:root {
      --bg: #0b0c14;
      --text: #f3f2ff;
      --muted: #a6a5b8;
      --purple: #a396ff;
      --line: #292936;
      --panel: #10111a;
      --content: 1336px;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      background: var(--bg);
      color: var(--text);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      font-size: 16px;
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; }
    a:focus-visible, button:focus-visible, summary:focus-visible, select:focus-visible {
      outline: 2px solid var(--purple);
      outline-offset: 4px;
    }
    .wrap {
      width: min(var(--content), calc(100% - 96px));
      margin-inline: auto;
    }
    .site-header {
      height: 84px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand {
      display: inline-flex;
      align-items: baseline;
      gap: 14px;
      color: var(--text);
      font-size: 32px;
      font-weight: 700;
      letter-spacing: -.04em;
      text-decoration: none;
      white-space: nowrap;
    }
    .brand small { color: var(--muted); font-size: 17px; font-weight: 400; letter-spacing: 0; }
    .nav { display: flex; align-items: center; gap: 42px; }
    .nav a { color: var(--muted); font-size: 16px; text-decoration: none; }
    .nav a:hover { color: var(--text); }
    .nav .nav-contact {
      min-height: 48px;
      min-width: 146px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--text);
      color: var(--text);
    }

    .hero {
      position: relative;
      min-height: 558px;
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(320px, .86fr);
      align-items: center;
      border-bottom: 1px solid var(--line);
    }
    .hero-copy { padding: 110px 0 56px; position: relative; z-index: 1; }
    h1 {
      margin: 0 0 22px;
      font-size: clamp(44px, 7vw, 100px);
      line-height: 1.08;
      letter-spacing: -.055em;
      font-weight: 760;
    }
    h1 span { color: var(--purple); display: block; }
    .hero-copy > p { margin: 0 0 44px; color: var(--muted); font-size: 28px; }
    .actions { display: flex; flex-wrap: wrap; gap: 24px; }
    .button {
      min-height: 64px;
      min-width: 246px;
      padding: 0 28px;
      display: inline-flex;
      align-items: center;
      justify-content: space-between;
      gap: 28px;
      border: 1px solid var(--text);
      color: var(--text);
      font-size: 17px;
      font-weight: 600;
      text-decoration: none;
    }
    .button { border-radius: 5px; }
    .button.primary { border-color: var(--purple); background: var(--purple); color: #0b0c14; }
    .button:hover { filter: brightness(1.1); }
    .hero-mark { justify-self: end; position: relative; width: 410px; height: 360px; user-select: none; }
    .hero-mark .mark-m, .hero-mark .mark-b {
      position: absolute;
      color: #222332;
      font-size: 250px;
      font-weight: 800;
      line-height: .85;
      letter-spacing: -.12em;
    }
    .hero-mark .mark-m { left: 0; top: 0; }
    .hero-mark .mark-b { right: -4px; bottom: 4px; }
    .hero-mark .slash {
      position: absolute;
      top: 36px;
      left: 190px;
      width: 8px;
      height: 280px;
      background: #343549;
      transform: rotate(28deg);
      transform-origin: center;
    }

    section { scroll-margin-top: 28px; }
    .services { padding: 66px 0 48px; }
    .section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 24px; margin-bottom: 26px; }
    h2 { margin: 0; font-size: 38px; line-height: 1.25; letter-spacing: -.045em; }
    .section-heading p { margin: 0; color: var(--muted); font-size: 16px; }
    .service-grid { display: grid; grid-template-columns: 1fr 1fr; }
    .service {
      min-height: 260px;
      border-top: 3px solid var(--purple);
      padding: 24px 34px 24px 0;
      display: flex;
      flex-direction: column;
    }
    .service + .service { border-top-color: var(--text); border-left: 1px solid var(--line); padding-left: 25px; }
    .eyebrow { color: var(--muted); font-size: 16px; }
    .service h3 { margin: 12px 0 10px; font-size: 40px; line-height: 1.2; letter-spacing: -.04em; }
    .service p { margin: 0; color: var(--muted); font-size: 21px; }
    .service .service-foot { margin-top: auto; display: flex; justify-content: space-between; align-items: end; gap: 20px; color: var(--muted); font-size: 16px; }
    .service .service-link { color: var(--purple); text-decoration: none; border-bottom: 1px solid var(--purple); padding-bottom: 4px; white-space: nowrap; }

    .guide { border-top: 1px solid var(--line); padding: 96px 0 24px; }
    .guide-grid { display: grid; grid-template-columns: minmax(0, .95fr) minmax(420px, 1fr); gap: 76px; align-items: start; }
    .guide-intro h2 { font-size: 48px; }
    .guide-intro > p { margin: 12px 0 42px; color: var(--muted); font-size: 24px; }
    .steps { margin: 0; padding: 0; list-style: none; }
    .step { position: relative; display: grid; grid-template-columns: 66px 1fr; min-height: 114px; }
    .step:not(:last-child)::before { content: ""; position: absolute; left: 16px; top: 23px; bottom: -2px; width: 1px; background: #50506a; }
    .step-number { position: relative; z-index: 1; color: var(--purple); font-size: 19px; }
    .step-number::before { content: ""; position: absolute; left: -2px; top: 7px; width: 12px; height: 12px; border-radius: 50%; background: var(--purple); }
    .step-number span { display: inline-block; margin-left: 30px; }
    .step h3 { margin: 0 0 7px; font-size: 23px; }
    .step p { margin: 0; color: var(--muted); font-size: 17px; }
    .config-panel, .contact-card { border: 1px solid #48495d; border-radius: 10px; background: var(--panel); }
    .config-panel { padding: 28px; }
    .config-panel h3 { margin: 0 0 18px; font-size: 24px; }
    .endpoint-row { min-height: 66px; padding: 0 12px 0 20px; display: flex; align-items: center; justify-content: space-between; gap: 12px; border: 1px solid #48495d; border-radius: 8px; }
    .endpoint { overflow-wrap: anywhere; color: var(--text); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 18px; }
    .copy-button { min-height: 40px; padding: 0 18px; border: 1px solid var(--purple); border-radius: 5px; background: transparent; color: var(--purple); font: inherit; cursor: pointer; white-space: nowrap; }
    .copy-button:hover { background: rgba(163,150,255,.12); }
    .copy-status { min-height: 24px; margin: 10px 0 0; color: var(--muted); font-size: 14px; }
    .config-panel hr { margin: 12px 0 18px; border: 0; border-top: 1px solid var(--line); }
    .config-note { margin: 0 0 18px; color: var(--muted); font-size: 16px; }
    .config-line { display: grid; grid-template-columns: 145px 1fr; padding: 12px 0; border-top: 1px solid var(--line); gap: 20px; }
    .config-line strong { font-size: 16px; }
    .config-line span { color: var(--muted); font-size: 16px; }
    .config-link { display: inline-block; margin-top: 14px; color: var(--purple); font-size: 18px; text-decoration: none; }
    .quick-start-link { display: inline-flex; align-items: center; min-height: 44px; margin-top: 16px; color: var(--purple); text-underline-offset: 5px; }
    .agent-code { margin: 20px 0 0; padding: 24px; border: 1px solid #48495d; border-radius: 8px; background: var(--panel); white-space: pre-wrap; overflow-wrap: anywhere; font: 14px/1.8 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

    [hidden] { display: none !important; }
    .model-overview { border-top: 1px solid var(--line); padding: 52px 0; }
    .model-overview h2 { font-size: 32px; }
    .model-overview p, .example-panel p { color: var(--muted); }
    .model-facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; margin-top: 28px; }
    .model-facts article { border-top: 2px solid var(--purple); padding-top: 20px; }
    .model-facts h3 { margin: 0 0 10px; font-size: 22px; }
    .model-facts p { margin: 0; font-size: 16px; }
    .model-list { display: flex; flex-wrap: wrap; gap: 10px; margin: 24px 0 16px; }
    .model-list span { border: 1px solid #48495d; border-radius: 5px; padding: 7px 12px; }
    .source-note { font-size: 13px; color: var(--muted); }
    .source-note a { text-underline-offset: 4px; }
    .example-picker { margin-top: 32px; padding-top: 28px; border-top: 1px solid var(--line); }
    .example-picker label { display: block; font-size: 24px; font-weight: 650; margin-bottom: 12px; }
    .example-picker select { min-height: 48px; width: min(100%, 400px); padding: 10px 14px; border: 1px solid var(--purple); border-radius: 5px; background: var(--panel); color: var(--text); font: inherit; }
    .example-panel { min-width: 0; margin-top: 24px; }
    .example-panel h3 { margin: 0 0 8px; font-size: 24px; }
    .example-panel .copy-button { margin-top: 16px; }
    .example-panel code:not(pre code) { overflow-wrap: anywhere; }
    @media (max-width: 850px) { .model-facts { grid-template-columns: 1fr; gap: 24px; } .model-overview h2 { font-size: 28px; } .agent-code { padding: 18px; } }

    .lower { border-top: 1px solid var(--line); padding: 36px 0 32px; }
    .lower-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(320px, .8fr); gap: 38px; align-items: start; }
    .faq h2 { margin-bottom: 22px; font-size: 42px; }
    details { border-top: 1px solid #48495d; }
    details:last-child { border-bottom: 1px solid #48495d; }
    summary { min-height: 92px; display: flex; align-items: center; justify-content: space-between; gap: 20px; cursor: pointer; list-style: none; font-size: 21px; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; color: var(--text); font-size: 30px; font-weight: 300; }
    details[open] summary::after { content: "−"; }
    details p { margin: -8px 0 24px; max-width: 690px; color: var(--muted); font-size: 16px; }
    .contact-card { padding: 27px 32px 23px; text-align: center; }
    .contact-card h3 { margin: 0 0 7px; text-align: left; font-size: 27px; }
    .contact-card p { margin: 0 0 20px; color: var(--muted); text-align: left; font-size: 17px; }
    .qr { width: 160px; height: auto; display: block; margin: 0 auto 10px; background: #fff; padding: 8px; }
    .qr-caption { margin: 0 0 10px !important; color: var(--text) !important; text-align: center !important; font-size: 16px !important; }
    .qr-note { margin-bottom: 12px !important; text-align: center !important; font-size: 14px !important; }
    .qr-download { color: var(--purple); font-size: 15px; text-decoration: none; border-bottom: 1px solid var(--purple); }
    footer { border-top: 1px solid var(--line); padding: 30px 0 34px; display: flex; justify-content: space-between; gap: 24px; color: var(--muted); font-size: 15px; }
    footer strong { color: var(--text); }

    @media (max-width: 1050px) {
      .nav { gap: 22px; }
      .brand { font-size: 24px; gap: 10px; }
      .brand small { font-size: 14px; }
      .hero { grid-template-columns: minmax(0, 1fr) 250px; }
      .hero-mark { transform: scale(.7); transform-origin: right center; }
      .hero-copy > p { font-size: 20px; }
      .guide-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
      .endpoint-row { flex-wrap: wrap; padding: 14px; }
      .service .service-foot { align-items: flex-start; flex-direction: column; gap: 14px; margin-top: 28px; }
      .guide-intro h2 { font-size: 34px; }
      .guide-intro > p { font-size: 18px; }
      .config-line { grid-template-columns: 1fr; gap: 6px; }
    }
    @media (max-width: 850px) {
      .wrap { width: calc(100% - 44px); }
      .site-header { height: 72px; }
      .brand { font-size: 23px; gap: 8px; }
      .brand small { font-size: 14px; }
      .nav { gap: 0; }
      .nav a:not(.nav-contact) { display: none; }
      .nav .nav-contact { min-width: 82px; min-height: 44px; font-size: 14px; }
      .hero { display: block; min-height: 0; }
      .hero-copy { padding: 86px 0 74px; }
      h1 { margin-bottom: 19px; font-size: clamp(38px, 11vw, 46px); line-height: 1.2; letter-spacing: -.07em; }
      .hero-copy > p { margin-bottom: 32px; font-size: 17px; }
      .actions { gap: 12px; }
      .button { min-width: 0; min-height: 54px; flex: 1 1 160px; padding: 0 16px; font-size: 15px; }
      .hero-mark { display: none; }
      .services { padding: 55px 0 30px; }
      .section-heading { display: block; margin-bottom: 22px; }
      h2, .faq h2 { font-size: 30px; }
      .section-heading p { margin-top: 8px; font-size: 15px; }
      .service-grid { display: block; }
      .service, .service + .service { min-height: 235px; padding: 22px 0 24px; border-left: 0; }
      .service h3 { font-size: 30px; }
      .service p { font-size: 16px; }
      .service .service-foot { font-size: 14px; }
      .guide { padding: 65px 0 34px; }
      .guide-grid, .lower-grid { display: block; }
      .guide-intro h2 { font-size: 34px; }
      .guide-intro > p { margin-bottom: 35px; font-size: 17px; }
      .step { grid-template-columns: 58px 1fr; min-height: 108px; }
      .step h3 { font-size: 20px; }
      .step p { font-size: 15px; }
      .config-panel { margin-top: 16px; padding: 22px 18px; }
      .config-panel h3 { font-size: 22px; }
      .endpoint-row { padding-left: 12px; }
      .endpoint { font-size: 14px; }
      .copy-button { padding: 0 10px; font-size: 14px; }
      .config-line { grid-template-columns: 92px 1fr; gap: 10px; }
      .config-line strong, .config-line span { font-size: 14px; }
      .lower { padding-top: 34px; }
      .faq { margin-bottom: 32px; }
      summary { min-height: 74px; font-size: 17px; }
      details p { font-size: 15px; }
      .contact-card { padding: 22px 18px; }
      .contact-card h3 { font-size: 24px; }
      footer { display: grid; grid-template-columns: 1fr 1fr; padding: 25px 0 30px; font-size: 13px; }
      footer span:nth-child(2) { text-align: right; }
      footer span:last-child { grid-column: 1 / -1; }
    }
    @media (max-width: 340px) {
      .wrap { width: calc(100% - 36px); }
      .brand { font-size: 20px; }
      .brand small { font-size: 12px; }
      .nav .nav-contact { min-width: 74px; }
      .hero-copy { padding-top: 68px; }
      h1 { font-size: 38px; }
      .hero-copy > p { font-size: 16px; }
      .actions { display: grid; }
      .button { width: 100%; }
      .endpoint-row { display: block; padding: 12px; }
      .copy-button { width: 100%; margin-top: 10px; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
    }
.tutorial-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; list-style: none; padding: 0; margin: 24px 0; counter-reset: tutorial; }
.tutorial-steps li { border-top: 1px solid var(--line); padding-top: 16px; counter-increment: tutorial; }
.tutorial-steps li::before { content: "0" counter(tutorial); display: block; color: var(--purple); margin-bottom: 8px; }
.tutorial-steps strong { display: block; margin-bottom: 6px; font-size: 18px; }
.tutorial-steps p { margin: 0; font-size: 15px; }
.catalog-header { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding-block: 24px; border-bottom: 1px solid var(--line); }
.catalog-header a { min-height: 44px; display: inline-flex; align-items: center; }
.catalog-intro { padding-block: 64px 32px; }
.catalog-intro h1 { font-size: clamp(36px, 6vw, 64px); letter-spacing: -.04em; }
.catalog-intro p { color: var(--muted); max-width: 740px; }
.catalog-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; padding-bottom: 40px; }
.catalog-card { border: 1px solid #48495d; background: var(--panel); border-radius: 10px; padding: 28px; }
.catalog-card h2 { font-size: 28px; }
.catalog-card ul { padding-left: 22px; line-height: 2; }
.catalog-note { padding: 24px 0 48px; border-top: 1px solid var(--line); color: var(--muted); }
@media (max-width: 850px) { .tutorial-steps, .catalog-grid { grid-template-columns: 1fr; } .catalog-header .brand small { display: none; } .catalog-intro { padding-top: 40px; } }

/* The home page gives both businesses identical space and controls. */
.home-hero { padding: 56px 0 38px; }
.home-hero h1 { font-size: clamp(40px, 5vw, 68px); line-height: 1.16; margin: 16px 0; }
.home-hero > p:last-child { color: var(--muted); font-size: 20px; }
.home-services, .process-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; }
.home-services { padding-bottom: 60px; }
.business-card { display: flex; flex-direction: column; min-width: 0; padding: 32px; background: var(--panel); border: 1px solid #48495d; border-top: 3px solid var(--purple); border-radius: 8px; }
.business-card h2 { font-size: 38px; margin: 20px 0 16px; }
.business-card > p { color: var(--muted); font-size: 18px; max-width: 480px; margin: 0; }
.business-card ul { padding-left: 20px; line-height: 2; margin: 24px 0 30px; color: var(--muted); }
.business-card .button { width: 100%; margin-top: auto; min-width: 0; }
.business-secondary { display: flex; align-items: center; justify-content: center; min-height: 48px; margin-top: 8px; color: var(--purple); text-decoration: none; }
.home-process { border-top: 1px solid var(--line); padding: 48px 0; }
.process-grid h3 { font-size: 25px; margin: 0 0 20px; }
.process-grid ol { padding-left: 24px; margin: 0; }
.process-grid li { padding: 0 0 18px 8px; }
.process-grid li::marker { color: var(--purple); }
.process-grid strong, .process-grid span { display: block; }
.process-grid span { margin-top: 5px; color: var(--muted); }
.guide-page .guide { border-top: 0; padding-top: 48px; }
.guide-page #guide-title { font-size: 48px; }
.guide-faq { padding: 40px 0; }
.price-section { padding-bottom: 32px; }
.price-section h2 { font-size: 28px; }
.price-basis { color: var(--purple); padding: 14px 18px; border-left: 3px solid var(--purple); background: var(--panel); }
.price-table { width: 100%; border-collapse: collapse; font-size: 17px; font-variant-numeric: tabular-nums; }
.price-table caption { text-align: left; color: var(--muted); font-size: 14px; padding: 12px 0 20px; }
.price-table th, .price-table td { padding: 18px 16px; border-bottom: 1px solid var(--line); text-align: right; }
.price-table th:first-child { text-align: left; }
.price-table thead { color: var(--muted); background: var(--panel); }
.price-table tbody th { font-weight: 550; }
.price-explainer { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; padding-top: 16px; color: var(--muted); font-size: 15px; }
.price-explainer strong { color: var(--text); }
@media (max-width: 850px) {
  .home-services, .process-grid { grid-template-columns: 1fr; gap: 24px; }
  .business-card { padding: 24px; }
  .business-card h2 { font-size: 32px; }
  .business-card > p { font-size: 16px; }
  .home-hero { padding-top: 32px; }
  .home-hero > p:last-child { font-size: 17px; }
  .home-services { padding-bottom: 36px; }
  .price-explainer { grid-template-columns: 1fr; gap: 0; }
}
@media (max-width: 600px) {
  .price-table thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
  .price-table tbody, .price-table tr { display: block; }
  .price-table tr { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid #48495d; border-radius: 8px; margin-bottom: 16px; padding: 12px; background: var(--panel); }
  .price-table tbody th { grid-column: 1 / -1; padding: 8px 4px 14px; }
  .price-table td { display: block; text-align: left; border: 0; padding: 12px 4px; }
  .price-table td::before { content: attr(data-label); display: block; color: var(--muted); font-size: 13px; margin-bottom: 4px; }
}

.discount-summary { display: flex; align-items: center; justify-content: space-between; gap: 28px; padding: 28px 32px; margin-bottom: 32px; border: 1px solid #35634d; border-radius: 10px; background: #10251c; color: #a8efc7; }
.discount-summary span { display: block; font-size: 16px; }
.discount-summary strong { display: block; font-size: clamp(30px, 4vw, 48px); line-height: 1.25; margin-top: 8px; }
.discount-summary p { margin: 0; line-height: 1.7; }
.discount-badge { display: table; margin-top: 8px; padding: 3px 9px; border: 1px solid #35634d; border-radius: 4px; background: #10251c; color: #a8efc7; font-size: 13px; font-weight: 650; white-space: nowrap; }
.current-price { color: var(--text); font-weight: 650; }
.official-price { display: block; margin-top: 5px; color: var(--muted); font-size: 12px; white-space: nowrap; }
.discount-note { line-height: 1.7; margin-top: 20px; }
@media (max-width: 600px) { .discount-summary { display: block; padding: 22px; } .discount-summary p { margin-top: 16px; font-size: 14px; } }