/* ============================================================
   糖心vlog 全站样式 | scafvu.cn
   Brand: 糖心vlog | 国内影视传媒公司 + 视频社区
   百度SEO EEAT标准 · 原创深色主题配色
   ============================================================ */

/* ---------- CSS变量（原创配色） ---------- */
:root {
  --primary: #E8447A;
  --primary-dark: #C2305F;
  --primary-light: #FF7B9C;
  --accent: #9B59B6;
  --accent-light: #C39BD3;
  --dark: #0D0D1A;
  --bg-main: #111120;
  --bg-card: #1A1A2E;
  --bg-card2: #22223A;
  --bg-card3: #2A2A40;
  --border: rgba(255,255,255,0.07);
  --border-hover: rgba(232,68,122,0.35);
  --text-main: #F0F0F8;
  --text-sub: #9090B0;
  --text-light: #5A5A78;
  --gradient-main: linear-gradient(135deg, #E8447A 0%, #FF7B54 50%, #9B59B6 100%);
  --gradient-dark: linear-gradient(135deg, #0D0D1A 0%, #1A0A2E 100%);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.5);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.6);
  --shadow-primary: 0 4px 24px rgba(232,68,122,0.4);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 32px;
  --nav-h: 68px;
  --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- Reset ---------- */
*, *::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', 'Noto Sans SC', sans-serif;
  background: var(--dark);
  color: var(--text-main);
  line-height: 1.75;
  overflow-x: hidden;
}
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; color: inherit; }
input, textarea, select { font-family: inherit; }
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--text-main); }
p { margin-bottom: 0; }

/* ---------- 容器 ---------- */
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
.container-sm { max-width: 900px; margin: 0 auto; padding: 0 24px; }
.section { padding: 72px 0; }
.section-sm { padding: 48px 0; }

/* ============================================================
   顶部公告栏
   ============================================================ */
.top-bar {
  background: var(--gradient-main);
  color: #fff;
  text-align: center;
  padding: 9px 20px;
  font-size: 0.84rem;
  font-weight: 500;
  letter-spacing: 0.3px;
}
.top-bar a { color: #fff; text-decoration: underline; font-weight: 700; }

/* ============================================================
   导航栏
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13,13,26,0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  height: var(--nav-h);
}
.header-inner {
  display: flex;
  align-items: center;
  height: var(--nav-h);
  gap: 8px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  margin-right: 24px;
  text-decoration: none;
}
.site-logo img.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: cover;
  border: 1.5px solid rgba(232,68,122,0.4);
}
.site-logo .logo-text {
  font-size: 1.3rem;
  font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
  letter-spacing: -0.5px;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
}
.site-nav a {
  padding: 7px 13px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-sub);
  white-space: nowrap;
  transition: var(--transition);
}
.site-nav a:hover, .site-nav a.active {
  color: var(--text-main);
  background: rgba(255,255,255,0.07);
}
.site-nav a.active { color: var(--primary-light); }
.header-search {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 7px 16px;
  gap: 8px;
  min-width: 180px;
  max-width: 240px;
  transition: var(--transition);
}
.header-search:focus-within {
  border-color: var(--primary);
  background: rgba(232,68,122,0.07);
}
.header-search input {
  border: none;
  background: none;
  outline: none;
  font-size: 0.85rem;
  flex: 1;
  color: var(--text-main);
}
.header-search input::placeholder { color: var(--text-light); }
.header-search button { color: var(--text-light); font-size: 0.95rem; transition: var(--transition); }
.header-search button:hover { color: var(--primary-light); }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
  margin-left: auto;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================================
   搜索栏（导航下方）
   ============================================================ */
.search-bar-section {
  background: var(--bg-card);
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.search-bar-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 700px;
  margin: 0 auto;
  padding: 0 24px;
}
.search-bar-inner input {
  flex: 1;
  background: rgba(255,255,255,0.06);
  border: 1.5px solid var(--border);
  border-radius: 24px;
  padding: 10px 20px;
  color: var(--text-main);
  font-size: 0.92rem;
  outline: none;
  transition: var(--transition);
}
.search-bar-inner input::placeholder { color: var(--text-light); }
.search-bar-inner input:focus { border-color: var(--primary-light); background: rgba(232,68,122,0.06); }
.search-bar-inner button {
  background: var(--gradient-main);
  color: #fff;
  border-radius: 24px;
  padding: 10px 24px;
  font-size: 0.88rem;
  font-weight: 700;
  transition: var(--transition);
  white-space: nowrap;
}
.search-bar-inner button:hover { opacity: 0.88; transform: translateY(-1px); }
.search-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 8px;
  justify-content: center;
}
.search-tags span {
  font-size: 0.78rem;
  color: var(--text-light);
  cursor: pointer;
  transition: var(--transition);
}
.search-tags span:hover { color: var(--primary-light); }
.search-tags span::before { content: '#'; margin-right: 2px; }

/* ============================================================
   按钮
   ============================================================ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-main);
  color: #fff;
  padding: 13px 32px;
  border-radius: var(--radius-xl);
  font-size: 0.97rem;
  font-weight: 700;
  box-shadow: var(--shadow-primary);
  transition: var(--transition);
  text-decoration: none;
  border: none;
  cursor: pointer;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(232,68,122,0.5); color: #fff; }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text-main);
  padding: 12px 28px;
  border-radius: var(--radius-xl);
  font-size: 0.97rem;
  font-weight: 600;
  border: 1.5px solid rgba(255,255,255,0.2);
  transition: var(--transition);
  text-decoration: none;
}
.btn-outline:hover { border-color: var(--primary-light); color: var(--primary-light); background: rgba(232,68,122,0.07); }
.btn-sm {
  display: inline-flex;
  align-items: center;
  padding: 7px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  transition: var(--transition);
  text-decoration: none;
}
.btn-sm.primary { background: var(--gradient-main); color: #fff; }
.btn-sm.primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-primary); }
.btn-sm.outline { border: 1.5px solid var(--border); color: var(--text-sub); }
.btn-sm.outline:hover { border-color: var(--primary-light); color: var(--primary-light); }

/* ============================================================
   Hero Banner
   ============================================================ */
.hero-section {
  position: relative;
  min-height: 540px;
  overflow: hidden;
  display: flex;
  align-items: center;
  padding: 80px 0 60px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/hero_banner.jpg');
  background-size: cover;
  background-position: center;
  filter: brightness(0.35);
  transform: scale(1.04);
  transition: transform 10s ease;
}
.hero-section:hover .hero-bg { transform: scale(1.07); }
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13,13,26,0.88) 0%, rgba(232,68,122,0.2) 60%, rgba(155,89,182,0.15) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  color: #fff;
  max-width: 700px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(232,68,122,0.2);
  border: 1px solid rgba(232,68,122,0.45);
  border-radius: 24px;
  padding: 5px 16px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--primary-light);
  margin-bottom: 18px;
  backdrop-filter: blur(8px);
}
.hero-badge::before { content: '▶'; font-size: 0.65rem; }
.hero-title {
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 18px;
  color: #fff;
  letter-spacing: -1px;
}
.hero-title .brand { color: var(--primary-light); }
.hero-desc {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.82);
  margin-bottom: 32px;
  line-height: 1.85;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats {
  display: flex;
  gap: 36px;
  flex-wrap: wrap;
  position: relative;
  z-index: 2;
}
.hero-stat { color: #fff; }
.hero-stat .num { display: block; font-size: 1.7rem; font-weight: 800; color: var(--primary-light); }
.hero-stat .label { font-size: 0.78rem; color: rgba(255,255,255,0.6); }

/* ============================================================
   统计数字栏
   ============================================================ */
.stats-bar {
  background: var(--gradient-main);
  padding: 32px 0;
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat-item { text-align: center; color: #fff; }
.stat-num { font-size: 2rem; font-weight: 900; display: block; }
.stat-label { font-size: 0.82rem; opacity: 0.85; margin-top: 4px; display: block; }

/* ============================================================
   区块标题
   ============================================================ */
.section-header { text-align: center; margin-bottom: 48px; }
.section-header .tag {
  display: inline-block;
  background: rgba(232,68,122,0.15);
  color: var(--primary-light);
  border-radius: 24px;
  padding: 4px 16px;
  font-size: 0.78rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}
.section-header h2 { font-size: clamp(1.4rem, 3vw, 2rem); margin-bottom: 12px; }
.section-header p { color: var(--text-sub); max-width: 580px; margin: 0 auto; font-size: 0.93rem; }
.section-header-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 12px;
}
.section-header-row h2 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
.view-more {
  color: var(--primary-light);
  font-size: 0.88rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition);
  white-space: nowrap;
}
.view-more:hover { gap: 8px; color: var(--primary); }
.view-more::after { content: '→'; }

/* ============================================================
   分类标签
   ============================================================ */
.cat-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.cat-tab {
  padding: 8px 18px;
  border-radius: 24px;
  font-size: 0.85rem;
  font-weight: 600;
  border: 1.5px solid var(--border);
  color: var(--text-sub);
  background: var(--bg-card);
  transition: var(--transition);
  cursor: pointer;
}
.cat-tab:hover { color: var(--text-main); border-color: rgba(255,255,255,0.15); }
.cat-tab.active {
  background: var(--gradient-main);
  border-color: transparent;
  color: #fff;
}

/* ============================================================
   视频卡片 - 核心交互
   ============================================================ */
.video-grid { display: grid; gap: 18px; }
.video-grid-4 { grid-template-columns: repeat(4, 1fr); }
.video-grid-3 { grid-template-columns: repeat(3, 1fr); }

.video-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-hover);
}

/* 视频缩略图容器 */
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #08080F;
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
  display: block;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }

/* ★★★ 播放按钮 - 鼠标悬停显示 ★★★ */
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0);
  opacity: 0;
  transition: opacity 0.28s ease, background 0.28s ease;
  z-index: 2;
}
.video-card:hover .video-play-btn {
  opacity: 1;
  background: rgba(0,0,0,0.42);
}
.play-icon {
  width: 54px;
  height: 54px;
  background: rgba(232,68,122,0.92);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.75);
  transition: transform 0.28s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 0 0 10px rgba(232,68,122,0.2), 0 4px 20px rgba(232,68,122,0.5);
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon::after {
  content: '';
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 4px;
}

/* 时长标签 */
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.78);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  z-index: 3;
}
/* 画质标签 */
.video-quality {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(232,68,122,0.88);
  color: #fff;
  font-size: 0.62rem;
  font-weight: 800;
  padding: 2px 7px;
  border-radius: 4px;
  letter-spacing: 0.5px;
  z-index: 3;
}
.video-info { padding: 14px; }
.video-title {
  font-size: 0.87rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text-main);
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  gap: 10px;
  font-size: 0.73rem;
  color: var(--text-light);
  flex-wrap: wrap;
}
.video-tag {
  display: inline-block;
  background: rgba(232,68,122,0.12);
  color: var(--primary-light);
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.7rem;
  font-weight: 700;
}
.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(239,68,68,0.15);
  color: #EF4444;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.7rem;
  font-weight: 700;
}
.live-dot {
  width: 6px;
  height: 6px;
  background: #EF4444;
  border-radius: 50%;
  animation: livePulse 1.2s infinite;
}
@keyframes livePulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.6); }
}

/* ============================================================
   精选视频大图布局
   ============================================================ */
.video-featured {
  display: grid;
  grid-template-columns: 1.8fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 16px;
}
.video-featured-main {
  grid-row: 1 / 3;
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  border: 1px solid var(--border);
}
.video-featured-main img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 300px;
  transition: transform 0.4s ease;
  display: block;
}
.video-featured-main:hover img { transform: scale(1.04); }
.video-featured-main .video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0);
  opacity: 0;
  transition: opacity 0.28s ease, background 0.28s ease;
  z-index: 2;
}
.video-featured-main:hover .video-play-btn {
  opacity: 1;
  background: rgba(0,0,0,0.38);
}
.video-featured-main:hover .play-icon { transform: scale(1); }
.video-featured-main .overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 28px;
  background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, transparent 100%);
  color: #fff;
  z-index: 3;
}
.video-featured-main .overlay h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; color: #fff; }

/* ============================================================
   AI赋能区
   ============================================================ */
.ai-section {
  background: linear-gradient(135deg, #0D0D1A 0%, #1A0A2E 50%, #0D1A2E 100%);
  position: relative;
  overflow: hidden;
}
.ai-section::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -15%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(155,89,182,0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.ai-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.ai-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  transition: var(--transition);
}
.ai-card:hover {
  background: rgba(155,89,182,0.1);
  border-color: rgba(155,89,182,0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.ai-icon { font-size: 2.2rem; margin-bottom: 14px; }
.ai-card h3 { color: #fff; margin-bottom: 10px; font-size: 1rem; font-weight: 700; }
.ai-card p { font-size: 0.86rem; color: rgba(255,255,255,0.65); line-height: 1.75; margin-bottom: 14px; }
.ai-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.ai-tag {
  background: rgba(232,68,122,0.18);
  color: var(--primary-light);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 24px;
}

/* ============================================================
   社区功能
   ============================================================ */
.community-features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.community-feat {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 22px;
  border: 1px solid var(--border);
  transition: var(--transition);
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.community-feat:hover { border-color: var(--border-hover); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.feat-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  background: rgba(232,68,122,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}
.feat-body h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 6px; }
.feat-body p { font-size: 0.83rem; color: var(--text-sub); line-height: 1.65; }

/* ============================================================
   专家团队
   ============================================================ */
.expert-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.expert-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  text-align: center;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.expert-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: var(--border-hover); }
.expert-avatar {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 16px;
  border: 3px solid var(--primary);
  display: block;
}
.expert-name { font-size: 1.1rem; font-weight: 800; margin-bottom: 4px; }
.expert-role { font-size: 0.82rem; color: var(--primary-light); font-weight: 600; margin-bottom: 12px; }
.expert-desc { font-size: 0.84rem; color: var(--text-sub); margin-bottom: 16px; line-height: 1.7; }
.expert-awards { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; margin-bottom: 16px; }
.award-badge {
  background: rgba(155,89,182,0.15);
  color: var(--accent-light);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 24px;
}
.expert-actions { display: flex; gap: 10px; justify-content: center; }

/* ============================================================
   合作品牌
   ============================================================ */
.partners-section { background: var(--bg-card); padding: 52px 0; border-top: 1px solid var(--border); }
.partners-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  align-items: center;
}
.partner-item {
  background: rgba(255,255,255,0.04);
  border-radius: var(--radius-md);
  padding: 16px 10px;
  text-align: center;
  transition: var(--transition);
  border: 1px solid var(--border);
}
.partner-item:hover { background: rgba(232,68,122,0.1); border-color: var(--border-hover); }
.partner-name { font-size: 0.85rem; font-weight: 700; color: var(--text-sub); }

/* ============================================================
   加入步骤
   ============================================================ */
.join-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.join-step {
  text-align: center;
  padding: 32px 18px 24px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
}
.join-step:hover { border-color: var(--border-hover); box-shadow: var(--shadow-md); transform: translateY(-3px); }
.step-num {
  width: 32px;
  height: 32px;
  background: var(--gradient-main);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 800;
  margin: 0 auto 14px;
}
.step-icon { font-size: 2rem; margin-bottom: 12px; }
.join-step h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; }
.join-step p { font-size: 0.83rem; color: var(--text-sub); line-height: 1.65; }

/* ============================================================
   联系区
   ============================================================ */
.contact-section { background: var(--gradient-dark); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact-info h3 { color: #fff; margin-bottom: 22px; font-size: 1.1rem; }
.contact-item { display: flex; gap: 14px; margin-bottom: 18px; align-items: flex-start; }
.contact-icon {
  width: 42px;
  height: 42px;
  background: rgba(232,68,122,0.18);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.contact-text { font-size: 0.88rem; color: rgba(255,255,255,0.7); }
.contact-text strong { display: block; color: #fff; margin-bottom: 2px; font-size: 0.82rem; }
.qr-row { display: flex; gap: 20px; margin-top: 24px; flex-wrap: wrap; }
.qr-item { text-align: center; }
.qr-item img { width: 110px; height: 110px; border-radius: var(--radius-sm); border: 2px solid rgba(255,255,255,0.12); }
.qr-item p { font-size: 0.75rem; color: rgba(255,255,255,0.5); margin-top: 7px; }
.community-links { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.community-link {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: var(--transition);
  text-decoration: none;
}
.community-link:hover { background: rgba(232,68,122,0.12); border-color: var(--border-hover); }
.community-link .icon { font-size: 1.4rem; flex-shrink: 0; }
.community-link .text strong { display: block; font-size: 0.88rem; color: #fff; }
.community-link .text span { font-size: 0.75rem; color: rgba(255,255,255,0.5); }
.notice-bar {
  background: rgba(232,68,122,0.08);
  border-left: 3px solid var(--primary);
  padding: 12px 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
  margin-top: 20px;
}

/* ============================================================
   联系表单
   ============================================================ */
.contact-form .form-group { margin-bottom: 16px; }
.contact-form label { display: block; font-size: 0.82rem; color: rgba(255,255,255,0.55); margin-bottom: 6px; }
.form-input {
  width: 100%;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-sm);
  padding: 11px 16px;
  color: var(--text-main);
  font-size: 0.88rem;
  outline: none;
  transition: var(--transition);
  resize: vertical;
}
.form-input:focus { border-color: var(--primary-light); background: rgba(232,68,122,0.06); }
.form-input::placeholder { color: rgba(255,255,255,0.25); }
select.form-input option { background: #1A1A2E; color: var(--text-main); }

/* ============================================================
   FAQ
   ============================================================ */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: rgba(232,68,122,0.25); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.93rem;
  background: var(--bg-card);
  transition: var(--transition);
  gap: 12px;
  color: var(--text-main);
}
.faq-question:hover { background: var(--bg-card2); }
.faq-question.active { color: var(--primary-light); background: rgba(232,68,122,0.06); }
.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  transition: var(--transition);
  color: var(--text-sub);
}
.faq-question.active .faq-icon {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  transform: rotate(45deg);
}
.faq-answer {
  padding: 0 22px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.38s ease, padding 0.38s ease;
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.8;
  background: var(--bg-card);
}
.faq-answer.open { max-height: 320px; padding: 0 22px 20px; }

/* ============================================================
   用户评价
   ============================================================ */
.reviews-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.review-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 20px;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.review-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: var(--border-hover); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.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: 1rem;
  flex-shrink: 0;
}
.review-user strong { display: block; font-size: 0.88rem; font-weight: 700; color: var(--text-main); }
.review-user span { font-size: 0.75rem; color: var(--text-light); }
.stars { color: #F59E0B; font-size: 0.85rem; margin-bottom: 8px; letter-spacing: 1px; }
.review-text { font-size: 0.84rem; color: var(--text-sub); line-height: 1.7; }
.review-tag { margin-top: 10px; }

/* ============================================================
   分享区
   ============================================================ */
.share-section { background: var(--bg-card); border-top: 1px solid var(--border); padding: 24px 0; }
.share-inner { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; justify-content: center; }
.share-label { font-size: 0.88rem; color: var(--text-sub); font-weight: 500; }
.share-btns { display: flex; gap: 10px; flex-wrap: wrap; }
.share-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 24px;
  font-size: 0.82rem;
  font-weight: 600;
  transition: var(--transition);
  border: 1.5px solid transparent;
}
.share-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.share-wechat { background: #07C160; color: #fff; }
.share-weibo { background: #E6162D; color: #fff; }
.share-douyin { background: #010101; color: #fff; border-color: #69C9D0; }
.share-bilibili { background: #00A1D6; color: #fff; }

/* ============================================================
   页脚
   ============================================================ */
.site-footer { background: #08080F; border-top: 1px solid var(--border); padding: 56px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 48px; }
.footer-brand .footer-logo-bottom { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 14px; text-decoration: none; }
.footer-brand .footer-logo-bottom img { width: 32px; height: 32px; border-radius: 8px; border: 1px solid rgba(232,68,122,0.3); }
.footer-brand .logo-text { font-size: 1.3rem; font-weight: 900; background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.footer-brand p { font-size: 0.84rem; color: rgba(255,255,255,0.4); line-height: 1.8; margin-bottom: 8px; }
.footer-col h5 { color: rgba(255,255,255,0.75); font-size: 0.9rem; font-weight: 700; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 9px; }
.footer-col ul li a { font-size: 0.84rem; color: rgba(255,255,255,0.38); transition: var(--transition); }
.footer-col ul li a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.3);
  flex-wrap: wrap;
  gap: 10px;
  border-top: 1px solid var(--border);
}
.footer-bottom a { color: rgba(255,255,255,0.4); }
.footer-bottom a:hover { color: var(--primary-light); }

/* ============================================================
   面包屑
   ============================================================ */
.breadcrumb {
  padding: 14px 0;
  font-size: 0.83rem;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-sub); }
.breadcrumb a:hover { color: var(--primary-light); }
.breadcrumb .sep { color: var(--text-light); }
.breadcrumb .current { color: var(--primary-light); font-weight: 600; }

/* ============================================================
   内页Hero
   ============================================================ */
.inner-hero {
  background: var(--gradient-dark);
  padding: 52px 0 40px;
  border-bottom: 1px solid var(--border);
}
.inner-hero h1 { color: #fff; margin-bottom: 8px; font-size: clamp(1.5rem, 3vw, 2.2rem); }
.inner-hero p { color: rgba(255,255,255,0.65); font-size: 0.95rem; }

/* ============================================================
   分页
   ============================================================ */
.pagination { display: flex; gap: 8px; justify-content: center; margin-top: 44px; }
.page-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.88rem;
  font-weight: 600;
  border: 1.5px solid var(--border);
  color: var(--text-sub);
  background: var(--bg-card);
  transition: var(--transition);
  cursor: pointer;
}
.page-btn:hover, .page-btn.active {
  background: var(--gradient-main);
  border-color: transparent;
  color: #fff;
}

/* ============================================================
   关于页
   ============================================================ */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.about-text h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); font-weight: 800; margin-bottom: 16px; }
.about-text p { font-size: 0.9rem; color: var(--text-sub); line-height: 1.85; margin-bottom: 14px; }
.about-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 28px; }
.about-stat { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 16px; text-align: center; }
.about-stat .num { display: block; font-size: 1.4rem; font-weight: 800; color: var(--primary-light); }
.about-stat .label { font-size: 0.76rem; color: var(--text-light); margin-top: 4px; display: block; }
.about-img img { border-radius: var(--radius-lg); width: 100%; }
.values-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.value-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 24px; text-align: center; transition: var(--transition); }
.value-card:hover { border-color: var(--border-hover); transform: translateY(-3px); box-shadow: var(--shadow-md); }
.value-icon { font-size: 2rem; margin-bottom: 12px; }
.value-card h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; }
.value-card p { font-size: 0.82rem; color: var(--text-sub); line-height: 1.65; }

/* ============================================================
   通知栏
   ============================================================ */
.notice-bar-top {
  background: rgba(232,68,122,0.08);
  border-left: 4px solid var(--primary);
  padding: 12px 18px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.86rem;
  color: var(--text-sub);
  margin-bottom: 20px;
}

/* ============================================================
   移动端菜单
   ============================================================ */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  background: rgba(13,13,26,0.98);
  backdrop-filter: blur(16px);
  z-index: 999;
  box-shadow: var(--shadow-lg);
  padding: 16px 20px;
  flex-direction: column;
  gap: 4px;
  border-bottom: 1px solid var(--border);
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.93rem;
  font-weight: 500;
  color: var(--text-sub);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a:hover { background: rgba(255,255,255,0.05); color: var(--primary-light); }

/* ============================================================
   滚动条
   ============================================================ */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--dark); }
::-webkit-scrollbar-thumb { background: rgba(232,68,122,0.4); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

/* ============================================================
   选中颜色
   ============================================================ */
::selection { background: rgba(232,68,122,0.25); color: var(--primary-light); }

/* ============================================================
   动画
   ============================================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.06); }
}
.animate-in { animation: fadeInUp 0.55s ease both; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1100px) {
  .video-grid-4 { grid-template-columns: repeat(3, 1fr); }
  .partners-grid { grid-template-columns: repeat(4, 1fr); }
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; }
  .footer-grid > .footer-col:last-child { display: none; }
}
@media (max-width: 900px) {
  .site-nav { display: none; }
  .hamburger { display: flex; }
  .header-search { display: none; }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .video-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .video-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .join-steps { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .ai-grid { grid-template-columns: repeat(2, 1fr); }
  .community-features { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-stats { position: static; margin-top: 28px; }
  .about-grid { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: repeat(2, 1fr); }
  .video-featured { grid-template-columns: 1fr; grid-template-rows: auto; }
  .video-featured-main { grid-row: auto; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .section { padding: 48px 0; }
  .container { padding: 0 16px; }
  .video-grid, .video-grid-4, .video-grid-3 { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .expert-grid { grid-template-columns: 1fr; }
  .join-steps { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .ai-grid { grid-template-columns: 1fr; }
  .community-features { grid-template-columns: 1fr; }
  .partners-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .qr-row { flex-wrap: wrap; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .share-btns { flex-wrap: wrap; }
  .values-grid { grid-template-columns: 1fr; }
  .community-links { grid-template-columns: 1fr; }
}
@media (max-width: 400px) {
  .video-grid, .video-grid-4, .video-grid-3 { grid-template-columns: 1fr; }
}