/* =====================================================
   丝瓜视频 - 主样式文件
   官网：czxxjd.cn
   ===================================================== */

/* ---- CSS 变量 ---- */
:root {
  --primary: #E8336D;
  --primary-dark: #C4245A;
  --primary-light: #FF6B9D;
  --accent: #FF6B35;
  --accent2: #7C3AED;
  --bg: #0D1117;
  --bg2: #161B22;
  --bg3: #1C2333;
  --card: #1E2A3A;
  --card2: #243040;
  --border: rgba(255,255,255,.07);
  --text: #E6EDF3;
  --muted: #8A9BB0;
  --muted2: #5A6A7A;
  --white: #FFFFFF;
  --font: 'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0,0,0,.4);
  --shadow-card: 0 2px 16px rgba(0,0,0,.3);
  --transition: .25s cubic-bezier(.4,0,.2,1);
  --header-h: 64px;
}

/* ---- 重置 ---- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;font-size:16px;}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;height:auto;display:block;}
ul,ol{list-style:none;}
button{cursor:pointer;border:none;background:none;font-family:inherit;}
input,textarea,select{font-family:inherit;}

/* ---- 滚动条 ---- */
::-webkit-scrollbar{width:6px;height:6px;}
::-webkit-scrollbar-track{background:var(--bg2);}
::-webkit-scrollbar-thumb{background:var(--primary);border-radius:3px;}

/* ====================================================
   HEADER
   ==================================================== */
.site-header{
  position:sticky;top:0;z-index:900;
  height:var(--header-h);
  background:rgba(13,17,23,.92);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
}
.header-inner{
  max-width:1320px;margin:0 auto;padding:0 24px;
  height:100%;display:flex;align-items:center;gap:16px;
}

/* Logo */
.site-logo{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-icon{width:38px;height:38px;border-radius:10px;object-fit:contain;background:linear-gradient(135deg,#E8336D,#FF6B35);padding:2px;}
.logo-text{font-size:1.15rem;font-weight:800;background:linear-gradient(135deg,#E8336D,#FF6B35);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;white-space:nowrap;}

/* 主导航 */
.site-nav{display:flex;align-items:center;gap:2px;flex:1;justify-content:center;flex-wrap:nowrap;}
.site-nav a{
  padding:6px 10px;border-radius:8px;font-size:.82rem;font-weight:500;color:var(--muted);
  transition:color var(--transition),background var(--transition);white-space:nowrap;
}
.site-nav a:hover,.site-nav a.active{color:var(--white);background:rgba(232,51,109,.12);}
.site-nav a.active{color:var(--primary);}

/* 搜索框 */
.header-search{display:flex;align-items:center;gap:0;background:var(--card);border:1px solid var(--border);border-radius:24px;overflow:hidden;flex-shrink:0;}
.header-search input{background:none;border:none;outline:none;color:var(--text);padding:7px 14px;font-size:.82rem;width:180px;}
.header-search input::placeholder{color:var(--muted2);}
.search-btn{padding:7px 14px;color:var(--muted);font-size:.88rem;transition:color var(--transition);}
.search-btn:hover{color:var(--primary);}

/* 操作按钮 */
.header-actions{display:flex;align-items:center;gap:8px;flex-shrink:0;}
.btn-login{padding:6px 16px;border-radius:20px;font-size:.82rem;font-weight:600;color:var(--muted);border:1px solid var(--border);transition:all var(--transition);}
.btn-login:hover{color:var(--white);border-color:var(--primary);}
.btn-join{padding:6px 16px;border-radius:20px;font-size:.82rem;font-weight:600;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;transition:opacity var(--transition);}
.btn-join:hover{opacity:.85;}

/* 移动端菜单按钮 */
.nav-toggle{display:none;font-size:1.3rem;color:var(--text);padding:6px;}

/* ====================================================
   MOBILE NAV
   ==================================================== */
.mobile-nav{position:fixed;inset:0;z-index:1000;pointer-events:none;}
.mobile-nav.open{pointer-events:auto;}
.mobile-nav-overlay{position:absolute;inset:0;background:rgba(0,0,0,.6);opacity:0;transition:opacity .3s;}
.mobile-nav.open .mobile-nav-overlay{opacity:1;}
.mobile-nav-drawer{
  position:absolute;left:0;top:0;bottom:0;width:280px;
  background:var(--bg2);padding:24px 20px;
  transform:translateX(-100%);transition:transform .3s;
  overflow-y:auto;
}
.mobile-nav.open .mobile-nav-drawer{transform:translateX(0);}
.mobile-nav-close{font-size:1.2rem;color:var(--muted);margin-bottom:20px;display:block;}
.mobile-nav-links{display:flex;flex-direction:column;gap:4px;}
.mobile-nav-links a{padding:10px 14px;border-radius:8px;font-size:.9rem;color:var(--muted);transition:all var(--transition);}
.mobile-nav-links a:hover,.mobile-nav-links a.active{color:var(--white);background:rgba(232,51,109,.12);}

/* ====================================================
   BREADCRUMB
   ==================================================== */
.breadcrumb{background:var(--bg2);border-bottom:1px solid var(--border);}
.breadcrumb-inner{max-width:1320px;margin:0 auto;padding:10px 24px;font-size:.8rem;color:var(--muted2);}
.breadcrumb-inner a{color:var(--muted);transition:color var(--transition);}
.breadcrumb-inner a:hover{color:var(--primary);}
.breadcrumb-inner .sep{margin:0 8px;color:var(--muted2);}
.breadcrumb-inner .current{color:var(--primary);}

/* ====================================================
   PAGE HERO (内页)
   ==================================================== */
.page-hero{
  background:linear-gradient(135deg,var(--bg2),var(--bg3));
  border-bottom:1px solid var(--border);
  padding:48px 24px;text-align:center;
}
.page-hero h1{font-size:clamp(1.6rem,4vw,2.4rem);font-weight:800;color:var(--white);margin-bottom:12px;}
.page-hero h1 span{color:var(--primary);}
.page-hero p{color:var(--muted);font-size:.92rem;max-width:600px;margin:0 auto;}

/* ====================================================
   HERO BANNER (首页)
   ==================================================== */
.hero{position:relative;min-height:88vh;display:flex;align-items:center;overflow:hidden;}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;background-repeat:no-repeat;}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(13,17,23,.92) 0%,rgba(13,17,23,.7) 60%,rgba(13,17,23,.4) 100%);}
.hero-content{position:relative;z-index:2;max-width:1320px;margin:0 auto;padding:80px 24px 60px;width:100%;}
.hero-tag{display:inline-flex;align-items:center;gap:8px;background:rgba(232,51,109,.15);border:1px solid rgba(232,51,109,.3);color:var(--primary-light);padding:6px 16px;border-radius:20px;font-size:.8rem;font-weight:600;margin-bottom:24px;}
.hero-content h1{font-size:clamp(2rem,6vw,3.8rem);font-weight:900;color:var(--white);line-height:1.2;margin-bottom:20px;max-width:700px;}
.hero-content h1 span{background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;}
.hero-content p{font-size:clamp(.9rem,2vw,1.05rem);color:var(--muted);max-width:580px;margin-bottom:32px;line-height:1.8;}
.hero-btns{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:48px;}
.btn-primary{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;border-radius:28px;font-size:.9rem;font-weight:700;transition:all var(--transition);box-shadow:0 4px 20px rgba(232,51,109,.4);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 32px rgba(232,51,109,.5);}
.btn-outline{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border:2px solid rgba(255,255,255,.2);color:var(--white);border-radius:28px;font-size:.9rem;font-weight:700;transition:all var(--transition);}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px);}
.hero-stats{display:flex;gap:40px;flex-wrap:wrap;}
.hero-stat .num{font-size:1.6rem;font-weight:900;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;}
.hero-stat .label{font-size:.75rem;color:var(--muted);}

/* ====================================================
   STATS BAR
   ==================================================== */
.stats-bar{background:linear-gradient(135deg,var(--primary),var(--accent));padding:20px 24px;}
.stats-inner{max-width:1320px;margin:0 auto;display:flex;justify-content:space-around;flex-wrap:wrap;gap:16px;}
.stat-item{text-align:center;}
.stat-item .num{font-size:1.5rem;font-weight:900;color:#fff;}
.stat-item .label{font-size:.72rem;color:rgba(255,255,255,.8);margin-top:2px;}

/* ====================================================
   SECTION
   ==================================================== */
.section{padding:64px 24px;}
.section-dark{background:var(--bg);}
.section-alt{background:var(--bg2);}
.section-purple{background:linear-gradient(135deg,#0D0A1E,#1A0F2E);}
.section-inner{max-width:1320px;margin:0 auto;}
.text-center{text-align:center;}
.section-header{margin-bottom:8px;}
.section-tag{display:inline-block;background:rgba(232,51,109,.12);color:var(--primary);font-size:.72rem;font-weight:700;letter-spacing:.08em;padding:4px 12px;border-radius:12px;margin-bottom:10px;text-transform:uppercase;}
.section-title{font-size:clamp(1.4rem,3vw,2rem);font-weight:800;color:var(--white);margin-bottom:8px;}
.section-title span{color:var(--primary);}
.section-desc{font-size:.88rem;color:var(--muted);line-height:1.7;}
.section-more{font-size:.82rem;font-weight:600;color:var(--primary);transition:opacity var(--transition);white-space:nowrap;}
.section-more:hover{opacity:.75;}

/* ====================================================
   FILTER TABS
   ==================================================== */
.filter-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0 24px;}
.filter-tab{padding:7px 16px;border-radius:20px;font-size:.8rem;font-weight:600;color:var(--muted);background:var(--card);border:1px solid var(--border);transition:all var(--transition);}
.filter-tab:hover{color:var(--white);border-color:rgba(232,51,109,.4);}
.filter-tab.active{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;border-color:transparent;}

/* ====================================================
   VIDEO GRID & CARDS
   ==================================================== */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px;}
.video-card{
  background:var(--card);border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--border);transition:all var(--transition);cursor:pointer;
}
.video-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(232,51,109,.3);}
.video-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg3);}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s;}
.video-card:hover .video-thumb img{transform:scale(1.05);}
.play-overlay{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  background:rgba(0,0,0,.4);opacity:0;transition:opacity var(--transition);
}
.video-card:hover .play-overlay{opacity:1;}
.play-btn{
  width:52px;height:52px;border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:1.1rem;padding-left:4px;
  box-shadow:0 4px 20px rgba(232,51,109,.5);
  transition:transform var(--transition);
}
.video-card:hover .play-btn{transform:scale(1.1);}
.video-badge{
  position:absolute;top:10px;left:10px;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  color:#fff;font-size:.68rem;font-weight:700;padding:3px 9px;border-radius:10px;
}
.video-duration{
  position:absolute;bottom:10px;right:10px;
  background:rgba(0,0,0,.75);color:#fff;font-size:.7rem;padding:2px 8px;border-radius:6px;
}
.video-info{padding:14px;}
.video-title{font-size:.85rem;font-weight:600;color:var(--white);line-height:1.5;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.video-meta{display:flex;gap:12px;font-size:.72rem;color:var(--muted2);margin-bottom:10px;flex-wrap:wrap;}
.video-author{display:flex;align-items:center;gap:8px;}
.author-avatar{width:26px;height:26px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;font-size:.65rem;font-weight:700;color:#fff;flex-shrink:0;}
.author-name{font-size:.75rem;color:var(--muted);}

/* ====================================================
   MODULE CARDS
   ==================================================== */
.modules-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px;}
.module-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:24px 20px;transition:all var(--transition);
}
.module-card:hover{transform:translateY(-3px);border-color:rgba(232,51,109,.3);box-shadow:var(--shadow-card);}
.module-icon{font-size:2rem;margin-bottom:12px;}
.module-title{font-size:.92rem;font-weight:700;color:var(--white);margin-bottom:8px;}
.module-desc{font-size:.8rem;color:var(--muted);line-height:1.7;}

/* ====================================================
   AI CARDS
   ==================================================== */
.ai-features{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px;}
.ai-card{
  background:rgba(124,58,237,.08);border:1px solid rgba(124,58,237,.2);
  border-radius:var(--radius);padding:24px;transition:all var(--transition);
}
.ai-card:hover{transform:translateY(-3px);border-color:rgba(124,58,237,.4);box-shadow:0 4px 24px rgba(124,58,237,.2);}
.ai-icon{font-size:2rem;margin-bottom:12px;}
.ai-title{font-size:.95rem;font-weight:700;color:var(--white);margin-bottom:8px;}
.ai-desc{font-size:.8rem;color:var(--muted);line-height:1.7;}

/* ====================================================
   COMMUNITY CARDS
   ==================================================== */
.community-features{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;}
.community-card{
  display:flex;align-items:flex-start;gap:16px;
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px;transition:all var(--transition);
}
.community-card:hover{transform:translateY(-2px);border-color:rgba(232,51,109,.3);}
.community-icon{font-size:1.8rem;flex-shrink:0;}
.community-title{font-size:.9rem;font-weight:700;color:var(--white);margin-bottom:6px;}
.community-desc{font-size:.78rem;color:var(--muted);line-height:1.7;}

/* ====================================================
   EXPERT CARDS
   ==================================================== */
.experts-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;}
.expert-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:28px 24px;text-align:center;transition:all var(--transition);
}
.expert-card:hover{transform:translateY(-4px);border-color:rgba(232,51,109,.3);box-shadow:var(--shadow);}
.expert-avatar{width:88px;height:88px;border-radius:50%;object-fit:cover;margin:0 auto 14px;border:3px solid var(--primary);}
.expert-name{font-size:1.05rem;font-weight:800;color:var(--white);margin-bottom:4px;}
.expert-role{font-size:.78rem;color:var(--primary);margin-bottom:12px;}
.expert-bio{font-size:.8rem;color:var(--muted);line-height:1.7;margin-bottom:14px;}
.expert-tags{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin-bottom:16px;}
.tag{background:rgba(232,51,109,.1);color:var(--primary-light);font-size:.68rem;font-weight:600;padding:3px 10px;border-radius:10px;}
.expert-btns{display:flex;gap:8px;justify-content:center;}
.btn-sm{padding:6px 14px;border-radius:16px;font-size:.75rem;font-weight:600;transition:all var(--transition);}
.btn-sm-primary{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;}
.btn-sm-outline{border:1px solid var(--border);color:var(--muted);}
.btn-sm-outline:hover{border-color:var(--primary);color:var(--primary);}

/* ====================================================
   PARTNERS
   ==================================================== */
.partners-row{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;}
.partner-logo{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:14px 24px;font-size:.85rem;font-weight:600;color:var(--muted);
  transition:all var(--transition);
}
.partner-logo:hover{color:var(--white);border-color:rgba(232,51,109,.3);}

/* ====================================================
   STEPS
   ==================================================== */
.steps-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px;}
.step-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:28px 20px;text-align:center;transition:all var(--transition);
}
.step-card:hover{transform:translateY(-3px);border-color:rgba(232,51,109,.3);}
.step-num{
  width:52px;height:52px;border-radius:50%;margin:0 auto 16px;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  display:flex;align-items:center;justify-content:center;
  font-size:1rem;font-weight:900;color:#fff;
}
.step-title{font-size:.92rem;font-weight:700;color:var(--white);margin-bottom:8px;}
.step-desc{font-size:.8rem;color:var(--muted);line-height:1.7;}

/* ====================================================
   CONTACT
   ==================================================== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start;}
.contact-info{display:flex;flex-direction:column;gap:16px;}
.contact-item{display:flex;align-items:flex-start;gap:14px;}
.contact-icon{font-size:1.3rem;flex-shrink:0;margin-top:2px;}
.contact-label{font-size:.75rem;color:var(--muted2);margin-bottom:2px;}
.contact-value{font-size:.9rem;color:var(--white);font-weight:600;}

/* ====================================================
   REVIEWS
   ==================================================== */
.reviews-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;}
.review-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:24px;transition:all var(--transition);
}
.review-card:hover{transform:translateY(-2px);border-color:rgba(232,51,109,.2);}
.review-stars{color:#FFD700;font-size:1rem;margin-bottom:12px;letter-spacing:2px;}
.review-text{font-size:.83rem;color:var(--muted);line-height:1.8;margin-bottom:16px;}
.review-author{display:flex;align-items:center;gap:10px;}
.review-avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:700;color:#fff;flex-shrink:0;}
.review-name{font-size:.85rem;font-weight:700;color:var(--white);}
.review-date{font-size:.72rem;color:var(--muted2);}

/* ====================================================
   FAQ
   ==================================================== */
.faq-list{display:flex;flex-direction:column;gap:10px;}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;
  padding:16px 20px;font-size:.88rem;font-weight:600;color:var(--white);
  text-align:left;transition:background var(--transition);
}
.faq-q:hover{background:rgba(232,51,109,.06);}
.faq-icon{font-size:1.2rem;color:var(--primary);transition:transform .3s;flex-shrink:0;}
.faq-item.open .faq-icon{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;font-size:.82rem;color:var(--muted);line-height:1.8;transition:max-height .3s,padding .3s;padding:0 20px;}
.faq-item.open .faq-a{max-height:200px;padding:0 20px 16px;}

/* ====================================================
   SHARE BAR
   ==================================================== */
.share-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.share-label{font-size:.82rem;color:var(--muted);}
.share-btn{padding:8px 18px;border-radius:20px;font-size:.8rem;font-weight:600;background:var(--card);border:1px solid var(--border);color:var(--muted);transition:all var(--transition);}
.share-btn:hover{color:var(--white);border-color:var(--primary);background:rgba(232,51,109,.1);}

/* ====================================================
   QR CODE
   ==================================================== */
.qr-row{display:flex;gap:20px;flex-wrap:wrap;}
.qr-item{text-align:center;}
.qr-item img{border-radius:8px;border:2px solid var(--border);}
.qr-label{font-size:.72rem;color:var(--muted);margin-top:6px;}

/* ====================================================
   FOOTER
   ==================================================== */
.site-footer{background:var(--bg2);border-top:1px solid var(--border);padding:48px 24px 0;}
.footer-inner{max-width:1320px;margin:0 auto;}
.footer-top{display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;gap:40px;padding-bottom:40px;border-bottom:1px solid var(--border);}
.footer-brand p{font-size:.8rem;color:var(--muted);line-height:1.8;}
.footer-col h4{font-size:.88rem;font-weight:700;color:var(--white);margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:8px;}
.footer-col ul li a{font-size:.8rem;color:var(--muted);transition:color var(--transition);}
.footer-col ul li a:hover{color:var(--primary);}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;padding:20px 0;}
.footer-copy{font-size:.75rem;color:var(--muted2);}
.footer-copy a{color:var(--primary);}
.update-time{font-size:.72rem;color:var(--muted2);margin-top:4px;}
.footer-links{display:flex;gap:16px;flex-wrap:wrap;}
.footer-links a{font-size:.75rem;color:var(--muted2);transition:color var(--transition);}
.footer-links a:hover{color:var(--primary);}

/* ====================================================
   RESPONSIVE
   ==================================================== */
@media (max-width:1100px){
  .site-nav{display:none;}
  .header-search{display:none;}
  .header-actions{display:none;}
  .nav-toggle{display:block;}
  .footer-top{grid-template-columns:1fr 1fr;}
}

@media (max-width:768px){
  .hero{min-height:70vh;}
  .hero-content{padding:60px 20px 40px;}
  .hero-stats{gap:24px;}
  .stats-inner{gap:12px;}
  .stat-item .num{font-size:1.2rem;}
  .section{padding:40px 20px;}
  .video-grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px;}
  .contact-grid{grid-template-columns:1fr;}
  .footer-top{grid-template-columns:1fr 1fr;}
  .experts-grid{grid-template-columns:1fr;}
  .ai-features{grid-template-columns:1fr;}
  .steps-grid{grid-template-columns:1fr 1fr;}
}

@media (max-width:480px){
  .hero-btns{flex-direction:column;align-items:flex-start;}
  .btn-primary,.btn-outline{width:100%;justify-content:center;}
  .video-grid{grid-template-columns:1fr;}
  .footer-top{grid-template-columns:1fr;}
  .steps-grid{grid-template-columns:1fr;}
  .modules-grid{grid-template-columns:1fr;}
  .community-features{grid-template-columns:1fr;}
  .reviews-grid{grid-template-columns:1fr;}
  .filter-tabs{gap:6px;}
  .filter-tab{font-size:.72rem;padding:5px 12px;}
}

/* ====================================================
   UTILITIES
   ==================================================== */
.hidden{display:none!important;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

/* ====================================================
   ENTERTAINMENT GRID（娱乐专区）
   ==================================================== */
.ent-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.ent-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:24px;display:flex;align-items:flex-start;gap:16px;transition:all var(--transition);
}
.ent-card:hover{transform:translateY(-3px);border-color:rgba(232,51,109,.3);box-shadow:var(--shadow-card);}
.ent-card-wide{grid-column:1/-1;}
.ent-icon{font-size:2rem;flex-shrink:0;}
.ent-title{font-size:.95rem;font-weight:700;color:var(--white);margin-bottom:8px;}
.ent-desc{font-size:.8rem;color:var(--muted);line-height:1.7;}
.ent-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px;}

@media (max-width:768px){
  .ent-grid{grid-template-columns:1fr;}
  .ent-card-wide{grid-column:auto;}
}

/* ====================================================
   STATS BAR 响应式补充
   ==================================================== */
@media (max-width:480px){
  .stats-bar{padding:16px 20px;}
  .stats-inner{justify-content:center;gap:20px;}
  .stat-item .num{font-size:1.1rem;}
  .stat-item .label{font-size:.65rem;}
}

/* ====================================================
   CONTACT GRID 响应式补充
   ==================================================== */
@media (max-width:600px){
  .contact-grid{grid-template-columns:1fr;gap:24px;}
}

/* ====================================================
   FOOTER 响应式补充
   ==================================================== */
@media (max-width:600px){
  .footer-top{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .footer-links{flex-wrap:wrap;gap:10px;}
}

/* ====================================================
   HERO 响应式补充
   ==================================================== */
@media (max-width:360px){
  .hero-content h1{font-size:1.6rem;}
  .hero-stat .num{font-size:1.2rem;}
}

/* ====================================================
   PAGE HERO 响应式
   ==================================================== */
@media (max-width:480px){
  .page-hero{padding:32px 20px;}
  .page-hero h1{font-size:1.4rem;}
}

/* ====================================================
   VIDEO CARD 触摸设备播放按钮始终可见
   ==================================================== */
@media (hover:none){
  .play-overlay{opacity:1;background:rgba(0,0,0,.25);}
  .play-btn{transform:scale(.85);}
}

/* ====================================================
   MOBILE NAV 响应式补充
   ==================================================== */
@media (max-width:360px){
  .mobile-nav-drawer{width:260px;}
}

/* ====================================================
   BREADCRUMB 响应式
   ==================================================== */
@media (max-width:480px){
  .breadcrumb-inner{font-size:.72rem;padding:8px 16px;}
}

/* ====================================================
   EXPERT CARD 响应式补充
   ==================================================== */
@media (max-width:600px){
  .experts-grid{grid-template-columns:1fr;}
}

/* ====================================================
   SECTION INNER 最大宽度保护
   ==================================================== */
@media (max-width:480px){
  .section-inner{padding:0;}
  .section{padding:36px 16px;}
}

/* ====================================================
   SHARE BAR 响应式
   ==================================================== */
@media (max-width:480px){
  .share-bar{justify-content:center;}
  .share-label{width:100%;text-align:center;}
}

/* ====================================================
   PRINT 优化（百度抓取友好）
   ==================================================== */
@media print{
  .site-header,.mobile-nav,.hero-btns,.share-bar,.filter-tabs{display:none;}
  body{background:#fff;color:#000;}
  a{color:#E8336D;}
}