:root {
      --bg: #f8f6f1;
      --paper: #ffffff;
      --ink: #24211d;
      --muted: #6f6a61;
      --line: #e8e0d4;
      --soft: #fff8ec;
      --brand: #8f5b2f;
      --brand-deep: #68411f;
      --accent: #dba65d;
      --shadow: 0 18px 45px rgba(77, 52, 25, 0.08);
      --radius: 22px;
      --container: 1120px;
      --pad: clamp(18px, 4vw, 36px);
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      color: var(--ink);
      background:
        radial-gradient(circle at 12% 8%, rgba(219, 166, 93, 0.18), transparent 28%),
        radial-gradient(circle at 92% 18%, rgba(143, 91, 47, 0.12), transparent 30%),
        linear-gradient(180deg, #fbf7ef 0%, var(--bg) 42%, #fbfaf7 100%);
      line-height: 1.75;
      overflow-x: hidden;
    }

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

    .container {
      width: min(100% - var(--pad) * 2, var(--container));
      margin-inline: auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(248, 246, 241, 0.86);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(232, 224, 212, 0.78);
    }

    .nav {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      letter-spacing: 0.02em;
      white-space: nowrap;
      color: var(--brand-deep);
    }

    .brand-mark {
      width: 34px;
      height: 34px;
      border-radius: 12px;
      background: linear-gradient(135deg, #dba65d, #8f5b2f);
      box-shadow: 0 10px 20px rgba(143, 91, 47, 0.18);
      position: relative;
      flex: 0 0 auto;
    }

    .brand-mark::after {
      content: "";
      position: absolute;
      inset: 9px;
      border: 2px solid rgba(255, 255, 255, 0.88);
      border-radius: 7px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 8px;
      flex-wrap: wrap;
    }

    .nav-links a {
      padding: 8px 12px;
      border-radius: 999px;
      color: #4d473f;
      font-size: 14px;
      transition: background 0.2s ease, color 0.2s ease;
    }

    .nav-links a:hover {
      background: #fff2dc;
      color: var(--brand-deep);
    }

    .menu-btn {
      display: none;
      border: 1px solid var(--line);
      background: var(--paper);
      color: var(--ink);
      border-radius: 999px;
      padding: 8px 12px;
      font-size: 14px;
      cursor: pointer;
    }

    main {
      padding: 34px 0 0;
    }

    .hero {
      padding: clamp(28px, 6vw, 70px) 0 clamp(24px, 5vw, 56px);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.18fr) minmax(280px, 0.82fr);
      gap: clamp(22px, 4vw, 44px);
      align-items: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      width: fit-content;
      padding: 7px 12px;
      border: 1px solid rgba(143, 91, 47, 0.18);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.7);
      color: var(--brand-deep);
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--accent);
      box-shadow: 0 0 0 6px rgba(219, 166, 93, 0.16);
    }

    h1 {
      margin: 0;
      max-width: 780px;
      font-size: clamp(30px, 6vw, 58px);
      line-height: 1.1;
      letter-spacing: -0.04em;
      color: #201c18;
    }

    .hero-text {
      margin: 20px 0 0;
      max-width: 680px;
      color: #5d554d;
      font-size: clamp(16px, 2vw, 19px);
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 28px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 46px;
      padding: 11px 18px;
      border-radius: 999px;
      font-weight: 800;
      transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    }

    .btn-primary {
      color: #fffaf2;
      background: linear-gradient(135deg, var(--brand), var(--brand-deep));
      box-shadow: 0 14px 30px rgba(104, 65, 31, 0.18);
    }

    .btn-secondary {
      color: var(--brand-deep);
      background: rgba(255, 255, 255, 0.74);
      border: 1px solid rgba(143, 91, 47, 0.18);
    }

    .btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 16px 34px rgba(104, 65, 31, 0.14);
    }

    .diagnosis-card {
      background: rgba(255, 255, 255, 0.78);
      border: 1px solid rgba(232, 224, 212, 0.9);
      border-radius: 30px;
      padding: clamp(20px, 4vw, 30px);
      box-shadow: var(--shadow);
      position: relative;
      overflow: hidden;
      animation: floatIn 0.8s ease both;
    }

    .diagnosis-card::before {
      content: "";
      position: absolute;
      inset: auto -40px -60px auto;
      width: 160px;
      height: 160px;
      border-radius: 50%;
      background: rgba(219, 166, 93, 0.16);
    }

    .card-title {
      margin: 0 0 14px;
      font-size: 20px;
      color: #2a241f;
    }

    .signal-list {
      display: grid;
      gap: 12px;
      margin: 0;
      padding: 0;
      list-style: none;
      position: relative;
    }

    .signal-list li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      padding: 12px;
      border-radius: 16px;
      background: #fffaf2;
      border: 1px solid rgba(232, 224, 212, 0.72);
      color: #4d463f;
    }

    .dot {
      width: 9px;
      height: 9px;
      margin-top: 9px;
      border-radius: 50%;
      background: var(--accent);
      flex: 0 0 auto;
    }

    section {
      padding: clamp(26px, 5vw, 58px) 0;
    }

    .section-head {
      display: flex;
      justify-content: space-between;
      align-items: end;
      gap: 20px;
      margin-bottom: 22px;
    }

    .section-head h2 {
      margin: 0;
      font-size: clamp(24px, 4vw, 36px);
      line-height: 1.2;
      letter-spacing: -0.03em;
    }

    .section-note {
      margin: 0;
      max-width: 420px;
      color: var(--muted);
      font-size: 15px;
    }

    .answer-panel {
      display: grid;
      grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
      gap: 18px;
      align-items: stretch;
    }

    .answer-main,
    .answer-side,
    .plain-card {
      background: rgba(255, 255, 255, 0.82);
      border: 1px solid rgba(232, 224, 212, 0.9);
      border-radius: var(--radius);
      box-shadow: 0 12px 34px rgba(77, 52, 25, 0.06);
    }

    .answer-main {
      padding: clamp(20px, 4vw, 32px);
    }

    .answer-main h3,
    .plain-card h3 {
      margin: 0 0 10px;
      font-size: 21px;
    }

    .answer-main p,
    .plain-card p {
      margin: 0;
      color: #5d554d;
    }

    .answer-side {
      padding: 20px;
      display: grid;
      gap: 12px;
    }

    .mini-item {
      padding: 14px 14px 14px 16px;
      border-left: 3px solid var(--accent);
      border-radius: 14px;
      background: #fff8ec;
    }

    .mini-item strong {
      display: block;
      margin-bottom: 3px;
      color: #2b251f;
    }

    .mini-item span {
      color: #6d6258;
      font-size: 14px;
    }

    .check-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 16px;
    }

    .plain-card {
      padding: 22px;
      transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
    }

    .plain-card:hover {
      transform: translateY(-4px);
      border-color: rgba(219, 166, 93, 0.58);
      box-shadow: 0 18px 42px rgba(77, 52, 25, 0.1);
    }

    .tag {
      display: inline-flex;
      margin-bottom: 12px;
      padding: 5px 10px;
      border-radius: 999px;
      background: #f7ead8;
      color: var(--brand-deep);
      font-size: 13px;
      font-weight: 800;
    }

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

    .step {
      counter-increment: step;
      display: grid;
      grid-template-columns: auto 1fr;
      gap: 14px;
      align-items: start;
      padding: 18px;
      background: rgba(255, 255, 255, 0.84);
      border: 1px solid rgba(232, 224, 212, 0.86);
      border-radius: 20px;
    }

    .step::before {
      content: counter(step);
      width: 32px;
      height: 32px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      background: #2f2923;
      color: #fff8ec;
      font-weight: 800;
      font-size: 14px;
    }

    .step h3 {
      margin: 0 0 4px;
      font-size: 18px;
    }

    .step p {
      margin: 0;
      color: var(--muted);
    }

    .compare {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 16px;
    }

    .compare-box {
      padding: clamp(20px, 3vw, 26px);
      border-radius: 24px;
      border: 1px solid rgba(232, 224, 212, 0.92);
      background: rgba(255, 255, 255, 0.82);
      box-shadow: 0 12px 34px rgba(77, 52, 25, 0.06);
    }

    .compare-box h3 {
      margin: 0 0 12px;
      font-size: 21px;
    }

    .compare-box ul {
      margin: 0;
      padding-left: 20px;
      color: #5b534b;
    }

    .compare-box li + li {
      margin-top: 8px;
    }

    .notice {
      padding: clamp(20px, 4vw, 30px);
      border-radius: 28px;
      background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.88), rgba(255, 248, 236, 0.9)),
        radial-gradient(circle at 90% 10%, rgba(219, 166, 93, 0.2), transparent 24%);
      border: 1px solid rgba(232, 224, 212, 0.92);
      box-shadow: var(--shadow);
    }

    .notice h2 {
      margin: 0 0 10px;
      font-size: clamp(23px, 4vw, 34px);
      letter-spacing: -0.03em;
    }

    .notice p {
      margin: 0;
      color: #5a5148;
    }

    .faq-list {
      display: grid;
      gap: 12px;
    }

    details {
      background: rgba(255, 255, 255, 0.84);
      border: 1px solid rgba(232, 224, 212, 0.9);
      border-radius: 18px;
      padding: 0;
      overflow: hidden;
    }

    summary {
      cursor: pointer;
      padding: 17px 18px;
      font-weight: 800;
      color: #2a241f;
      list-style: none;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }

    summary::-webkit-details-marker {
      display: none;
    }

    summary::after {
      content: "+";
      width: 28px;
      height: 28px;
      flex: 0 0 auto;
      display: grid;
      place-items: center;
      border-radius: 50%;
      background: #fff4e3;
      color: var(--brand-deep);
      font-weight: 900;
    }

    details[open] summary::after {
      content: "−";
    }

    details p {
      margin: 0;
      padding: 0 18px 18px;
      color: var(--muted);
    }

    .related-pages {
      padding: clamp(24px, 5vw, 46px) 0;
    }

    .related-wrap {
      background: rgba(255, 255, 255, 0.78);
      border: 1px solid rgba(232, 224, 212, 0.92);
      border-radius: 26px;
      padding: clamp(18px, 4vw, 26px);
      box-shadow: 0 12px 34px rgba(77, 52, 25, 0.06);
    }

    .related-wrap h2 {
      margin: 0 0 16px;
      font-size: 24px;
    }

    .related-list {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 10px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .related-list a {
      display: block;
      height: 100%;
      padding: 12px 14px;
      border-radius: 14px;
      background: #fffaf2;
      border: 1px solid rgba(232, 224, 212, 0.84);
      color: #3b342d;
      font-size: 14px;
      transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
    }

    .related-list a:hover {
      transform: translateY(-2px);
      border-color: rgba(143, 91, 47, 0.35);
      background: #fff3df;
    }

    .site-footer {
      padding: 24px 0 30px;
      background: #f1eadf;
      border-top: 1px solid #e1d6c8;
      color: #403a33;
    }

    .footer-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
      font-size: 14px;
    }

    .footer-links {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
    }

    .footer-links a {
      color: #554a40;
    }

    .footer-links a:hover {
      color: var(--brand-deep);
    }

    .reveal {
      opacity: 0;
      transform: translateY(18px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }

    .reveal.is-visible {
      opacity: 1;
      transform: translateY(0);
    }

    @keyframes floatIn {
      from {
        opacity: 0;
        transform: translateY(16px) scale(0.98);
      }
      to {
        opacity: 1;
        transform: translateY(0) scale(1);
      }
    }

    @media (max-width: 860px) {
      .nav {
        min-height: 64px;
      }

      .menu-btn {
        display: inline-flex;
        align-items: center;
      }

      .nav-links {
        position: absolute;
        left: var(--pad);
        right: var(--pad);
        top: 68px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 12px;
        background: rgba(255, 255, 255, 0.96);
        border: 1px solid var(--line);
        border-radius: 20px;
        box-shadow: var(--shadow);
      }

      .nav-links.is-open {
        display: flex;
      }

      .nav-links a {
        padding: 11px 12px;
      }

      .hero-grid,
      .answer-panel,
      .compare {
        grid-template-columns: 1fr;
      }

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

      .section-head {
        display: block;
      }

      .section-note {
        margin-top: 8px;
      }

      .related-list {
        grid-template-columns: 1fr;
      }
    }

    @media (min-width: 861px) and (max-width: 1040px) {
      .check-grid,
      .related-list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }
    }

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

      *,
      *::before,
      *::after {
        animation: none !important;
        transition: none !important;
      }

      .reveal {
        opacity: 1;
        transform: none;
      }
    }