hover { color: #e94560; }
.breadcrumb span { color: #999; margin: 0 8px; }
.breadcrumb .current { color: #e94560; }

/* Page Header */
.page-header { background: linear-gradient(135deg, #1a1a2e, #16213e); padding: 50px 0; text-align: center; }
.page-header h1 { color: #FFD700; font-size: 2rem; margin-bottom: 10px; }
.page-header p { color: #aaa; font-size: 1rem; }

/* Inner Page Content */
.page-content { padding: 40px 0 60px; }
.content-block { background: #fff; padding: 30px; border-radius: 12px; margin-bottom: 25px; box-shadow: 0 4px 15px rgba(0,0,0,.06); }
.content-block h2 { color: #1a1a2e; font-size: 1.4rem; margin-bottom: 15px; padding-bottom: 10px; border-bottom: 2px solid #FFD700; }
.content-block h3 { color: #e94560; font-size: 1.1rem; margin: 15px 0 10px; }
.content-block p { color: #555; line-height: 1.8; margin-bottom: 12px; }

/* Tags */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 15px; }
.tag-cloud a { padding: 4px 14px; background: #f0f2f5; color: #666; border-radius: 15px; font-size: .8rem; transition: all .3s; }
.tag-cloud a:hover { background: #FFD700; color: #1a1a2e; }

/* Stats Bar */
.stats-bar { background: linear-gradient(135deg, #e94560, #FF6B6B); padding: 40px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
.stat-item h3 { font-size: 2.2rem; color: #fff; margin-bottom: 5px; }
.stat-item p { color: rgba(255,255,255,.8); font-size: .9rem; }

/* Lazy Load Placeholder */
.lazy-img { opacity: 0; transition: opacity .5s; }
.lazy-img.loaded { opacity: 1; }

/* Back to Top */
.back-to-top { position: fixed; bottom: 30px; right: 30px; width: 45px; height: 45px; background: linear-gradient(135deg, #FFD700, #FFA500); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: #1a1a2e; font-size: 1.2rem; cursor: pointer; opacity: 0; visibility: hidden; transition: all .3s; z-index: 999; box-shadow: 0 4px 15px rgba(255,215,0,.4); }
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { transform: translateY(-3px); }

/* Responsive */
@media (max-width: 768px) {
  .header-inner { flex-wrap: wrap; }
  .main-nav { display: none; width: 100%; order: 3; }
  .main-nav.active { display: block; }
  .main-nav ul { flex-direction: column; padding: 10px 0; }
  .main-nav a { display: block; padding: 10px 15px; }
  .mobile-menu-btn { display: block; }
  .hero-content h1 { font-size: 1.6rem; }
  .hero-content { padding: 40px 20px; }
  .hero-banner { min-height: 300px; }
  .section { padding: 40px 0; }
  .section-title h2 { font-size: 1.5rem; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 15px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item h3 { font-size: 1.6rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .search-form { max-width: 100%; }
  .expert-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .howto-steps { grid-template-columns: 1fr; }
  .hero-content h1 { font-size: 1.3rem; }
}