:root {
      --bg: #f7f3ea;
      --bg-soft: #fffaf1;
      --card: #ffffff;
      --text: #23211f;
      --muted: #67615a;
      --line: #e7dccd;
      --brand: #8b5e34;
      --brand-strong: #6f4825;
      --accent: #d9904a;
      --green: #3e7b61;
      --shadow: 0 18px 50px rgba(96, 70, 42, 0.12);
      --radius: 24px;
      --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(--text);
      background:
        radial-gradient(circle at 12% 4%, rgba(217, 144, 74, 0.18), transparent 28%),
        radial-gradient(circle at 92% 16%, rgba(62, 123, 97, 0.12), transparent 30%),
        linear-gradient(180deg, #fbf6ed 0%, var(--bg) 44%, #fffaf3 100%);
      line-height: 1.75;
      overflow-x: hidden;
    }

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

    .container {
      width: min(100% - var(--pad) * 2, var(--container));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(255, 250, 243, 0.86);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(231, 220, 205, 0.72);
    }

    .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;
      color: var(--brand-strong);
      white-space: nowrap;
    }

    .brand-mark {
      width: 34px;
      height: 34px;
      border-radius: 12px;
      background: linear-gradient(135deg, #8b5e34, #d9904a);
      box-shadow: 0 8px 24px rgba(139, 94, 52, 0.24);
      position: relative;
      flex: 0 0 auto;
    }

    .brand-mark::after {
      content: "";
      position: absolute;
      width: 12px;
      height: 12px;
      border: 2px solid rgba(255, 255, 255, 0.86);
      border-radius: 5px;
      left: 9px;
      top: 9px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 22px;
      font-size: 14px;
      color: #4f4942;
    }

    .nav-links a {
      padding: 8px 2px;
      position: relative;
    }

    .nav-links a::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: 4px;
      height: 2px;
      background: var(--accent);
      transform: scaleX(0);
      transform-origin: right;
      transition: transform 0.25s ease;
    }

    .nav-links a:hover::after {
      transform: scaleX(1);
      transform-origin: left;
    }

    .menu-btn {
      display: none;
      border: 1px solid var(--line);
      background: #fffaf3;
      color: var(--text);
      border-radius: 14px;
      padding: 9px 12px;
      font-size: 14px;
    }

    main {
      display: block;
    }

    .hero {
      padding: clamp(46px, 8vw, 86px) 0 36px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.22fr) minmax(280px, 0.78fr);
      gap: clamp(24px, 5vw, 54px);
      align-items: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 12px;
      border: 1px solid rgba(139, 94, 52, 0.18);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.72);
      color: var(--brand-strong);
      font-weight: 700;
      font-size: 13px;
      margin: 0 0 18px;
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--green);
      box-shadow: 0 0 0 5px rgba(62, 123, 97, 0.13);
    }

    h1 {
      margin: 0;
      font-size: clamp(32px, 7vw, 62px);
      line-height: 1.08;
      letter-spacing: -0.055em;
      color: #211d19;
    }

    .hero-lead {
      margin: 22px 0 0;
      max-width: 720px;
      color: var(--muted);
      font-size: clamp(16px, 2.2vw, 19px);
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 30px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border-radius: 999px;
      padding: 12px 18px;
      font-weight: 800;
      font-size: 15px;
      transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
      border: 1px solid transparent;
    }

    .btn-primary {
      background: #2e2721;
      color: #ffffff;
      box-shadow: 0 14px 28px rgba(46, 39, 33, 0.16);
    }

    .btn-secondary {
      background: rgba(255, 255, 255, 0.7);
      color: var(--brand-strong);
      border-color: rgba(139, 94, 52, 0.22);
    }

    .btn:hover {
      transform: translateY(-2px);
    }

    .diagnosis-card {
      background: rgba(255, 255, 255, 0.78);
      border: 1px solid rgba(231, 220, 205, 0.9);
      border-radius: 30px;
      padding: 22px;
      box-shadow: var(--shadow);
      position: relative;
      overflow: hidden;
    }

    .diagnosis-card::before {
      content: "";
      position: absolute;
      inset: -80px -70px auto auto;
      width: 180px;
      height: 180px;
      border-radius: 50%;
      background: rgba(217, 144, 74, 0.16);
    }

    .mini-screen {
      position: relative;
      border-radius: 24px;
      border: 10px solid #2d2925;
      background:
        linear-gradient(110deg, rgba(255, 255, 255, 0.28), transparent 34%),
        repeating-linear-gradient(90deg, rgba(217, 144, 74, 0.4) 0 8px, rgba(62, 123, 97, 0.25) 8px 16px, rgba(139, 94, 52, 0.16) 16px 24px),
        #f3e3cf;
      min-height: 235px;
      box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.26);
      animation: softGlow 4.8s ease-in-out infinite;
    }

    .mini-screen::after {
      content: "";
      position: absolute;
      left: 18%;
      top: 18%;
      width: 60%;
      height: 52%;
      border-radius: 18px;
      background: rgba(255, 250, 243, 0.62);
      border: 1px solid rgba(255, 255, 255, 0.7);
    }

    .card-notes {
      display: grid;
      gap: 10px;
      margin-top: 16px;
    }

    .note {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      padding: 11px 12px;
      border-radius: 16px;
      background: rgba(255, 250, 243, 0.82);
      color: #4d463e;
      font-size: 14px;
    }

    .note strong {
      color: var(--brand-strong);
      white-space: nowrap;
    }

    section {
      padding: clamp(34px, 6vw, 64px) 0;
    }

    .section-head {
      display: grid;
      gap: 10px;
      margin-bottom: 24px;
      max-width: 780px;
    }

    h2 {
      margin: 0;
      font-size: clamp(24px, 4vw, 38px);
      line-height: 1.18;
      letter-spacing: -0.035em;
      color: #25211d;
    }

    h3 {
      margin: 0 0 8px;
      font-size: 18px;
      line-height: 1.35;
      color: #2e2924;
    }

    .section-head p,
    .text-block p,
    .card p,
    .faq-answer {
      margin: 0;
      color: var(--muted);
    }

    .split-panel {
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
      gap: 16px;
      align-items: stretch;
    }

    .panel {
      background: rgba(255, 255, 255, 0.8);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: clamp(18px, 3vw, 26px);
      box-shadow: 0 12px 36px rgba(96, 70, 42, 0.08);
    }

    .panel-title {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 14px;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-width: 34px;
      height: 34px;
      border-radius: 12px;
      background: #f4e1ca;
      color: var(--brand-strong);
      font-weight: 900;
    }

    .check-list {
      display: grid;
      gap: 12px;
      margin: 0;
      padding: 0;
      list-style: none;
      color: #4f4942;
    }

    .check-list li {
      display: grid;
      grid-template-columns: 20px minmax(0, 1fr);
      gap: 10px;
      align-items: start;
    }

    .check-list li::before {
      content: "";
      width: 9px;
      height: 9px;
      margin-top: 10px;
      border-radius: 50%;
      background: var(--green);
      box-shadow: 0 0 0 5px rgba(62, 123, 97, 0.1);
    }

    .steps {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 14px;
    }

    .step {
      background: rgba(255, 255, 255, 0.78);
      border: 1px solid var(--line);
      border-radius: 22px;
      padding: 18px;
      transition: transform 0.22s ease, box-shadow 0.22s ease;
    }

    .step:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 34px rgba(96, 70, 42, 0.1);
    }

    .step-num {
      display: inline-flex;
      width: 38px;
      height: 38px;
      align-items: center;
      justify-content: center;
      border-radius: 14px;
      background: #2e2721;
      color: #ffffff;
      font-weight: 900;
      margin-bottom: 12px;
    }

    .compare {
      overflow: hidden;
      border-radius: var(--radius);
      border: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.8);
      box-shadow: 0 12px 36px rgba(96, 70, 42, 0.08);
    }

    .compare-row {
      display: grid;
      grid-template-columns: 0.9fr 1.15fr 1.15fr;
      border-bottom: 1px solid var(--line);
    }

    .compare-row:last-child {
      border-bottom: 0;
    }

    .compare-cell {
      padding: 16px;
      color: #4f4942;
      min-width: 0;
    }

    .compare-head {
      background: #f3e7d8;
      font-weight: 900;
      color: #2e2924;
    }

    .compare-cell:not(:last-child) {
      border-right: 1px solid var(--line);
    }

    .tips-grid {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 16px;
      align-items: start;
    }

    .soft-box {
      background: linear-gradient(135deg, rgba(255, 255, 255, 0.88), rgba(255, 247, 236, 0.9));
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: clamp(18px, 3vw, 26px);
    }

    .warning {
      border-left: 4px solid var(--accent);
    }

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

    .faq-item {
      border: 1px solid var(--line);
      border-radius: 20px;
      background: rgba(255, 255, 255, 0.8);
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      border: 0;
      background: transparent;
      color: #2e2924;
      text-align: left;
      padding: 18px 20px;
      font-size: 16px;
      font-weight: 800;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
    }

    .faq-question span {
      flex: 1;
    }

    .faq-question::after {
      content: "+";
      width: 26px;
      height: 26px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 50%;
      background: #f3e7d8;
      color: var(--brand-strong);
      flex: 0 0 auto;
      transition: transform 0.2s ease;
    }

    .faq-item.open .faq-question::after {
      transform: rotate(45deg);
    }

    .faq-answer {
      display: none;
      padding: 0 20px 18px;
    }

    .faq-item.open .faq-answer {
      display: block;
    }

    .related-pages {
      padding: clamp(32px, 5vw, 54px) 0 34px;
    }

    .related-box {
      background: rgba(255, 255, 255, 0.78);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: clamp(18px, 3vw, 26px);
      box-shadow: 0 12px 36px rgba(96, 70, 42, 0.08);
    }

    .related-box h2 {
      font-size: clamp(22px, 3vw, 30px);
      margin-bottom: 16px;
    }

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

    .related-list a {
      display: block;
      padding: 13px 14px;
      border-radius: 16px;
      background: #fffaf3;
      border: 1px solid rgba(231, 220, 205, 0.8);
      color: #3f3933;
      font-weight: 700;
      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(139, 94, 52, 0.35);
      background: #fff4e4;
    }

    .site-footer {
      background: #2e2721;
      color: #f7efe4;
      padding: 24px 0;
    }

    .footer-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      font-size: 13px;
    }

    .footer-inner a {
      color: #f7dcb8;
    }

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

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

    @keyframes softGlow {
      0%, 100% {
        filter: saturate(0.98) brightness(1);
      }
      50% {
        filter: saturate(1.08) brightness(1.04);
      }
    }

    @media (max-width: 900px) {
      .hero-grid,
      .split-panel,
      .tips-grid {
        grid-template-columns: 1fr;
      }

      .steps {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .related-list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .diagnosis-card {
        max-width: 620px;
      }
    }

    @media (max-width: 720px) {
      .nav {
        min-height: 64px;
      }

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

      .nav-links {
        position: absolute;
        left: var(--pad);
        right: var(--pad);
        top: 64px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        padding: 12px;
        border: 1px solid var(--line);
        border-radius: 18px;
        background: #fffaf3;
        box-shadow: var(--shadow);
      }

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

      .nav-links a {
        padding: 10px 12px;
        border-radius: 12px;
      }

      .nav-links a:hover {
        background: #f4e8d8;
      }

      .nav-links a::after {
        display: none;
      }

      .hero {
        padding-top: 36px;
      }

      .hero-actions {
        flex-direction: column;
      }

      .btn {
        width: 100%;
      }

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

      .compare {
        border-radius: 20px;
      }

      .compare-row {
        grid-template-columns: 1fr;
      }

      .compare-cell:not(:last-child) {
        border-right: 0;
        border-bottom: 1px solid var(--line);
      }

      .compare-row.compare-head {
        display: none;
      }

      .compare-cell[data-label]::before {
        content: attr(data-label);
        display: block;
        font-weight: 900;
        color: var(--brand-strong);
        margin-bottom: 5px;
      }

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

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

      *,
      *::before,
      *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
      }
    }