/* =============================================
   糖心vlog - 主样式文件
   品牌色：玫瑰粉 #FF4E8B | 珊瑚橙 #FF7043
   背景色：深夜蓝 #0D0D1A | 卡片深 #161626
   ============================================= */

/* ---- 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: #0D0D1A;
  color: #E8E8F0;
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: color .25s; }
a:hover { color: #FF4E8B; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; outline: none; background: none; }

/* ---- CSS变量 ---- */
:root {
  --pink: #FF4E8B;
  --orange: #FF7043;
  --grad: linear-gradient(135deg, #FF4E8B 0%, #FF7043 100%);
  --grad-rev: linear-gradient(135deg, #FF7043 0%, #FF4E8B 100%);
  --dark: #0D0D1A;
  --card: #161626;
  --card2: #1E1E30;
  --border: rgba(255,78,139,0.2);
  --text: #E8E8F0;
  --text-muted: #9090A8;
  --radius: 12px;
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-pink: 0 4px 20px rgba(255,78,139,0.3);
}

/* ---- 滚动条 ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--dark); }
::-webkit-scrollbar-thumb { background: var(--pink); border-radius: 3px; }

/* ---- 顶部公告栏 ---- */
.top-bar {
  background: var(--grad);
  text-align: center;
  padding: 8px 20px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.5px;
  color: #fff;
}
.top-bar a { color: #fff; text-decoration: underline; }

/* ---- 导航栏 ---- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13,13,26,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
}
.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 20px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.nav-logo img.logo-img {
  height: 40px;
  width: auto;
}
.nav-logo img.favicon-img {
  height: 28px;
  width: 28px;
  border-radius: 6px;
}
.nav-logo .brand-name {
  font-size: 20px;
  font-weight: 700;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
}
.nav-menu a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  transition: all .25s;
  white-space: nowrap;
}
.nav-menu a:hover,
.nav-menu a.active {
  color: var(--pink);
  background: rgba(255,78,139,0.1);
}
.nav-search {
  display: flex;
  align-items: center;
  background: var(--card2);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 6px 16px;
  gap: 8px;
  flex-shrink: 0;
}
.nav-search input {
  background: none;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 14px;
  width: 160px;
}
.nav-search input::placeholder { color: var(--text-muted); }
.nav-search button {
  color: var(--pink);
  font-size: 16px;
  padding: 0;
  line-height: 1;
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.btn-login {
  padding: 8px 18px;
  border: 1px solid var(--pink);
  border-radius: 20px;
  font-size: 13px;
  color: var(--pink);
  transition: all .25s;
}
.btn-login:hover { background: var(--pink); color: #fff; }
.btn-join {
  padding: 8px 18px;
  background: var(--grad);
  border-radius: 20px;
  font-size: 13px;
  color: #fff;
  font-weight: 600;
  transition: opacity .25s;
}
.btn-join:hover { opacity: 0.85; }
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all .3s;
}

/* ---- 搜索栏（导航下方） ---- */
.search-bar-section {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
}
.search-bar-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
}
.search-main {
  flex: 1;
  display: flex;
  align-items: center;
  background: var(--card2);
  border: 1.5px solid var(--border);
  border-radius: 28px;
  padding: 10px 20px;
  gap: 10px;
  transition: border-color .25s;
}
.search-main:focus-within { border-color: var(--pink); }
.search-main input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 15px;
}
.search-main input::placeholder { color: var(--text-muted); }
.search-main .search-icon { color: var(--text-muted); font-size: 18px; }
.search-btn {
  padding: 10px 28px;
  background: var(--grad);
  border-radius: 24px;
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  transition: opacity .25s;
}
.search-btn:hover { opacity: 0.85; }
.search-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 8px;
}
.search-tags span { color: var(--text-muted); font-size: 13px; }
.search-tags a {
  font-size: 13px;
  color: var(--text-muted);
  padding: 3px 10px;
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: all .2s;
}
.search-tags a:hover { color: var(--pink); border-color: var(--pink); }

/* ---- 面包屑 ---- */
.breadcrumb {
  background: rgba(22,22,38,0.6);
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-muted);
}
.breadcrumb-list {
  max-width: 1280px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
}
.breadcrumb-list li { display: flex; align-items: center; gap: 6px; }
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--pink); }
.breadcrumb .sep { color: var(--border); }
.breadcrumb .current { color: var(--pink); }
.bc-sep { color: var(--border); font-size: 14px; }

/* ---- 容器 ---- */
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
.section { padding: 60px 0; }
.section-sm { padding: 40px 0; }

/* ---- 区块标题 ---- */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}
.section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
}
.section-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 24px;
  background: var(--grad);
  border-radius: 2px;
}
.section-more {
  font-size: 14px;
  color: var(--pink);
  display: flex;
  align-items: center;
  gap: 4px;
}
.section-more:hover { color: var(--orange); }

/* ---- Hero Banner ---- */
.hero {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  display: flex;
  align-items: center;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/hero-banner.jpg');
  background-size: cover;
  background-position: center;
  filter: brightness(0.45);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(13,13,26,0.9) 40%, transparent 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 24px;
  max-width: 600px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,78,139,0.15);
  border: 1px solid rgba(255,78,139,0.4);
  border-radius: 20px;
  padding: 5px 14px;
  font-size: 13px;
  color: var(--pink);
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.2;
  color: #fff;
  margin-bottom: 16px;
}
.hero h1 span {
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  font-size: 16px;
  color: rgba(255,255,255,0.75);
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-btns {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  background: var(--grad);
  border-radius: 28px;
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  transition: all .25s;
  box-shadow: var(--shadow-pink);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(255,78,139,0.45); color: #fff; }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border: 1.5px solid rgba(255,255,255,0.4);
  border-radius: 28px;
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  transition: all .25s;
}
.btn-outline:hover { border-color: var(--pink); color: var(--pink); }
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 40px;
  flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat .num {
  font-size: 28px;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-stat .label { font-size: 13px; color: var(--text-muted); }

/* ---- 视频卡片 ---- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.video-card {
  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all .3s;
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-pink);
  border-color: rgba(255,78,139,0.5);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #111;
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0);
  transition: background .3s;
}
.video-card:hover .video-play-btn { background: rgba(0,0,0,0.45); }
.play-icon {
  width: 52px;
  height: 52px;
  background: var(--grad);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.7);
  transition: all .3s;
  box-shadow: 0 4px 20px rgba(255,78,139,0.5);
}
.video-card:hover .play-icon { opacity: 1; transform: scale(1); }
.play-icon svg { width: 22px; height: 22px; fill: #fff; margin-left: 3px; }
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 12px;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--grad);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 4px;
}
.video-info {
  padding: 14px;
}
.video-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.5;
  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: 12px;
  color: var(--text-muted);
}
.video-author {
  display: flex;
  align-items: center;
  gap: 6px;
}
.video-author img {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  object-fit: cover;
}
.video-stats {
  display: flex;
  gap: 10px;
}
.video-stats span {
  display: flex;
  align-items: center;
  gap: 3px;
}

/* ---- 分类标签栏 ---- */
.cat-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.cat-tab {
  padding: 7px 18px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  border: 1px solid var(--border);
  background: var(--card);
  transition: all .25s;
  cursor: pointer;
}
.cat-tab:hover, .cat-tab.active {
  background: var(--grad);
  color: #fff;
  border-color: transparent;
}

/* ---- 专家卡片 ---- */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}
.expert-card {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: all .3s;
  text-align: center;
}
.expert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-pink);
}
.expert-avatar {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  object-position: top;
}
.expert-info { padding: 16px; }
.expert-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}
.expert-title {
  font-size: 13px;
  color: var(--pink);
  margin-bottom: 10px;
}
.expert-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 14px;
}
.expert-awards {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin-bottom: 14px;
}
.award-tag {
  font-size: 11px;
  padding: 3px 9px;
  background: rgba(255,78,139,0.1);
  border: 1px solid rgba(255,78,139,0.3);
  border-radius: 10px;
  color: var(--pink);
}
.expert-btns {
  display: flex;
  gap: 8px;
  justify-content: center;
}
.btn-sm {
  padding: 7px 14px;
  border-radius: 16px;
  font-size: 12px;
  font-weight: 600;
  transition: all .25s;
}
.btn-sm-pink {
  background: var(--grad);
  color: #fff;
}
.btn-sm-outline {
  border: 1px solid var(--pink);
  color: var(--pink);
}
.btn-sm-outline:hover { background: var(--pink); color: #fff; }

/* ---- 合作品牌Logo墙 ---- */
.partner-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: center;
}
.partner-logo {
  background: var(--card2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-muted);
  transition: all .25s;
  min-width: 120px;
  text-align: center;
}
.partner-logo:hover { border-color: var(--pink); color: var(--pink); }

/* ---- 加入社区步骤 ---- */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}
.step-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  position: relative;
  transition: all .3s;
}
.step-card:hover { border-color: var(--pink); transform: translateY(-3px); }
.step-num {
  width: 44px;
  height: 44px;
  background: var(--grad);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  margin: 0 auto 16px;
}
.step-icon { font-size: 28px; margin-bottom: 12px; }
.step-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.step-desc { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* ---- FAQ ---- */
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color .25s;
}
.faq-item.open { border-color: var(--pink); }
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  gap: 12px;
}
.faq-q .faq-icon {
  width: 24px;
  height: 24px;
  background: var(--grad);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  flex-shrink: 0;
  transition: transform .3s;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-a {
  display: none;
  padding: 0 20px 18px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}
.faq-item.open .faq-a { display: block; }

/* ---- 用户评论 ---- */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: all .3s;
}
.review-card:hover { border-color: var(--pink); transform: translateY(-2px); }
.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--grad);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.review-user { flex: 1; }
.review-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}
.review-date { font-size: 12px; color: var(--text-muted); }
.review-stars { color: #FFB800; font-size: 14px; }
.review-text {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}
.review-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 12px;
}
.review-tag {
  font-size: 11px;
  padding: 3px 9px;
  background: rgba(255,78,139,0.08);
  border: 1px solid rgba(255,78,139,0.2);
  border-radius: 10px;
  color: var(--pink);
}

/* ---- 联系/公司信息 ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}
.contact-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.contact-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 14px;
  color: var(--text-muted);
}
.contact-item .ci-icon {
  width: 36px;
  height: 36px;
  background: rgba(255,78,139,0.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
  color: var(--pink);
}
.contact-item strong { color: var(--text); display: block; margin-bottom: 2px; }
.qr-row {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 20px;
}
.qr-item { text-align: center; }
.qr-item img {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: 8px;
  border: 2px solid var(--border);
}
.qr-item p { font-size: 12px; color: var(--text-muted); margin-top: 6px; }

/* ---- 社交分享 ---- */
.share-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.share-label { font-size: 14px; color: var(--text-muted); }
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  transition: all .25s;
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.share-btn:hover { transform: translateY(-2px); }
.share-wechat:hover { border-color: #07C160; color: #07C160; }
.share-weibo:hover { border-color: #E6162D; color: #E6162D; }
.share-douyin:hover { border-color: #FE2C55; color: #FE2C55; }
.share-bilibili:hover { border-color: #00A1D6; color: #00A1D6; }

/* ---- 特色功能区 ---- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  transition: all .3s;
}
.feature-card:hover { border-color: var(--pink); transform: translateY(-4px); box-shadow: var(--shadow-pink); }
.feature-icon {
  font-size: 36px;
  margin-bottom: 14px;
}
.feature-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.feature-desc { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* ---- AI赋能区 ---- */
.ai-section { background: var(--card); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.ai-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.ai-content h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 16px;
  line-height: 1.3;
}
.ai-content h2 span {
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.ai-content p { font-size: 15px; color: var(--text-muted); line-height: 1.8; margin-bottom: 24px; }
.ai-features { display: flex; flex-direction: column; gap: 14px; margin-bottom: 28px; }
.ai-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text-muted);
}
.ai-feature-item .ai-dot {
  width: 8px;
  height: 8px;
  background: var(--grad);
  border-radius: 50%;
  flex-shrink: 0;
}
.ai-visual {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  aspect-ratio: 4/3;
}
.ai-visual img { width: 100%; height: 100%; object-fit: cover; }
.ai-badge {
  position: absolute;
  bottom: 16px;
  left: 16px;
  background: rgba(13,13,26,0.85);
  border: 1px solid var(--pink);
  border-radius: 10px;
  padding: 10px 16px;
  backdrop-filter: blur(8px);
}
.ai-badge .ab-title { font-size: 13px; font-weight: 700; color: var(--pink); }
.ai-badge .ab-val { font-size: 22px; font-weight: 800; color: #fff; }

/* ---- 页脚二维码区 ---- */
.footer-qr {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  justify-content: center;
  padding: 32px 0;
  border-top: 1px solid rgba(255,78,139,0.15);
  border-bottom: 1px solid rgba(255,78,139,0.15);
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.qr-contact { display: flex; flex-direction: column; justify-content: center; gap: 12px; font-size: 14px; color: #9090A8; }

/* ---- 页脚 ---- */
.footer {
  background: #080812;
  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 .brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-brand .brand-logo img { height: 36px; }
.footer-brand .brand-logo span {
  font-size: 18px;
  font-weight: 700;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}
.footer-social {
  display: flex;
  gap: 10px;
}
.social-btn {
  width: 36px;
  height: 36px;
  background: var(--card2);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--text-muted);
  transition: all .25s;
}
.social-btn:hover { background: var(--pink); border-color: var(--pink); color: #fff; }
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color .2s;
}
.footer-col ul li a:hover { color: var(--pink); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p { font-size: 13px; color: var(--text-muted); }
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--pink); }
.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-links a { font-size: 13px; color: var(--text-muted); }
.footer-links a:hover { color: var(--pink); }

/* ---- 直播/社区卡片 ---- */
.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: #E6162D;
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 4px;
}
.live-dot {
  width: 6px;
  height: 6px;
  background: #fff;
  border-radius: 50%;
  animation: pulse 1.2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ---- 内页 Hero ---- */
.page-hero {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 48px 0;
}
.page-hero h1 {
  font-size: 36px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 12px;
}
.page-hero h1 span {
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.page-hero p { font-size: 16px; color: var(--text-muted); line-height: 1.8; max-width: 600px; }

/* ---- 分页 ---- */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
}
.page-btn {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: all .25s;
  cursor: pointer;
}
.page-btn:hover, .page-btn.active {
  background: var(--grad);
  border-color: transparent;
  color: #fff;
}

/* ---- 统计数字 ---- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  transition: all .3s;
}
.stat-box:hover { border-color: var(--pink); }
.stat-num {
  font-size: 36px;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 6px;
}
.stat-label { font-size: 14px; color: var(--text-muted); }

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .ai-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .nav-menu { display: none; }
  .nav-hamburger { display: flex; }
  .nav-search { display: none; }
  .hero { min-height: 380px; }
  .hero-content { padding: 60px 24px; }
  .hero h1 { font-size: 28px; }
  .video-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section { padding: 40px 0; }
  .search-bar-section { display: none; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .ai-grid { gap: 28px; }
}
@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .hero-btns { flex-direction: column; }
  .hero-stats { gap: 20px; }
  .steps-grid { grid-template-columns: 1fr 1fr; }
}

/* ---- 移动端导航菜单 ---- */
.mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(13,13,26,0.98);
  z-index: 999;
  padding: 24px;
  flex-direction: column;
  gap: 8px;
  overflow-y: auto;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  padding: 14px 16px;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.mobile-menu a:hover, .mobile-menu a.active {
  color: var(--pink);
  border-color: var(--pink);
  background: rgba(255,78,139,0.08);
}
.mobile-search {
  display: flex;
  align-items: center;
  background: var(--card2);
  border: 1.5px solid var(--border);
  border-radius: 24px;
  padding: 10px 16px;
  gap: 8px;
  margin-bottom: 8px;
}
.mobile-search input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 15px;
}
.mobile-search input::placeholder { color: var(--text-muted); }

/* ---- 加载动画 ---- */
.skeleton {
  background: linear-gradient(90deg, var(--card) 25%, var(--card2) 50%, var(--card) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 8px;
}
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ---- 标签 ---- */
.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}
.tag-pink { background: rgba(255,78,139,0.15); color: var(--pink); border: 1px solid rgba(255,78,139,0.3); }
.tag-orange { background: rgba(255,112,67,0.15); color: var(--orange); border: 1px solid rgba(255,112,67,0.3); }
.tag-blue { background: rgba(0,161,214,0.15); color: #00A1D6; border: 1px solid rgba(0,161,214,0.3); }

/* ---- 通知提示 ---- */
.notice {
  background: rgba(255,78,139,0.08);
  border: 1px solid rgba(255,78,139,0.25);
  border-radius: var(--radius);
  padding: 16px 20px;
  font-size: 14px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 10px;
}
.notice .notice-icon { color: var(--pink); font-size: 18px; }

/* ---- 渐变文字 ---- */
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---- 图片懒加载占位 ---- */
img[loading="lazy"] { background: var(--card2); }

/* ---- 视频播放器模态框 ---- */
.video-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.video-modal.open { display: flex; }
.video-modal-inner {
  background: var(--card);
  border-radius: 16px;
  overflow: hidden;
  width: 100%;
  max-width: 800px;
  position: relative;
}
.video-modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  background: rgba(0,0,0,0.6);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  cursor: pointer;
  z-index: 10;
}
.video-modal video {
  width: 100%;
  aspect-ratio: 16/9;
  display: block;
  background: #000;
}
.video-modal-info { padding: 16px 20px; }
.video-modal-title { font-size: 16px; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.video-modal-meta { font-size: 13px; color: var(--text-muted); }

/* ---- 联系表单 ---- */
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 13px; font-weight: 600; color: var(--text-muted); }
.req { color: var(--pink); }
.form-group input,
.form-group select,
.form-group textarea {
  background: var(--card2);
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: border-color .25s;
  font-family: 'PingFang SC','Microsoft YaHei',sans-serif;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--pink);
  box-shadow: 0 0 0 3px rgba(255,78,139,0.10);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }
.form-group select option { background: var(--card2); color: var(--text); }
.form-group textarea { resize: vertical; min-height: 100px; }