/* ST直播 - 主样式文件 */
:root{
  --primary:#5c1adc;
  --primary-light:#7c3aed;
  --secondary:#e040fb;
  --accent:#ff6b35;
  --dark:#0f0a1e;
  --dark2:#1a1030;
  --card-bg:#1e1535;
  --text:#e8e0f5;
  --text-muted:#9985c0;
  --border:#2d2050;
  --success:#22c55e;
  --warning:#f59e0b;
  --radius:12px;
  --shadow:0 4px 24px rgba(92,26,220,0.18);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{background:var(--dark);color:var(--text);font-family:'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;line-height:1.7;overflow-x:hidden}
a{color:var(--primary-light);text-decoration:none;transition:color .2s}
a:hover{color:var(--secondary)}
img{max-width:100%;height:auto;display:block}
ul{list-style:none}

/* ===== HEADER ===== */
.site-header{position:sticky;top:0;z-index:1000;background:rgba(15,10,30,0.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);padding:0}
.header-inner{max-width:1280px;margin:0 auto;padding:0 20px;display:flex;align-items:center;gap:20px;height:64px}
.logo-wrap{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-icon{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--secondary));display:flex;align-items:center;justify-content:center;font-weight:900;font-size:14px;color:#fff;letter-spacing:-1px}
.logo-text{font-size:20px;font-weight:800;background:linear-gradient(90deg,#a78bfa,#e040fb);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.main-nav{display:flex;align-items:center;gap:4px;flex:1;overflow:hidden}
.main-nav a{padding:6px 12px;border-radius:8px;font-size:14px;font-weight:500;color:var(--text-muted);white-space:nowrap;transition:all .2s}
.main-nav a:hover,.main-nav a.active{background:rgba(92,26,220,0.2);color:#fff}
.header-search{display:flex;align-items:center;gap:8px;background:var(--dark2);border:1px solid var(--border);border-radius:24px;padding:6px 14px;min-width:200px}
.header-search input{background:none;border:none;outline:none;color:var(--text);font-size:14px;width:100%}
.header-search input::placeholder{color:var(--text-muted)}
.search-btn{background:none;border:none;cursor:pointer;color:var(--text-muted);font-size:16px;padding:0;display:flex;align-items:center}
.search-btn:hover{color:var(--secondary)}
.header-actions{display:flex;gap:8px;flex-shrink:0}
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:24px;font-size:14px;font-weight:600;cursor:pointer;transition:all .2s;border:none}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff}
.btn-primary:hover{opacity:.9;transform:translateY(-1px);box-shadow:var(--shadow)}
.btn-outline{background:transparent;border:1.5px solid var(--primary-light);color:var(--primary-light)}
.btn-outline:hover{background:var(--primary);color:#fff}
.btn-sm{padding:5px 12px;font-size:13px}
.btn-accent{background:linear-gradient(135deg,var(--accent),#ff9a00);color:#fff}

/* ===== HERO ===== */
.hero{position:relative;min-height:560px;display:flex;align-items:center;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.35)}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(92,26,220,.7) 0%,rgba(224,64,251,.3) 100%)}
.hero-content{position:relative;z-index:2;max-width:1280px;margin:0 auto;padding:80px 20px;width:100%}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);border-radius:20px;padding:4px 14px;font-size:13px;margin-bottom:20px}
.live-dot{width:8px;height:8px;border-radius:50%;background:#ff4444;animation:pulse 1.5s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.6;transform:scale(1.3)}}
.hero h1{font-size:clamp(2rem,5vw,3.5rem);font-weight:900;line-height:1.2;margin-bottom:16px}
.hero h1 span{background:linear-gradient(90deg,#a78bfa,#e040fb,#ff6b35);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-desc{font-size:1.1rem;color:rgba(255,255,255,.8);max-width:600px;margin-bottom:32px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero-stats{display:flex;gap:32px;margin-top:48px;flex-wrap:wrap}
.stat-item{text-align:center}
.stat-num{font-size:2rem;font-weight:900;background:linear-gradient(90deg,#a78bfa,#e040fb);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.stat-label{font-size:13px;color:rgba(255,255,255,.6)}

/* ===== SECTIONS ===== */
.section{padding:64px 20px}
.section-inner{max-width:1280px;margin:0 auto}
.section-header{text-align:center;margin-bottom:48px}
.section-tag{display:inline-block;background:rgba(92,26,220,.2);border:1px solid rgba(92,26,220,.4);color:#a78bfa;border-radius:20px;padding:4px 14px;font-size:13px;margin-bottom:12px}
.section-title{font-size:clamp(1.5rem,3vw,2.2rem);font-weight:800;margin-bottom:12px}
.section-title span{background:linear-gradient(90deg,#a78bfa,#e040fb);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.section-desc{color:var(--text-muted);max-width:600px;margin:0 auto}
.section-alt{background:var(--dark2)}

/* ===== VIDEO CARDS ===== */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.video-card{background:var(--card-bg);border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);transition:all .3s;cursor:pointer}
.video-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--primary)}
.video-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#0a0618}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .video-thumb img{transform:scale(1.06)}
.play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.3);opacity:0;transition:opacity .3s}
.video-card:hover .play-btn{opacity:1}
.play-icon{width:56px;height:56px;border-radius:50%;background:rgba(255,255,255,.9);display:flex;align-items:center;justify-content:center;font-size:22px;color:var(--primary);transform:scale(.8);transition:transform .3s}
.video-card:hover .play-icon{transform:scale(1)}
.video-live-badge{position:absolute;top:10px;left:10px;background:#ff4444;color:#fff;font-size:11px;font-weight:700;padding:2px 8px;border-radius:4px;display:flex;align-items:center;gap:4px}
.video-info{padding:14px}
.video-title{font-size:15px;font-weight:600;margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--text-muted)}
.video-tag{background:rgba(92,26,220,.2);color:#a78bfa;padding:2px 8px;border-radius:4px;font-size:11px}
.video-views::before{content:'▶ '}
.video-likes::before{content:'♥ '}

/* ===== FEATURE MODULES ===== */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}
.feature-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:24px 20px;text-align:center;transition:all .3s}
.feature-card:hover{border-color:var(--primary);transform:translateY(-3px);box-shadow:var(--shadow)}
.feature-icon{width:56px;height:56px;border-radius:16px;margin:0 auto 14px;display:flex;align-items:center;justify-content:center;font-size:26px}
.feature-title{font-size:15px;font-weight:700;margin-bottom:6px}
.feature-desc{font-size:13px;color:var(--text-muted)}

/* ===== EXPERT CARDS ===== */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:24px}
.expert-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:all .3s}
.expert-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.expert-avatar{aspect-ratio:3/4;overflow:hidden;position:relative}
.expert-avatar img{width:100%;height:100%;object-fit:cover}
.expert-body{padding:16px}
.expert-name{font-size:17px;font-weight:800;margin-bottom:4px}
.expert-role{font-size:13px;color:var(--secondary);margin-bottom:8px}
.expert-desc{font-size:13px;color:var(--text-muted);margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.expert-actions{display:flex;gap:8px}
.expert-badge{display:inline-block;background:rgba(224,64,251,.15);color:var(--secondary);border-radius:4px;padding:2px 8px;font-size:11px;margin-right:4px;margin-bottom:4px}

/* ===== NEWS ===== */
.news-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:24px}
.news-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:all .3s;display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.news-thumb{aspect-ratio:16/9;overflow:hidden}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.news-card:hover .news-thumb img{transform:scale(1.05)}
.news-body{padding:16px;flex:1;display:flex;flex-direction:column}
.news-cat{font-size:12px;color:var(--secondary);margin-bottom:8px;font-weight:600}
.news-title{font-size:16px;font-weight:700;margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;flex:1}
.news-title a{color:var(--text)}
.news-title a:hover{color:var(--secondary)}
.news-meta{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--text-muted);margin-top:auto;padding-top:12px;border-top:1px solid var(--border)}

/* ===== FAQ ===== */
.faq-list{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.faq-q{padding:16px 20px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;transition:background .2s}
.faq-q:hover{background:rgba(92,26,220,.1)}
.faq-q::after{content:'＋';font-size:20px;color:var(--primary-light);transition:transform .3s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease,padding .3s}
.faq-item.open .faq-a{max-height:300px;padding:0 20px 16px}
.faq-a p{color:var(--text-muted);font-size:14px;line-height:1.8}

/* ===== REVIEWS ===== */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.review-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:20px}
.review-stars{color:#f59e0b;font-size:14px;margin-bottom:8px}
.review-text{font-size:14px;color:var(--text-muted);margin-bottom:14px;line-height:1.7}
.review-user{display:flex;align-items:center;gap:10px}
.review-avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--secondary));display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;color:#fff;flex-shrink:0}
.review-name{font-size:14px;font-weight:600}
.review-date{font-size:12px;color:var(--text-muted)}

/* ===== PARTNER LOGOS ===== */
.partner-row{display:flex;flex-wrap:wrap;gap:16px;justify-content:center;align-items:center}
.partner-item{background:var(--card-bg);border:1px solid var(--border);border-radius:10px;padding:12px 24px;font-size:14px;font-weight:700;color:var(--text-muted);transition:all .2s}
.partner-item:hover{border-color:var(--primary);color:var(--text)}

/* ===== BREADCRUMB ===== */
.breadcrumb{background:var(--dark2);padding:12px 20px;border-bottom:1px solid var(--border)}
.breadcrumb-inner{max-width:1280px;margin:0 auto;display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-muted)}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb a:hover{color:var(--text)}
.breadcrumb span{color:var(--text)}

/* ===== PAGINATION ===== */
.pagination{display:flex;justify-content:center;gap:8px;margin-top:40px;flex-wrap:wrap}
.page-btn{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:10px;background:var(--card-bg);border:1px solid var(--border);color:var(--text-muted);font-size:14px;transition:all .2s;cursor:pointer}
.page-btn:hover,.page-btn.active{background:var(--primary);border-color:var(--primary);color:#fff}
.page-btn.disabled{opacity:.4;cursor:not-allowed}

/* ===== SHARE BAR ===== */
.share-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.share-label{font-size:14px;color:var(--text-muted)}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:20px;font-size:13px;font-weight:600;cursor:pointer;border:none;transition:all .2s}
.share-wechat{background:#07c160;color:#fff}
.share-weibo{background:#e6162d;color:#fff}
.share-douyin{background:#000;color:#fff;border:1px solid #333}
.share-bilibili{background:#00a1d6;color:#fff}
.share-btn:hover{opacity:.85;transform:translateY(-1px)}

/* ===== CONTACT ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
@media(max-width:768px){.contact-grid{grid-template-columns:1fr}}
.contact-info h3{font-size:20px;font-weight:800;margin-bottom:16px}
.contact-item{display:flex;gap:12px;margin-bottom:16px;align-items:flex-start}
.contact-icon{width:40px;height:40px;border-radius:10px;background:rgba(92,26,220,.2);display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}
.contact-label{font-size:13px;color:var(--text-muted)}
.contact-val{font-size:15px;font-weight:600}
.qr-row{display:flex;gap:24px;flex-wrap:wrap}
.qr-item{text-align:center}
.qr-item img{width:120px;height:120px;border-radius:10px;border:2px solid var(--border)}
.qr-item p{font-size:12px;color:var(--text-muted);margin-top:6px}

/* ===== FOOTER ===== */
.site-footer{background:var(--dark2);border-top:1px solid var(--border);padding:48px 20px 24px}
.footer-inner{max-width:1280px;margin:0 auto}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
@media(max-width:900px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:500px){.footer-grid{grid-template-columns:1fr}}
.footer-brand .logo-text{font-size:22px;margin-bottom:12px;display:block}
.footer-brand p{font-size:14px;color:var(--text-muted);line-height:1.8;margin-bottom:16px}
.footer-col h4{font-size:15px;font-weight:700;margin-bottom:14px;color:var(--text)}
.footer-col ul li{margin-bottom:8px}
.footer-col ul li a{font-size:14px;color:var(--text-muted);transition:color .2s}
.footer-col ul li a:hover{color:var(--text)}
.footer-bottom{border-top:1px solid var(--border);padding-top:20px;display:flex;justify-content:space-between;align-items:center;flex-wrap:gap;gap:12px;font-size:13px;color:var(--text-muted)}
.footer-links{display:flex;gap:16px;flex-wrap:wrap}
.footer-links a{color:var(--text-muted)}
.footer-links a:hover{color:var(--text)}

/* ===== INNER PAGE ===== */
.inner-hero{background:linear-gradient(135deg,var(--dark2),var(--dark));padding:48px 20px;border-bottom:1px solid var(--border)}
.inner-hero-inner{max-width:1280px;margin:0 auto}
.inner-hero h1{font-size:clamp(1.6rem,3vw,2.4rem);font-weight:900;margin-bottom:8px}
.inner-hero p{color:var(--text-muted);font-size:15px}
.page-content{max-width:1280px;margin:0 auto;padding:40px 20px}

/* ===== COMMENT SECTION ===== */
.comment-section{margin-top:48px;padding-top:32px;border-top:1px solid var(--border)}
.comment-section h3{font-size:20px;font-weight:800;margin-bottom:24px}
.comment-list{display:flex;flex-direction:column;gap:16px}
.comment-item{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:16px}
.comment-header{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.comment-avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--secondary));display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;color:#fff;flex-shrink:0}
.comment-user{font-size:14px;font-weight:600}
.comment-time{font-size:12px;color:var(--text-muted);margin-left:auto}
.comment-body{font-size:14px;color:var(--text-muted);line-height:1.7}
.comment-reply{margin-left:46px;margin-top:8px;background:rgba(92,26,220,.08);border-radius:8px;padding:10px 14px}
.comment-reply .comment-body{font-size:13px}

/* ===== TAGS ===== */
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.tag{display:inline-block;background:rgba(92,26,220,.15);border:1px solid rgba(92,26,220,.3);color:#a78bfa;border-radius:20px;padding:4px 12px;font-size:12px;transition:all .2s;cursor:pointer}
.tag:hover{background:var(--primary);color:#fff;border-color:var(--primary)}

/* ===== SEARCH RESULT ===== */
#search-results{position:absolute;top:100%;left:0;right:0;background:var(--dark2);border:1px solid var(--border);border-radius:10px;padding:8px;display:none;z-index:100;margin-top:4px}
.search-wrap{position:relative}

/* ===== RESPONSIVE ===== */
.nav-toggle{background:none;border:1px solid var(--border);color:var(--text);border-radius:8px;padding:6px 10px;font-size:18px;cursor:pointer;display:none}
@media(max-width:1024px){
  .nav-toggle{display:block}
  .main-nav{display:none;position:absolute;top:64px;left:0;right:0;background:var(--dark2);border-bottom:1px solid var(--border);flex-direction:column;padding:12px;z-index:999}
  .main-nav.mobile-open{display:flex}
  .header-search{min-width:160px}
}
@media(max-width:768px){
  .hero{min-height:400px}
  .hero-stats{gap:20px}
  .section{padding:40px 16px}
  .video-grid{grid-template-columns:1fr 1fr}
  .expert-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .header-actions .btn-outline{display:none}
  .hero-stats{gap:16px}
  .stat-num{font-size:1.5rem}
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
.fade-in{animation:fadeInUp .6s ease both}
.fade-in-1{animation-delay:.1s}
.fade-in-2{animation-delay:.2s}
.fade-in-3{animation-delay:.3s}

/* ===== MISC ===== */
.divider{height:1px;background:var(--border);margin:32px 0}
.text-center{text-align:center}
.text-muted{color:var(--text-muted)}
.mt-8{margin-top:8px}
.mt-16{margin-top:16px}
.mt-24{margin-top:24px}
.mt-32{margin-top:32px}
.mb-8{margin-bottom:8px}
.mb-16{margin-bottom:16px}
.mb-24{margin-bottom:24px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px}
@media(max-width:640px){.grid-2{grid-template-columns:1fr}}
.card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:24px}
.highlight-box{background:linear-gradient(135deg,rgba(92,26,220,.15),rgba(224,64,251,.1));border:1px solid rgba(92,26,220,.3);border-radius:var(--radius);padding:20px}
.badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:12px;font-weight:600}
.badge-purple{background:rgba(92,26,220,.2);color:#a78bfa}
.badge-pink{background:rgba(224,64,251,.2);color:#e040fb}
.badge-orange{background:rgba(255,107,53,.2);color:#ff6b35}
.badge-green{background:rgba(34,197,94,.2);color:#22c55e}
.steps{display:flex;flex-direction:column;gap:16px;counter-reset:step}
.step-item{display:flex;gap:16px;align-items:flex-start;counter-increment:step}
.step-num{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--secondary));display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px;color:#fff;flex-shrink:0}
.step-body h4{font-size:15px;font-weight:700;margin-bottom:4px}
.step-body p{font-size:13px;color:var(--text-muted)}
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--border)}
th{background:rgba(92,26,220,.1);font-weight:700;color:var(--text)}
td{color:var(--text-muted)}
tr:hover td{background:rgba(92,26,220,.05)}
.two-col-layout{display:grid;grid-template-columns:2fr 1fr;gap:32px}
.article-header{margin-bottom:24px}
.article-header h1{font-size:clamp(1.4rem,3vw,2rem);font-weight:800;margin:12px 0;line-height:1.3}
.article-meta{display:flex;gap:16px;font-size:13px;color:var(--text-muted);flex-wrap:wrap}
.article-thumb{border-radius:var(--radius);overflow:hidden;margin-bottom:24px;aspect-ratio:16/9}
.article-thumb img{width:100%;height:100%;object-fit:cover}
.article-body{color:var(--text-muted);line-height:1.9;font-size:15px}
.article-body h2{font-size:1.2rem;font-weight:800;color:var(--text);margin:24px 0 12px;padding-left:12px;border-left:3px solid var(--secondary)}
.article-body p{margin-bottom:16px}
.article-body ul,.article-body ol{padding-left:20px;margin-bottom:16px}
.article-body li{margin-bottom:8px}
@media(max-width:900px){.two-col-layout{grid-template-columns:1fr}}
.sidebar-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:20px}
.sidebar-card h4{font-size:15px;font-weight:700;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--border)}
.sidebar-list li{padding:8px 0;border-bottom:1px solid var(--border);font-size:14px}
.sidebar-list li:last-child{border:none}
.sidebar-list li a{color:var(--text-muted)}
.sidebar-list li a:hover{color:var(--text)}