:root {
      /* 企业 VI：取自 logo 主色 */
      --brand-blue: #1010A8;
      --brand-red: #C80030;
      --ink: #12123A;
      --ink-soft: #4A4A6E;
      --line: rgba(16, 16, 168, 0.14);
      --paper: #F4F5FB;
      --panel: #FFFFFF;
      --accent: var(--brand-blue);
      --accent-deep: #0C0C7A;
      --accent-soft: #E4E6F8;
      --cta: var(--brand-red);
      --safe-b: env(safe-area-inset-bottom, 0px);
      --font-display: "Noto Serif SC", "Songti SC", serif;
      --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }

    body {
      font-family: var(--font-body);
      color: var(--ink);
      background:
        radial-gradient(110% 70% at 100% -5%, rgba(200, 0, 48, 0.10), transparent 52%),
        radial-gradient(90% 60% at -8% 18%, rgba(16, 16, 168, 0.14), transparent 55%),
        linear-gradient(180deg, #EAEBF8 0%, var(--paper) 30%, #F7F7FC 100%);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      padding-bottom: calc(88px + var(--safe-b));
    }

    .wrap {
      width: min(100%, 440px);
      margin: 0 auto;
      padding: 0 18px 24px;
    }

    .hero {
      position: relative;
      padding: 24px 0 22px;
      overflow: hidden;
    }

    .hero::before {
      content: "";
      position: absolute;
      inset: -18% -28% auto auto;
      width: 200px;
      height: 200px;
      border-radius: 50%;
      background:
        radial-gradient(circle at 30% 40%, rgba(16, 16, 168, 0.20), transparent 60%),
        radial-gradient(circle at 70% 65%, rgba(200, 0, 48, 0.14), transparent 55%);
      pointer-events: none;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 16px;
      text-decoration: none;
      color: inherit;
    }

    .brand img {
      width: 40px;
      height: 40px;
      object-fit: contain;
      flex: 0 0 auto;
    }

    .brand-text {
      display: flex;
      flex-direction: column;
      gap: 2px;
    }

    .brand-name {
      font-size: 14px;
      font-weight: 700;
      letter-spacing: 0.06em;
      color: var(--brand-blue);
    }

    .brand-sub {
      font-size: 12px;
      color: var(--ink-soft);
    }

    .tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 500;
      color: var(--accent-deep);
      background: var(--accent-soft);
      padding: 4px 10px;
      margin-bottom: 12px;
      letter-spacing: 0.02em;
    }

    h1 {
      font-family: var(--font-display);
      font-size: 28px;
      line-height: 1.3;
      font-weight: 700;
      letter-spacing: 0.02em;
      color: var(--ink);
      margin-bottom: 10px;
    }

    .lead {
      font-size: 15px;
      color: var(--ink-soft);
      max-width: 34em;
    }

    .chem {
      margin-top: 18px;
      font-size: 12px;
      color: var(--ink-soft);
      letter-spacing: 0.04em;
    }

    .chem strong {
      color: var(--brand-blue);
      font-weight: 600;
    }

    section {
      margin-top: 18px;
      padding: 18px 0 4px;
      border-top: 1px solid var(--line);
      animation: rise 0.55s ease both;
    }

    section:nth-of-type(1) { animation-delay: 0.05s; }
    section:nth-of-type(2) { animation-delay: 0.1s; }
    section:nth-of-type(3) { animation-delay: 0.15s; }
    section:nth-of-type(4) { animation-delay: 0.2s; }
    section:nth-of-type(5) { animation-delay: 0.25s; }
    section:nth-of-type(6) { animation-delay: 0.3s; }

    @keyframes rise {
      from { opacity: 0; transform: translateY(10px); }
      to { opacity: 1; transform: translateY(0); }
    }

    @media (prefers-reduced-motion: reduce) {
      section { animation: none; }
      html { scroll-behavior: auto; }
    }

    h2 {
      font-family: var(--font-display);
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      letter-spacing: 0.03em;
      color: var(--brand-blue);
    }

    p { font-size: 14.5px; color: var(--ink); margin-bottom: 10px; }
    .muted { color: var(--ink-soft); font-size: 13px; }

    ul.list {
      list-style: none;
      display: grid;
      gap: 10px;
    }

    ul.list li {
      position: relative;
      padding-left: 14px;
      font-size: 14.5px;
    }

    ul.list li::before {
      content: "";
      position: absolute;
      left: 0;
      top: 0.55em;
      width: 6px;
      height: 6px;
      background: var(--brand-red);
      border-radius: 1px;
    }

    .note {
      margin-top: 12px;
      padding: 10px 12px;
      background: rgba(16, 16, 168, 0.05);
      border-left: 3px solid var(--brand-blue);
      font-size: 13px;
      color: var(--ink-soft);
    }

    .callout {
      margin-top: 12px;
      padding: 14px 14px 12px;
      background: var(--panel);
      border: 1px solid var(--line);
      border-top: 3px solid var(--brand-red);
      box-shadow: 0 10px 28px rgba(16, 16, 168, 0.06);
    }

    .callout strong {
      display: block;
      font-size: 14px;
      margin-bottom: 6px;
      color: var(--ink);
    }

    .steps {
      display: grid;
      gap: 0;
      margin: 8px 0 12px;
      counter-reset: step;
    }

    .steps li {
      list-style: none;
      display: grid;
      grid-template-columns: 28px 1fr;
      gap: 10px;
      padding: 12px 0;
      border-bottom: 1px dashed var(--line);
      font-size: 14.5px;
    }

    .steps li:last-child { border-bottom: 0; }

    .steps li::before {
      counter-increment: step;
      content: counter(step);
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: var(--accent-soft);
      color: var(--brand-blue);
      font-size: 13px;
      font-weight: 700;
      display: grid;
      place-items: center;
      margin-top: 1px;
    }

    .capability {
      margin-top: 8px;
      padding: 16px;
      background: linear-gradient(145deg, #0C0C7A 0%, #1010A8 48%, #8A1038 130%);
      color: #F5F6FF;
    }

    .capability h2 {
      color: #fff;
      margin-bottom: 10px;
    }

    .capability p {
      color: rgba(245, 246, 255, 0.92);
      font-size: 14px;
    }

    .capability .fine {
      margin-top: 12px;
      font-size: 12.5px;
      color: rgba(245, 246, 255, 0.72);
      line-height: 1.55;
    }

    .related { display: grid; gap: 8px; }

    .related a {
      display: flex;
      justify-content: space-between;
      align-items: center;
      text-decoration: none;
      color: var(--ink);
      font-size: 14.5px;
      padding: 12px 4px;
      border-bottom: 1px solid var(--line);
    }

    .related a span {
      color: var(--brand-blue);
      font-size: 13px;
    }

    .foot-note {
      margin-top: 22px;
      padding-top: 14px;
      border-top: 1px solid var(--line);
      font-size: 12px;
      color: var(--ink-soft);
      line-height: 1.55;
    }

    .dock {
      position: fixed;
      left: 0;
      right: 0;
      bottom: 0;
      padding: 10px 18px calc(10px + var(--safe-b));
      background: rgba(244, 245, 251, 0.94);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border-top: 1px solid var(--line);
      z-index: 20;
    }

    .dock-inner {
      width: min(100%, 440px);
      margin: 0 auto;
      display: grid;
      grid-template-columns: 1fr 1.35fr;
      gap: 10px;
    }

    .btn {
      appearance: none;
      border: 0;
      cursor: pointer;
      text-align: center;
      text-decoration: none;
      font-family: inherit;
      font-size: 14.5px;
      font-weight: 600;
      padding: 13px 12px;
      transition: transform 0.15s ease, opacity 0.15s ease;
    }

    .btn:active { transform: scale(0.98); }

    .btn-ghost {
      background: transparent;
      color: var(--brand-blue);
      border: 1px solid rgba(16, 16, 168, 0.35);
    }

    .btn-primary {
      background: var(--cta);
      color: #fff;
    }

    .toc {
      display: flex;
      gap: 8px;
      overflow-x: auto;
      padding: 4px 0 2px;
      margin: 16px 0 4px;
      scrollbar-width: none;
    }

    .toc::-webkit-scrollbar { display: none; }

    .toc a {
      flex: 0 0 auto;
      text-decoration: none;
      font-size: 12.5px;
      color: var(--brand-blue);
      background: rgba(255, 255, 255, 0.85);
      border: 1px solid rgba(16, 16, 168, 0.22);
      padding: 6px 11px;
      white-space: nowrap;
    }