/* 用途：逆向分析和AI咨询复用的服务详情视觉层。 */

    :root {
      --bg: #f8f7f4;
      --surface: #ffffff;
      --fg: #18181b;
      --muted: #6f6d68;
      --border: #d9d6cf;
      --accent: #e8441f;
      --accent-soft: #f6d8cf;
      --dark: #202023;
      --max-width: 1180px;
    }

    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      overflow-x: hidden;
    }

    body {
      min-width: 0;
      overflow-x: hidden;
      background: var(--bg);
      color: var(--fg);
      font-family: "Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      font-size: 16px;
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    .wrap {
      width: min(var(--max-width), calc(100% - 64px));
      margin: 0 auto;
    }

    .nav {
      position: sticky;
      top: 0;
      z-index: 20;
      border-bottom: 1px solid rgba(24, 24, 27, 0.12);
      background: rgba(248, 247, 244, 0.92);
      backdrop-filter: blur(16px);
    }

    .nav-inner {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 28px;
    }

    .nav-logo {
      display: flex;
      align-items: baseline;
      gap: 12px;
      min-width: 0;
    }

    .nav-logo strong {
      font-size: 1.05rem;
      letter-spacing: -0.03em;
      white-space: nowrap;
    }

    .nav-logo span {
      max-width: 440px;
      overflow: hidden;
      color: var(--muted);
      font-size: 0.72rem;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 24px;
      color: var(--muted);
      font-size: 0.84rem;
      white-space: nowrap;
    }

    .nav-links a {
      transition: color 0.2s ease;
    }

    .nav-links a:hover,
    .nav-links a:focus-visible {
      color: var(--accent);
    }

    .hero {
      padding: 110px 0 94px;
      border-bottom: 1px solid var(--border);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.55fr) minmax(260px, 0.65fr);
      gap: 72px;
      align-items: end;
    }

    .eyebrow {
      margin-bottom: 24px;
      color: var(--accent);
      font-size: 0.76rem;
      font-weight: 700;
      letter-spacing: 0.18em;
      text-transform: uppercase;
    }

    .hero h1 {
      max-width: 840px;
      font-size: clamp(3.6rem, 8.5vw, 7.8rem);
      font-weight: 800;
      letter-spacing: -0.075em;
      line-height: 0.91;
    }

    .hero h1 span {
      display: block;
    }

    .hero h1 .accent {
      color: var(--accent);
    }

    .hero-side {
      padding-bottom: 8px;
    }

    .hero-copy {
      margin-bottom: 30px;
      color: #4f4d49;
      font-size: 1.04rem;
    }

    .hero-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 32px;
    }

    .hero-tag {
      padding: 7px 12px;
      border: 1px solid var(--border);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.45);
      color: #55534f;
      font-size: 0.76rem;
      font-weight: 600;
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 12px;
      min-height: 50px;
      padding: 0 22px;
      border: 1px solid var(--fg);
      background: var(--fg);
      color: #fff;
      font-size: 0.88rem;
      font-weight: 650;
      transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
    }

    .btn-primary:hover,
    .btn-primary:focus-visible {
      border-color: var(--accent);
      background: var(--accent);
      transform: translateY(-2px);
    }

    .section {
      padding: 96px 0;
      border-bottom: 1px solid var(--border);
    }

    .section-head {
      display: grid;
      grid-template-columns: minmax(180px, 0.55fr) minmax(0, 1.45fr);
      gap: 48px;
      margin-bottom: 54px;
    }

    .section-index {
      color: var(--accent);
      font-size: 0.76rem;
      font-weight: 700;
      letter-spacing: 0.17em;
      text-transform: uppercase;
    }

    .section-title {
      max-width: 760px;
      font-size: clamp(2.2rem, 5vw, 4.4rem);
      font-weight: 750;
      letter-spacing: -0.055em;
      line-height: 1.14;
      text-wrap: balance;
    }

    .scope-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      border-top: 1px solid var(--fg);
      border-bottom: 1px solid var(--fg);
    }

    .scope-card {
      min-height: 330px;
      padding: 36px 32px 38px;
      border-right: 1px solid var(--border);
    }

    .scope-card:last-child {
      border-right: 0;
    }

    .scope-num {
      margin-bottom: 66px;
      color: var(--accent);
      font-size: 0.75rem;
      font-weight: 700;
    }

    .scope-card h3 {
      margin-bottom: 20px;
      font-size: 1.65rem;
      letter-spacing: -0.04em;
    }

    .scope-card p {
      color: var(--muted);
      font-size: 0.94rem;
    }

    .deliverables {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 1px;
      overflow: hidden;
      border: 1px solid var(--border);
      background: var(--border);
    }

    .deliverable {
      min-height: 156px;
      padding: 28px 30px;
      background: var(--surface);
    }

    .deliverable strong {
      display: block;
      margin-bottom: 9px;
      font-size: 1.08rem;
    }

    .deliverable p {
      color: var(--muted);
      font-size: 0.9rem;
    }

    .process-list {
      border-top: 1px solid var(--fg);
    }

    .process-item {
      display: grid;
      grid-template-columns: 88px minmax(180px, 0.65fr) minmax(0, 1.35fr);
      gap: 32px;
      align-items: start;
      padding: 30px 0;
      border-bottom: 1px solid var(--border);
    }

    .process-item .number {
      color: var(--accent);
      font-size: 0.8rem;
      font-weight: 700;
    }

    .process-item h3 {
      font-size: 1.12rem;
    }

    .process-item p {
      color: var(--muted);
      font-size: 0.94rem;
    }

    .notice-section {
      background: var(--dark);
      color: #fff;
    }

    .notice {
      display: grid;
      grid-template-columns: minmax(180px, 0.55fr) minmax(0, 1.45fr);
      gap: 48px;
    }

    .notice .section-index {
      color: #ff785b;
    }

    .notice blockquote {
      max-width: 820px;
      font-size: clamp(1.5rem, 3vw, 2.5rem);
      font-weight: 500;
      letter-spacing: -0.035em;
      line-height: 1.35;
    }

    .final-cta {
      padding: 92px 0;
      background: var(--accent);
      color: #fff;
    }

    .final-cta-inner {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 48px;
    }

    .final-cta h2 {
      max-width: 760px;
      font-size: clamp(2.7rem, 6.2vw, 6rem);
      font-weight: 800;
      letter-spacing: -0.065em;
      line-height: 0.95;
    }

    .final-cta .btn-primary {
      flex: 0 0 auto;
      border-color: #fff;
      background: #fff;
      color: var(--fg);
    }

    .final-cta .btn-primary:hover,
    .final-cta .btn-primary:focus-visible {
      border-color: var(--fg);
      background: var(--fg);
      color: #fff;
    }

    .footer {
      padding: 34px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.2);
      background: var(--accent);
      color: rgba(255, 255, 255, 0.82);
      font-size: 0.78rem;
    }

    .footer-inner {
      display: flex;
      justify-content: space-between;
      gap: 24px;
    }

    .footer a:hover,
    .footer a:focus-visible {
      color: #fff;
    }

    @media (max-width: 900px) {
      .hero-grid,
      .section-head,
      .notice {
        grid-template-columns: 1fr;
        gap: 34px;
      }

      .hero {
        padding: 82px 0 72px;
      }

      .scope-grid {
        grid-template-columns: 1fr;
      }

      .scope-card {
        min-height: 0;
        border-right: 0;
        border-bottom: 1px solid var(--border);
      }

      .scope-card:last-child {
        border-bottom: 0;
      }

      .scope-num {
        margin-bottom: 36px;
      }

      .final-cta-inner {
        align-items: flex-start;
        flex-direction: column;
      }
    }

    @media (max-width: 680px) {
      .wrap {
        width: min(var(--max-width), calc(100% - 40px));
      }

      .nav-inner {
        min-height: 64px;
      }

      .nav-logo span,
      .nav-links a:not(:first-child) {
        display: none;
      }

      .hero {
        padding: 64px 0 58px;
      }

      .hero h1 {
        font-size: clamp(3.25rem, 17vw, 5.2rem);
      }

      .section {
        padding: 72px 0;
      }

      .scope-card {
        padding: 30px 24px 32px;
      }

      .deliverables {
        grid-template-columns: 1fr;
      }

      .process-item {
        grid-template-columns: 48px minmax(0, 1fr);
        gap: 18px;
      }

      .process-item p {
        grid-column: 2;
      }

      .final-cta {
        padding: 72px 0;
      }

      .footer-inner {
        flex-direction: column;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      html {
        scroll-behavior: auto;
      }

      *, *::before, *::after {
        transition-duration: 0.01ms !important;
      }
    }