/* ========================================
   糖心vlog - 原创样式表
   品牌色系：珊瑚粉 #FF6B9D / 暖橙 #FF8A65 / 深紫 #2D1B69 / 浅灰 #F5F5F5
   ======================================== */

/* CSS Reset & Base */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",Arial,sans-serif;color:#333;background:#f8f6f9;line-height:1.7;overflow-x:hidden}
a{color:#FF6B9D;text-decoration:none;transition:color .3s}
a:hover{color:#FF8A65}
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:#2D1B69}

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

/* ========== Header ========== */
.site-header{background:linear-gradient(135deg,#2D1B69 0%,#4A2D8F 50%,#6B3FA0 100%);position:sticky;top:0;z-index:1000;box-shadow:0 2px 20px rgba(45,27,105,.3)}
.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;border-radius:8px}
.site-logo span{color:#fff;font-size:1.4rem;font-weight:800;letter-spacing:1px}
.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{color:rgba(255,255,255,.9);padding:12px 16px;font-size:.95rem;font-weight:500;transition:all .3s;border-bottom:3px solid transparent;white-space:nowrap}
.main-nav a:hover,.main-nav a.active{color:#fff;border-bottom-color:#FF6B9D;background:rgba(255,107,157,.15)}
.mobile-menu-btn{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer;padding:8px}

/* Search Bar */
.search-bar{background:rgba(45,27,105,.4);padding:12px 0;border-bottom:1px solid rgba(255,255,255,.1)}
.search-bar .container{display:flex;justify-content:center}
.search-box{display:flex;max-width:600px;width:100%}
.search-box input{flex:1;padding:10px 18px;border:2px solid rgba(255,107,157,.5);border-right:none;border-radius:25px 0 0 25px;background:rgba(255,255,255,.95);font-size:.95rem;outline:none;transition:border-color .3s}
.search-box input:focus{border-color:#FF6B9D}
.search-box button{padding:10px 24px;background:linear-gradient(135deg,#FF6B9D,#FF8A65);color:#fff;border:none;border-radius:0 25px 25px 0;cursor:pointer;font-size:.95rem;font-weight:600;transition:opacity .3s}
.search-box button:hover{opacity:.9}

/* ========== Hero Banner ========== */
.hero-banner{position:relative;overflow:hidden;height:480px;background:#2D1B69}
.hero-slides{display:flex;transition:transform .6s ease;height:100%}
.hero-slide{min-width:100%;height:100%;position:relative}
.hero-slide img{width:100%;height:100%;object-fit:cover}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(45,27,105,.85) 0%,rgba(45,27,105,.3) 50%,transparent 100%);display:flex;align-items:flex-end;padding:40px}
.hero-text{max-width:700px;color:#fff}
.hero-text h1{font-size:2.4rem;margin-bottom:12px;text-shadow:0 2px 10px rgba(0,0,0,.5)}
.hero-text p{font-size:1.1rem;opacity:.9;margin-bottom:20px}
.hero-text .btn-primary{display:inline-block;padding:12px 32px;background:linear-gradient(135deg,#FF6B9D,#FF8A65);color:#fff;border-radius:25px;font-weight:600;transition:transform .3s,box-shadow .3s}
.hero-text .btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(255,107,157,.4)}
.hero-dots{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:10}
.hero-dots span{width:12px;height:12px;border-radius:50%;background:rgba(255,255,255,.4);cursor:pointer;transition:all .3s}
.hero-dots span.active{background:#FF6B9D;transform:scale(1.2)}

/* ========== Section Common ========== */
.section{padding:50px 0}
.section-title{text-align:center;margin-bottom:36px}
.section-title h2{font-size:1.9rem;color:#2D1B69;position:relative;display:inline-block;padding-bottom:12px}
.section-title h2::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:60px;height:4px;background:linear-gradient(90deg,#FF6B9D,#FF8A65);border-radius:2px}
.section-title p{color:#777;margin-top:10px;font-size:1rem}
.section-alt{background:#fff}

/* ========== Video Cards Grid ========== */
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.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;cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 35px rgba(255,107,157,.2)}
.video-card a{color:inherit;text-decoration:none}
.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(1.08)}
.video-thumb .play-icon{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:50px;height:50px;background:rgba(255,107,157,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s}
.video-card:hover .play-icon{opacity:1}
.play-icon::after{content:'';border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:3px}
.video-thumb .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:14px}
.video-info h3{font-size:.95rem;color:#2D1B69;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.4}
.video-meta{display:flex;align-items:center;gap:12px;font-size:.8rem;color:#999}
.video-meta span{display:flex;align-items:center;gap:3px}
.video-tag{display:inline-block;padding:2px 8px;background:rgba(255,107,157,.1);color:#FF6B9D;border-radius:10px;font-size:.72rem;margin-top:6px}

/* ========== Expert Section ========== */
.expert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.expert-card{background:#fff;border-radius:16px;padding:30px;text-align:center;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:transform .3s}
.expert-card:hover{transform:translateY(-4px)}
.expert-card img{width:100px;height:100px;border-radius:50%;object-fit:cover;margin:0 auto 16px;border:3px solid #FF6B9D}
.expert-card h4{color:#2D1B69;font-size:1.1rem;margin-bottom:4px}
.expert-card .role{color:#FF6B9D;font-size:.85rem;margin-bottom:10px}
.expert-card p{color:#666;font-size:.88rem;line-height:1.6;margin-bottom:14px}
.expert-card .expert-btns{display:flex;gap:10px;justify-content:center}
.expert-card .btn-sm{padding:6px 16px;border-radius:20px;font-size:.82rem;font-weight:500;transition:all .3s}
.btn-outline{border:1px solid #FF6B9D;color:#FF6B9D;background:transparent}
.btn-outline:hover{background:#FF6B9D;color:#fff}
.btn-fill{background:linear-gradient(135deg,#FF6B9D,#FF8A65);color:#fff;border:none}
.btn-fill:hover{opacity:.9}

/* ========== FAQ Section ========== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:12px;margin-bottom:14px;box-shadow:0 2px 10px rgba(0,0,0,.05);overflow:hidden}
.faq-question{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;color:#2D1B69;font-size:1rem;transition:background .3s}
.faq-question:hover{background:rgba(255,107,157,.05)}
.faq-question .arrow{transition:transform .3s;font-size:1.2rem;color:#FF6B9D}
.faq-item.open .faq-question .arrow{transform:rotate(180deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s ease;color:#666;font-size:.92rem;line-height:1.8}
.faq-item.open .faq-answer{max-height:300px;padding:0 24px 18px}

/* ========== Reviews Section ========== */
.review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.review-card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 3px 15px rgba(0,0,0,.06)}
.review-header{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.review-avatar{width:45px;height:45px;border-radius:50%;background:linear-gradient(135deg,#FF6B9D,#FF8A65);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.1rem}
.review-name{font-weight:600;color:#2D1B69;font-size:.95rem}
.review-date{font-size:.78rem;color:#aaa}
.review-stars{color:#FFB800;font-size:.9rem;margin-bottom:8px;letter-spacing:2px}
.review-text{color:#555;font-size:.9rem;line-height:1.7}

/* ========== Partner Logos ========== */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.partner-wall .partner-item{background:#fff;padding:16px 28px;border-radius:10px;box-shadow:0 2px 10px rgba(0,0,0,.05);font-size:1rem;font-weight:600;color:#2D1B69;transition:transform .3s}
.partner-wall .partner-item:hover{transform:scale(1.05)}

/* ========== Contact Section ========== */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}
.contact-info{background:#fff;border-radius:16px;padding:30px;box-shadow:0 4px 20px rgba(0,0,0,.06)}
.contact-info h3{color:#2D1B69;margin-bottom:16px;font-size:1.2rem}
.contact-item{display:flex;align-items:flex-start;gap:12px;margin-bottom:14px;color:#555;font-size:.92rem}
.contact-item .icon{width:36px;height:36px;background:linear-gradient(135deg,#FF6B9D,#FF8A65);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:.9rem;flex-shrink:0}
.qr-codes{display:flex;gap:20px;justify-content:center;margin-top:20px}
.qr-codes .qr-item{text-align:center}
.qr-codes .qr-item img{width:140px;height:140px;border-radius:8px;margin-bottom:8px}
.qr-codes .qr-item p{font-size:.82rem;color:#666}

/* ========== How-To Section ========== */
.howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.howto-step{text-align:center;padding:28px 20px;background:#fff;border-radius:14px;box-shadow:0 3px 15px rgba(0,0,0,.06);position:relative}
.howto-step .step-num{width:48px;height:48px;background:linear-gradient(135deg,#FF6B9D,#FF8A65);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.3rem;font-weight:800;margin:0 auto 14px}
.howto-step h4{color:#2D1B69;margin-bottom:8px;font-size:1rem}
.howto-step p{color:#666;font-size:.88rem;line-height:1.6}

/* ========== Social Share ========== */
.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:20px;font-size:.85rem;font-weight:500;color:#fff;transition:opacity .3s;cursor:pointer}
.share-btn:hover{opacity:.85;color:#fff}
.share-wechat{background:#07C160}
.share-weibo{background:#E6162D}
.share-douyin{background:#161823}
.share-bilibili{background:#00A1D6}

/* ========== AI Section ========== */
.ai-features{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ai-card{background:linear-gradient(135deg,#2D1B69,#4A2D8F);border-radius:14px;padding:28px;color:#fff;transition:transform .3s}
.ai-card:hover{transform:translateY(-4px)}
.ai-card .ai-icon{font-size:2.2rem;margin-bottom:14px}
.ai-card h4{font-size:1.1rem;margin-bottom:10px;color:#fff}
.ai-card p{font-size:.88rem;opacity:.85;line-height:1.7}

/* ========== Footer ========== */
.site-footer{background:linear-gradient(135deg,#1a0e3e,#2D1B69);color:rgba(255,255,255,.7);padding:40px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-brand img{height:36px;margin-bottom:12px}
.footer-brand p{font-size:.88rem;line-height:1.7;color:rgba(255,255,255,.6)}
.footer-col h4{color:#fff;font-size:1rem;margin-bottom:14px;position:relative;padding-bottom:8px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:#FF6B9D}
.footer-col a{display:block;color:rgba(255,255,255,.6);font-size:.88rem;margin-bottom:8px;transition:color .3s}
.footer-col a:hover{color:#FF6B9D}
.footer-bottom{padding:20px 0;text-align:center;font-size:.82rem;color:rgba(255,255,255,.5)}
.footer-bottom a{color:rgba(255,255,255,.6)}

/* ========== Breadcrumb ========== */
.breadcrumb{padding:14px 0;font-size:.85rem;color:#999}
.breadcrumb a{color:#FF6B9D}
.breadcrumb span{margin:0 6px;color:#ccc}

/* ========== Video Player Page ========== */
.video-player-wrap{background:#000;border-radius:12px;overflow:hidden;margin-bottom:24px}
.video-player-wrap video{width:100%;max-height:600px}
.video-detail{display:grid;grid-template-columns:2fr 1fr;gap:30px;padding:30px 0}
.video-main h1{font-size:1.6rem;color:#2D1B69;margin-bottom:12px}
.video-main .video-desc{color:#666;font-size:.92rem;line-height:1.8;margin-bottom:20px}
.video-sidebar h3{color:#2D1B69;margin-bottom:16px;font-size:1.1rem}
.related-item{display:flex;gap:12px;margin-bottom:16px;cursor:pointer;transition:opacity .3s}
.related-item:hover{opacity:.8}
.related-item img{width:140px;height:80px;object-fit:cover;border-radius:8px;flex-shrink:0}
.related-item .ri-info h4{font-size:.85rem;color:#2D1B69;margin-bottom:4px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-item .ri-info p{font-size:.75rem;color:#999}

/* ========== Category Page ========== */
.category-header{background:linear-gradient(135deg,#2D1B69,#4A2D8F);padding:40px 0;color:#fff;text-align:center}
.category-header h1{font-size:2rem;margin-bottom:8px}
.category-header p{opacity:.8;font-size:1rem}

/* ========== Responsive ========== */
@media(max-width:1024px){
  .video-grid{grid-template-columns:repeat(3,1fr)}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .howto-steps{grid-template-columns:repeat(2,1fr)}
  .ai-features{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .header-inner{flex-wrap:wrap}
  .main-nav{display:none;width:100%;flex-direction:column;background:#2D1B69;position:absolute;top:100%;left:0;z-index:999;padding:10px 0}
  .main-nav.open{display:flex}
  .main-nav a{padding:14px 24px;border-bottom:1px solid rgba(255,255,255,.1)}
  .mobile-menu-btn{display:block}
  .video-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .hero-banner{height:320px}
  .hero-text h1{font-size:1.6rem}
  .review-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .video-detail{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .howto-steps{grid-template-columns:1fr}
  .ai-features{grid-template-columns:1fr}
  .section{padding:30px 0}
  .section-title h2{font-size:1.5rem}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .search-box input{font-size:.85rem;padding:8px 14px}
}

/* ========== Lazy Load ========== */
img[data-src]{opacity:0;transition:opacity .4s}
img.loaded{opacity:1}

/* ========== Scrollbar ========== */
::-webkit-scrollbar{width:8px}
::-webkit-scrollbar-track{background:#f1f1f1}
::-webkit-scrollbar-thumb{background:linear-gradient(#FF6B9D,#FF8A65);border-radius:4px}

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

/* ========== Tags ========== */
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:16px}
.tag-cloud a{padding:5px 14px;background:rgba(255,107,157,.1);color:#FF6B9D;border-radius:15px;font-size:.82rem;transition:all .3s}
.tag-cloud a:hover{background:#FF6B9D;color:#fff}

/* ========== Danmu Style ========== */
.danmu-bar{background:rgba(45,27,105,.05);padding:8px 0;overflow:hidden;position:relative;height:36px}
.danmu-track{display:flex;gap:40px;animation:danmuScroll 30s linear infinite;white-space:nowrap}
.danmu-track span{font-size:.82rem;color:#666;background:rgba(255,107,157,.08);padding:4px 12px;border-radius:12px}
@keyframes danmuScroll{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}

/* ========== Live Badge ========== */
.live-badge{display:inline-flex;align-items:center;gap:4px;background:#FF4444;color:#fff;padding:2px 8px;border-radius:4px;font-size:.7rem;font-weight:600}
.live-badge::before{content:'';width:6px;height:6px;background:#fff;border-radius:50%;animation:livePulse 1.5s infinite}
@keyframes livePulse{0%,100%{opacity:1}50%{opacity:.3}}

/* Stats Bar */
.stats-bar{background:linear-gradient(135deg,#FF6B9D,#FF8A65);padding:30px 0;color:#fff}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat-item .stat-num{font-size:2.2rem;font-weight:800}
.stat-item .stat-label{font-size:.9rem;opacity:.85;margin-top:4px}
@media(max-width:768px){.stats-grid{grid-template-columns:repeat(2,1fr)}}