:root {
        color-scheme: light;
        --ink: #173b3f;
        --muted: #607478;
        --paper: #fffdf8;
        --line: #ded8ca;
        --accent: #b47b27;
      }
      * { box-sizing: border-box; }
      body {
        margin: 0;
        min-height: 100vh;
        color: var(--ink);
        background: #edf2ef;
        font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
      }
      main { min-height: calc(100vh - 76px); }
      .hero {
        padding: 88px 24px 76px;
        background: linear-gradient(135deg, #173f43, #28585b);
        color: #fffdf8;
      }
      .wrap { width: min(1040px, 100%); margin: 0 auto; }
      .eyebrow { color: #e0ad55; letter-spacing: .18em; font-size: 14px; }
      h1 { margin: 22px 0 14px; font-size: clamp(34px, 6vw, 64px); font-weight: 600; }
      .lead { max-width: 720px; margin: 0; color: #d8e3e1; font-size: 18px; line-height: 1.9; }
      .content { padding: 58px 24px 72px; }
      h2 { margin: 0 0 14px; font-size: 28px; }
      .intro { max-width: 800px; margin: 0 0 34px; color: var(--muted); line-height: 1.9; }
      .grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
      .card { min-height: 156px; padding: 26px 22px; background: var(--paper); border: 1px solid var(--line); }
      .card strong { display: block; margin-bottom: 14px; color: var(--accent); font-size: 18px; }
      .card span { color: var(--muted); line-height: 1.7; }
      footer { padding: 26px 20px; text-align: center; color: #667477; background: #fff; border-top: 1px solid #e5e5e5; font-size: 14px; }
      footer p { margin: 5px 0; }
      footer a { color: #465f63; text-decoration: none; }
      footer a:hover { text-decoration: underline; }
      @media (max-width: 760px) {
        .hero { padding-top: 62px; }
        .grid { grid-template-columns: 1fr 1fr; }
      }
      @media (max-width: 460px) { .grid { grid-template-columns: 1fr; } }