/* =============================================
   开云体育 - 原创样式表
   配色方案：深邃靛蓝 + 活力红 + 暖橙
   ============================================= */

/* CSS 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;background:#0d1117;color:#e8e8e8;line-height:1.7;overflow-x:hidden}
a{color:#f4a261;text-decoration:none;transition:color .3s}
a:hover{color:#e63946}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.3;color:#fff}
h1{font-size:2.4rem;margin-bottom:1rem}
h2{font-size:1.9rem;margin-bottom:.8rem}
h3{font-size:1.5rem;margin-bottom:.6rem}
h4{font-size:1.2rem;margin-bottom:.5rem}
p{margin-bottom:1rem;color:#c0c0c0}

/* Container */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section-padding{padding:60px 0}

/* ===================== Header ===================== */
.site-header{background:linear-gradient(180deg,#0f1420 0%,#1a1f3a 100%);position:sticky;top:0;z-index:1000;border-bottom:2px solid #e63946;box-shadow:0 2px 20px rgba(230,57,70,.15)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;max-width:1200px;margin:0 auto}
.site-logo{display:flex;align-items:center;gap:10px}
.site-logo img{height:42px;width:auto}
.site-logo span{font-size:1.3rem;font-weight:800;color:#fff;letter-spacing:1px}

/* Navigation */
.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{display:block;padding:12px 16px;color:#c0c0c0;font-size:.92rem;font-weight:500;transition:all .3s;position:relative}
.main-nav a::after{content:"";position:absolute;bottom:0;left:50%;width:0;height:2px;background:#e63946;transition:all .3s;transform:translateX(-50%)}
.main-nav a:hover,.main-nav a.active{color:#fff}
.main-nav a:hover::after,.main-nav a.active::after{width:70%}
.mobile-toggle{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* Search Bar */
.search-bar{background:#161b2e;padding:15px 0;border-bottom:1px solid rgba(255,255,255,.05)}
.search-bar .container{display:flex;justify-content:center}
.search-form{display:flex;max-width:600px;width:100%}
.search-form input{flex:1;padding:10px 18px;background:#0d1117;border:1px solid #2a3050;border-right:none;border-radius:6px 0 0 6px;color:#e8e8e8;font-size:.95rem;outline:none;transition:border-color .3s}
.search-form input:focus{border-color:#e63946}
.search-form button{padding:10px 24px;background:#e63946;color:#fff;border:none;border-radius:0 6px 6px 0;cursor:pointer;font-size:.95rem;transition:background .3s}
.search-form button:hover{background:#c5303d}

/* ===================== Banner ===================== */
.hero-banner{position:relative;height:520px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.hero-banner .banner-bg{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;filter:brightness(.55)}
.hero-content{position:relative;z-index:2;text-align:center;max-width:800px;padding:0 20px}
.hero-content h1{font-size:2.8rem;text-shadow:0 2px 20px rgba(0,0,0,.7);margin-bottom:16px}
.hero-content h1 span{color:#e63946}
.hero-content p{font-size:1.15rem;color:#ddd;text-shadow:0 1px 10px rgba(0,0,0,.5);margin-bottom:24px}
.hero-content .hero-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.hero-content .hero-tags span{background:rgba(230,57,70,.2);border:1px solid rgba(230,57,70,.4);padding:5px 16px;border-radius:20px;font-size:.85rem;color:#f4a261}

/* ===================== Section Titles ===================== */
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{display:inline-block;position:relative;padding-bottom:12px}
.section-title h2::after{content:"";position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:60px;height:3px;background:linear-gradient(90deg,#e63946,#f4a261);border-radius:2px}
.section-title p{color:#888;margin-top:10px;font-size:.95rem}

/* ===================== Video Cards ===================== */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.video-card{background:#161b2e;border-radius:10px;overflow:hidden;transition:transform .3s,box-shadow .3s;cursor:pointer}
.video-card:hover{transform:translateY(-5px);box-shadow:0 8px 30px rgba(230,57,70,.15)}
.video-card .thumb{position:relative;overflow:hidden;aspect-ratio:4/3}
.video-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .thumb img{transform:scale(1.05)}
.video-card .play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:56px;height:56px;background:rgba(230,57,70,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s}
.video-card:hover .play-btn{opacity:1}
.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 .card-info{padding:14px 16px}
.video-card .card-info h4{font-size:.95rem;margin-bottom:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.video-card .card-info .meta{display:flex;gap:12px;font-size:.8rem;color:#888}
.video-card .card-info .meta span{display:flex;align-items:center;gap:4px}
.video-card .duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);padding:2px 8px;border-radius:3px;font-size:.75rem;color:#fff}

/* ===================== Module Cards ===================== */
.module-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.module-card{background:linear-gradient(145deg,#161b2e 0%,#1e2440 100%);border-radius:12px;padding:30px 24px;text-align:center;transition:transform .3s,box-shadow .3s;border:1px solid rgba(255,255,255,.05)}
.module-card:hover{transform:translateY(-4px);box-shadow:0 6px 25px rgba(230,57,70,.1);border-color:rgba(230,57,70,.2)}
.module-card .icon{width:60px;height:60px;margin:0 auto 16px;background:linear-gradient(135deg,#e63946,#f4a261);border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.6rem}
.module-card h4{margin-bottom:8px}
.module-card p{font-size:.88rem;color:#999}

/* ===================== Expert Section ===================== */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.expert-card{background:#161b2e;border-radius:12px;overflow:hidden;text-align:center;transition:transform .3s;border:1px solid rgba(255,255,255,.05)}
.expert-card:hover{transform:translateY(-4px);border-color:rgba(244,162,97,.3)}
.expert-card .avatar{width:100%;aspect-ratio:1;overflow:hidden}
.expert-card .avatar img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.expert-card:hover .avatar img{transform:scale(1.05)}
.expert-card .info{padding:18px 14px}
.expert-card .info h4{margin-bottom:4px}
.expert-card .info .role{color:#f4a261;font-size:.85rem;margin-bottom:8px}
.expert-card .info p{font-size:.82rem;color:#999;margin-bottom:12px}
.expert-card .btns{display:flex;gap:8px;justify-content:center;padding:0 14px 18px}
.expert-card .btns a{padding:6px 14px;border-radius:5px;font-size:.8rem;border:1px solid #e63946;color:#e63946;transition:all .3s}
.expert-card .btns a:hover{background:#e63946;color:#fff}

/* ===================== FAQ ===================== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#161b2e;border-radius:8px;margin-bottom:12px;overflow:hidden;border:1px solid rgba(255,255,255,.05)}
.faq-item .faq-q{padding:16px 20px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;transition:background .3s}
.faq-item .faq-q:hover{background:#1e2440}
.faq-item .faq-q .arrow{transition:transform .3s;color:#e63946;font-size:1.2rem}
.faq-item.open .faq-q .arrow{transform:rotate(180deg)}
.faq-item .faq-a{padding:0 20px;max-height:0;overflow:hidden;transition:all .4s;color:#aaa;font-size:.92rem}
.faq-item.open .faq-a{padding:0 20px 16px;max-height:500px}

/* ===================== Reviews ===================== */
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.review-card{background:#161b2e;border-radius:10px;padding:24px;border:1px solid rgba(255,255,255,.05)}
.review-card .stars{color:#f4a261;margin-bottom:10px;font-size:1.1rem;letter-spacing:2px}
.review-card .text{font-size:.92rem;color:#bbb;margin-bottom:14px;font-style:italic}
.review-card .author{display:flex;align-items:center;gap:10px}
.review-card .author .avatar-sm{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,#e63946,#f4a261);display:flex;align-items:center;justify-content:center;font-size:.85rem;color:#fff;font-weight:700}
.review-card .author .name{font-weight:600;font-size:.9rem}
.review-card .author .date{font-size:.78rem;color:#777}

/* ===================== Contact ===================== */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px;align-items:start}
.contact-info{background:#161b2e;border-radius:12px;padding:30px;border:1px solid rgba(255,255,255,.05)}
.contact-info h3{margin-bottom:20px;color:#f4a261}
.contact-info .item{display:flex;gap:12px;margin-bottom:16px;align-items:flex-start}
.contact-info .item .label{color:#888;min-width:80px;font-size:.9rem}
.contact-info .item .value{color:#ddd;font-size:.9rem}
.contact-qr{display:flex;gap:30px;justify-content:center}
.contact-qr .qr-item{text-align:center}
.contact-qr .qr-item img{width:160px;height:160px;border-radius:8px;margin-bottom:8px}
.contact-qr .qr-item p{font-size:.85rem;color:#999}

/* ===================== Community ===================== */
.community-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.community-card{background:#161b2e;border-radius:10px;overflow:hidden;transition:transform .3s}
.community-card:hover{transform:translateY(-4px)}
.community-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden}
.community-card .thumb img{width:100%;height:100%;object-fit:cover}
.community-card .info{padding:14px 16px}
.community-card .info h4{margin-bottom:6px;font-size:.95rem}
.community-card .info p{font-size:.82rem;color:#999}

/* ===================== Share Buttons ===================== */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:20px}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:6px;font-size:.85rem;color:#fff;transition:opacity .3s;cursor:pointer}
.share-btn:hover{opacity:.85;color:#fff}
.share-btn.wechat{background:#07c160}
.share-btn.weibo{background:#e6162d}
.share-btn.douyin{background:#161823}
.share-btn.bilibili{background:#00a1d6}

/* ===================== Footer ===================== */
.site-footer{background:linear-gradient(180deg,#0f1420 0%,#080b12 100%);border-top:2px solid #1a1f3a;padding:40px 0 0}
.footer-top{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.05)}
.footer-col h4{color:#f4a261;margin-bottom:16px;font-size:1rem}
.footer-col a{display:block;color:#888;font-size:.88rem;padding:4px 0;transition:color .3s}
.footer-col a:hover{color:#e63946}
.footer-col p{font-size:.85rem;color:#777}
.footer-bottom{text-align:center;padding:20px 0;color:#555;font-size:.82rem}
.footer-bottom .update-time{color:#777;margin-top:6px}
.footer-logo{display:flex;align-items:center;gap:8px;margin-bottom:12px}
.footer-logo img{height:32px}
.footer-logo span{font-size:1.1rem;font-weight:700;color:#fff}

/* ===================== Breadcrumb ===================== */
.breadcrumb{padding:12px 0;font-size:.85rem;color:#777}
.breadcrumb a{color:#f4a261}
.breadcrumb span{margin:0 6px;color:#555}

/* ===================== Inner Page ===================== */
.page-hero{height:280px;position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden}
.page-hero .banner-bg{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;filter:brightness(.4)}
.page-hero .hero-content{position:relative;z-index:2;text-align:center}
.page-hero .hero-content h1{font-size:2.2rem}

.content-section{padding:40px 0}
.content-section article{background:#161b2e;border-radius:12px;padding:30px;margin-bottom:24px;border:1px solid rgba(255,255,255,.05)}
.content-section article h2{color:#f4a261;margin-bottom:16px}
.content-section article h3{color:#e63946;margin-bottom:12px}

/* ===================== How-To Guide ===================== */
.howto-steps{counter-reset:step}
.howto-step{display:flex;gap:20px;margin-bottom:24px;align-items:flex-start}
.howto-step .step-num{counter-increment:step;flex-shrink:0;width:48px;height:48px;background:linear-gradient(135deg,#e63946,#f4a261);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.2rem;font-weight:700;color:#fff}
.howto-step .step-num::before{content:counter(step)}
.howto-step .step-content h4{margin-bottom:6px}
.howto-step .step-content p{font-size:.9rem;color:#aaa}

/* ===================== Partner Logos ===================== */
.partner-wall{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;padding:20px 0}
.partner-item{width:120px;height:60px;background:#1e2440;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#555;font-size:.8rem;border:1px solid rgba(255,255,255,.05);transition:border-color .3s}
.partner-item:hover{border-color:#f4a261}

/* ===================== Responsive ===================== */
@media(max-width:1024px){
  .video-grid{grid-template-columns:repeat(3,1fr)}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .main-nav{display:none;position:absolute;top:100%;left:0;right:0;background:#1a1f3a;flex-direction:column;padding:10px 0;border-bottom:2px solid #e63946}
  .main-nav.open{display:flex}
  .mobile-toggle{display:block}
  .hero-banner{height:380px}
  .hero-content h1{font-size:1.8rem}
  .video-grid{grid-template-columns:repeat(2,1fr)}
  .module-grid{grid-template-columns:repeat(2,1fr)}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .review-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .community-grid{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:1fr}
  .section-padding{padding:40px 0}
  h1{font-size:1.8rem}
  h2{font-size:1.5rem}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .module-grid{grid-template-columns:1fr}
  .community-grid{grid-template-columns:1fr}
  .contact-qr{flex-direction:column;align-items:center}
  .hero-banner{height:300px}
  .hero-content h1{font-size:1.5rem}
}

/* ===================== Lazy Load ===================== */
img[data-src]{opacity:0;transition:opacity .5s}
img.loaded{opacity:1}

/* ===================== Animations ===================== */
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.fade-in{animation:fadeInUp .6s ease forwards}

/* ===================== MCP Widget ===================== */
.mcp-widget{background:#161b2e;border-radius:10px;padding:20px;margin-top:20px;border:1px solid rgba(255,255,255,.05)}
.mcp-widget h4{color:#f4a261;margin-bottom:12px}
.mcp-widget .mcp-input{display:flex;gap:10px}
.mcp-widget .mcp-input input{flex:1;padding:8px 14px;background:#0d1117;border:1px solid #2a3050;border-radius:6px;color:#e8e8e8;font-size:.9rem}
.mcp-widget .mcp-input button{padding:8px 18px;background:#e63946;color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:.9rem}

/* ===================== Tag Badge (视频卡片角标) ===================== */
.tag-badge{position:absolute;top:8px;left:8px;background:rgba(230,57,70,.9);padding:3px 10px;border-radius:3px;font-size:.72rem;color:#fff;font-weight:600;letter-spacing:.5px}

/* ===================== Card Tags (卡片底部标签) ===================== */
.card-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.card-tags span{background:rgba(244,162,97,.12);border:1px solid rgba(244,162,97,.25);padding:2px 10px;border-radius:12px;font-size:.72rem;color:#f4a261}

/* ===================== Tag Cloud (标签云) ===================== */
.tag-cloud{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;padding:20px 0}
.tag-item{display:inline-block;padding:8px 20px;background:rgba(230,57,70,.1);border:1px solid rgba(230,57,70,.3);border-radius:25px;color:#f4a261;font-size:.9rem;transition:all .3s;text-decoration:none}
.tag-item:hover{background:rgba(230,57,70,.25);border-color:#e63946;color:#fff;transform:translateY(-2px)}
.tag-item.tag-lg{font-size:1rem;padding:10px 24px;font-weight:600}
.tag-item.tag-sm{font-size:.8rem;padding:6px 14px}

/* ===================== Article Content (文章内容) ===================== */
.article-content{background:#161b2e;border-radius:12px;padding:36px;border:1px solid rgba(255,255,255,.05);line-height:1.9}
.article-content h3{color:#e63946;margin-top:24px;margin-bottom:12px;font-size:1.25rem}
.article-content p{color:#c0c0c0;margin-bottom:16px;text-indent:2em}

/* ===================== Page Hero (内页头图) ===================== */
.page-hero{position:relative;height:280px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.page-hero .banner-bg{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;filter:brightness(.4)}
.page-hero .hero-content{position:relative;z-index:2;text-align:center;padding:0 20px}
.page-hero .hero-content h1{font-size:2rem;text-shadow:0 2px 10px rgba(0,0,0,.5)}
.page-hero .hero-content p{color:#ddd;font-size:1.05rem}

/* ===================== Breadcrumb (面包屑) ===================== */
.breadcrumb{padding:16px 0;font-size:.88rem;color:#888}
.breadcrumb a{color:#f4a261}
.breadcrumb a:hover{color:#e63946}
.breadcrumb span{margin:0 8px;color:#555}
.breadcrumb strong{color:#e8e8e8}

/* ===================== HowTo Steps (步骤) ===================== */
.howto-steps{display:flex;flex-direction:column;gap:20px}
.howto-step{display:flex;gap:16px;align-items:flex-start}
.step-num{width:36px;height:36px;min-width:36px;background:#e63946;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;color:#fff;font-size:.9rem}
.step-content h4{color:#f4a261;margin-bottom:4px}
.step-content p{color:#c0c0c0;font-size:.9rem;margin-bottom:0}

/* ===================== Update Time (更新时间) ===================== */
.update-time{color:#666;font-size:.82rem;margin-top:6px}

/* ===================== Video Player (视频播放器) ===================== */
.video-player-wrap{display:flex;gap:20px;margin-top:30px;flex-wrap:wrap}
.main-video-player{flex:2;min-width:300px;position:relative;background:#000;border-radius:10px;overflow:hidden}
.main-video-player video{width:100%;display:block;border-radius:10px;aspect-ratio:16/9;background:#000}
.video-title-overlay{position:absolute;bottom:0;left:0;right:0;padding:12px 16px;background:linear-gradient(transparent,rgba(0,0,0,.85));color:#fff;font-size:.95rem;font-weight:600}
.video-playlist{flex:1;min-width:260px;max-height:420px;overflow-y:auto;background:#161b2e;border-radius:10px;padding:10px}
.video-playlist h4{padding:8px 12px;color:#f4a261;font-size:.95rem;margin-bottom:6px;border-bottom:1px solid rgba(255,255,255,.05)}
.playlist-item{display:flex;gap:10px;padding:8px 10px;border-radius:8px;cursor:pointer;transition:background .3s;align-items:center}
.playlist-item:hover{background:rgba(230,57,70,.1)}
.playlist-item.active{background:rgba(230,57,70,.15);border-left:3px solid #e63946}
.playlist-item img{width:90px;height:60px;object-fit:cover;border-radius:6px;flex-shrink:0}
.playlist-item .pl-info{flex:1;min-width:0}
.playlist-item .pl-info h5{font-size:.82rem;color:#e8e8e8;margin-bottom:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:500}
.playlist-item .pl-info span{font-size:.72rem;color:#888}

/* ===================== Module Grid (模块网格) ===================== */
.module-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.module-card{background:#161b2e;border-radius:12px;padding:28px 24px;text-align:center;border:1px solid rgba(255,255,255,.05);transition:transform .3s,box-shadow .3s}
.module-card:hover{transform:translateY(-5px);box-shadow:0 8px 30px rgba(230,57,70,.1)}
.module-card .icon{font-size:2.5rem;margin-bottom:14px}
.module-card h4{color:#f4a261;margin-bottom:10px}
.module-card p{color:#c0c0c0;font-size:.88rem;line-height:1.6}

/* ===================== Responsive Video Player ===================== */
@media(max-width:768px){
  .video-player-wrap{flex-direction:column}
  .video-playlist{max-height:260px}
  .main-video-player{min-width:100%}
}