:root {
      --color-primary: #1E3A5F;
      --color-secondary: #2C3E50;
      --color-accent: #3498DB;
      --color-accent-light: #E8F4FC;
      --color-background: #F8FAFC;
      --color-surface: #FFFFFF;
      --color-border: #E1E8ED;
      --shadow-sm: 0 1px 4px rgba(30,58,95,0.06);
      --shadow-md: 0 2px 12px rgba(30,58,95,0.1);
      --shadow-lg: 0 4px 24px rgba(30,58,95,0.15);
      --radius-sm: 4px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --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-secondary); line-height: 1.6; overflow-x: hidden; padding-top: calc(64px + env(safe-area-inset-top, 0px)); }

    /* 商务简约主题导航样式 */
    .navbar { border-bottom: 1px solid var(--color-border); }
    .logo { display: flex; align-items: center; gap: 8px; }
    .menu-overlay { background: rgba(30,58,95,0.2); }

    .hero { margin-top: 0; position: relative; overflow: hidden; }
    .carousel { position: relative; width: 100%; }
    .carousel-track { display: flex; transition: transform 0.6s var(--transition); }
    .carousel-slide { min-width: 100%; aspect-ratio: 3/2; display: flex; align-items: center; justify-content: center; padding: 40px 20px; text-align: center; }
    .carousel-slide:nth-child(1) { background: linear-gradient(135deg, #E8F0F8 0%, #F0F5FA 100%); }
    .carousel-slide:nth-child(2) { background: linear-gradient(135deg, #E8F8F0 0%, #F0FAF5 100%); }
    .carousel-slide:nth-child(3) { background: linear-gradient(135deg, #F8E8F0 0%, #FAF5F0 100%); }
    .slide-content { max-width: 500px; }
    .slide-tag { display: inline-block; padding: 6px 16px; background: var(--color-accent); color: white; font-size: 0.75rem; font-weight: 500; border-radius: 4px; margin-bottom: 20px; }
    .slide-title { font-size: clamp(1.75rem, 5vw, 2.5rem); font-weight: 600; line-height: 1.3; margin-bottom: 16px; color: var(--color-primary); }
    .slide-desc { color: var(--color-secondary); font-size: 1rem; margin-bottom: 28px; }
    .slide-cta { display: inline-flex; align-items: center; gap: 8px; padding: 14px 32px; background: var(--color-primary); color: white; text-decoration: none; font-weight: 500; border-radius: var(--radius-sm); transition: all 0.3s var(--transition); }
    .slide-cta:hover { background: var(--color-accent); }
    .carousel-arrow { position: absolute; top: 50%; transform: translateY(-50%); width: 48px; height: 48px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-sm); cursor: pointer; display: flex; align-items: center; justify-content: center; transition: all 0.3s var(--transition); z-index: 10; }
    .carousel-arrow:hover { border-color: var(--color-accent); color: var(--color-accent); }
    .carousel-arrow.prev { left: 16px; }
    .carousel-arrow.next { right: 16px; }
    .carousel-dots { position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%); display: flex; gap: 10px; z-index: 10; }
    .carousel-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--color-border); border: none; cursor: pointer; transition: all 0.3s var(--transition); }
    .carousel-dot.active { background: var(--color-accent); width: 28px; border-radius: 5px; }

    .section { padding: 60px 20px; max-width: 1200px; margin: 0 auto; }
    .section-header { text-align: center; margin-bottom: 40px; }
    .section-title { font-size: clamp(1.5rem, 4vw, 2rem); font-weight: 600; margin-bottom: 12px; color: var(--color-primary); }
    .section-subtitle { color: var(--color-secondary); font-size: 0.95rem; }
    .section-title::after { content: ''; display: block; width: 60px; height: 3px; background: var(--color-accent); margin: 16px auto 0; }

    .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); border: 1px solid var(--color-border); transition: all 0.4s var(--transition); text-decoration: none; color: inherit; }
    .product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--color-accent); }
    .product-img { aspect-ratio: 1; background: linear-gradient(135deg, #F4F7FA, #EDF2F7); display: flex; align-items: center; justify-content: center; font-size: 3rem; overflow: hidden; }
    .product-img img { width: 100%; height: 100%; object-fit: cover; display: block; }
    .product-info { padding: 16px; }
    .product-name { font-weight: 500; font-size: 0.95rem; margin-bottom: 8px; line-height: 1.4; }
    .product-price { font-family: 'DM Sans', sans-serif; font-size: 1.125rem; font-weight: 700; color: var(--color-accent); }

    .contact-item { display: flex; align-items: center; justify-content: center; gap: 10px; color: var(--color-secondary); font-size: 0.95rem; }
    #addressItem { cursor: pointer; transition: opacity 0.2s; }
    #addressItem:hover { opacity: 0.7; }
    #addressItem:active { opacity: 0.5; }

    .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-size: 1.5rem; font-weight: 600; color: white; margin-bottom: 24px; letter-spacing: 0.05em; }
    .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; }
    .footer-links a:hover { color: var(--color-accent); }
    .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; }
    .footer-support { font-size: 0.85rem; opacity: 0.6; }
    .footer-support a { color: inherit; text-decoration: none; }
    .footer-support a:hover { text-decoration: underline; }

    .about-section { display: flex; align-items: center; gap: 60px; max-width: 1200px; margin: 0 auto; padding: 80px 48px; }
    .about-container { flex: 1; }
    .about-badge { display: inline-block; padding: 6px 16px; background: var(--color-accent-light); color: var(--color-accent); font-size: 0.75rem; font-weight: 500; border-radius: var(--radius-sm); margin-bottom: 20px; }
    .about-title { font-size: clamp(1.75rem, 4vw, 2.5rem); font-weight: 600; margin-bottom: 20px; color: var(--color-primary); }
    .about-text { color: var(--color-secondary); font-size: 1rem; line-height: 1.8; margin-bottom: 32px; }
    .about-highlights { display: flex; gap: 24px; margin-bottom: 32px; }
    .highlight-item { display: flex; align-items: center; gap: 8px; }
    .highlight-label { font-size: 0.9rem; font-weight: 500; color: var(--color-primary); }
    .about-cta { display: inline-flex; align-items: center; gap: 8px; color: var(--color-accent); font-weight: 500; text-decoration: none; }
    .about-image { width: 300px; height: 300px; background: linear-gradient(135deg, #E8F4FC 0%, #F0F5FA 100%); border-radius: var(--radius-lg); display: flex; align-items: center; justify-content: center; font-size: 8rem; flex-shrink: 0; }

    .contact-section { background: linear-gradient(180deg, #FFFFFF 0%, #E8F4FC 100%); padding: 80px 20px 100px; clear: both; display: flex; align-items: center; justify-content: center; }
    .contact-card { width: 100%; max-width: 500px; text-align: center; background: var(--color-surface); border-radius: var(--radius-lg); padding: 48px 32px; box-shadow: var(--shadow-md); border: 1px solid var(--color-border); }
    .qrcode-wrapper { width: 160px; height: 160px; margin: 0 auto 28px; background: var(--color-background); border-radius: var(--radius-md); padding: 12px; border: 1px solid var(--color-border); display: flex; align-items: center; justify-content: center; font-size: 6rem; overflow: hidden; }
    .qrcode-wrapper img { max-width: 100%; max-height: 100%; width: auto; height: auto; display: block; object-fit: contain; }
    .contact-title { font-size: 1.5rem; margin-bottom: 8px; color: var(--color-primary); }
    .contact-desc { color: var(--color-secondary); margin-bottom: 24px; font-size: 0.95rem; }
    .contact-info { display: flex; flex-direction: column; gap: 12px; margin-bottom: 28px; }
    .contact-item { display: flex; align-items: center; justify-content: center; gap: 10px; color: var(--color-secondary); font-size: 0.95rem; }
    .social-links { display: flex; justify-content: center; gap: 16px; }
    .social-link { width: 44px; height: 44px; border-radius: var(--radius-sm); background: var(--color-background); display: flex; align-items: center; justify-content: center; color: var(--color-secondary); text-decoration: none; transition: all 0.3s var(--transition); border: 1px solid var(--color-border); }
    .social-link:hover { border-color: var(--color-accent); color: var(--color-accent); }

    @media (min-width: 768px) { .product-grid { grid-template-columns: repeat(4, 1fr); gap: 24px; } .section { padding: 80px 48px; } .carousel-slide { aspect-ratio: 16/8; } }
    @media (max-width: 900px) { .about-section { flex-direction: column; padding: 60px 24px; text-align: center; } .about-image { width: 200px; height: 200px; font-size: 5rem; } .about-highlights { justify-content: center; } }
    @media (max-width: 768px) { .carousel-arrow { display: none; } .contact-card { padding: 32px 20px; } body { padding-bottom: 60px; } .popover-box { bottom: 130px; } }

    .bottom-nav { display: none; position: fixed; bottom: 0; left: 0; right: 0; height: 60px; background: #FFFFFF; border-top: 1px solid var(--color-border); 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; }
    .popover-overlay { position: fixed; inset: 0; background: rgba(30,58,95,0.5); 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: var(--radius-md); padding: 24px; z-index: 2001; opacity: 0; visibility: hidden; transition: all 0.3s; text-align: center; box-shadow: var(--shadow-lg); border: 1px solid var(--color-border); }
    .popover-overlay.show + .popover-box, .popover-box.show { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
    .popover-qr { width: 160px; height: 160px; background: var(--color-background); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-size: 60px; margin-bottom: 12px; border: 1px solid var(--color-border); }
    .popover-title { font-size: 14px; font-weight: 500; color: var(--color-primary); }
    .popover-tip { font-size: 12px; color: #999; margin-top: 4px; }
    @media (max-width: 768px) { .bottom-nav { display: block; } .footer { display: none; } }
/* 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; }