/* =====================================================
   高清3D动漫 (bdlodz.cn) - 原创样式表
   配色：赛博蓝 #00d2ff | 霓虹紫 #b100ff | 深邃黑 #0b0c10
   ===================================================== */

/* ---- 全局重置与基础 ---- */
*, *::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: #0b0c10;
  color: #e0e0e0;
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: #00d2ff; text-decoration: none; transition: color .25s; }
a:hover { color: #b100ff; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

/* ---- CSS变量 ---- */
:root {
  --cyan: #00d2ff;
  --purple: #b100ff;
  --dark: #0b0c10;
  --dark2: #12141a;
  --dark3: #1a1d26;
  --text: #e0e0e0;
  --text-muted: #8a8fa8;
  --border: rgba(0,210,255,.15);
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,.5);
  --glow-cyan: 0 0 20px rgba(0,210,255,.3);
  --glow-purple: 0 0 20px rgba(177,0,255,.3);
  --transition: .3s ease;
}

/* ---- 容器 ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.container-wide { max-width: 1400px; margin: 0 auto; padding: 0 20px; }

/* ---- 通用工具类 ---- */
.text-cyan { color: var(--cyan); }
.text-purple { color: var(--purple); }
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-40 { margin-top: 40px; }
.mb-40 { margin-bottom: 40px; }

/* ---- 按钮 ---- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: 50px; font-size: .95rem;
  font-weight: 600; cursor: pointer; border: none;
  transition: transform .2s, box-shadow .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(135deg, var(--cyan), #0090c8);
  color: #fff; box-shadow: var(--glow-cyan);
}
.btn-primary:hover { box-shadow: 0 0 30px rgba(0,210,255,.5); color: #fff; }
.btn-outline {
  background: transparent; color: var(--cyan);
  border: 2px solid var(--cyan);
}
.btn-outline:hover { background: rgba(0,210,255,.1); color: var(--cyan); }
.btn-purple {
  background: linear-gradient(135deg, var(--purple), #7a00cc);
  color: #fff; box-shadow: var(--glow-purple);
}
.btn-lg { padding: 16px 40px; font-size: 1.05rem; }
.btn-sm { padding: 8px 18px; font-size: .85rem; }

/* ---- 标签徽章 ---- */
.badge {
  display: inline-block; padding: 3px 10px; border-radius: 20px;
  font-size: .75rem; font-weight: 600;
}
.badge-cyan { background: rgba(0,210,255,.15); color: var(--cyan); border: 1px solid rgba(0,210,255,.3); }
.badge-purple { background: rgba(177,0,255,.15); color: var(--purple); border: 1px solid rgba(177,0,255,.3); }
.badge-live { background: #e53935; color: #fff; animation: pulse-live 1.5s infinite; }
@keyframes pulse-live { 0%,100%{opacity:1} 50%{opacity:.6} }

/* ---- 分区标题 ---- */
.section-header { text-align: center; margin-bottom: 48px; }
.section-tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: .8rem; font-weight: 700; letter-spacing: .1em;
  text-transform: uppercase; color: var(--cyan);
  margin-bottom: 12px;
}
.section-tag::before, .section-tag::after {
  content: ''; display: inline-block; width: 24px; height: 1px;
  background: var(--cyan);
}
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800; color: #fff; line-height: 1.3;
}
.section-title .highlight {
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-subtitle { color: var(--text-muted); font-size: 1rem; margin-top: 12px; }

/* ---- 网格布局 ---- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.grid-5 { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }

/* ---- 卡片基础 ---- */
.card {
  background: var(--dark2); border-radius: var(--radius);
  border: 1px solid var(--border); overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow), var(--glow-cyan); }

/* ======================================================
   顶部导航 Header
   ====================================================== */
.site-header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(11,12,16,.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; gap: 24px;
  height: 64px;
}
.site-logo {
  display: flex; align-items: center; gap: 10px;
  flex-shrink: 0; color: #fff;
}
.site-logo .logo-icon { width: 36px; height: 36px; border-radius: 8px; }
.site-logo .logo-text { height: 28px; width: auto; }
.main-nav { display: flex; align-items: center; gap: 4px; flex: 1; }
.main-nav a {
  padding: 8px 14px; border-radius: var(--radius-sm);
  color: var(--text-muted); font-size: .9rem; font-weight: 500;
  transition: color .2s, background .2s;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--cyan); background: rgba(0,210,255,.08);
}
.header-actions { display: flex; align-items: center; gap: 12px; }
.btn-upload {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 18px; border-radius: 50px;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  color: #fff; font-size: .85rem; font-weight: 600;
  transition: opacity .2s;
}
.btn-upload:hover { opacity: .85; color: #fff; }
.menu-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.menu-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--text); border-radius: 2px;
  transition: transform .3s, opacity .3s;
}

/* ---- 搜索栏 ---- */
.search-bar-section {
  background: var(--dark2); border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.search-bar-inner {
  max-width: 800px; margin: 0 auto; padding: 0 20px;
}
.search-input-wrap {
  display: flex; align-items: center;
  background: var(--dark3); border: 1px solid var(--border);
  border-radius: 50px; overflow: hidden; padding: 0 6px 0 20px;
  transition: border-color .2s;
}
.search-input-wrap:focus-within { border-color: var(--cyan); box-shadow: var(--glow-cyan); }
.search-input-wrap input {
  flex: 1; background: none; border: none; outline: none;
  color: var(--text); font-size: .9rem; padding: 10px 0;
}
.search-input-wrap input::placeholder { color: var(--text-muted); }
.search-submit {
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  border: none; border-radius: 50px; padding: 8px 18px;
  color: #fff; cursor: pointer; font-size: .85rem; font-weight: 600;
  transition: opacity .2s;
}
.search-submit:hover { opacity: .85; }
.search-hot-tags {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  margin-top: 8px; font-size: .8rem;
}
.search-hot-tags span { color: var(--text-muted); }
.search-hot-tags a {
  color: var(--text-muted); padding: 2px 10px; border-radius: 20px;
  border: 1px solid var(--border); font-size: .78rem;
  transition: color .2s, border-color .2s;
}
.search-hot-tags a:hover { color: var(--cyan); border-color: var(--cyan); }

/* ======================================================
   Hero Banner 首屏
   ====================================================== */
.hero-section {
  position: relative; min-height: 600px;
  display: flex; align-items: center; overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  filter: brightness(.45);
}
.hero-bg::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(11,12,16,.9) 40%, transparent 100%);
}
.hero-content-wrap {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px;
  align-items: center; padding: 80px 0;
}
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(0,210,255,.1); border: 1px solid rgba(0,210,255,.3);
  border-radius: 50px; padding: 6px 16px; font-size: .8rem;
  color: var(--cyan); font-weight: 600; margin-bottom: 20px;
}
.hero-tag .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); animation: pulse-live 1.5s infinite; }
.hero-title {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 900; color: #fff; line-height: 1.2; margin-bottom: 20px;
}
.hero-title .highlight {
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc { color: var(--text-muted); font-size: 1rem; margin-bottom: 32px; max-width: 480px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 40px; }
.hero-stats { display: flex; gap: 32px; }
.hero-stat-item .num { font-size: 1.8rem; font-weight: 800; color: var(--cyan); }
.hero-stat-item .label { font-size: .8rem; color: var(--text-muted); }
.hero-video-preview {
  display: grid; grid-template-columns: 1fr 1fr; gap: 12px;
}
.hero-video-card {
  position: relative; border-radius: var(--radius-sm); overflow: hidden;
  aspect-ratio: 16/9; display: block;
}
.hero-video-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.hero-video-card:hover img { transform: scale(1.05); }
.hero-video-card .play-overlay {
  position: absolute; inset: 0; background: rgba(0,0,0,.4);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: opacity .3s;
}
.hero-video-card:hover .play-overlay { opacity: 1; }
.play-btn-circle {
  width: 48px; height: 48px; border-radius: 50%;
  background: rgba(0,210,255,.85); display: flex;
  align-items: center; justify-content: center;
  font-size: 1.2rem; color: #fff;
  transform: scale(.8); transition: transform .3s;
}
.hero-video-card:hover .play-btn-circle { transform: scale(1); }
.hero-video-card .card-label {
  position: absolute; bottom: 8px; left: 8px;
  background: rgba(0,0,0,.7); color: #fff;
  font-size: .72rem; padding: 3px 8px; border-radius: 4px;
}

/* ======================================================
   分区通用 section
   ====================================================== */
.section { padding: 80px 0; }
.section-dark { background: var(--dark2); }
.section-darker { background: var(--dark3); }
.section-gradient {
  background: linear-gradient(135deg, rgba(0,210,255,.05), rgba(177,0,255,.05));
}

/* ======================================================
   视频卡片 Video Card
   ====================================================== */
.video-card { cursor: pointer; }
.video-card-thumb {
  position: relative; aspect-ratio: 16/9; overflow: hidden;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}
.video-card-thumb img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .4s;
}
.video-card:hover .video-card-thumb img { transform: scale(1.08); }
.video-card-thumb .duration {
  position: absolute; bottom: 8px; right: 8px;
  background: rgba(0,0,0,.75); color: #fff;
  font-size: .72rem; padding: 2px 7px; border-radius: 4px;
}
.play-icon {
  position: absolute; inset: 0; display: flex;
  align-items: center; justify-content: center;
  opacity: 0; transition: opacity .3s;
}
.video-card:hover .play-icon { opacity: 1; }
.play-icon-circle {
  width: 52px; height: 52px; border-radius: 50%;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; color: #fff;
  box-shadow: 0 0 24px rgba(0,210,255,.5);
  transform: scale(.7); transition: transform .3s;
}
.video-card:hover .play-icon-circle { transform: scale(1); }
.video-card-info { padding: 14px 16px 16px; }
.video-card-title {
  font-size: .92rem; font-weight: 600; color: #fff;
  margin-bottom: 8px; line-height: 1.4;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.video-card-meta {
  display: flex; align-items: center; gap: 12px;
  font-size: .78rem; color: var(--text-muted);
}
.video-card-meta .views::before { content: '▶ '; }
.video-card-meta .likes::before { content: '♥ '; color: #e53935; }
.video-card-meta .comments::before { content: '💬 '; }
.video-card-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
.video-tag {
  font-size: .72rem; padding: 2px 8px; border-radius: 20px;
  background: rgba(0,210,255,.1); color: var(--cyan);
  border: 1px solid rgba(0,210,255,.2);
}

/* ---- 分类标签 ---- */
.category-tabs { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 32px; }
.category-tab {
  padding: 8px 20px; border-radius: 50px; font-size: .85rem;
  font-weight: 600; cursor: pointer; border: 1px solid var(--border);
  color: var(--text-muted); background: var(--dark2);
  transition: all .2s;
}
.category-tab:hover, .category-tab.active {
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  color: #fff; border-color: transparent;
  box-shadow: var(--glow-cyan);
}

/* ======================================================
   数据统计区
   ====================================================== */
.stats-section {
  background: linear-gradient(135deg, rgba(0,210,255,.08), rgba(177,0,255,.08));
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  padding: 60px 0;
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; text-align: center; }
.stat-item .stat-num {
  font-size: 2.4rem; font-weight: 900;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-item .stat-label { color: var(--text-muted); font-size: .9rem; margin-top: 4px; }
.stat-item .stat-icon { font-size: 1.8rem; margin-bottom: 8px; }

/* ======================================================
   专家展示
   ====================================================== */
.expert-card { text-align: center; }
.expert-card .expert-avatar {
  width: 96px; height: 96px; border-radius: 50%;
  object-fit: cover; margin: 0 auto 16px;
  border: 3px solid var(--cyan); box-shadow: var(--glow-cyan);
}
.expert-card .expert-name { font-size: 1.05rem; font-weight: 700; color: #fff; }
.expert-card .expert-title { font-size: .82rem; color: var(--cyan); margin: 4px 0 8px; }
.expert-card .expert-desc { font-size: .82rem; color: var(--text-muted); line-height: 1.6; }
.expert-card .expert-awards { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; margin: 10px 0; }
.expert-card .expert-actions { display: flex; gap: 8px; justify-content: center; margin-top: 14px; }

/* ======================================================
   直播卡片
   ====================================================== */
.live-card { cursor: pointer; }
.live-card-thumb { position: relative; aspect-ratio: 16/9; overflow: hidden; border-radius: var(--radius-sm) var(--radius-sm) 0 0; }
.live-card-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.live-card:hover .live-card-thumb img { transform: scale(1.06); }
.live-badge {
  position: absolute; top: 10px; left: 10px;
  background: #e53935; color: #fff; font-size: .72rem;
  font-weight: 700; padding: 3px 10px; border-radius: 20px;
  animation: pulse-live 1.5s infinite;
}
.live-viewers {
  position: absolute; top: 10px; right: 10px;
  background: rgba(0,0,0,.7); color: #fff;
  font-size: .72rem; padding: 3px 8px; border-radius: 4px;
}
.live-card-info { padding: 14px 16px 16px; }
.live-card-title { font-size: .92rem; font-weight: 600; color: #fff; margin-bottom: 6px; }
.live-card-host { font-size: .8rem; color: var(--text-muted); }

/* ======================================================
   AI赋能区
   ====================================================== */
.ai-feature-card {
  display: flex; gap: 20px; align-items: flex-start;
  background: var(--dark2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  transition: transform var(--transition), box-shadow var(--transition);
}
.ai-feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow), var(--glow-purple); }
.ai-feature-icon {
  width: 52px; height: 52px; border-radius: 12px; flex-shrink: 0;
  background: linear-gradient(135deg, rgba(0,210,255,.2), rgba(177,0,255,.2));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
}
.ai-feature-body h4 { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 6px; }
.ai-feature-body p { font-size: .85rem; color: var(--text-muted); line-height: 1.6; }

/* ======================================================
   用户评价
   ====================================================== */
.review-card { padding: 24px; }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.review-avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; color: #fff; font-weight: 700; flex-shrink: 0;
}
.review-name { font-weight: 600; color: #fff; font-size: .92rem; }
.review-meta { font-size: .76rem; color: var(--text-muted); }
.review-stars { color: #ffc107; font-size: .9rem; margin-bottom: 10px; }
.review-text { font-size: .88rem; color: var(--text-muted); line-height: 1.7; }
.review-tag { margin-top: 10px; }

/* ======================================================
   FAQ
   ====================================================== */
.faq-item {
  background: var(--dark2); border: 1px solid var(--border);
  border-radius: var(--radius); margin-bottom: 12px; overflow: hidden;
}
.faq-question {
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px 22px; cursor: pointer;
  font-size: .95rem; font-weight: 600; color: #fff;
  transition: color .2s;
}
.faq-question:hover { color: var(--cyan); }
.faq-question .faq-icon {
  width: 24px; height: 24px; border-radius: 50%;
  background: rgba(0,210,255,.1); border: 1px solid rgba(0,210,255,.3);
  display: flex; align-items: center; justify-content: center;
  font-size: .9rem; color: var(--cyan); flex-shrink: 0;
  transition: transform .3s;
}
.faq-item.open .faq-question .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0; overflow: hidden;
  transition: max-height .4s ease, padding .3s;
  padding: 0 22px;
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 22px 18px; }
.faq-answer p { font-size: .88rem; color: var(--text-muted); line-height: 1.8; }

/* ======================================================
   How-To 步骤
   ====================================================== */
.howto-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.howto-step { text-align: center; padding: 32px 20px; }
.howto-step .step-num {
  width: 56px; height: 56px; border-radius: 50%; margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; font-weight: 900; color: #fff;
  box-shadow: var(--glow-cyan);
}
.howto-step h4 { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 8px; }
.howto-step p { font-size: .85rem; color: var(--text-muted); line-height: 1.6; }

/* ======================================================
   合作Logo墙
   ====================================================== */
.partner-wall { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; align-items: center; }
.partner-item {
  background: var(--dark2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 14px 28px;
  font-size: .88rem; font-weight: 600; color: var(--text-muted);
  transition: color .2s, border-color .2s;
}
.partner-item:hover { color: var(--cyan); border-color: var(--cyan); }

/* ======================================================
   联系区
   ====================================================== */
.contact-card {
  background: var(--dark2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px; text-align: center;
}
.contact-card .contact-icon { font-size: 2rem; margin-bottom: 12px; }
.contact-card h4 { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 8px; }
.contact-card p { font-size: .85rem; color: var(--text-muted); line-height: 1.7; }
.qr-img { width: 120px; height: 120px; margin: 0 auto 10px; border-radius: 8px; }
.qr-title { font-size: .88rem; font-weight: 600; color: #fff; }
.qr-desc { font-size: .78rem; color: var(--text-muted); margin-top: 4px; }

/* ======================================================
   弹幕效果（纯CSS动画）
   ====================================================== */
.danmaku-container {
  position: relative; overflow: hidden; height: 48px;
  background: rgba(0,0,0,.3); border-radius: 8px;
  margin: 16px 0;
}
.danmaku-item {
  position: absolute; white-space: nowrap;
  font-size: .82rem; color: rgba(255,255,255,.7);
  animation: danmaku-scroll linear infinite;
  top: 50%; transform: translateY(-50%);
}
@keyframes danmaku-scroll {
  from { left: 100%; }
  to { left: -100%; }
}

/* ======================================================
   分享按钮
   ====================================================== */
.share-buttons { display: flex; gap: 10px; flex-wrap: wrap; }
.share-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: 50px; font-size: .82rem;
  font-weight: 600; cursor: pointer; border: 1px solid var(--border);
  background: var(--dark2); color: var(--text-muted);
  transition: all .2s;
}
.share-btn:hover { color: var(--cyan); border-color: var(--cyan); }

/* ======================================================
   页脚 Footer
   ====================================================== */
.site-footer {
  background: var(--dark2); border-top: 1px solid var(--border);
  padding: 60px 0 0;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo-wrap { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-brand .logo-wrap img { width: 36px; height: 36px; border-radius: 8px; }
.footer-brand .logo-wrap span { font-size: 1.1rem; font-weight: 800; color: #fff; }
.footer-brand p { font-size: .85rem; color: var(--text-muted); line-height: 1.8; margin-bottom: 16px; }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--dark3); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; color: var(--text-muted);
  transition: color .2s, border-color .2s, background .2s;
}
.footer-social a:hover { color: var(--cyan); border-color: var(--cyan); background: rgba(0,210,255,.1); }
.footer-col h4 { font-size: .9rem; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: .85rem; color: var(--text-muted); transition: color .2s; }
.footer-col ul li a:hover { color: var(--cyan); }
.footer-qr-row {
  display: flex; gap: 32px; justify-content: center; padding: 32px 0;
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px; padding: 20px 0;
  font-size: .8rem; color: var(--text-muted);
}
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--cyan); }
.footer-links { display: flex; gap: 16px; }

/* ======================================================
   面包屑
   ====================================================== */
.breadcrumb {
  display: flex; align-items: center; gap: 6px;
  font-size: .82rem; color: var(--text-muted); padding: 12px 0;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb .sep { color: var(--border); }
.breadcrumb .current { color: var(--cyan); }

/* ======================================================
   内页 Hero
   ====================================================== */
.inner-hero {
  background: linear-gradient(135deg, var(--dark2), var(--dark3));
  border-bottom: 1px solid var(--border); padding: 48px 0;
}
.inner-hero h1 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; color: #fff; margin-bottom: 8px; }
.inner-hero p { color: var(--text-muted); font-size: .95rem; }

/* ======================================================
   响应式
   ====================================================== */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-5 { grid-template-columns: repeat(3, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .howto-steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .hero-content-wrap { grid-template-columns: 1fr; }
  .hero-video-preview { display: none; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
  .main-nav { display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; background: rgba(11,12,16,.98); padding: 16px; border-bottom: 1px solid var(--border); z-index: 999; }
  .main-nav.open { display: flex; }
  .menu-toggle { display: flex; }
  .header-actions .btn-upload span:last-child { display: none; }
  .footer-grid { grid-template-columns: 1fr; }
  .howto-steps { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-qr-row { flex-direction: column; align-items: center; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 480px) {
  .hero-title { font-size: 1.8rem; }
  .howto-steps { grid-template-columns: 1fr; }
  .hero-stats { gap: 16px; }
  .hero-stat-item .num { font-size: 1.4rem; }
}

/* ======================================================
   动画
   ====================================================== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-fadeInUp { animation: fadeInUp .6s ease both; }
.delay-1 { animation-delay: .1s; }
.delay-2 { animation-delay: .2s; }
.delay-3 { animation-delay: .3s; }
.delay-4 { animation-delay: .4s; }

/* ======================================================
   滚动条美化
   ====================================================== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--dark); }
::-webkit-scrollbar-thumb { background: rgba(0,210,255,.3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--cyan); }