/* ============================================
   丝瓜视频 - 原创样式表
   品牌色系：主色调 #55EFC4 / 辅色调 #A29BFE / 背景色 #141428
   uebzobb.cn - 影视传媒与视频社区
   ============================================ */

/* 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:#0D0D1A;color:#E8E8F0;line-height:1.7;overflow-x:hidden}
a{color:#55EFC4;text-decoration:none;transition:color .3s}
a:hover{color:#55EFC4}
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}
.section-padding{padding:60px 0}

/* ============ Header & Navigation ============ */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(13,13,26,.92);backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,77,106,.15);transition:all .3s}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;max-width:1200px;margin:0 auto}
.logo-link{display:flex;align-items:center;gap:8px}
.logo-link img{height:42px;width:auto}
.logo-text{font-size:1.3rem;font-weight:800;background:linear-gradient(135deg,#55EFC4,#A29BFE);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{padding:8px 16px;border-radius:8px;font-size:.9rem;color:#C8C8D8;transition:all .3s;font-weight:500}
.main-nav a:hover,.main-nav a.active{color:#FFF;background:linear-gradient(135deg,rgba(255,77,106,.2),rgba(108,92,231,.2))}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2px;background:#FFF;border-radius:2px;transition:all .3s}

/* Search Bar */
.search-bar{background:rgba(22,33,62,.6);border-bottom:1px solid rgba(108,92,231,.2);padding:12px 0}
.search-bar .container{display:flex;justify-content:center}
.search-wrapper{position:relative;width:100%;max-width:600px}
.search-wrapper input{width:100%;padding:10px 44px 10px 18px;border:2px solid rgba(255,77,106,.3);border-radius:25px;background:rgba(15,52,96,.5);color:#FFF;font-size:.95rem;outline:none;transition:border-color .3s}
.search-wrapper input:focus{border-color:#55EFC4}
.search-wrapper input::placeholder{color:#8888A0}
.search-wrapper button{position:absolute;right:4px;top:50%;transform:translateY(-50%);background:linear-gradient(135deg,#55EFC4,#A29BFE);border:none;color:#FFF;width:36px;height:36px;border-radius:50%;cursor:pointer;font-size:1rem;display:flex;align-items:center;justify-content:center;transition:transform .2s}
.search-wrapper button:hover{transform:translateY(-50%) scale(1.1)}

/* ============ Hero Banner ============ */
.hero-section{position:relative;min-height:520px;display:flex;align-items:center;overflow:hidden;margin-top:62px}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;filter:brightness(.55)}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,13,26,.3) 0%,rgba(13,13,26,.85) 100%);z-index:1}
.hero-content{position:relative;z-index:2;text-align:center;width:100%;padding:60px 20px}
.hero-content h1{font-size:2.8rem;margin-bottom:16px;text-shadow:0 2px 20px rgba(255,77,106,.4)}
.hero-content h1 .brand-highlight{background:linear-gradient(135deg,#55EFC4,#55EFC4);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-content p{font-size:1.15rem;color:#C8C8D8;max-width:700px;margin:0 auto 28px;line-height:1.8}
.hero-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:28px}
.hero-tags span{padding:6px 16px;border-radius:20px;font-size:.85rem;background:rgba(255,77,106,.15);color:#55EFC4;border:1px solid rgba(255,77,106,.3)}
.hero-btn{display:inline-block;padding:14px 36px;border-radius:30px;font-size:1rem;font-weight:600;color:#FFF;background:linear-gradient(135deg,#55EFC4,#A29BFE);box-shadow:0 4px 20px rgba(255,77,106,.4);transition:all .3s}
.hero-btn:hover{transform:translateY(-2px);box-shadow:0 6px 30px rgba(255,77,106,.6);color:#FFF}

/* ============ Section Titles ============ */
.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:'';position:absolute;bottom:-8px;left:50%;transform:translateX(-50%);width:60px;height:3px;background:linear-gradient(90deg,#55EFC4,#A29BFE);border-radius:3px}
.section-title p{color:#9898B0;font-size:1rem;margin-top:16px}

/* ============ Video Cards Grid ============ */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.video-card{position:relative;border-radius:12px;overflow:hidden;background:#16213E;transition:transform .3s,box-shadow .3s;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 40px rgba(255,77,106,.2)}
.video-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden}
.video-card .thumb img,.video-card .thumb video{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .thumb img,.video-card:hover .thumb video{transform:scale(1.08)}
.video-card .play-btn{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) scale(0);width:56px;height:56px;background:rgba(255,77,106,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:transform .3s;box-shadow:0 4px 20px rgba(255,77,106,.5)}
.video-card:hover .play-btn{transform:translate(-50%,-50%) scale(1)}
.play-btn::after{content:'';width:0;height:0;border-left:18px solid #FFF;border-top:11px solid transparent;border-bottom:11px solid transparent;margin-left:4px}
.video-card .card-info{padding:14px 16px}
.video-card .card-title{font-size:.95rem;font-weight:600;color:#FFF;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-card .card-meta{display:flex;align-items:center;gap:12px;font-size:.8rem;color:#8888A0}
.video-card .card-meta span{display:flex;align-items:center;gap:4px}
.video-card .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-card .tag-badge{position:absolute;top:8px;left:8px;background:linear-gradient(135deg,#55EFC4,#A29BFE);color:#FFF;padding:3px 10px;border-radius:12px;font-size:.72rem;font-weight:600}

/* ============ Category Tabs ============ */
.category-tabs{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:35px}
.category-tabs .tab{padding:8px 22px;border-radius:22px;font-size:.9rem;color:#9898B0;background:rgba(22,33,62,.8);border:1px solid rgba(108,92,231,.2);cursor:pointer;transition:all .3s}
.category-tabs .tab:hover,.category-tabs .tab.active{color:#FFF;background:linear-gradient(135deg,#55EFC4,#A29BFE);border-color:transparent}

/* ============ Feature Modules ============ */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:linear-gradient(145deg,#16213E,#0F3460);border-radius:16px;padding:32px 24px;text-align:center;border:1px solid rgba(108,92,231,.15);transition:all .3s}
.feature-card:hover{border-color:rgba(255,77,106,.4);transform:translateY(-4px);box-shadow:0 8px 30px rgba(108,92,231,.15)}
.feature-icon{width:64px;height:64px;margin:0 auto 18px;background:linear-gradient(135deg,rgba(255,77,106,.2),rgba(108,92,231,.2));border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:1.8rem}
.feature-card h3{font-size:1.1rem;margin-bottom:10px}
.feature-card p{font-size:.88rem;color:#9898B0;line-height:1.6}

/* ============ Expert Section ============ */
.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.expert-card{background:#16213E;border-radius:16px;overflow:hidden;text-align:center;border:1px solid rgba(108,92,231,.12);transition:all .3s}
.expert-card:hover{border-color:rgba(255,77,106,.3);transform:translateY(-4px)}
.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 .expert-info{padding:18px 16px}
.expert-card .expert-name{font-size:1.05rem;font-weight:700;margin-bottom:4px}
.expert-card .expert-role{font-size:.82rem;color:#55EFC4;margin-bottom:8px}
.expert-card .expert-desc{font-size:.82rem;color:#9898B0;line-height:1.5;margin-bottom:12px}
.expert-card .expert-btns{display:flex;gap:8px;justify-content:center}
.expert-card .expert-btns a{padding:6px 14px;border-radius:16px;font-size:.78rem;font-weight:500}
.btn-primary{background:linear-gradient(135deg,#55EFC4,#A29BFE);color:#FFF!important}
.btn-outline{border:1px solid rgba(255,77,106,.4);color:#55EFC4!important}
.btn-outline:hover{background:rgba(255,77,106,.1)}

/* ============ Partners ============ */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:30px;padding:20px 0}
.partner-item{width:120px;height:60px;background:rgba(22,33,62,.8);border-radius:10px;display:flex;align-items:center;justify-content:center;border:1px solid rgba(108,92,231,.15);transition:all .3s;padding:10px}
.partner-item:hover{border-color:rgba(255,77,106,.3);background:rgba(22,33,62,1)}
.partner-item span{font-size:.85rem;color:#9898B0;font-weight:600}

/* ============ How-To Guide ============ */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.howto-step{position:relative;background:#16213E;border-radius:14px;padding:28px 20px 20px;text-align:center;border:1px solid rgba(108,92,231,.12);counter-increment:step}
.howto-step::before{content:counter(step);position:absolute;top:-16px;left:50%;transform:translateX(-50%);width:32px;height:32px;background:linear-gradient(135deg,#55EFC4,#A29BFE);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.9rem;font-weight:700;color:#FFF;line-height:32px}
.howto-step h4{font-size:1rem;margin-bottom:8px;margin-top:8px}
.howto-step p{font-size:.85rem;color:#9898B0}

/* ============ FAQ Section ============ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#16213E;border-radius:12px;margin-bottom:12px;border:1px solid rgba(108,92,231,.12);overflow:hidden}
.faq-question{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:.95rem;transition:background .3s}
.faq-question:hover{background:rgba(255,77,106,.05)}
.faq-question .arrow{font-size:1.2rem;transition:transform .3s;color:#55EFC4}
.faq-item.open .faq-question .arrow{transform:rotate(180deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 24px}
.faq-item.open .faq-answer{max-height:300px;padding:0 24px 18px}
.faq-answer p{font-size:.9rem;color:#9898B0;line-height:1.7}

/* ============ Reviews ============ */
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.review-card{background:#16213E;border-radius:14px;padding:24px;border:1px solid rgba(108,92,231,.12)}
.review-header{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.review-avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#55EFC4,#A29BFE);display:flex;align-items:center;justify-content:center;font-size:1.1rem;font-weight:700;color:#FFF;flex-shrink:0}
.review-name{font-weight:600;font-size:.95rem}
.review-date{font-size:.78rem;color:#8888A0}
.review-stars{color:#FFB800;font-size:.9rem;margin-bottom:8px;letter-spacing:2px}
.review-text{font-size:.88rem;color:#B8B8C8;line-height:1.7}

/* ============ Contact Section ============ */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.contact-card{background:#16213E;border-radius:14px;padding:28px;text-align:center;border:1px solid rgba(108,92,231,.12)}
.contact-card h4{font-size:1.05rem;margin-bottom:12px;color:#55EFC4}
.contact-card p{font-size:.88rem;color:#9898B0;line-height:1.7}
.contact-card .qr-img{width:160px;height:160px;margin:12px auto;border-radius:10px;overflow:hidden}
.contact-card .qr-img img{width:100%;height:100%;object-fit:cover}

/* ============ Social Share ============ */
.share-bar{display:flex;justify-content:center;gap:14px;padding:20px 0}
.share-btn{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.1rem;color:#FFF;transition:all .3s;cursor:pointer}
.share-btn:hover{transform:translateY(-3px)}
.share-wechat{background:#07C160}
.share-weibo{background:#E6162D}
.share-douyin{background:#161823}
.share-bilibili{background:#00A1D6}

/* ============ Footer ============ */
.site-footer{background:#0A0A18;border-top:1px solid rgba(108,92,231,.15);padding:40px 0 20px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px}
.footer-brand .logo-link{margin-bottom:12px}
.footer-brand p{font-size:.85rem;color:#8888A0;line-height:1.7}
.footer-col h5{font-size:.95rem;margin-bottom:14px;color:#55EFC4}
.footer-col a{display:block;font-size:.85rem;color:#8888A0;padding:4px 0;transition:color .3s}
.footer-col a:hover{color:#55EFC4}
.footer-bottom{border-top:1px solid rgba(108,92,231,.1);padding-top:18px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px}
.footer-bottom p{font-size:.82rem;color:#6868A0}
.footer-qr{display:flex;gap:16px}
.footer-qr .qr-item{text-align:center}
.footer-qr .qr-item img{width:90px;height:90px;border-radius:8px;margin-bottom:4px}
.footer-qr .qr-item span{font-size:.72rem;color:#8888A0}

/* ============ Breadcrumb ============ */
.breadcrumb{padding:16px 0;font-size:.85rem;color:#8888A0}
.breadcrumb a{color:#55EFC4}
.breadcrumb span{margin:0 8px;color:#6868A0}

/* ============ Inner Page Hero ============ */
.inner-hero{padding:100px 0 40px;text-align:center;background:linear-gradient(180deg,rgba(255,77,106,.08),transparent)}
.inner-hero h1{font-size:2.2rem;margin-bottom:10px}
.inner-hero p{color:#9898B0;font-size:1rem}

/* ============ Stats Bar ============ */
.stats-bar{display:flex;justify-content:center;gap:40px;padding:30px 0;flex-wrap:wrap}
.stat-item{text-align:center}
.stat-num{font-size:2.2rem;font-weight:800;background:linear-gradient(135deg,#55EFC4,#A29BFE);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.stat-label{font-size:.85rem;color:#9898B0;margin-top:4px}

/* ============ Utility ============ */
.text-gradient{background:linear-gradient(135deg,#55EFC4,#A29BFE);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.bg-dark{background:#0D0D1A}
.bg-darker{background:#0A0A18}
.bg-card{background:#16213E}
.mt-20{margin-top:20px}
.mb-20{margin-bottom:20px}
.text-center{text-align:center}
.text-pink{color:#55EFC4}
.text-muted{color:#9898B0}

/* ============ Lazy Load ============ */
img[data-src]{opacity:0;transition:opacity .5s}
img[data-src].loaded,img:not([data-src]){opacity:1}

/* ============ Back to Top ============ */
.back-top{position:fixed;bottom:30px;right:30px;width:44px;height:44px;background:linear-gradient(135deg,#55EFC4,#A29BFE);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#FFF;font-size:1.2rem;cursor:pointer;opacity:0;visibility:hidden;transition:all .3s;z-index:999;box-shadow:0 4px 15px rgba(255,77,106,.4)}
.back-top.visible{opacity:1;visibility:visible}
.back-top:hover{transform:translateY(-3px)}

/* ============ Responsive ============ */
@media(max-width:1024px){
  .video-grid{grid-template-columns:repeat(3,1fr)}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .howto-steps{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .nav-toggle{display:flex}
  .main-nav{position:fixed;top:62px;left:0;width:100%;background:rgba(13,13,26,.98);flex-direction:column;padding:20px;gap:4px;transform:translateY(-120%);transition:transform .3s;border-bottom:1px solid rgba(255,77,106,.15)}
  .main-nav.open{transform:translateY(0)}
  .main-nav a{width:100%;text-align:center;padding:12px}
  .hero-content h1{font-size:1.8rem}
  .video-grid{grid-template-columns:repeat(2,1fr)}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .feature-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .howto-steps{grid-template-columns:1fr}
  .stats-bar{gap:20px}
  .stat-num{font-size:1.6rem}
  .section-padding{padding:40px 0}
  .header-inner{padding:8px 16px}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .hero-content h1{font-size:1.5rem}
  .section-title h2{font-size:1.5rem}
  .hero-section{min-height:400px}
}