/* ============================================================
   糖心vlog - 全局样式
   官网：qvLdp.cn
   ============================================================ */

/* ---- CSS变量 ---- */
:root {
  --purple-main: #6B21A8;
  --purple-dark: #3B0764;
  --purple-light: #A855F7;
  --pink-main: #EC4899;
  --pink-light: #F9A8D4;
  --gold: #F59E0B;
  --bg-main: #0A0A0F;
  --bg-card: #111118;
  --bg-card2: #16161F;
  --border: rgba(107,33,168,0.25);
  --border-hover: rgba(236,72,153,0.5);
  --text-main: #F1F0F8;
  --text-muted: #8B8BA0;
  --text-sub: #C4C2D8;
  --shadow-card: 0 4px 24px rgba(107,33,168,0.15);
  --shadow-hover: 0 8px 40px rgba(236,72,153,0.25);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.25s ease;
}

/* ---- 重置 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg-main);
  color: var(--text-main);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--pink-main); }
img { max-width: 100%; height: auto; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul, ol { list-style: none; }
.hidden { display: none !important; }
.text-center { text-align: center; }
.mt-30 { margin-top: 30px; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ---- 顶部公告栏 ---- */
.top-bar {
  background: linear-gradient(90deg, var(--purple-dark), #1E0A3C, var(--purple-dark));
  color: var(--pink-light);
  text-align: center;
  font-size: 13px;
  padding: 8px 20px;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---- 头部导航 ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10,10,15,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 20px;
}
.logo-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}
.logo-icon {
  border-radius: 8px;
  border: 2px solid var(--purple-main);
  object-fit: cover;
}
.logo-text {
  font-size: 20px;
  font-weight: 900;
  background: linear-gradient(135deg, #A855F7, #EC4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 1px;
  white-space: nowrap;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
  flex-wrap: wrap;
}
.main-nav a {
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-sub);
  transition: all var(--transition);
  white-space: nowrap;
}
.main-nav a:hover,
.main-nav a.active {
  background: rgba(107,33,168,0.2);
  color: var(--pink-light);
}
.header-search {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 25px;
  overflow: hidden;
  flex-shrink: 0;
}
.header-search input {
  background: none;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 13px;
  padding: 8px 14px;
  width: 160px;
}
.header-search input::placeholder { color: var(--text-muted); }
.header-search button {
  background: linear-gradient(135deg, var(--purple-main), var(--pink-main));
  border: none;
  color: #fff;
  padding: 8px 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
  flex-shrink: 0;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-sub);
  border-radius: 2px;
  transition: all var(--transition);
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ---- Hero Banner ---- */
.hero-banner {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: url('/assets/images/banner_bg.jpg') center/cover no-repeat;
  z-index: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,10,15,0.92) 0%, rgba(59,7,100,0.75) 50%, rgba(10,10,15,0.88) 100%);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 20px 60px;
  width: 100%;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(236,72,153,0.15);
  border: 1px solid rgba(236,72,153,0.4);
  color: var(--pink-light);
  padding: 6px 16px;
  border-radius: 25px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: 1px;
}
.hero-title {
  font-size: clamp(36px, 6vw, 72px);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 24px;
  color: #fff;
}
.hero-title span {
  background: linear-gradient(135deg, #A855F7, #EC4899, #F59E0B);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 16px;
  color: var(--text-sub);
  line-height: 1.9;
  margin-bottom: 36px;
  max-width: 600px;
}
.hero-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.hero-stats {
  display: flex;
  gap: 30px;
  flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-num {
  display: block;
  font-size: 28px;
  font-weight: 900;
  background: linear-gradient(135deg, var(--purple-light), var(--pink-main));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
  display: block;
}

/* ---- 按钮 ---- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--purple-main), var(--pink-main));
  color: #fff;
  padding: 12px 28px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(236,72,153,0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(236,72,153,0.5);
  color: #fff;
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text-sub);
  padding: 12px 28px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-outline:hover {
  border-color: var(--pink-main);
  color: var(--pink-light);
  background: rgba(236,72,153,0.08);
}
.btn-sm {
  padding: 7px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}
.btn-sm-primary {
  background: linear-gradient(135deg, var(--purple-main), var(--pink-main));
  color: #fff;
  border: none;
}
.btn-sm-primary:hover { opacity: 0.85; color: #fff; }
.btn-sm-outline {
  background: transparent;
  color: var(--text-sub);
  border: 1px solid var(--border);
}
.btn-sm-outline:hover { border-color: var(--pink-main); color: var(--pink-light); }

/* ---- 搜索区 ---- */
.search-section {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 28px 0;
}
.search-bar-wrap {
  display: flex;
  align-items: center;
  background: var(--bg-main);
  border: 1.5px solid var(--border);
  border-radius: 40px;
  overflow: hidden;
  max-width: 680px;
  margin: 0 auto 16px;
  transition: border-color var(--transition);
}
.search-bar-wrap:focus-within { border-color: var(--pink-main); }
.search-bar-wrap input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 15px;
  padding: 14px 20px;
}
.search-bar-wrap input::placeholder { color: var(--text-muted); }
.search-btn {
  background: linear-gradient(135deg, var(--purple-main), var(--pink-main));
  color: #fff;
  border: none;
  padding: 14px 28px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity var(--transition);
}
.search-btn:hover { opacity: 0.85; }
.search-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  font-size: 13px;
  color: var(--text-muted);
}
.search-tag {
  background: rgba(107,33,168,0.15);
  border: 1px solid var(--border);
  color: var(--purple-light);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  cursor: pointer;
  transition: all var(--transition);
}
.search-tag:hover {
  background: rgba(107,33,168,0.3);
  border-color: var(--purple-light);
  color: #fff;
}

/* ---- 通用Section ---- */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-card); }
.section-header { text-align: center; margin-bottom: 50px; }
.section-tag {
  display: inline-block;
  background: rgba(107,33,168,0.2);
  border: 1px solid var(--border);
  color: var(--purple-light);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(24px, 4vw, 38px);
  font-weight: 900;
  color: #fff;
  margin-bottom: 14px;
  line-height: 1.3;
}
.section-title span {
  background: linear-gradient(135deg, var(--purple-light), var(--pink-main));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-desc {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto 20px;
  line-height: 1.8;
}
.section-line {
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--purple-main), var(--pink-main));
  border-radius: 2px;
  margin: 0 auto;
}
.text-gradient {
  background: linear-gradient(135deg, var(--purple-light), var(--pink-main));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---- 视频卡片 ---- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.video-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
}
.video-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.video-card:hover .play-overlay { opacity: 1; }
.video-card:hover .play-btn { transform: scale(1.1); }
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--bg-card2);
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.05); }
.play-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}
.play-btn {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--purple-main), var(--pink-main));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition);
  box-shadow: 0 4px 20px rgba(236,72,153,0.5);
}
.play-btn svg { width: 22px; height: 22px; fill: #fff; margin-left: 3px; }
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.8);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  background: linear-gradient(135deg, var(--purple-main), var(--pink-main));
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}
.video-info { padding: 14px 16px 16px; }
.video-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 10px;
}
.video-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-muted);
}
.video-stats { display: flex; gap: 10px; }

/* ---- Tab切换 ---- */
.tab-group { width: 100%; }
.tab-nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 16px;
}
.tab-btn {
  padding: 8px 20px;
  border-radius: 25px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all var(--transition);
}
.tab-btn:hover { color: var(--pink-light); border-color: var(--pink-main); }
.tab-btn.active {
  background: linear-gradient(135deg, var(--purple-main), var(--pink-main));
  color: #fff;
  border-color: transparent;
}
.tab-panel { display: block; }
.tab-panel.hidden { display: none; }

/* ---- 功能特性卡片 ---- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  transition: all var(--transition);
}
.feature-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}
.feature-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, rgba(107,33,168,0.2), rgba(236,72,153,0.2));
  border: 1px solid var(--border);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin: 0 auto 16px;
}
.feature-title {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.feature-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ---- 专家卡片 ---- */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.expert-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}
.expert-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}
.expert-photo {
  width: 100%;
  aspect-ratio: 1/1;
  object-fit: cover;
}
.expert-info { padding: 20px; }
.expert-name {
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 4px;
}
.expert-role {
  font-size: 12px;
  color: var(--pink-main);
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: 0.5px;
}
.expert-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 12px;
}
.expert-awards {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}
.award-badge {
  background: rgba(245,158,11,0.12);
  border: 1px solid rgba(245,158,11,0.3);
  color: var(--gold);
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
}
.expert-btns { display: flex; gap: 8px; flex-wrap: wrap; }

/* ---- 合作品牌 ---- */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}
.partner-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 16px;
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  transition: all var(--transition);
}
.partner-item:hover {
  border-color: var(--border-hover);
  color: var(--pink-light);
  background: rgba(107,33,168,0.1);
}

/* ---- 联系卡片 ---- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}
.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  transition: all var(--transition);
}
.contact-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}
.contact-icon { font-size: 32px; margin-bottom: 12px; }
.contact-title { font-size: 13px; color: var(--text-muted); margin-bottom: 6px; }
.contact-value { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 6px; }
.contact-desc { font-size: 12px; color: var(--text-muted); }

/* ---- 评价卡片 ---- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all var(--transition);
}
.review-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}
.review-stars { color: var(--gold); font-size: 16px; margin-bottom: 12px; letter-spacing: 2px; }
.review-text {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.8;
  margin-bottom: 16px;
}
.review-user { display: flex; align-items: center; gap: 12px; }
.review-avatar {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--purple-main), var(--pink-main));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.review-name { font-size: 14px; font-weight: 700; color: #fff; }
.review-date { font-size: 11px; color: var(--text-muted); margin-top: 2px; }

/* ---- FAQ ---- */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition);
}
.faq-item.open { border-color: var(--purple-light); }
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 22px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  gap: 16px;
  transition: color var(--transition);
}
.faq-question:hover { color: var(--pink-light); }
.faq-icon {
  font-size: 20px;
  font-weight: 300;
  color: var(--purple-light);
  flex-shrink: 0;
  transition: transform var(--transition);
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 22px;
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 22px 18px;
}
.faq-answer p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ---- 分享按钮 ---- */
.share-bar { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }
.share-btn {
  padding: 10px 24px;
  border-radius: 25px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: 1.5px solid var(--border);
  color: var(--text-sub);
  background: var(--bg-card);
}
.share-btn:hover { border-color: var(--pink-main); color: var(--pink-light); background: rgba(236,72,153,0.08); }
.share-wechat:hover { border-color: #07C160; color: #07C160; background: rgba(7,193,96,0.08); }
.share-weibo:hover { border-color: #E6162D; color: #E6162D; background: rgba(230,22,45,0.08); }
.share-bilibili:hover { border-color: #00A1D6; color: #00A1D6; background: rgba(0,161,214,0.08); }

/* ---- 通知栏 ---- */
.notice-bar {
  background: rgba(107,33,168,0.12);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 20px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
  text-align: center;
}
.notice-bar strong { color: var(--pink-light); }

/* ---- 分页 ---- */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
}
.page-btn {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all var(--transition);
}
.page-btn:hover,
.page-btn.active {
  background: linear-gradient(135deg, var(--purple-main), var(--pink-main));
  color: #fff;
  border-color: transparent;
}

/* ---- 内页Banner ---- */
.inner-banner {
  background: linear-gradient(135deg, var(--purple-dark) 0%, #1A0A2E 50%, var(--bg-main) 100%);
  border-bottom: 1px solid var(--border);
  padding: 60px 0 50px;
}
.breadcrumb {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.breadcrumb a { color: var(--purple-light); }
.breadcrumb a:hover { color: var(--pink-main); }
.inner-banner-title {
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 900;
  color: #fff;
  margin-bottom: 14px;
}
.inner-banner-desc {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 600px;
  line-height: 1.8;
}

/* ---- 页脚 ---- */
.site-footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
}
.footer-brand {}
.footer-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
  margin-top: 12px;
}
.footer-qrcodes {
  display: flex;
  gap: 16px;
}
.qr-item { text-align: center; }
.qr-item img {
  width: 80px;
  height: 80px;
  border-radius: 8px;
  border: 1px solid var(--border);
  object-fit: cover;
}
.qr-label { font-size: 11px; color: var(--text-muted); margin-top: 6px; }
.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-links a {
  font-size: 13px;
  color: var(--text-muted);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--pink-light); }
.footer-social {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.social-icon {
  width: 34px;
  height: 34px;
  background: var(--bg-main);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}
.social-icon:hover {
  background: linear-gradient(135deg, var(--purple-main), var(--pink-main));
  border-color: transparent;
  color: #fff;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-copyright {
  font-size: 13px;
  color: var(--text-muted);
}
.footer-copyright a { color: var(--purple-light); }
.footer-copyright a:hover { color: var(--pink-main); }
.footer-update {
  font-size: 12px;
  color: var(--text-muted);
  background: rgba(107,33,168,0.1);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 20px;
}

/* ---- 视频弹窗 ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  backdrop-filter: blur(6px);
}
.modal-overlay.open { opacity: 1; pointer-events: all; }
.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: min(600px, 92vw);
  overflow: hidden;
  transform: scale(0.9);
  transition: transform 0.3s ease;
}
.modal-overlay.open .modal-content { transform: scale(1); }
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.modal-title { font-size: 15px; font-weight: 700; color: #fff; }
.modal-close {
  width: 32px;
  height: 32px;
  background: rgba(255,255,255,0.08);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
}
.modal-close:hover { background: rgba(236,72,153,0.2); color: var(--pink-main); }
.modal-video {
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--purple-dark), #1A0A2E);
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal-body { padding: 16px 20px; }

/* ---- 回到顶部 ---- */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--purple-main), var(--pink-main));
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: 18px;
  cursor: pointer;
  z-index: 999;
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition);
  box-shadow: 0 4px 16px rgba(236,72,153,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
}
.back-to-top.visible { opacity: 1; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(236,72,153,0.6); }

/* ---- 社区布局响应式 ---- */
@media (max-width: 768px) {
  .community-layout { grid-template-columns: 1fr !important; }
  .about-layout { grid-template-columns: 1fr !important; }
  .lol-featured { grid-template-columns: 1fr !important; }
  .join-steps { grid-template-columns: 1fr !important; }
  .stats-grid { grid-template-columns: repeat(2,1fr) !important; }
}

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .partner-grid { grid-template-columns: repeat(3,1fr); }
}
@media (max-width: 768px) {
  .hamburger { display: flex; }
  .main-nav {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(10,10,15,0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid var(--border);
    gap: 4px;
    z-index: 999;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 16px; font-size: 15px; }
  .header-search { display: none; }
  .hero-banner { min-height: 80vh; }
  .hero-content { padding: 60px 20px 40px; }
  .hero-btns { flex-direction: column; }
  .hero-btns .btn-primary,
  .hero-btns .btn-outline { width: fit-content; }
  .section { padding: 50px 0; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; padding: 20px; }
  .partner-grid { grid-template-columns: repeat(2,1fr); }
  .video-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: repeat(2,1fr); }
  .tab-nav { gap: 6px; }
  .tab-btn { padding: 6px 14px; font-size: 13px; }
}
@media (max-width: 480px) {
  .contact-grid { grid-template-columns: 1fr; }
  .partner-grid { grid-template-columns: repeat(2,1fr); }
  .hero-stats { gap: 16px; }
  .stat-num { font-size: 22px; }
}