/* =============================================
   糖心vlog - 主样式文件
   Brand: 糖心vlog | Domain: wpovsp.cn
   ============================================= */

/* ---- CSS 变量 ---- */
:root {
  --primary: #FF4B8B;
  --primary-dark: #E03070;
  --secondary: #FF6B35;
  --accent: #A855F7;
  --accent2: #06B6D4;
  --bg: #0D0D1A;
  --bg-card: #14142A;
  --bg-card2: #0F0F22;
  --border: rgba(255,75,139,0.15);
  --text: #F0F0FF;
  --text-secondary: #C8C8E8;
  --text-muted: #7878A8;
  --gradient-main: linear-gradient(135deg, #FF4B8B 0%, #FF6B35 50%, #A855F7 100%);
  --gradient-card: linear-gradient(145deg, #14142A, #1A1A35);
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-hover: 0 16px 48px rgba(255,75,139,0.3);
  --transition: 0.3s ease;
  --header-h: 72px;
}

/* ---- 重置 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', '微软雅黑', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ---- 进度条 ---- */
.loading-bar {
  position: fixed; top: 0; left: 0; height: 3px; width: 0;
  background: var(--gradient-main); z-index: 9999;
  transition: width 0.4s ease, opacity 0.3s ease;
}

/* ---- 顶部公告栏 ---- */
.top-bar {
  background: var(--gradient-main);
  color: #fff;
  text-align: center;
  font-size: 13px;
  padding: 8px 16px;
  font-weight: 500;
}
.top-bar a { color: #fff; font-weight: 700; text-decoration: underline; margin-left: 4px; }

/* ---- 头部 ---- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(13,13,26,0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
}
.header-inner {
  max-width: 1280px; margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex; align-items: center; gap: 32px;
}
.site-logo {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; flex-shrink: 0;
}
.logo-img {
  width: 44px; height: 44px;
  border-radius: 10px;
  object-fit: cover;
  border: 2px solid var(--primary);
}
.logo-text {
  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;
}
.main-nav {
  display: flex; align-items: center; gap: 4px;
  flex: 1;
}
.main-nav a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 14px; font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--primary);
  background: rgba(255,75,139,0.1);
}
.header-actions {
  display: flex; align-items: center; gap: 12px; flex-shrink: 0;
}
.btn-login {
  background: var(--gradient-main);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: 24px;
  font-size: 14px; font-weight: 600;
  white-space: nowrap;
  transition: opacity var(--transition);
}
.btn-login:hover { opacity: 0.85; }
.menu-toggle {
  display: none;
  flex-direction: column; gap: 5px;
  padding: 8px; cursor: pointer;
}
.menu-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all var(--transition);
}
.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ---- 搜索栏 ---- */
.search-bar-wrap {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
}
.search-bar-inner {
  max-width: 1280px; margin: 0 auto; padding: 0 24px;
}
.search-form {
  display: flex; gap: 0;
  max-width: 600px;
  border: 1px solid var(--border);
  border-radius: 28px;
  overflow: hidden;
  background: var(--bg-card2);
  transition: border-color var(--transition);
}
.search-form:focus-within { border-color: var(--primary); }
.search-form input {
  flex: 1; padding: 10px 20px;
  background: none; border: none; outline: none;
  color: var(--text); font-size: 14px;
}
.search-form button {
  background: var(--gradient-main);
  color: #fff; padding: 10px 24px;
  font-size: 14px; font-weight: 600;
  white-space: nowrap;
  transition: opacity var(--transition);
}
.search-form button:hover { opacity: 0.85; }
.search-tags {
  display: flex; align-items: center; gap: 8px;
  margin-top: 10px; flex-wrap: wrap;
  font-size: 13px; color: var(--text-muted);
}
.search-tags a {
  padding: 3px 10px;
  background: rgba(255,75,139,0.08);
  border: 1px solid rgba(255,75,139,0.2);
  border-radius: 12px; color: var(--text-secondary);
  font-size: 12px;
  transition: all var(--transition);
}
.search-tags a:hover { background: rgba(255,75,139,0.2); color: var(--primary); }

/* ---- 面包屑 ---- */
.breadcrumb {
  max-width: 1280px; margin: 0 auto;
  padding: 14px 24px;
  font-size: 13px; color: var(--text-muted);
  display: flex; align-items: center; gap: 6px;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--border); }
.breadcrumb .current { color: var(--text-secondary); }

/* ---- 容器 ---- */
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
.section { padding: 72px 0; }
.section-sm { padding: 32px 0; }

/* ---- 分区标题 ---- */
.section-title {
  text-align: center; margin-bottom: 48px;
}
.section-title h2 {
  font-size: 32px; font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}
.section-title p { font-size: 16px; color: var(--text-secondary); max-width: 600px; margin: 0 auto; }
.section-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 32px; flex-wrap: wrap; gap: 12px;
}
.section-header h2 {
  font-size: 24px; font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.view-more {
  font-size: 14px; color: var(--primary); font-weight: 600;
  padding: 6px 16px; border: 1px solid var(--primary);
  border-radius: 20px; transition: all var(--transition);
}
.view-more:hover { background: var(--primary); color: #fff; }

/* ---- 按钮 ---- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: 28px;
  font-size: 15px; font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
}
.btn-primary {
  background: var(--gradient-main); color: #fff;
  box-shadow: 0 8px 24px rgba(255,75,139,0.4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(255,75,139,0.5); color: #fff; }
.btn-ghost {
  background: transparent; color: var(--text);
  border: 1px solid rgba(255,255,255,0.2);
}
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn-outline {
  background: transparent; color: var(--primary);
  border: 1px solid var(--primary);
  padding: 10px 32px;
}
.btn-outline:hover { background: var(--primary); color: #fff; }

/* ---- Hero ---- */
.hero {
  position: relative; min-height: 88vh;
  display: flex; align-items: center;
  overflow: hidden; padding: 80px 24px;
}
.hero-bg {
  position: absolute; inset: 0;
  background: url('/assets/images/hero_banner.jpg') center/cover no-repeat;
  filter: brightness(0.25) saturate(1.5);
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(13,13,26,0.9) 0%, rgba(255,75,139,0.15) 50%, rgba(13,13,26,0.9) 100%);
}
.hero-content {
  position: relative; z-index: 2;
  max-width: 1280px; margin: 0 auto; width: 100%;
  max-width: 720px;
}
.hero-badge {
  display: inline-flex; align-items: center;
  background: rgba(255,75,139,0.15);
  border: 1px solid rgba(255,75,139,0.4);
  color: var(--primary); padding: 6px 16px;
  border-radius: 20px; font-size: 13px; font-weight: 600;
  margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 900; line-height: 1.2;
  margin-bottom: 20px; color: #fff;
}
.hero h1 .highlight {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero > .hero-content > p {
  font-size: 17px; color: var(--text-secondary);
  line-height: 1.8; margin-bottom: 32px;
  max-width: 560px;
}
.hero-stats {
  display: flex; gap: 40px; margin-top: 48px; flex-wrap: wrap;
}
.hero-stat .num {
  font-size: 32px; font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-stat .label { font-size: 13px; color: var(--text-muted); margin-top: 4px; }

/* ---- 分类标签 ---- */
.category-tabs {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.category-tabs::-webkit-scrollbar { display: none; }
.category-tabs-inner {
  max-width: 1280px; margin: 0 auto;
  padding: 0 24px;
  display: flex; gap: 4px; align-items: center;
  min-width: max-content;
}
.cat-tab {
  padding: 14px 18px;
  font-size: 14px; font-weight: 500;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
}
.cat-tab:hover { color: var(--primary); }
.cat-tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 700; }

/* ---- 视频网格 ---- */
.video-grid { display: grid; gap: 20px; }
.video-grid-4 { grid-template-columns: repeat(4, 1fr); }
.video-grid-3 { grid-template-columns: repeat(3, 1fr); }

/* ---- 视频卡片 ---- */
.video-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255,75,139,0.4);
}
.video-thumb {
  position: relative; overflow: hidden;
  aspect-ratio: 16/9;
  background: #1A1A35;
}
.video-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.08); }
.video-quality {
  position: absolute; top: 8px; left: 8px;
  background: rgba(0,0,0,0.7);
  color: #FFD700; font-size: 11px; font-weight: 700;
  padding: 2px 7px; border-radius: 4px;
}
.video-duration {
  position: absolute; bottom: 8px; right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff; font-size: 12px; font-weight: 600;
  padding: 2px 7px; border-radius: 4px;
}
.video-play-btn {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: opacity var(--transition);
  background: rgba(0,0,0,0.3);
}
.video-card:hover .video-play-btn { opacity: 1; }
.play-icon {
  width: 56px; height: 56px;
  background: var(--gradient-main);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 24px rgba(255,75,139,0.5);
  transition: transform var(--transition);
}
.video-card:hover .play-icon { transform: scale(1.1); }
.play-icon svg {
  width: 24px; height: 24px; fill: #fff;
  margin-left: 3px;
}
.video-info { padding: 14px; }
.video-info h3 {
  font-size: 14px; font-weight: 600;
  line-height: 1.5; margin-bottom: 10px;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 8px; flex-wrap: wrap; gap: 6px;
}
.video-author {
  display: flex; align-items: center; gap: 6px;
  font-size: 12px; color: var(--text-muted);
}
.video-author img {
  width: 22px; height: 22px;
  border-radius: 50%; object-fit: cover;
  border: 1px solid var(--border);
}
.video-stats {
  display: flex; gap: 12px;
  font-size: 12px; color: var(--text-muted);
}
.badge {
  font-size: 11px; font-weight: 700;
  padding: 2px 8px; border-radius: 4px;
}
.badge-hot { background: rgba(255,75,139,0.2); color: var(--primary); }
.badge-new { background: rgba(6,182,212,0.2); color: var(--accent2); }

/* ---- 社区卡片 ---- */
.community-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.community-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition);
}
.community-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255,75,139,0.4);
  box-shadow: var(--shadow-hover);
}
.community-icon { font-size: 40px; margin-bottom: 16px; }
.community-card h3 {
  font-size: 18px; font-weight: 700; margin-bottom: 10px;
  color: var(--text);
}
.community-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; }
.community-count {
  font-size: 32px; font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---- AI功能卡片 ---- */
.ai-features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.ai-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: all var(--transition);
}
.ai-card:hover {
  transform: translateY(-4px);
  border-color: rgba(168,85,247,0.4);
  box-shadow: 0 16px 48px rgba(168,85,247,0.2);
}
.ai-card-icon { font-size: 36px; margin-bottom: 16px; }
.ai-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.ai-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; }
.ai-badge {
  display: inline-block;
  background: rgba(168,85,247,0.15);
  border: 1px solid rgba(168,85,247,0.3);
  color: var(--accent);
  font-size: 11px; font-weight: 700;
  padding: 3px 10px; border-radius: 8px;
}

/* ---- 特色横幅 ---- */
.feature-banner {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 60px; align-items: center;
}
.feature-banner-text h2 {
  font-size: 32px; font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}
.feature-banner-text p {
  font-size: 15px; color: var(--text-secondary);
  line-height: 1.9; margin-bottom: 28px;
}
.feature-banner-img img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  width: 100%;
}

/* ---- 专家卡片 ---- */
.expert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.expert-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  transition: all var(--transition);
}
.expert-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255,75,139,0.4);
  box-shadow: var(--shadow-hover);
}
.expert-avatar {
  width: 80px; height: 80px;
  border-radius: 50%; object-fit: cover;
  border: 3px solid var(--primary);
  margin: 0 auto 16px;
  box-shadow: 0 0 20px rgba(255,75,139,0.3);
}
.expert-name { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.expert-title { font-size: 12px; color: var(--primary); margin-bottom: 12px; font-weight: 600; }
.expert-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; }
.expert-tags { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; margin-bottom: 16px; }
.expert-tag {
  font-size: 11px; padding: 3px 8px;
  background: rgba(255,75,139,0.1);
  border: 1px solid rgba(255,75,139,0.2);
  color: var(--primary); border-radius: 8px;
}
.expert-actions { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.expert-actions a {
  font-size: 12px; padding: 6px 14px;
  background: var(--gradient-main); color: #fff;
  border-radius: 16px; font-weight: 600;
  transition: opacity var(--transition);
}
.expert-actions a:hover { opacity: 0.85; }

/* ---- 评论卡片 ---- */
.reviews-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.review-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all var(--transition);
}
.review-card:hover { border-color: rgba(255,75,139,0.3); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 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-user-info .name { font-size: 14px; font-weight: 700; }
.review-user-info .date { font-size: 12px; color: var(--text-muted); }
.review-stars { color: #FFD700; font-size: 14px; margin-bottom: 10px; }
.review-text { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 12px; }
.review-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.review-tag {
  font-size: 11px; padding: 2px 8px;
  background: rgba(255,107,53,0.1);
  border: 1px solid rgba(255,107,53,0.2);
  color: var(--secondary); border-radius: 8px;
}

/* ---- How-To步骤 ---- */
.howto-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.howto-step {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 20px; text-align: center;
  position: relative;
}
.step-num {
  width: 48px; height: 48px;
  background: var(--gradient-main);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 900; color: #fff;
  margin: 0 auto 16px;
}
.howto-step h4 { font-size: 16px; font-weight: 700; margin-bottom: 10px; }
.howto-step p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; }

/* ---- 合作伙伴 ---- */
.partner-wall {
  display: flex; flex-wrap: wrap; gap: 12px;
  justify-content: center;
}
.partner-logo {
  padding: 12px 24px;
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px; font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition);
}
.partner-logo:hover {
  border-color: rgba(255,75,139,0.4);
  color: var(--primary);
}

/* ---- FAQ ---- */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--gradient-card);
}
.faq-question {
  padding: 18px 24px;
  font-size: 15px; font-weight: 600;
  cursor: pointer;
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px;
  transition: background var(--transition);
}
.faq-question:hover { background: rgba(255,75,139,0.05); }
.faq-item.open .faq-question { color: var(--primary); }
.faq-icon {
  font-size: 20px; font-weight: 300;
  color: var(--primary); 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 0.4s ease;
}
.faq-answer-inner {
  padding: 0 24px 18px;
  font-size: 14px; color: var(--text-secondary); line-height: 1.8;
}

/* ---- 联系区 ---- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.contact-info-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}
.contact-info-card h3 {
  font-size: 20px; font-weight: 700; margin-bottom: 24px;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.contact-item {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 14px 0; border-bottom: 1px solid var(--border);
}
.contact-item:last-child { border-bottom: none; }
.contact-icon { font-size: 22px; flex-shrink: 0; margin-top: 2px; }
.contact-item-text .label { font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }
.contact-item-text .value { font-size: 14px; font-weight: 600; color: var(--text); }
.qr-codes { display: flex; gap: 20px; flex-wrap: wrap; margin-top: 20px; }
.qr-item { text-align: center; }
.qr-item img {
  width: 120px; height: 120px;
  border-radius: 10px;
  border: 2px solid var(--border);
  object-fit: cover;
}
.qr-item p { font-size: 12px; color: var(--text-muted); margin-top: 8px; }

/* ---- 分享栏 ---- */
.share-bar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.share-label { font-size: 13px; color: var(--text-muted); }
.share-btn {
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px; font-weight: 600;
  transition: all var(--transition);
  border: 1px solid var(--border);
  color: var(--text-secondary);
}
.share-btn:hover { border-color: var(--primary); color: var(--primary); background: rgba(255,75,139,0.08); }

/* ---- 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; margin-bottom: 40px;
}
.footer-brand p {
  font-size: 13px; color: var(--text-muted);
  line-height: 1.8; margin-bottom: 12px;
}
.footer-social { display: flex; gap: 10px; }
.social-icon {
  width: 36px; height: 36px;
  background: rgba(255,75,139,0.1);
  border: 1px solid rgba(255,75,139,0.2);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
  transition: all var(--transition);
}
.social-icon:hover { background: rgba(255,75,139,0.2); border-color: var(--primary); }
.footer-col h4 {
  font-size: 14px; font-weight: 700;
  color: var(--text); margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col ul li a {
  font-size: 13px; color: var(--text-muted);
  transition: color var(--transition);
}
.footer-col ul li a:hover { color: var(--primary); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px; color: var(--text-muted);
  margin-bottom: 6px; line-height: 1.8;
}
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--primary); }

/* ---- 页面Hero ---- */
.page-hero {
  background: var(--gradient-card);
  border-bottom: 1px solid var(--border);
  padding: 48px 24px;
  text-align: center;
}
.page-hero h1 {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}
.page-hero p { font-size: 16px; color: var(--text-secondary); }

/* ---- 视频模态框 ---- */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.85);
  z-index: 9000;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity var(--transition);
}
.modal-overlay.active { opacity: 1; pointer-events: all; }
.modal-video {
  background: #1A1A35;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 90%; max-width: 640px;
  position: relative;
  overflow: hidden;
  transform: scale(0.9);
  transition: transform var(--transition);
}
.modal-overlay.active .modal-video { transform: scale(1); }
.modal-close {
  position: absolute; top: 12px; right: 12px;
  width: 32px; height: 32px;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; color: #fff; cursor: pointer; z-index: 1;
  transition: background var(--transition);
}
.modal-close:hover { background: var(--primary); }
.video-player-wrap { aspect-ratio: 16/9; }

/* ---- 响应式 ---- */
@media (max-width: 1200px) {
  .video-grid-4 { grid-template-columns: repeat(3, 1fr); }
  .expert-grid { grid-template-columns: repeat(3, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  .video-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .video-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .community-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-features { grid-template-columns: repeat(2, 1fr); }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .howto-steps { grid-template-columns: repeat(2, 1fr); }
  .feature-banner { grid-template-columns: 1fr; }
  .feature-banner-img { order: -1; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .main-nav {
    display: none;
    position: fixed; top: var(--header-h); left: 0; right: 0;
    background: rgba(13,13,26,0.98);
    flex-direction: column; align-items: flex-start;
    padding: 16px; gap: 4px;
    border-bottom: 1px solid var(--border);
    z-index: 99;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 16px; width: 100%; border-radius: 8px; }
  .menu-toggle { display: flex; }
  .hero { min-height: 70vh; padding: 60px 20px; }
  .hero h1 { font-size: 32px; }
  .hero-stats { gap: 24px; }
  .section { padding: 48px 0; }
  .section-title h2 { font-size: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}
@media (max-width: 540px) {
  .video-grid-4, .video-grid-3 { grid-template-columns: 1fr 1fr; }
  .community-grid { grid-template-columns: 1fr; }
  .ai-features { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .howto-steps { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; gap: 16px; }
}
@media (max-width: 360px) {
  .video-grid-4, .video-grid-3 { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
}

/* ---- 分享区 ---- */
.share-section {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 20px 0;
}
.share-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.share-text h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}
.share-text p {
  font-size: 13px;
  color: var(--text-muted);
}

/* ---- 页脚新增类 ---- */
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-logo-img {
  height: 40px;
  width: auto;
  border-radius: 8px;
}
.footer-domain {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.footer-domain a {
  color: var(--primary);
}
.footer-contact-bar {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: center;
}
.footer-contact-item {
  font-size: 13px;
  color: var(--text-muted);
}
.footer-contact-label {
  color: var(--text-secondary);
  font-weight: 600;
}
.modal-video-info {
  padding: 16px;
}
.modal-video-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}
.btn-search {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px;
  display: flex;
  align-items: center;
  transition: color var(--transition);
}
.btn-search:hover { color: var(--primary); }

/* ---- JSON代码块溢出修复 ---- */
.json-block {
  background: #1e1e1e;
  border-radius: 12px;
  overflow: hidden;       /* 容器本身不溢出 */
  max-width: 100%;
  box-sizing: border-box;
}
.json-pre {
  margin: 0;
  padding: 24px;
  overflow-x: auto;       /* 横向滚动而非溢出 */
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  max-width: 100%;
  box-sizing: border-box;
  white-space: pre;       /* 保留JSON格式 */
  word-break: normal;     /* 不强制断行，保持JSON可读性 */
  word-wrap: normal;
}
.json-code {
  font-family: 'Courier New', Courier, monospace;
  font-size: 13px;
  line-height: 1.7;
  color: #a6e22e;
  display: block;
  min-width: 0;
}
/* 移动端JSON块字体缩小，防止溢出 */
@media (max-width: 768px) {
  .json-code {
    font-size: 11px;
  }
  .json-pre {
    padding: 16px;
  }
}