:root {
      --green-deep: #1B4332;
      --green-ink: #2D6A4F;
      --green-mid: #40916C;
      --green-soft: #74C69D;
      --green-wash: #D8F3DC;
      --paper: #F7F4EC;
      --paper-warm: #F0EAD8;
      --ink: #1C1C1C;
      --ink-soft: #4A4A4A;
      --ink-faint: #7A7A7A;
      --line: #D9D2C0;
      --radius-sm: 6px;
      --radius: 14px;
      --radius-lg: 24px;
      --serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", Georgia, serif;
      --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
    }

    * { margin: 0; padding: 0; box-sizing: border-box; }
    html { scroll-behavior: smooth; }

    body {
      font-family: var(--sans);
      background: var(--paper);
      color: var(--ink);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      background-image:
        linear-gradient(rgba(247,244,236,0.92), rgba(247,244,236,0.92)),
        repeating-linear-gradient(0deg, transparent, transparent 31px, rgba(217,210,192,0.35) 31px, rgba(217,210,192,0.35) 32px);
    }

    .nav {
      position: sticky; top: 0; z-index: 100;
      background: rgba(247,244,236,0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--line);
    }
    .nav-inner {
      max-width: 1120px; margin: 0 auto;
      display: flex; align-items: center; justify-content: space-between;
      padding: 12px 24px;
    }
    .logo {
      display: flex; align-items: center; gap: 10px;
      font-family: var(--serif);
      font-size: 1.3rem;
      font-weight: 700;
      color: var(--green-deep);
      letter-spacing: 0.04em;
      text-decoration: none;
    }
    .logo-img { width: 36px; height: 36px; border-radius: 50%; display: block; flex-shrink: 0; }
    .nav-links { display: flex; gap: 24px; flex-wrap: wrap; }
    .nav-links a { color: var(--ink-soft); text-decoration: none; font-size: 0.9rem; transition: color .2s; }
    .nav-links a:hover { color: var(--green-ink); }
    .nav-cta {
      background: var(--green-ink);
      color: var(--paper) !important;
      padding: 8px 20px;
      border-radius: 999px;
      font-size: 0.88rem;
      font-weight: 600;
      text-decoration: none;
    }

    .hero {
      max-width: 1120px; margin: 0 auto;
      padding: 56px 24px 40px;
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-eyebrow {
      font-size: 0.8rem;
      color: var(--green-ink);
      letter-spacing: 0.1em;
      margin-bottom: 16px;
    }
    .hero h1 {
      font-family: var(--serif);
      font-size: clamp(2.1rem, 4.2vw, 3.2rem);
      font-weight: 700;
      line-height: 1.3;
      color: var(--green-deep);
      margin-bottom: 18px;
    }
    .hero h1 em { font-style: normal; color: var(--green-ink); }
    .hero-sub {
      font-size: 1.02rem;
      color: var(--ink-soft);
      max-width: 560px;
      margin-bottom: 28px;
      line-height: 1.85;
    }
    .hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
    .btn-primary {
      display: inline-block;
      background: var(--green-ink);
      color: var(--paper);
      padding: 12px 30px;
      border-radius: 999px;
      text-decoration: none;
      font-weight: 600;
      font-size: 0.93rem;
    }
    .btn-primary:hover { background: var(--green-deep); }
    .btn-ghost {
      display: inline-block;
      color: var(--green-ink);
      padding: 12px 26px;
      border: 1px solid var(--green-soft);
      border-radius: 999px;
      text-decoration: none;
      font-weight: 500;
      font-size: 0.93rem;
    }
    .btn-ghost:hover { background: var(--green-wash); }

    .hero-card {
      background: var(--paper-warm);
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      padding: 28px 26px;
      box-shadow: 0 24px 60px -28px rgba(27,67,50,0.25);
    }
    .hero-card p {
      font-family: var(--serif);
      font-size: 1.02rem;
      color: var(--ink-soft);
      line-height: 1.9;
      padding-left: 16px;
      border-left: 2px solid var(--green-soft);
    }
    .hero-card .card-tag {
      display: inline-block;
      margin-top: 14px;
      font-size: 0.74rem;
      color: var(--green-ink);
      background: var(--green-wash);
      padding: 4px 12px;
      border-radius: 999px;
    }

    .section { max-width: 1120px; margin: 0 auto; padding: 20px 20px; }
    .section-head { margin-bottom: 20px; }

    .section h2 {
      font-family: var(--serif);
      font-size: clamp(1.6rem, 2.8vw, 2.1rem);
      font-weight: 700;
      color: var(--green-deep);
      line-height: 1.35;
    }
    .section-desc {
      margin-top: 8px;
      color: var(--ink-faint);
      font-size: 0.93rem;
      max-width: 680px;
    }

    .intro-grid {
      display: grid;
      grid-template-columns: 1.35fr 0.65fr;
      gap: 32px;
      align-items: start;
    }
    .intro-body p {
      margin-bottom: 14px;
      color: var(--ink-soft);
      font-size: 0.96rem;
    }
    .intro-body p:last-child { margin-bottom: 0; }
    .intro-body strong { color: var(--green-deep); }
    .intro-stats { display: grid; grid-template-columns: 1fr; gap: 10px; }
    .stat-card {
      background: var(--paper-warm);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: 16px;
      display: flex;
      align-items: baseline;
      gap: 8px;
    }
    .stat-card .num {
      font-family: var(--serif);
      font-size: 1.4rem;
      font-weight: 700;
      color: var(--green-ink);
      flex-shrink: 0;
    }
    .stat-card .label { font-size: 0.8rem; color: var(--ink-faint); }

    .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .feature-card {
      background: #FCFAF4;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: 22px 20px;
    }
    .feature-card h3 {
      font-family: var(--serif);
      font-size: 1rem;
      color: var(--green-deep);
      margin-bottom: 6px;
    }
    .feature-card p { font-size: 0.86rem; color: var(--ink-soft); line-height: 1.75; }

    .reasons {
      background: var(--green-deep);
      border-radius: var(--radius-lg);
      padding: 38px 36px;
      color: var(--paper);
    }
    .reasons h2 { color: var(--paper); }
    .reasons .section-desc { color: rgba(247,244,236,0.7); }
    .reason-list { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 32px; margin-top: 24px; }
    .reason-item { display: flex; gap: 12px; align-items: flex-start; }
    .reason-num {
      font-family: var(--serif);
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--green-soft);
      flex-shrink: 0;
      width: 26px;
      padding-top: 2px;
    }
    .reason-item h4 { font-size: 0.94rem; margin-bottom: 3px; color: var(--paper); }
    .reason-item p { font-size: 0.84rem; color: rgba(247,244,236,0.68); line-height: 1.7; }

    .scenes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .scene-card {
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: 22px 20px;
      background: #FCFAF4;
    }
    .scene-card h3 {
      font-family: var(--serif);
      font-size: 0.96rem;
      color: var(--green-deep);
      margin-bottom: 6px;
    }
    .scene-card p { font-size: 0.84rem; color: var(--ink-soft); line-height: 1.75; }

    .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
    .step { padding: 0 18px; border-left: 1px solid var(--line); }
    .step:first-child { border-left: none; padding-left: 0; }
    .step-num {
      font-family: var(--serif);
      font-size: 0.78rem;
      color: var(--green-mid);
      letter-spacing: 0.08em;
      margin-bottom: 8px;
    }
    .step h3 {
      font-family: var(--serif);
      font-size: 0.96rem;
      color: var(--green-deep);
      margin-bottom: 6px;
    }
    .step p { font-size: 0.83rem; color: var(--ink-soft); line-height: 1.75; }
    .step code {
      display: inline-block;
      margin-top: 8px;
      font-size: 0.73rem;
      background: var(--paper-warm);
      border: 1px solid var(--line);
      padding: 3px 8px;
      border-radius: 5px;
      color: var(--green-deep);
      font-family: var(--sans);
    }

    .faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 18px; }
    .faq-item {
      background: #FCFAF4;
      border: 1px solid var(--line);
      border-radius: var(--radius-sm);
      padding: 18px 20px;
    }
    .faq-item h3 { font-size: 0.9rem; color: var(--green-deep); margin-bottom: 5px; font-weight: 600; }
    .faq-item p { font-size: 0.83rem; color: var(--ink-soft); line-height: 1.75; }

    .footer-cta { max-width: 1120px; margin: 0 auto; padding: 0 24px 56px; }
    .footer-cta-inner {
      background: var(--green-wash);
      border: 1px solid var(--green-soft);
      border-radius: var(--radius-lg);
      padding: 36px 32px;
      text-align: center;
    }
    .footer-cta-inner h2 {
      font-family: var(--serif);
      font-size: clamp(1.4rem, 2.6vw, 1.9rem);
      color: var(--green-deep);
      margin-bottom: 8px;
    }
    .footer-cta-inner p { color: var(--ink-soft); font-size: 0.92rem; margin-bottom: 18px; }

    footer {
      border-top: 1px solid var(--line);
      padding: 22px 24px;
      text-align: center;
      font-size: 0.78rem;
      color: var(--ink-faint);
    }
    footer a { color: var(--green-ink); text-decoration: none; }

    @media (max-width: 960px) {
      .hero { grid-template-columns: 1fr; gap: 28px; padding-top: 40px; }
      .intro-grid { grid-template-columns: 1fr; }
      .features-grid { grid-template-columns: 1fr 1fr; }
      .scenes { grid-template-columns: 1fr 1fr; }
      .steps { grid-template-columns: 1fr 1fr; gap: 22px 0; }
      .step:nth-child(3) { border-left: none; padding-left: 0; }
      .reason-list { grid-template-columns: 1fr; }
      .faq-list { grid-template-columns: 1fr; }
    }
    @media (max-width: 600px) {
      .nav-links { display: none; }
      .features-grid, .scenes { grid-template-columns: 1fr; }
      .steps { grid-template-columns: 1fr; }
      .step { border-left: none; padding: 0; }
      .reasons { padding: 20px 20px; }
      .section { padding: 30px 20px; }
      .hero-actions { flex-direction: column; align-items: stretch; text-align: center; }
    }