/* ========================================
   玖玖一区二区mv - 全站样式表
   品牌色: #7C3AED (紫) #EC4899 (粉) #1E1B4B (深蓝)
   ======================================== */

/* Reset & Base */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:#333;line-height:1.7;background:#f8f7ff}
a{color:#7C3AED;text-decoration:none;transition:color .3s}
a:hover{color:#EC4899}
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:#1E1B4B}

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

/* ========== Header ========== */
.site-header{background:linear-gradient(135deg,#1E1B4B 0%,#312E81 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-wrap{display:flex;align-items:center;gap:10px}
.logo-wrap img{width:42px;height:42px;border-radius:8px}
.logo-wrap .brand-name{color:#fff;font-size:1.2rem;font-weight:700;white-space:nowrap}
.main-nav{display:flex;gap:0}
.main-nav a{color:rgba(255,255,255,.85);padding:8px 16px;font-size:.95rem;border-radius:6px;transition:all .3s}
.main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(124,58,237,.4)}
.mobile-menu-btn{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* Search Bar */
.search-bar{background:linear-gradient(135deg,#312E81 0%,#4C1D95 100%);padding:14px 0}
.search-bar .container{display:flex;justify-content:center}
.search-form{display:flex;max-width:600px;width:100%;position:relative}
.search-form input{flex:1;padding:12px 20px;border:2px solid rgba(124,58,237,.3);border-radius:25px 0 0 25px;font-size:.95rem;outline:none;background:rgba(255,255,255,.95);transition:border-color .3s}
.search-form input:focus{border-color:#7C3AED}
.search-form button{padding:12px 28px;background:linear-gradient(135deg,#7C3AED,#EC4899);color:#fff;border:none;border-radius:0 25px 25px 0;cursor:pointer;font-size:.95rem;font-weight:600;transition:opacity .3s}
.search-form button:hover{opacity:.9}

/* ========== Hero Banner ========== */
.hero-banner{position:relative;overflow:hidden;min-height:420px;display:flex;align-items:center;background:linear-gradient(135deg,#1E1B4B 0%,#4C1D95 50%,#7C3AED 100%)}
.hero-banner .hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.35}
.hero-content{position:relative;z-index:2;text-align:center;padding:60px 20px;width:100%}
.hero-content h1{color:#fff;font-size:2.5rem;margin-bottom:16px;text-shadow:0 2px 10px rgba(0,0,0,.3)}
.hero-content h1 span{background:linear-gradient(135deg,#EC4899,#F59E0B);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-content p{color:rgba(255,255,255,.9);font-size:1.15rem;max-width:700px;margin:0 auto 30px}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-primary{display:inline-block;padding:14px 36px;background:linear-gradient(135deg,#7C3AED,#EC4899);color:#fff;border-radius:30px;font-weight:600;font-size:1rem;transition:transform .3s,box-shadow .3s;box-shadow:0 4px 15px rgba(124,58,237,.4)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 25px rgba(124,58,237,.5);color:#fff}
.btn-outline{display:inline-block;padding:14px 36px;border:2px solid rgba(255,255,255,.6);color:#fff;border-radius:30px;font-weight:600;font-size:1rem;transition:all .3s}
.btn-outline:hover{background:rgba(255,255,255,.15);border-color:#fff;color:#fff}

/* ========== Section Common ========== */
.section{padding:60px 0}
.section-dark{background:linear-gradient(135deg,#1E1B4B 0%,#312E81 100%);color:#fff}
.section-dark h2,.section-dark h3,.section-dark h4{color:#fff}
.section-light{background:#fff}
.section-alt{background:#f3f0ff}
.section-title{text-align:center;margin-bottom:45px}
.section-title h2{font-size:2rem;margin-bottom:10px;position:relative;display:inline-block}
.section-title h2::after{content:'';display:block;width:60px;height:4px;background:linear-gradient(135deg,#7C3AED,#EC4899);margin:12px auto 0;border-radius:2px}
.section-title p{color:#666;font-size:1.05rem;margin-top:10px}
.section-dark .section-title p{color:rgba(255,255,255,.7)}

/* ========== Video Cards ========== */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 15px rgba(0,0,0,.08);transition:transform .3s,box-shadow .3s}
.video-card:hover{transform:translateY(-5px);box-shadow:0 8px 30px rgba(124,58,237,.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)}
.video-play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;background:rgba(0,0,0,.35)}
.video-card:hover .video-play-btn{opacity:1}
.video-play-btn span{width:60px;height:60px;background:rgba(124,58,237,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 20px rgba(124,58,237,.5)}
.video-play-btn span::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:4px}
.video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);color:#fff;padding:2px 8px;border-radius:4px;font-size:.8rem}
.video-info{padding:16px}
.video-info h3{font-size:1rem;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;gap:16px;color:#999;font-size:.85rem}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-tags{display:flex;gap:6px;margin-top:10px;flex-wrap:wrap}
.video-tags span{background:#f3f0ff;color:#7C3AED;padding:3px 10px;border-radius:12px;font-size:.78rem}

/* ========== Feature Grid ========== */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.feature-card{background:#fff;border-radius:12px;padding:30px 24px;text-align:center;box-shadow:0 4px 15px rgba(0,0,0,.06);transition:transform .3s,box-shadow .3s;border:1px solid rgba(124,58,237,.08)}
.feature-card:hover{transform:translateY(-4px);box-shadow:0 8px 25px rgba(124,58,237,.12)}
.feature-icon{width:64px;height:64px;margin:0 auto 18px;background:linear-gradient(135deg,#7C3AED,#EC4899);border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:1.8rem;color:#fff}
.feature-card h3{font-size:1.1rem;margin-bottom:10px}
.feature-card p{color:#666;font-size:.92rem;line-height:1.6}

/* Dark feature cards */
.section-dark .feature-card{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.1)}
.section-dark .feature-card p{color:rgba(255,255,255,.7)}

/* ========== Expert Section ========== */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.expert-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 15px rgba(0,0,0,.08);text-align:center;padding:30px 20px;transition:transform .3s}
.expert-card:hover{transform:translateY(-4px)}
.expert-avatar{width:100px;height:100px;border-radius:50%;margin:0 auto 16px;object-fit:cover;border:3px solid #7C3AED}
.expert-card h3{font-size:1.05rem;margin-bottom:4px}
.expert-card .expert-title{color:#7C3AED;font-size:.88rem;margin-bottom:10px}
.expert-card p{color:#666;font-size:.88rem;line-height:1.6;margin-bottom:14px}
.expert-links{display:flex;gap:10px;justify-content:center}
.expert-links a{padding:6px 16px;border-radius:20px;font-size:.82rem;font-weight:600}
.expert-links .btn-sm-primary{background:linear-gradient(135deg,#7C3AED,#EC4899);color:#fff}
.expert-links .btn-sm-outline{border:1px solid #7C3AED;color:#7C3AED}

/* ========== FAQ Section ========== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:10px;margin-bottom:12px;box-shadow:0 2px 8px rgba(0,0,0,.05);overflow:hidden;border:1px solid rgba(124,58,237,.08)}
.faq-question{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:1rem;color:#1E1B4B;transition:background .3s}
.faq-question:hover{background:#f8f7ff}
.faq-question .faq-icon{width:24px;height:24px;border-radius:50%;background:#f3f0ff;display:flex;align-items:center;justify-content:center;transition:transform .3s;flex-shrink:0;color:#7C3AED;font-size:.9rem}
.faq-item.active .faq-icon{transform:rotate(180deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:max-height .3s ease,padding .3s;color:#666;font-size:.94rem;line-height:1.7}
.faq-item.active .faq-answer{max-height:300px;padding:0 24px 18px}

/* ========== Reviews ========== */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.review-card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 4px 15px rgba(0,0,0,.06);border:1px solid rgba(124,58,237,.08)}
.review-header{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.review-avatar{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,#7C3AED,#EC4899);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.1rem;flex-shrink:0}
.review-name{font-weight:600;color:#1E1B4B}
.review-date{color:#999;font-size:.82rem}
.review-stars{color:#F59E0B;margin-bottom:10px;font-size:.9rem}
.review-text{color:#555;font-size:.92rem;line-height:1.7}

/* ========== Partner Logos ========== */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.partner-logo{width:120px;height:60px;background:#f3f0ff;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#7C3AED;font-weight:700;font-size:.85rem;border:1px solid rgba(124,58,237,.1);transition:transform .3s}
.partner-logo:hover{transform:scale(1.05)}

/* ========== How-To Section ========== */
.howto-steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:24px;counter-reset:step}
.howto-step{background:#fff;border-radius:12px;padding:30px 24px;text-align:center;box-shadow:0 4px 15px rgba(0,0,0,.06);position:relative;counter-increment:step;border:1px solid rgba(124,58,237,.08)}
.howto-step::before{content:counter(step);display:flex;align-items:center;justify-content:center;width:40px;height:40px;background:linear-gradient(135deg,#7C3AED,#EC4899);color:#fff;border-radius:50%;font-weight:700;font-size:1.1rem;margin:0 auto 16px}
.howto-step h3{font-size:1.05rem;margin-bottom:10px}
.howto-step p{color:#666;font-size:.9rem}

/* ========== Contact Section ========== */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.contact-card{background:rgba(255,255,255,.08);border-radius:12px;padding:24px;border:1px solid rgba(255,255,255,.1)}
.contact-card h3{margin-bottom:14px;font-size:1.05rem}
.contact-item{display:flex;align-items:center;gap:10px;margin-bottom:10px;color:rgba(255,255,255,.8);font-size:.92rem}
.contact-icon{width:36px;height:36px;background:rgba(124,58,237,.3);border-radius:8px;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:1rem}

/* ========== Share Buttons ========== */
.share-btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:20px}
.share-btn{padding:10px 20px;border-radius:25px;color:#fff;font-size:.88rem;font-weight:600;transition:transform .3s,opacity .3s;cursor:pointer;border:none}
.share-btn:hover{transform:translateY(-2px);opacity:.9;color:#fff}
.share-wechat{background:#07C160}
.share-weibo{background:#E6162D}
.share-douyin{background:#161823}
.share-bilibili{background:#00A1D6}

/* ========== Footer ========== */
.site-footer{background:#0F0D2E;color:rgba(255,255,255,.7);padding:50px 0 0}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:30px;margin-bottom:40px}
.footer-col h4{color:#fff;margin-bottom:16px;font-size:1rem}
.footer-col a{display:block;color:rgba(255,255,255,.6);padding:4px 0;font-size:.9rem;transition:color .3s}
.footer-col a:hover{color:#EC4899}
.footer-col p{font-size:.88rem;line-height:1.7}
.footer-qr{display:flex;gap:20px;margin-top:14px}
.footer-qr img{width:100px;height:100px;border-radius:8px;border:2px solid rgba(255,255,255,.1)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;text-align:center;font-size:.85rem}
.footer-bottom a{color:rgba(255,255,255,.6)}

/* ========== Breadcrumb ========== */
.breadcrumb{padding:14px 0;font-size:.88rem;color:#999}
.breadcrumb a{color:#7C3AED}
.breadcrumb span{margin:0 8px;color:#ccc}

/* ========== Page Header ========== */
.page-header{background:linear-gradient(135deg,#1E1B4B 0%,#4C1D95 100%);padding:50px 0;text-align:center}
.page-header h1{color:#fff;font-size:2rem;margin-bottom:10px}
.page-header p{color:rgba(255,255,255,.7);font-size:1.05rem}

/* ========== Content Article ========== */
.article-content{background:#fff;border-radius:12px;padding:40px;box-shadow:0 4px 15px rgba(0,0,0,.06);margin-bottom:30px}
.article-content h2{font-size:1.5rem;margin:30px 0 16px;padding-bottom:10px;border-bottom:2px solid #f3f0ff}
.article-content h3{font-size:1.2rem;margin:24px 0 12px}
.article-content p{margin-bottom:16px;color:#555;line-height:1.8}
.article-content img{border-radius:10px;margin:20px 0}

/* ========== Sidebar ========== */
.content-layout{display:grid;grid-template-columns:1fr 320px;gap:30px}
.sidebar-widget{background:#fff;border-radius:12px;padding:24px;box-shadow:0 4px 15px rgba(0,0,0,.06);margin-bottom:24px}
.sidebar-widget h3{font-size:1.05rem;margin-bottom:16px;padding-bottom:10px;border-bottom:2px solid #f3f0ff}
.sidebar-video-list .sidebar-video-item{display:flex;gap:12px;margin-bottom:14px;padding-bottom:14px;border-bottom:1px solid #f5f5f5}
.sidebar-video-item:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}
.sidebar-video-item img{width:100px;height:60px;object-fit:cover;border-radius:6px;flex-shrink:0}
.sidebar-video-item h4{font-size:.88rem;color:#333;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.sidebar-video-item .meta{color:#999;font-size:.78rem;margin-top:4px}

/* ========== Responsive ========== */
@media(max-width:992px){
  .content-layout{grid-template-columns:1fr}
  .hero-content h1{font-size:2rem}
}
@media(max-width:768px){
  .main-nav{display:none;position:absolute;top:100%;left:0;right:0;background:#1E1B4B;flex-direction:column;padding:10px 0;box-shadow:0 10px 30px rgba(0,0,0,.3)}
  .main-nav.active{display:flex}
  .main-nav a{padding:12px 24px;border-radius:0}
  .mobile-menu-btn{display:block}
  .header-inner{flex-wrap:wrap}
  .hero-content h1{font-size:1.6rem}
  .hero-content p{font-size:1rem}
  .section{padding:40px 0}
  .section-title h2{font-size:1.6rem}
  .video-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
  .feature-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .article-content{padding:24px}
}
@media(max-width:480px){
  .feature-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero-btns{flex-direction:column;align-items:center}
  .search-form{flex-direction:column}
  .search-form input{border-radius:25px;margin-bottom:8px}
  .search-form button{border-radius:25px}
}

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

/* ========== Animations ========== */
.fade-in{opacity:0;transform:translateY(20px);transition:opacity .6s,transform .6s}
.fade-in.visible{opacity:1;transform:translateY(0)}