*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    :root {
      --primary: #FF5722;
      --primary-light: #FF8A65;
      --primary-dark: #E64A19;
      --secondary: #FF9800;
      --dark: #1A1A1A;
      --gray-900: #212121;
      --gray-700: #616161;
      --gray-500: #757575;
      --gray-400: #9E9E9E;
      --gray-300: #E0E0E0;
      --gray-100: #F7F7F8;
      --white: #FFFFFF;
      --nav-h: 64px;
      --radius: 14px;
      --section-py: 100px;
    }
    html { scroll-behavior: smooth; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
      background: var(--white);
      color: var(--gray-900);
      line-height: 1.7;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }
    a { text-decoration: none; color: inherit; }
    img { max-width: 100%; display: block; }
    .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

    /* ===== 导航栏 ===== */
    nav {
      position: fixed;
      top: 0; left: 0; right: 0;
      height: var(--nav-h);
      z-index: 1000;
      background: rgba(255,255,255,0.82);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      transition: box-shadow 0.3s;
    }
    nav.scrolled { box-shadow: 0 1px 12px rgba(0,0,0,0.06); }
    .nav-inner {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
      height: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .nav-logo {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .nav-logo img { height: 34px; width: auto; }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 36px;
      list-style: none;
    }
    .nav-links a {
      font-size: 0.92rem;
      color: var(--gray-700);
      font-weight: 500;
      transition: color 0.2s;
    }
    .nav-links a:hover { color: var(--primary); }
    .nav-cta {
      padding: 8px 22px !important;
      background: var(--primary) !important;
      color: var(--white) !important;
      border-radius: 8px;
      font-weight: 600 !important;
      transition: background 0.2s !important;
      box-shadow: 0 2px 8px rgba(255,87,34,0.2);
    }
    .nav-cta:hover { background: var(--primary-dark) !important; }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      padding: 6px;
    }
    .hamburger span {
      width: 22px; height: 2px;
      background: var(--dark);
      border-radius: 2px;
      transition: all 0.3s;
    }

    /* ===== HERO ===== */
    .hero {
      padding: calc(var(--nav-h) + 80px) 0 100px;
      background: linear-gradient(165deg, #FFF5F2 0%, #FFFFFF 50%, #FFF9F0 100%);
      position: relative;
    }
    .hero-inner {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: rgba(255,87,34,0.08);
      border: 1px solid rgba(255,87,34,0.15);
      border-radius: 100px;
      font-size: 0.82rem;
      color: var(--primary);
      font-weight: 500;
      margin-bottom: 24px;
    }
    .badge-dot {
      width: 6px; height: 6px;
      background: var(--primary);
      border-radius: 50%;
      animation: blink 2s ease infinite;
    }
    @keyframes blink { 0%,100%{opacity:1;}50%{opacity:0.3;} }
    .hero h1 {
      font-size: clamp(2rem, 4.5vw, 3.2rem);
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: -0.02em;
      color: var(--dark);
      margin-bottom: 20px;
    }
    .hero h1 .accent-text {
      color: var(--primary);
    }
    .hero-sub {
      font-size: clamp(0.95rem, 1.2vw, 1.08rem);
      color: var(--gray-700);
      max-width: 500px;
      margin-bottom: 36px;
      line-height: 1.8;
    }
    .hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
    .btn-primary {
      padding: 13px 32px;
      background: var(--primary);
      color: var(--white);
      border-radius: 10px;
      font-size: 0.95rem;
      font-weight: 600;
      cursor: pointer;
      border: none;
      transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
      box-shadow: 0 4px 16px rgba(255,87,34,0.25);
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-1px);
      box-shadow: 0 6px 24px rgba(255,87,34,0.3);
    }
    .btn-outline {
      padding: 13px 32px;
      background: var(--white);
      color: var(--gray-900);
      border-radius: 10px;
      font-size: 0.95rem;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid var(--gray-300);
      transition: border-color 0.2s, background 0.2s;
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    /* Hero 右侧 */
    .hero-visual {
      display: flex;
      justify-content: center;
      align-items: center;
      position: relative;
    }
    .hero-phone {
      position: relative;
      width: 280px;
      border-radius: 28px;
      overflow: hidden;
      border: 6px solid var(--gray-100);
      box-shadow: 0 20px 60px rgba(0,0,0,0.1), 0 0 0 1px rgba(0,0,0,0.04);
      background: #f5f5f5;
    }
    .hero-phone img { width: 100%; height: auto; display: block; }
    .float-tag {
      position: absolute;
      padding: 8px 16px;
      background: var(--white);
      border: 1px solid var(--gray-300);
      border-radius: 10px;
      font-size: 0.78rem;
      font-weight: 600;
      white-space: nowrap;
      box-shadow: 0 4px 16px rgba(0,0,0,0.08);
      animation: tagFloat 3s ease-in-out infinite;
    }
    .float-tag .tag-dot {
      display: inline-block;
      width: 6px; height: 6px;
      border-radius: 50%;
      margin-right: 6px;
    }
    .float-tag-1 { top: 8%; right: -36px; animation-delay: 0s; }
    .float-tag-1 .tag-dot { background: #4CAF50; }
    .float-tag-2 { bottom: 18%; left: -46px; animation-delay: 1.5s; }
    .float-tag-2 .tag-dot { background: var(--primary); }
    .float-tag-3 { top: 48%; right: -52px; animation-delay: 0.8s; }
    .float-tag-3 .tag-dot { background: var(--secondary); }
    @keyframes tagFloat {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-8px); }
    }

    /* ===== 数据条 ===== */
    .stats-section {
      background: var(--gray-100);
      border-top: 1px solid var(--gray-300);
      border-bottom: 1px solid var(--gray-300);
    }
    .stats-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      padding: 48px 0;
    }
    .stat-item { text-align: center; }
    .stat-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.02em;
    }
    .stat-label { font-size: 0.82rem; color: var(--gray-500); margin-top: 6px; }

    /* ===== 通用 section ===== */
    section { padding: var(--section-py) 0; }
    .section-label {
      display: inline-block;
      padding: 5px 16px;
      background: rgba(255,87,34,0.07);
      border-radius: 100px;
      font-size: 0.78rem;
      color: var(--primary);
      font-weight: 600;
      margin-bottom: 16px;
      letter-spacing: 0.02em;
    }
    .section-title {
      font-size: clamp(1.6rem, 3vw, 2.2rem);
      font-weight: 800;
      line-height: 1.3;
      letter-spacing: -0.02em;
      color: var(--dark);
      margin-bottom: 16px;
    }
    .section-desc {
      color: var(--gray-500);
      font-size: 0.96rem;
      max-width: 560px;
      line-height: 1.8;
    }
    .section-header { margin-bottom: 52px; }
    .section-header.center { text-align: center; }
    .section-header.center .section-desc { margin: 0 auto; }

    /* ===== 产品介绍 ===== */
    #products { background: var(--gray-100); }
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .product-card {
      background: var(--white);
      border-radius: var(--radius);
      padding: 30px 26px;
      transition: transform 0.3s, box-shadow 0.3s;
      position: relative;
      overflow: hidden;
      box-shadow: 0 1px 2px rgba(0,0,0,0.04);
    }
    .product-card::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 3px;
      background: linear-gradient(90deg, var(--primary), var(--secondary));
      opacity: 0;
      transition: opacity 0.3s;
    }
    .product-card:hover {
      transform: translateY(-3px);
      box-shadow: 0 10px 28px rgba(255,87,34,0.08);
    }
    .product-card:hover::before { opacity: 1; }
    .product-icon {
      width: 44px; height: 44px;
      border-radius: 12px;
      display: flex; align-items: center; justify-content: center;
      font-size: 1.3rem;
      margin-bottom: 18px;
      background: rgba(255,87,34,0.07);
    }
    .product-card h3 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 8px;
    }
    .product-card p {
      color: var(--gray-500);
      font-size: 0.85rem;
      line-height: 1.7;
    }

    /* ===== 荣誉资质 ===== */
    .honors-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .honor-card {
      background: var(--gray-100);
      border-radius: var(--radius);
      padding: 32px 20px;
      text-align: center;
      transition: transform 0.3s, box-shadow 0.3s;
    }
    .honor-card:hover {
      transform: translateY(-3px);
      box-shadow: 0 8px 28px rgba(0,0,0,0.06);
      background: var(--white);
    }
    .honor-icon {
      width: 52px; height: 52px;
      border-radius: 14px;
      display: flex; align-items: center; justify-content: center;
      font-size: 1.4rem;
      margin: 0 auto 16px;
      background: rgba(255,87,34,0.07);
    }
    .honor-card h3 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 8px;
    }
    .honor-card p { color: var(--gray-500); font-size: 0.8rem; line-height: 1.6; }

    /* ===== 关于我们 ===== */
    .about-content { max-width: 820px; margin: 0 auto; text-align: left; }
    .about-content .section-label { display: inline-block; }
    .about-content .section-desc { max-width: none; margin: 0 0 32px; color: var(--gray-700); }
    .about-features {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 40px;
    }
    .about-feature {
      background: var(--gray-100);
      border-radius: var(--radius);
      padding: 20px 18px;
      text-align: left;
      transition: transform 0.3s, box-shadow 0.3s;
    }
    .about-feature:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,0.05); }
    .about-feature .feature-dot {
      width: 36px; height: 36px;
      background: rgba(255,87,34,0.07);
      border-radius: 10px;
      display: flex; align-items: center; justify-content: center;
      font-size: 1rem;
      margin-bottom: 12px;
    }
    .about-feature h3 { font-size: 0.9rem; font-weight: 700; color: var(--dark); margin-bottom: 5px; }
    .about-feature p { font-size: 0.8rem; color: var(--gray-500); line-height: 1.6; }

    /* ===== CTA ===== */
    .cta-section { padding: 80px 0; }
    .cta-inner {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      border-radius: 20px;
      padding: 56px 8vw;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 56px;
    }
    .cta-text { text-align: left; flex: 1; }
    .cta-text h2 {
      font-size: clamp(1.4rem, 2.5vw, 2rem);
      font-weight: 800;
      color: var(--white);
      margin-bottom: 12px;
    }
    .cta-text p {
      color: rgba(255,255,255,0.82);
      font-size: 0.95rem;
      margin-bottom: 28px;
      line-height: 1.7;
    }
    .btn-white {
      padding: 12px 32px;
      background: var(--white);
      color: var(--primary);
      border-radius: 10px;
      font-size: 0.92rem;
      font-weight: 700;
      cursor: pointer;
      border: none;
      transition: transform 0.2s, box-shadow 0.2s;
      box-shadow: 0 4px 16px rgba(0,0,0,0.15);
      display: inline-block;
    }
    .btn-white:hover { transform: translateY(-1px); box-shadow: 0 6px 24px rgba(0,0,0,0.2); }
    .cta-qrcode {
      flex-shrink: 0;
      text-align: center;
    }
    .cta-qrcode img {
      width: 132px;
      height: 132px;
      border-radius: 14px;
      background: var(--white);
      padding: 8px;
      box-shadow: 0 4px 24px rgba(0,0,0,0.15);
    }
    .cta-qrcode span {
      display: block;
      margin-top: 12px;
      color: rgba(255,255,255,0.88);
      font-size: 0.8rem;
      font-weight: 500;
    }

    /* ===== 页脚 ===== */
    footer {
      padding: 48px 0;
      background: var(--gray-900);
    }
    .footer-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }
    .footer-logo {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .footer-logo img { height: 26px; width: auto; filter: brightness(0) invert(1); }
    .footer-links {
      display: flex;
      gap: 28px;
      list-style: none;
    }
    .footer-links a {
      font-size: 0.82rem;
      color: var(--gray-500);
      transition: color 0.2s;
    }
    .footer-links a:hover { color: var(--white); }
    .footer-copy { font-size: 0.78rem; color: var(--gray-700); }

    /* ===== 滚动动画 ===== */
    .reveal {
      opacity: 1;
      transform: none;
      transition: opacity 0.5s ease, transform 0.5s ease;
    }
    .reveal.visible { opacity: 1; transform: translateY(0); }

    /* ===== 响应式 ===== */
    @media (max-width: 768px) {
      :root { --section-py: 72px; }
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .hero-inner { grid-template-columns: 1fr; text-align: center; }
      .hero-sub { margin: 0 auto 36px; }
      .hero-actions { justify-content: center; }
      .hero-visual { order: -1; }
      .hero-phone { width: 220px; }
      .float-tag { display: none; }
      .stats-bar { grid-template-columns: repeat(2, 1fr); gap: 20px; padding: 36px 0; }
      .cta-inner { flex-direction: column; padding: 36px 6vw; text-align: center; }
      .cta-text { text-align: center; }
      .cta-qrcode img { width: 120px; height: 120px; }
      .footer-inner { flex-direction: column; align-items: flex-start; }
      .products-grid { grid-template-columns: 1fr; }
      .honors-grid { grid-template-columns: 1fr 1fr; }
      .about-features { grid-template-columns: 1fr; }
    }
    @media (max-width: 1024px) and (min-width: 769px) {
      .products-grid { grid-template-columns: repeat(2, 1fr); }
      .honors-grid { grid-template-columns: repeat(2, 1fr); }
    }
    nav.open .nav-links {
      display: flex;
      flex-direction: column;
      position: absolute;
      top: var(--nav-h);
      left: 0; right: 0;
      background: var(--white);
      padding: 20px 24px 28px;
      border-bottom: 1px solid var(--gray-300);
      gap: 1.2rem;
      box-shadow: 0 8px 24px rgba(0,0,0,0.06);
    }
  
/* Content stays visible without JavaScript. */
:root { --gray-500: #666; }
section, [id] { scroll-margin-top: 88px; }
:focus-visible { outline: 3px solid var(--primary-dark); outline-offset: 4px; }
.hamburger { background: none; border: 0; }
.nav-links { gap: 24px; }
.nav-logo span { font-size: 1.05rem; font-weight: 700; color: var(--dark); }
.skip-link { position: fixed; top: -80px; left: 16px; z-index: 2000; padding: 10px 18px; background: white; }
.skip-link:focus { top: 10px; }
.hero-visual { flex-direction: column; gap: 12px; }
.image-caption { color: var(--gray-500); font-size: .75rem; max-width: 300px; text-align: center; }
.hero-phone { max-height: 600px; }
.hero-phone img { width: 100%; height: auto; }
.entity-card { max-width: 820px; margin: 0 auto; }
.entity-card p { color: var(--gray-700); margin-bottom: 16px; }
.entity-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 0 32px; margin-top: 24px; }
.entity-facts div { padding: 15px 0; border-bottom: 1px solid var(--gray-300); }
.entity-facts dt { color: var(--gray-500); font-size: .8rem; }
.entity-facts dd { font-weight: 600; margin-top: 4px; overflow-wrap: anywhere; }
.text-link { color: var(--primary-dark); text-decoration: underline; text-underline-offset: 4px; }
.product-card .text-link { display: inline-block; margin-top: 18px; font-size: .85rem; }
.guide-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.guide-card { padding: 30px 26px; border: 1px solid var(--gray-300); border-radius: var(--radius); }
.guide-card h3 { margin: 12px 0; font-size: 1.12rem; }
.guide-card p { font-size: .9rem; color: var(--gray-700); margin-bottom: 20px; }
.guide-number { color: var(--primary); font-size: .8rem; font-weight: 700; }
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item { padding: 24px 0; border-bottom: 1px solid var(--gray-300); }
.faq-item h3 { font-size: 1.02rem; margin-bottom: 10px; }
.faq-item p { color: var(--gray-700); font-size: .94rem; }
.cta-text p { color: white; }
.download-note { font-size: .8rem !important; margin: 16px 0 0 !important; }
.footer-links { flex-wrap: wrap; gap: 14px 24px; }
.footer-links a, .footer-copy { color: #c6c6c6; }
.footer-entity { color: #eee; font-size: .9rem; margin-bottom: 14px; }
.article-main { padding: calc(var(--nav-h) + 56px) 0 72px; background: linear-gradient(180deg, #fff5f2, #fff 500px); }
.article-main .container { max-width: 900px; }
.breadcrumbs { font-size: .85rem; color: var(--gray-700); margin-bottom: 26px; }
.breadcrumbs a { text-decoration: underline; }
.article-main h1 { font-size: clamp(1.8rem, 4vw, 2.7rem); line-height: 1.35; margin-bottom: 20px; }
.article-lead { color: var(--gray-700); font-size: 1.02rem; margin-bottom: 20px; }
.article-meta { color: var(--gray-500); font-size: .82rem; margin-bottom: 30px; }
.article-toc { background: white; border: 1px solid var(--gray-300); border-radius: 14px; padding: 22px; margin: 30px 0; }
.article-toc ul { padding-left: 20px; }
.article-toc a { color: var(--primary-dark); text-decoration: underline; }
.article-section { padding: 28px 0; }
.article-section h2 { font-size: 1.4rem; margin-bottom: 18px; }
.article-section h3 { font-size: 1.05rem; margin: 22px 0 10px; }
.article-section p { margin-bottom: 14px; color: var(--gray-700); }
.article-section ul, .article-section ol { padding-left: 24px; color: var(--gray-700); }
.article-section li { margin-bottom: 12px; }
.table-wrap { overflow-x: auto; border: 1px solid var(--gray-300); border-radius: 12px; }
table { border-collapse: collapse; width: 100%; font-size: .9rem; }
th, td { padding: 16px; text-align: left; border-bottom: 1px solid var(--gray-300); min-width: 130px; }
th { background: var(--gray-100); }
tr:last-child td { border-bottom: 0; }
.article-callout { background: var(--gray-100); border-left: 3px solid var(--primary); padding: 20px 24px; margin: 20px 0; }
.article-related { border-top: 1px solid var(--gray-300); padding-top: 28px; margin-top: 28px; }
.article-related ul { padding-left: 20px; }
@media (max-width: 1024px) and (min-width: 769px) {
 .nav-links { gap: 18px; }
 .nav-links a { font-size: .85rem; }
}
@media (max-width: 768px) {
 .nav-logo span { font-size: .93rem; }
 .nav-logo img { height: 30px; }
 .hero-visual { order: 0; margin-top: 16px; }
 .hero { padding-top: calc(var(--nav-h) + 48px); }
 .hero-inner { gap: 32px; }
 .hero-phone { width: 220px; max-height: 460px; }
 .entity-facts, .guide-grid { grid-template-columns: 1fr; }
 .article-main { padding-top: calc(var(--nav-h) + 32px); }
 .footer-links { gap: 14px 20px; }
}
@media (prefers-reduced-motion: reduce) {
 html { scroll-behavior: auto; }
 *, *::before, *::after { animation: none !important; transition: none !important; }
}