:root {
      --bg: #fbfaf6;
      --panel: #ffffff;
      --ink: #1f2933;
      --muted: #65727f;
      --line: #e6dfd3;
      --accent: #2f7a67;
      --accent-strong: #1f5f50;
      --warm: #f3e7d4;
      --soft: #eef6f2;
      --shadow: 0 18px 50px rgba(62, 74, 86, 0.08);
      --radius: 22px;
      --container: 1120px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
      color: var(--ink);
      background:
        radial-gradient(circle at 12% 8%, rgba(243, 231, 212, 0.95), transparent 28%),
        radial-gradient(circle at 86% 10%, rgba(222, 242, 234, 0.9), transparent 30%),
        linear-gradient(180deg, #fbfaf6 0%, #f7f3ea 58%, #fbfaf6 100%);
      line-height: 1.75;
      overflow-x: hidden;
    }

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

    button {
      font: inherit;
    }

    .container {
      width: min(100% - 32px, var(--container));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(251, 250, 246, 0.86);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(230, 223, 211, 0.76);
    }

    .nav {
      min-height: 68px;
      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: #20332d;
      white-space: nowrap;
    }

    .brand-mark {
      width: 34px;
      height: 34px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--accent), #9bc7aa);
      box-shadow: 0 10px 24px rgba(47, 122, 103, 0.22);
      position: relative;
      flex: 0 0 auto;
    }

    .brand-mark::after {
      content: "";
      position: absolute;
      width: 12px;
      height: 18px;
      border: 2px solid #ffffff;
      border-radius: 5px;
      left: 10px;
      top: 7px;
    }

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

    .nav-links a {
      padding: 10px 12px;
      border-radius: 999px;
      color: #3d4b55;
      font-size: 14px;
      transition: background 0.2s ease, color 0.2s ease;
    }

    .nav-links a:hover {
      background: rgba(47, 122, 103, 0.09);
      color: var(--accent-strong);
    }

    .menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border: 1px solid var(--line);
      background: #fffdf8;
      border-radius: 14px;
      color: var(--ink);
      align-items: center;
      justify-content: center;
      cursor: pointer;
    }

    .menu-toggle span {
      width: 18px;
      height: 2px;
      border-radius: 2px;
      background: currentColor;
      position: relative;
      display: block;
    }

    .menu-toggle span::before,
    .menu-toggle span::after {
      content: "";
      position: absolute;
      left: 0;
      width: 18px;
      height: 2px;
      border-radius: 2px;
      background: currentColor;
      transition: transform 0.2s ease, top 0.2s ease;
    }

    .menu-toggle span::before {
      top: -6px;
    }

    .menu-toggle span::after {
      top: 6px;
    }

    .menu-toggle[aria-expanded="true"] span {
      background: transparent;
    }

    .menu-toggle[aria-expanded="true"] span::before {
      top: 0;
      transform: rotate(45deg);
      background: var(--ink);
    }

    .menu-toggle[aria-expanded="true"] span::after {
      top: 0;
      transform: rotate(-45deg);
      background: var(--ink);
    }

    main {
      display: block;
    }

    .hero {
      padding: 64px 0 36px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.12fr) minmax(280px, 0.88fr);
      gap: 34px;
      align-items: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      margin: 0 0 18px;
      padding: 7px 12px;
      border: 1px solid rgba(47, 122, 103, 0.18);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.62);
      color: var(--accent-strong);
      font-size: 14px;
      font-weight: 700;
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--accent);
      box-shadow: 0 0 0 5px rgba(47, 122, 103, 0.12);
    }

    h1 {
      margin: 0;
      font-size: clamp(34px, 7vw, 64px);
      line-height: 1.08;
      letter-spacing: -0.055em;
      color: #18231f;
    }

    .lead {
      margin: 22px 0 0;
      max-width: 720px;
      font-size: clamp(17px, 2.2vw, 20px);
      color: #4c5a62;
    }

    .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: 12px 18px;
      border-radius: 999px;
      font-weight: 800;
      border: 1px solid transparent;
      transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
    }

    .btn-primary {
      background: var(--accent);
      color: #ffffff;
      box-shadow: 0 14px 28px rgba(47, 122, 103, 0.2);
    }

    .btn-primary:hover {
      background: var(--accent-strong);
      transform: translateY(-2px);
      box-shadow: 0 18px 34px rgba(31, 95, 80, 0.22);
    }

    .btn-secondary {
      background: rgba(255, 255, 255, 0.76);
      color: #243730;
      border-color: var(--line);
    }

    .btn-secondary:hover {
      transform: translateY(-2px);
      background: #ffffff;
    }

    .summary-card {
      background: rgba(255, 255, 255, 0.82);
      border: 1px solid rgba(230, 223, 211, 0.9);
      border-radius: 30px;
      padding: 26px;
      box-shadow: var(--shadow);
      position: relative;
      overflow: hidden;
    }

    .summary-card::before {
      content: "";
      position: absolute;
      inset: 0;
      background:
        linear-gradient(135deg, rgba(47, 122, 103, 0.12), transparent 38%),
        radial-gradient(circle at 86% 18%, rgba(243, 231, 212, 0.9), transparent 26%);
      pointer-events: none;
    }

    .summary-card > * {
      position: relative;
    }

    .summary-title {
      margin: 0 0 14px;
      font-size: 20px;
      letter-spacing: -0.02em;
    }

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

    .decision-list li {
      display: grid;
      grid-template-columns: 26px 1fr;
      gap: 10px;
      align-items: start;
      color: #3f4e56;
    }

    .tick {
      width: 26px;
      height: 26px;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--soft);
      color: var(--accent-strong);
      font-weight: 900;
      line-height: 1;
      margin-top: 2px;
    }

    .section {
      padding: 42px 0;
    }

    .section-head {
      margin-bottom: 22px;
      max-width: 760px;
    }

    .section-kicker {
      margin: 0 0 8px;
      color: var(--accent-strong);
      font-weight: 800;
      font-size: 14px;
      letter-spacing: 0.04em;
    }

    h2 {
      margin: 0;
      color: #1d2a25;
      font-size: clamp(25px, 4vw, 38px);
      line-height: 1.2;
      letter-spacing: -0.035em;
    }

    .section-desc {
      margin: 12px 0 0;
      color: var(--muted);
      font-size: 16px;
    }

    .answer-panel {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
      align-items: stretch;
    }

    .plain-card {
      background: rgba(255, 255, 255, 0.78);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: 22px;
      box-shadow: 0 10px 32px rgba(45, 56, 66, 0.05);
      transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
    }

    .plain-card:hover {
      transform: translateY(-4px);
      border-color: rgba(47, 122, 103, 0.28);
      box-shadow: 0 18px 42px rgba(45, 56, 66, 0.09);
    }

    .plain-card h3 {
      margin: 0 0 10px;
      font-size: 20px;
      color: #1e2c27;
      letter-spacing: -0.02em;
    }

    .plain-card p {
      margin: 0;
      color: #55636c;
    }

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

    .mini-label {
      display: inline-flex;
      margin-bottom: 12px;
      padding: 6px 10px;
      border-radius: 999px;
      background: var(--warm);
      color: #674d29;
      font-size: 13px;
      font-weight: 800;
    }

    .steps {
      counter-reset: step;
      display: grid;
      gap: 14px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .steps li {
      counter-increment: step;
      display: grid;
      grid-template-columns: 42px 1fr;
      gap: 14px;
      align-items: start;
      padding: 18px;
      border: 1px solid var(--line);
      border-radius: 20px;
      background: rgba(255, 255, 255, 0.72);
    }

    .steps li::before {
      content: counter(step);
      width: 42px;
      height: 42px;
      border-radius: 16px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: #20332d;
      color: #ffffff;
      font-weight: 900;
      box-shadow: 0 12px 24px rgba(32, 51, 45, 0.12);
    }

    .steps strong {
      display: block;
      margin-bottom: 4px;
      color: #1e2b26;
    }

    .steps span {
      color: #5c6972;
    }

    .note-band {
      display: grid;
      grid-template-columns: 0.8fr 1.2fr;
      gap: 22px;
      align-items: start;
      padding: 28px;
      border-radius: 28px;
      background: linear-gradient(135deg, #20332d, #315c4e);
      color: #ffffff;
      box-shadow: 0 22px 56px rgba(32, 51, 45, 0.18);
    }

    .note-band h2 {
      color: #ffffff;
    }

    .note-band p,
    .note-band li {
      color: rgba(255, 255, 255, 0.86);
    }

    .note-band ul {
      margin: 0;
      padding-left: 20px;
    }

    .note-band li + li {
      margin-top: 8px;
    }

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

    .faq-item {
      border: 1px solid var(--line);
      border-radius: 20px;
      background: rgba(255, 255, 255, 0.78);
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      border: 0;
      background: transparent;
      color: #1f2d28;
      min-height: 58px;
      padding: 16px 18px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      text-align: left;
      cursor: pointer;
      font-weight: 850;
    }

    .faq-question::after {
      content: "+";
      width: 28px;
      height: 28px;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--soft);
      color: var(--accent-strong);
      flex: 0 0 auto;
      font-size: 20px;
      line-height: 1;
      transition: transform 0.2s ease;
    }

    .faq-question[aria-expanded="true"]::after {
      transform: rotate(45deg);
    }

    .faq-answer {
      display: grid;
      grid-template-rows: 0fr;
      transition: grid-template-rows 0.24s ease;
    }

    .faq-answer.is-open {
      grid-template-rows: 1fr;
    }

    .faq-answer > div {
      overflow: hidden;
    }

    .faq-answer p {
      margin: 0;
      padding: 0 18px 18px;
      color: #5b6871;
    }

    .cta {
      padding: 36px 0 52px;
    }

    .cta-box {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 18px;
      align-items: center;
      padding: 28px;
      border-radius: 30px;
      background:
        radial-gradient(circle at 92% 20%, rgba(243, 231, 212, 0.95), transparent 34%),
        rgba(255, 255, 255, 0.82);
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
    }

    .cta-box h2 {
      font-size: clamp(24px, 3.2vw, 34px);
    }

    .cta-box p {
      margin: 10px 0 0;
      color: var(--muted);
    }

    .site-footer {
      border-top: 1px solid var(--line);
      background: #f6f1e8;
      color: #26342f;
    }

    .footer-inner {
      min-height: 92px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      padding: 22px 0;
    }

    .footer-inner p {
      margin: 0;
      color: #5b655f;
      font-size: 14px;
    }

    .footer-links {
      display: flex;
      flex-wrap: wrap;
      gap: 8px 14px;
      align-items: center;
    }

    .footer-links a {
      color: #26342f;
      font-size: 14px;
    }

    .footer-links a:hover {
      color: var(--accent-strong);
    }

    .reveal {
      opacity: 0;
      transform: translateY(18px);
      transition: opacity 0.5s ease, transform 0.5s ease;
    }

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

    @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;
      }

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

    @media (max-width: 900px) {
      .hero {
        padding-top: 44px;
      }

      .hero-grid,
      .answer-panel,
      .note-band,
      .cta-box {
        grid-template-columns: 1fr;
      }

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

      .cta-box {
        align-items: start;
      }
    }

    @media (max-width: 720px) {
      .container {
        width: min(100% - 24px, var(--container));
      }

      .nav {
        min-height: 64px;
      }

      .menu-toggle {
        display: inline-flex;
      }

      .nav-links {
        position: absolute;
        left: 12px;
        right: 12px;
        top: 70px;
        display: grid;
        gap: 6px;
        padding: 10px;
        border: 1px solid var(--line);
        border-radius: 20px;
        background: rgba(255, 253, 248, 0.97);
        box-shadow: var(--shadow);
        transform-origin: top;
        transform: scaleY(0.96);
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s ease;
      }

      .nav-links.is-open {
        transform: scaleY(1);
        opacity: 1;
        visibility: visible;
      }

      .nav-links a {
        min-height: 44px;
        display: flex;
        align-items: center;
        border-radius: 14px;
      }

      .hero {
        padding: 34px 0 24px;
      }

      .summary-card,
      .plain-card,
      .cta-box,
      .note-band {
        border-radius: 22px;
        padding: 20px;
      }

      .section {
        padding: 32px 0;
      }

      .hero-actions,
      .footer-inner {
        flex-direction: column;
        align-items: stretch;
      }

      .btn {
        width: 100%;
      }

      .steps li {
        grid-template-columns: 36px 1fr;
        padding: 16px;
      }

      .steps li::before {
        width: 36px;
        height: 36px;
        border-radius: 14px;
      }

      .footer-links {
        justify-content: flex-start;
      }
    }