/* ============================================
   糖心vlog 全新原创样式表
   配色：霓虹紫 + 玫红 + 暗夜蓝 + 冰白
   布局：侧边栏导航 + 右侧内容区
   特效：玻璃拟态 + 霓虹发光 + 粒子背景
   ============================================ */

/* === 基础重置与变量 === */
:root {
  --neon-purple: #8B5CF6;
  --neon-pink: #EC4899;
  --dark-bg: #0F172A;
  --darker-bg: #080D1A;
  --card-bg: rgba(15, 23, 42, 0.7);
  --glass-bg: rgba(139, 92, 246, 0.08);
  --glass-border: rgba(139, 92, 246, 0.2);
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --accent-gold: #FBBF24;
  --gradient-main: linear-gradient(135deg, #8B5CF6, #EC4899);
  --gradient-dark: linear-gradient(180deg, #0F172A, #080D1A);
  --sidebar-w: 260px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-neon: 0 0 20px rgba(139, 92, 246, 0.3);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--darker-bg);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
}

a { color: var(--neon-purple); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--neon-pink); }

img { max-width: 100%; height: auto; display: block; }

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
}

/* === 侧边栏导航（原创布局） === */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.95), rgba(8, 13, 26, 0.98));
  backdrop-filter: blur(20px);
  border-right: 1px solid var(--glass-border);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  padding: 24px 0;
  overflow-y: auto;
  transition: var(--transition);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 24px 24px;
  border-bottom: 1px solid var(--glass-border);
}

.sidebar-logo img { width: 42px; height: 42px; border-radius: 10px; }

.sidebar-logo .brand-text {
  font-size: 1.25rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar-nav { flex: 1; padding: 20px 0; }

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 24px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  border-left: 3px solid transparent;
  transition: var(--transition);
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
  color: var(--text-primary);
  background: var(--glass-bg);
  border-left-color: var(--neon-purple);
}

.sidebar-nav a .nav-icon {
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.sidebar-download {
  margin: 0 20px;
  padding: 14px;
  text-align: center;
  background: var(--gradient-main);
  border-radius: var(--radius-md);
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
  display: block;
}

.sidebar-download:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-neon);
  color: #fff;
}

/* === 主内容区 === */
.main-wrap {
  margin-left: var(--sidebar-w);
  min-height: 100vh;
}

/* === 移动端顶部导航栏 === */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: rgba(8, 13, 26, 0.95);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 999;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
}

.mobile-header .brand-text {
  font-size: 1.1rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hamburger {
  width: 36px;
  height: 36px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 998;
}

/* === Hero 轮播区 === */
.hero-carousel {
  position: relative;
  width: 100%;
  height: 520px;
  overflow: hidden;
}

.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.8s ease;
}

.hero-slide.active { opacity: 1; }

.hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(8, 13, 26, 0.95) 0%, rgba(8, 13, 26, 0.3) 50%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 48px 48px 56px;
}

.hero-overlay h1 {
  font-size: 2.6rem;
  font-weight: 900;
  margin-bottom: 14px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

.hero-overlay h1 .highlight {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-overlay p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 24px;
}

.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: var(--gradient-main);
  color: #fff;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-neon);
  color: #fff;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--glass-border);
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
}

.btn-outline:hover {
  border-color: var(--neon-purple);
  background: var(--glass-bg);
  color: #fff;
}

.hero-dots {
  position: absolute;
  bottom: 20px;
  right: 48px;
  display: flex;
  gap: 10px;
}

.hero-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}

.hero-dots span.active {
  background: var(--neon-purple);
  box-shadow: 0 0 10px var(--neon-purple);
  width: 28px;
  border-radius: 5px;
}

/* === 通用区块 === */
.section {
  padding: 60px 48px;
}

.section-header {
  margin-bottom: 36px;
}

.section-header h2 {
  font-size: 1.8rem;
  margin-bottom: 10px;
}

.section-header h2 .accent {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1rem;
}

.section-alt { background: var(--dark-bg); }

/* === 视频卡片瀑布流（原创布局） === */
.video-masonry {
  columns: 3;
  column-gap: 20px;
}

.video-card {
  break-inside: avoid;
  margin-bottom: 20px;
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
}

.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-neon);
  border-color: var(--neon-purple);
}

.video-thumb {
  position: relative;
  overflow: hidden;
}

.video-thumb img {
  width: 100%;
  transition: transform 0.5s ease;
}

.video-card:hover .video-thumb img { transform: scale(1.08); }

.play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  width: 56px;
  height: 56px;
  background: var(--gradient-main);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
  box-shadow: 0 0 30px rgba(139, 92, 246, 0.5);
}

.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:hover .play-btn {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}

.video-info { padding: 16px; }

.video-info h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.video-rating { color: var(--accent-gold); font-weight: 600; }

.video-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* === 精选推荐（大卡片） === */
.featured-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

.featured-card:hover {
  box-shadow: var(--shadow-neon);
  border-color: var(--neon-purple);
}

.featured-card .featured-img {
  position: relative;
  overflow: hidden;
}

.featured-card .featured-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.featured-card:hover .featured-img img { transform: scale(1.05); }

.featured-card .featured-img .play-btn {
  width: 72px;
  height: 72px;
}

.featured-card .featured-img .play-btn::after {
  border-width: 14px 0 14px 24px;
}

.featured-body { padding: 40px; display: flex; flex-direction: column; justify-content: center; }

.featured-body .tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--neon-purple);
  font-weight: 600;
  margin-bottom: 16px;
  width: fit-content;
}

.featured-body h3 { font-size: 1.5rem; margin-bottom: 14px; }

.featured-body p { color: var(--text-secondary); margin-bottom: 20px; font-size: 0.95rem; }

/* === 频道分类导航 === */
.channel-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.channel-item {
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
}

.channel-item:hover {
  transform: translateY(-4px);
  border-color: var(--neon-purple);
  box-shadow: var(--shadow-neon);
  background: var(--glass-bg);
}

.channel-icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 14px;
  background: var(--gradient-main);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.channel-item h3 { font-size: 1rem; margin-bottom: 6px; }

.channel-item p { font-size: 0.82rem; color: var(--text-muted); }

/* === AI赋能专区 === */
.ai-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.ai-card {
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.ai-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-main);
  opacity: 0;
  transition: var(--transition);
}

.ai-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-neon); }
.ai-card:hover::before { opacity: 1; }

.ai-card .ai-icon {
  width: 48px;
  height: 48px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 18px;
}

.ai-card h3 { font-size: 1.05rem; margin-bottom: 10px; }
.ai-card p { font-size: 0.88rem; color: var(--text-secondary); }

/* === 社区功能 === */
.community-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.community-card {
  display: flex;
  gap: 20px;
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition);
}

.community-card:hover {
  border-color: var(--neon-pink);
  box-shadow: 0 0 20px rgba(236, 72, 153, 0.2);
}

.community-card .comm-icon {
  width: 56px;
  height: 56px;
  min-width: 56px;
  background: linear-gradient(135deg, var(--neon-pink), var(--neon-purple));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.community-card h3 { font-size: 1rem; margin-bottom: 6px; }
.community-card p { font-size: 0.85rem; color: var(--text-secondary); }

/* === 专家团队 === */
.experts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.expert-card {
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
}

.expert-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-neon);
}

.expert-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  margin: 0 auto 18px;
  overflow: hidden;
  border: 3px solid var(--glass-border);
  transition: var(--transition);
}

.expert-card:hover .expert-avatar { border-color: var(--neon-purple); }

.expert-avatar img { width: 100%; height: 100%; object-fit: cover; }

.expert-card h3 { font-size: 1.1rem; margin-bottom: 4px; }

.expert-card .title {
  font-size: 0.85rem;
  color: var(--neon-purple);
  font-weight: 600;
  margin-bottom: 12px;
}

.expert-card p { font-size: 0.85rem; color: var(--text-secondary); }

/* === 用户评价 === */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.review-card {
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition);
}

.review-card:hover { border-color: var(--neon-purple); }

.review-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}

.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1.1rem;
}

.review-name { font-weight: 600; font-size: 0.95rem; }

.review-location { font-size: 0.78rem; color: var(--text-muted); }

.review-stars { color: var(--accent-gold); font-size: 0.9rem; margin-bottom: 10px; }

.review-text { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; }

.review-date { font-size: 0.75rem; color: var(--text-muted); margin-top: 10px; }

/* === 关于我们 === */
.about-content {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: center;
}

.about-text h3 { font-size: 1.3rem; margin-bottom: 16px; }

.about-text p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
  line-height: 1.8;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.stat-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 18px;
  text-align: center;
}

.stat-item .num {
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-item .label { font-size: 0.82rem; color: var(--text-muted); margin-top: 4px; }

/* === 资质与合规 === */
.compliance-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.compliance-item {
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 24px 18px;
  text-align: center;
  transition: var(--transition);
}

.compliance-item:hover { border-color: var(--neon-purple); }

.compliance-item .comp-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.compliance-item h4 { font-size: 0.95rem; margin-bottom: 6px; }
.compliance-item p { font-size: 0.8rem; color: var(--text-muted); }

/* === FAQ手风琴 === */
.faq-list { max-width: 800px; }

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover { border-color: var(--neon-purple); }

.faq-question {
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  user-select: none;
}

.faq-question .arrow {
  transition: transform 0.3s ease;
  font-size: 1.2rem;
  color: var(--text-muted);
}

.faq-item.open .faq-question .arrow { transform: rotate(180deg); color: var(--neon-purple); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 24px 18px;
}

.faq-answer p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.8; }

/* === 热门标签云 === */
.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tag-item {
  padding: 8px 20px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: var(--transition);
  cursor: pointer;
}

.tag-item:hover {
  background: var(--gradient-main);
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px);
}

/* === 支付方式 === */
.payment-methods {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  align-items: center;
}

.payment-item {
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 14px 28px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
}

.payment-item:hover { border-color: var(--neon-purple); }

/* === 负责任观影 === */
.responsible-box {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(236, 72, 153, 0.1));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.responsible-box h3 { font-size: 1.2rem; margin-bottom: 14px; }
.responsible-box p { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.8; margin-bottom: 10px; }

/* === 页脚 === */
.site-footer {
  background: var(--darker-bg);
  border-top: 1px solid var(--glass-border);
  padding: 48px 48px 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 36px;
}

.footer-brand .brand-text {
  font-size: 1.3rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
  display: inline-block;
}

.footer-brand p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.7; }

.footer-col h4 {
  font-size: 0.95rem;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-col a {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 5px 0;
  transition: var(--transition);
}

.footer-col a:hover { color: var(--neon-purple); padding-left: 6px; }

.footer-bottom {
  border-top: 1px solid var(--glass-border);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* === 面包屑 === */
.breadcrumb {
  padding: 16px 48px;
  font-size: 0.85rem;
  color: var(--text-muted);
  background: var(--dark-bg);
  border-bottom: 1px solid var(--glass-border);
}

.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--neon-purple); }
.breadcrumb span { margin: 0 8px; }

/* === 内页通用 === */
.page-hero {
  padding: 60px 48px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.15), rgba(236, 72, 153, 0.1));
  border-bottom: 1px solid var(--glass-border);
}

.page-hero h1 { font-size: 2.2rem; margin-bottom: 12px; }
.page-hero p { color: var(--text-secondary); font-size: 1.05rem; max-width: 700px; }

.page-content {
  padding: 48px;
}

.page-content article {
  max-width: 900px;
}

.page-content article h2 {
  font-size: 1.4rem;
  margin: 32px 0 16px;
  padding-left: 14px;
  border-left: 3px solid var(--neon-purple);
}

.page-content article p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.85;
}

/* === 搜索框 === */
.search-box {
  position: relative;
  max-width: 400px;
  margin-top: 20px;
}

.search-box input {
  width: 100%;
  padding: 12px 20px 12px 44px;
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
}

.search-box input:focus { border-color: var(--neon-purple); box-shadow: var(--shadow-neon); }

.search-box input::placeholder { color: var(--text-muted); }

.search-box .search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1rem;
}

/* === APP下载页 === */
.download-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 80px 48px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.12), rgba(236, 72, 153, 0.08));
}

.download-info h1 { font-size: 2.4rem; margin-bottom: 16px; }
.download-info p { color: var(--text-secondary); font-size: 1.05rem; margin-bottom: 28px; line-height: 1.8; }

.download-btns { display: flex; gap: 14px; flex-wrap: wrap; }

.download-mockup { text-align: center; }
.download-mockup img { max-height: 480px; margin: 0 auto; border-radius: var(--radius-lg); }

/* === 响应式 === */
@media (max-width: 1200px) {
  .video-masonry { columns: 2; }
  .channel-grid { grid-template-columns: repeat(3, 1fr); }
  .compliance-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 992px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay.show { display: block; }
  .mobile-header { display: flex; }
  .main-wrap { margin-left: 0; padding-top: 60px; }
  .hero-carousel { height: 400px; }
  .hero-overlay { padding: 24px 24px 36px; }
  .hero-overlay h1 { font-size: 1.8rem; }
  .section { padding: 40px 24px; }
  .featured-card { grid-template-columns: 1fr; }
  .about-content { grid-template-columns: 1fr; }
  .experts-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-features { grid-template-columns: repeat(2, 1fr); }
  .download-hero { grid-template-columns: 1fr; padding: 40px 24px; }
  .breadcrumb { padding: 12px 24px; }
  .page-hero { padding: 40px 24px; }
  .page-content { padding: 32px 24px; }
  .site-footer { padding: 36px 24px 20px; }
}

@media (max-width: 640px) {
  .video-masonry { columns: 1; }
  .channel-grid { grid-template-columns: repeat(2, 1fr); }
  .community-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .experts-grid { grid-template-columns: 1fr; }
  .ai-features { grid-template-columns: 1fr; }
  .compliance-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-carousel { height: 320px; }
  .hero-overlay h1 { font-size: 1.4rem; }
  .section-header h2 { font-size: 1.4rem; }
  .about-stats { grid-template-columns: repeat(2, 1fr); }
}