/* ============================================
   国产 全站样式表
   品牌色系：金色 #D4A843 / 深紫 #2D1B4E / 玫红 #E8547C / 暗色 #1A1128
   ============================================ */

/* CSS Reset & Base */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;color:#e0d8f0;background:#1A1128;line-height:1.7;overflow-x:hidden}
a{color:#D4A843;text-decoration:none;transition:color .3s}
a:hover{color:#E8547C}
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}

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

/* ============ Header / Navigation ============ */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(26,17,40,.95);backdrop-filter:blur(10px);border-bottom:1px solid rgba(212,168,67,.2);transition:background .3s}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;max-width:1200px;margin:0 auto}
.logo-wrap{display:flex;align-items:center;gap:10px}
.logo-wrap img{height:42px;width:auto}
.logo-wrap span{font-size:1.3rem;font-weight:700;color:#D4A843;letter-spacing:1px}
.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{padding:12px 16px;font-size:.95rem;color:#ccc;transition:all .3s;position:relative}
.main-nav a:hover,.main-nav a.active{color:#D4A843}
.main-nav a::after{content:'';position:absolute;bottom:6px;left:50%;transform:translateX(-50%);width:0;height:2px;background:linear-gradient(90deg,#D4A843,#E8547C);transition:width .3s}
.main-nav a:hover::after,.main-nav a.active::after{width:60%}
.mobile-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.mobile-toggle span{width:24px;height:2px;background:#D4A843;transition:all .3s}

/* Search Box */
.search-bar{background:rgba(45,27,78,.6);padding:12px 0;border-bottom:1px solid rgba(212,168,67,.1)}
.search-bar .container{display:flex;justify-content:center}
.search-box{display:flex;max-width:560px;width:100%}
.search-box input{flex:1;padding:10px 18px;border:1px solid rgba(212,168,67,.3);border-right:none;border-radius:25px 0 0 25px;background:rgba(26,17,40,.8);color:#e0d8f0;font-size:.95rem;outline:none;transition:border-color .3s}
.search-box input:focus{border-color:#D4A843}
.search-box button{padding:10px 24px;background:linear-gradient(135deg,#D4A843,#E8547C);border:none;border-radius:0 25px 25px 0;color:#fff;font-size:.95rem;cursor:pointer;transition:opacity .3s}
.search-box button:hover{opacity:.85}

/* ============ Hero Banner ============ */
.hero-banner{position:relative;height:520px;overflow:hidden;margin-top:62px}
.hero-banner img{width:100%;height:100%;object-fit:cover}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(26,17,40,.3) 0%,rgba(26,17,40,.85) 100%);display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:20px}
.hero-overlay h1{font-size:2.6rem;margin-bottom:12px;background:linear-gradient(90deg,#D4A843,#E8547C);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-overlay p{font-size:1.15rem;max-width:680px;color:#ccc;margin-bottom:20px}
.hero-overlay .hero-tags{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.hero-overlay .hero-tags span{padding:6px 16px;background:rgba(212,168,67,.15);border:1px solid rgba(212,168,67,.3);border-radius:20px;font-size:.85rem;color:#D4A843}

/* ============ Section Common ============ */
.section{padding:60px 0}
.section-alt{background:rgba(45,27,78,.25)}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:2rem;margin-bottom:8px;position:relative;display:inline-block}
.section-title h2::after{content:'';display:block;width:60px;height:3px;background:linear-gradient(90deg,#D4A843,#E8547C);margin:10px auto 0}
.section-title p{color:#999;font-size:.95rem;margin-top:8px}

/* ============ Video Cards Grid ============ */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{background:rgba(45,27,78,.4);border-radius:12px;overflow:hidden;border:1px solid rgba(212,168,67,.1);transition:transform .3s,box-shadow .3s}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 30px rgba(212,168,67,.15)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden}
.video-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .video-thumb img{transform:scale(1.05)}
.play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;background:rgba(0,0,0,.4)}
.video-card:hover .play-btn{opacity:1}
.play-btn svg{width:56px;height:56px;fill:#D4A843;filter:drop-shadow(0 2px 8px rgba(0,0,0,.5))}
.video-info{padding:16px}
.video-info h3{font-size:1.05rem;margin-bottom:6px;color:#fff;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-info .meta{display:flex;gap:14px;font-size:.8rem;color:#888}
.video-info .meta span{display:flex;align-items:center;gap:4px}
.video-info .tags{margin-top:8px;display:flex;gap:6px;flex-wrap:wrap}
.video-info .tags span{font-size:.75rem;padding:2px 10px;background:rgba(212,168,67,.1);border-radius:12px;color:#D4A843}

/* ============ Feature Modules ============ */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.feature-card{background:rgba(45,27,78,.35);border:1px solid rgba(212,168,67,.1);border-radius:12px;padding:28px 24px;text-align:center;transition:transform .3s,border-color .3s}
.feature-card:hover{transform:translateY(-4px);border-color:rgba(212,168,67,.4)}
.feature-card .icon{font-size:2.4rem;margin-bottom:14px}
.feature-card h4{font-size:1.1rem;margin-bottom:8px;color:#D4A843}
.feature-card p{font-size:.9rem;color:#aaa}

/* ============ Expert Section ============ */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:28px}
.expert-card{background:rgba(45,27,78,.4);border-radius:12px;overflow:hidden;border:1px solid rgba(212,168,67,.1);text-align:center;transition:transform .3s}
.expert-card:hover{transform:translateY(-4px)}
.expert-card .avatar{width:120px;height:120px;border-radius:50%;margin:24px auto 16px;overflow:hidden;border:3px solid #D4A843}
.expert-card .avatar img{width:100%;height:100%;object-fit:cover}
.expert-card h4{font-size:1.05rem;color:#fff;margin-bottom:4px}
.expert-card .role{font-size:.85rem;color:#D4A843;margin-bottom:10px}
.expert-card p{font-size:.85rem;color:#999;padding:0 20px;margin-bottom:16px}
.expert-card .actions{display:flex;justify-content:center;gap:10px;padding-bottom:20px}
.btn-sm{padding:8px 18px;border-radius:20px;font-size:.82rem;border:1px solid #D4A843;color:#D4A843;background:transparent;cursor:pointer;transition:all .3s}
.btn-sm:hover{background:#D4A843;color:#1A1128}
.btn-primary{background:linear-gradient(135deg,#D4A843,#E8547C);color:#fff;border:none}
.btn-primary:hover{opacity:.9;background:linear-gradient(135deg,#D4A843,#E8547C)}

/* ============ FAQ ============ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border:1px solid rgba(212,168,67,.15);border-radius:10px;margin-bottom:12px;overflow:hidden;background:rgba(45,27,78,.3)}
.faq-question{padding:16px 20px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-size:1rem;color:#e0d8f0;transition:background .3s}
.faq-question:hover{background:rgba(212,168,67,.08)}
.faq-question .arrow{transition:transform .3s;color:#D4A843;font-size:1.2rem}
.faq-item.active .faq-question .arrow{transform:rotate(180deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 20px}
.faq-item.active .faq-answer{max-height:300px;padding:0 20px 16px}
.faq-answer p{font-size:.9rem;color:#aaa;line-height:1.7}

/* ============ Reviews ============ */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.review-card{background:rgba(45,27,78,.4);border:1px solid rgba(212,168,67,.1);border-radius:12px;padding:24px;position:relative}
.review-card .stars{color:#D4A843;font-size:1rem;margin-bottom:10px;letter-spacing:2px}
.review-card blockquote{font-size:.92rem;color:#ccc;font-style:italic;margin-bottom:14px;line-height:1.7}
.review-card .reviewer{display:flex;align-items:center;gap:10px}
.review-card .reviewer .r-avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#D4A843,#E8547C);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.9rem}
.review-card .reviewer .r-info span{display:block}
.review-card .reviewer .r-info .r-name{font-size:.9rem;color:#fff}
.review-card .reviewer .r-info .r-date{font-size:.78rem;color:#888}

/* ============ Contact Section ============ */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:28px}
.contact-card{background:rgba(45,27,78,.4);border:1px solid rgba(212,168,67,.1);border-radius:12px;padding:24px;text-align:center}
.contact-card h4{color:#D4A843;margin-bottom:12px;font-size:1.05rem}
.contact-card p{font-size:.9rem;color:#aaa;margin-bottom:6px}
.contact-card img{max-width:160px;margin:12px auto 0;border-radius:8px}

/* ============ Share Buttons ============ */
.share-bar{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:20px}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 20px;border-radius:20px;font-size:.85rem;color:#fff;border:none;cursor:pointer;transition:opacity .3s}
.share-btn:hover{opacity:.85}
.share-wechat{background:#07C160}
.share-weibo{background:#E6162D}
.share-douyin{background:#161823}
.share-bilibili{background:#00A1D6}

/* ============ Footer ============ */
.site-footer{background:rgba(15,10,28,.95);border-top:1px solid rgba(212,168,67,.15);padding:40px 0 20px}
.footer-top{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:30px;margin-bottom:30px}
.footer-col h5{color:#D4A843;font-size:1rem;margin-bottom:14px}
.footer-col p,.footer-col a{font-size:.88rem;color:#888;display:block;margin-bottom:6px}
.footer-col a:hover{color:#D4A843}
.footer-col .footer-logo{height:36px;margin-bottom:10px}
.footer-qr{display:flex;gap:16px;margin-top:10px}
.footer-qr img{width:100px;border-radius:6px}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid rgba(212,168,67,.1);font-size:.82rem;color:#666}
.footer-bottom p{margin-bottom:4px}

/* ============ Breadcrumb ============ */
.breadcrumb{padding:14px 0;font-size:.85rem;color:#888}
.breadcrumb a{color:#D4A843}
.breadcrumb span{margin:0 6px;color:#555}

/* ============ Inner Page Content ============ */
.page-hero{height:320px;position:relative;overflow:hidden;margin-top:62px}
.page-hero img{width:100%;height:100%;object-fit:cover}
.page-hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(26,17,40,.2),rgba(26,17,40,.9));display:flex;flex-direction:column;justify-content:flex-end;padding:30px}
.page-hero-overlay h1{font-size:2rem;color:#fff}
.page-hero-overlay p{color:#aaa;font-size:.95rem;margin-top:6px}
.page-content{padding:40px 0}
.page-content article{max-width:900px;margin:0 auto}
.page-content article h2{font-size:1.6rem;margin:30px 0 14px;color:#D4A843}
.page-content article h3{font-size:1.3rem;margin:24px 0 10px;color:#e0d8f0}
.page-content article p{font-size:.95rem;color:#bbb;margin-bottom:16px}

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

/* ============ Responsive ============ */
@media(max-width:768px){
  .header-inner{padding:8px 16px}
  .main-nav{position:fixed;top:62px;left:0;width:100%;background:rgba(26,17,40,.98);flex-direction:column;padding:20px;transform:translateY(-120%);transition:transform .3s;gap:0}
  .main-nav.open{transform:translateY(0)}
  .main-nav a{padding:14px 0;border-bottom:1px solid rgba(212,168,67,.1)}
  .mobile-toggle{display:flex}
  .hero-banner{height:360px;margin-top:58px}
  .hero-overlay h1{font-size:1.8rem}
  .hero-overlay p{font-size:.95rem}
  .section{padding:40px 0}
  .section-title h2{font-size:1.5rem}
  .video-grid,.feature-grid,.expert-grid,.review-grid,.contact-grid{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr}
  .page-hero{height:240px;margin-top:58px}
}
@media(max-width:480px){
  .hero-banner{height:280px}
  .hero-overlay h1{font-size:1.4rem}
  .search-box input{padding:8px 14px;font-size:.85rem}
  .search-box button{padding:8px 16px;font-size:.85rem}
}