:root {
    --bg: #FCFBF8;
    --bg-card: #FFFFFF;
    --bg-card-hi: #FFFCF3;
    --line: #E8E4D8;
    --line-soft: #EFECE3;
    --text: #26231C;
    --text-soft: #6E695C;
    --text-dim: #9B9585;
    --gold: #A9812F;
    --gold-hi: #C0973B;
    --gold-dim: #CDB87F;
    --gold-wash: rgba(169, 129, 47, 0.07);
    --green: #3E8E5C;
    --shadow: 0 1px 3px rgba(60, 45, 15, 0.06), 0 4px 14px rgba(60, 45, 15, 0.04);
    --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    --serif: Georgia, "Times New Roman", "Songti SC", serif;
    --mono: ui-monospace, "SF Mono", "Menlo", "Cascadia Mono", monospace;
  }

  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .tool:hover, .svc:hover, .plat:hover { transform: none !important; }
  }

  body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    font-size: 16px;
    line-height: 1.85;
    -webkit-font-smoothing: antialiased;
  }

  .wrap { max-width: 960px; margin: 0 auto; padding: 0 24px; }

  a { color: var(--gold); text-decoration: none; }
  a:hover { color: var(--gold-hi); }
  a:focus-visible, button:focus-visible {
    outline: 2px solid var(--gold);
    outline-offset: 3px;
    border-radius: 2px;
  }

  .gold-text {
    background: linear-gradient(135deg, #C89A3A 15%, var(--gold) 55%, #7E5E1F 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  /* ---------- header ---------- */
  header.top {
    position: sticky; top: 0; z-index: 10;
    background: rgba(252, 251, 248, 0.88);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line-soft);
  }
  .top-inner {
    display: flex; align-items: center; justify-content: space-between;
    gap: 16px; padding: 16px 0;
  }
  .brand {
    font-family: var(--mono); font-size: 13px; font-weight: 700;
    letter-spacing: 0.3em; color: var(--gold);
  }
  nav.menu { display: flex; gap: 24px; font-size: 14px; }
  nav.menu a { color: var(--text-soft); }
  nav.menu a:hover { color: var(--gold); }

  /* ---------- eyebrow ---------- */
  .eyebrow {
    display: flex; align-items: center; gap: 12px;
    font-family: var(--mono); font-size: 12px; letter-spacing: 0.28em;
    color: var(--gold); text-transform: uppercase; margin: 0 0 22px;
  }
  .eyebrow::before {
    content: ""; width: 28px; height: 1px; background: var(--gold);
    flex-shrink: 0;
  }

  /* ---------- hero ---------- */
  .hero { padding: 84px 0 64px; border-bottom: 1px solid var(--line-soft); }
  h1 {
    font-size: clamp(48px, 9vw, 84px); line-height: 1.1;
    margin: 0 0 14px; font-weight: 800; letter-spacing: 0.01em;
  }
  h1 .en { font-family: var(--serif); font-weight: 700; color: var(--text); }
  .role {
    font-size: 18px; color: var(--text-soft); letter-spacing: 0.35em;
    margin: 0 0 18px;
  }
  .hero-line {
    max-width: 36em; color: var(--text-soft); margin: 0 0 42px; text-wrap: pretty;
  }
  .hero-line b { color: var(--text); font-weight: 600; }

  .stats { display: flex; gap: 64px; flex-wrap: wrap; margin-bottom: 44px; }
  .stat .num {
    font-size: 40px; font-weight: 800; line-height: 1.2;
    font-variant-numeric: tabular-nums;
  }
  .stat .num small { font-size: 20px; font-weight: 600; }
  .stat .cap { font-size: 14px; color: var(--text-soft); margin-top: 2px; }
  .stat .sub { font-size: 12px; color: var(--text-dim); }

  .cta-row { display: flex; gap: 14px; flex-wrap: wrap; }
  .btn {
    display: inline-block; padding: 13px 30px; font-size: 15px;
    border-radius: 3px; border: 1px solid var(--gold-dim);
    background: transparent; color: var(--gold); cursor: pointer;
    font-family: var(--sans);
  }
  .btn:hover { border-color: var(--gold); color: var(--gold-hi); }
  .btn.primary {
    background: linear-gradient(135deg, #C89A3A, var(--gold) 55%, #8A6624);
    color: #FFFDF5; font-weight: 700; border: none;
    box-shadow: var(--shadow);
  }
  .btn.primary:hover { filter: brightness(1.06); color: #FFFDF5; }

  /* ---------- sections ---------- */
  section { padding: 72px 0; border-bottom: 1px solid var(--line-soft); }
  h2 {
    font-size: clamp(28px, 4.5vw, 38px); font-weight: 800;
    margin: 0 0 12px; letter-spacing: 0.02em; text-wrap: balance;
  }
  .sec-intro { color: var(--text-soft); max-width: 40em; margin: 0 0 40px; }
  .sec-intro b { color: var(--gold); font-weight: 600; }

  /* ---------- tools / discount codes ---------- */
  .tool-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
  .tool {
    background: var(--bg-card); border: 1px solid var(--line);
    box-shadow: var(--shadow);
    border-radius: 6px; padding: 24px 24px 20px;
    display: flex; flex-direction: column; gap: 10px;
    transition: transform 0.18s ease, border-color 0.18s ease;
  }
  .tool:hover { transform: translateY(-2px); border-color: var(--gold-dim); }
  .tool.featured { border-color: var(--gold-dim); background: var(--bg-card-hi); }
  .tool-head { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
  .tool h3 { font-size: 19px; font-weight: 700; margin: 0; }
  .tool .kind { font-size: 12px; color: var(--text-dim); letter-spacing: 0.06em; white-space: nowrap; }
  .tool .pitch { font-size: 14px; color: var(--text-soft); margin: 0; }
  .tool .flag {
    display: inline-block; font-size: 11px; color: var(--gold);
    border: 1px solid var(--gold-dim); border-radius: 2px;
    padding: 0 7px; margin-left: 8px; vertical-align: 2px; letter-spacing: 0.08em;
  }
  .code-row {
    display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
    margin-top: auto; padding-top: 12px; border-top: 1px dashed var(--line);
  }
  .code {
    font-family: var(--mono); font-size: 15px; font-weight: 700;
    color: var(--gold-hi); background: var(--gold-wash);
    border: 1px dashed var(--gold-dim); border-radius: 3px;
    padding: 3px 12px; letter-spacing: 0.1em;
  }
  .code-note { font-size: 13px; color: var(--text-soft); }
  .copy-btn {
    font-family: var(--sans); font-size: 12px; cursor: pointer;
    color: var(--text-soft); background: none;
    border: 1px solid var(--line); border-radius: 3px; padding: 3px 12px;
    margin-left: auto; transition: color 0.15s, border-color 0.15s;
  }
  .copy-btn:hover { color: var(--gold); border-color: var(--gold-dim); }
  .copy-btn.done { color: var(--green); border-color: var(--green); }
  .tool .price { font-size: 12.5px; color: var(--text-dim); margin: 0; }
  .disclosure {
    margin: 28px 0 0; font-size: 13px; color: var(--text-dim);
    padding-left: 14px; border-left: 2px solid var(--gold-dim);
  }

  /* ---------- services ---------- */
  .svc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
  .svc {
    background: var(--bg-card); border: 1px solid var(--line);
    box-shadow: var(--shadow);
    border-radius: 6px; padding: 26px;
    transition: transform 0.18s ease, border-color 0.18s ease;
  }
  .svc:hover { transform: translateY(-2px); border-color: var(--gold-dim); }
  .svc .no {
    font-family: var(--mono); font-size: 12px; color: var(--text-dim);
    letter-spacing: 0.2em; display: block; margin-bottom: 14px;
  }
  .svc h3 { font-size: 19px; font-weight: 700; margin: 0 0 10px; }
  .svc p { font-size: 14px; color: var(--text-soft); margin: 0 0 10px; }
  .svc .fit { font-size: 13px; color: var(--text-dim); margin: 0; }
  .svc .fit::before { content: "适合 — "; color: var(--gold); }

  /* ---------- skills ---------- */
  .skill-grid {
    display: grid; grid-template-columns: 1fr 1fr;
    border: 1px solid var(--line); border-radius: 6px; overflow: hidden;
    box-shadow: var(--shadow);
  }
  .skill {
    padding: 26px 28px; border-bottom: 1px solid var(--line);
    background: var(--bg-card);
  }
  .skill:nth-child(odd) { border-right: 1px solid var(--line); }
  .skill:nth-last-child(-n+2) { border-bottom: none; }
  .skill .no {
    font-family: var(--mono); font-size: 11px; color: var(--gold-dim);
    letter-spacing: 0.25em; display: block; margin-bottom: 10px;
  }
  .skill h3 { font-size: 17px; font-weight: 700; margin: 0 0 6px; }
  .skill p { font-size: 13.5px; color: var(--text-soft); margin: 0; }

  /* ---------- categories & platforms ---------- */
  .chip-row { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 20px; }
  .chip {
    font-size: 14px; color: var(--text);
    border: 1px solid var(--line); border-radius: 999px;
    padding: 7px 20px;
  }
  .pill {
    display: inline-flex; align-items: baseline; gap: 8px;
    font-size: 14px; background: var(--bg-card);
    border: 1px solid var(--line); border-radius: 4px; padding: 8px 16px;
  }
  .pill .dot { width: 7px; height: 7px; border-radius: 50%; align-self: center; }
  .pill small { color: var(--text-dim); }

  /* ---------- roadmap ---------- */
  .road-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
  .road {
    border: 1px dashed var(--gold-dim); border-radius: 6px;
    padding: 26px; background: var(--gold-wash);
  }
  .road .tag {
    font-family: var(--mono); font-size: 11px; letter-spacing: 0.2em;
    color: var(--gold); display: block; margin-bottom: 12px;
  }
  .road h3 { font-size: 19px; margin: 0 0 8px; }
  .road p { font-size: 14px; color: var(--text-soft); margin: 0; }

  /* ---------- platforms ---------- */
  .plat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
  .plat {
    background: var(--bg-card); border: 1px solid var(--line);
    box-shadow: var(--shadow);
    border-radius: 6px; padding: 24px; display: block;
    transition: transform 0.18s ease, border-color 0.18s ease;
  }
  .plat:hover { transform: translateY(-2px); border-color: var(--gold-dim); }
  .plat .kind {
    font-family: var(--mono); font-size: 11px; letter-spacing: 0.2em;
    color: var(--gold); margin: 0 0 10px; text-transform: uppercase;
  }
  .plat h3 { font-size: 17px; margin: 0 0 4px; color: var(--text); }
  .plat .handle { font-family: var(--mono); font-size: 12.5px; color: var(--text-dim); margin: 0 0 8px; }
  .plat p { margin: 0; font-size: 13.5px; color: var(--text-soft); }
  .plat .main-flag {
    display: inline-block; font-size: 11px; color: var(--gold);
    border: 1px solid var(--gold-dim); border-radius: 2px;
    padding: 0 6px; margin-left: 8px; vertical-align: 1px;
  }

  /* ---------- contact ---------- */
  #contact { border-bottom: none; text-align: center; padding: 88px 0; }
  #contact h2 { margin-bottom: 8px; }
  #contact h2 .gold-text { font-weight: 800; }
  .contact-sub { color: var(--text-soft); margin: 0 0 36px; }
  .contact-rows {
    display: flex; flex-direction: column; gap: 12px;
    max-width: 460px; margin: 36px auto 0; text-align: left;
  }
  .c-row {
    display: flex; gap: 18px; align-items: baseline;
    padding: 12px 20px; background: var(--bg-card);
    border: 1px solid var(--line); border-radius: 4px;
  }
  .c-key {
    font-family: var(--mono); font-size: 11px; letter-spacing: 0.15em;
    color: var(--text-dim); width: 72px; flex-shrink: 0;
  }
  .placeholder {
    color: var(--gold); background: var(--gold-wash);
    border: 1px dashed var(--gold-dim); border-radius: 2px;
    padding: 1px 10px; font-size: 14px;
  }

  footer {
    padding: 30px 0 48px; font-size: 12.5px; color: var(--text-dim);
    display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
    border-top: 1px solid var(--line-soft);
  }
  footer .mono { font-family: var(--mono); letter-spacing: 0.2em; font-size: 11px; }

  /* ---------- responsive ---------- */
  @media (max-width: 760px) {
    .hero { padding: 56px 0 48px; }
    .stats { gap: 32px; }
    .stat .num { font-size: 32px; }
    .tool-grid, .svc-grid, .road-grid, .plat-grid { grid-template-columns: 1fr; }
    .skill-grid { grid-template-columns: 1fr; }
    .skill:nth-child(odd) { border-right: none; }
    .skill:nth-last-child(-n+2) { border-bottom: 1px solid var(--line); }
    .skill:last-child { border-bottom: none; }
    nav.menu { gap: 14px; font-size: 13px; }
    section { padding: 56px 0; }
  }