/* ============================================================
   17c一起草 - 主样式表
   品牌色：深蓝紫 #1a0a2e | 青色 #00d4ff | 粉紫 #c850c0
   设计风格：动漫科技感 + 霓虹渐变
   ============================================================ */

/* ---- 基础重置 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: #0d0720;
  color: #e8e0f5;
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: #00d4ff; text-decoration: none; transition: color .25s; }
a:hover { color: #c850c0; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

/* ---- CSS变量 ---- */
:root {
  --c-bg:        #0d0720;
  --c-bg2:       #130a30;
  --c-bg3:       #1c1040;
  --c-primary:   #00d4ff;
  --c-secondary: #c850c0;
  --c-accent:    #7b2fff;
  --c-text:      #e8e0f5;
  --c-muted:     #9080b0;
  --c-card:      #1a1035;
  --c-border:    #2d1a5e;
  --grad-main: linear-gradient(135deg, #00d4ff 0%, #7b2fff 50%, #c850c0 100%);
  --grad-card: linear-gradient(145deg, #1c1040 0%, #130a30 100%);
  --shadow-glow: 0 0 20px rgba(0,212,255,.25), 0 4px 24px rgba(0,0,0,.5);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: .3s cubic-bezier(.4,0,.2,1);
}

/* ---- 容器 ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.section-alt { background: var(--c-bg2); }

/* ---- 标题通用 ---- */
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  text-align: center;
  margin-bottom: 12px;
  background: var(--grad-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-sub {
  text-align: center;
  color: var(--c-muted);
  margin-bottom: 48px;
  font-size: .95rem;
}

/* ============================================================
   HEADER
   ============================================================ */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13,7,32,.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--c-border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--grad-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 900;
  color: #fff;
  letter-spacing: -1px;
  box-shadow: 0 0 12px rgba(0,212,255,.4);
}
.logo-text {
  font-size: 1.25rem;
  font-weight: 800;
  background: var(--grad-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 主导航 */
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  color: var(--c-text);
  font-size: .9rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 8px;
  transition: var(--transition);
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active {
  background: rgba(0,212,255,.12);
  color: var(--c-primary);
}

/* 汉堡菜单 */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================================
   搜索栏
   ============================================================ */
#search-bar {
  background: rgba(19,10,48,.95);
  border-bottom: 1px solid var(--c-border);
  padding: 12px 0;
}
.search-bar-inner {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 640px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
}
#search-input {
  flex: 1;
  background: var(--c-bg3);
  border: 1px solid var(--c-border);
  border-radius: 24px;
  padding: 10px 20px;
  color: var(--c-text);
  font-size: .9rem;
  outline: none;
  transition: border-color .25s;
}
#search-input::placeholder { color: var(--c-muted); }
#search-input:focus { border-color: var(--c-primary); box-shadow: 0 0 0 3px rgba(0,212,255,.15); }
.search-btn {
  background: var(--grad-main);
  border: none;
  border-radius: 24px;
  padding: 10px 22px;
  color: #fff;
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity .25s;
  white-space: nowrap;
}
.search-btn:hover { opacity: .85; }
#search-tip {
  position: absolute;
  top: calc(100% + 8px);
  left: 20px;
  right: 20px;
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: .85rem;
  color: var(--c-muted);
  display: none;
  z-index: 100;
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--c-bg);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/hero-banner.jpg');
  background-size: cover;
  background-position: center top;
  filter: brightness(.45);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(13,7,32,.95) 35%, rgba(13,7,32,.2) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 600px;
  padding: 60px 0;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0,212,255,.15);
  border: 1px solid rgba(0,212,255,.35);
  border-radius: 20px;
  padding: 5px 14px;
  font-size: .78rem;
  color: var(--c-primary);
  font-weight: 600;
  margin-bottom: 20px;
  letter-spacing: .5px;
}
.hero-badge::before { content: "●"; font-size: .5rem; animation: blink 1.5s infinite; }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:.3} }
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 16px;
  color: #fff;
}
.hero h1 span {
  background: var(--grad-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 1.05rem;
  color: rgba(232,224,245,.75);
  margin-bottom: 32px;
  max-width: 480px;
}
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--grad-main);
  color: #fff;
  font-weight: 700;
  padding: 13px 28px;
  border-radius: 28px;
  font-size: .95rem;
  transition: transform .25s, box-shadow .25s;
  box-shadow: 0 4px 20px rgba(0,212,255,.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,212,255,.45); color:#fff; }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1.5px solid var(--c-primary);
  color: var(--c-primary);
  font-weight: 600;
  padding: 12px 26px;
  border-radius: 28px;
  font-size: .95rem;
  transition: var(--transition);
}
.btn-outline:hover { background: rgba(0,212,255,.1); color: var(--c-primary); }
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 40px;
  flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-num {
  font-size: 1.6rem;
  font-weight: 900;
  background: var(--grad-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { font-size: .75rem; color: var(--c-muted); margin-top: 2px; }

/* ============================================================
   动漫视频卡片
   ============================================================ */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.video-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
  border-color: rgba(0,212,255,.4);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--c-bg3);
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,.45);
  opacity: 0;
  transition: opacity .3s;
}
.video-card:hover .play-overlay { opacity: 1; }
.play-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(0,212,255,.9);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(0,212,255,.6);
  transform: scale(.85);
  transition: transform .3s;
}
.video-card:hover .play-btn { transform: scale(1); }
.play-btn::after {
  content: "";
  border-left: 20px solid #fff;
  border-top: 12px solid transparent;
  border-bottom: 12px solid transparent;
  margin-left: 4px;
}
.video-tag {
  position: absolute;
  top: 10px;
  left: 10px;
  background: var(--c-secondary);
  color: #fff;
  font-size: .7rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  letter-spacing: .5px;
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 10px;
  background: rgba(0,0,0,.7);
  color: #fff;
  font-size: .72rem;
  padding: 2px 7px;
  border-radius: 5px;
}
.video-info { padding: 14px 16px; }
.video-title {
  font-size: .95rem;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 8px;
  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: .78rem;
  color: var(--c-muted);
}
.video-meta span { display: flex; align-items: center; gap: 4px; }

/* ============================================================
   娱乐专区 Tabs
   ============================================================ */
.tab-nav {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
  flex-wrap: wrap;
  justify-content: center;
}
.tab-btn {
  padding: 8px 20px;
  border-radius: 20px;
  border: 1.5px solid var(--c-border);
  background: transparent;
  color: var(--c-muted);
  font-size: .88rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.tab-btn.active, .tab-btn:hover {
  background: var(--grad-main);
  border-color: transparent;
  color: #fff;
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ============================================================
   AI赋能模块
   ============================================================ */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.ai-card {
  background: var(--grad-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.ai-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--grad-main);
}
.ai-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-glow); }
.ai-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(0,212,255,.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 16px;
}
.ai-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; color: #fff; }
.ai-card p { font-size: .88rem; color: var(--c-muted); line-height: 1.6; }

/* ============================================================
   专家展示
   ============================================================ */
.experts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}
.expert-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  transition: var(--transition);
}
.expert-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-glow); border-color: rgba(200,80,192,.4); }
.expert-avatar {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  margin: 0 auto 14px;
  border: 3px solid transparent;
  background: var(--grad-main) border-box;
  overflow: hidden;
}
.expert-avatar img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }
.expert-name { font-size: 1.05rem; font-weight: 800; color: #fff; margin-bottom: 4px; }
.expert-role { font-size: .8rem; color: var(--c-primary); font-weight: 600; margin-bottom: 10px; }
.expert-desc { font-size: .82rem; color: var(--c-muted); margin-bottom: 16px; line-height: 1.5; }
.expert-tags { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin-bottom: 16px; }
.tag {
  background: rgba(123,47,255,.2);
  border: 1px solid rgba(123,47,255,.4);
  color: #c0a0ff;
  font-size: .72rem;
  padding: 3px 10px;
  border-radius: 12px;
}
.expert-btns { display: flex; gap: 8px; justify-content: center; }
.btn-sm {
  padding: 7px 16px;
  border-radius: 16px;
  font-size: .78rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}
.btn-sm-primary { background: var(--grad-main); color: #fff; }
.btn-sm-outline { background: transparent; border: 1.5px solid var(--c-border); color: var(--c-muted); }
.btn-sm-outline:hover { border-color: var(--c-primary); color: var(--c-primary); }

/* ============================================================
   社区功能
   ============================================================ */
.community-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}
.community-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  text-align: center;
  transition: var(--transition);
}
.community-card:hover { border-color: var(--c-secondary); transform: translateY(-3px); }
.comm-icon { font-size: 2.2rem; margin-bottom: 12px; }
.community-card h3 { font-size: .95rem; font-weight: 700; color: #fff; margin-bottom: 6px; }
.community-card p { font-size: .82rem; color: var(--c-muted); }
.comm-count { font-size: .75rem; color: var(--c-primary); margin-top: 10px; font-weight: 600; }

/* ============================================================
   合作品牌Logo墙
   ============================================================ */
.partners-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  align-items: center;
}
.partner-item {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 16px 28px;
  font-size: .9rem;
  font-weight: 700;
  color: var(--c-muted);
  transition: var(--transition);
  white-space: nowrap;
}
.partner-item:hover { border-color: var(--c-primary); color: var(--c-primary); }

/* ============================================================
   加入社区指南
   ============================================================ */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
  counter-reset: step;
}
.step-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  position: relative;
  transition: var(--transition);
}
.step-card:hover { border-color: var(--c-accent); transform: translateY(-3px); }
.step-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--grad-main);
  color: #fff;
  font-weight: 800;
  font-size: .9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
}
.step-card h3 { font-size: .95rem; font-weight: 700; color: #fff; margin-bottom: 6px; }
.step-card p { font-size: .82rem; color: var(--c-muted); }

/* ============================================================
   FAQ
   ============================================================ */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
}
.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 18px 20px;
  color: var(--c-text);
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: color .25s;
}
.faq-question:hover { color: var(--c-primary); }
.faq-question::after {
  content: "+";
  font-size: 1.3rem;
  color: var(--c-primary);
  flex-shrink: 0;
  transition: transform .3s;
}
.faq-item.open .faq-question::after { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease, padding .3s;
  padding: 0 20px;
  color: var(--c-muted);
  font-size: .88rem;
  line-height: 1.7;
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 20px 18px; }

/* ============================================================
   用户评价
   ============================================================ */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 22px 20px;
  transition: var(--transition);
}
.review-card:hover { border-color: rgba(200,80,192,.4); transform: translateY(-3px); }
.review-stars { color: #ffd700; font-size: .9rem; margin-bottom: 10px; letter-spacing: 2px; }
.review-text { font-size: .88rem; color: var(--c-muted); line-height: 1.6; margin-bottom: 14px; }
.review-author { display: flex; align-items: center; gap: 10px; }
.review-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--grad-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .85rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.review-name { font-size: .85rem; font-weight: 700; color: var(--c-text); }
.review-date { font-size: .75rem; color: var(--c-muted); }

/* ============================================================
   联系我们
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}
.contact-info-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 28px;
}
.contact-info-card h3 { font-size: 1.1rem; font-weight: 800; color: #fff; margin-bottom: 20px; }
.contact-row { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 14px; }
.contact-icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 2px; }
.contact-label { font-size: .8rem; color: var(--c-muted); }
.contact-val { font-size: .9rem; color: var(--c-text); font-weight: 500; }
.qr-grid { display: flex; gap: 20px; flex-wrap: wrap; }
.qr-item { text-align: center; }
.qr-box {
  width: 100px;
  height: 100px;
  border-radius: var(--radius);
  background: var(--c-bg3);
  border: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 8px;
  overflow: hidden;
}
.qr-box svg { width: 80px; height: 80px; }
.qr-label { font-size: .75rem; color: var(--c-muted); }

/* ============================================================
   社交分享
   ============================================================ */
.share-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 24px;
}
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: 20px;
  font-size: .82rem;
  font-weight: 600;
  cursor: pointer;
  border: 1.5px solid var(--c-border);
  background: var(--c-card);
  color: var(--c-muted);
  transition: var(--transition);
}
.share-btn:hover { border-color: var(--c-primary); color: var(--c-primary); }

/* ============================================================
   FOOTER
   ============================================================ */
#site-footer {
  background: #080415;
  border-top: 1px solid var(--c-border);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand p { font-size: .85rem; color: var(--c-muted); margin-top: 12px; line-height: 1.7; }
.footer-col h4 { font-size: .9rem; font-weight: 700; color: #fff; margin-bottom: 14px; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { font-size: .83rem; color: var(--c-muted); transition: color .25s; }
.footer-col ul li a:hover { color: var(--c-primary); }
.footer-bottom {
  border-top: 1px solid var(--c-border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: .8rem;
  color: var(--c-muted);
}
.footer-bottom a { color: var(--c-muted); }
.footer-bottom a:hover { color: var(--c-primary); }

/* ============================================================
   回到顶部
   ============================================================ */
#scroll-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--grad-main);
  border: none;
  color: #fff;
  font-size: 1.1rem;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0,212,255,.4);
  z-index: 999;
  transition: transform .25s;
}
#scroll-top:hover { transform: translateY(-3px); }
#scroll-top.show { display: flex; }

/* ============================================================
   内页通用
   ============================================================ */
.page-hero {
  background: var(--c-bg2);
  padding: 60px 0 40px;
  border-bottom: 1px solid var(--c-border);
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .82rem;
  color: var(--c-muted);
  margin-bottom: 16px;
}
.breadcrumb a { color: var(--c-muted); }
.breadcrumb a:hover { color: var(--c-primary); }
.breadcrumb span { color: var(--c-border); }
.page-hero h1 { font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 800; color: #fff; }
.page-hero p { color: var(--c-muted); margin-top: 8px; }

/* 内页视频网格 */
.anime-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

/* 侧边栏布局 */
.content-sidebar {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  align-items: start;
}
.sidebar-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 20px;
}
.sidebar-card h3 { font-size: .95rem; font-weight: 700; color: #fff; margin-bottom: 14px; padding-bottom: 10px; border-bottom: 1px solid var(--c-border); }

/* 分页 */
.pagination {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 40px;
}
.page-btn {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  border: 1px solid var(--c-border);
  background: var(--c-card);
  color: var(--c-muted);
  font-size: .88rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.page-btn.active, .page-btn:hover { background: var(--grad-main); border-color: transparent; color: #fff; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .content-sidebar { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .main-nav { display: none; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: rgba(13,7,32,.98); border-bottom: 1px solid var(--c-border); padding: 16px; gap: 4px; }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 10px 16px; border-radius: 8px; }
  #site-header { position: relative; }
  .menu-toggle { display: flex; }
  .hero { min-height: 480px; }
  .hero-content { padding: 40px 0; }
  .hero-stats { gap: 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .section { padding: 56px 0; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
}
@media (max-width: 480px) {
  .hero h1 { font-size: 1.8rem; }
  .hero-btns { flex-direction: column; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; }
  .tab-nav { gap: 6px; }
  .tab-btn { padding: 7px 14px; font-size: .82rem; }
}

/* ============================================================
   动画
   ============================================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeInUp .6s ease both; }
.fade-in-delay-1 { animation-delay: .1s; }
.fade-in-delay-2 { animation-delay: .2s; }
.fade-in-delay-3 { animation-delay: .3s; }

/* 懒加载占位 */
img[loading="lazy"] { background: var(--c-bg3); }

/* 滚动条美化 */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--c-bg); }
::-webkit-scrollbar-thumb { background: var(--c-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--c-accent); }