/* =============================================
   同人动漫 - 主样式文件
   Brand: 同人动漫 | Domain: bdLnesg.cn
   原创配色：深炭黑 + 烈焰橙 + 钢铁银
   ============================================= */

/* ---- CSS变量 ---- */
:root {
  --primary: #e85d04;
  --primary-dark: #c44b00;
  --primary-light: #ff7b2e;
  --secondary: #1a1a2e;
  --accent: #f0a500;
  --steel: #8a9bb0;
  --dark: #0d0d0d;
  --dark-2: #161616;
  --dark-3: #1e1e1e;
  --dark-4: #252525;
  --text: #e8e8e8;
  --text-muted: #9a9a9a;
  --text-dim: #666;
  --border: #2e2e2e;
  --border-orange: rgba(232,93,4,0.3);
  --radius: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-orange: 0 4px 24px rgba(232,93,4,0.25);
  --transition: all 0.3s cubic-bezier(0.25,0.46,0.45,0.94);
  --font: 'PingFang SC','Microsoft YaHei','Hiragino Sans GB',sans-serif;
  --font-en: 'Arial','Helvetica Neue',sans-serif;
}

/* ---- 重置 ---- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font);color:var(--text);background:var(--dark);line-height:1.7;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--primary-light)}
ul{list-style:none}
h1,h2,h3,h4,h5,h6{line-height:1.3;font-weight:700;color:#fff}

/* ---- 容器 ---- */
.container{max-width:1240px;margin:0 auto;padding:0 24px}

/* ---- 顶部公告栏 ---- */
.top-bar{
  background:linear-gradient(90deg,var(--primary-dark),var(--primary),var(--accent));
  color:#fff;text-align:center;padding:7px 20px;font-size:0.85rem;
  letter-spacing:0.5px;position:relative;overflow:hidden;
}
.top-bar::before{
  content:'';position:absolute;top:0;left:-100%;width:60%;height:100%;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,0.15),transparent);
  animation:shimmer 3s infinite;
}
@keyframes shimmer{to{left:200%}}
.top-bar a{color:#fff;font-weight:600;text-decoration:underline;margin-left:8px}

/* ---- 头部导航 ---- */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(13,13,13,0.96);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
  transition:var(--transition);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:68px;gap:20px;
}
.logo-wrap a{display:flex;align-items:center;gap:12px;text-decoration:none}
.logo-img{width:44px;height:44px;object-fit:contain;border-radius:6px}
.logo-text{
  font-size:1.5rem;font-weight:900;letter-spacing:-1px;
  font-family:var(--font-en);
  background:linear-gradient(135deg,#fff 30%,var(--primary));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.logo-sub{font-size:0.68rem;color:var(--text-muted);letter-spacing:1px;display:block;margin-top:-4px}

.main-nav ul{display:flex;gap:4px;align-items:center}
.main-nav ul li a{
  padding:8px 14px;border-radius:6px;font-size:0.9rem;
  color:var(--text-muted);font-weight:500;transition:var(--transition);
  position:relative;
}
.main-nav ul li a:hover,.main-nav ul li a.active{
  color:#fff;background:rgba(232,93,4,0.12);
}
.main-nav ul li a.active::after{
  content:'';position:absolute;bottom:-2px;left:50%;transform:translateX(-50%);
  width:20px;height:2px;background:var(--primary);border-radius:2px;
}
.header-cta{
  background:var(--primary);color:#fff!important;padding:9px 20px!important;
  border-radius:6px!important;font-weight:700!important;
  box-shadow:0 2px 12px rgba(232,93,4,0.4);
}
.header-cta:hover{background:var(--primary-dark)!important;transform:translateY(-1px)}

.nav-toggle{
  display:none;background:none;border:1px solid var(--border);
  padding:8px;border-radius:6px;cursor:pointer;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--text);transition:var(--transition)}

/* ---- 搜索框 ---- */
.search-wrap{
  background:var(--dark-2);border-bottom:1px solid var(--border);
  padding:10px 0;
}
.search-form{
  display:flex;gap:0;max-width:640px;margin:0 auto;
  border:1px solid var(--border-orange);border-radius:8px;overflow:hidden;
  background:var(--dark-3);
}
.search-input{
  flex:1;background:none;border:none;outline:none;
  padding:10px 16px;color:var(--text);font-size:0.92rem;font-family:var(--font);
}
.search-input::placeholder{color:var(--text-dim)}
.search-btn{
  background:var(--primary);border:none;padding:10px 22px;
  color:#fff;font-size:0.9rem;cursor:pointer;transition:var(--transition);
  display:flex;align-items:center;gap:6px;font-family:var(--font);font-weight:600;
}
.search-btn:hover{background:var(--primary-dark)}
.search-tip{
  text-align:center;padding:8px 0;font-size:0.85rem;color:var(--text-muted);
  display:none;
}

/* ---- 面包屑 ---- */
.breadcrumb-nav{padding:10px 0;background:var(--dark-2);border-bottom:1px solid var(--border)}
.breadcrumb{display:flex;align-items:center;gap:6px;font-size:0.82rem;color:var(--text-dim)}
.breadcrumb li+li::before{content:'›';color:var(--text-dim)}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .current{color:var(--primary)}

/* ---- Hero Banner ---- */
.hero-section{
  position:relative;min-height:92vh;display:flex;align-items:center;
  overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  background-attachment:fixed;
}
.hero-bg::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(13,13,13,0.88) 0%,rgba(13,13,13,0.6) 50%,rgba(232,93,4,0.15) 100%);
}
.hero-content{position:relative;z-index:2;max-width:780px}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(232,93,4,0.15);border:1px solid var(--border-orange);
  padding:6px 16px;border-radius:100px;font-size:0.8rem;
  color:var(--primary-light);letter-spacing:1px;margin-bottom:20px;
}
.hero-eyebrow::before{content:'▶';font-size:0.6rem}
.hero-title{
  font-size:clamp(2.4rem,5vw,4rem);font-weight:900;line-height:1.1;
  margin-bottom:16px;
}
.hero-title .brand{
  background:linear-gradient(135deg,var(--primary),var(--accent));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.hero-sub{
  font-size:1.1rem;color:rgba(232,232,232,0.8);margin-bottom:32px;
  line-height:1.8;max-width:600px;
}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:40px}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 28px;border-radius:8px;font-weight:700;font-size:0.95rem;
  transition:var(--transition);cursor:pointer;border:none;font-family:var(--font);
}
.btn-primary{
  background:var(--primary);color:#fff;
  box-shadow:0 4px 20px rgba(232,93,4,0.45);
}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 8px 28px rgba(232,93,4,0.55);color:#fff}
.btn-outline{
  background:transparent;color:#fff;
  border:2px solid rgba(255,255,255,0.3);
}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);background:rgba(232,93,4,0.08)}
.btn-sm{padding:8px 18px;font-size:0.85rem}
.btn-ghost{background:rgba(255,255,255,0.06);color:var(--text-muted);border:1px solid var(--border)}
.btn-ghost:hover{background:rgba(232,93,4,0.1);color:var(--primary);border-color:var(--border-orange)}

.hero-stats{
  display:flex;gap:32px;flex-wrap:wrap;
  padding-top:28px;border-top:1px solid rgba(255,255,255,0.1);
}
.stat-item strong{display:block;font-size:1.6rem;font-weight:900;color:var(--primary)}
.stat-item span{font-size:0.82rem;color:var(--text-muted)}

/* ---- 快捷导航 ---- */
.quick-nav{background:var(--dark-2);border-bottom:1px solid var(--border);padding:0}
.quick-nav-list{
  display:flex;overflow-x:auto;scrollbar-width:none;
}
.quick-nav-list::-webkit-scrollbar{display:none}
.quick-nav-list li a{
  display:flex;flex-direction:column;align-items:center;gap:4px;
  padding:16px 20px;font-size:0.78rem;color:var(--text-muted);
  white-space:nowrap;border-bottom:2px solid transparent;transition:var(--transition);
}
.quick-nav-list li a:hover{color:var(--primary);border-bottom-color:var(--primary)}
.qn-icon{font-size:1.2rem}

/* ---- 通用区块 ---- */
.section{padding:72px 0}
.section-alt{background:var(--dark-2)}
.section-header{margin-bottom:48px}
.section-header.center{text-align:center}
.section-tag{
  display:inline-block;background:rgba(232,93,4,0.12);
  border:1px solid var(--border-orange);color:var(--primary);
  padding:4px 14px;border-radius:100px;font-size:0.78rem;
  letter-spacing:1px;margin-bottom:12px;font-weight:600;
}
.section-title{font-size:clamp(1.6rem,3vw,2.2rem);margin-bottom:10px}
.section-title .hl{color:var(--primary)}
.section-sub{font-size:1rem;color:var(--text-muted);margin-bottom:8px}
.section-desc{font-size:0.92rem;color:var(--text-dim);max-width:600px}
.more-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--primary);font-size:0.88rem;font-weight:600;margin-top:12px;
}
.more-link:hover{gap:10px}

/* ---- 标签云 ---- */
.tag-cloud-section{padding:20px 0;background:var(--dark-3);border-bottom:1px solid var(--border)}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.tag-label{font-size:0.8rem;color:var(--text-dim);margin-right:4px}
.tag-item{
  padding:4px 12px;border-radius:100px;font-size:0.78rem;
  background:var(--dark-4);border:1px solid var(--border);color:var(--text-muted);
  transition:var(--transition);
}
.tag-item:hover{background:rgba(232,93,4,0.1);border-color:var(--border-orange);color:var(--primary)}

/* ---- 视频卡片网格 ---- */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.video-card{
  background:var(--dark-3);border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--border);transition:var(--transition);
  cursor:pointer;
}
.video-card:hover{transform:translateY(-4px);border-color:var(--border-orange);box-shadow:var(--shadow-orange)}
.video-thumb{position:relative;overflow:hidden;aspect-ratio:16/9}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 0.4s ease}
.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(0,0,0,0.3);opacity:0;transition:var(--transition);
}
.video-card:hover .play-overlay{opacity:1}
.play-circle{
  width:56px;height:56px;border-radius:50%;
  background:rgba(232,93,4,0.9);display:flex;align-items:center;justify-content:center;
  backdrop-filter:blur(4px);border:2px solid rgba(255,255,255,0.3);
  transition:var(--transition);
}
.play-circle svg{margin-left:3px}
.video-card:hover .play-circle{transform:scale(1.1)}
.v-badge{
  position:absolute;top:10px;left:10px;
  background:var(--primary);color:#fff;padding:3px 10px;
  border-radius:100px;font-size:0.72rem;font-weight:700;
}
.v-duration{
  position:absolute;bottom:10px;right:10px;
  background:rgba(0,0,0,0.75);color:#fff;padding:2px 8px;
  border-radius:4px;font-size:0.75rem;
}
.video-info{padding:16px}
.video-info h3{font-size:0.95rem;margin-bottom:8px;line-height:1.4}
.video-info h3 a{color:#fff}
.video-info h3 a:hover{color:var(--primary)}
.video-date{font-size:0.78rem;color:var(--text-dim);margin-bottom:8px}
.video-meta{display:flex;gap:14px;font-size:0.78rem;color:var(--text-muted);margin-bottom:10px}
.video-desc{font-size:0.82rem;color:var(--text-dim);line-height:1.6;margin-bottom:12px}
.video-tags{display:flex;flex-wrap:wrap;gap:6px}
.video-tags span{
  background:var(--dark-4);border:1px solid var(--border);
  padding:2px 8px;border-radius:4px;font-size:0.72rem;color:var(--text-muted);
}

/* ---- 短视频竖版卡片 ---- */
.short-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px}
.short-card{
  background:var(--dark-3);border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--border);cursor:pointer;transition:var(--transition);
}
.short-card:hover{transform:translateY(-3px);border-color:var(--border-orange)}
.short-thumb{position:relative;aspect-ratio:9/16;overflow:hidden}
.short-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 0.4s}
.short-card:hover .short-thumb img{transform:scale(1.06)}
.short-play{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  background:rgba(0,0,0,0.25);opacity:0;transition:var(--transition);
}
.short-card:hover .short-play{opacity:1}
.short-play-btn{
  width:44px;height:44px;border-radius:50%;background:rgba(232,93,4,0.85);
  display:flex;align-items:center;justify-content:center;
}
.short-dur{
  position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,0.7);
  color:#fff;font-size:0.7rem;padding:2px 6px;border-radius:3px;
}
.short-info{padding:10px 12px}
.short-info p{font-size:0.8rem;color:var(--text);line-height:1.4;margin-bottom:4px}
.short-views{font-size:0.72rem;color:var(--text-dim)}

/* ---- 标签页 ---- */
.tab-nav{
  display:flex;gap:4px;border-bottom:1px solid var(--border);
  margin-bottom:28px;overflow-x:auto;scrollbar-width:none;
}
.tab-nav::-webkit-scrollbar{display:none}
.tab-btn{
  padding:10px 20px;background:none;border:none;color:var(--text-muted);
  font-size:0.9rem;cursor:pointer;border-bottom:2px solid transparent;
  transition:var(--transition);font-family:var(--font);white-space:nowrap;
}
.tab-btn.active,.tab-btn:hover{color:var(--primary);border-bottom-color:var(--primary)}
.tab-pane{display:none}
.tab-pane.active{display:block}

/* ---- AI功能区 ---- */
.ai-section{background:linear-gradient(135deg,var(--dark-2) 0%,rgba(232,93,4,0.05) 100%)}
.ai-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.ai-text .section-title{margin-bottom:16px}
.ai-features{margin:20px 0 28px;display:flex;flex-direction:column;gap:14px}
.ai-feat{display:flex;align-items:flex-start;gap:14px}
.ai-feat-icon{
  width:40px;height:40px;border-radius:8px;background:rgba(232,93,4,0.12);
  border:1px solid var(--border-orange);display:flex;align-items:center;justify-content:center;
  font-size:1.1rem;flex-shrink:0;
}
.ai-feat-text strong{display:block;color:#fff;font-size:0.92rem;margin-bottom:2px}
.ai-feat-text span{font-size:0.82rem;color:var(--text-dim)}
.ai-img-wrap{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border)}
.ai-img-wrap img{width:100%;height:auto}

/* ---- 专家团队 ---- */
.experts-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.expert-card{
  background:var(--dark-3);border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--border);transition:var(--transition);
}
.expert-card:hover{border-color:var(--border-orange);transform:translateY(-3px)}
.expert-img{aspect-ratio:1;overflow:hidden}
.expert-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.4s}
.expert-card:hover .expert-img img{transform:scale(1.04)}
.expert-body{padding:20px}
.expert-body h3{font-size:1.05rem;margin-bottom:4px}
.expert-role{font-size:0.8rem;color:var(--primary);margin-bottom:10px;font-weight:600}
.expert-desc{font-size:0.82rem;color:var(--text-dim);line-height:1.6;margin-bottom:12px}
.expert-awards{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}
.award-tag{
  background:rgba(240,165,0,0.1);border:1px solid rgba(240,165,0,0.2);
  color:var(--accent);padding:2px 8px;border-radius:4px;font-size:0.72rem;
}
.expert-social{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.social-link{font-size:0.8rem;color:var(--text-muted);transition:var(--transition)}
.social-link:hover{color:var(--primary)}
.expert-actions{display:flex;gap:8px}

/* ---- 合作品牌 ---- */
.partners-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px;
}
.partner-item{
  background:var(--dark-3);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px;display:flex;flex-direction:column;align-items:center;gap:8px;
  transition:var(--transition);
}
.partner-item:hover{border-color:var(--border-orange);background:rgba(232,93,4,0.05)}
.partner-icon{font-size:1.8rem}
.partner-name{font-size:0.82rem;color:var(--text-muted);text-align:center}

/* ---- 加入指南 ---- */
.join-steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:20px;margin-top:28px}
.join-step{
  background:var(--dark-3);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:24px;position:relative;transition:var(--transition);
}
.join-step:hover{border-color:var(--border-orange)}
.step-num{
  display:block;font-size:2rem;font-weight:900;
  color:var(--primary);opacity:0.4;margin-bottom:10px;font-family:var(--font-en);
}
.join-step h4{font-size:0.95rem;margin-bottom:6px}
.join-step p{font-size:0.82rem;color:var(--text-dim);line-height:1.6}

/* ---- 用户评价 ---- */
.reviews-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.review-card{
  background:var(--dark-3);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:22px;transition:var(--transition);
}
.review-card:hover{border-color:var(--border-orange)}
.review-stars{color:var(--accent);font-size:0.9rem;margin-bottom:10px;letter-spacing:2px}
.review-text{
  font-size:0.88rem;color:var(--text);line-height:1.7;margin-bottom:14px;
  font-style:italic;
}
.review-author{display:flex;align-items:center;gap:12px}
.author-ava{
  width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:0.85rem;color:#fff;
  flex-shrink:0;
}
.author-name{font-size:0.88rem;font-weight:600;color:#fff}
.author-role{font-size:0.75rem;color:var(--text-dim)}

/* ---- FAQ ---- */
.faq-list{display:flex;flex-direction:column;gap:10px}
.faq-item{
  background:var(--dark-3);border:1px solid var(--border);border-radius:var(--radius);
  overflow:hidden;transition:var(--transition);
}
.faq-item.open{border-color:var(--border-orange)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 22px;cursor:pointer;
}
.faq-q h3{font-size:0.95rem;font-weight:600;color:#fff}
.faq-arrow{
  font-size:0.8rem;color:var(--primary);transition:transform 0.3s;flex-shrink:0;
}
.faq-item.open .faq-arrow{transform:rotate(180deg)}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height 0.35s ease;
}
.faq-item.open .faq-a{max-height:300px}
.faq-a p{padding:0 22px 18px;font-size:0.88rem;color:var(--text-dim);line-height:1.7}

/* ---- 媒体报道 ---- */
.coverage-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
.coverage-card{
  background:var(--dark-3);border:1px solid var(--border);border-radius:var(--radius);
  padding:18px;transition:var(--transition);
}
.coverage-card:hover{border-color:var(--border-orange)}
.coverage-media{
  font-size:0.78rem;font-weight:700;color:var(--primary);
  margin-bottom:8px;letter-spacing:0.5px;
}
.coverage-title{font-size:0.85rem;color:var(--text);line-height:1.5;margin-bottom:8px}
.coverage-date{font-size:0.75rem;color:var(--text-dim)}

/* ---- 联系区 ---- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:32px}
.contact-info h3{font-size:1.1rem;margin-bottom:10px}
.contact-info p{font-size:0.88rem;color:var(--text-dim);margin-bottom:16px;line-height:1.6}
.contact-list{display:flex;flex-direction:column;gap:10px}
.contact-list li{display:flex;align-items:flex-start;gap:10px;font-size:0.88rem;color:var(--text-muted)}
.contact-list li a{color:var(--text-muted)}
.contact-list li a:hover{color:var(--primary)}
.office-photo{border-radius:var(--radius-lg);overflow:hidden;margin-bottom:28px}
.office-photo img{width:100%;height:auto}
.office-caption{font-size:0.8rem;color:var(--text-dim);text-align:center;margin-top:8px}

.contact-qr{display:flex;gap:20px;flex-wrap:wrap}
.qr-item{text-align:center}
.qr-item img{width:100px;height:100px;object-fit:contain;border-radius:8px;border:1px solid var(--border);margin-bottom:6px}
.qr-item p{font-size:0.8rem;color:var(--text-muted)}
.qr-item small{font-size:0.72rem;color:var(--text-dim)}

.community-links{display:flex;flex-direction:column;gap:10px;margin-top:12px}
.comm-link{
  display:flex;align-items:center;gap:12px;padding:12px 16px;
  background:var(--dark-3);border:1px solid var(--border);border-radius:var(--radius);
  transition:var(--transition);
}
.comm-link:hover{border-color:var(--border-orange);background:rgba(232,93,4,0.05)}
.comm-icon{font-size:1.3rem;flex-shrink:0}
.comm-link strong{display:block;font-size:0.88rem;color:#fff}
.comm-link p{font-size:0.78rem;color:var(--text-dim);margin:0}

/* ---- 分享 ---- */
.share-btns{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.share-btn{
  display:inline-flex;align-items:center;gap:8px;padding:10px 20px;
  border-radius:8px;font-size:0.88rem;font-weight:600;transition:var(--transition);
  border:1px solid var(--border);color:var(--text-muted);background:var(--dark-3);
}
.share-btn:hover{color:#fff;border-color:var(--primary);background:rgba(232,93,4,0.1)}

/* ---- 视频模态框 ---- */
.video-modal{
  position:fixed;inset:0;z-index:9999;background:rgba(0,0,0,0.9);
  display:flex;align-items:center;justify-content:center;
  opacity:0;pointer-events:none;transition:opacity 0.3s;
}
.video-modal.open{opacity:1;pointer-events:all}
.modal-inner{
  background:var(--dark-2);border-radius:var(--radius-lg);
  width:90%;max-width:760px;overflow:hidden;border:1px solid var(--border);
}
.modal-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 20px;border-bottom:1px solid var(--border);
}
.modal-title{font-size:0.95rem;font-weight:600;color:#fff}
.modal-close{
  background:none;border:none;color:var(--text-muted);font-size:1.2rem;
  cursor:pointer;padding:4px 8px;border-radius:4px;transition:var(--transition);
}
.modal-close:hover{color:#fff;background:rgba(255,255,255,0.1)}
.modal-body{
  aspect-ratio:16/9;background:var(--dark);display:flex;align-items:center;justify-content:center;
  flex-direction:column;gap:12px;
}
.modal-play-icon{
  width:72px;height:72px;border-radius:50%;background:rgba(232,93,4,0.2);
  border:2px solid var(--primary);display:flex;align-items:center;justify-content:center;
}
.modal-body p{font-size:0.88rem;color:var(--text-muted)}
.modal-body small{font-size:0.75rem;color:var(--text-dim)}

/* ---- 页脚 ---- */
.site-footer{background:var(--dark-2);border-top:1px solid var(--border)}
.footer-top{padding:56px 0 40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
.footer-brand{}
.footer-logo{width:48px;height:48px;object-fit:contain;margin-bottom:14px}
.footer-brand-name{font-size:1.2rem;font-weight:900;color:#fff;margin-bottom:8px}
.footer-brand p{font-size:0.85rem;color:var(--text-dim);line-height:1.6;margin-bottom:16px}
.footer-social{display:flex;gap:10px;flex-wrap:wrap}
.footer-social a{
  padding:6px 14px;background:var(--dark-3);border:1px solid var(--border);
  border-radius:6px;font-size:0.8rem;color:var(--text-muted);transition:var(--transition);
}
.footer-social a:hover{border-color:var(--primary);color:var(--primary)}
.footer-links h4{font-size:0.9rem;color:#fff;margin-bottom:14px;font-weight:700}
.footer-links ul{display:flex;flex-direction:column;gap:8px}
.footer-links ul li a{font-size:0.83rem;color:var(--text-dim);transition:var(--transition)}
.footer-links ul li a:hover{color:var(--primary)}
.footer-bottom{
  border-top:1px solid var(--border);padding:18px 0;
  font-size:0.8rem;color:var(--text-dim);
}
.footer-bottom .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}
.footer-bottom a{color:var(--text-dim)}
.footer-bottom a:hover{color:var(--primary)}
.update-time{color:var(--text-dim);font-size:0.78rem}

/* ---- 响应式 ---- */
@media(max-width:1024px){
  .ai-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .main-nav{display:none;position:absolute;top:68px;left:0;right:0;background:var(--dark);border-bottom:1px solid var(--border);padding:12px 0;z-index:999}
  .main-nav.open{display:block}
  .main-nav ul{flex-direction:column;gap:0}
  .main-nav ul li a{padding:12px 24px;border-radius:0}
  .nav-toggle{display:flex}
  .hero-section{min-height:70vh}
  .hero-stats{gap:20px}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .video-grid{grid-template-columns:1fr 1fr}
  .short-grid{grid-template-columns:repeat(3,1fr)}
  .hero-btns{flex-direction:column;align-items:flex-start}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .short-grid{grid-template-columns:repeat(2,1fr)}
  .experts-grid{grid-template-columns:1fr}
  .reviews-grid{grid-template-columns:1fr}
  .join-steps{grid-template-columns:1fr}
  .coverage-grid{grid-template-columns:1fr}
}

/* ---- 懒加载 ---- */
img[loading="lazy"]{opacity:0;transition:opacity 0.4s}
img.loaded{opacity:1}

/* ---- 滚动条 ---- */
::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-track{background:var(--dark)}
::-webkit-scrollbar-thumb{background:var(--dark-4);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--primary)}