/* ============================================
       Reset & Base
       ============================================ */
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
    body {
      margin: 0;
      font-family: 'Manrope', 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', sans-serif;
      font-size: 16px;
      line-height: 1.65;
      color: #0F172A;
      background: #FFFFFF;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      text-rendering: optimizeLegibility;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: inherit; text-decoration: none; }
    button { font-family: inherit; cursor: pointer; border: none; background: none; }

    :root {
      --color-brand-blue: #0066FF;       /* Sivantos 亮蓝（采自 2025 Kick-Off） */
      --color-brand-blue-deep: #0052CC;  /* 深态/按压 */
      --color-brand-blue-soft: #E8F1FF;  /* 浅蓝底纹 */
      --color-text-primary: #0F172A;
      --color-text-secondary: #475569;
      --color-text-muted: #94A3B8;
      --color-bg: #FFFFFF;
      --color-bg-alt: #F8FAFC;
      --color-border: #E2E8F0;
      --color-accent-cream: #F5EFE6;

      --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px;
      --space-6: 24px; --space-8: 32px; --space-12: 48px; --space-16: 64px;
      --space-24: 96px; --space-32: 128px;

      --radius-sm: 6px; --radius-md: 10px; --radius-lg: 16px; --radius-pill: 999px;

      --shadow-1: 0 1px 2px rgba(15,23,42,.04), 0 1px 1px rgba(15,23,42,.03);
      --shadow-2: 0 4px 12px rgba(15,23,42,.06), 0 2px 4px rgba(15,23,42,.04);
      --shadow-3: 0 12px 32px rgba(15,23,42,.08), 0 4px 8px rgba(15,23,42,.04);

      --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
      --duration-fast: 200ms;
      --duration-base: 320ms;
      --duration-slow: 520ms;

      --max-width: 1240px;
      --nav-height: 72px;
    }

    /* ============================================
       Utilities
       ============================================ */
    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    .container-wide { max-width: 1360px; margin: 0 auto; padding: 0 24px; }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 12px;
      font-weight: 600;
      letter-spacing: 0.18em;
      text-transform: uppercase;
      color: var(--color-brand-blue);
      margin-bottom: 20px;
    }
    .eyebrow::before {
      content: '';
      width: 24px; height: 1px; background: currentColor;
    }
    .h-display {
      font-size: clamp(44px, 6.2vw, 88px);
      font-weight: 700;
      line-height: 1.04;
      letter-spacing: -0.02em;
      margin: 0 0 24px;
    }
    .h-1 {
      font-size: clamp(34px, 4.4vw, 56px);
      font-weight: 700;
      line-height: 1.08;
      letter-spacing: -0.018em;
      margin: 0 0 20px;
    }
    .h-2 {
      font-size: clamp(28px, 3vw, 40px);
      font-weight: 600;
      line-height: 1.18;
      letter-spacing: -0.01em;
      margin: 0 0 16px;
    }
    .h-3 {
      font-size: 22px;
      font-weight: 600;
      line-height: 1.3;
      margin: 0 0 12px;
    }
    .lead {
      font-size: 18px;
      line-height: 1.7;
      color: var(--color-text-secondary);
      max-width: 56ch;
    }
    .muted { color: var(--color-text-secondary); }

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 14px 24px;
      border-radius: var(--radius-pill);
      font-size: 15px;
      font-weight: 600;
      transition: all var(--duration-fast) var(--ease-out);
      white-space: nowrap;
    }
    .btn-primary {
      background: var(--color-brand-blue);
      color: #FFFFFF;
    }
    .btn-primary:hover {
      background: var(--color-brand-blue-deep);
      transform: translateY(-1px);
      box-shadow: var(--shadow-2);
    }
    .btn-ghost {
      background: transparent;
      color: var(--color-text-primary);
      border: 1px solid var(--color-border);
    }
    .btn-ghost:hover {
      border-color: var(--color-text-primary);
      background: var(--color-bg-alt);
    }
    .arrow {
      width: 14px; height: 14px;
      transition: transform var(--duration-fast) var(--ease-out);
    }
    .btn:hover .arrow { transform: translateX(4px); }

    /* ============================================
       Sticky Nav
       ============================================ */
    .nav {
      position: fixed;
      top: 0; left: 0; right: 0;
      z-index: 100;
      height: var(--nav-height);
      display: flex;
      align-items: center;
      background: rgba(255,255,255,0.6);
      backdrop-filter: saturate(180%) blur(16px);
      -webkit-backdrop-filter: saturate(180%) blur(16px);
      transition: background var(--duration-base) var(--ease-out),
                  border-color var(--duration-base) var(--ease-out);
      border-bottom: 1px solid transparent;
    }
    .nav.scrolled {
      background: rgba(255,255,255,0.92);
      border-bottom-color: var(--color-border);
    }
    .nav-inner {
      width: 100%;
      max-width: 1360px;
      margin: 0 auto;
      padding: 0 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 32px;
    }
    .nav-logo {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .nav-logo img {
      height: 32px;
      width: auto;
    }
    .nav-links {
      display: flex;
      gap: 4px;
      list-style: none;
      margin: 0; padding: 0;
    }
    .nav-links a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 14px;
      font-weight: 500;
      color: var(--color-text-secondary);
      border-radius: var(--radius-sm);
      transition: color var(--duration-fast) var(--ease-out),
                  background var(--duration-fast) var(--ease-out);
    }
    .nav-links a:hover {
      color: var(--color-text-primary);
      background: var(--color-bg-alt);
    }
    .nav-cta { display: flex; align-items: center; gap: 12px; }
    .nav-cta .btn { padding: 10px 18px; font-size: 14px; }

    @media (max-width: 880px) {
      .nav-links { display: none; }
      .nav-cta .btn-ghost { display: none; }
    }

    /* ============================================
       Hero
       ============================================ */
    .hero {
      padding-top: calc(var(--nav-height) + 64px);
      padding-bottom: 96px;
      position: relative;
      overflow: hidden;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(ellipse at 80% 0%, var(--color-brand-blue-soft) 0%, transparent 50%);
      opacity: 0.5;
      pointer-events: none;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
      gap: 64px;
      align-items: center;
      position: relative;
    }
    .hero-content { display: flex; flex-direction: column; }
    .hero-eyebrow-row {
      display: flex; gap: 8px; align-items: center;
      margin-bottom: 24px;
    }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 12px;
      background: var(--color-brand-blue-soft);
      color: var(--color-brand-blue);
      font-size: 12px;
      font-weight: 600;
      border-radius: var(--radius-pill);
      letter-spacing: 0.04em;
    }
    .hero-tag-dot {
      width: 6px; height: 6px; border-radius: 50%;
      background: var(--color-brand-blue);
    }
    .hero h1 {
      font-size: clamp(48px, 6.4vw, 96px);
      font-weight: 700;
      line-height: 1.02;
      letter-spacing: -0.025em;
      margin: 0 0 28px;
    }
    .hero h1 em {
      font-style: normal;
      background: linear-gradient(135deg, var(--color-brand-blue) 0%, var(--color-brand-blue-deep) 100%);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }
    .hero-sub {
      font-size: 18px;
      line-height: 1.7;
      color: var(--color-text-secondary);
      max-width: 52ch;
      margin: 0 0 40px;
    }
    .hero-ctas {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
      margin-bottom: 56px;
    }
    .hero-stats {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
      padding-top: 32px;
      border-top: 1px solid var(--color-border);
    }
    .hero-stat-num {
      font-size: 36px;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: var(--color-text-primary);
      line-height: 1;
      margin-bottom: 8px;
    }
    .hero-stat-num em {
      font-style: normal;
      color: var(--color-brand-blue);
    }
    .hero-stat-label {
      font-size: 13px;
      color: var(--color-text-secondary);
      line-height: 1.5;
    }

    .hero-media {
      position: relative;
      aspect-ratio: 5 / 4;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-3);
      background: var(--color-brand-blue-soft);
    }
    .hero-media img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }
    .hero-media-caption {
      position: absolute;
      bottom: 24px; left: 24px; right: 24px;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      padding: 16px 20px;
      border-radius: var(--radius-md);
      font-size: 13px;
      color: var(--color-text-secondary);
      line-height: 1.55;
    }
    .hero-media-caption strong {
      display: block;
      color: var(--color-text-primary);
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 2px;
    }

    @media (max-width: 880px) {
      .hero { padding-top: calc(var(--nav-height) + 32px); padding-bottom: 64px; }
      .hero-grid { grid-template-columns: 1fr; gap: 40px; }
      .hero-media { aspect-ratio: 4 / 3; }
      .hero-stats { grid-template-columns: repeat(3, 1fr); gap: 16px; }
      .hero-stat-num { font-size: 26px; }
    }

    /* ============================================
       Brand Story (双栏融合版)
       ============================================ */
    .story {
      padding: 96px 0;
      background: var(--color-bg-alt);
    }
    .story-head {
      max-width: 720px;
      margin-bottom: 64px;
    }
    .story-head h2 {
      font-size: clamp(32px, 4vw, 52px);
      font-weight: 700;
      line-height: 1.1;
      letter-spacing: -0.02em;
      margin: 0 0 16px;
    }
    .story-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }
    .story-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      padding: 48px;
      position: relative;
      overflow: hidden;
      transition: transform var(--duration-base) var(--ease-out),
                  box-shadow var(--duration-base) var(--ease-out);
    }
    .story-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-3);
    }
    .story-card::before {
      content: '';
      position: absolute;
      top: 0; right: 0;
      width: 200px; height: 200px;
      background: radial-gradient(circle, var(--color-brand-blue-soft) 0%, transparent 70%);
      opacity: 0.6;
      pointer-events: none;
    }
    .story-card .eyebrow {
      color: var(--color-brand-blue);
    }
    .story-card h3 {
      font-size: 30px;
      font-weight: 700;
      letter-spacing: -0.015em;
      margin: 0 0 12px;
    }
    .story-card .lead {
      margin-bottom: 32px;
      font-size: 16px;
    }
    .story-stats {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      margin-bottom: 28px;
      padding-top: 28px;
      border-top: 1px solid var(--color-border);
    }
    .story-stat {
      display: flex;
      flex-direction: column;
    }
    .story-stat-num {
      font-size: 30px;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: var(--color-brand-blue);
      line-height: 1;
      margin-bottom: 8px;
    }
    .story-stat-label {
      font-size: 13px;
      color: var(--color-text-secondary);
      line-height: 1.5;
    }
    .story-tag-list {
      display: flex; flex-wrap: wrap; gap: 8px;
    }
    .story-tag {
      padding: 6px 12px;
      background: var(--color-bg-alt);
      color: var(--color-text-secondary);
      font-size: 13px;
      border-radius: var(--radius-pill);
    }

    /* 品牌发展沿革时间线 */
    .story-timeline {
      position: relative;
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 20px;
      margin-bottom: 64px;
    }
    .story-timeline::before {
      content: '';
      position: absolute;
      top: 7px;
      left: 10%;
      right: 10%;
      height: 2px;
      background: linear-gradient(90deg, var(--color-brand-blue) 0%, var(--color-brand-blue-soft) 100%);
      opacity: 0.4;
      z-index: 0;
    }
    .story-node {
      position: relative;
      z-index: 1;
      text-align: center;
      padding: 0 12px;
    }
    .story-node-dot {
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: var(--color-brand-blue);
      border: 3px solid var(--color-bg-alt);
      margin: 0 auto 16px;
    }
    .story-node-year {
      font-size: 26px;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: var(--color-brand-blue);
      line-height: 1;
      margin-bottom: 12px;
    }
    .story-node-text {
      font-size: 13px;
      line-height: 1.6;
      color: var(--color-text-secondary);
      max-width: 200px;
      margin: 0 auto;
    }
    @media (max-width: 880px) {
      .story { padding: 64px 0; }
      .story-grid { grid-template-columns: 1fr; }
      .story-card { padding: 32px; }
      .story-card h3 { font-size: 24px; }
      .story-timeline { grid-template-columns: 1fr; gap: 32px; margin-bottom: 48px; }
      .story-timeline::before { display: none; }
      .story-node { text-align: center; padding: 0; }
    }

    /* ============================================
       Technology
       ============================================ */
    .tech { padding: 120px 0; }
    .tech-head {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 64px;
      align-items: end;
      margin-bottom: 64px;
    }
    .tech-head h2 {
      font-size: clamp(32px, 4vw, 52px);
      font-weight: 700;
      line-height: 1.1;
      letter-spacing: -0.02em;
      margin: 0;
    }
    .tech-head p {
      font-size: 17px;
      color: var(--color-text-secondary);
      line-height: 1.7;
      margin: 0;
    }
    .tech-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }
    .tech-card {
      position: relative;
      padding: 40px 32px;
      background: var(--color-bg-alt);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      transition: all var(--duration-base) var(--ease-out);
      overflow: hidden;
    }
    .tech-card::after {
      content: '';
      position: absolute;
      bottom: -40px; right: -40px;
      width: 160px; height: 160px;
      border-radius: 50%;
      background: var(--color-brand-blue-soft);
      transition: transform var(--duration-slow) var(--ease-out);
    }
    .tech-card:hover {
      background: #FFFFFF;
      border-color: var(--color-brand-blue);
      transform: translateY(-4px);
      box-shadow: var(--shadow-3);
    }
    .tech-card:hover::after { transform: scale(1.5); }
    .tech-num {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.08em;
      color: var(--color-brand-blue);
      margin-bottom: 24px;
      position: relative; z-index: 1;
    }
    .tech-card h3 {
      font-size: 24px;
      font-weight: 700;
      letter-spacing: -0.01em;
      margin: 0 0 12px;
      position: relative; z-index: 1;
    }
    .tech-card p {
      font-size: 15px;
      color: var(--color-text-secondary);
      line-height: 1.65;
      margin: 0 0 20px;
      position: relative; z-index: 1;
    }
    .tech-list {
      list-style: none; padding: 0; margin: 0;
      position: relative; z-index: 1;
    }
    .tech-list li {
      font-size: 14px;
      color: var(--color-text-secondary);
      padding: 8px 0;
      padding-left: 22px;
      position: relative;
      border-top: 1px solid var(--color-border);
    }
    .tech-list li:first-child { border-top: none; }
    .tech-list li::before {
      content: '';
      position: absolute;
      left: 0; top: 14px;
      width: 12px; height: 1px;
      background: var(--color-brand-blue);
    }
    @media (max-width: 880px) {
      .tech { padding: 64px 0; }
      .tech-head { grid-template-columns: 1fr; gap: 16px; }
      .tech-grid { grid-template-columns: 1fr; }
    }

    /* ============================================
       Products
       ============================================ */
    .products {
      padding: 120px 0;
      background: var(--color-bg-alt);
    }
    .products-head {
      display: flex;
      justify-content: space-between;
      align-items: end;
      gap: 48px;
      margin-bottom: 56px;
    }
    .products-head h2 {
      font-size: clamp(32px, 4vw, 52px);
      font-weight: 700;
      line-height: 1.1;
      letter-spacing: -0.02em;
      margin: 0;
      max-width: 600px;
    }
    .products-head p {
      color: var(--color-text-secondary);
      font-size: 16px;
      max-width: 360px;
      margin: 0;
    }
    .products-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-bottom: 64px;
    }
    .product-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      padding: 32px 28px 28px;
      display: flex;
      flex-direction: column;
      transition: all var(--duration-base) var(--ease-out);
      position: relative;
      overflow: hidden;
    }
    .product-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-3);
      border-color: var(--color-brand-blue);
    }
    .product-badge {
      display: inline-flex;
      align-self: flex-start;
      padding: 4px 10px;
      background: var(--color-brand-blue-soft);
      color: var(--color-brand-blue);
      font-size: 11px;
      font-weight: 600;
      letter-spacing: 0.06em;
      border-radius: var(--radius-pill);
      margin-bottom: 24px;
    }
    .product-img {
      aspect-ratio: 1 / 1;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 -12px 24px;
    }
    .product-img img {
      max-width: 100%;
      max-height: 100%;
      object-fit: contain;
    }
    .product-cat {
      font-size: 12px;
      color: var(--color-text-muted);
      letter-spacing: 0.08em;
      text-transform: uppercase;
      margin-bottom: 6px;
    }
    .product-name {
      font-size: 22px;
      font-weight: 700;
      letter-spacing: -0.01em;
      margin: 0 0 4px;
    }
    .product-model {
      font-size: 14px;
      color: var(--color-text-secondary);
      margin-bottom: 20px;
    }
    .product-features {
      list-style: none; padding: 0; margin: 0 0 20px;
      flex: 1;
    }
    .product-features li {
      font-size: 14px;
      color: var(--color-text-secondary);
      padding: 8px 0 8px 18px;
      position: relative;
      border-top: 1px solid var(--color-border);
    }
    .product-features li:first-child { border-top: none; }
    .product-features li::before {
      content: '';
      position: absolute;
      left: 0; top: 16px;
      width: 8px; height: 1px;
      background: var(--color-brand-blue);
    }
    .product-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 14px;
      font-weight: 600;
      color: var(--color-brand-blue);
      margin-top: auto;
    }
    .product-link svg { transition: transform var(--duration-fast) var(--ease-out); }
    .product-link:hover svg { transform: translateX(4px); }

    @media (max-width: 1080px) {
      .products-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 640px) {
      .products-grid { grid-template-columns: 1fr; }
    }

    /* ============================================
       Product Detail Section · 产品"了解更多"详情
       ============================================ */
    .product-detail {
      scroll-margin-top: 80px;
      padding: 72px 0 96px;
      border-top: 1px solid var(--color-border);
      background: linear-gradient(180deg, #FFFFFF 0%, var(--color-bg-subtle) 100%);
    }
    .product-detail:first-of-type { border-top: none; }
    .product-detail .container { max-width: var(--container-max); }

    /* 顶部小导航 */
    .product-detail-nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      margin-bottom: 36px;
      padding-bottom: 16px;
      border-bottom: 1px dashed var(--color-border);
      font-size: 13px;
      color: var(--color-text-secondary);
      flex-wrap: wrap;
    }
    .pd-nav-back {
      color: var(--color-text-primary);
      font-weight: 600;
      text-decoration: none;
      transition: color var(--duration-fast) var(--ease-out);
    }
    .pd-nav-back:hover { color: var(--color-brand-blue); }
    .pd-nav-pos {
      padding: 4px 12px;
      background: var(--color-bg-subtle);
      border-radius: var(--radius-sm);
      font-weight: 600;
      color: var(--color-text-muted);
      letter-spacing: 0.05em;
    }
    .pd-nav-link {
      font-weight: 600;
      color: var(--color-text-primary);
      text-decoration: none;
      padding: 8px 16px;
      border-radius: var(--radius-md);
      border: 1px solid var(--color-border);
      background: #FFFFFF;
      transition: all var(--duration-fast) var(--ease-out);
    }
    .pd-nav-link:hover {
      border-color: var(--color-brand-blue);
      color: var(--color-brand-blue);
      transform: translateY(-1px);
    }
    .pd-nav-disabled { opacity: 0.4; cursor: not-allowed; }

    /* Hero 区 */
    .product-detail-hero {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 56px;
      align-items: center;
      margin-bottom: 72px;
    }
    .pd-hero-img {
      position: relative;
      background: linear-gradient(135deg, #F0F7FF 0%, #E0EBF8 100%);
      border-radius: var(--radius-lg);
      padding: 48px 24px;
      aspect-ratio: 4 / 3;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }
    .pd-hero-img img {
      max-width: 100%;
      max-height: 100%;
      object-fit: contain;
      filter: drop-shadow(0 12px 32px rgba(15, 36, 80, 0.12));
    }
    .pd-badge {
      position: absolute;
      top: 20px;
      left: 20px;
      padding: 6px 14px;
      background: var(--color-brand-blue);
      color: #FFFFFF;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 0.06em;
      border-radius: 100px;
    }
    .pd-hero-info {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }
    .pd-type {
      font-size: 13px;
      color: var(--color-brand-blue);
      font-weight: 700;
      letter-spacing: 0.1em;
      text-transform: uppercase;
    }
    .pd-name {
      font-size: clamp(32px, 4vw, 48px);
      font-weight: 800;
      margin: 0;
      letter-spacing: -0.02em;
      color: var(--color-text-primary);
      line-height: 1.1;
    }
    .pd-name small {
      display: block;
      font-size: 0.5em;
      color: var(--color-text-muted);
      font-weight: 600;
      margin-top: 6px;
      letter-spacing: 0.04em;
    }
    .pd-tagline {
      font-size: 17px;
      line-height: 1.6;
      color: var(--color-text-secondary);
      margin: 0;
    }
    .pd-attrs {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px 20px;
      padding: 20px;
      background: var(--color-bg-subtle);
      border-radius: var(--radius-md);
      margin-top: 8px;
    }
    .pd-attr {
      display: flex;
      flex-direction: column;
      gap: 4px;
    }
    .pd-attr-label {
      font-size: 11px;
      color: var(--color-text-muted);
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }
    .pd-attr-val {
      font-size: 14px;
      color: var(--color-text-primary);
      font-weight: 600;
      line-height: 1.5;
    }
    .pd-cta-row {
      display: flex;
      gap: 12px;
      margin-top: 4px;
    }

    /* Block 通用 */
    .pd-block { margin-bottom: 72px; }
    .pd-block-head {
      margin-bottom: 28px;
    }
    .pd-eyebrow {
      display: inline-block;
      font-size: 11px;
      color: var(--color-brand-blue);
      font-weight: 700;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      margin-bottom: 8px;
    }
    .pd-block-head h3 {
      font-size: clamp(24px, 3vw, 32px);
      font-weight: 800;
      margin: 0;
      letter-spacing: -0.01em;
      color: var(--color-text-primary);
    }
    .pd-block-sub {
      margin-top: 8px;
      font-size: 14px;
      color: var(--color-text-secondary);
      line-height: 1.6;
    }

    /* 核心优势网格 */
    .pd-feat-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }
    .feat-card {
      padding: 24px;
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      transition: all var(--duration-base) var(--ease-out);
    }
    .feat-card:hover {
      border-color: var(--color-brand-blue);
      box-shadow: 0 8px 24px rgba(15, 36, 80, 0.08);
      transform: translateY(-2px);
    }
    .feat-card h5 {
      font-size: 16px;
      font-weight: 700;
      margin: 0 0 8px;
      color: var(--color-text-primary);
    }
    .feat-card p {
      font-size: 13.5px;
      line-height: 1.7;
      color: var(--color-text-secondary);
      margin: 0;
    }

    /* 技术规格表 */
    .pd-spec-table-wrap {
      overflow-x: auto;
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
    }
    .pd-spec-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 13.5px;
      min-width: 600px;
    }
    .pd-spec-table thead th {
      padding: 14px 12px;
      background: var(--color-bg-subtle);
      font-weight: 700;
      color: var(--color-text-primary);
      text-align: center;
      border-bottom: 2px solid var(--color-border);
      font-size: 13px;
    }
    .pd-spec-table thead th.spec-feature {
      text-align: left;
      padding-left: 24px;
    }
    .pd-spec-table tbody td,
    .pd-spec-table tbody th {
      padding: 12px 12px;
      border-bottom: 1px solid var(--color-border);
      text-align: center;
      color: var(--color-text-secondary);
    }
    .pd-spec-table tbody tr:last-child td,
    .pd-spec-table tbody tr:last-child th {
      border-bottom: none;
    }
    .pd-spec-table tbody tr:hover { background: rgba(31, 90, 195, 0.025); }
    .pd-spec-table tbody th.spec-label {
      text-align: left;
      padding-left: 24px;
      font-weight: 600;
      color: var(--color-text-primary);
      background: var(--color-bg-subtle);
      min-width: 200px;
    }
    .spec-level { color: var(--color-brand-blue); font-weight: 800; }

    /* 佩戴与场景图集（v4.0 落地） */
    .pd-gallery { margin-bottom: 72px; }
    .pd-gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }
    .pd-gallery-grid.is-single {
      grid-template-columns: minmax(0, 520px);
      justify-content: center;
    }
    .pd-gallery-grid.is-single .pd-gallery-item img { height: 420px; }
    .pd-gallery-item {
      margin: 0;
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all var(--duration-base) var(--ease-out);
    }
    .pd-gallery-item:hover {
      border-color: var(--color-brand-blue);
      box-shadow: 0 8px 24px rgba(15, 36, 80, 0.08);
      transform: translateY(-2px);
    }
    .pd-gallery-item img {
      width: 100%;
      height: 300px;
      max-width: 100%;
      object-fit: contain;        /* 完整显示，不裁剪佩戴/场景图 */
      object-position: center;
      display: block;
      background: var(--color-bg-subtle);
    }
    .pd-gallery-item.is-feature { grid-column: span 2; }
    .pd-gallery-item.is-feature img { height: 380px; }
    .pd-gallery-cap {
      padding: 14px 18px;
      border-top: 1px solid var(--color-border);
      background: var(--color-bg-subtle);
    }
    .pd-gallery-cap-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--color-text-primary);
      margin: 0 0 2px;
    }
    .pd-gallery-cap-desc {
      font-size: 12.5px;
      color: var(--color-text-secondary);
      margin: 0;
      line-height: 1.55;
    }

    /* 视频区块（v4.2 落地） */
    .vblock-frame {
      position: relative;
      max-width: 960px;          /* PC 端限宽，避免撑满屏幕 */
      margin: 0 auto;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      background: #0B1220;
      aspect-ratio: 16 / 9;
    }
    .vblock-frame video {
      width: 100%;
      height: 100%;
      display: block;
      object-fit: contain;          /* 完整显示，不被裁切 */
    }
    .vblock-cap {
      max-width: 960px;          /* 与视频画框同宽，上下对齐 */
      margin: 0 auto;
      padding: 14px 18px;
      border: 1px solid var(--color-border);
      border-top: none;
      border-radius: 0 0 var(--radius-lg) var(--radius-lg);
      background: var(--color-bg-subtle);
    }
    .vblock-cap-title { font-size: 14px; font-weight: 700; color: var(--color-text-primary); margin: 0 0 2px; }
    .vblock-cap-desc { font-size: 12.5px; color: var(--color-text-secondary); margin: 0; line-height: 1.55; }

    /* 首页 技术视频区 */
    .tech-video { padding: 96px 0; background: var(--color-bg-alt); }
    .tech-video .container { max-width: 1024px; }
    .tech-video-head { text-align: center; margin-bottom: 40px; }
    .tech-video-head .eyebrow { justify-content: center; }
    .tech-video-head h2 { font-size: clamp(30px, 4vw, 48px); font-weight: 700; line-height: 1.12; letter-spacing: -0.02em; margin: 0 0 14px; }
    .tech-video-head p { color: var(--color-text-secondary); font-size: 16px; margin: 0 auto; max-width: 560px; }
    .tech-video .vblock-frame { box-shadow: 0 20px 50px rgba(15, 36, 80, 0.12); }
    .tech-video .vblock-cap { text-align: center; }


    /* 底部 CTA */
    .pd-final-cta {
      margin-top: 56px;
    }
    .pd-final-cta-inner {
      padding: 48px 36px;
      background: linear-gradient(135deg, #FFFFFF 0%, #F0F7FF 100%);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      text-align: center;
    }
    .pd-final-cta-inner h3 {
      font-size: 26px;
      font-weight: 800;
      margin: 0 0 12px;
      color: var(--color-text-primary);
    }
    .pd-final-cta-inner p {
      font-size: 15px;
      line-height: 1.7;
      color: var(--color-text-secondary);
      margin: 0 0 24px;
      max-width: 560px;
      margin-left: auto;
      margin-right: auto;
    }

    /* 响应式 */
    @media (max-width: 980px) {
      .product-detail-hero {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .pd-hero-img { aspect-ratio: 5 / 3; padding: 36px 20px; }
      .pd-feat-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 640px) {
      .tech-video { padding: 64px 0; }
      .product-detail { padding: 48px 0 64px; }
      .pd-feat-grid { grid-template-columns: 1fr; }
      .pd-attrs { grid-template-columns: 1fr; }
      .pd-cta-row { flex-direction: column; }
      .pd-final-cta-inner { padding: 32px 24px; }
      .product-detail-nav { gap: 8px; }
      .pd-gallery-grid,
      .pd-gallery-grid.is-single { grid-template-columns: 1fr; }
      .pd-gallery-item.is-feature { grid-column: span 1; }
      .pd-gallery-item img,
      .pd-gallery-item.is-feature img,
      .pd-gallery-grid.is-single .pd-gallery-item img { height: 260px; }
      .pd-nav-pos { order: 3; flex-basis: 100%; text-align: center; }
    }

    /* Types Overview */
    .types {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      padding: 48px;
    }
    .types-head {
      display: flex;
      justify-content: space-between;
      align-items: end;
      margin-bottom: 32px;
    }
    .types-head h3 {
      font-size: 24px;
      font-weight: 700;
      letter-spacing: -0.01em;
      margin: 0;
    }
    .types-head p {
      font-size: 14px;
      color: var(--color-text-secondary);
      margin: 0;
    }
    .types-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .type-item {
      padding: 24px 0;
      border-top: 1px solid var(--color-border);
    }
    .type-code {
      display: inline-block;
      font-size: 11px;
      font-weight: 700;
      letter-spacing: 0.16em;
      color: var(--color-brand-blue);
      margin-bottom: 12px;
    }
    .type-name {
      font-size: 18px;
      font-weight: 600;
      letter-spacing: -0.005em;
      margin: 0 0 8px;
    }
    .type-desc {
      font-size: 13px;
      color: var(--color-text-secondary);
      line-height: 1.55;
      margin: 0;
    }
    @media (max-width: 880px) {
      .types { padding: 28px; }
      .types-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
      .types-head { flex-direction: column; align-items: start; gap: 8px; }
    }

    /* ============================================
       Lifestyle
       ============================================ */
    .lifestyle {
      padding: 120px 0;
    }
    .lifestyle-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 64px;
      align-items: center;
    }
    .lifestyle-media {
      display: grid;
      grid-template-columns: 1fr 1fr;
      grid-template-rows: auto 220px;
      gap: 12px;
    }
    .lifestyle-media > div {
      border-radius: var(--radius-md);
      overflow: hidden;
      position: relative;
    }
    .lifestyle-media > div img {
      width: 100%; height: 100%; object-fit: cover;
    }
    .lifestyle-media > div:first-child {
      grid-column: span 2;
      aspect-ratio: 5 / 2;
    }
    .lifestyle-content h2 {
      font-size: clamp(32px, 4vw, 48px);
      font-weight: 700;
      line-height: 1.12;
      letter-spacing: -0.02em;
      margin: 0 0 24px;
    }
    .lifestyle-content h2 em {
      font-style: normal;
      color: var(--color-brand-blue);
    }
    .lifestyle-content .lead {
      margin-bottom: 32px;
    }
    .lifestyle-list {
      list-style: none; padding: 0; margin: 0;
    }
    .lifestyle-list li {
      padding: 16px 0;
      border-top: 1px solid var(--color-border);
      display: flex; gap: 16px;
      align-items: flex-start;
    }
    .lifestyle-list li:last-child { border-bottom: 1px solid var(--color-border); }
    .lifestyle-num {
      flex: 0 0 auto;
      font-size: 13px;
      font-weight: 700;
      color: var(--color-brand-blue);
      letter-spacing: 0.08em;
    }
    .lifestyle-text {
      font-size: 15px;
      line-height: 1.65;
      color: var(--color-text-primary);
    }
    @media (max-width: 880px) {
      .lifestyle { padding: 64px 0; }
      .lifestyle-grid { grid-template-columns: 1fr; gap: 32px; }
      .lifestyle-media { grid-template-rows: auto 160px; }
    }

    /* ============================================
       Trust / 资质
       ============================================ */
    .trust {
      padding: 96px 0;
      background: var(--color-text-primary);
      color: #FFFFFF;
    }
    .trust .eyebrow { color: #93C5FD; }
    .trust .eyebrow::before { background: #93C5FD; }
    .trust-head h2 {
      font-size: clamp(32px, 4vw, 52px);
      font-weight: 700;
      line-height: 1.1;
      letter-spacing: -0.02em;
      margin: 0 0 16px;
      max-width: 16ch;
    }
    .trust-head p {
      font-size: 17px;
      color: #94A3B8;
      max-width: 56ch;
      margin: 0 0 64px;
      line-height: 1.7;
    }
    .trust-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1px;
      background: rgba(255,255,255,0.08);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: var(--radius-lg);
      overflow: hidden;
    }
    .trust-card {
      background: var(--color-text-primary);
      padding: 32px 28px;
      transition: background var(--duration-fast) var(--ease-out);
    }
    .trust-card:hover { background: #1E293B; }
    .trust-icon {
      width: 32px; height: 32px;
      margin-bottom: 20px;
      color: #93C5FD;
    }
    .trust-card h3 {
      font-size: 18px;
      font-weight: 600;
      margin: 0 0 10px;
      color: #FFFFFF;
    }
    .trust-card p {
      font-size: 14px;
      line-height: 1.6;
      color: #94A3B8;
      margin: 0;
    }
    @media (max-width: 880px) {
      .trust { padding: 64px 0; }
      .trust-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 540px) {
      .trust-grid { grid-template-columns: 1fr; }
    }

    /* ============================================
       City Service Network · 城市服务网络
       ============================================ */
    .network { padding: 104px 0; background: var(--color-bg-alt); }
    .network-grid {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 56px;
      align-items: stretch;
    }
    /* 小程序卡（左侧） */
    .mp-card {
      background: linear-gradient(150deg, #0F172A 0%, #13325C 100%);
      border-radius: var(--radius-lg);
      padding: 36px 32px;
      color: #FFFFFF;
      display: flex;
      flex-direction: column;
      position: relative;
      overflow: hidden;
    }
    .mp-card::after {
      content: "";
      position: absolute;
      right: -60px; top: -60px;
      width: 220px; height: 220px;
      background: radial-gradient(circle, rgba(0,102,255,0.35) 0%, transparent 70%);
      pointer-events: none;
    }
    .mp-card .eyebrow { color: #7FB0FF; }
    .mp-card .eyebrow::before { background: #7FB0FF; }
    .mp-card h3 {
      font-size: 24px;
      font-weight: 600;
      margin: 14px 0 10px;
      letter-spacing: -0.01em;
    }
    .mp-card p { color: #C7D2E0; font-size: 14px; line-height: 1.7; margin: 0 0 22px; }
    .mp-qr {
      width: 132px; height: 132px;
      background: #FFFFFF;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 10px;
      margin-bottom: 18px;
      flex: 0 0 auto;
    }
    .mp-qr img { width: 100%; height: 100%; object-fit: contain; border-radius: 6px; }
    .mp-qr-placeholder {
      width: 100%; height: 100%;
      border: 1.5px dashed #CBD5E1;
      border-radius: 6px;
      display: flex; align-items: center; justify-content: center;
      text-align: center;
      font-size: 10px; line-height: 1.5;
      color: #94A3B8;
      padding: 8px;
    }
    .mp-path {
      font-family: 'SFMono-Regular', ui-monospace, Menlo, Consolas, monospace;
      font-size: 11px;
      color: #9FB3CC;
      background: rgba(255,255,255,0.08);
      border: 1px solid rgba(255,255,255,0.12);
      border-radius: 8px;
      padding: 8px 10px;
      word-break: break-all;
      margin-bottom: 16px;
    }
    .mp-card .btn-primary {
      align-self: flex-start;
      background: #FFFFFF;
      color: #0F172A;
    }
    .mp-card .btn-primary:hover { background: #E8F1FF; }
    .mp-hint { font-size: 12px; color: #8DA3BE; margin-top: 14px; line-height: 1.6; }

    /* 右侧：说明 + 数据 + 城市网格 */
    .network-aside { display: flex; flex-direction: column; }
    .network-aside .lead { margin-bottom: 24px; }
    .network-stats {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-bottom: 28px;
    }
    .network-stat {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      padding: 18px 16px;
    }
    .network-stat-num {
      font-size: 26px; font-weight: 700; color: var(--color-brand-blue);
      line-height: 1.1; letter-spacing: -0.02em;
    }
    .network-stat-label { font-size: 12px; color: var(--color-text-secondary); margin-top: 6px; }

    .city-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 10px;
    }
    .city-chip {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: 999px;
      padding: 9px 14px;
      font-size: 13px;
      color: var(--color-text-primary);
      text-align: center;
      transition: border-color var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out);
    }
    .city-chip:hover { border-color: var(--color-brand-blue); color: var(--color-brand-blue); }
    .city-empty {
      grid-column: 1 / -1;
      border: 1.5px dashed var(--color-border);
      border-radius: var(--radius-md);
      padding: 22px;
      text-align: center;
      color: var(--color-text-secondary);
      font-size: 14px;
      line-height: 1.7;
    }
    .network-note {
      margin-top: 18px;
      font-size: 12px;
      color: var(--color-text-muted);
      line-height: 1.6;
    }
    .network-note strong { color: var(--color-text-secondary); font-weight: 600; }

    @media (max-width: 980px) {
      .network-grid { grid-template-columns: 1fr; gap: 32px; }
      .city-grid { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 640px) {
      .network { padding: 72px 0; }
      .network-stats { grid-template-columns: 1fr; }
      .city-grid { grid-template-columns: repeat(2, 1fr); }
    }

    /* ============================================
       Footer
       ============================================ */
    .footer {
      padding: 80px 0 32px;
      background: #FFFFFF;
      border-top: 1px solid var(--color-border);
    }
    .footer-top {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 48px;
      padding-bottom: 56px;
      border-bottom: 1px solid var(--color-border);
    }
    .footer-brand .footer-logo {
      height: 28px;
      margin-bottom: 16px;
    }
    .footer-brand p {
      font-size: 14px;
      color: var(--color-text-secondary);
      line-height: 1.65;
      max-width: 36ch;
      margin: 0 0 24px;
    }
    .footer-group-label {
      flex: 0 0 100%;
      font-size: 11px;
      font-weight: 600;
      letter-spacing: 0.14em;
      text-transform: uppercase;
      color: #94A3B8;
    }
    .footer-sub-brands {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
      align-items: center;
      padding-top: 20px;
      border-top: 1px dashed var(--color-border);
    }
    .footer-sub-brands img {
      height: 22px;
      width: auto;
      opacity: 0.55;
      filter: grayscale(100%);
      transition: all var(--duration-fast) var(--ease-out);
    }
    .footer-sub-brands img:hover {
      opacity: 1;
      filter: grayscale(0%);
    }
    /* WSA 集团品牌矩阵：8 个单品牌 logo 2×4 严格网格
       v3.6: 全灰 + 统一画布 480×80 + 字标像素高度 60 + grid 2 列 4 行严格对齐 */
    .footer-sub-brands-matrix-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px 18px;
      width: 100%;
      max-width: 460px;
      margin-top: 10px;
      align-items: center;
      justify-items: center;
    }
    .footer-sub-brands-matrix-grid img {
      display: block;
      height: 30px;
      width: auto;
      max-width: 100%;
      object-fit: contain;
      object-position: center center;
      opacity: 0.78;
      filter: drop-shadow(0 1px 2px rgba(15, 23, 42, 0.06));
      transition: all var(--duration-fast) var(--ease-out);
    }
    .footer-sub-brands-matrix-grid img:hover {
      opacity: 1;
      filter: drop-shadow(0 2px 6px rgba(15, 23, 42, 0.12));
      transform: translateY(-1px);
    }
    /* 母品牌 Sivantos 与其他一致高度，纯灰 */
    .footer-sub-brands-matrix-grid img.is-mother {
      height: 30px;
      opacity: 0.9;
    }
    .footer-sub-brands-matrix-grid img.is-mother:hover {
      transform: translateY(-2px);
    }
    @media (max-width: 640px) {
      .footer-sub-brands-matrix-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 10px 6px;
        max-width: 100%;
      }
      .footer-sub-brands-matrix-grid img { height: 22px; }
      .footer-sub-brands-matrix-grid img.is-mother { height: 22px; }
    }
    .footer-col h4 {
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--color-text-primary);
      margin: 0 0 18px;
    }
    .footer-col ul {
      list-style: none; padding: 0; margin: 0;
      display: flex; flex-direction: column; gap: 10px;
    }
    .footer-col a {
      font-size: 14px;
      color: var(--color-text-secondary);
      transition: color var(--duration-fast) var(--ease-out);
    }
    .footer-col a:hover { color: var(--color-text-primary); }
    .footer-bottom {
      padding-top: 32px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
      color: var(--color-text-muted);
    }
    .footer-bottom-links {
      display: flex; gap: 20px;
      list-style: none; padding: 0; margin: 0;
    }
    .footer-bottom-links a:hover { color: var(--color-text-primary); }
    @media (max-width: 880px) {
      .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
    }
    @media (max-width: 540px) {
      .footer-top { grid-template-columns: 1fr; }
    }

    /* ============================================
       Reveal animation
       ============================================ */
    .reveal {
      opacity: 0;
      transform: translateY(20px);
      transition: opacity 700ms var(--ease-out), transform 700ms var(--ease-out);
    }
    .reveal.is-visible {
      opacity: 1;
      transform: translateY(0);
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { animation: none !important; transition: none !important; }
      .reveal { opacity: 1; transform: none; }
    }
  

/* ===== 二级页面通用：顶部返回栏 ===== */
.subpage-topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 24px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.subpage-home {
  font-weight: 700;
  color: var(--color-brand-blue);
  text-decoration: none;
  font-size: 14px;
  white-space: nowrap;
}
.subpage-home:hover { text-decoration: underline; }
.subpage-crumb {
  font-size: 13px;
  color: var(--color-text-muted);
  text-decoration: none;
}
.subpage-crumb:hover { color: var(--color-text-secondary); }
@media (max-width: 640px) {
  .subpage-topbar { padding: 12px 16px; gap: 10px; }
  .subpage-crumb { font-size: 12px; }
}


/* ============================================
   移动端兼容增强（2026-09）
   ============================================ */

/* 锚点跳转不被固定导航遮挡 */
html { scroll-padding-top: var(--nav-height); }

/* 长单词/链接换行，防止横向溢出 */
body { overflow-wrap: break-word; }

/* 触屏设备：避免 :hover 态“粘住” */
@media (hover: none) {
  .btn:hover,
  .product-card:hover,
  .tech-card:hover,
  .story-card:hover,
  .trust-card:hover,
  .feat-card:hover,
  .pd-gallery-item:hover,
  .nav-links a:hover,
  .footer-col a:hover {
    transform: none !important;
    box-shadow: none !important;
  }
}

/* 移动端汉堡菜单（<=880px 显示，替代隐藏的 .nav-links） */
.nav-toggle { display: none; }
@media (max-width: 880px) {
  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px; height: 44px;
    margin-left: 8px;
    padding: 10px;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    -webkit-tap-highlight-color: transparent;
  }
  .nav-toggle span {
    display: block;
    width: 20px; height: 2px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: transform var(--duration-fast) var(--ease-out),
                opacity var(--duration-fast) var(--ease-out);
  }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .mobile-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0; right: 0;
    background: #FFFFFF;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-3);
    display: flex;
    flex-direction: column;
    padding: 4px 16px 16px;
    z-index: 99;
    max-height: calc(100vh - var(--nav-height));
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  .mobile-menu[hidden] { display: none; }
  .mobile-menu a {
    padding: 15px 8px;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text-primary);
    border-bottom: 1px solid var(--color-border);
  }
  .mobile-menu a:last-child { border-bottom: none; }
  .mobile-menu .mobile-menu-cta {
    margin-top: 12px;
    padding: 14px 16px;
    text-align: center;
    color: #FFFFFF;
    background: var(--color-brand-blue);
    border-radius: var(--radius-pill);
    border-bottom: none;
  }
}

/* 老浏览器不支持 aspect-ratio 时的高度兜底（Android WebView<88 / iOS<15） */
@supports not (aspect-ratio: 1 / 1) {
  .hero-media { height: 300px; }
  .product-img { height: 220px; }
  .pd-hero-img { height: 300px; }
  .vblock-frame { height: 220px; }
  .lifestyle-media > div:first-child { height: 180px; }
  .pd-gallery-item img,
  .pd-gallery-item.is-feature img,
  .pd-gallery-grid.is-single .pd-gallery-item img { height: 220px; }
}

/* 老浏览器不支持 flex gap 时的兜底（iOS Safari<14.1） */
@supports not (gap: 1px) {
  .hero-ctas > * + * { margin-left: 12px; }
  .hero-eyebrow-row > * + * { margin-left: 8px; }
  .product-link svg { margin-right: 6px; }
  .pd-nav-link svg { margin-right: 6px; }
  .story-tag-list > * + * { margin-left: 8px; }
  .footer-sub-brands > * + * { margin-left: 12px; }
  .nav-cta > * + * { margin-left: 12px; }
}

/* ============================================
   扫码弹窗（售前 / 售后二维码）
   ============================================ */
.qr-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(15, 23, 42, 0.55);
  -webkit-tap-highlight-color: transparent;
}
.qr-modal.open { display: flex; }
.qr-modal-box {
  position: relative;
  width: 280px;
  max-width: 86vw;
  padding: 24px 24px 26px;
  text-align: center;
  background: #FFFFFF;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(15, 23, 42, 0.28);
  animation: qrPop 0.18s ease-out;
}
@keyframes qrPop {
  from { transform: translateY(8px) scale(0.97); opacity: 0; }
  to   { transform: none; opacity: 1; }
}
.qr-modal-box img {
  width: 220px;
  height: 220px;
  max-width: 100%;
  object-fit: contain;
  border-radius: 10px;
  background: #F8FAFC;
}
.qr-modal-title {
  margin: 16px 0 4px;
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text-primary);
}
.qr-modal-hint {
  font-size: 13px;
  color: #64748B;
}
.qr-modal-close {
  position: absolute;
  top: 10px;
  right: 12px;
  width: 32px;
  height: 32px;
  font-size: 20px;
  line-height: 30px;
  color: #475569;
  background: #F1F5F9;
  border: none;
  border-radius: 50%;
  cursor: pointer;
}
.qr-modal-close:hover { background: #E2E8F0; }
@media (prefers-reduced-motion: reduce) {
  .qr-modal-box { animation: none; }
}