/* ============================================
   海角社区 影视传媒 - 原创样式表
   配色方案：影视红 #E63946 / 深蓝 #1D3557 / 暖橙 #F4A261 / 暗黑 #0D1117
   ============================================ */

/* === Reset & Base === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;background:#0D1117;color:#F0F6FC;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:#F0F6FC}

/* === Layout Container === */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:60px 0}
.section-title{font-size:1.8rem;text-align:center;margin-bottom:12px;position:relative}
.section-title::after{content:"";display:block;width:60px;height:3px;background:linear-gradient(90deg,#E63946,#F4A261);margin:12px auto 0}
.section-desc{text-align:center;color:#8B949E;margin-bottom:40px;font-size:.95rem}

/* === Header / Navigation === */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(13,17,23,.92);backdrop-filter:blur(12px);border-bottom:1px solid rgba(230,57,70,.15);transition:background .3s}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;max-width:1200px;margin:0 auto;padding:0 20px}
.logo{display:flex;align-items:center;gap:4px}
.logo img{height:40px;width:auto}
.nav-list{display:flex;gap:24px;align-items:center}
.nav-list a{color:#C9D1D9;font-size:.9rem;font-weight:500;padding:6px 0;position:relative;transition:color .3s}
.nav-list a::after{content:"";position:absolute;bottom:0;left:0;width:0;height:2px;background:#E63946;transition:width .3s}
.nav-list a:hover,.nav-list a.active{color:#F0F6FC}
.nav-list a:hover::after,.nav-list a.active::after{width:100%}
.mobile-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.mobile-toggle span{width:24px;height:2px;background:#F0F6FC;transition:transform .3s}

/* === Search Bar === */
.search-bar{background:rgba(22,27,34,.9);padding:16px 0;border-bottom:1px solid #21262D}
.search-wrap{max-width:640px;margin:0 auto;position:relative;display:flex;align-items:center}
.search-wrap input{width:100%;padding:10px 44px 10px 16px;border:1px solid #30363D;border-radius:8px;background:#0D1117;color:#F0F6FC;font-size:.9rem;outline:none;transition:border-color .3s}
.search-wrap input:focus{border-color:#E63946}
.search-wrap input::placeholder{color:#484F58}
.search-btn{position:absolute;right:8px;top:50%;transform:translateY(-50%);background:linear-gradient(135deg,#E63946,#c62828);border:none;color:#fff;width:32px;height:32px;border-radius:6px;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1rem}

/* === Hero Banner === */
.hero{position:relative;height:520px;overflow:hidden;margin-top:64px}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.55)}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,17,23,.3) 0%,rgba(13,17,23,.85) 100%)}
.hero-content{position:relative;z-index:2;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:0 20px}
.hero h1{font-size:2.8rem;margin-bottom:12px;text-shadow:0 2px 20px rgba(0,0,0,.5)}
.hero h1 .brand-red{color:#E63946}
.hero p{font-size:1.1rem;color:#C9D1D9;max-width:600px;margin-bottom:24px}
.hero-tags{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.hero-tag{padding:6px 16px;border-radius:20px;background:rgba(230,57,70,.15);border:1px solid rgba(230,57,70,.3);color:#E63946;font-size:.82rem;font-weight:500}

/* === Video Card Grid === */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.video-card{background:#161B22;border-radius:12px;overflow:hidden;border:1px solid #21262D;transition:transform .3s,box-shadow .3s}
.video-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(230,57,70,.12)}
.video-thumb{position:relative;aspect-ratio:16/9;overflow:hidden}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .video-thumb img{transform:scale(1.05)}
.play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:48px;height:48px;background:rgba(230,57,70,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;pointer-events:none}
.play-btn::after{content:"";width:0;height:0;border-left:16px solid #fff;border-top:10px solid transparent;border-bottom:10px solid transparent;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}
.video-info{padding:12px}
.video-info h3{font-size:.9rem;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;gap:12px;color:#8B949E;font-size:.78rem}
.video-meta span{display:flex;align-items:center;gap:3px}

/* === Service Modules === */
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.service-card{background:#161B22;border-radius:12px;padding:28px;border:1px solid #21262D;text-align:center;transition:border-color .3s,transform .3s}
.service-card:hover{border-color:#E63946;transform:translateY(-3px)}
.service-icon{width:56px;height:56px;margin:0 auto 16px;background:linear-gradient(135deg,#E63946,#F4A261);border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.5rem}
.service-card h3{font-size:1rem;margin-bottom:8px}
.service-card p{color:#8B949E;font-size:.85rem;line-height:1.6}

/* === AI Feature Section === */
.ai-section{background:linear-gradient(135deg,rgba(29,53,87,.3),rgba(13,17,23,1));position:relative;overflow:hidden}
.ai-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.ai-img{border-radius:16px;overflow:hidden;border:1px solid #21262D}
.ai-img img{width:100%;display:block}
.ai-features{display:flex;flex-direction:column;gap:20px}
.ai-item{display:flex;gap:16px;align-items:flex-start}
.ai-dot{width:10px;height:10px;border-radius:50%;background:#E63946;margin-top:6px;flex-shrink:0}
.ai-item h4{font-size:.95rem;margin-bottom:4px}
.ai-item p{color:#8B949E;font-size:.85rem}

/* === Community Section === */
.community-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.community-card{background:#161B22;border-radius:10px;padding:20px;text-align:center;border:1px solid #21262D;transition:border-color .3s}
.community-card:hover{border-color:#F4A261}
.community-icon{font-size:2rem;margin-bottom:10px}
.community-card h4{font-size:.9rem;margin-bottom:6px}
.community-card p{color:#8B949E;font-size:.8rem}

/* === Expert Section === */
.expert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.expert-card{background:#161B22;border-radius:12px;overflow:hidden;border:1px solid #21262D;text-align:center;transition:transform .3s}
.expert-card:hover{transform:translateY(-3px)}
.expert-avatar{width:100px;height:100px;border-radius:50%;margin:24px auto 12px;overflow:hidden;border:3px solid #E63946}
.expert-avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h4{font-size:.95rem;margin-bottom:4px}
.expert-role{color:#F4A261;font-size:.8rem;margin-bottom:8px}
.expert-desc{color:#8B949E;font-size:.82rem;padding:0 16px;margin-bottom:16px}
.expert-btns{display:flex;gap:8px;justify-content:center;padding:0 16px 20px}
.btn-sm{padding:6px 14px;border-radius:6px;font-size:.78rem;font-weight:500;cursor:pointer;border:none;transition:background .3s}
.btn-primary{background:#E63946;color:#fff}
.btn-primary:hover{background:#c62828;color:#fff}
.btn-outline{background:transparent;border:1px solid #30363D;color:#C9D1D9}
.btn-outline:hover{border-color:#E63946;color:#E63946}

/* === Partner Logo Wall === */
.partner-grid{display:flex;flex-wrap:wrap;gap:24px;justify-content:center;align-items:center}
.partner-item{background:#161B22;border:1px solid #21262D;border-radius:10px;padding:16px 28px;color:#8B949E;font-size:.9rem;font-weight:600;transition:border-color .3s}
.partner-item:hover{border-color:#F4A261;color:#F4A261}

/* === Reviews === */
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.review-card{background:#161B22;border-radius:12px;padding:24px;border:1px solid #21262D}
.review-stars{color:#F4A261;margin-bottom:8px;font-size:.9rem;letter-spacing:2px}
.review-text{color:#C9D1D9;font-size:.88rem;line-height:1.7;margin-bottom:12px;font-style:italic}
.review-author{display:flex;align-items:center;gap:10px}
.review-avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,#E63946,#F4A261);display:flex;align-items:center;justify-content:center;color:#fff;font-size:.8rem;font-weight:700}
.review-name{font-size:.82rem;color:#F0F6FC}
.review-date{font-size:.75rem;color:#8B949E}

/* === FAQ === */
.faq-list{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:#161B22;border:1px solid #21262D;border-radius:10px;overflow:hidden}
.faq-q{padding:16px 20px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:.92rem;transition:background .3s}
.faq-q:hover{background:#1C2128}
.faq-arrow{transition:transform .3s;color:#E63946;font-size:1.2rem}
.faq-item.open .faq-arrow{transform:rotate(180deg)}
.faq-a{padding:0 20px;max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s ease;color:#8B949E;font-size:.88rem;line-height:1.7}
.faq-item.open .faq-a{max-height:300px;padding:0 20px 16px}

/* === Contact Section === */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-info{display:flex;flex-direction:column;gap:16px}
.contact-item{display:flex;gap:12px;align-items:flex-start}
.contact-icon{width:40px;height:40px;border-radius:8px;background:rgba(230,57,70,.12);display:flex;align-items:center;justify-content:center;color:#E63946;font-size:1.1rem;flex-shrink:0}
.contact-item h4{font-size:.9rem;margin-bottom:2px}
.contact-item p{color:#8B949E;font-size:.85rem}
.contact-qr{display:flex;gap:24px;justify-content:center}
.qr-item{text-align:center}
.qr-item img{width:140px;height:140px;border-radius:8px;border:1px solid #21262D;margin-bottom:8px}
.qr-item p{color:#8B949E;font-size:.8rem}

/* === How-To Guide === */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:24px}
.howto-step{text-align:center;position:relative}
.step-num{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#E63946,#F4A261);display:flex;align-items:center;justify-content:center;margin:0 auto 12px;font-weight:700;font-size:1.1rem}
.howto-step h4{font-size:.9rem;margin-bottom:6px}
.howto-step p{color:#8B949E;font-size:.82rem}

/* === Share Buttons === */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:20px}
.share-btn{padding:8px 18px;border-radius:8px;font-size:.82rem;font-weight:500;cursor:pointer;border:none;color:#fff;transition:transform .2s,opacity .2s}
.share-btn:hover{transform:scale(1.05);opacity:.9;color:#fff}
.share-wechat{background:#07C160}
.share-weibo{background:#E6162D}
.share-douyin{background:#161823}
.share-bilibili{background:#00A1D6}

/* === Footer === */
.site-footer{background:#0A0E14;border-top:1px solid #21262D;padding:40px 0 20px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px}
.footer-brand p{color:#8B949E;font-size:.85rem;margin-top:12px;line-height:1.6}
.footer-col h4{font-size:.9rem;margin-bottom:14px;color:#F0F6FC;position:relative;padding-bottom:8px}
.footer-col h4::after{content:"";position:absolute;bottom:0;left:0;width:24px;height:2px;background:#E63946}
.footer-col a{display:block;color:#8B949E;font-size:.82rem;padding:4px 0;transition:color .3s}
.footer-col a:hover{color:#F4A261}
.footer-bottom{border-top:1px solid #21262D;padding-top:20px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.footer-bottom p{color:#484F58;font-size:.8rem}
.footer-update{color:#8B949E;font-size:.78rem}

/* === Breadcrumb === */
.breadcrumb{padding:12px 0;font-size:.82rem;color:#8B949E}
.breadcrumb a{color:#8B949E}
.breadcrumb a:hover{color:#E63946}
.breadcrumb span{color:#484F58;margin:0 6px}

/* === Inner Page === */
.page-hero{height:280px;position:relative;margin-top:64px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.page-hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.35)}
.page-hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,17,23,.2),rgba(13,17,23,.9))}
.page-hero-content{position:relative;z-index:2;text-align:center}
.page-hero h1{font-size:2rem;margin-bottom:8px}
.page-content{padding:40px 0 60px}

/* === Responsive === */
@media(max-width:1024px){
  .video-grid{grid-template-columns:repeat(3,1fr)}
  .service-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .ai-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .video-grid{grid-template-columns:repeat(2,1fr)}
  .nav-list{display:none;position:absolute;top:64px;left:0;width:100%;background:#0D1117;flex-direction:column;padding:20px;gap:16px;border-bottom:1px solid #21262D}
  .nav-list.open{display:flex}
  .mobile-toggle{display:flex}
  .hero{height:400px}
  .hero h1{font-size:1.8rem}
  .contact-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .community-grid{grid-template-columns:repeat(2,1fr)}
  .howto-steps{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;text-align:center}
  .section{padding:40px 0}
  .section-title{font-size:1.4rem}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .service-grid{grid-template-columns:1fr}
  .community-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .howto-steps{grid-template-columns:1fr}
  .hero h1{font-size:1.4rem}
}

/* === Image Load Effect === */
img{transition:opacity .4s}
img.loaded{opacity:1}

/* === MCP Frontend Placeholder === */
.mcp-widget{background:#161B22;border:1px solid #21262D;border-radius:10px;padding:20px;margin-top:20px;text-align:center}
.mcp-widget p{color:#8B949E;font-size:.85rem}

/* === Scrollbar === */
::-webkit-scrollbar{width:8px}
::-webkit-scrollbar-track{background:#0D1117}
::-webkit-scrollbar-thumb{background:#30363D;border-radius:4px}
::-webkit-scrollbar-thumb:hover{background:#484F58}

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

/* === Video Tag Badges === */
.tag-badge{display:inline-block;padding:3px 10px;border-radius:4px;font-size:.72rem;font-weight:600;margin-right:4px}
.tag-video{background:rgba(230,57,70,.15);color:#E63946}
.tag-hot{background:rgba(244,162,97,.15);color:#F4A261}
.tag-new{background:rgba(0,200,83,.15);color:#00C853}
.tag-live{background:rgba(156,39,176,.15);color:#CE93D8}