:root {
    --primary: #0d9e4f;
    --primary-dark: #087a3a;
    --primary-light: #e3f7eb;
    --accent: #2ec27e;
    --secondary: #1e6f9f;
    --ink: #1a1e2b;
    --muted: #5d6472;
    --bg: #f6f8fc;
    --card: #ffffff;
    --border: #e2e8f0;
    --radius: 18px;
    --shadow-sm: 0 4px 14px rgba(0,0,0,0.04);
    --shadow-md: 0 12px 30px rgba(13,158,79,0.08);
  }
  * { margin:0; padding:0; box-sizing:border-box; }
  html { background:var(--bg); scroll-behavior:smooth; }
  body {
    font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
    color:var(--ink);
    line-height:1.7;
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
  }
  a { text-decoration:none; color:inherit; }
  .container { width:100%; max-width:1160px; margin:0 auto; padding:0 20px; }

  /* ===== Header ===== */
  header.site-header {
    position:sticky; top:0; z-index:50;
    background:rgba(255,255,255,0.9);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--border);
  }
  .nav { display:flex; align-items:center; justify-content:space-between; height:70px; }
  .logo { display:flex; align-items:center; gap:12px; font-weight:700; font-size:20px; }
  .logo img { width:40px; height:40px; border-radius:10px; }
  .logo-text { font-weight:700; font-size:20px; }
  .logo-text b { color:var(--primary); }
  .nav-cta {
    background:var(--primary); color:#fff; padding:10px 22px; border-radius:999px;
    font-size:14px; font-weight:600; transition:background .2s, transform .2s;
  }
  .nav-cta:hover { background:var(--primary-dark); transform:translateY(-1px); }

  /* ===== Hero（背景微调：底色改为 #e3f7eb，绿色渐变加强） ===== */
  .hero {
    padding:60px 0 50px;
    background:
      radial-gradient(800px 400px at 80% -10%, rgba(13,158,79,0.15), transparent 60%),
      radial-gradient(600px 300px at 10% 10%, rgba(46,194,126,0.1), transparent 60%),
      #e3f7eb;
  }
  .hero-grid { display:grid; grid-template-columns:1.05fr 0.95fr; gap:50px; align-items:center; }
  .badge {
    display:inline-flex; align-items:center; gap:8px;
    background:var(--primary-light); color:var(--primary-dark);
    padding:6px 16px; border-radius:999px; font-size:13px; font-weight:600;
    margin-bottom:20px;
  }
  .badge .dot { width:7px; height:7px; border-radius:50%; background:var(--primary); }
  .hero h1 {
    font-size:42px; line-height:1.2; font-weight:800; letter-spacing:-0.5px;
    margin-bottom:18px; text-wrap:balance;
  }
  .hero h1 .hl { color:var(--primary); }
  /* 属性整合区域 */
  .hero-attrs {
    display:flex; flex-wrap:wrap; gap:18px; font-size:14px; color:var(--muted);
    margin-bottom:28px;
  }
  .hero-attrs span { display:inline-flex; align-items:center; gap:6px; }
  .hero-attrs svg { width:16px; height:16px; color:var(--primary); }
  .download-area {
    display:flex; flex-direction:column; align-items:flex-start; gap:10px;
  }
  .btn-download {
    display:inline-flex; align-items:center; gap:12px;
    background:var(--primary); color:#fff; padding:16px 34px; border-radius:14px;
    font-size:18px; font-weight:700;
    box-shadow:0 12px 28px rgba(13,158,79,0.35);
    transition:transform .15s, box-shadow .15s, background .2s;
  }
  .btn-download:hover { background:var(--primary-dark); transform:translateY(-2px); box-shadow:0 16px 34px rgba(13,158,79,0.45); }
  .btn-download svg { width:26px; height:26px; }
  .btn-sub { font-size:14px; color:var(--muted); }

  /* Hero visual: 简洁软件详情窗口 */
  .hero-visual {
    background:var(--card); border:1px solid var(--border); border-radius:var(--radius);
    box-shadow:var(--shadow-md); overflow:hidden;
  }
  .window-bar {
    display:flex; align-items:center; gap:8px; padding:12px 16px;
    background:#f1f4f9; border-bottom:1px solid var(--border);
  }
  .window-bar .dots { display:flex; gap:6px; }
  .window-bar .dots i { width:11px; height:11px; border-radius:50%; display:inline-block; }
  .window-bar .dots i:nth-child(1) { background:#ff5f57; }
  .window-bar .dots i:nth-child(2) { background:#febc2e; }
  .window-bar .dots i:nth-child(3) { background:#28c840; }
  .window-bar .window-title { flex:1; text-align:center; font-size:13px; font-weight:600; color:var(--ink); }
  .soft-detail {
    display:flex; flex-direction:column; align-items:center; justify-content:center;
    padding:30px 20px; text-align:center;
  }
  .soft-detail img.soft-icon {
    width:80px; height:80px; border-radius:18px; margin-bottom:16px;
    box-shadow:0 8px 20px rgba(0,0,0,0.08);
  }
  .soft-detail h2 {
    font-size:20px; font-weight:700; margin-bottom:6px;
  }
  .soft-detail .soft-version {
    font-size:14px; color:var(--muted); margin-bottom:16px;
  }
  .soft-detail .install-btn-big {
    background:var(--primary); color:#fff; padding:12px 32px; border-radius:12px;
    font-size:16px; font-weight:600; transition:background .2s;
  }
  .soft-detail .install-btn-big:hover { background:var(--primary-dark); }

  /* ===== 核心功能场景 ===== */
  .feature-scene { padding:80px 0; background:var(--card); }
  .scene-head { text-align:center; max-width:680px; margin:0 auto 50px; }
  .scene-head h2 { font-size:32px; font-weight:800; margin-bottom:12px; }
  .scene-head p { color:var(--muted); font-size:17px; }
  .scene-grid { display:grid; grid-template-columns:repeat(3, 1fr); gap:28px; }
  .scene-card {
    background:var(--bg); border-radius:var(--radius); padding:28px 24px;
    transition:transform .2s, box-shadow .2s; position:relative; overflow:hidden;
  }
  .scene-card:hover { transform:translateY(-5px); box-shadow:var(--shadow-md); }
  .scene-card .scene-icon {
    width:60px; height:60px; border-radius:16px; background:#fff;
    display:flex; align-items:center; justify-content:center; margin-bottom:20px;
    box-shadow:0 8px 20px rgba(0,0,0,0.06);
  }
  .scene-card .scene-icon svg { width:32px; height:32px; color:var(--primary); }
  .scene-card h3 { font-size:19px; margin-bottom:10px; }
  .scene-card p { color:var(--muted); font-size:15px; }
  .scene-card .tag {
    position:absolute; top:20px; right:20px; background:var(--primary-light);
    color:var(--primary-dark); font-size:12px; font-weight:600; padding:4px 10px; border-radius:999px;
  }

  /* ===== 深度展示 ===== */
  .deep-showcase { padding:80px 0; background:var(--bg); }
  .showcase-row { display:grid; grid-template-columns:1fr 1fr; gap:40px; align-items:center; margin-bottom:60px; }
  .showcase-row.reverse { direction:rtl; }
  .showcase-row.reverse > * { direction:ltr; }
  .showcase-text h2 { font-size:28px; font-weight:800; margin-bottom:14px; }
  .showcase-text p { color:var(--muted); font-size:16px; margin-bottom:18px; }
  .showcase-text ul { list-style:none; }
  .showcase-text li { margin-bottom:12px; display:flex; align-items:center; gap:10px; }
  .showcase-text li svg { width:20px; height:20px; color:var(--primary); flex-shrink:0; }
  .showcase-visual {
    background:var(--card); border-radius:var(--radius); border:1px solid var(--border);
    padding:20px; box-shadow:var(--shadow-sm);
  }
  .showcase-visual .mock-window { border:1px solid var(--border); border-radius:12px; overflow:hidden; }
  .mock-window .bar { background:#f1f4f9; padding:8px 12px; display:flex; align-items:center; gap:6px; }
  .mock-window .bar i { width:10px; height:10px; border-radius:50%; display:inline-block; }
  .mock-window .bar i:nth-child(1){background:#ff5f57} .mock-window .bar i:nth-child(2){background:#febc2e} .mock-window .bar i:nth-child(3){background:#28c840}
  .mock-window .content { padding:16px; font-size:13px; color:var(--muted); }
  .progress-bar { height:8px; background:#e2e8f0; border-radius:99px; margin:10px 0; overflow:hidden; }
  .progress-bar .fill { height:100%; width:80%; background:var(--primary); border-radius:99px; }
  .badge-list { display:flex; gap:8px; flex-wrap:wrap; }
  .badge-list span { background:var(--primary-light); color:var(--primary-dark); padding:4px 10px; border-radius:6px; font-size:12px; }

  /* ===== 步骤 ===== */
  .steps { padding:80px 0; background:var(--bg); }
  .steps-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:28px; }
  .step { background:var(--card); border-radius:var(--radius); padding:30px 24px; text-align:center; box-shadow:var(--shadow-sm); }
  .step .num {
    width:48px; height:48px; border-radius:50%; background:var(--primary); color:#fff;
    font-size:22px; font-weight:800; display:flex; align-items:center; justify-content:center;
    margin:0 auto 16px;
  }
  .step h3 { font-size:18px; margin-bottom:8px; }
  .step p { color:var(--muted); font-size:15px; }

  /* ===== 版本信息 ===== */
  .specs { padding:80px 0; background:var(--card); }
  .spec-table { max-width:760px; margin:0 auto; border:1px solid var(--border); border-radius:var(--radius); overflow:hidden; }
  .spec-row { display:grid; grid-template-columns:200px 1fr; border-bottom:1px solid var(--border); }
  .spec-row:last-child { border-bottom:none; }
  .spec-row .k { background:var(--primary-light); padding:16px 22px; font-weight:600; color:var(--primary-dark); }
  .spec-row .v { padding:16px 22px; }

  /* ===== FAQ ===== */
  .faq { padding:80px 0; background:var(--bg); }
  .faq-list { max-width:800px; margin:0 auto; }
  details.faq-item {
    background:var(--card); border:1px solid var(--border); border-radius:14px;
    padding:4px 22px; margin-bottom:14px;
  }
  details.faq-item summary {
    list-style:none; cursor:pointer; padding:18px 0; font-weight:600; font-size:16px;
    display:flex; align-items:center; justify-content:space-between;
  }
  details.faq-item summary::-webkit-details-marker { display:none; }
  details.faq-item summary .plus { width:22px; height:22px; position:relative; flex-shrink:0; transition:transform .2s; }
  details.faq-item summary .plus::before, details.faq-item summary .plus::after {
    content:""; position:absolute; background:var(--primary); border-radius:2px; top:50%; left:50%; transform:translate(-50%,-50%);
  }
  details.faq-item summary .plus::before { width:14px; height:2px; }
  details.faq-item summary .plus::after { width:2px; height:14px; }
  details.faq-item[open] summary .plus::after { opacity:0; }
  details.faq-item p { color:var(--muted); padding:0 0 20px; font-size:15px; }

  /* ===== CTA ===== */
  .cta-banner {
    background:linear-gradient(135deg, #0d9e4f, #087a3a); color:#fff; text-align:center; padding:80px 0;
  }
  .cta-banner h2 { font-size:32px; margin-bottom:14px; }
  .cta-banner p { font-size:17px; opacity:.92; margin-bottom:30px; }
  .cta-banner .btn-download { background:#fff; color:var(--primary-dark); box-shadow:0 12px 24px rgba(0,0,0,0.15); }
  .cta-banner .btn-download:hover { background:#f0faf4; }

  /* ===== Footer ===== */
  footer.site-footer { background:#11151a; color:#9aa3af; padding:50px 0 30px; font-size:14px; }
  .footer-top { display:flex; flex-wrap:wrap; justify-content:space-between; gap:28px; padding-bottom:26px; border-bottom:1px solid #232a32; }
  .footer-top .logo { color:#fff; }
  .footer-bottom { padding-top:22px; text-align:center; line-height:1.9; }
  .footer-bottom a:hover { color:#fff; }

  /* ===== Responsive ===== */
  @media (max-width: 900px) {
    .hero-grid, .showcase-row, .steps-grid { grid-template-columns:1fr; }
    .hero h1 { font-size:32px; }
    .scene-grid { grid-template-columns:1fr; }
    .spec-row { grid-template-columns:130px 1fr; }
    .showcase-row.reverse { direction:ltr; }
  }
  @media (max-width: 560px) {
    .btn-download { width:100%; justify-content:center; }
    .soft-detail img.soft-icon { width:60px; height:60px; }
  }