/* =============================================
   高清3D动漫 全站样式 | bdfozn.cn
   原创配色：深蓝主色 + 青蓝高亮 + 橙色点缀
   ============================================= */

/* ---- CSS 变量 ---- */
:root {
  --navy:   #0d1b2e;
  --navy2:  #142338;
  --navy3:  #1c3050;
  --cyan:   #00c6e0;
  --cyan2:  #00a8c0;
  --orange: #ff6b35;
  --orange2:#e55a25;
  --white:  #ffffff;
  --gray1:  #f4f7fb;
  --gray2:  #e2e8f0;
  --gray3:  #94a3b8;
  --text1:  #1a2840;
  --text2:  #4a5a72;
  --shadow: 0 4px 24px rgba(13,27,46,.12);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: all .25s cubic-bezier(.4,0,.2,1);
}

/* ---- 重置 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB',
               'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  background: var(--white);
  color: var(--text1);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }

/* ---- 容器 ---- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---- 顶部公告条 ---- */
.top-notice {
  background: linear-gradient(90deg, var(--navy3), var(--navy2));
  color: rgba(255,255,255,.85);
  text-align: center;
  padding: 9px 20px;
  font-size: .82rem;
  letter-spacing: .02em;
}
.top-notice a {
  color: var(--cyan);
  font-weight: 700;
  margin-left: 10px;
  border-bottom: 1px solid var(--cyan);
  transition: var(--transition);
}
.top-notice a:hover { color: #fff; border-color: #fff; }

/* ---- 导航栏 ---- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--navy);
  box-shadow: 0 2px 16px rgba(0,0,0,.35);
  transition: box-shadow .3s;
}
.navbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  height: 62px;
  display: flex;
  align-items: center;
  gap: 28px;
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.navbar-logo { width: 36px; height: 36px; border-radius: 8px; object-fit: cover; }
.navbar-name {
  font-size: 1.22rem;
  font-weight: 900;
  color: #fff;
  letter-spacing: .04em;
}
.navbar-name span { color: var(--cyan); }
.navbar-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.navbar-nav a {
  color: rgba(255,255,255,.78);
  padding: 6px 13px;
  border-radius: 6px;
  font-size: .9rem;
  font-weight: 500;
  transition: var(--transition);
  white-space: nowrap;
}
.navbar-nav a:hover, .navbar-nav a.active {
  color: #fff;
  background: rgba(0,198,224,.15);
}
.navbar-nav a.active { color: var(--cyan); }

/* 导航搜索 */
.navbar-search {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 24px;
  overflow: hidden;
  transition: var(--transition);
  flex-shrink: 0;
}
.navbar-search:focus-within {
  background: rgba(255,255,255,.14);
  border-color: var(--cyan);
}
.navbar-search input {
  background: none;
  border: none;
  outline: none;
  color: #fff;
  padding: 7px 14px;
  font-size: .85rem;
  width: 180px;
}
.navbar-search input::placeholder { color: rgba(255,255,255,.4); }
.navbar-search button {
  padding: 7px 14px;
  color: rgba(255,255,255,.6);
  transition: var(--transition);
}
.navbar-search button:hover { color: var(--cyan); }

/* 汉堡菜单 */
.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  margin-left: auto;
}
.navbar-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: var(--transition);
}

/* ---- 移动端菜单 ---- */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--navy);
  z-index: 999;
  padding: 80px 24px 24px;
  flex-direction: column;
  gap: 4px;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform .3s cubic-bezier(.4,0,.2,1);
}
.mobile-menu.open { transform: translateX(0); }
.mobile-menu a {
  color: rgba(255,255,255,.85);
  padding: 14px 16px;
  border-radius: 10px;
  font-size: 1.05rem;
  font-weight: 600;
  transition: var(--transition);
}
.mobile-menu a:hover { background: rgba(0,198,224,.12); color: var(--cyan); }
.mobile-search {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 10px;
  padding: 10px 14px;
  margin-bottom: 16px;
}
.mobile-search input {
  background: none;
  border: none;
  outline: none;
  color: #fff;
  font-size: .9rem;
  flex: 1;
}
.mobile-search input::placeholder { color: rgba(255,255,255,.4); }

/* ---- 搜索弹窗 ---- */
.search-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.7);
  z-index: 2000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 80px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s;
}
.search-overlay.open { opacity: 1; pointer-events: all; }
.search-box {
  background: var(--navy2);
  border-radius: 16px;
  padding: 36px 32px 28px;
  width: 100%;
  max-width: 560px;
  position: relative;
  border: 1px solid rgba(255,255,255,.1);
}
.search-box-row {
  display: flex;
  gap: 0;
  border: 2px solid var(--cyan);
  border-radius: 10px;
  overflow: hidden;
}
.search-box-row input {
  flex: 1;
  background: rgba(255,255,255,.06);
  border: none;
  outline: none;
  color: #fff;
  padding: 14px 18px;
  font-size: 1rem;
}
.search-box-row input::placeholder { color: rgba(255,255,255,.4); }
.search-box-row button {
  background: var(--cyan);
  color: var(--navy);
  padding: 14px 22px;
  font-weight: 700;
  font-size: .95rem;
  transition: var(--transition);
}
.search-box-row button:hover { background: var(--cyan2); }
.search-hot {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-size: .82rem;
  color: rgba(255,255,255,.5);
}
.search-hot a {
  color: rgba(255,255,255,.7);
  background: rgba(255,255,255,.07);
  padding: 4px 12px;
  border-radius: 20px;
  transition: var(--transition);
}
.search-hot a:hover { background: var(--cyan); color: var(--navy); }

/* ---- 通用按钮 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 28px;
  border-radius: 30px;
  font-size: .95rem;
  font-weight: 700;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--cyan), var(--cyan2));
  color: var(--navy);
  box-shadow: 0 4px 20px rgba(0,198,224,.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0,198,224,.5);
}
.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,.4);
}
.btn-outline:hover {
  background: rgba(255,255,255,.1);
  border-color: #fff;
}
.btn-ghost {
  color: var(--cyan);
  font-weight: 700;
  font-size: .88rem;
  padding: 0;
  transition: var(--transition);
}
.btn-ghost:hover { color: var(--cyan2); }

/* ---- 通用区块 ---- */
.section { padding: 72px 0; }
.section-alt { background: var(--gray1); }
.wzjmos { text-align: center; margin-bottom: 48px; }
.vk1hg {
  display: inline-block;
  background: linear-gradient(135deg, rgba(0,198,224,.12), rgba(0,198,224,.06));
  color: var(--cyan2);
  border: 1px solid rgba(0,198,224,.25);
  padding: 5px 16px;
  border-radius: 20px;
  font-size: .75rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 900;
  color: var(--navy);
  margin-bottom: 14px;
  line-height: 1.3;
}
.section-title em {
  font-style: normal;
  color: var(--cyan2);
}
.juuwhv {
  color: var(--text2);
  font-size: .97rem;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ---- Hero 首屏 ---- */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--navy);
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .22;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    rgba(13,27,46,.95) 0%,
    rgba(13,27,46,.7) 50%,
    rgba(13,27,46,.4) 100%);
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  width: 100%;
}
.sir4qt2 {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0,198,224,.12);
  border: 1px solid rgba(0,198,224,.3);
  color: var(--cyan);
  padding: 7px 16px;
  border-radius: 20px;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .04em;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 900;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 20px;
}
.hero h1 .brand { color: var(--cyan); }
.hero h1 .highlight {
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  color: rgba(255,255,255,.72);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 500px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 36px; }
.hero-stats {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat-num {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--cyan);
  line-height: 1;
}
.hero-stat-label {
  font-size: .72rem;
  color: rgba(255,255,255,.5);
  margin-top: 4px;
}

/* Hero 右侧卡片 */
.hero-visual { position: relative; }
.hero-card {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 16px;
  overflow: hidden;
  backdrop-filter: blur(8px);
}
.hero-card-info {
  padding: 16px;
}
.hero-card-title {
  color: #fff;
  font-size: .9rem;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.4;
}
.hero-card-meta {
  display: flex;
  gap: 14px;
  font-size: .78rem;
  color: rgba(255,255,255,.5);
}
.hero-float-badge {
  position: absolute;
  top: -12px;
  right: 20px;
  background: var(--orange);
  color: #fff;
  padding: 5px 14px;
  border-radius: 20px;
  font-size: .78rem;
  font-weight: 800;
  box-shadow: 0 4px 12px rgba(255,107,53,.4);
}

/* ---- 视频卡片 ---- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.video-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid var(--gray2);
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(13,27,46,.16);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--navy2);
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,.35);
  opacity: 0;
  transition: opacity .25s;
}
.video-card:hover .video-play-btn { opacity: 1; }
.play-icon {
  width: 52px;
  height: 52px;
  background: rgba(0,198,224,.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(.85);
  transition: transform .25s;
  box-shadow: 0 4px 20px rgba(0,198,224,.5);
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon svg {
  width: 22px;
  height: 22px;
  fill: var(--navy);
  margin-left: 3px;
}
.o1fcx {
  position: absolute;
  bottom: 8px;
  right: 10px;
  background: rgba(0,0,0,.75);
  color: #fff;
  font-size: .72rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-info { padding: 14px 16px; }
.video-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
}
.rnol8wa {
  background: rgba(0,198,224,.1);
  color: var(--cyan2);
  border: 1px solid rgba(0,198,224,.2);
  padding: 2px 9px;
  border-radius: 12px;
  font-size: .72rem;
  font-weight: 600;
}
.badge {
  background: var(--orange);
  color: #fff;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: .7rem;
  font-weight: 800;
}
.badge-new { background: #10b981; }
.video-title {
  font-size: .9rem;
  font-weight: 700;
  color: var(--text1);
  line-height: 1.5;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.en2po0 {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: .76rem;
}
.gws4p652 { display: flex; gap: 10px; color: var(--gray3); }

/* ---- 分类标签 ---- */
.cat-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}
.cat-tab {
  padding: 7px 18px;
  border-radius: 24px;
  font-size: .85rem;
  font-weight: 600;
  color: var(--text2);
  background: var(--gray1);
  border: 1px solid var(--gray2);
  transition: var(--transition);
  cursor: pointer;
}
.cat-tab:hover { border-color: var(--cyan); color: var(--cyan2); }
.cat-tab.active {
  background: var(--cyan);
  color: var(--navy);
  border-color: var(--cyan);
  box-shadow: 0 4px 12px rgba(0,198,224,.3);
}

/* ---- 功能卡片网格 ---- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.feature-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray2);
  transition: var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(13,27,46,.14);
  border-color: var(--cyan);
}
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
}
.feature-icon-orange { background: rgba(255,107,53,.12); }
.feature-icon-cyan   { background: rgba(0,198,224,.12); }
.feature-icon-navy   { background: rgba(13,27,46,.08); }
.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 10px;
}
.feature-card p {
  color: var(--text2);
  font-size: .88rem;
  line-height: 1.7;
  margin-bottom: 14px;
}

/* ---- AI 区块 ---- */
.ai-section {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy2) 100%);
  padding: 80px 0;
}
.ai-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.ai-content .vk1hg { color: var(--cyan); border-color: rgba(0,198,224,.3); }
.ai-content h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 900;
  color: #fff;
  line-height: 1.3;
  margin: 14px 0 18px;
}
.ai-content h2 em { font-style: normal; color: var(--cyan); }
.ai-content > p {
  color: rgba(255,255,255,.7);
  line-height: 1.8;
  margin-bottom: 28px;
}
.ai-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 32px;
}
.ai-feat {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 10px;
  padding: 16px;
}
.ai-feat-icon { font-size: 1.4rem; margin-bottom: 8px; }
.ai-feat h4 { color: #fff; font-size: .9rem; font-weight: 700; margin-bottom: 6px; }
.ai-feat p { color: rgba(255,255,255,.55); font-size: .8rem; line-height: 1.6; }
.ai-image { border-radius: 16px; overflow: hidden; box-shadow: 0 20px 60px rgba(0,0,0,.4); }
.ai-image img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }

/* ---- 社区 ---- */
.community-banner {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 48px;
}
.community-banner img {
  width: 100%;
  aspect-ratio: 21/6;
  object-fit: cover;
}
.community-banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(13,27,46,.85) 0%, rgba(13,27,46,.4) 100%);
  display: flex;
  align-items: center;
  padding: 0 48px;
}
.community-banner-text h2 {
  color: #fff;
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  font-weight: 900;
  margin-bottom: 8px;
}
.community-banner-text p {
  color: rgba(255,255,255,.7);
  margin-bottom: 20px;
  font-size: .95rem;
}
.community-features {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}
.comm-feat {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray2);
  transition: var(--transition);
}
.comm-feat:hover { transform: translateY(-4px); border-color: var(--cyan); }
.comm-feat-icon { font-size: 2rem; margin-bottom: 12px; }
.comm-feat h4 { font-size: .95rem; font-weight: 800; color: var(--navy); margin-bottom: 8px; }
.comm-feat p { font-size: .82rem; color: var(--text2); line-height: 1.6; }

/* ---- 专家卡片 ---- */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
}
.expert-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray2);
  transition: var(--transition);
}
.expert-card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(13,27,46,.16); }
.expert-avatar {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
}
.expert-info { padding: 20px; }
.expert-name { font-size: 1.1rem; font-weight: 900; color: var(--navy); margin-bottom: 4px; }
.expert-role { font-size: .82rem; color: var(--cyan2); font-weight: 600; margin-bottom: 12px; }
.expert-desc { font-size: .85rem; color: var(--text2); line-height: 1.7; margin-bottom: 14px; }
.expert-awards { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.expert-award {
  background: rgba(0,198,224,.08);
  border: 1px solid rgba(0,198,224,.2);
  color: var(--text2);
  padding: 3px 10px;
  border-radius: 12px;
  font-size: .74rem;
}
.expert-actions { display: flex; gap: 10px; }
.expert-btn-primary {
  flex: 1;
  text-align: center;
  background: var(--cyan);
  color: var(--navy);
  padding: 9px 0;
  border-radius: 8px;
  font-size: .85rem;
  font-weight: 700;
  transition: var(--transition);
}
.expert-btn-primary:hover { background: var(--cyan2); }
.expert-btn-outline {
  flex: 1;
  text-align: center;
  background: transparent;
  color: var(--text2);
  padding: 9px 0;
  border-radius: 8px;
  font-size: .85rem;
  font-weight: 700;
  border: 1px solid var(--gray2);
  transition: var(--transition);
}
.expert-btn-outline:hover { border-color: var(--cyan); color: var(--cyan2); }

/* ---- 合作伙伴 ---- */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
}
.partner-item {
  background: var(--white);
  border: 1px solid var(--gray2);
  border-radius: 10px;
  padding: 18px 12px;
  text-align: center;
  font-size: .88rem;
  font-weight: 700;
  color: var(--text2);
  transition: var(--transition);
}
.partner-item:hover {
  border-color: var(--cyan);
  color: var(--cyan2);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

/* ---- How-To 步骤 ---- */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}
.howto-step {
  text-align: center;
  padding: 28px 20px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--gray2);
  transition: var(--transition);
}
.howto-step:hover { transform: translateY(-4px); border-color: var(--cyan); }
.howto-step-icon { font-size: 2.2rem; margin-bottom: 14px; }
.howto-step h4 { font-size: 1rem; font-weight: 800; color: var(--navy); margin-bottom: 8px; }
.howto-step p { font-size: .84rem; color: var(--text2); line-height: 1.7; }

/* ---- 用户评价 ---- */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.review-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray2);
  transition: var(--transition);
}
.review-card:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(13,27,46,.14); }
.review-header { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cyan), var(--cyan2));
  color: var(--navy);
  font-size: 1.1rem;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.review-user { font-size: .9rem; font-weight: 700; color: var(--navy); margin-bottom: 3px; }
.review-stars { color: #f59e0b; font-size: .85rem; }
.review-text { font-size: .88rem; color: var(--text2); line-height: 1.75; margin-bottom: 14px; }
.review-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 10px; }
.j0tlabv {
  background: rgba(0,198,224,.08);
  color: var(--cyan2);
  border: 1px solid rgba(0,198,224,.2);
  padding: 2px 9px;
  border-radius: 12px;
  font-size: .72rem;
  font-weight: 600;
}
.review-date { font-size: .75rem; color: var(--gray3); }

/* ---- FAQ ---- */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--white);
  border-radius: var(--radius-sm);
  border: 1px solid var(--gray2);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--cyan); }
.faq-item.open { border-color: var(--cyan); box-shadow: 0 4px 16px rgba(0,198,224,.12); }
.faq-q {
  padding: 18px 20px;
  font-size: .95rem;
  font-weight: 700;
  color: var(--navy);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  user-select: none;
}
.faq-q:hover { color: var(--cyan2); }
.faq-arrow {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--gray3);
  transition: transform .25s;
}
.faq-item.open .faq-arrow { transform: rotate(180deg); color: var(--cyan); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s cubic-bezier(.4,0,.2,1);
}
.faq-item.open .faq-a { max-height: 400px; }
.faq-a > div {
  padding: 0 20px 18px;
  font-size: .88rem;
  color: var(--text2);
  line-height: 1.8;
  border-top: 1px solid var(--gray2);
  padding-top: 14px;
}

/* ---- 联系卡片 ---- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}
.contact-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray2);
  transition: var(--transition);
}
.contact-card:hover { transform: translateY(-3px); border-color: var(--cyan); }
.contact-icon { font-size: 1.8rem; margin-bottom: 10px; }
.contact-label { font-size: .75rem; color: var(--gray3); font-weight: 600; text-transform: uppercase; letter-spacing: .06em; margin-bottom: 6px; }
.contact-value { font-size: .9rem; font-weight: 700; color: var(--navy); }
.contact-value a { color: var(--cyan2); }
.contact-value a:hover { text-decoration: underline; }

/* ---- 分享栏 ---- */
.share-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  font-size: .85rem;
  color: var(--text2);
}
.share-btn {
  padding: 7px 16px;
  border-radius: 20px;
  font-size: .82rem;
  font-weight: 700;
  transition: var(--transition);
  cursor: pointer;
}
.share-wechat  { background: rgba(7,193,96,.1);  color: #07c160; border: 1px solid rgba(7,193,96,.25); }
.share-weibo   { background: rgba(230,22,45,.1);  color: #e6162d; border: 1px solid rgba(230,22,45,.25); }
.share-douyin  { background: rgba(0,0,0,.06);     color: var(--navy); border: 1px solid rgba(0,0,0,.12); }
.share-bili    { background: rgba(0,161,214,.1);  color: #00a1d6; border: 1px solid rgba(0,161,214,.25); }
.share-btn:hover { transform: translateY(-1px); filter: brightness(1.1); }

/* ---- 页面 Hero（内页） ---- */
.page-hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy3) 100%);
  padding: 56px 0 48px;
}
.page-hero .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.page-hero h1 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 900;
  color: #fff;
  margin: 14px 0 10px;
}
.page-hero p { color: rgba(255,255,255,.65); font-size: .95rem; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .82rem;
  color: rgba(255,255,255,.5);
  margin-bottom: 8px;
}
.breadcrumb a { color: rgba(255,255,255,.6); transition: var(--transition); }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb strong { color: var(--cyan); }
.breadcrumb span { color: rgba(255,255,255,.3); }

/* ---- 页脚 ---- */
.footer {
  background: var(--navy);
  color: rgba(255,255,255,.7);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-brand-logo { width: 100px; margin-bottom: 16px; }
.footer-brand p { font-size: .85rem; line-height: 1.8; color: rgba(255,255,255,.55); margin-bottom: 18px; }
.footer-social { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.footer-social .share-btn { font-size: .78rem; padding: 5px 12px; }
.footer-qr { display: flex; gap: 16px; }
.footer-qr-item { text-align: center; }
.footer-qr-item img { width: 70px; height: 70px; border-radius: 8px; border: 2px solid rgba(255,255,255,.12); }
.footer-qr-item span { display: block; font-size: .72rem; color: rgba(255,255,255,.4); margin-top: 5px; }
.footer-col h4 {
  color: #fff;
  font-size: .9rem;
  font-weight: 800;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--cyan);
  display: inline-block;
}
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col a {
  font-size: .84rem;
  color: rgba(255,255,255,.55);
  transition: var(--transition);
}
.footer-col a:hover { color: var(--cyan); padding-left: 4px; }
.footer-bottom {
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: .8rem;
  color: rgba(255,255,255,.4);
}
.footer-links { display: flex; gap: 16px; }
.footer-links a { color: rgba(255,255,255,.4); transition: var(--transition); }
.footer-links a:hover { color: var(--cyan); }

/* ---- 回到顶部 ---- */
#back-top {
  position: fixed;
  bottom: 28px;
  right: 24px;
  width: 44px;
  height: 44px;
  background: var(--cyan);
  color: var(--navy);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0,198,224,.4);
  opacity: 0;
  transform: translateY(16px);
  transition: var(--transition);
  pointer-events: none;
  z-index: 500;
}
#back-top.show { opacity: 1; transform: translateY(0); pointer-events: all; }
#back-top:hover { background: var(--cyan2); transform: translateY(-2px); }

/* ---- Toast ---- */
#toast {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: rgba(13,27,46,.92);
  color: #fff;
  padding: 12px 24px;
  border-radius: 30px;
  font-size: .88rem;
  font-weight: 600;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: all .3s;
  z-index: 3000;
  border: 1px solid rgba(0,198,224,.2);
  backdrop-filter: blur(8px);
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-content { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { display: none; }
  .ai-grid { grid-template-columns: 1fr; gap: 36px; }
}

@media (max-width: 768px) {
  .navbar-nav, .navbar-search { display: none; }
  .navbar-toggle { display: flex; }
  .mobile-menu { display: flex; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero { min-height: 70vh; }
  .hero h1 { font-size: 1.8rem; }
  .section { padding: 48px 0; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .community-banner img { aspect-ratio: 16/9; }
  .community-banner-overlay { padding: 0 24px; }
  .expert-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
  .hero-stats { gap: 16px; }
  .feature-grid { grid-template-columns: 1fr; }
  .howto-steps { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .ai-features { grid-template-columns: 1fr; }
  .partner-grid { grid-template-columns: repeat(2, 1fr); }
}