/* =============================================
   网红主播 - 主样式文件（完整版）
   品牌：网红主播 | 域名：chfi2u.cn
   百度SEO EEAT标准 | 原创设计
   ============================================= */

/* ---- CSS变量 ---- */
:root {
  --primary: #7C3AED;
  --primary-dark: #5B21B6;
  --accent: #EC4899;
  --accent-light: #F472B6;
  --bg-dark: #0D0A1A;
  --bg-card: #1A1530;
  --bg-card2: #221C3A;
  --text-main: #F0EAF8;
  --text-muted: #A89BC2;
  --border: #2E2550;
  --gradient-main: linear-gradient(135deg, #7C3AED 0%, #EC4899 100%);
  --gradient-dark: linear-gradient(180deg, #0D0A1A 0%, #1A1530 100%);
  --shadow-glow: 0 0 30px rgba(124,58,237,0.35);
  --shadow-card: 0 4px 24px rgba(0,0,0,0.45);
  --radius: 14px;
  --radius-sm: 8px;
  --transition: 0.28s cubic-bezier(.4,0,.2,1);
}

/* ---- 重置 ---- */
*,*::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',sans-serif;
  background:var(--bg-dark);
  color:var(--text-main);
  line-height:1.7;
  overflow-x:hidden;
}
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;}

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

/* ============ HEADER ============ */
#site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(13,10,26,0.92);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
  transition:var(--transition);
}
#site-header.scrolled{
  background:rgba(13,10,26,0.98);
  box-shadow:0 2px 20px rgba(0,0,0,0.5);
}
.header-inner{
  max-width:1280px;margin:0 auto;
  display:flex;align-items:center;gap:20px;
  padding:0 24px;height:70px;
}
.site-logo{
  display:flex;align-items:center;gap:10px;flex-shrink:0;
}
.site-logo img.logo-img{height:42px;width:auto;}
.site-logo img.logo-icon{height:36px;width:36px;border-radius:8px;object-fit:cover;}
.logo-text{
  font-size:1.25rem;font-weight:800;
  background:var(--gradient-main);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
  white-space:nowrap;
}

/* 导航 */
.main-nav{flex:1;display:flex;align-items:center;justify-content:center;}
.nav-list{display:flex;align-items:center;gap:4px;}
.nav-list a{
  padding:8px 12px;border-radius:var(--radius-sm);
  font-size:0.88rem;font-weight:500;color:var(--text-muted);
  transition:var(--transition);white-space:nowrap;
}
.nav-list a:hover,.nav-list a.active{
  color:var(--text-main);
  background:rgba(124,58,237,0.18);
}
.nav-list a.active{color:#fff;}

/* 搜索框 */
.header-search{
  display:flex;align-items:center;gap:8px;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:24px;padding:6px 14px;
  transition:var(--transition);
  flex-shrink:0;
}
.header-search:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(124,58,237,0.2);}
.header-search input{
  background:none;border:none;outline:none;
  color:var(--text-main);font-size:0.88rem;width:150px;
}
.header-search input::placeholder{color:var(--text-muted);}
.header-search button{
  color:var(--text-muted);transition:var(--transition);
  display:flex;align-items:center;
}
.header-search button:hover{color:var(--accent);}

/* 汉堡菜单 */
.menu-toggle{display:none;flex-direction:column;gap:5px;padding:4px;}
.menu-toggle span{
  display:block;width:24px;height:2px;
  background:var(--text-main);border-radius:2px;
  transition:var(--transition);
}
.menu-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.menu-toggle.active span:nth-child(2){opacity:0;}
.menu-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ============ HERO BANNER ============ */
.hero-banner{
  position:relative;min-height:100vh;
  display:flex;align-items:center;justify-content:center;
  overflow:hidden;padding-top:70px;
}
.hero-bg{
  position:absolute;inset:0;
  background-image:url('../images/banner.jpg');
  background-size:cover;background-position:center;
  transform:scale(1.05);
  transition:transform 8s ease;
}
.hero-bg::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(13,10,26,0.35) 0%,rgba(13,10,26,0.72) 55%,rgba(13,10,26,1) 100%);
}
.hero-banner:hover .hero-bg{transform:scale(1.0);}
.hero-content{
  position:relative;z-index:2;
  text-align:center;max-width:860px;padding:40px 24px;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(124,58,237,0.2);border:1px solid rgba(124,58,237,0.4);
  border-radius:24px;padding:6px 18px;margin-bottom:24px;
  font-size:0.82rem;color:var(--accent-light);
}
.hero-badge .dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--accent);animation:pulse 2s infinite;
}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1);}50%{opacity:0.6;transform:scale(1.3);}}
.hero-title{
  font-size:clamp(2.2rem,5vw,4rem);font-weight:900;
  line-height:1.15;margin-bottom:20px;
  text-shadow:0 2px 20px rgba(0,0,0,0.5);
}
.hero-title .brand{
  background:var(--gradient-main);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero-desc{
  font-size:1.05rem;color:var(--text-muted);
  max-width:640px;margin:0 auto 36px;line-height:1.8;
}
.hero-stats{
  display:flex;justify-content:center;gap:40px;margin-bottom:40px;
  flex-wrap:wrap;
}
.hero-stat{text-align:center;}
.hero-stat .num{
  font-size:2rem;font-weight:800;
  background:var(--gradient-main);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero-stat .label{font-size:0.82rem;color:var(--text-muted);}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;}
.btn-primary{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--gradient-main);color:#fff;
  padding:13px 32px;border-radius:50px;font-weight:700;font-size:1rem;
  transition:var(--transition);box-shadow:0 4px 20px rgba(124,58,237,0.4);
  border:none;
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(124,58,237,0.55);}
.btn-outline{
  display:inline-flex;align-items:center;gap:8px;
  border:2px solid rgba(255,255,255,0.25);color:#fff;
  padding:11px 28px;border-radius:50px;font-weight:600;font-size:1rem;
  transition:var(--transition);
}
.btn-outline:hover{border-color:var(--accent);background:rgba(236,72,153,0.1);}

/* 滚动提示 */
.scroll-hint{
  position:absolute;bottom:32px;left:50%;transform:translateX(-50%);
  z-index:2;display:flex;flex-direction:column;align-items:center;gap:6px;
  color:var(--text-muted);font-size:0.78rem;
  animation:bounce 2.5s infinite;
}
@keyframes bounce{0%,100%{transform:translateX(-50%) translateY(0);}50%{transform:translateX(-50%) translateY(8px);}}
.scroll-hint svg{width:20px;height:20px;}

/* ============ 通用区块 ============ */
.section{padding:80px 0;}
.section-alt{background:var(--bg-card);}
.container{max-width:1280px;margin:0 auto;padding:0 24px;}
.section-header{text-align:center;margin-bottom:56px;}
.section-tag{
  display:inline-block;
  background:rgba(124,58,237,0.15);
  border:1px solid rgba(124,58,237,0.3);
  color:var(--accent-light);border-radius:20px;
  padding:4px 16px;font-size:0.8rem;margin-bottom:14px;
}
.section-title{
  font-size:clamp(1.6rem,3vw,2.4rem);font-weight:800;
  margin-bottom:14px;
}
.section-title span{
  background:var(--gradient-main);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.section-desc{color:var(--text-muted);font-size:1rem;max-width:560px;margin:0 auto;}

/* ============ 视频卡片（核心交互） ============ */
.video-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(280px,1fr));
  gap:24px;
}
.video-card{
  background:var(--bg-card);border-radius:var(--radius);
  overflow:hidden;border:1px solid var(--border);
  transition:var(--transition);cursor:pointer;
  position:relative;
}
.video-card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-glow);
  border-color:rgba(124,58,237,0.5);
}
.video-thumb{
  position:relative;overflow:hidden;
  aspect-ratio:16/9;
}
.video-thumb img{
  width:100%;height:100%;object-fit:cover;
  transition:transform 0.5s ease;
}
.video-card:hover .video-thumb img{transform:scale(1.08);}

/* 播放按钮覆盖层（鼠标移入显示） */
.play-overlay{
  position:absolute;inset:0;
  display:flex;align-items:center;justify-content:center;
  background:rgba(0,0,0,0);
  transition:var(--transition);
}
.video-card:hover .play-overlay{background:rgba(0,0,0,0.42);}
.play-btn{
  width:60px;height:60px;border-radius:50%;
  background:var(--gradient-main);
  display:flex;align-items:center;justify-content:center;
  opacity:0;transform:scale(0.65);
  transition:var(--transition);
  box-shadow:0 4px 24px rgba(124,58,237,0.55);
}
.video-card:hover .play-btn{opacity:1;transform:scale(1);}
.play-btn svg{width:24px;height:24px;fill:#fff;margin-left:4px;}

.video-duration{
  position:absolute;bottom:10px;right:10px;
  background:rgba(0,0,0,0.78);color:#fff;
  font-size:0.75rem;padding:2px 8px;border-radius:4px;
  font-weight:600;
}
.video-tag{
  position:absolute;top:10px;left:10px;
  background:var(--gradient-main);color:#fff;
  font-size:0.72rem;padding:3px 10px;border-radius:4px;font-weight:600;
}
.video-info{padding:16px;}
.video-title{
  font-size:0.95rem;font-weight:700;
  margin-bottom:10px;line-height:1.4;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.video-meta{
  display:flex;align-items:center;gap:12px;
  font-size:0.78rem;color:var(--text-muted);
}
.video-meta span{display:flex;align-items:center;gap:4px;}
.video-meta svg{width:13px;height:13px;}

/* ============ 专家卡片 ============ */
.experts-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(240px,1fr));
  gap:24px;
}
.expert-card{
  background:var(--bg-card);border-radius:var(--radius);
  padding:28px 20px;text-align:center;
  border:1px solid var(--border);
  transition:var(--transition);
}
.expert-card:hover{
  transform:translateY(-4px);
  border-color:rgba(124,58,237,0.4);
  box-shadow:var(--shadow-card);
}
.expert-avatar{
  width:88px;height:88px;border-radius:50%;
  margin:0 auto 16px;overflow:hidden;
  background:var(--gradient-main);
  padding:3px;
}
.expert-avatar img{
  width:100%;height:100%;object-fit:cover;
  border-radius:50%;
}
.expert-avatar-emoji{
  width:100%;height:100%;border-radius:50%;
  background:linear-gradient(135deg,#4C1D95,#831843);
  display:flex;align-items:center;justify-content:center;
  font-size:1.8rem;
}
.expert-name{font-size:1.05rem;font-weight:700;margin-bottom:4px;}
.expert-role{font-size:0.82rem;color:var(--accent-light);margin-bottom:12px;}
.expert-desc{font-size:0.84rem;color:var(--text-muted);margin-bottom:16px;line-height:1.6;}
.expert-tags{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin-bottom:16px;}
.expert-tag{
  background:rgba(124,58,237,0.15);
  border:1px solid rgba(124,58,237,0.25);
  color:var(--text-muted);font-size:0.72rem;
  padding:2px 10px;border-radius:12px;
}
.expert-btns{display:flex;gap:8px;justify-content:center;}
.btn-sm{
  font-size:0.8rem;padding:6px 16px;border-radius:20px;
  font-weight:600;transition:var(--transition);
}
.btn-sm-primary{background:var(--gradient-main);color:#fff;}
.btn-sm-primary:hover{opacity:0.88;}
.btn-sm-outline{border:1px solid var(--border);color:var(--text-muted);}
.btn-sm-outline:hover{border-color:var(--accent);color:var(--accent);}

/* ============ 功能模块卡片 ============ */
.features-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(200px,1fr));
  gap:20px;
}
.feature-card{
  background:var(--bg-card2);border-radius:var(--radius);
  padding:28px 20px;text-align:center;
  border:1px solid var(--border);
  transition:var(--transition);
}
.feature-card:hover{border-color:rgba(124,58,237,0.4);transform:translateY(-3px);}
.feature-icon{
  width:56px;height:56px;border-radius:14px;
  background:rgba(124,58,237,0.15);
  display:flex;align-items:center;justify-content:center;
  margin:0 auto 16px;font-size:1.6rem;
}
.feature-title{font-size:0.95rem;font-weight:700;margin-bottom:8px;}
.feature-desc{font-size:0.82rem;color:var(--text-muted);line-height:1.6;}

/* ============ FAQ ============ */
.faq-list{max-width:800px;margin:0 auto;}
.faq-item{
  border:1px solid var(--border);border-radius:var(--radius-sm);
  margin-bottom:12px;overflow:hidden;
}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 22px;cursor:pointer;
  font-weight:600;font-size:0.95rem;
  transition:var(--transition);
}
.faq-q:hover{background:rgba(124,58,237,0.08);}
.faq-q.open{background:rgba(124,58,237,0.12);color:var(--accent-light);}
.faq-icon{
  width:22px;height:22px;border-radius:50%;
  background:rgba(124,58,237,0.2);
  display:flex;align-items:center;justify-content:center;
  flex-shrink:0;transition:var(--transition);font-size:1rem;
}
.faq-q.open .faq-icon{background:var(--gradient-main);transform:rotate(45deg);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height 0.35s ease,padding 0.35s ease;
  padding:0 22px;font-size:0.9rem;color:var(--text-muted);line-height:1.7;
}
.faq-a.open{max-height:400px;padding:0 22px 18px;}

/* ============ 评论 ============ */
.reviews-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(280px,1fr));
  gap:20px;
}
.review-card{
  background:var(--bg-card);border-radius:var(--radius);
  padding:24px;border:1px solid var(--border);
  transition:var(--transition);
}
.review-card:hover{border-color:rgba(124,58,237,0.35);}
.review-header{display:flex;align-items:center;gap:14px;margin-bottom:14px;}
.review-avatar{
  width:46px;height:46px;border-radius:50%;
  background:var(--gradient-main);
  display:flex;align-items:center;justify-content:center;
  font-size:1.1rem;font-weight:700;color:#fff;flex-shrink:0;
}
.review-name{font-weight:700;font-size:0.95rem;}
.review-date{font-size:0.78rem;color:var(--text-muted);}
.review-stars{color:#FBBF24;font-size:0.9rem;margin-bottom:10px;}
.review-text{font-size:0.88rem;color:var(--text-muted);line-height:1.7;}

/* ============ 合作品牌 ============ */
.partners-row{
  display:flex;flex-wrap:wrap;gap:16px;justify-content:center;align-items:center;
}
.partner-badge{
  background:var(--bg-card2);border:1px solid var(--border);
  border-radius:var(--radius-sm);padding:12px 24px;
  font-size:0.88rem;font-weight:600;color:var(--text-muted);
  transition:var(--transition);
}
.partner-badge:hover{border-color:var(--primary);color:var(--text-main);}

/* ============ 联系我们 ============ */
.contact-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:40px;
  align-items:start;
}
.contact-info h3{font-size:1.2rem;font-weight:700;margin-bottom:20px;}
.contact-item{
  display:flex;align-items:flex-start;gap:14px;
  margin-bottom:18px;
}
.contact-icon{
  width:40px;height:40px;border-radius:10px;
  background:rgba(124,58,237,0.15);
  display:flex;align-items:center;justify-content:center;
  font-size:1.1rem;flex-shrink:0;
}
.contact-label{font-size:0.78rem;color:var(--text-muted);margin-bottom:2px;}
.contact-val{font-size:0.92rem;font-weight:600;}

/* 二维码 */
.qr-row{display:flex;gap:16px;flex-wrap:wrap;}
.qr-box{
  text-align:center;
  background:var(--bg-card2);border-radius:var(--radius-sm);
  padding:14px;border:1px solid var(--border);
}
.qr-box img{border-radius:8px;margin:0 auto 8px;}
.qr-box p{font-size:0.75rem;color:var(--text-muted);}

/* 分享栏 */
.share-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.share-label{font-size:0.84rem;color:var(--text-muted);}
.share-btn{
  padding:6px 16px;border-radius:20px;font-size:0.8rem;font-weight:600;
  border:1px solid var(--border);color:var(--text-muted);
  transition:var(--transition);
}
.share-btn:hover{border-color:var(--primary);color:var(--text-main);}

/* ============ 页脚 ============ */
#site-footer{
  background:var(--bg-card);
  border-top:1px solid var(--border);
}

/* 底部Logo展示栏 */
.footer-logo-bar{
  background:var(--bg-card2);
  border-bottom:1px solid var(--border);
  padding:28px 0;
  text-align:center;
}
.footer-logo-bar .container{
  display:flex;flex-direction:column;align-items:center;gap:10px;
}
.footer-logo-link{display:inline-block;}
.footer-logo-img{height:56px;width:auto;margin:0 auto;}
.footer-slogan{
  font-size:0.84rem;color:var(--text-muted);
  letter-spacing:0.05em;
}

/* 页脚主体 */
.footer-main-wrap{padding:60px 0 0;}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1.5fr;
  gap:40px;margin-bottom:40px;
  padding-top:40px;
}
.footer-brand-title{
  font-size:1.3rem;font-weight:800;margin-bottom:14px;
  background:var(--gradient-main);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.footer-brand p{font-size:0.84rem;color:var(--text-muted);line-height:1.7;margin-bottom:20px;}
.footer-brand p a{color:var(--accent-light);}
.footer-social{display:flex;gap:10px;flex-wrap:wrap;}
.social-icon{
  width:36px;height:36px;border-radius:8px;
  background:var(--bg-card2);border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;
  font-size:0.9rem;transition:var(--transition);color:var(--text-muted);
}
.social-icon:hover{border-color:var(--primary);background:rgba(124,58,237,0.2);color:var(--text-main);}
.footer-col h3{font-size:0.95rem;font-weight:700;margin-bottom:16px;color:var(--text-main);}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{font-size:0.86rem;color:var(--text-muted);transition:var(--transition);}
.footer-col ul a:hover{color:var(--accent-light);}

/* 联系列表 */
.footer-contact-list{list-style:none;}
.footer-contact-list li{
  display:flex;align-items:center;gap:8px;
  font-size:0.84rem;color:var(--text-muted);
  margin-bottom:10px;
}
.footer-contact-list a{color:var(--text-muted);transition:var(--transition);}
.footer-contact-list a:hover{color:var(--accent-light);}
.fc-icon{flex-shrink:0;}

.footer-bottom{
  border-top:1px solid var(--border);
  padding:20px 0;
  display:flex;align-items:center;justify-content:space-between;
  flex-wrap:wrap;gap:12px;
}
.footer-bottom p{font-size:0.82rem;color:var(--text-muted);}
.footer-bottom a{color:var(--text-muted);transition:var(--transition);}
.footer-bottom a:hover{color:var(--accent-light);}

/* ============ 面包屑 ============ */
.breadcrumb-wrap{
  background:var(--bg-card2);
  border-bottom:1px solid var(--border);
  padding:10px 0;
}
.breadcrumb{
  font-size:0.84rem;color:var(--text-muted);
  display:flex;align-items:center;flex-wrap:wrap;gap:4px;
}
.breadcrumb a{color:var(--text-muted);transition:var(--transition);}
.breadcrumb a:hover{color:var(--accent-light);}
.breadcrumb .sep{margin:0 4px;opacity:0.4;}

/* ============ 页面Banner ============ */
.page-banner{
  padding:120px 0 60px;
  background:linear-gradient(135deg,rgba(124,58,237,0.15) 0%,rgba(236,72,153,0.1) 100%);
  border-bottom:1px solid var(--border);
  text-align:center;
}
.page-banner h1{
  font-size:clamp(1.8rem,4vw,3rem);font-weight:900;
  margin-bottom:14px;
}
.page-banner p{font-size:1rem;color:var(--text-muted);max-width:500px;margin:0 auto;}

/* ============ AI模块 ============ */
.ai-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
}
.ai-card{
  background:var(--bg-card2);border-radius:var(--radius);
  padding:30px 24px;border:1px solid var(--border);
  position:relative;overflow:hidden;
  transition:var(--transition);
}
.ai-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:3px;
  background:var(--gradient-main);
}
.ai-card:hover{border-color:rgba(124,58,237,0.4);transform:translateY(-3px);}
.ai-card h3{font-size:1.05rem;font-weight:700;margin-bottom:12px;}
.ai-card p{font-size:0.88rem;color:var(--text-muted);line-height:1.7;}
.ai-icon{font-size:2rem;margin-bottom:16px;}

/* ============ 社区动物主题卡片 ============ */
.community-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px;
}
.community-card{
  border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--border);transition:var(--transition);
  cursor:pointer;
}
.community-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-glow);}
.community-card-img{
  height:140px;display:flex;align-items:center;justify-content:center;
  font-size:3.5rem;
}
.community-card-body{background:var(--bg-card);padding:16px;}
.community-card-body h3,
.community-card-body h4{font-size:0.95rem;font-weight:700;margin-bottom:6px;}
.community-card-body p{font-size:0.82rem;color:var(--text-muted);}

/* ============ 统计条 ============ */
.stats-bar{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:var(--bg-card2);border-radius:var(--radius);
  border:1px solid var(--border);overflow:hidden;
}
.stat-item{
  padding:28px 20px;text-align:center;
  border-right:1px solid var(--border);
}
.stat-item:last-child{border-right:none;}
.stat-num{
  font-size:2.2rem;font-weight:900;
  background:var(--gradient-main);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;margin-bottom:6px;
}
.stat-label{font-size:0.82rem;color:var(--text-muted);}

/* ============ 标签页 ============ */
.tabs{display:flex;gap:8px;margin-bottom:28px;flex-wrap:wrap;}
.tab-btn{
  padding:8px 20px;border-radius:20px;font-size:0.88rem;font-weight:600;
  border:1px solid var(--border);color:var(--text-muted);
  transition:var(--transition);cursor:pointer;
}
.tab-btn.active,.tab-btn:hover{
  background:var(--gradient-main);color:#fff;border-color:transparent;
}

/* ============ 加载更多 ============ */
.load-more-wrap{text-align:center;margin-top:40px;}
.load-more-btn{
  background:var(--gradient-main);color:#fff;
  padding:13px 40px;border-radius:50px;font-weight:700;font-size:1rem;
  transition:var(--transition);box-shadow:0 4px 20px rgba(124,58,237,0.4);
  border:none;cursor:pointer;
}
.load-more-btn:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(124,58,237,0.55);}
.load-more-btn:disabled{opacity:0.5;cursor:not-allowed;transform:none;}

/* ============ 动画 ============ */
.fade-in{opacity:0;transform:translateY(24px);transition:opacity 0.6s ease,transform 0.6s ease;}
.fade-in.visible{opacity:1;transform:translateY(0);}

/* ============ 图片Banner区块 ============ */
.img-banner-section{
  position:relative;overflow:hidden;
  border-radius:var(--radius);margin-bottom:40px;
}
.img-banner-section img{
  width:100%;height:320px;object-fit:cover;border-radius:var(--radius);
}
.img-banner-overlay{
  position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(13,10,26,0.85) 0%,rgba(13,10,26,0.3) 100%);
  border-radius:var(--radius);
  display:flex;align-items:center;padding:40px;
}
.img-banner-text h2{font-size:1.8rem;font-weight:800;margin-bottom:12px;}
.img-banner-text p{font-size:0.95rem;color:var(--text-muted);max-width:400px;line-height:1.7;}

/* ============ 响应式 ============ */
@media(max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr;}
  .ai-grid{grid-template-columns:1fr 1fr;}
  .contact-grid{grid-template-columns:1fr;}
}
@media(max-width:768px){
  .main-nav{display:none;}
  .main-nav.open{
    display:flex;flex-direction:column;align-items:flex-start;
    position:fixed;top:70px;left:0;right:0;bottom:0;
    background:rgba(13,10,26,0.97);
    padding:24px;z-index:999;overflow-y:auto;
  }
  .nav-list{flex-direction:column;align-items:flex-start;width:100%;gap:4px;}
  .nav-list a{width:100%;padding:12px 16px;font-size:1rem;}
  .header-search{display:none;}
  .menu-toggle{display:flex;}
  .hero-stats{gap:24px;}
  .stats-bar{grid-template-columns:1fr 1fr;}
  .stat-item:nth-child(2){border-right:none;}
  .stat-item:nth-child(3){border-top:1px solid var(--border);}
  .ai-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;text-align:center;}
  .section{padding:56px 0;}
  .img-banner-section img{height:220px;}
  .img-banner-text h2{font-size:1.3rem;}
}
@media(max-width:480px){
  .hero-btns{flex-direction:column;align-items:center;}
  .video-grid{grid-template-columns:1fr;}
  .experts-grid{grid-template-columns:1fr;}
  .features-grid{grid-template-columns:1fr 1fr;}
  .qr-row{justify-content:center;}
  .footer-grid{grid-template-columns:1fr;}
}