/* ================================================================
   小蓝视频 - 青春影视传媒社区 | zLidmg.cn
   原创配色：樱花粉 #E8578B + 天空蓝 #4A90D9
   ================================================================ */

/* --- CSS Variables --- */
:root {
  --c-primary: #2980B9;
  --c-primary-dark: #C94476;
  --c-primary-light: #F9D1DE;
  --c-secondary: #27AE60;
  --c-secondary-dark: #3672B5;
  --c-accent: #E67E22;
  --c-bg: #F0F8FF;
  --c-white: #FFFFFF;
  --c-dark: #1A1A2E;
  --c-dark2: #2D2D44;
  --c-gray: #6E7191;
  --c-gray-light: #F4F5F9;
  --c-border: #EDE4E8;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(232,87,139,0.10);
  --shadow-hover: 0 8px 32px rgba(232,87,139,0.18);
  --transition: all 0.3s cubic-bezier(.4,0,.2,1);
  --max-w: 1200px;
}

/* --- 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:var(--c-dark);background:var(--c-bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:var(--c-primary);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--c-primary-dark)}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
.container{max-width:var(--max-w);margin:0 auto;padding:0 20px}

/* --- Topbar --- */
.xh-topbar{background:linear-gradient(135deg,var(--c-primary),var(--c-secondary));color:#fff;font-size:13px;padding:6px 0;text-align:center;letter-spacing:0.5px}
.xh-topbar a{color:#fff;text-decoration:underline}

/* --- Header --- */
.xh-header{background:var(--c-white);box-shadow:0 2px 16px rgba(0,0,0,0.06);position:sticky;top:0;z-index:1000}
.xh-header-inner{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;max-width:var(--max-w);margin:0 auto}
.xh-logo-link{display:flex;align-items:center;gap:8px}
.xh-logo-img{height:42px;width:auto}
.xh-nav{display:flex;gap:4px}
.xh-nav a{padding:8px 16px;border-radius:var(--radius);font-size:15px;font-weight:500;color:var(--c-dark2);transition:var(--transition)}
.xh-nav a:hover,.xh-nav a.active{background:var(--c-primary-light);color:var(--c-primary)}
.xh-hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.xh-hamburger span{width:24px;height:2.5px;background:var(--c-dark);border-radius:2px;transition:var(--transition)}

/* --- Search Bar --- */
.xh-search-bar{background:var(--c-gray-light);padding:14px 0;border-bottom:1px solid var(--c-border)}
.xh-search-wrap{max-width:600px;margin:0 auto;display:flex;gap:0;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow)}
.xh-search-input{flex:1;border:2px solid var(--c-primary-light);border-right:none;padding:10px 18px;font-size:15px;outline:none;background:#fff;border-radius:var(--radius-lg) 0 0 var(--radius-lg);transition:var(--transition)}
.xh-search-input:focus{border-color:var(--c-primary)}
.xh-search-btn{background:var(--c-primary);color:#fff;border:none;padding:10px 24px;font-size:15px;cursor:pointer;border-radius:0 var(--radius-lg) var(--radius-lg) 0;transition:var(--transition)}
.xh-search-btn:hover{background:var(--c-primary-dark)}
.xh-search-tip{text-align:center;font-size:12px;color:var(--c-gray);margin-top:8px}

/* --- Hero Slider --- */
.xh-hero{position:relative;overflow:hidden;background:var(--c-dark)}
.xh-hero-slides{display:flex;transition:transform 0.6s ease}
.xh-hero-slide{min-width:100%;position:relative}
.xh-hero-slide img{width:100%;height:420px;object-fit:cover;display:block}
.xh-hero-overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(26,26,46,0.7),transparent 60%);display:flex;align-items:flex-end;padding:40px}
.xh-hero-text{color:#fff;max-width:600px}
.xh-hero-text h2{font-size:28px;margin-bottom:8px;text-shadow:0 2px 8px rgba(0,0,0,0.3)}
.xh-hero-text p{font-size:15px;opacity:0.9}
.xh-hero-dots{position:absolute;bottom:16px;left:50%;transform:translateX(-50%);display:flex;gap:8px}
.xh-hero-dot{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,0.5);cursor:pointer;transition:var(--transition)}
.xh-hero-dot.active{background:var(--c-primary);transform:scale(1.2)}

/* --- Stats Bar --- */
.xh-stats{background:var(--c-white);padding:28px 0;border-bottom:1px solid var(--c-border)}
.xh-stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.xh-stat-item h3{font-size:30px;color:var(--c-primary);font-weight:700}
.xh-stat-item p{font-size:13px;color:var(--c-gray);margin-top:2px}

/* --- Section Common --- */
.xh-section{padding:50px 0}
.xh-section-alt{background:var(--c-white)}
.xh-section-title{text-align:center;margin-bottom:36px}
.xh-section-title h2{font-size:26px;color:var(--c-dark);margin-bottom:6px}
.xh-section-title p{font-size:14px;color:var(--c-gray)}

/* --- Video Cards --- */
.xh-video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.xh-video-card{background:var(--c-white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:var(--transition);cursor:pointer}
.xh-video-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.xh-video-thumb{position:relative;overflow:hidden;aspect-ratio:16/9}
.xh-video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 0.4s ease}
.xh-video-card:hover .xh-video-thumb img{transform:scale(1.05)}
.xh-video-play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(26,26,46,0.35);opacity:0;transition:var(--transition)}
.xh-video-card:hover .xh-video-play{opacity:1}
.xh-video-play-icon{width:56px;height:56px;background:var(--c-primary);border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 16px rgba(232,87,139,0.4)}
.xh-video-play-icon::after{content:"";display:block;width:0;height:0;border-left:20px solid #fff;border-top:12px solid transparent;border-bottom:12px solid transparent;margin-left:4px}
.xh-video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,0.7);color:#fff;font-size:12px;padding:2px 8px;border-radius:4px}
.xh-video-info{padding:14px 16px}
.xh-video-info h3{font-size:15px;font-weight:600;color:var(--c-dark);margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.xh-video-meta{display:flex;gap:12px;font-size:12px;color:var(--c-gray)}
.xh-video-meta span{display:flex;align-items:center;gap:3px}
.xh-video-tag{display:inline-block;background:var(--c-primary-light);color:var(--c-primary);font-size:11px;padding:2px 8px;border-radius:4px;margin-top:8px}

/* --- AI Module --- */
.xh-ai-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.xh-ai-card{background:var(--c-white);border-radius:var(--radius);padding:28px 20px;text-align:center;box-shadow:var(--shadow);transition:var(--transition);border:1px solid var(--c-border)}
.xh-ai-card:hover{border-color:var(--c-primary);box-shadow:var(--shadow-hover)}
.xh-ai-icon{width:56px;height:56px;margin:0 auto 14px;background:linear-gradient(135deg,var(--c-primary-light),#E8D5F5);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:26px}
.xh-ai-card h3{font-size:16px;color:var(--c-dark);margin-bottom:6px}
.xh-ai-card p{font-size:13px;color:var(--c-gray);line-height:1.6}

/* --- Channel Grid --- */
.xh-channel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.xh-channel-card{background:linear-gradient(135deg,var(--c-primary),var(--c-secondary));border-radius:var(--radius);padding:24px;color:#fff;transition:var(--transition);cursor:pointer;position:relative;overflow:hidden}
.xh-channel-card::after{content:"";position:absolute;top:-50%;right:-50%;width:100%;height:100%;background:rgba(255,255,255,0.08);border-radius:50%;transition:var(--transition)}
.xh-channel-card:hover{transform:translateY(-3px)}
.xh-channel-card:hover::after{transform:scale(2)}
.xh-channel-card h3{font-size:18px;margin-bottom:6px;position:relative;z-index:1}
.xh-channel-card p{font-size:13px;opacity:0.85;position:relative;z-index:1}
.xh-channel-card:nth-child(2){background:linear-gradient(135deg,#F0B429,#E8578B)}
.xh-channel-card:nth-child(3){background:linear-gradient(135deg,#4A90D9,#6C5CE7)}
.xh-channel-card:nth-child(4){background:linear-gradient(135deg,#00B894,#4A90D9)}
.xh-channel-card:nth-child(5){background:linear-gradient(135deg,#E17055,#D63031)}
.xh-channel-card:nth-child(6){background:linear-gradient(135deg,#A29BFE,#E8578B)}

/* --- HowTo Steps --- */
.xh-howto-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.xh-howto-step{background:var(--c-white);border-radius:var(--radius);padding:28px 20px;text-align:center;box-shadow:var(--shadow);position:relative;counter-increment:step}
.xh-howto-step::before{content:counter(step);display:flex;align-items:center;justify-content:center;width:40px;height:40px;background:var(--c-primary);color:#fff;border-radius:50%;font-size:18px;font-weight:700;margin:0 auto 14px}
.xh-howto-step h3{font-size:16px;color:var(--c-dark);margin-bottom:6px}
.xh-howto-step p{font-size:13px;color:var(--c-gray)}

/* --- Expert Cards --- */
.xh-expert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.xh-expert-card{background:var(--c-white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);text-align:center;padding-bottom:20px;transition:var(--transition)}
.xh-expert-card:hover{box-shadow:var(--shadow-hover)}
.xh-expert-avatar{width:100px;height:100px;border-radius:50%;object-fit:cover;margin:24px auto 12px;border:3px solid var(--c-primary-light)}
.xh-expert-card h3{font-size:17px;color:var(--c-dark);margin-bottom:2px}
.xh-expert-card .xh-expert-role{font-size:13px;color:var(--c-primary);margin-bottom:8px}
.xh-expert-card p{font-size:13px;color:var(--c-gray);padding:0 16px;margin-bottom:12px}
.xh-expert-btns{display:flex;gap:8px;justify-content:center}
.xh-btn{display:inline-block;padding:8px 18px;border-radius:var(--radius);font-size:13px;font-weight:500;transition:var(--transition);cursor:pointer;border:none}
.xh-btn-primary{background:var(--c-primary);color:#fff}
.xh-btn-primary:hover{background:var(--c-primary-dark);color:#fff}
.xh-btn-outline{border:1px solid var(--c-primary);color:var(--c-primary);background:transparent}
.xh-btn-outline:hover{background:var(--c-primary);color:#fff}

/* --- Reviews --- */
.xh-review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.xh-review-card{background:var(--c-white);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);border-left:4px solid var(--c-primary)}
.xh-review-stars{color:var(--c-accent);font-size:14px;margin-bottom:8px}
.xh-review-card blockquote{font-size:14px;color:var(--c-dark2);line-height:1.7;margin-bottom:10px;font-style:italic}
.xh-review-author{font-size:13px;color:var(--c-gray)}

/* --- FAQ --- */
.xh-faq-list{max-width:800px;margin:0 auto}
.xh-faq-item{background:var(--c-white);border-radius:var(--radius);margin-bottom:12px;box-shadow:var(--shadow);overflow:hidden}
.xh-faq-q{padding:16px 20px;font-size:15px;font-weight:600;color:var(--c-dark);cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:var(--transition)}
.xh-faq-q:hover{color:var(--c-primary)}
.xh-faq-q::after{content:"+";font-size:20px;color:var(--c-primary);transition:var(--transition)}
.xh-faq-item.open .xh-faq-q::after{transform:rotate(45deg)}
.xh-faq-a{max-height:0;overflow:hidden;transition:max-height 0.35s ease;padding:0 20px}
.xh-faq-item.open .xh-faq-a{max-height:300px;padding:0 20px 16px}
.xh-faq-a p{font-size:14px;color:var(--c-gray);line-height:1.7}

/* --- Partners --- */
.xh-partner-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:24px;align-items:center}
.xh-partner-item{background:var(--c-white);border-radius:var(--radius);padding:16px 28px;box-shadow:var(--shadow);font-size:15px;font-weight:600;color:var(--c-gray);transition:var(--transition);border:1px solid var(--c-border)}
.xh-partner-item:hover{border-color:var(--c-primary);color:var(--c-primary)}

/* --- Tags Cloud --- */
.xh-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:10px}
.xh-tags a{display:inline-block;background:var(--c-white);border:1px solid var(--c-border);color:var(--c-dark2);padding:6px 16px;border-radius:var(--radius-lg);font-size:13px;transition:var(--transition)}
.xh-tags a:hover{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}

/* --- Contact --- */
.xh-contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:start}
.xh-contact-info h3{font-size:18px;color:var(--c-dark);margin-bottom:14px}
.xh-contact-info p{font-size:14px;color:var(--c-gray);margin-bottom:8px;line-height:1.7}
.xh-contact-qr{display:flex;gap:20px}
.xh-contact-qr-item{text-align:center}
.xh-contact-qr-item img{width:140px;height:140px;border-radius:var(--radius);border:2px solid var(--c-border)}
.xh-contact-qr-item p{font-size:12px;color:var(--c-gray);margin-top:6px}

/* --- Share --- */
.xh-share{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.xh-share a{display:inline-flex;align-items:center;gap:4px;padding:8px 16px;border-radius:var(--radius);font-size:13px;color:#fff;transition:var(--transition)}
.xh-share a:hover{opacity:0.85;color:#fff}
.xh-share-wechat{background:#07C160}
.xh-share-weibo{background:#E6162D}
.xh-share-douyin{background:#161823}
.xh-share-bilibili{background:#00A1D6}

/* --- Footer --- */
.xh-footer{background:var(--c-dark);color:rgba(255,255,255,0.7);padding:40px 0 20px}
.xh-footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px;margin-bottom:24px}
.xh-footer h4{color:#fff;font-size:16px;margin-bottom:12px}
.xh-footer p{font-size:13px;line-height:1.8}
.xh-footer a{color:rgba(255,255,255,0.7);transition:var(--transition)}
.xh-footer a:hover{color:var(--c-primary)}
.xh-footer-links{display:flex;flex-direction:column;gap:6px}
.xh-footer-bottom{border-top:1px solid rgba(255,255,255,0.1);padding-top:16px;text-align:center;font-size:12px}
.xh-footer-logo{height:36px;margin-bottom:12px;filter:brightness(0) invert(1)}

/* --- Breadcrumb --- */
.xh-breadcrumb{padding:14px 0;font-size:13px;color:var(--c-gray)}
.xh-breadcrumb a{color:var(--c-primary)}
.xh-breadcrumb span{margin:0 6px;color:var(--c-border)}

/* --- Page Hero --- */
.xh-page-hero{background:linear-gradient(135deg,var(--c-primary),var(--c-secondary));color:#fff;padding:48px 0;text-align:center}
.xh-page-hero h1{font-size:30px;margin-bottom:8px}
.xh-page-hero p{font-size:15px;opacity:0.9}

/* --- 404 --- */
.xh-404{text-align:center;padding:80px 20px}
.xh-404 h1{font-size:72px;color:var(--c-primary);margin-bottom:12px}
.xh-404 p{font-size:18px;color:var(--c-gray);margin-bottom:24px}

/* --- MCP Placeholder --- */
.xh-mcp-bar{background:var(--c-gray-light);border:1px dashed var(--c-border);border-radius:var(--radius);padding:16px;text-align:center;font-size:13px;color:var(--c-gray);margin:20px 0}

/* --- Responsive --- */
@media(max-width:1024px){
  .xh-video-grid,.xh-channel-grid,.xh-expert-grid{grid-template-columns:repeat(2,1fr)}
  .xh-ai-grid,.xh-howto-grid{grid-template-columns:repeat(2,1fr)}
  .xh-stats-grid{grid-template-columns:repeat(2,1fr)}
  .xh-footer-grid{grid-template-columns:1fr}
}
@media(max-width:768px){
  .xh-nav{display:none;position:absolute;top:100%;left:0;right:0;background:var(--c-white);flex-direction:column;padding:12px;box-shadow:var(--shadow)}
  .xh-nav.open{display:flex}
  .xh-hamburger{display:flex}
  .xh-hero-slide img{height:240px}
  .xh-hero-text h2{font-size:20px}
  .xh-video-grid,.xh-channel-grid,.xh-ai-grid,.xh-howto-grid,.xh-expert-grid{grid-template-columns:1fr}
  .xh-review-grid{grid-template-columns:1fr}
  .xh-contact-grid{grid-template-columns:1fr}
  .xh-stats-grid{grid-template-columns:repeat(2,1fr)}
  .xh-section{padding:32px 0}
  .xh-section-title h2{font-size:22px}
  .xh-footer-grid{grid-template-columns:1fr}
}