/* ========== 基础重置 ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #333;
  background: #fff;
}
img { max-width: 100%; height: auto; display: block; }
a { color: #1a73e8; text-decoration: none; transition: color 0.2s; }
a:hover { color: #1557b0; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: #1a1a2e; }

/* ========== 通用容器 ========== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 70px 0; }
.section-header { text-align: center; margin-bottom: 50px; }
.section-title { font-size: 32px; margin-bottom: 12px; }
.section-subtitle { font-size: 16px; color: #666; }
.section-more { text-align: center; margin-top: 40px; }

/* ========== 按钮 ========== */
.btn {
  display: inline-block;
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.25s;
}
.btn-primary { background: #1a73e8; color: #fff; border-color: #1a73e8; }
.btn-primary:hover { background: #1557b0; border-color: #1557b0; color: #fff; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(26,115,232,0.3); }
.btn-outline { background: transparent; color: #1a73e8; border-color: #1a73e8; }
.btn-outline:hover { background: #1a73e8; color: #fff; }
.btn-lg { padding: 14px 36px; font-size: 17px; }
.btn-sm { padding: 7px 16px; font-size: 13px; }

/* ========== 头部 ========== */
.site-header { box-shadow: 0 2px 12px rgba(0,0,0,0.06); position: sticky; top: 0; z-index: 100; background: #fff; }
.header-top { background: #f0f6ff; padding: 6px 0; font-size: 13px; color: #555; }
.header-top-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
.header-main { padding: 14px 0; }
.header-main-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.site-logo { display: flex; align-items: center; gap: 12px; }
.logo-icon {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, #1a73e8, #4fc3f7);
  color: #fff; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; font-weight: 800;
}
.logo-text { display: flex; flex-direction: column; }
.logo-name { font-size: 20px; font-weight: 800; color: #1a1a2e; }
.logo-slogan { font-size: 12px; color: #888; }
.site-nav { display: flex; gap: 6px; }
.nav-link { padding: 8px 16px; border-radius: 6px; color: #444; font-weight: 500; font-size: 15px; }
.nav-link:hover, .nav-link.active { background: #e8f0fe; color: #1a73e8; }
.btn-shop { white-space: nowrap; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: #333; border-radius: 2px; transition: 0.3s; }

/* ========== Hero ========== */
.hero { background: linear-gradient(135deg, #e8f0fe 0%, #f0f9ff 50%, #e0f2fe 100%); padding: 70px 0; overflow: hidden; }
.hero-inner { display: grid; grid-template-columns: 1.2fr 1fr; gap: 50px; align-items: center; }
.hero-badge { display: inline-block; background: #fff; color: #1a73e8; padding: 6px 16px; border-radius: 20px; font-size: 13px; font-weight: 600; margin-bottom: 20px; box-shadow: 0 2px 8px rgba(26,115,232,0.1); }
.hero-title { font-size: 40px; margin-bottom: 18px; color: #1a1a2e; }
.hero-subtitle { font-size: 17px; color: #555; margin-bottom: 30px; line-height: 1.8; }
.hero-actions { display: flex; gap: 16px; margin-bottom: 40px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 40px; }
.stat-item { display: flex; flex-direction: column; }
.stat-num { font-size: 28px; font-weight: 800; color: #1a73e8; }
.stat-label { font-size: 14px; color: #777; }
.hero-image-placeholder {
  background: #fff; border-radius: 16px; padding: 60px 20px;
  text-align: center; color: #aaa; box-shadow: 0 10px 40px rgba(0,0,0,0.08);
  display: flex; flex-direction: column; gap: 8px; align-items: center; justify-content: center;
  min-height: 320px;
}
.hero-image-placeholder span { font-size: 18px; color: #999; }
.hero-image-placeholder small { font-size: 12px; color: #ccc; }

/* ========== 适用人群 ========== */
.section-audience { background: #fafbfc; }
.audience-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.audience-card { background: #fff; padding: 32px 24px; border-radius: 12px; text-align: center; transition: transform 0.3s, box-shadow 0.3s; border: 1px solid #eee; }
.audience-card:hover { transform: translateY(-6px); box-shadow: 0 12px 30px rgba(0,0,0,0.08); }
.audience-icon { font-size: 40px; margin-bottom: 16px; }
.audience-card h3 { font-size: 18px; margin-bottom: 10px; }
.audience-card p { font-size: 14px; color: #666; line-height: 1.6; }

/* ========== 产品卡片 ========== */
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.product-card { background: #fff; border-radius: 12px; overflow: hidden; border: 1px solid #eee; transition: transform 0.3s, box-shadow 0.3s; display: flex; flex-direction: column; }
.product-card:hover { transform: translateY(-6px); box-shadow: 0 12px 30px rgba(0,0,0,0.1); }
.product-image { position: relative; aspect-ratio: 1; background: #f5f7fa; overflow: hidden; }
.product-image img { width: 100%; height: 100%; object-fit: cover; }
.product-placeholder { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; color: #bbb; font-size: 14px; }
.product-badge { position: absolute; top: 12px; left: 12px; background: #ff6b35; color: #fff; padding: 4px 12px; border-radius: 4px; font-size: 12px; font-weight: 600; }
.product-info { padding: 18px; flex: 1; display: flex; flex-direction: column; }
.product-title { font-size: 16px; margin-bottom: 8px; }
.product-title a { color: #1a1a2e; }
.product-title a:hover { color: #1a73e8; }
.product-desc { font-size: 13px; color: #777; margin-bottom: 12px; flex: 1; }
.product-meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.product-pressure { font-size: 12px; background: #e8f0fe; color: #1a73e8; padding: 3px 10px; border-radius: 4px; }
.product-price { font-size: 20px; font-weight: 800; color: #e53935; }
.product-actions { display: flex; gap: 8px; }
.product-actions .btn { flex: 1; }
.product-filters { display: flex; align-items: center; gap: 10px; margin-bottom: 30px; flex-wrap: wrap; }
.filter-label { font-size: 14px; color: #666; font-weight: 600; }
.filter-tag { padding: 6px 16px; border-radius: 20px; background: #f0f0f0; color: #555; font-size: 14px; transition: 0.2s; }
.filter-tag:hover, .filter-tag.active { background: #1a73e8; color: #fff; }

/* ========== 特色 ========== */
.section-features { background: #fafbfc; }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-item { background: #fff; padding: 30px; border-radius: 12px; border-left: 4px solid #1a73e8; transition: transform 0.3s; }
.feature-item:hover { transform: translateX(6px); }
.feature-icon { font-size: 32px; margin-bottom: 14px; }
.feature-item h3 { font-size: 18px; margin-bottom: 10px; }
.feature-item p { font-size: 14px; color: #666; line-height: 1.7; }

/* ========== 博客 ========== */
.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.blog-card { background: #fff; border-radius: 12px; overflow: hidden; border: 1px solid #eee; transition: transform 0.3s, box-shadow 0.3s; }
.blog-card:hover { transform: translateY(-6px); box-shadow: 0 12px 30px rgba(0,0,0,0.08); }
.blog-image { aspect-ratio: 16/10; background: #f0f6ff; overflow: hidden; }
.blog-image img { width: 100%; height: 100%; object-fit: cover; }
.blog-placeholder { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; font-size: 40px; }
.blog-info { padding: 22px; }
.blog-meta { display: flex; gap: 12px; margin-bottom: 10px; font-size: 13px; color: #999; }
.blog-category { background: #e8f0fe; color: #1a73e8; padding: 2px 10px; border-radius: 4px; }
.blog-title { font-size: 17px; margin-bottom: 10px; }
.blog-title a { color: #1a1a2e; }
.blog-title a:hover { color: #1a73e8; }
.blog-excerpt { font-size: 14px; color: #666; margin-bottom: 14px; line-height: 1.6; }
.blog-more { font-size: 14px; font-weight: 600; }
.blog-list { display: flex; flex-direction: column; gap: 28px; }
.blog-list-item { display: grid; grid-template-columns: 280px 1fr; gap: 28px; background: #fff; border-radius: 12px; overflow: hidden; border: 1px solid #eee; padding: 0; }
.blog-list-image { aspect-ratio: 16/10; background: #f0f6ff; overflow: hidden; }
.blog-list-image img { width: 100%; height: 100%; object-fit: cover; }
.blog-list-content { padding: 24px 24px 24px 0; display: flex; flex-direction: column; justify-content: center; }
.blog-list-title { font-size: 20px; margin-bottom: 10px; }
.blog-list-title a { color: #1a1a2e; }
.blog-list-title a:hover { color: #1a73e8; }
.blog-list-excerpt { font-size: 14px; color: #666; margin-bottom: 14px; line-height: 1.7; }

/* ========== CTA ========== */
.section-cta { background: linear-gradient(135deg, #1a73e8, #1565c0); padding: 60px 0; }
.cta-inner { text-align: center; color: #fff; }
.cta-inner h2 { font-size: 30px; margin-bottom: 12px; color: #fff; }
.cta-inner p { font-size: 16px; margin-bottom: 28px; opacity: 0.9; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.cta-inner .btn-outline { color: #fff; border-color: #fff; }
.cta-inner .btn-outline:hover { background: #fff; color: #1a73e8; }

/* ========== 单页 ========== */
.single-page { padding: 40px 0 70px; }
.breadcrumb { font-size: 14px; color: #999; margin-bottom: 24px; }
.breadcrumb a { color: #666; }
.breadcrumb a:hover { color: #1a73e8; }
.breadcrumb-current { color: #333; }
.single-header { margin-bottom: 36px; padding-bottom: 24px; border-bottom: 1px solid #eee; }
.single-title { font-size: 32px; margin-bottom: 14px; }
.single-meta { display: flex; gap: 16px; flex-wrap: wrap; font-size: 14px; color: #888; }
.meta-category, .meta-pressure { background: #e8f0fe; color: #1a73e8; padding: 3px 12px; border-radius: 4px; }
.single-content { font-size: 16px; line-height: 1.9; color: #333; }
.single-content h2 { font-size: 24px; margin: 36px 0 16px; padding-left: 12px; border-left: 4px solid #1a73e8; }
.single-content h3 { font-size: 20px; margin: 28px 0 12px; }
.single-content p { margin-bottom: 16px; }
.single-content ul, .single-content ol { margin: 16px 0; padding-left: 24px; }
.single-content ul { list-style: disc; }
.single-content ol { list-style: decimal; }
.single-content li { margin-bottom: 8px; }
.single-content img { border-radius: 8px; margin: 20px 0; }
.single-content blockquote { border-left: 4px solid #1a73e8; background: #f0f6ff; padding: 16px 20px; margin: 20px 0; border-radius: 0 8px 8px 0; color: #555; }
.single-content table { width: 100%; border-collapse: collapse; margin: 20px 0; }
.single-content th, .single-content td { border: 1px solid #ddd; padding: 10px 14px; text-align: left; }
.single-content th { background: #f0f6ff; font-weight: 600; }
.table-of-contents { background: #f8f9fa; border-radius: 8px; padding: 20px 24px; margin-bottom: 30px; border: 1px solid #eee; }
.table-of-contents h3 { font-size: 16px; margin-bottom: 12px; }
.table-of-contents ul { padding-left: 20px; list-style: disc; }
.table-of-contents li { margin-bottom: 6px; font-size: 14px; }
.single-tags { margin-top: 40px; padding-top: 20px; border-top: 1px solid #eee; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.tag { background: #f0f0f0; color: #555; padding: 4px 14px; border-radius: 16px; font-size: 13px; }
.tag:hover { background: #1a73e8; color: #fff; }
.single-pagination { display: flex; justify-content: space-between; margin-top: 30px; padding-top: 20px; border-top: 1px solid #eee; gap: 20px; flex-wrap: wrap; }
.single-pagination a { font-size: 14px; color: #555; max-width: 45%; }
.single-pagination a:hover { color: #1a73e8; }

/* 产品购买框 */
.product-buy-box { margin-top: 50px; background: linear-gradient(135deg, #f0f6ff, #e8f0fe); border-radius: 16px; padding: 36px; }
.buy-box-inner { display: grid; grid-template-columns: 1fr auto; gap: 30px; align-items: center; }
.buy-info h3 { font-size: 22px; margin-bottom: 10px; }
.buy-price { font-size: 32px; font-weight: 800; color: #e53935; margin-bottom: 14px; }
.buy-specs { font-size: 14px; color: #555; }
.buy-specs li { margin-bottom: 6px; padding-left: 18px; position: relative; }
.buy-specs li::before { content: "✓"; position: absolute; left: 0; color: #1a73e8; font-weight: 700; }
.buy-actions { display: flex; flex-direction: column; gap: 12px; align-items: stretch; min-width: 200px; }
.buy-note { font-size: 12px; color: #888; text-align: center; }

/* ========== 列表页 ========== */
.list-page { padding: 40px 0 70px; }
.list-header { margin-bottom: 36px; }
.list-title { font-size: 32px; margin-bottom: 12px; }
.list-description { color: #666; font-size: 15px; }
.generic-list { display: flex; flex-direction: column; gap: 20px; }
.generic-item { padding: 24px; background: #fff; border-radius: 10px; border: 1px solid #eee; }
.generic-item h3 { margin-bottom: 8px; }
.generic-item p { color: #666; font-size: 14px; }

/* ========== 页脚 ========== */
.site-footer { background: #1a1a2e; color: #aaa; padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-logo .logo-icon { width: 36px; height: 36px; font-size: 18px; }
.footer-logo .logo-name { color: #fff; font-size: 18px; }
.footer-desc { font-size: 14px; line-height: 1.7; margin-bottom: 18px; }
.footer-contact p { font-size: 13px; margin-bottom: 6px; }
.footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 18px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col a { color: #aaa; font-size: 14px; }
.footer-col a:hover { color: #4fc3f7; }
.footer-disclaimer { background: rgba(255,255,255,0.05); padding: 18px 24px; border-radius: 8px; margin-bottom: 24px; font-size: 13px; line-height: 1.7; color: #999; }
.footer-disclaimer strong { color: #ffc107; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 20px 0; text-align: center; font-size: 13px; color: #888; }
.footer-bottom a { color: #888; }
.footer-bottom a:hover { color: #4fc3f7; }

/* ========== 分页 ========== */
.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 40px; }
.pagination .page-item a, .pagination .page-item span {
  display: inline-block; padding: 8px 14px; border-radius: 6px;
  border: 1px solid #ddd; font-size: 14px; color: #555;
}
.pagination .page-item.active a, .pagination .page-item.active span { background: #1a73e8; color: #fff; border-color: #1a73e8; }
.pagination .page-item a:hover { border-color: #1a73e8; color: #1a73e8; }

/* ========== 响应式 ========== */
@media (max-width: 992px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-image { order: -1; }
  .audience-grid, .product-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid, .blog-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .blog-list-item { grid-template-columns: 200px 1fr; }
}
@media (max-width: 768px) {
  .section { padding: 50px 0; }
  .section-title { font-size: 26px; }
  .hero-title { font-size: 30px; }
  .hero-stats { gap: 24px; }
  .site-nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: #fff; flex-direction: column; padding: 16px; box-shadow: 0 8px 20px rgba(0,0,0,0.1); }
  .site-nav.open { display: flex; }
  .nav-toggle { display: flex; }
  .btn-shop { display: none; }
  .audience-grid, .product-grid, .features-grid, .blog-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .blog-list-item { grid-template-columns: 1fr; }
  .blog-list-content { padding: 20px; }
  .buy-box-inner { grid-template-columns: 1fr; }
  .buy-actions { min-width: auto; }
  .single-title { font-size: 26px; }
  .header-top-inner { justify-content: center; text-align: center; }
}

/* ========== 微信弹窗 ========== */
.wechat-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  align-items: center;
  justify-content: center;
}
.wechat-modal.show {
  display: flex;
}
.wechat-modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}
.wechat-modal-content {
  position: relative;
  background: #fff;
  border-radius: 16px;
  padding: 36px 32px 28px;
  max-width: 360px;
  width: 90%;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  animation: modalPop 0.3s ease;
}
@keyframes modalPop {
  from { transform: scale(0.85); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
.wechat-modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  font-size: 24px;
  color: #999;
  cursor: pointer;
  line-height: 1;
  padding: 4px 8px;
  border-radius: 4px;
  transition: 0.2s;
}
.wechat-modal-close:hover {
  color: #333;
  background: #f5f5f5;
}
.wechat-modal-title {
  font-size: 20px;
  font-weight: 700;
  color: #1a1a2e;
  margin-bottom: 6px;
}
.wechat-modal-subtitle {
  font-size: 14px;
  color: #888;
  margin-bottom: 20px;
}
.wechat-modal-qrcode {
  width: 200px;
  height: 200px;
  margin: 0 auto 16px;
  border-radius: 8px;
  overflow: hidden;
  border: 2px solid #f0f0f0;
}
.wechat-modal-qrcode img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.wechat-modal-id {
  font-size: 16px;
  color: #1a73e8;
  font-weight: 600;
  margin-bottom: 8px;
  background: #f0f6ff;
  padding: 8px 16px;
  border-radius: 6px;
  display: inline-block;
}
.wechat-modal-tip {
  font-size: 13px;
  color: #999;
  line-height: 1.6;
}