: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;
      padding-top: calc(64px + env(safe-area-inset-top, 0px));
    }

    /* 柔和极简主题导航样式 */
    .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); }

    /* ===== Hero Banner ===== */
    .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, #FFF5F3 0%, #FFE8E3 100%); }
    .carousel-slide:nth-child(2) { background: linear-gradient(135deg, #F0F5FF 0%, #E8F0FE 100%); }
    .carousel-slide:nth-child(3) { background: linear-gradient(135deg, #F5FFF8 0%, #E8F5EC 100%); }

    .slide-content { max-width: 500px; animation: fadeInUp 0.8s var(--transition) both; }
    @keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }

    .slide-tag {
      display: inline-block; padding: 6px 16px; background: var(--color-accent);
      color: white; font-size: 0.75rem; font-weight: 500;
      border-radius: 20px; margin-bottom: 20px; letter-spacing: 0.1em;
    }
    .slide-title {
      font-family: 'Noto Serif SC', serif;
      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); transform: translateY(-2px); box-shadow: var(--shadow-md); }

    .carousel-arrow {
      position: absolute; top: 50%; transform: translateY(-50%);
      width: 48px; height: 48px; background: var(--color-surface);
      border: none; border-radius: 50%; cursor: pointer;
      display: flex; align-items: center; justify-content: center;
      box-shadow: var(--shadow-md); transition: all 0.3s var(--transition); z-index: 10;
    }
    .carousel-arrow:hover { background: var(--color-accent); color: white; }
    .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; }

    /* ===== 产品推荐 ===== */
    .section { padding: 60px 20px; max-width: 1200px; margin: 0 auto; }
    .section-header { text-align: center; margin-bottom: 40px; }
    .section-title {
      font-family: 'Noto Serif SC', serif;
      font-size: clamp(1.5rem, 4vw, 2rem); font-weight: 600; margin-bottom: 12px;
    }
    .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; border-radius: 2px;
    }

    .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: 3rem; overflow: hidden; position: relative;
    }
    .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-img { transition: transform 0.5s var(--transition); }
    .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; display: -webkit-box;
      -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
    }
    .product-price {
      font-family: 'DM Sans', sans-serif; font-size: 1.125rem;
      font-weight: 700; color: var(--color-accent);
    }

    /* ===== 联系区域 ===== */
    .contact-section { background: linear-gradient(180deg, #FFFFFF 0%, #FFF8F6 100%); padding: 80px 20px; }
    .contact-card {
      max-width: 500px; margin: 0 auto; text-align: center;
      background: var(--color-surface); border-radius: var(--radius-lg);
      padding: 48px 32px; box-shadow: var(--shadow-md);
    }
    .qrcode-wrapper {
      width: 160px; height: 160px; margin: 0 auto 28px;
      background: var(--color-surface); border-radius: var(--radius-md);
      padding: 12px; box-shadow: var(--shadow-sm); border: 1px solid var(--color-border);
      display: flex; align-items: center; justify-content: center;
      font-size: 6rem;
    }
    .contact-title { font-family: 'Noto Serif SC', serif; font-size: 1.5rem; margin-bottom: 8px; }
    .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;
    }
    #addressItem { cursor: pointer; transition: opacity 0.2s; }
    #addressItem:hover { opacity: 0.7; }
    #addressItem:active { opacity: 0.5; }
    .contact-item svg { width: 20px; height: 20px; color: var(--color-accent); }
    .social-links { display: flex; justify-content: center; gap: 16px; }
    .social-link {
      width: 44px; height: 44px; border-radius: 50%;
      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);
    }
    .social-link:hover { background: var(--color-accent); color: white; transform: translateY(-3px); }

    /* ===== 底部菜单 ===== */
    .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; }
    .footer-support { font-size: 0.85rem; opacity: 0.6; }
    .footer-support a { color: inherit; text-decoration: none; }
    .footer-support a:hover { text-decoration: underline; }

    /* ===== 动画 ===== */
    .fade-in { opacity: 0; transform: translateY(20px); transition: opacity 0.6s var(--transition), transform 0.6s var(--transition); }
    .fade-in.visible { opacity: 1; transform: translateY(0); }

    .qrcode-wrapper img { max-width: 100%; max-height: 100%; width: auto; height: auto; display: block; object-fit: contain; }

    /* ===== 响应式 ===== */
    @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: 480px) {
      .carousel-arrow { display: none; }
      .contact-card { padding: 32px 20px; }
    }

    /* ===== 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 svg {
      width: 24px;
      height: 24px;
      fill: currentColor;
    }
    .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; }
      body { padding-bottom: 60px; }
      .popover-box { bottom: 130px; }
      .contact-section { padding-bottom: 100px; }
    }

    /* ===== 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; }

    /* ===== 企业简介 ===== */
    .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: 20px;
      margin-bottom: 20px;
    }
    .about-title {
      font-family: 'Noto Serif SC', serif;
      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-icon {
      font-size: 1.25rem;
    }
    .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;
      transition: gap 0.3s;
    }
    .about-cta:hover {
      gap: 12px;
    }
    .about-image {
      width: 300px;
      height: 300px;
      background: linear-gradient(135deg, #FFF5F3 0%, #FFE8E3 100%);
      border-radius: var(--radius-lg);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 8rem;
      flex-shrink: 0;
    }

    @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;
      }
    }
/* 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; }