:root {
      --bg: #fbf7ef;
      --panel: #ffffff;
      --panel-soft: #fffaf2;
      --text: #24211d;
      --muted: #6d6256;
      --line: #eadfce;
      --accent: #b86b35;
      --accent-dark: #7f3f1f;
      --accent-soft: #f6dfc8;
      --green: #57745a;
      --shadow: 0 18px 45px rgba(88, 59, 28, 0.1);
      --radius-lg: 26px;
      --radius-md: 18px;
      --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", sans-serif;
      color: var(--text);
      background:
        radial-gradient(circle at 8% 8%, rgba(184, 107, 53, 0.13), transparent 30%),
        radial-gradient(circle at 90% 18%, rgba(87, 116, 90, 0.12), transparent 28%),
        linear-gradient(180deg, #fbf7ef 0%, #fffdf8 48%, #fbf7ef 100%);
      line-height: 1.7;
    }

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

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

    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(251, 247, 239, 0.88);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(234, 223, 206, 0.85);
    }

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

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

    .brand-mark {
      width: 34px;
      height: 34px;
      display: grid;
      place-items: center;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--accent), #d79a62);
      color: #fff;
      font-size: 18px;
      box-shadow: 0 8px 20px rgba(184, 107, 53, 0.24);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .nav-links a {
      padding: 9px 13px;
      border-radius: 999px;
      color: #50473f;
      font-size: 14px;
      transition: background 0.2s ease, color 0.2s ease;
    }

    .nav-links a:hover {
      background: var(--accent-soft);
      color: var(--accent-dark);
    }

    .menu-toggle {
      display: none;
      border: 1px solid var(--line);
      background: #fffaf4;
      color: var(--text);
      border-radius: 12px;
      padding: 8px 11px;
      font-size: 15px;
      cursor: pointer;
    }

    main {
      overflow: hidden;
    }

    .hero {
      padding: 72px 0 42px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.08fr) minmax(280px, 0.92fr);
      gap: 34px;
      align-items: start;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border: 1px solid rgba(184, 107, 53, 0.22);
      border-radius: 999px;
      background: rgba(255, 250, 242, 0.78);
      color: var(--accent-dark);
      font-weight: 700;
      font-size: 13px;
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--green);
      box-shadow: 0 0 0 5px rgba(87, 116, 90, 0.14);
    }

    h1 {
      margin: 22px 0 16px;
      font-size: clamp(34px, 7vw, 64px);
      line-height: 1.08;
      letter-spacing: -0.055em;
      color: #221c16;
    }

    .hero-lead {
      margin: 0;
      max-width: 690px;
      color: #5e554c;
      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;
      gap: 8px;
      min-height: 46px;
      padding: 0 18px;
      border-radius: 999px;
      border: 1px solid transparent;
      font-weight: 750;
      transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
    }

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

    .btn-primary {
      background: var(--accent-dark);
      color: #fff;
      box-shadow: 0 14px 26px rgba(127, 63, 31, 0.2);
    }

    .btn-secondary {
      background: #fffdf8;
      color: var(--accent-dark);
      border-color: rgba(184, 107, 53, 0.3);
    }

    .hero-card {
      position: relative;
      padding: 24px;
      border-radius: var(--radius-lg);
      background: rgba(255, 253, 248, 0.86);
      border: 1px solid rgba(234, 223, 206, 0.95);
      box-shadow: var(--shadow);
    }

    .hero-card::after {
      content: "";
      position: absolute;
      inset: auto 24px -10px 24px;
      height: 20px;
      border-radius: 999px;
      background: rgba(184, 107, 53, 0.12);
      filter: blur(14px);
      z-index: -1;
    }

    .card-title {
      margin: 0 0 12px;
      font-size: 20px;
      line-height: 1.35;
      color: #2b231c;
    }

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

    .quick-list li {
      display: grid;
      grid-template-columns: 28px 1fr;
      gap: 10px;
      align-items: start;
      padding: 12px;
      border-radius: 16px;
      background: var(--panel-soft);
      border: 1px solid rgba(234, 223, 206, 0.78);
      color: #4f463e;
      font-size: 15px;
    }

    .num {
      width: 28px;
      height: 28px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      background: var(--accent-soft);
      color: var(--accent-dark);
      font-weight: 800;
      font-size: 13px;
    }

    section {
      padding: 42px 0;
    }

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

    .section-kicker {
      margin: 0 0 8px;
      color: var(--accent-dark);
      font-size: 13px;
      font-weight: 800;
      letter-spacing: 0.08em;
    }

    h2 {
      margin: 0;
      font-size: clamp(26px, 4vw, 38px);
      line-height: 1.18;
      letter-spacing: -0.035em;
      color: #241f1a;
    }

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

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

    .issue-card {
      padding: 22px;
      border-radius: var(--radius-md);
      background: rgba(255, 253, 248, 0.9);
      border: 1px solid var(--line);
      box-shadow: 0 12px 28px rgba(88, 59, 28, 0.06);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .issue-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 18px 34px rgba(88, 59, 28, 0.1);
    }

    .issue-card h3 {
      margin: 0 0 8px;
      font-size: 18px;
      color: #2d251f;
    }

    .issue-card p {
      margin: 0;
      color: #685d52;
      font-size: 15px;
    }

    .steps {
      display: grid;
      gap: 14px;
      counter-reset: step;
    }

    .step {
      display: grid;
      grid-template-columns: 58px 1fr;
      gap: 16px;
      align-items: start;
      padding: 18px;
      border-radius: 22px;
      background: linear-gradient(135deg, rgba(255, 253, 248, 0.95), rgba(255, 250, 242, 0.9));
      border: 1px solid var(--line);
    }

    .step::before {
      counter-increment: step;
      content: counter(step);
      width: 46px;
      height: 46px;
      display: grid;
      place-items: center;
      border-radius: 16px;
      background: #2f3a2f;
      color: #fff;
      font-weight: 800;
      box-shadow: 0 10px 20px rgba(47, 58, 47, 0.16);
    }

    .step h3 {
      margin: 0 0 6px;
      font-size: 18px;
    }

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

    .split {
      display: grid;
      grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
      gap: 20px;
      align-items: start;
    }

    .note-box,
    .channel-box {
      padding: 24px;
      border-radius: var(--radius-lg);
      background: rgba(255, 253, 248, 0.92);
      border: 1px solid var(--line);
      box-shadow: 0 14px 32px rgba(88, 59, 28, 0.07);
    }

    .note-box h3,
    .channel-box h3 {
      margin: 0 0 12px;
      font-size: 20px;
    }

    .plain-list {
      margin: 0;
      padding-left: 20px;
      color: #5f554c;
    }

    .plain-list li + li {
      margin-top: 8px;
    }

    .channel-list {
      display: grid;
      gap: 10px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .channel-list li {
      padding: 13px 14px;
      border-radius: 16px;
      background: #fff8ed;
      border: 1px solid rgba(234, 223, 206, 0.82);
      color: #594f45;
    }

    .channel-list strong {
      color: #2b231d;
    }

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

    details {
      border: 1px solid var(--line);
      border-radius: 18px;
      background: rgba(255, 253, 248, 0.93);
      overflow: hidden;
      box-shadow: 0 10px 24px rgba(88, 59, 28, 0.05);
    }

    summary {
      cursor: pointer;
      padding: 17px 20px;
      font-weight: 800;
      color: #2a241e;
      list-style: none;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
    }

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

    summary::after {
      content: "+";
      flex: 0 0 auto;
      width: 28px;
      height: 28px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      background: var(--accent-soft);
      color: var(--accent-dark);
      font-weight: 900;
      transition: transform 0.2s ease;
    }

    details[open] summary::after {
      transform: rotate(45deg);
    }

    details p {
      margin: 0;
      padding: 0 20px 18px;
      color: var(--muted);
    }

    .final-card {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 18px;
      align-items: center;
      padding: 26px;
      border-radius: 30px;
      background:
        linear-gradient(135deg, rgba(184, 107, 53, 0.14), rgba(87, 116, 90, 0.12)),
        #fffdf8;
      border: 1px solid rgba(234, 223, 206, 0.95);
      box-shadow: var(--shadow);
    }

    .final-card h2 {
      font-size: clamp(24px, 4vw, 34px);
    }

    .final-card p {
      margin: 10px 0 0;
      color: #64584e;
    }

    .site-footer {
      margin-top: 18px;
      padding: 26px 0;
      background: #f3eadc;
      color: #342c25;
      border-top: 1px solid #e2d4c2;
    }

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

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

    .footer-links a {
      color: #4d4036;
    }

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

    .back-top {
      position: fixed;
      right: 18px;
      bottom: 18px;
      width: 44px;
      height: 44px;
      border: 1px solid rgba(184, 107, 53, 0.25);
      border-radius: 50%;
      background: #fffdf8;
      color: var(--accent-dark);
      box-shadow: 0 12px 28px rgba(88, 59, 28, 0.12);
      cursor: pointer;
      opacity: 0;
      transform: translateY(12px);
      pointer-events: none;
      transition: opacity 0.2s ease, transform 0.2s ease;
      font-weight: 900;
    }

    .back-top.show {
      opacity: 1;
      transform: translateY(0);
      pointer-events: auto;
    }

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

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

    @media (max-width: 860px) {
      .nav {
        min-height: 66px;
      }

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

      .nav-links {
        position: absolute;
        left: 16px;
        right: 16px;
        top: 70px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 12px;
        border-radius: 18px;
        background: #fffdf8;
        border: 1px solid var(--line);
        box-shadow: var(--shadow);
      }

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

      .nav-links a {
        padding: 12px 14px;
      }

      .hero {
        padding-top: 48px;
      }

      .hero-grid,
      .split,
      .final-card {
        grid-template-columns: 1fr;
      }

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

      .final-card .btn {
        width: 100%;
      }

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

    @media (max-width: 520px) {
      .container {
        width: min(100% - 24px, var(--container));
      }

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

      .btn {
        width: 100%;
      }

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

      .step::before {
        width: 42px;
        height: 42px;
      }

      .hero-card,
      .note-box,
      .channel-box,
      .final-card {
        padding: 20px;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      *,
      *::before,
      *::after {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important;
      }

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