:root {
      --color-primary: #2D3436;
      --color-secondary: #636E72;
      --color-accent: #E17055;
      --color-accent-light: #FAB1A0;
      --color-background: #FAFAFA;
      --color-surface: #FFFFFF;
      --color-border: #E8E8E8;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
      --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
      --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --transition: cubic-bezier(0.4, 0, 0.2, 1);
    }
    * { margin: 0; padding: 0; box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body { font-family: 'Noto Sans SC', sans-serif; background: var(--color-background); color: var(--color-primary); line-height: 1.6; overflow-x: hidden; }

    .navbar { border-bottom: 1px solid rgba(0,0,0,0.05); }
    .logo { font-family: 'Noto Serif SC', serif; letter-spacing: 0.05em; }
    .menu-overlay { background: rgba(0,0,0,0.3); }

    .page-header { margin-top: 64px; padding: 60px 20px 40px; background: linear-gradient(135deg, #FFF5F3 0%, #FFF9F5 100%); text-align: center; }
    .page-title { font-family: 'Noto Serif SC', serif; font-size: clamp(2rem, 5vw, 3rem); font-weight: 600; margin-bottom: 12px; }
    .page-subtitle { color: var(--color-secondary); font-size: 1rem; }

    .filter-section { padding: 24px 20px; max-width: 1200px; margin: 0 auto; display: flex; gap: 12px; overflow-x: auto; justify-content: center; flex-wrap: wrap; }
    .filter-btn { padding: 10px 24px; border: 1px solid var(--color-border); background: var(--color-surface); border-radius: 50px; font-size: 0.9rem; cursor: pointer; white-space: nowrap; transition: all 0.3s var(--transition); }
    .filter-btn:hover, .filter-btn.active { background: var(--color-accent); color: white; border-color: var(--color-accent); }

    .products-section { padding: 20px; max-width: 1200px; margin: 0 auto; }
    .product-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .product-card { background: var(--color-surface); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); transition: all 0.4s var(--transition); text-decoration: none; color: inherit; opacity: 0; transform: translateY(20px); }
    .product-card.visible { opacity: 1; transform: translateY(0); }
    .product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
    .product-img { aspect-ratio: 1; background: linear-gradient(135deg, #F8F8F8, #EFEFEF); display: flex; align-items: center; justify-content: center; font-size: 4rem; position: relative; overflow: hidden; transition: transform 0.5s var(--transition); }
    .product-img::before { content: ''; position: absolute; inset: 0; background: linear-gradient(45deg, var(--color-accent-light) 0%, transparent 50%); opacity: 0.3; }
    .product-card:hover .product-img { transform: scale(1.08); }
    .product-info { padding: 16px; }
    .product-name { font-weight: 500; font-size: 0.95rem; margin-bottom: 8px; line-height: 1.4; }
    .product-meta { display: flex; justify-content: space-between; align-items: center; }
    .product-price { font-family: 'DM Sans', sans-serif; font-size: 1.125rem; font-weight: 700; color: var(--color-accent); }
    .product-tag { font-size: 0.75rem; padding: 4px 10px; background: var(--color-background); border-radius: 20px; color: var(--color-secondary); }

    .load-more { text-align: center; padding: 40px 20px 60px; }
    .load-more-btn { padding: 14px 48px; background: var(--color-primary); color: white; border: none; border-radius: var(--radius-sm); font-size: 1rem; cursor: pointer; transition: all 0.3s var(--transition); }
    .load-more-btn:hover { background: var(--color-accent); transform: translateY(-2px); }

    .footer { background: var(--color-primary); color: rgba(255,255,255,0.8); padding: 48px 20px 32px; }
    .footer-content { max-width: 800px; margin: 0 auto; text-align: center; }
    .footer-logo { font-family: 'Noto Serif SC', serif; font-size: 1.5rem; font-weight: 600; color: white; margin-bottom: 24px; }
    .footer-logo span { color: var(--color-accent-light); }
    .footer-links { display: flex; justify-content: center; flex-wrap: wrap; gap: 24px; margin-bottom: 32px; }
    .footer-links a { color: rgba(255,255,255,0.7); text-decoration: none; font-size: 0.9rem; transition: color 0.3s; }
    .footer-links a:hover { color: var(--color-accent-light); }
    .footer-divider { width: 60px; height: 1px; background: rgba(255,255,255,0.2); margin: 0 auto 24px; }
    .footer-copy { font-size: 0.85rem; opacity: 0.6; }

    @media (min-width: 768px) { .product-grid { grid-template-columns: repeat(3, 1fr); gap: 24px; } .products-section { padding: 40px; } }
    @media (min-width: 1024px) { .product-grid { grid-template-columns: repeat(4, 1fr); } }

    /* ===== 微信风格底部导航 ===== */
    .bottom-nav {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      height: 60px;
      background: #FFFFFF;
      border-top: 1px solid #E5E5E5;
      z-index: 1000;
      padding-bottom: env(safe-area-inset-bottom, 0);
    }
    .bottom-nav-inner {
      display: flex;
      justify-content: space-around;
      align-items: center;
      height: 100%;
      max-width: 500px;
      margin: 0 auto;
    }
    .bottom-nav-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 4px;
      color: #999;
      text-decoration: none;
      font-size: 10px;
      transition: color 0.3s;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px 16px;
    }
    .bottom-nav-item.active,
    .bottom-nav-item:hover {
      color: var(--color-accent);
    }
    .bottom-nav-item .nav-icon {
      font-size: 20px;
      line-height: 1;
    }

    /* Popover 二维码弹窗 */
    .popover-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,0.5);
      z-index: 2000;
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s;
    }
    .popover-overlay.show {
      opacity: 1;
      visibility: visible;
    }
    .popover-box {
      position: fixed;
      bottom: 70px;
      left: 50%;
      transform: translateX(-50%) translateY(20px);
      background: #FFFFFF;
      border-radius: 16px;
      padding: 24px;
      z-index: 2001;
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      text-align: center;
      box-shadow: 0 8px 40px rgba(0,0,0,0.2);
    }
    .popover-overlay.show + .popover-box,
    .popover-box.show {
      opacity: 1;
      visibility: visible;
      transform: translateX(-50%) translateY(0);
    }
    .popover-qr {
      width: 160px;
      height: 160px;
      background: linear-gradient(135deg, #F8F8F8, #EFEFEF);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 60px;
      margin-bottom: 12px;
    }
    .popover-title {
      font-size: 14px;
      font-weight: 500;
      color: #333;
    }
    .popover-tip {
      font-size: 12px;
      color: #999;
      margin-top: 4px;
    }

    @media (max-width: 768px) {
      .bottom-nav { display: block; }
      .footer { display: none; }
      .products-section { padding-bottom: 80px; }
      body { padding-bottom: 60px; }
      .popover-box { bottom: 130px; }
    }

    /* ===== 关于我们弹窗 ===== */
    .about-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,0.5);
      z-index: 2000;
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s;
    }
    .about-overlay.show {
      opacity: 1;
      visibility: visible;
    }
    .about-modal {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: #FFFFFF;
      z-index: 2001;
      transform: translateY(100%);
      transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
      overflow-y: auto;
      -webkit-overflow-scrolling: touch;
    }
    .about-modal.show {
      transform: translateY(0);
    }
    .about-header {
      position: sticky;
      top: 0;
      background: #FFFFFF;
      padding: 16px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid #E5E5E5;
    }
    .about-header h2 {
      font-family: 'Noto Serif SC', serif;
      font-size: 1.125rem;
      font-weight: 600;
    }
    .about-close {
      width: 32px;
      height: 32px;
      border: none;
      background: #F5F5F5;
      border-radius: 50%;
      font-size: 18px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .about-content {
      padding: 40px 24px 60px;
      text-align: center;
    }
    .about-logo {
      font-family: 'Noto Serif SC', serif;
      font-size: 2rem;
      font-weight: 600;
      color: var(--color-primary);
      margin-bottom: 8px;
    }
    .about-logo span { color: var(--color-accent); }
    .about-tagline {
      color: var(--color-secondary);
      font-size: 0.95rem;
      margin-bottom: 32px;
    }
    .about-desc {
      text-align: left;
      margin-bottom: 32px;
    }
    .about-desc p {
      color: #666;
      font-size: 0.9rem;
      line-height: 1.8;
      margin-bottom: 16px;
    }
    .about-stats {
      display: flex;
      justify-content: space-around;
      padding: 24px 0;
      border-top: 1px solid #F0F0F0;
      border-bottom: 1px solid #F0F0F0;
      margin-bottom: 32px;
    }
    .stat-item {
      display: flex;
      flex-direction: column;
      align-items: center;
    }
    .stat-num {
      font-family: 'DM Sans', sans-serif;
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--color-accent);
    }
    .stat-label {
      font-size: 0.75rem;
      color: #999;
      margin-top: 4px;
    }
    .about-values {
      display: flex;
      justify-content: center;
      gap: 12px;
      flex-wrap: wrap;
      margin-bottom: 32px;
    }
    .value-item {
      padding: 10px 16px;
      background: #FFF8F6;
      border-radius: 20px;
      font-size: 0.85rem;
      color: var(--color-primary);
    }
    .about-contact {
      text-align: left;
      background: #FAFAFA;
      border-radius: 12px;
      padding: 20px;
    }
    .about-contact p {
      font-size: 0.9rem;
      color: #666;
      margin-bottom: 8px;
    }
    .about-contact p:last-child { margin-bottom: 0; }
/* 底部导航自定义图片图标（后台可配置） */
.bottom-nav-item .nav-icon-img { width: 24px; height: 24px; object-fit: contain; vertical-align: middle; }