/* ========================================
   菠萝视频 - 主样式文件
   霓虹粉蓝渐变·赛博光影·沉浸式科技娱乐风格
   ======================================== */

/* ---- CSS变量 ---- */
:root {
  --pink: #ff2d78;
  --blue: #00c6ff;
  --purple: #a855f7;
  --neon-pink: #ff4fa3;
  --neon-blue: #0ff;
  --bg-white: #f8faff;
  --bg-light: #eef2ff;
  --bg-card: #ffffff;
  --text-dark: #1a1a2e;
  --text-mid: #3d3d6b;
  --text-light: #7b7ba8;
  --gradient-main: linear-gradient(135deg, #ff2d78 0%, #a855f7 50%, #00c6ff 100%);
  --gradient-card: linear-gradient(135deg, rgba(255,45,120,0.08) 0%, rgba(0,198,255,0.08) 100%);
  --shadow-neon: 0 0 20px rgba(255,45,120,0.3), 0 0 40px rgba(0,198,255,0.15);
  --shadow-card: 0 4px 24px rgba(168,85,247,0.12);
  --radius: 16px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}

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

/* ---- 通用工具类 ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.section-alt { background: var(--bg-light); }
.text-center { text-align: center; }
.gradient-text {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
}
.btn-primary {
  background: var(--gradient-main);
  color: #fff;
  box-shadow: 0 4px 20px rgba(255,45,120,0.4);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255,45,120,0.5);
}
.btn-outline {
  background: transparent;
  color: var(--pink);
  border: 2px solid var(--pink);
}
.btn-outline:hover {
  background: var(--pink);
  color: #fff;
  transform: translateY(-2px);
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.2;
}
.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-light);
  margin-bottom: 48px;
}
.tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 600;
  background: var(--gradient-main);
  color: #fff;
  margin-bottom: 12px;
}

/* ---- 顶部公告栏 ---- */
.top-bar {
  background: var(--gradient-main);
  color: #fff;
  text-align: center;
  padding: 8px 20px;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.5px;
}
.top-bar a { color: #fff; text-decoration: underline; }

/* ---- 导航 ---- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(248,250,255,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(168,85,247,0.12);
  box-shadow: 0 2px 20px rgba(168,85,247,0.08);
}
.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  max-width: 1200px;
  margin: 0 auto;
  height: 68px;
}
.navbar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 800;
}
.navbar-logo img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  object-fit: cover;
}
.navbar-logo span { background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.navbar-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.navbar-nav a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-mid);
  transition: all var(--transition);
  white-space: nowrap;
}
.navbar-nav a:hover, .navbar-nav a.active {
  color: var(--pink);
  background: rgba(255,45,120,0.08);
}
.navbar-actions { display: flex; align-items: center; gap: 12px; }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--text-dark); border-radius: 2px; transition: all var(--transition); }

/* ---- 搜索框 ---- */
.search-bar-wrap {
  background: linear-gradient(135deg, rgba(255,45,120,0.05) 0%, rgba(0,198,255,0.05) 100%);
  border-bottom: 1px solid rgba(168,85,247,0.1);
  padding: 14px 20px;
}
.search-bar-inner {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  background: #fff;
  border: 2px solid transparent;
  border-radius: 50px;
  padding: 0 6px 0 20px;
  box-shadow: 0 2px 16px rgba(168,85,247,0.1);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.search-bar-inner:focus-within {
  border-color: var(--pink);
  box-shadow: 0 0 0 4px rgba(255,45,120,0.1);
}
.search-bar-inner input {
  flex: 1;
  border: none;
  outline: none;
  font-size: 0.95rem;
  color: var(--text-dark);
  background: transparent;
  padding: 12px 0;
}
.search-bar-inner input::placeholder { color: var(--text-light); }
.search-btn {
  background: var(--gradient-main);
  color: #fff;
  border: none;
  border-radius: 50px;
  padding: 10px 24px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}
.search-btn:hover { opacity: 0.9; transform: scale(1.02); }
.search-hot-tags {
  max-width: 700px;
  margin: 8px auto 0;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 0.82rem;
  color: var(--text-light);
}
.search-hot-tags span { color: var(--text-light); }
.search-hot-tags a {
  color: var(--pink);
  background: rgba(255,45,120,0.08);
  padding: 2px 10px;
  border-radius: 50px;
  transition: all var(--transition);
}
.search-hot-tags a:hover { background: var(--pink); color: #fff; }

/* ---- Hero Banner ---- */
.hero {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, #0d0d2b 0%, #1a0533 40%, #0a1628 100%);
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}
.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-text h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 900;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 20px;
}
.hero-text h1 .highlight {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-text p {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.75);
  margin-bottom: 36px;
  line-height: 1.8;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 40px;
  flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat .num {
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-stat .label { font-size: 0.82rem; color: rgba(255,255,255,0.6); }
.hero-visual { position: relative; }
.hero-video-card {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-neon);
  cursor: pointer;
}
.hero-video-card img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.hero-video-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.6) 0%, transparent 60%);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}
.hero-video-card:hover .hero-video-overlay { background: rgba(0,0,0,0.4); }
.play-btn-large {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  border: 2px solid rgba(255,255,255,0.4);
}
.play-btn-large:hover { background: var(--pink); border-color: var(--pink); transform: scale(1.1); }
.play-btn-large svg { width: 28px; height: 28px; fill: #fff; margin-left: 4px; }
.neon-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--gradient-main);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 50px;
}

/* ---- 视频卡片 ---- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.video-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all var(--transition);
  cursor: pointer;
  border: 1px solid rgba(168,85,247,0.08);
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(255,45,120,0.2);
  border-color: rgba(255,45,120,0.2);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #1a1a2e;
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}
.video-card:hover .video-thumb img { transform: scale(1.05); }
.video-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}
.video-card:hover .video-overlay { background: rgba(0,0,0,0.35); }
.play-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(8px);
  border: 2px solid rgba(255,255,255,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.8);
  transition: all var(--transition);
}
.video-card:hover .play-btn { opacity: 1; transform: scale(1); }
.play-btn:hover { background: var(--pink); border-color: var(--pink); }
.play-btn svg { width: 20px; height: 20px; fill: #fff; margin-left: 3px; }
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 4px;
}
.video-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--gradient-main);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 50px;
}
.video-info { padding: 16px; }
.video-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.4;
}
.video-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-light);
}
.video-meta span { display: flex; align-items: center; gap: 4px; }
.video-meta svg { width: 14px; height: 14px; fill: currentColor; }
.video-author {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid rgba(168,85,247,0.08);
}
.author-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  color: #fff;
  font-weight: 700;
  flex-shrink: 0;
}
.author-name { font-size: 0.82rem; color: var(--text-mid); font-weight: 500; }

/* ---- 社区弹幕 ---- */
.danmaku-wrap {
  background: linear-gradient(135deg, #0d0d2b 0%, #1a0533 100%);
  border-radius: var(--radius);
  padding: 24px;
  overflow: hidden;
  position: relative;
  min-height: 120px;
}
.danmaku-row {
  display: flex;
  gap: 16px;
  margin-bottom: 12px;
  animation: danmakuScroll 20s linear infinite;
  white-space: nowrap;
}
.danmaku-row:nth-child(2) { animation-duration: 25s; animation-delay: -8s; }
.danmaku-row:nth-child(3) { animation-duration: 18s; animation-delay: -4s; }
@keyframes danmakuScroll {
  from { transform: translateX(100%); }
  to { transform: translateX(-100%); }
}
.danmaku-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 50px;
  padding: 4px 14px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.85);
  white-space: nowrap;
  flex-shrink: 0;
}
.danmaku-item.pink { border-color: rgba(255,45,120,0.4); color: #ff9ec8; }
.danmaku-item.blue { border-color: rgba(0,198,255,0.4); color: #7de8ff; }
.danmaku-item.purple { border-color: rgba(168,85,247,0.4); color: #d4a8ff; }

/* ---- AI模块 ---- */
.ai-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}
.ai-tool-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid rgba(168,85,247,0.1);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.ai-tool-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-main);
  transform: scaleX(0);
  transition: transform var(--transition);
}
.ai-tool-card:hover::before { transform: scaleX(1); }
.ai-tool-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card); border-color: rgba(255,45,120,0.2); }
.ai-tool-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: var(--gradient-card);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.8rem;
}
.ai-tool-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.ai-tool-card p { font-size: 0.85rem; color: var(--text-light); line-height: 1.6; }

/* ---- 专家模块 ---- */
.experts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 24px;
}
.expert-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid rgba(168,85,247,0.1);
  transition: all var(--transition);
}
.expert-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card); }
.expert-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 16px;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: #fff;
  font-weight: 700;
  position: relative;
}
.expert-avatar::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background: var(--gradient-main);
  z-index: -1;
  opacity: 0.3;
}
.expert-name { font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.expert-title { font-size: 0.82rem; color: var(--pink); margin-bottom: 8px; font-weight: 600; }
.expert-desc { font-size: 0.82rem; color: var(--text-light); line-height: 1.6; }

/* ---- 用户评价 ---- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid rgba(168,85,247,0.1);
  transition: all var(--transition);
  position: relative;
}
.review-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-card); }
.review-card::before {
  content: '"';
  position: absolute;
  top: 16px;
  right: 20px;
  font-size: 4rem;
  color: rgba(255,45,120,0.1);
  font-family: Georgia, serif;
  line-height: 1;
}
.review-stars { color: #fbbf24; font-size: 1rem; margin-bottom: 12px; letter-spacing: 2px; }
.review-text { font-size: 0.9rem; color: var(--text-mid); line-height: 1.7; margin-bottom: 16px; }
.review-user { display: flex; align-items: center; gap: 10px; }
.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: #fff;
  font-weight: 700;
  flex-shrink: 0;
}
.review-name { font-size: 0.9rem; font-weight: 600; }
.review-date { font-size: 0.78rem; color: var(--text-light); }

/* ---- FAQ ---- */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  border: 1px solid rgba(168,85,247,0.1);
  overflow: hidden;
  transition: box-shadow var(--transition);
}
.faq-item:hover { box-shadow: var(--shadow-card); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-dark);
  transition: color var(--transition);
  user-select: none;
}
.faq-question:hover { color: var(--pink); }
.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform var(--transition);
}
.faq-icon svg { width: 12px; height: 12px; fill: #fff; }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s;
  font-size: 0.9rem;
  color: var(--text-mid);
  line-height: 1.8;
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 20px 18px; }

/* ---- 合作伙伴 ---- */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 16px;
}
.partner-logo {
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(168,85,247,0.1);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-mid);
  text-align: center;
  transition: all var(--transition);
  min-height: 70px;
}
.partner-logo:hover { border-color: var(--pink); color: var(--pink); transform: scale(1.03); }

/* ---- 联系模块 ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 32px;
}
.contact-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid rgba(168,85,247,0.1);
  transition: all var(--transition);
}
.contact-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card); }
.contact-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.6rem;
}
.contact-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
.contact-card p { font-size: 0.88rem; color: var(--text-light); line-height: 1.7; }
.qr-placeholder {
  width: 100px;
  height: 100px;
  background: var(--gradient-card);
  border: 2px dashed rgba(168,85,247,0.3);
  border-radius: var(--radius-sm);
  margin: 12px auto 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--text-light);
}

/* ---- 页脚 ---- */
.footer {
  background: linear-gradient(135deg, #0d0d2b 0%, #1a0533 100%);
  color: rgba(255,255,255,0.75);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-brand .logo-text {
  font-size: 1.4rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}
.footer-brand p { font-size: 0.88rem; line-height: 1.8; margin-bottom: 20px; }
.footer-social { display: flex; gap: 10px; }
.social-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  transition: all var(--transition);
  color: rgba(255,255,255,0.7);
}
.social-btn:hover { background: var(--pink); border-color: var(--pink); color: #fff; }
.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  transition: color var(--transition);
}
.footer-col ul li a:hover { color: var(--pink); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.45);
}
.footer-bottom a { color: rgba(255,255,255,0.45); transition: color var(--transition); }
.footer-bottom a:hover { color: var(--pink); }

/* ---- 话题社区 ---- */
.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}
.topic-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid rgba(168,85,247,0.1);
  transition: all var(--transition);
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
.topic-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-card); border-color: rgba(255,45,120,0.2); }
.topic-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}
.topic-info h4 { font-size: 0.92rem; font-weight: 700; margin-bottom: 4px; }
.topic-info p { font-size: 0.8rem; color: var(--text-light); }
.topic-heat { font-size: 0.78rem; color: var(--pink); font-weight: 600; margin-top: 4px; }

/* ---- 面包屑 ---- */
.breadcrumb {
  padding: 14px 0;
  font-size: 0.85rem;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-light); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--pink); }
.breadcrumb .sep { color: rgba(168,85,247,0.4); }
.breadcrumb .current { color: var(--pink); font-weight: 600; }

/* ---- 内页Banner ---- */
.inner-banner {
  background: linear-gradient(135deg, #0d0d2b 0%, #1a0533 100%);
  padding: 60px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.inner-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(255,45,120,0.15) 0%, transparent 50%),
              radial-gradient(circle at 70% 50%, rgba(0,198,255,0.15) 0%, transparent 50%);
  pointer-events: none;
}
.inner-banner h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800; color: #fff; margin-bottom: 12px; position: relative; }
.inner-banner p { font-size: 1rem; color: rgba(255,255,255,0.7); position: relative; }

/* ---- 加载更多 ---- */
.load-more-wrap { text-align: center; margin-top: 40px; }

/* ---- 粒子动画 ---- */
.particle {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  animation: float 6s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); opacity: 0.6; }
  50% { transform: translateY(-20px) rotate(180deg); opacity: 1; }
}

/* ---- 渐变分隔线 ---- */
.divider {
  height: 2px;
  background: var(--gradient-main);
  border: none;
  margin: 0;
  opacity: 0.2;
}

/* ---- 标签组 ---- */
.tags-group { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.tag-item {
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  background: rgba(168,85,247,0.08);
  color: var(--purple);
  border: 1px solid rgba(168,85,247,0.2);
  cursor: pointer;
  transition: all var(--transition);
}
.tag-item:hover, .tag-item.active {
  background: var(--gradient-main);
  color: #fff;
  border-color: transparent;
}

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .hero-content { grid-template-columns: 1fr; gap: 32px; padding: 60px 20px; }
  .hero-visual { display: none; }
  .navbar-nav { display: none; position: fixed; top: 68px; left: 0; right: 0; background: rgba(248,250,255,0.98); flex-direction: column; padding: 16px; gap: 4px; border-bottom: 1px solid rgba(168,85,247,0.1); }
  .navbar-nav.open { display: flex; }
  .hamburger { display: flex; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .contact-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 20px; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .video-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .reviews-grid { grid-template-columns: 1fr; }
  .experts-grid { grid-template-columns: 1fr 1fr; }
}

/* ---- 滚动条 ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-light); }
::-webkit-scrollbar-thumb { background: var(--gradient-main); border-radius: 3px; }

/* ---- 选中颜色 ---- */
::selection { background: rgba(255,45,120,0.2); color: var(--pink); }