/* =============================================
   每日大赛 - 主样式文件
   品牌色: 玫瑰粉 #FF2D78 | 星空蓝 #0A0E27 | 霓虹青 #00D4FF
   ============================================= */

/* === 基础重置 === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --brand-pink:    #FF2D78;
  --brand-cyan:    #00D4FF;
  --brand-dark:    #0A0E27;
  --brand-darker:  #060912;
  --brand-card:    #111530;
  --brand-border:  #1E2547;
  --brand-text:    #E8EAF6;
  --brand-muted:   #8892B0;
  --brand-gold:    #FFD700;
  --brand-purple:  #7B2FBE;
  --gradient-main: linear-gradient(135deg, #FF2D78 0%, #7B2FBE 50%, #00D4FF 100%);
  --gradient-card: linear-gradient(145deg, #111530 0%, #1a1f45 100%);
  --shadow-glow:   0 0 20px rgba(255,45,120,0.3);
  --shadow-card:   0 8px 32px rgba(0,0,0,0.4);
  --radius-sm:     8px;
  --radius-md:     16px;
  --radius-lg:     24px;
  --transition:    all 0.3s cubic-bezier(0.4,0,0.2,1);
}

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

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  background-color: var(--brand-darker);
  color: var(--brand-text);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: var(--brand-cyan); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--brand-pink); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

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

/* === 顶部公告栏 === */
.top-bar {
  background: var(--gradient-main);
  color: #fff;
  text-align: center;
  padding: 8px 20px;
  font-size: 13px;
  letter-spacing: 0.5px;
}
.top-bar a { color: #fff; font-weight: 600; }

/* === 导航栏 === */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10,14,39,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--brand-border);
  padding: 0 20px;
}
.navbar-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.navbar-brand img.site-logo {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid var(--brand-pink);
}
.navbar-brand .brand-name {
  font-size: 20px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}
.navbar-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.navbar-nav a {
  color: var(--brand-text);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  transition: var(--transition);
}
.navbar-nav a:hover,
.navbar-nav a.active {
  color: var(--brand-pink);
  background: rgba(255,45,120,0.1);
}
.navbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.btn-login {
  padding: 8px 20px;
  border: 1px solid var(--brand-pink);
  color: var(--brand-pink);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-login:hover {
  background: var(--brand-pink);
  color: #fff;
}
.btn-join {
  padding: 8px 20px;
  background: var(--gradient-main);
  color: #fff;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-join:hover { opacity: 0.85; transform: translateY(-1px); }

/* 汉堡菜单 */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--brand-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* === 搜索栏 === */
.search-bar-wrap {
  background: var(--brand-dark);
  border-bottom: 1px solid var(--brand-border);
  padding: 12px 20px;
}
.search-bar-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
}
.search-form {
  display: flex;
  flex: 1;
  max-width: 600px;
  background: var(--brand-card);
  border: 1px solid var(--brand-border);
  border-radius: 24px;
  overflow: hidden;
  transition: var(--transition);
}
.search-form:focus-within {
  border-color: var(--brand-pink);
  box-shadow: 0 0 0 3px rgba(255,45,120,0.15);
}
.search-form input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  padding: 10px 20px;
  color: var(--brand-text);
  font-size: 14px;
}
.search-form input::placeholder { color: var(--brand-muted); }
.search-form button {
  background: var(--brand-pink);
  border: none;
  color: #fff;
  padding: 10px 20px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}
.search-form button:hover { background: #e0245e; }
.search-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.search-tag {
  padding: 4px 12px;
  background: rgba(255,45,120,0.1);
  border: 1px solid rgba(255,45,120,0.3);
  border-radius: 12px;
  font-size: 12px;
  color: var(--brand-pink);
  cursor: pointer;
  transition: var(--transition);
}
.search-tag:hover { background: rgba(255,45,120,0.2); }

/* === 面包屑 === */
.breadcrumb {
  max-width: 1280px;
  margin: 0 auto;
  padding: 12px 20px;
  font-size: 13px;
  color: var(--brand-muted);
}
.breadcrumb a { color: var(--brand-muted); }
.breadcrumb a:hover { color: var(--brand-pink); }
.breadcrumb span { margin: 0 6px; }

/* === 容器 === */
.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }
.section { padding: 60px 0; }
.section-sm { padding: 40px 0; }

/* === 区块标题 === */
.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-label {
  display: inline-block;
  padding: 4px 16px;
  background: rgba(255,45,120,0.1);
  border: 1px solid rgba(255,45,120,0.3);
  border-radius: 12px;
  font-size: 12px;
  color: var(--brand-pink);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
  line-height: 1.3;
}
.section-title .highlight {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-desc {
  font-size: 15px;
  color: var(--brand-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* === Hero Banner === */
.hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--brand-dark);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/banner_hero.jpg');
  background-size: cover;
  background-position: center;
  filter: brightness(0.35);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(10,14,39,0.9) 0%, rgba(10,14,39,0.4) 60%, transparent 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 20px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: rgba(255,45,120,0.15);
  border: 1px solid var(--brand-pink);
  border-radius: 20px;
  font-size: 12px;
  color: var(--brand-pink);
  margin-bottom: 20px;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255,45,120,0.4); }
  50% { box-shadow: 0 0 0 8px rgba(255,45,120,0); }
}
.hero h1 {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 900;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 16px;
}
.hero h1 em {
  font-style: normal;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 16px;
  color: rgba(232,234,246,0.8);
  max-width: 520px;
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--gradient-main);
  color: #fff;
  border-radius: 28px;
  font-size: 15px;
  font-weight: 700;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-glow); color: #fff; }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 28px;
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-secondary:hover { border-color: var(--brand-cyan); color: var(--brand-cyan); }
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  flex-wrap: wrap;
}
.hero-stat-item { text-align: center; }
.hero-stat-num {
  font-size: 28px;
  font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-stat-label { font-size: 12px; color: var(--brand-muted); margin-top: 4px; }

/* === 视频卡片 === */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.video-card {
  background: var(--brand-card);
  border: 1px solid var(--brand-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-4px);
  border-color: var(--brand-pink);
  box-shadow: var(--shadow-glow);
}
.video-thumb {
  position: relative;
  aspect-ratio: 3/4;
  overflow: hidden;
  background: var(--brand-dark);
}
.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); }
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.4);
  opacity: 0;
  transition: var(--transition);
}
.video-card:hover .video-play-btn { opacity: 1; }
.play-icon {
  width: 56px;
  height: 56px;
  background: rgba(255,45,120,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
  transform: scale(0.8);
  transition: var(--transition);
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon::after {
  content: '';
  border-left: 20px solid #fff;
  border-top: 12px solid transparent;
  border-bottom: 12px solid transparent;
  margin-left: 4px;
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
}
.video-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--brand-pink);
  color: #fff;
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}
.video-info { padding: 14px; }
.video-title {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 8px;
  line-height: 1.4;
  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(--brand-muted);
}
.video-stats { display: flex; gap: 12px; }
.video-stat { display: flex; align-items: center; gap: 4px; }

/* === 分类标签栏 === */
.category-tabs {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 4px;
  margin-bottom: 28px;
  scrollbar-width: none;
}
.category-tabs::-webkit-scrollbar { display: none; }
.cat-tab {
  flex-shrink: 0;
  padding: 8px 20px;
  background: var(--brand-card);
  border: 1px solid var(--brand-border);
  border-radius: 20px;
  font-size: 13px;
  color: var(--brand-muted);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.cat-tab:hover, .cat-tab.active {
  background: rgba(255,45,120,0.15);
  border-color: var(--brand-pink);
  color: var(--brand-pink);
}

/* === 功能模块卡片 === */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.feature-card {
  background: var(--gradient-card);
  border: 1px solid var(--brand-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-main);
  opacity: 0;
  transition: var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--brand-pink);
  box-shadow: var(--shadow-card);
}
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 56px;
  height: 56px;
  background: rgba(255,45,120,0.1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 20px;
}
.feature-title {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.feature-desc {
  font-size: 14px;
  color: var(--brand-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(--gradient-card);
  border: 1px solid var(--brand-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-align: center;
  transition: var(--transition);
}
.expert-card:hover {
  transform: translateY(-4px);
  border-color: var(--brand-cyan);
  box-shadow: 0 0 20px rgba(0,212,255,0.2);
}
.expert-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  margin: 0 auto 16px;
  border: 3px solid var(--brand-pink);
  overflow: hidden;
  object-fit: cover;
}
.expert-name {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}
.expert-role {
  font-size: 13px;
  color: var(--brand-pink);
  margin-bottom: 12px;
}
.expert-desc {
  font-size: 13px;
  color: var(--brand-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}
.expert-tags { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; margin-bottom: 16px; }
.expert-tag {
  padding: 3px 10px;
  background: rgba(0,212,255,0.1);
  border: 1px solid rgba(0,212,255,0.3);
  border-radius: 10px;
  font-size: 11px;
  color: var(--brand-cyan);
}
.expert-actions { display: flex; gap: 8px; justify-content: center; }
.btn-sm {
  padding: 6px 16px;
  border-radius: 16px;
  font-size: 12px;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}
.btn-outline-pink {
  background: transparent;
  border: 1px solid var(--brand-pink);
  color: var(--brand-pink);
}
.btn-outline-pink:hover { background: var(--brand-pink); color: #fff; }
.btn-outline-cyan {
  background: transparent;
  border: 1px solid var(--brand-cyan);
  color: var(--brand-cyan);
}
.btn-outline-cyan:hover { background: var(--brand-cyan); color: var(--brand-dark); }

/* === 评价卡片 === */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--gradient-card);
  border: 1px solid var(--brand-border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition);
}
.review-card:hover { border-color: var(--brand-pink); }
.review-stars { color: var(--brand-gold); font-size: 16px; margin-bottom: 12px; }
.review-text {
  font-size: 14px;
  color: var(--brand-text);
  line-height: 1.7;
  margin-bottom: 16px;
}
.review-author { display: flex; align-items: center; gap: 12px; }
.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-main);
  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: 600; color: #fff; }
.review-date { font-size: 12px; color: var(--brand-muted); }

/* === FAQ === */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--brand-card);
  border: 1px solid var(--brand-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--brand-pink); }
.faq-question {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  gap: 16px;
}
.faq-question .faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(255,45,120,0.1);
  border: 1px solid var(--brand-pink);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--brand-pink);
  flex-shrink: 0;
  transition: var(--transition);
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}
.faq-answer p {
  font-size: 14px;
  color: var(--brand-muted);
  line-height: 1.8;
}

/* === 合作品牌Logo墙 === */
.partner-logos {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}
.partner-logo {
  padding: 16px 28px;
  background: var(--brand-card);
  border: 1px solid var(--brand-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 700;
  color: var(--brand-muted);
  transition: var(--transition);
  cursor: default;
}
.partner-logo:hover { border-color: var(--brand-pink); color: var(--brand-pink); }

/* === 联系区域 === */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.contact-info-card {
  background: var(--gradient-card);
  border: 1px solid var(--brand-border);
  border-radius: var(--radius-lg);
  padding: 36px;
}
.contact-info-title {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 24px;
}
.contact-item {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
  align-items: flex-start;
}
.contact-icon {
  width: 44px;
  height: 44px;
  background: rgba(255,45,120,0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.contact-label { font-size: 12px; color: var(--brand-muted); margin-bottom: 4px; }
.contact-value { font-size: 14px; color: var(--brand-text); font-weight: 500; }
.qr-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.qr-item { text-align: center; }
.qr-item img {
  width: 140px;
  height: 140px;
  border-radius: var(--radius-md);
  border: 2px solid var(--brand-border);
  margin: 0 auto 8px;
}
.qr-label { font-size: 13px; color: var(--brand-muted); }

/* === 分享按钮 === */
.share-section { text-align: center; padding: 40px 0; }
.share-title { font-size: 16px; color: var(--brand-muted); margin-bottom: 20px; }
.share-buttons { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  color: #fff;
}
.share-btn:hover { transform: translateY(-2px); opacity: 0.9; }
.share-wechat { background: #07C160; }
.share-weibo { background: #E6162D; }
.share-douyin { background: #010101; border: 1px solid #333; }
.share-bilibili { background: #00A1D6; }

/* === 页脚 === */
.footer {
  background: var(--brand-darker);
  border-top: 1px solid var(--brand-border);
  padding: 60px 20px 24px;
}
.footer-grid {
  max-width: 1280px;
  margin: 0 auto;
  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 { width: 36px; height: 36px; border-radius: 50%; }
.footer-brand .brand-logo span {
  font-size: 18px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer-desc { font-size: 13px; color: var(--brand-muted); line-height: 1.8; margin-bottom: 20px; }
.footer-social { display: flex; gap: 10px; }
.social-icon {
  width: 36px;
  height: 36px;
  background: var(--brand-card);
  border: 1px solid var(--brand-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--brand-muted);
  transition: var(--transition);
}
.social-icon:hover { border-color: var(--brand-pink); color: var(--brand-pink); background: rgba(255,45,120,0.1); }
.footer-col-title {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
}
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 13px; color: var(--brand-muted); transition: var(--transition); }
.footer-links a:hover { color: var(--brand-pink); padding-left: 4px; }
.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid var(--brand-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-copyright { font-size: 13px; color: var(--brand-muted); }
.footer-copyright a { color: var(--brand-pink); }
.footer-update { font-size: 12px; color: var(--brand-muted); }
.footer-icp { font-size: 12px; color: var(--brand-muted); }

/* === 统计数字条 === */
.stats-bar {
  background: var(--gradient-main);
  padding: 32px 20px;
}
.stats-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}
.stat-item .num {
  font-size: 32px;
  font-weight: 900;
  color: #fff;
}
.stat-item .label { font-size: 13px; color: rgba(255,255,255,0.8); margin-top: 4px; }

/* === 加入社区引导 === */
.join-section {
  background: var(--brand-dark);
  border: 1px solid var(--brand-border);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.join-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at center, rgba(255,45,120,0.08) 0%, transparent 60%);
  pointer-events: none;
}
.join-title { font-size: 28px; font-weight: 800; color: #fff; margin-bottom: 12px; }
.join-desc { font-size: 15px; color: var(--brand-muted); margin-bottom: 32px; }
.join-steps {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.join-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  max-width: 160px;
}
.step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 900;
  color: #fff;
}
.step-text { font-size: 13px; color: var(--brand-muted); text-align: center; line-height: 1.5; }

/* === 通用工具类 === */
.text-center { text-align: center; }
.text-pink { color: var(--brand-pink); }
.text-cyan { color: var(--brand-cyan); }
.text-muted { color: var(--brand-muted); }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-8 { gap: 8px; }
.gap-16 { gap: 16px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

/* === 内页头部 === */
.page-hero {
  background: var(--brand-dark);
  border-bottom: 1px solid var(--brand-border);
  padding: 48px 20px;
  text-align: center;
}
.page-hero h1 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}
.page-hero p { font-size: 15px; color: var(--brand-muted); max-width: 600px; margin: 0 auto; }

/* === 响应式 === */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .navbar-nav { display: none; }
  .navbar-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10,14,39,0.98);
    padding: 16px;
    border-bottom: 1px solid var(--brand-border);
    gap: 4px;
  }
  .menu-toggle { display: flex; }
  .navbar-inner { position: relative; }
  .navbar-actions .btn-login { display: none; }
  .hero { min-height: 420px; }
  .hero-stats { gap: 24px; }
  .video-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .feature-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .review-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .join-steps { gap: 16px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .qr-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 28px; }
  .section { padding: 40px 0; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn-primary,
  .hero-actions .btn-secondary { width: 100%; justify-content: center; }
}

/* === 懒加载占位 === */
.lazy-img {
  background: var(--brand-card);
  min-height: 200px;
}

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

/* === 直播标签 === */
.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  background: #E6162D;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.5px;
}
.live-dot {
  width: 6px;
  height: 6px;
  background: #fff;
  border-radius: 50%;
  animation: blink 1s infinite;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* === 页面过渡 === */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}


/* === 新增类：专家卡片扩展（EEAT深化） === */
.expert-awards {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 12px;
}
.award-tag {
  font-size: 11px;
  color: var(--brand-gold);
  background: rgba(255,215,0,0.08);
  border: 1px solid rgba(255,215,0,0.2);
  border-radius: 4px;
  padding: 3px 8px;
  text-align: left;
  line-height: 1.5;
}
.expert-social { margin-bottom: 10px; }
.social-link {
  display: inline-block;
  font-size: 11px;
  color: var(--brand-cyan);
  border: 1px solid var(--brand-cyan);
  border-radius: 4px;
  padding: 2px 10px;
  transition: var(--transition);
}
.social-link:hover { background: var(--brand-cyan); color: var(--brand-dark); }
.expert-avatar-text {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  border: 3px solid var(--brand-pink);
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 800;
  color: #fff;
}
.expert-avatar-pink { background: linear-gradient(135deg, var(--brand-pink), var(--brand-purple)); }
.expert-avatar-cyan { background: linear-gradient(135deg, var(--brand-cyan), #0077aa); }

/* === 新增类：AI赋能区 === */
.ai-feature-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.ai-banner-img {
  width: 100%;
  border-radius: var(--radius-lg);
  border: 1px solid var(--brand-border);
  box-shadow: var(--shadow-card);
}
.ai-tool-title {
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 24px;
}
.ai-features-list { display: flex; flex-direction: column; gap: 20px; }
.ai-feature-item { display: flex; gap: 16px; align-items: flex-start; }
.ai-icon-box {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}
.ai-icon-pink { background: rgba(255,45,120,0.15); }
.ai-icon-cyan { background: rgba(0,212,255,0.15); }
.ai-icon-purple { background: rgba(123,47,190,0.15); }
.ai-feat-name { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 4px; }
.ai-feat-desc { font-size: 13px; color: var(--brand-muted); line-height: 1.6; }

/* === 新增类：面包屑修正 === */
.breadcrumb {
  background: var(--brand-dark);
  border-bottom: 1px solid var(--brand-border);
  padding: 10px 20px;
}
.breadcrumb-sep { margin: 0 6px; color: var(--brand-muted); }

/* === 新增类：联系我们扩展 === */
.contact-extra-info {
  font-size: 13px;
  color: var(--brand-muted);
  line-height: 2;
  padding-top: 12px;
  border-top: 1px solid var(--brand-border);
}

/* === 新增类：footer二维码区域 === */
.footer-qr-wrap {
  max-width: 1280px;
  margin: 0 auto 24px;
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
  padding-top: 24px;
  border-top: 1px solid var(--brand-border);
}

/* === 新增类：搜索提示toast === */
.search-result-toast {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(-10px);
  background: var(--brand-card);
  border: 1px solid var(--brand-pink);
  border-radius: var(--radius-sm);
  padding: 12px 24px;
  font-size: 14px;
  color: var(--brand-text);
  z-index: 9999;
  opacity: 0;
  transition: all 0.3s ease;
  pointer-events: none;
  white-space: nowrap;
  max-width: 90vw;
  text-align: center;
}
.search-result-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* === 新增类：live-dot === */
.live-dot {
  width: 8px;
  height: 8px;
  background: var(--brand-pink);
  border-radius: 50%;
  display: inline-block;
  animation: blink 1.5s infinite;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* === 新增类：page-hero-desc === */
.page-hero-desc { font-size: 15px; color: var(--brand-muted); max-width: 600px; margin: 0 auto; }

/* === 新增类：hero-content h1 em === */
.hero-content h1 em {
  font-style: normal;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* === 响应式补充 === */
@media (max-width: 1024px) {
  .ai-feature-wrap { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .ai-feature-wrap { grid-template-columns: 1fr; }
  .footer-qr-wrap { flex-direction: column; align-items: center; }
}