/* =============================================
   国产主播 影视传媒 · 视频社区 - 原创主样式
   Brand: 国产主播 | Domain: goodel.cn
   原创配色：深紫黑+霓虹青+星光紫
   ============================================= */

/* ---- CSS变量 ---- */
:root {
  --bg-deep:    #0a0b14;
  --bg-card:    #12131f;
  --bg-alt:     #0e0f1c;
  --bg-glass:   rgba(18,19,31,0.85);
  --border:     rgba(92,45,145,0.25);
  --border-glow:rgba(0,229,255,0.35);
  --accent1:    #5c2d91;
  --accent2:    #00e5ff;
  --accent3:    #a855f7;
  --accent4:    #f97316;
  --accent5:    #ec4899;
  --text-white: #f0f2ff;
  --text-muted: #8b8fa8;
  --text-dim:   #5a5e78;
  --glow-purple:0 0 20px rgba(92,45,145,0.6);
  --glow-cyan:  0 0 20px rgba(0,229,255,0.5);
  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --shadow-card:0 4px 24px rgba(0,0,0,0.5);
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --max-width:  1280px;
  --font-main:  'PingFang SC','Microsoft YaHei','Noto Sans CJK SC',sans-serif;
}

/* ---- 重置 ---- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;font-size:16px;}
body{
  background:var(--bg-deep);
  color:var(--text-white);
  font-family:var(--font-main);
  line-height:1.7;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--accent2);text-decoration:none;transition:color var(--transition);}
a:hover{color:#fff;}
img{max-width:100%;height:auto;display:block;}
ul,ol{list-style:none;}
button{cursor:pointer;border:none;background:none;font-family:inherit;}

/* ---- 顶部通知条 ---- */
.top-notice{
  background:linear-gradient(90deg,var(--accent1),#7c3aed,var(--accent1));
  background-size:200% 100%;
  animation:noticeSlide 6s linear infinite;
  color:#fff;
  font-size:13px;
  padding:8px 20px;
  text-align:center;
  letter-spacing:.3px;
}
.top-notice a{color:#fff;text-decoration:underline;text-underline-offset:3px;}
@keyframes noticeSlide{0%{background-position:0 0}100%{background-position:200% 0}}

/* ---- 导航栏 ---- */
.navbar{
  position:sticky;
  top:0;
  z-index:1000;
  display:flex;
  align-items:center;
  gap:16px;
  padding:0 32px;
  height:64px;
  background:rgba(10,11,20,0.92);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
  box-shadow:0 2px 24px rgba(0,0,0,0.4);
}
.navbar-brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
  text-decoration:none;
}
.site-favicon{
  border-radius:6px;
  object-fit:cover;
}
.site-logo{
  object-fit:contain;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:4px;
  flex:1;
  flex-wrap:nowrap;
}
.nav-links a{
  color:var(--text-muted);
  font-size:14px;
  font-weight:500;
  padding:6px 12px;
  border-radius:var(--radius-sm);
  transition:all var(--transition);
  white-space:nowrap;
}
.nav-links a:hover,
.nav-links a.active{
  color:var(--accent2);
  background:rgba(0,229,255,0.08);
}
.nav-search{
  display:flex;
  align-items:center;
  background:rgba(255,255,255,0.06);
  border:1px solid var(--border);
  border-radius:24px;
  padding:4px 4px 4px 14px;
  gap:6px;
  transition:border-color var(--transition);
}
.nav-search:focus-within{border-color:var(--accent2);}
.nav-search input{
  background:none;
  border:none;
  outline:none;
  color:var(--text-white);
  font-size:13px;
  width:160px;
}
.nav-search input::placeholder{color:var(--text-dim);}
.nav-search button{
  background:var(--accent1);
  color:#fff;
  border-radius:20px;
  padding:5px 10px;
  display:flex;
  align-items:center;
  justify-content:center;
  transition:background var(--transition);
}
.nav-search button:hover{background:var(--accent3);}
.nav-toggle{
  display:none;
  font-size:22px;
  color:var(--text-white);
  padding:4px 8px;
}

/* ---- Hero Banner ---- */
.hero{
  position:relative;
  min-height:90vh;
  display:flex;
  align-items:center;
  justify-content:center;
  overflow:hidden;
}
.hero-bg{
  position:absolute;
  inset:0;
  background-image:url('/images/banner_hero.jpg');
  background-size:cover;
  background-position:center top;
  background-repeat:no-repeat;
  transform:scale(1.05);
  animation:heroPan 20s ease-in-out infinite alternate;
}
@keyframes heroPan{0%{transform:scale(1.05) translateX(0)}100%{transform:scale(1.08) translateX(-2%)}}
.hero-overlay{
  position:absolute;
  inset:0;
  background:linear-gradient(
    160deg,
    rgba(10,11,20,0.75) 0%,
    rgba(92,45,145,0.35) 40%,
    rgba(10,11,20,0.85) 100%
  );
}
.hero-content{
  position:relative;
  z-index:2;
  max-width:860px;
  padding:60px 32px;
  text-align:center;
}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  background:rgba(0,229,255,0.12);
  border:1px solid rgba(0,229,255,0.3);
  color:var(--accent2);
  font-size:12px;
  font-weight:600;
  padding:5px 14px;
  border-radius:20px;
  margin-bottom:20px;
  letter-spacing:.5px;
}
.hero h1{
  font-size:clamp(2rem,5vw,3.8rem);
  font-weight:800;
  line-height:1.2;
  margin-bottom:20px;
  text-shadow:0 2px 20px rgba(0,0,0,0.6);
}
.brand-highlight{
  background:linear-gradient(135deg,var(--accent2),var(--accent3));
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero-desc{
  font-size:clamp(14px,2vw,17px);
  color:rgba(240,242,255,0.82);
  max-width:700px;
  margin:0 auto 32px;
  line-height:1.8;
}
.hero-stats{
  display:flex;
  justify-content:center;
  gap:32px;
  flex-wrap:wrap;
  margin-bottom:36px;
}
.hero-stat{
  text-align:center;
}
.hero-stat .num{
  font-size:clamp(1.4rem,3vw,2rem);
  font-weight:800;
  background:linear-gradient(135deg,var(--accent2),var(--accent3));
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero-stat .label{
  font-size:12px;
  color:var(--text-muted);
  margin-top:2px;
}
.hero-btns{
  display:flex;
  gap:16px;
  justify-content:center;
  flex-wrap:wrap;
}

/* ---- 按钮 ---- */
.btn-primary{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:linear-gradient(135deg,var(--accent1),var(--accent3));
  color:#fff;
  font-size:15px;
  font-weight:600;
  padding:12px 28px;
  border-radius:30px;
  transition:all var(--transition);
  box-shadow:0 4px 20px rgba(92,45,145,0.4);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 8px 30px rgba(92,45,145,0.6);
  color:#fff;
}
.btn-outline{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:transparent;
  color:var(--accent2);
  font-size:15px;
  font-weight:600;
  padding:11px 28px;
  border-radius:30px;
  border:2px solid var(--accent2);
  transition:all var(--transition);
}
.btn-outline:hover{
  background:rgba(0,229,255,0.1);
  transform:translateY(-2px);
  color:var(--accent2);
}
.btn-sm{
  display:inline-flex;
  align-items:center;
  font-size:13px;
  font-weight:600;
  padding:7px 18px;
  border-radius:20px;
  transition:all var(--transition);
}
.btn-sm.primary{
  background:linear-gradient(135deg,var(--accent1),var(--accent3));
  color:#fff;
}
.btn-sm.primary:hover{transform:translateY(-1px);color:#fff;}
.btn-sm.outline{
  background:transparent;
  color:var(--accent2);
  border:1.5px solid var(--accent2);
}
.btn-sm.outline:hover{background:rgba(0,229,255,0.08);color:var(--accent2);}

/* ---- 搜索区 ---- */
.search-section{
  padding:36px 32px;
  text-align:center;
  background:linear-gradient(180deg,rgba(92,45,145,0.08),transparent);
  border-bottom:1px solid var(--border);
}
.search-bar-main{
  display:flex;
  max-width:680px;
  margin:0 auto 16px;
  background:var(--bg-card);
  border:1.5px solid var(--border);
  border-radius:40px;
  overflow:hidden;
  transition:border-color var(--transition);
  box-shadow:0 4px 24px rgba(0,0,0,0.3);
}
.search-bar-main:focus-within{border-color:var(--accent2);box-shadow:var(--glow-cyan);}
.search-bar-main input{
  flex:1;
  background:none;
  border:none;
  outline:none;
  color:var(--text-white);
  font-size:15px;
  padding:14px 20px;
}
.search-bar-main input::placeholder{color:var(--text-dim);}
.search-bar-main button{
  background:linear-gradient(135deg,var(--accent1),var(--accent3));
  color:#fff;
  font-size:14px;
  font-weight:600;
  padding:0 28px;
  border-radius:0 40px 40px 0;
  transition:opacity var(--transition);
  white-space:nowrap;
}
.search-bar-main button:hover{opacity:.9;}
.search-tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  justify-content:center;
}
.search-tag{
  background:rgba(92,45,145,0.15);
  border:1px solid rgba(92,45,145,0.3);
  color:var(--text-muted);
  font-size:13px;
  padding:5px 14px;
  border-radius:16px;
  cursor:pointer;
  transition:all var(--transition);
}
.search-tag:hover{
  background:rgba(0,229,255,0.1);
  border-color:var(--accent2);
  color:var(--accent2);
}

/* ---- 通用Section ---- */
.section{
  max-width:var(--max-width);
  margin:0 auto;
  padding:64px 32px;
}
.section-alt{
  background:var(--bg-alt);
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
}
.section-inner{
  max-width:var(--max-width);
  margin:0 auto;
  padding:64px 32px;
}
.section-header{
  text-align:center;
  margin-bottom:48px;
}
.section-tag{
  display:inline-block;
  background:rgba(0,229,255,0.1);
  border:1px solid rgba(0,229,255,0.25);
  color:var(--accent2);
  font-size:12px;
  font-weight:700;
  padding:4px 14px;
  border-radius:12px;
  letter-spacing:.8px;
  text-transform:uppercase;
  margin-bottom:12px;
}
.section-title{
  font-size:clamp(1.6rem,3vw,2.4rem);
  font-weight:800;
  margin-bottom:12px;
  line-height:1.3;
}
.section-title .brand{
  background:linear-gradient(135deg,var(--accent2),var(--accent3));
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.section-desc{
  color:var(--text-muted);
  font-size:15px;
  max-width:640px;
  margin:0 auto;
}

/* ---- 视频卡片 ---- */
.video-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(280px,1fr));
  gap:24px;
}
.video-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  overflow:hidden;
  cursor:pointer;
  transition:all var(--transition);
  box-shadow:var(--shadow-card);
}
.video-card:hover{
  transform:translateY(-6px);
  border-color:var(--accent2);
  box-shadow:0 12px 40px rgba(0,229,255,0.15);
}
.video-thumb{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  background:#0d0e1a;
}
.video-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform var(--transition);
}
.video-card:hover .video-thumb img{transform:scale(1.06);}
.video-play-btn{
  position:absolute;
  inset:0;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(0,0,0,0);
  transition:background var(--transition);
}
.video-card:hover .video-play-btn{background:rgba(0,0,0,0.45);}
.play-icon{
  width:52px;
  height:52px;
  background:rgba(0,229,255,0.9);
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  opacity:0;
  transform:scale(0.7);
  transition:all var(--transition);
  box-shadow:0 0 24px rgba(0,229,255,0.6);
}
.play-icon svg{fill:#0a0b14;width:22px;height:22px;margin-left:3px;}
.video-card:hover .play-icon{opacity:1;transform:scale(1);}
.video-duration{
  position:absolute;
  bottom:8px;
  right:8px;
  background:rgba(0,0,0,0.8);
  color:#fff;
  font-size:11px;
  font-weight:600;
  padding:2px 7px;
  border-radius:4px;
}
.video-tag{
  position:absolute;
  top:8px;
  left:8px;
  background:linear-gradient(135deg,var(--accent1),var(--accent3));
  color:#fff;
  font-size:11px;
  font-weight:700;
  padding:3px 9px;
  border-radius:4px;
}
.live-badge{
  position:absolute;
  top:8px;
  left:8px;
  background:rgba(239,68,68,0.9);
  color:#fff;
  font-size:11px;
  font-weight:700;
  padding:3px 9px;
  border-radius:4px;
  display:flex;
  align-items:center;
  gap:5px;
}
.live-dot{
  width:7px;
  height:7px;
  background:#fff;
  border-radius:50%;
  animation:livePulse 1.2s ease-in-out infinite;
}
@keyframes livePulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(.8)}}
.video-info{padding:14px 16px 16px;}
.video-title{
  font-size:14px;
  font-weight:600;
  line-height:1.5;
  margin-bottom:10px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  color:var(--text-white);
}
.video-meta{
  display:flex;
  align-items:center;
  gap:12px;
  font-size:12px;
  color:var(--text-muted);
  margin-bottom:10px;
}
.video-meta span{display:flex;align-items:center;gap:4px;}
.video-meta svg{width:12px;height:12px;flex-shrink:0;}
.video-stats{
  display:flex;
  gap:12px;
}
.video-stat{
  display:flex;
  align-items:center;
  gap:4px;
  font-size:12px;
  color:var(--text-dim);
}
.video-stat svg{width:12px;height:12px;}
.video-stat.hot{color:var(--accent4);}

/* ---- 功能卡片 ---- */
.feature-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(220px,1fr));
  gap:20px;
}
.feature-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  padding:28px 24px;
  transition:all var(--transition);
  box-shadow:var(--shadow-card);
}
.feature-card:hover{
  border-color:var(--accent2);
  transform:translateY(-4px);
  box-shadow:0 8px 32px rgba(0,229,255,0.1);
}
.feature-icon{
  width:52px;
  height:52px;
  border-radius:var(--radius-sm);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:24px;
  margin-bottom:16px;
}
.feature-icon.purple{background:rgba(92,45,145,0.2);}
.feature-icon.cyan{background:rgba(0,229,255,0.1);}
.feature-icon.orange{background:rgba(249,115,22,0.15);}
.feature-icon.pink{background:rgba(236,72,153,0.15);}
.feature-icon.green{background:rgba(34,197,94,0.12);}
.feature-icon.blue{background:rgba(59,130,246,0.15);}
.feature-card h3{
  font-size:16px;
  font-weight:700;
  margin-bottom:8px;
  color:var(--text-white);
}
.feature-card p{
  font-size:13px;
  color:var(--text-muted);
  line-height:1.7;
}

/* ---- 专家卡片 ---- */
.expert-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(300px,1fr));
  gap:28px;
}
.expert-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  overflow:hidden;
  transition:all var(--transition);
  box-shadow:var(--shadow-card);
}
.expert-card:hover{
  border-color:var(--accent2);
  transform:translateY(-5px);
  box-shadow:0 12px 40px rgba(0,229,255,0.12);
}
.expert-img{
  width:100%;
  height:200px;
  object-fit:cover;
}
.expert-info{padding:20px 24px 24px;}
.expert-name{
  font-size:18px;
  font-weight:800;
  margin-bottom:4px;
}
.expert-role{
  color:var(--accent2);
  font-size:13px;
  font-weight:600;
  margin-bottom:12px;
}
.expert-desc{
  font-size:13px;
  color:var(--text-muted);
  line-height:1.7;
  margin-bottom:14px;
}
.expert-tags{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-bottom:16px;
}
.expert-tag{
  background:rgba(92,45,145,0.15);
  border:1px solid rgba(92,45,145,0.3);
  color:var(--accent3);
  font-size:11px;
  font-weight:600;
  padding:3px 10px;
  border-radius:10px;
}
.expert-btns{display:flex;gap:10px;}

/* ---- 评价卡片 ---- */
.review-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(280px,1fr));
  gap:20px;
}
.review-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  padding:22px;
  transition:all var(--transition);
}
.review-card:hover{
  border-color:rgba(92,45,145,0.5);
  transform:translateY(-3px);
}
.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,var(--accent1),var(--accent3));
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:16px;
  font-weight:700;
  flex-shrink:0;
}
.review-user-info .name{font-size:14px;font-weight:600;}
.review-user-info .date{font-size:12px;color:var(--text-dim);}
.review-stars{color:#f59e0b;font-size:14px;margin-bottom:10px;letter-spacing:2px;}
.review-text{font-size:13px;color:var(--text-muted);line-height:1.8;}
.review-text strong{color:var(--accent2);}

/* ---- FAQ ---- */
.faq-list{
  max-width:860px;
  margin:0 auto;
}
.faq-item{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color var(--transition);
}
.faq-item.open{border-color:var(--accent2);}
.faq-question{
  display:flex;
  align-items:center;
  gap:12px;
  padding:18px 22px;
  cursor:pointer;
  font-size:15px;
  font-weight:600;
  transition:background var(--transition);
}
.faq-question:hover{background:rgba(255,255,255,0.03);}
.q-icon{
  width:28px;
  height:28px;
  background:linear-gradient(135deg,var(--accent1),var(--accent3));
  border-radius:6px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:13px;
  font-weight:800;
  flex-shrink:0;
}
.faq-question span:nth-child(2){flex:1;}
.arrow{
  font-size:12px;
  color:var(--text-dim);
  transition:transform var(--transition);
}
.faq-item.open .arrow{transform:rotate(180deg);}
.faq-answer{
  max-height:0;
  overflow:hidden;
  transition:max-height 0.4s ease,padding var(--transition);
  font-size:14px;
  color:var(--text-muted);
  line-height:1.9;
  padding:0 22px;
}
.faq-item.open .faq-answer{
  max-height:300px;
  padding:0 22px 20px;
}
.faq-answer strong{color:var(--accent2);}

/* ---- 合作伙伴 ---- */
.partner-grid{
  display:flex;
  flex-wrap:wrap;
  gap:16px;
  justify-content:center;
}
.partner-item{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  padding:12px 28px;
  font-size:14px;
  font-weight:600;
  color:var(--text-muted);
  transition:all var(--transition);
}
.partner-item:hover{
  border-color:var(--accent2);
  color:var(--accent2);
  transform:translateY(-2px);
}

/* ---- 联系区 ---- */
.contact-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
  max-width:900px;
  margin:0 auto;
}
.contact-info h3{
  font-size:20px;
  font-weight:700;
  margin-bottom:24px;
  color:var(--accent2);
}
.contact-item{
  display:flex;
  align-items:flex-start;
  gap:14px;
  margin-bottom:18px;
}
.contact-item .icon{font-size:20px;flex-shrink:0;margin-top:2px;}
.contact-item .label{font-size:12px;color:var(--text-dim);margin-bottom:2px;}
.contact-item .value{font-size:14px;font-weight:500;color:var(--text-white);}
.qr-grid{
  display:flex;
  gap:24px;
  align-items:flex-start;
  flex-wrap:wrap;
}
.qr-item{text-align:center;}
.qr-item img{
  width:130px;
  height:130px;
  object-fit:cover;
  border-radius:var(--radius-md);
  border:2px solid var(--border);
  margin-bottom:8px;
}
.qr-item p{font-size:12px;color:var(--text-muted);line-height:1.6;}

/* ---- 统计横幅 ---- */
.stats-banner{
  display:flex;
  justify-content:center;
  gap:60px;
  flex-wrap:wrap;
  padding:20px 0;
}
.stat-item{text-align:center;}
.stat-item .num{
  font-size:2.4rem;
  font-weight:800;
  background:linear-gradient(135deg,var(--accent2),var(--accent3));
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.stat-item .label{font-size:13px;color:var(--text-muted);margin-top:4px;}

/* ---- 面包屑 ---- */
.breadcrumb{
  max-width:var(--max-width);
  margin:0 auto;
  padding:14px 32px;
  font-size:13px;
  color:var(--text-dim);
  display:flex;
  align-items:center;
  gap:8px;
}
.breadcrumb a{color:var(--text-muted);}
.breadcrumb a:hover{color:var(--accent2);}
.breadcrumb span{color:var(--text-dim);}

/* ---- 内页Banner ---- */
.page-banner{
  position:relative;
  height:340px;
  display:flex;
  align-items:center;
  justify-content:center;
  overflow:hidden;
}
.page-banner-bg{
  position:absolute;
  inset:0;
  background-size:cover;
  background-position:center;
  filter:blur(2px);
  transform:scale(1.05);
}
.page-banner-overlay{
  position:absolute;
  inset:0;
  background:linear-gradient(160deg,rgba(10,11,20,0.7),rgba(92,45,145,0.4),rgba(10,11,20,0.8));
}
.page-banner-content{
  position:relative;
  z-index:2;
  text-align:center;
  padding:0 32px;
}
.page-banner-content h1{
  font-size:clamp(1.8rem,4vw,3rem);
  font-weight:800;
  margin-bottom:12px;
}
.page-banner-content p{
  font-size:15px;
  color:rgba(240,242,255,0.8);
}

/* ---- 分享栏 ---- */
.share-bar{
  background:var(--bg-alt);
  border-top:1px solid var(--border);
  padding:16px 32px;
  display:flex;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
}
.share-label{font-size:13px;color:var(--text-dim);}
.share-btn{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:12px;
  font-weight:600;
  padding:5px 14px;
  border-radius:14px;
  border:1px solid var(--border);
  color:var(--text-muted);
  transition:all var(--transition);
}
.share-btn:hover{transform:translateY(-1px);}
.share-btn.wechat:hover{border-color:#07c160;color:#07c160;}
.share-btn.weibo:hover{border-color:#e6162d;color:#e6162d;}
.share-btn.douyin:hover{border-color:#fe2c55;color:#fe2c55;}
.share-btn.bilibili:hover{border-color:#00a1d6;color:#00a1d6;}

/* ---- 页脚 ---- */
footer{
  background:var(--bg-card);
  border-top:1px solid var(--border);
  margin-top:0;
}
.footer-inner{max-width:var(--max-width);margin:0 auto;padding:0 32px;}
.footer-top{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:40px;
  padding:48px 0 32px;
  border-bottom:1px solid var(--border);
}
.footer-brand .logo-wrap{margin-bottom:16px;}
.footer-brand p{
  font-size:13px;
  color:var(--text-muted);
  line-height:1.8;
  margin-bottom:20px;
}
.footer-social{display:flex;gap:10px;}
.social-btn{
  width:36px;
  height:36px;
  background:rgba(255,255,255,0.05);
  border:1px solid var(--border);
  border-radius:8px;
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--text-muted);
  transition:all var(--transition);
}
.social-btn:hover{
  background:rgba(0,229,255,0.1);
  border-color:var(--accent2);
  color:var(--accent2);
}
.footer-col h4{
  font-size:14px;
  font-weight:700;
  color:var(--text-white);
  margin-bottom:16px;
}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul li a{
  font-size:13px;
  color:var(--text-muted);
  transition:color var(--transition);
}
.footer-col ul li a:hover{color:var(--accent2);}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:12px;
  padding:20px 0;
  font-size:13px;
  color:var(--text-dim);
}
.footer-bottom strong{color:var(--text-muted);}
.footer-links{display:flex;gap:16px;}
.footer-links a{color:var(--text-dim);font-size:13px;}
.footer-links a:hover{color:var(--accent2);}

/* ---- 回到顶部 ---- */
.back-top{
  position:fixed;
  bottom:32px;
  right:32px;
  width:44px;
  height:44px;
  background:linear-gradient(135deg,var(--accent1),var(--accent3));
  color:#fff;
  border-radius:50%;
  font-size:18px;
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:0 4px 20px rgba(92,45,145,0.5);
  opacity:0;
  transform:translateY(20px);
  transition:all var(--transition);
  z-index:900;
}
.back-top.show{opacity:1;transform:translateY(0);}
.back-top:hover{transform:translateY(-3px);}

/* ---- 视频弹窗 ---- */
.video-modal{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,0.85);
  backdrop-filter:blur(8px);
  z-index:9000;
  display:flex;
  align-items:center;
  justify-content:center;
  opacity:0;
  pointer-events:none;
  transition:opacity var(--transition);
}
.video-modal.open{opacity:1;pointer-events:all;}
.video-modal-box{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  width:min(600px,92vw);
  overflow:hidden;
  transform:scale(0.9);
  transition:transform var(--transition);
  box-shadow:0 20px 60px rgba(0,0,0,0.7);
}
.video-modal.open .video-modal-box{transform:scale(1);}
.video-modal-header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:16px 20px;
  border-bottom:1px solid var(--border);
}
.video-modal-header h3{font-size:15px;font-weight:600;}
.video-modal-close{
  width:32px;
  height:32px;
  background:rgba(255,255,255,0.06);
  border-radius:50%;
  font-size:18px;
  color:var(--text-muted);
  display:flex;
  align-items:center;
  justify-content:center;
  transition:all var(--transition);
}
.video-modal-close:hover{background:rgba(239,68,68,0.2);color:#ef4444;}
.video-placeholder{
  aspect-ratio:16/9;
  background:linear-gradient(135deg,#0d0e1a,#12131f);
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:16px;
  color:var(--text-muted);
  font-size:14px;
}
.big-play{
  width:72px;
  height:72px;
  background:rgba(0,229,255,0.15);
  border:2px solid rgba(0,229,255,0.4);
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--accent2);
}

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

/* ---- 响应式 ---- */
@media(max-width:1024px){
  .footer-top{grid-template-columns:1fr 1fr;}
  .contact-grid{grid-template-columns:1fr;}
}
@media(max-width:768px){
  .navbar{padding:0 16px;}
  .nav-links{
    display:none;
    position:fixed;
    top:64px;
    left:0;
    right:0;
    background:rgba(10,11,20,0.98);
    backdrop-filter:blur(16px);
    flex-direction:column;
    padding:20px;
    gap:4px;
    border-bottom:1px solid var(--border);
    z-index:999;
  }
  .nav-links.open{display:flex;}
  .nav-links a{padding:12px 16px;width:100%;}
  .nav-search{display:none;}
  .nav-toggle{display:block;}
  .hero{min-height:70vh;}
  .hero-content{padding:40px 20px;}
  .hero-stats{gap:20px;}
  .search-section{padding:24px 16px;}
  .section,.section-inner{padding:48px 16px;}
  .video-grid{grid-template-columns:1fr 1fr;}
  .feature-grid{grid-template-columns:1fr 1fr;}
  .expert-grid{grid-template-columns:1fr;}
  .review-grid{grid-template-columns:1fr;}
  .footer-top{grid-template-columns:1fr;gap:24px;padding:32px 0 24px;}
  .footer-bottom{flex-direction:column;text-align:center;}
  .stats-banner{gap:30px;}
  .back-top{bottom:20px;right:20px;}
  .share-bar{padding:12px 16px;}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr;}
  .feature-grid{grid-template-columns:1fr;}
  .hero-btns{flex-direction:column;align-items:center;}
  .btn-primary,.btn-outline{width:100%;justify-content:center;}
  .page-banner{height:220px;}
}