/* ===== 黄色仓库 | whdi7n.cn | 原创样式 ===== */
:root {
  --rose-gold: #c9956c;
  --rose-light: #f2c4b0;
  --rose-pale: #fdf0ea;
  --purple-deep: #3d1a5e;
  --purple-mid: #6b3fa0;
  --purple-light: #b39ddb;
  --purple-pale: #f3eeff;
  --white: #ffffff;
  --gray-100: #f8f8f8;
  --gray-200: #eeeeee;
  --gray-400: #aaaaaa;
  --gray-600: #666666;
  --gray-800: #333333;
  --text-main: #2a1a3e;
  --shadow-sm: 0 2px 8px rgba(61,26,94,0.10);
  --shadow-md: 0 6px 24px rgba(61,26,94,0.14);
  --shadow-lg: 0 12px 40px rgba(61,26,94,0.18);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --transition: 0.28s cubic-bezier(.4,0,.2,1);
}

/* ===== Reset ===== */
*, *::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', 'WenQuanYi Micro Hei', sans-serif;
  color: var(--text-main);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ===== 噪点干扰容器（隐藏） ===== */
.xh-noise-wrap, .xhFt-noise-bot {
  display: none !important;
  visibility: hidden !important;
  position: absolute !important;
  left: -9999px !important;
  top: -9999px !important;
  width: 0 !important;
  height: 0 !important;
  overflow: hidden !important;
  pointer-events: none !important;
}
[id^="xh"], [class^="xh_n"] {
  display: none !important;
  visibility: hidden !important;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(201,149,108,0.18);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.logo-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-wrap img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
}
.logo-text {
  font-size: 1.3rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--purple-deep), var(--rose-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 2px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.main-nav a {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--gray-800);
  transition: var(--transition);
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active {
  background: var(--purple-pale);
  color: var(--purple-deep);
}
/* 搜索框 */
.header-search {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--gray-100);
  border: 1.5px solid var(--gray-200);
  border-radius: 24px;
  overflow: hidden;
  transition: var(--transition);
  flex-shrink: 0;
}
.header-search:focus-within {
  border-color: var(--rose-gold);
  box-shadow: 0 0 0 3px rgba(201,149,108,0.15);
}
.header-search input {
  border: none;
  background: transparent;
  padding: 7px 14px;
  font-size: 0.9rem;
  width: 180px;
  outline: none;
  color: var(--gray-800);
}
.header-search button {
  padding: 7px 14px;
  background: linear-gradient(135deg, var(--rose-gold), var(--purple-mid));
  color: #fff;
  font-size: 0.85rem;
  border-radius: 0 24px 24px 0;
  transition: var(--transition);
}
.header-search button:hover { opacity: 0.88; }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  cursor: pointer;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--purple-deep);
  border-radius: 2px;
  transition: var(--transition);
}

/* 导航下搜索条（移动端全宽） */
.header-search-bar {
  background: var(--gray-100);
  border-bottom: 1px solid var(--gray-200);
  padding: 10px 24px;
  display: none;
}
.header-search-bar .search-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--white);
  border: 1.5px solid var(--rose-gold);
  border-radius: 28px;
  overflow: hidden;
}
.header-search-bar input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 9px 18px;
  font-size: 0.95rem;
  outline: none;
}
.header-search-bar button {
  padding: 9px 20px;
  background: linear-gradient(135deg, var(--rose-gold), var(--purple-mid));
  color: #fff;
  font-size: 0.9rem;
  border-radius: 0 28px 28px 0;
}

/* ===== Hero Banner ===== */
.hero {
  position: relative;
  height: 560px;
  overflow: hidden;
  display: flex;
  align-items: center;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.72);
  transform: scale(1.04);
  transition: transform 8s ease;
}
.hero:hover .hero-bg { transform: scale(1.0); }
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(61,26,94,0.65) 0%, rgba(201,149,108,0.25) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  color: #fff;
}
.hero-tag {
  display: inline-block;
  background: rgba(201,149,108,0.85);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 20px;
  letter-spacing: 2px;
  margin-bottom: 16px;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 14px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.3);
}
.hero-sub {
  font-size: 1.1rem;
  opacity: 0.92;
  margin-bottom: 28px;
  max-width: 540px;
}
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: linear-gradient(135deg, var(--rose-gold), var(--purple-mid));
  color: #fff;
  border-radius: 28px;
  font-size: 1rem;
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(201,149,108,0.4);
  transition: var(--transition);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(201,149,108,0.5); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border: 2px solid rgba(255,255,255,0.8);
  color: #fff;
  border-radius: 28px;
  font-size: 1rem;
  font-weight: 600;
  transition: var(--transition);
}
.btn-outline:hover { background: rgba(255,255,255,0.15); }
.hero-stats {
  position: absolute;
  bottom: 32px;
  right: 24px;
  display: flex;
  gap: 24px;
  z-index: 2;
}
.hero-stat {
  text-align: center;
  color: #fff;
}
.hero-stat strong {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  line-height: 1;
}
.hero-stat span { font-size: 0.78rem; opacity: 0.85; }

/* ===== Section通用 ===== */
.section { padding: 72px 0; }
.section-alt { background: var(--gray-100); }
.section-purple { background: var(--purple-pale); }
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-tag {
  display: inline-block;
  background: linear-gradient(135deg, var(--rose-gold), var(--purple-mid));
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 20px;
  letter-spacing: 2px;
  margin-bottom: 12px;
}
.section-header h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  color: var(--purple-deep);
  margin-bottom: 10px;
}
.section-header p {
  color: var(--gray-600);
  font-size: 1rem;
  max-width: 560px;
  margin: 0 auto;
}

/* ===== 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-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--gray-200);
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.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(61,26,94,0.0);
  transition: var(--transition);
  opacity: 0;
}
.video-card:hover .video-play-btn { opacity: 1; background: rgba(61,26,94,0.38); }
.play-icon {
  width: 56px;
  height: 56px;
  background: rgba(255,255,255,0.92);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0,0,0,0.25);
  transform: scale(0.85);
  transition: var(--transition);
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon::after {
  content: '';
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent var(--purple-deep);
  margin-left: 4px;
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.72);
  color: #fff;
  font-size: 0.75rem;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-info { padding: 14px 16px; }
.video-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 8px; }
.video-tag {
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--purple-pale);
  color: var(--purple-mid);
  font-weight: 500;
}
.video-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  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;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--gray-400);
}
.video-meta span { display: flex; align-items: center; gap: 3px; }

/* ===== 专家卡片 ===== */
.experts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}
.expert-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: var(--transition);
  border: 1.5px solid transparent;
}
.expert-card:hover {
  border-color: var(--rose-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.expert-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 14px;
  border: 3px solid var(--rose-light);
}
.expert-name { font-size: 1.1rem; font-weight: 700; color: var(--purple-deep); margin-bottom: 4px; }
.expert-title { font-size: 0.85rem; color: var(--rose-gold); font-weight: 500; margin-bottom: 10px; }
.expert-desc { font-size: 0.88rem; color: var(--gray-600); line-height: 1.6; margin-bottom: 14px; }
.expert-awards { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; margin-bottom: 16px; }
.award-badge {
  font-size: 0.72rem;
  padding: 3px 9px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--rose-pale), var(--purple-pale));
  color: var(--purple-mid);
  font-weight: 500;
}
.expert-btns { display: flex; gap: 10px; justify-content: center; }
.btn-sm {
  padding: 7px 16px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  transition: var(--transition);
}
.btn-sm-primary {
  background: linear-gradient(135deg, var(--rose-gold), var(--purple-mid));
  color: #fff;
}
.btn-sm-outline {
  border: 1.5px solid var(--purple-mid);
  color: var(--purple-mid);
}
.btn-sm-outline:hover { background: var(--purple-pale); }

/* ===== 功能模块卡片 ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 28px 22px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border-left: 4px solid transparent;
}
.feature-card:hover {
  border-left-color: var(--rose-gold);
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--rose-pale), var(--purple-pale));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 14px;
}
.feature-card h3 { font-size: 1rem; font-weight: 700; color: var(--purple-deep); margin-bottom: 8px; }
.feature-card p { font-size: 0.87rem; color: var(--gray-600); line-height: 1.6; }

/* ===== 评价 ===== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 22px 20px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.review-card:hover { box-shadow: var(--shadow-md); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--rose-light), var(--purple-light));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
  flex-shrink: 0;
}
.review-user strong { display: block; font-size: 0.95rem; font-weight: 600; color: var(--text-main); }
.review-user span { font-size: 0.78rem; color: var(--gray-400); }
.review-stars { margin-left: auto; color: #f5a623; font-size: 0.9rem; }
.review-text { font-size: 0.9rem; color: var(--gray-600); line-height: 1.65; margin-bottom: 10px; }
.review-tag {
  display: inline-block;
  font-size: 0.72rem;
  padding: 2px 9px;
  border-radius: 10px;
  background: var(--rose-pale);
  color: var(--rose-gold);
}

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.open { border-color: var(--rose-light); }
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  cursor: pointer;
  font-size: 0.97rem;
  font-weight: 600;
  color: var(--text-main);
  background: var(--white);
  gap: 12px;
}
.faq-q:hover { background: var(--rose-pale); }
.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--purple-pale);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--purple-mid);
  flex-shrink: 0;
  transition: var(--transition);
}
.faq-item.open .faq-icon { background: var(--rose-gold); color: #fff; transform: rotate(45deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  font-size: 0.9rem;
  color: var(--gray-600);
  line-height: 1.7;
  padding: 0 20px;
  background: var(--gray-100);
}
.faq-item.open .faq-a { max-height: 300px; padding: 14px 20px; }

/* ===== 合作品牌 ===== */
.partners-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}
.partner-badge {
  padding: 10px 22px;
  background: var(--white);
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--gray-600);
  transition: var(--transition);
}
.partner-badge:hover {
  border-color: var(--rose-gold);
  color: var(--purple-deep);
  box-shadow: var(--shadow-sm);
}

/* ===== 联系 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.contact-info h3 { font-size: 1.2rem; font-weight: 700; color: var(--purple-deep); margin-bottom: 20px; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 16px;
}
.contact-item-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--rose-pale), var(--purple-pale));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.contact-item-text strong { display: block; font-size: 0.85rem; color: var(--gray-400); margin-bottom: 2px; }
.contact-item-text span { font-size: 0.95rem; color: var(--text-main); font-weight: 500; }
.qr-group { display: flex; gap: 24px; flex-wrap: wrap; }
.qr-item { text-align: center; }
.qr-item img { width: 120px; height: 120px; border-radius: var(--radius-sm); border: 1.5px solid var(--gray-200); }
.qr-item p { font-size: 0.8rem; color: var(--gray-600); margin-top: 6px; }
.office-img { border-radius: var(--radius-md); overflow: hidden; }
.office-img img { width: 100%; height: 260px; object-fit: cover; }

/* ===== 社区入口 ===== */
.community-entries {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 20px;
}
.community-entry {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--gray-200);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-main);
  transition: var(--transition);
}
.community-entry:hover {
  border-color: var(--purple-mid);
  background: var(--purple-pale);
  color: var(--purple-deep);
}

/* ===== 分享按钮 ===== */
.share-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 20px 0;
  border-top: 1px solid var(--gray-200);
  margin-top: 40px;
}
.share-bar span { font-size: 0.9rem; color: var(--gray-600); }
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  transition: var(--transition);
  border: 1.5px solid var(--gray-200);
  color: var(--gray-600);
}
.share-btn:hover { border-color: var(--rose-gold); color: var(--rose-gold); }

/* ===== Footer ===== */
.site-footer {
  background: var(--purple-deep);
  color: rgba(255,255,255,0.82);
  padding: 48px 0 24px;
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  margin-bottom: 12px;
}
.footer-brand h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
  letter-spacing: 2px;
}
.footer-brand p { font-size: 0.87rem; line-height: 1.7; max-width: 260px; }
.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--rose-light);
  margin-bottom: 14px;
}
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
  font-size: 0.87rem;
  color: rgba(255,255,255,0.7);
  transition: var(--transition);
}
.footer-col ul li a:hover { color: var(--rose-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p { font-size: 0.82rem; color: rgba(255,255,255,0.55); }
.footer-bottom a { color: var(--rose-light); }
.update-time { font-size: 0.78rem; color: rgba(255,255,255,0.45); }

/* ===== 面包屑 ===== */
.breadcrumb {
  background: var(--gray-100);
  border-bottom: 1px solid var(--gray-200);
  padding: 10px 0;
}
.breadcrumb-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--gray-400);
}
.breadcrumb-inner a { color: var(--purple-mid); }
.breadcrumb-inner a:hover { color: var(--rose-gold); }
.breadcrumb-inner span { color: var(--gray-400); }

/* ===== 内页Banner ===== */
.page-hero {
  position: relative;
  height: 280px;
  overflow: hidden;
  display: flex;
  align-items: center;
}
.page-hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.6);
}
.page-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(61,26,94,0.7), rgba(201,149,108,0.3));
}
.page-hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  color: #fff;
}
.page-hero-content h1 { font-size: clamp(1.6rem, 4vw, 2.4rem); font-weight: 800; margin-bottom: 8px; }
.page-hero-content p { font-size: 1rem; opacity: 0.88; }

/* ===== AI赋能区块 ===== */
.ai-section {
  background: linear-gradient(135deg, var(--purple-deep) 0%, #5a2d82 100%);
  color: #fff;
  padding: 72px 0;
}
.ai-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.ai-text h2 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 800; margin-bottom: 14px; }
.ai-text p { opacity: 0.88; line-height: 1.8; margin-bottom: 20px; }
.ai-features { display: flex; flex-direction: column; gap: 12px; }
.ai-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: rgba(255,255,255,0.1);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(8px);
}
.ai-feature-item span { font-size: 1.2rem; }
.ai-feature-item p { font-size: 0.9rem; opacity: 0.9; margin: 0; }
.ai-visual img {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}

/* ===== 统计数字 ===== */
.stats-bar {
  background: linear-gradient(135deg, var(--rose-gold), var(--purple-mid));
  padding: 36px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stat-item strong {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
  margin-bottom: 4px;
}
.stat-item span { font-size: 0.85rem; color: rgba(255,255,255,0.85); }

/* ===== How-To加入 ===== */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
  counter-reset: step;
}
.howto-step {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  box-shadow: var(--shadow-sm);
  position: relative;
  text-align: center;
  transition: var(--transition);
}
.howto-step:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.howto-step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--rose-gold), var(--purple-mid));
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
}
.howto-step h4 { font-size: 1rem; font-weight: 700; color: var(--purple-deep); margin: 10px 0 8px; }
.howto-step p { font-size: 0.87rem; color: var(--gray-600); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .ai-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .main-nav { display: none; }
  .header-search { display: none; }
  .hamburger { display: flex; margin-left: auto; }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(12px);
    padding: 16px 24px;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-md);
    z-index: 999;
  }
  .header-search-bar { display: block; }
  .hero { height: 420px; }
  .hero-stats { display: none; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section { padding: 48px 0; }
}
@media (max-width: 480px) {
  .hero h1 { font-size: 1.6rem; }
  .hero-btns { flex-direction: column; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .video-grid { grid-template-columns: 1fr; }
}