/* ============================================
   香蕉视频 全新原创CSS主题样式
   配色方案：暗夜黑 + 玫瑰金 + 霓虹粉 + 冰蓝
   域名：456008.cn
   ============================================ */

/* --- CSS变量定义 --- */
:root {
  --bg-primary: #0C0910;
  --bg-secondary: #151020;
  --bg-card: #1A1428;
  --bg-card-hover: #221A34;
  --accent-rose: #E8A0BF;
  --accent-pink: #FF4D8D;
  --accent-neon: #FF6BB5;
  --accent-ice: #7DF9FF;
  --accent-gold: #D4A76A;
  --text-primary: #F0E6F6;
  --text-secondary: #A89DB8;
  --text-muted: #6B5F7B;
  --border-color: rgba(232,160,191,0.15);
  --gradient-main: linear-gradient(135deg, #FF4D8D 0%, #E8A0BF 50%, #7DF9FF 100%);
  --gradient-card: linear-gradient(145deg, #1A1428 0%, #221A34 100%);
  --gradient-hero: linear-gradient(160deg, #0C0910 0%, #1A0A20 40%, #0C0910 100%);
  --shadow-sm: 0 2px 8px rgba(255,77,141,0.08);
  --shadow-md: 0 4px 20px rgba(255,77,141,0.12);
  --shadow-lg: 0 8px 40px rgba(255,77,141,0.18);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 30px;
  --transition: all 0.35s cubic-bezier(0.4,0,0.2,1);
  --max-width: 1280px;
}

/* --- 全局重置 --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: var(--accent-rose); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-pink); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* --- 顶部导航栏 --- */
.site-header {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  background: rgba(12,9,16,0.92);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-color);
  padding: 0 24px;
  transition: var(--transition);
}
.site-header.scrolled { background: rgba(12,9,16,0.98); box-shadow: var(--shadow-md); }
.header-inner {
  max-width: var(--max-width); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.logo-area { display: flex; align-items: center; gap: 10px; }
.logo-area img { height: 38px; width: auto; }
.logo-area .brand-text {
  font-size: 1.3rem; font-weight: 700;
  background: var(--gradient-main);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a {
  padding: 8px 16px; border-radius: var(--radius-sm);
  color: var(--text-secondary); font-size: 0.95rem; font-weight: 500;
  transition: var(--transition); position: relative;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--accent-pink); background: rgba(255,77,141,0.08);
}
.main-nav a.active::after {
  content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%);
  width: 20px; height: 2px; background: var(--accent-pink); border-radius: 2px;
}
.mobile-toggle {
  display: none; background: none; border: none; color: var(--text-primary);
  font-size: 1.5rem; cursor: pointer;
}

/* --- Hero区域 --- */
.hero-section {
  min-height: 100vh; display: flex; align-items: center;
  background: var(--gradient-hero);
  position: relative; overflow: hidden;
  padding-top: 68px;
}
.hero-section::before {
  content: ''; position: absolute; top: -50%; right: -30%;
  width: 800px; height: 800px;
  background: radial-gradient(circle, rgba(255,77,141,0.12) 0%, transparent 70%);
  border-radius: 50%; animation: heroPulse 8s ease-in-out infinite;
}
.hero-section::after {
  content: ''; position: absolute; bottom: -40%; left: -20%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(125,249,255,0.08) 0%, transparent 70%);
  border-radius: 50%; animation: heroPulse 10s ease-in-out infinite reverse;
}
@keyframes heroPulse {
  0%, 100% { transform: scale(1); opacity: 0.6; }
  50% { transform: scale(1.15); opacity: 1; }
}
.hero-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 60px; align-items: center; position: relative; z-index: 2;
}
.hero-content h1 {
  font-size: 3rem; font-weight: 800; line-height: 1.2; margin-bottom: 20px;
}
.hero-content h1 .highlight {
  background: var(--gradient-main);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-content .subtitle {
  font-size: 1.15rem; color: var(--text-secondary); margin-bottom: 30px;
  line-height: 1.8;
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: var(--radius-xl);
  background: var(--gradient-main); color: #0C0910;
  font-weight: 700; font-size: 1rem;
  box-shadow: 0 4px 20px rgba(255,77,141,0.3);
  transition: var(--transition);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 30px rgba(255,77,141,0.4); color: #0C0910; }
.btn-outline {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: var(--radius-xl);
  border: 2px solid var(--accent-rose); color: var(--accent-rose);
  font-weight: 600; font-size: 1rem; transition: var(--transition);
}
.btn-outline:hover {
  background: rgba(232,160,191,0.1); transform: translateY(-2px);
  color: var(--accent-rose);
}
.hero-visual { position: relative; }
.hero-visual .main-img {
  border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 2px solid var(--border-color);
}
.hero-visual .main-img img { width: 100%; height: 420px; object-fit: cover; }
.hero-visual .float-badge {
  position: absolute; padding: 10px 18px;
  background: rgba(26,20,40,0.9); backdrop-filter: blur(10px);
  border-radius: var(--radius-md); border: 1px solid var(--border-color);
  font-size: 0.85rem; color: var(--text-primary);
  box-shadow: var(--shadow-md);
}
.hero-visual .float-badge.top-right { top: -15px; right: -15px; }
.hero-visual .float-badge.bottom-left { bottom: -15px; left: -15px; }
.hero-visual .float-badge .num {
  font-size: 1.3rem; font-weight: 800; color: var(--accent-pink);
  display: block;
}

/* --- 统计条 --- */
.stats-bar {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 40px 0;
}
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px;
  text-align: center;
}
.stat-item .stat-num {
  font-size: 2.2rem; font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-item .stat-label {
  font-size: 0.9rem; color: var(--text-secondary); margin-top: 6px;
}

/* --- 通用区块标题 --- */
.section-title {
  text-align: center; margin-bottom: 50px;
}
.section-title h2 {
  font-size: 2rem; font-weight: 700; margin-bottom: 12px;
}
.section-title h2 .hl {
  color: var(--accent-pink);
}
.section-title p {
  font-size: 1rem; color: var(--text-secondary); max-width: 600px; margin: 0 auto;
}

/* --- 视频卡片 --- */
.video-card {
  background: var(--gradient-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition);
  position: relative;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255,77,141,0.3);
}
.video-card .thumb {
  position: relative; overflow: hidden;
  aspect-ratio: 16/9;
}
.video-card .thumb img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.5s ease;
}
.video-card:hover .thumb img { transform: scale(1.08); }
.video-card .play-btn {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%) scale(0);
  width: 56px; height: 56px;
  background: rgba(255,77,141,0.9);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  transition: var(--transition); cursor: pointer;
  box-shadow: 0 4px 20px rgba(255,77,141,0.4);
}
.video-card:hover .play-btn { transform: translate(-50%, -50%) scale(1); }
.video-card .play-btn::after {
  content: ''; width: 0; height: 0;
  border-style: solid; border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 3px;
}
.video-card .duration {
  position: absolute; bottom: 8px; right: 8px;
  background: rgba(12,9,16,0.85); padding: 3px 8px;
  border-radius: 4px; font-size: 0.75rem; color: #fff;
}
.video-card .card-body { padding: 16px; }
.video-card .card-body h3 {
  font-size: 0.95rem; font-weight: 600; margin-bottom: 8px;
  line-height: 1.4; display: -webkit-box;
  -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.video-card .card-meta {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 0.8rem; color: var(--text-muted);
}
.video-card .tag {
  display: inline-block; padding: 2px 8px;
  background: rgba(255,77,141,0.1); color: var(--accent-pink);
  border-radius: 4px; font-size: 0.75rem;
}

/* --- 视频网格 --- */
.video-grid-3 {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}

/* --- 服务卡片（六宫格） --- */
.services-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.service-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 24px; text-align: center;
  transition: var(--transition);
  position: relative; overflow: hidden;
}
.service-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 3px; background: var(--gradient-main);
  transform: scaleX(0); transition: transform 0.4s ease;
}
.service-card:hover::before { transform: scaleX(1); }
.service-card:hover {
  transform: translateY(-5px); box-shadow: var(--shadow-md);
  border-color: rgba(255,77,141,0.25);
}
.service-card .icon {
  width: 60px; height: 60px; margin: 0 auto 16px;
  background: rgba(255,77,141,0.1);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem;
}
.service-card h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 10px; }
.service-card p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.6; }

/* --- 弹幕区域 --- */
.danmaku-section {
  padding: 60px 0; overflow: hidden;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
  position: relative;
}
.danmaku-track {
  white-space: nowrap; padding: 10px 0;
  animation: danmakuScroll 30s linear infinite;
}
.danmaku-track:nth-child(even) { animation-direction: reverse; animation-duration: 35s; }
.danmaku-track .dm-item {
  display: inline-block; padding: 8px 20px; margin: 0 12px;
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius-xl); font-size: 0.88rem;
  color: var(--text-secondary);
}
.danmaku-track .dm-item .dm-user { color: var(--accent-rose); font-weight: 600; margin-right: 6px; }
@keyframes danmakuScroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* --- 专家团队 --- */
.expert-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.expert-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px 20px; text-align: center;
  transition: var(--transition);
}
.expert-card:hover {
  transform: translateY(-5px); box-shadow: var(--shadow-md);
}
.expert-card .avatar {
  width: 90px; height: 90px; border-radius: 50%;
  margin: 0 auto 16px; overflow: hidden;
  border: 3px solid var(--accent-rose);
}
.expert-card .avatar img { width: 100%; height: 100%; object-fit: cover; }
.expert-card h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 4px; }
.expert-card .role { font-size: 0.85rem; color: var(--accent-pink); margin-bottom: 10px; }
.expert-card .quals { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.6; }

/* --- 用户评价 --- */
.review-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.review-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px; transition: var(--transition);
}
.review-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); }
.review-card .stars { color: var(--accent-gold); font-size: 0.9rem; margin-bottom: 12px; }
.review-card .review-text {
  font-size: 0.92rem; color: var(--text-secondary);
  line-height: 1.7; margin-bottom: 16px; font-style: italic;
}
.review-card .reviewer {
  display: flex; align-items: center; gap: 10px;
}
.review-card .reviewer img {
  width: 40px; height: 40px; border-radius: 50%; object-fit: cover;
}
.review-card .reviewer .name { font-size: 0.88rem; font-weight: 600; }
.review-card .reviewer .title { font-size: 0.78rem; color: var(--text-muted); }

/* --- FAQ手风琴 --- */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 12px; overflow: hidden;
}
.faq-q {
  padding: 18px 24px; cursor: pointer;
  display: flex; align-items: center; justify-content: space-between;
  font-weight: 600; font-size: 0.95rem;
  transition: var(--transition);
}
.faq-q:hover { color: var(--accent-pink); }
.faq-q .arrow {
  transition: transform 0.3s ease; font-size: 1.2rem;
  color: var(--accent-rose);
}
.faq-item.open .faq-q .arrow { transform: rotate(180deg); }
.faq-a {
  max-height: 0; overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 24px;
}
.faq-item.open .faq-a {
  max-height: 300px; padding: 0 24px 18px;
}
.faq-a p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; }

/* --- 面包屑 --- */
.breadcrumb {
  padding: 100px 0 20px;
}
.breadcrumb-list {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.85rem; color: var(--text-muted);
}
.breadcrumb-list a { color: var(--text-secondary); }
.breadcrumb-list a:hover { color: var(--accent-pink); }
.breadcrumb-list .sep { color: var(--text-muted); }

/* --- 分类标签 --- */
.tag-filter {
  display: flex; flex-wrap: wrap; gap: 10px;
  justify-content: center; margin-bottom: 40px;
}
.tag-filter .tag-btn {
  padding: 8px 20px; border-radius: var(--radius-xl);
  background: var(--bg-card); border: 1px solid var(--border-color);
  color: var(--text-secondary); font-size: 0.88rem;
  cursor: pointer; transition: var(--transition);
}
.tag-filter .tag-btn:hover, .tag-filter .tag-btn.active {
  background: rgba(255,77,141,0.15); border-color: var(--accent-pink);
  color: var(--accent-pink);
}

/* --- 排行榜 --- */
.rank-list { max-width: 700px; margin: 0 auto; }
.rank-item {
  display: flex; align-items: center; gap: 16px;
  padding: 14px 20px; background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 10px; transition: var(--transition);
}
.rank-item:hover { border-color: rgba(255,77,141,0.3); }
.rank-item .rank-num {
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--gradient-main); color: #0C0910;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 0.9rem; flex-shrink: 0;
}
.rank-item .rank-info { flex: 1; }
.rank-item .rank-info h4 { font-size: 0.92rem; font-weight: 600; }
.rank-item .rank-info span { font-size: 0.8rem; color: var(--text-muted); }
.rank-item .rank-views { font-size: 0.85rem; color: var(--accent-rose); font-weight: 600; }

/* --- 创作者卡片 --- */
.creator-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.creator-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 16px; text-align: center;
  transition: var(--transition);
}
.creator-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.creator-card .avatar {
  width: 72px; height: 72px; border-radius: 50%;
  margin: 0 auto 12px; overflow: hidden;
  border: 2px solid var(--accent-rose);
}
.creator-card .avatar img { width: 100%; height: 100%; object-fit: cover; }
.creator-card h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 4px; }
.creator-card .fans { font-size: 0.8rem; color: var(--text-muted); }

/* --- 流程步骤 --- */
.steps-grid {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px;
}
.step-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 16px; text-align: center;
  position: relative; transition: var(--transition);
}
.step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-sm); }
.step-card .step-num {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--gradient-main); color: #0C0910;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 1.1rem; margin: 0 auto 14px;
}
.step-card h3 { font-size: 0.95rem; font-weight: 600; margin-bottom: 8px; }
.step-card p { font-size: 0.82rem; color: var(--text-secondary); }

/* --- 等级体系 --- */
.level-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.level-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 20px; text-align: center;
  transition: var(--transition);
}
.level-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.level-card .level-icon { font-size: 2.5rem; margin-bottom: 12px; }
.level-card h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 6px; }
.level-card .level-req { font-size: 0.82rem; color: var(--accent-rose); margin-bottom: 10px; }
.level-card ul { text-align: left; }
.level-card ul li {
  font-size: 0.82rem; color: var(--text-secondary);
  padding: 3px 0; padding-left: 16px; position: relative;
}
.level-card ul li::before {
  content: '✓'; position: absolute; left: 0; color: var(--accent-pink);
}

/* --- 直播卡片 --- */
.live-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.live-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden; transition: var(--transition);
}
.live-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.live-card .live-thumb {
  position: relative; aspect-ratio: 16/10; overflow: hidden;
}
.live-card .live-thumb img { width: 100%; height: 100%; object-fit: cover; }
.live-card .live-badge {
  position: absolute; top: 10px; left: 10px;
  padding: 3px 10px; background: #FF4D4D;
  border-radius: 4px; font-size: 0.75rem; color: #fff; font-weight: 600;
  animation: livePulse 1.5s ease-in-out infinite;
}
@keyframes livePulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}
.live-card .live-info { padding: 14px; }
.live-card .live-info h4 { font-size: 0.92rem; font-weight: 600; margin-bottom: 4px; }
.live-card .live-info span { font-size: 0.8rem; color: var(--text-muted); }

/* --- 话题卡片 --- */
.topic-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.topic-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px; transition: var(--transition);
}
.topic-card:hover { border-color: rgba(255,77,141,0.3); }
.topic-card .topic-tag {
  display: inline-block; padding: 3px 10px;
  background: rgba(255,77,141,0.1); color: var(--accent-pink);
  border-radius: 4px; font-size: 0.78rem; margin-bottom: 10px;
}
.topic-card h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 6px; }
.topic-card p { font-size: 0.82rem; color: var(--text-secondary); }
.topic-card .topic-stats { font-size: 0.78rem; color: var(--text-muted); margin-top: 8px; }

/* --- 工具卡片 --- */
.tool-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.tool-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 20px; transition: var(--transition);
}
.tool-card:hover {
  transform: translateY(-5px); box-shadow: var(--shadow-md);
  border-color: rgba(255,77,141,0.25);
}
.tool-card .tool-icon {
  width: 52px; height: 52px;
  background: rgba(255,77,141,0.1);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; margin-bottom: 16px;
}
.tool-card h3 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; }
.tool-card p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.6; }
.tool-card .tool-tag {
  display: inline-block; margin-top: 12px; padding: 3px 10px;
  background: rgba(125,249,255,0.1); color: var(--accent-ice);
  border-radius: 4px; font-size: 0.75rem;
}

/* --- 对比表格 --- */
.compare-table {
  width: 100%; border-collapse: collapse;
  background: var(--bg-card); border-radius: var(--radius-md);
  overflow: hidden; border: 1px solid var(--border-color);
}
.compare-table th {
  background: rgba(255,77,141,0.1); padding: 14px 20px;
  font-weight: 600; font-size: 0.9rem; text-align: left;
  border-bottom: 1px solid var(--border-color);
}
.compare-table td {
  padding: 12px 20px; font-size: 0.88rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}
.compare-table tr:hover td { background: rgba(255,77,141,0.03); }

/* --- 页脚 --- */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo-area { margin-bottom: 16px; }
.footer-brand p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.7; }
.footer-col h4 {
  font-size: 1rem; font-weight: 600; margin-bottom: 16px;
  color: var(--text-primary);
}
.footer-col a {
  display: block; padding: 4px 0; font-size: 0.88rem;
  color: var(--text-secondary);
}
.footer-col a:hover { color: var(--accent-pink); }
.footer-qr { text-align: center; }
.footer-qr img { width: 100px; margin: 0 auto 8px; border-radius: var(--radius-sm); }
.footer-qr p { font-size: 0.78rem; color: var(--text-muted); }
.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px; text-align: center;
  font-size: 0.82rem; color: var(--text-muted);
}
.footer-bottom a { color: var(--text-secondary); }

/* --- 通用间距 --- */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-secondary); }

/* --- 响应式 --- */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { order: -1; }
  .services-grid, .expert-grid, .review-grid, .live-grid, .topic-grid, .tool-grid { grid-template-columns: repeat(2, 1fr); }
  .video-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(3, 1fr); }
  .level-grid { grid-template-columns: repeat(2, 1fr); }
  .creator-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .header-inner { height: 56px; }
  .main-nav { display: none; }
  .mobile-toggle { display: block; }
  .main-nav.open {
    display: flex; flex-direction: column;
    position: absolute; top: 56px; left: 0; right: 0;
    background: rgba(12,9,16,0.98); padding: 16px;
    border-bottom: 1px solid var(--border-color);
  }
  .hero-content h1 { font-size: 2rem; }
  .hero-visual .main-img img { height: 280px; }
  .services-grid, .expert-grid, .review-grid, .live-grid, .topic-grid, .tool-grid { grid-template-columns: 1fr; }
  .video-grid-3 { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .level-grid { grid-template-columns: 1fr; }
  .creator-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .section { padding: 50px 0; }
  .section-title h2 { font-size: 1.5rem; }
  .hero-btns { flex-direction: column; }
  .btn-primary, .btn-outline { justify-content: center; }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero-content h1 { font-size: 1.6rem; }
  .stat-item .stat-num { font-size: 1.6rem; }
  .creator-grid { grid-template-columns: 1fr; }
}