:root {
  --bg: #07111f;
  --panel: #101d30;
  --panel-2: #15243a;
  --line: #273850;
  --text: #edf3fb;
  --muted: #9eacc0;
  --gold: #e0ad52;
  --gold-2: #c97b35;
  --green: #66d49b;
  --danger: #ff9b91;
  --max: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 75% -10%, rgba(201,123,53,.16), transparent 32rem),
    radial-gradient(circle at 5% 25%, rgba(224,173,82,.08), transparent 26rem),
    var(--bg);
  font-family: Inter, "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }
.container { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid rgba(255,255,255,.08);
  background: rgba(7,17,31,.9);
  backdrop-filter: blur(14px);
}
.nav { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 800; letter-spacing: .03em; }
.brand-mark { width: 31px; height: 31px; border-radius: 9px; display: grid; place-items: center; color: #07111f; background: linear-gradient(135deg, var(--gold), var(--gold-2)); font-weight: 900; }
.nav-links { display: flex; align-items: center; gap: 24px; color: #c8d2df; font-size: 14px; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--gold); }
.nav-cta { padding: 8px 15px; border: 1px solid rgba(224,173,82,.5); border-radius: 8px; color: var(--gold) !important; }

.hero { padding: 92px 0 72px; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 56px; }
.eyebrow { margin: 0 0 16px; color: var(--gold); font-size: 13px; font-weight: 800; letter-spacing: .18em; }
h1 { margin: 0; font-size: clamp(42px, 6vw, 72px); line-height: 1.08; letter-spacing: -.04em; }
.hero-lead { margin: 24px 0 0; max-width: 620px; color: #c9d4e2; font-size: 20px; }
.hero-note { margin-top: 18px; color: var(--muted); font-size: 13px; }
.actions { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 12px; }
.button { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; padding: 10px 20px; border: 1px solid transparent; border-radius: 8px; font-weight: 800; }
.button.primary { color: #13181f; background: linear-gradient(135deg, var(--gold), #efbf68); box-shadow: 0 12px 34px rgba(224,173,82,.18); }
.button.secondary { border-color: var(--line); background: rgba(16,29,48,.7); color: #dce6f1; }
.button.disabled { pointer-events: none; color: #aeb8c5; background: #263447; }

.app-window { overflow: hidden; border: 1px solid #34465f; border-radius: 14px; background: #0e1828; box-shadow: 0 32px 80px rgba(0,0,0,.38); transform: perspective(1200px) rotateY(-2deg); }
.window-bar { height: 36px; display: flex; align-items: center; gap: 7px; padding: 0 14px; border-bottom: 1px solid #263850; background: #121f32; }
.window-bar i { width: 8px; height: 8px; border-radius: 50%; background: #46566b; }
.window-bar i:first-child { background: var(--gold-2); }
.app-window img { aspect-ratio: 1.48 / 1; object-fit: cover; object-position: top left; }

.section { padding: 76px 0; }
.section.alt { border-block: 1px solid rgba(255,255,255,.06); background: rgba(16,29,48,.42); }
.section-heading { max-width: 760px; margin-bottom: 34px; }
.section-heading span { color: var(--gold); font-size: 13px; font-weight: 800; letter-spacing: .14em; }
h2 { margin: 8px 0 12px; font-size: clamp(30px, 4vw, 46px); line-height: 1.2; letter-spacing: -.025em; }
.section-heading p { margin: 0; color: var(--muted); }

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { padding: 24px; border: 1px solid var(--line); border-radius: 12px; background: linear-gradient(145deg, rgba(21,36,58,.9), rgba(12,25,42,.86)); }
.card .number { display: inline-grid; width: 34px; height: 34px; place-items: center; border-radius: 8px; color: var(--gold); background: rgba(224,173,82,.11); font-weight: 800; }
.card h3 { margin: 18px 0 8px; font-size: 19px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; counter-reset: step; }
.step { position: relative; padding: 23px 20px; border: 1px solid var(--line); border-radius: 10px; background: rgba(16,29,48,.72); }
.step::before { counter-increment: step; content: "0" counter(step); display: block; margin-bottom: 16px; color: var(--gold); font-weight: 800; font-size: 13px; }
.step strong { display: block; margin-bottom: 6px; }
.step span { color: var(--muted); font-size: 13px; }

.preview-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 24px; align-items: center; }
.preview-copy ul { padding: 0; margin: 24px 0; list-style: none; }
.preview-copy li { margin: 10px 0; color: #c7d2e0; }
.preview-copy li::before { content: "✓"; margin-right: 10px; color: var(--green); }
.preview-image { overflow: hidden; border: 1px solid #34465f; border-radius: 12px; background: #fff; box-shadow: 0 28px 70px rgba(0,0,0,.35); }
.preview-image img { width: 100%; }

.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.price { position: relative; padding: 28px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
.price.recommended { border-color: rgba(224,173,82,.64); box-shadow: 0 0 0 1px rgba(224,173,82,.18), 0 22px 60px rgba(0,0,0,.24); }
.price-tag { position: absolute; right: 18px; top: 18px; padding: 3px 9px; border-radius: 999px; color: #17130b; background: var(--gold); font-size: 11px; font-weight: 800; }
.price h3 { margin: 0; }
.price-value { margin: 18px 0 20px; font-size: 38px; font-weight: 900; }
.price-value small { font-size: 13px; color: var(--muted); font-weight: 500; }
.price ul { min-height: 112px; padding-left: 18px; color: #c7d2e0; font-size: 14px; }
.price .button { width: 100%; }
.price-note { margin-top: 20px; color: var(--muted); font-size: 13px; text-align: center; }

.notice { padding: 20px 22px; border-left: 3px solid var(--gold); border-radius: 0 9px 9px 0; background: rgba(224,173,82,.09); color: #d5deea; }
.faq { display: grid; gap: 10px; }
details { padding: 16px 18px; border: 1px solid var(--line); border-radius: 9px; background: rgba(16,29,48,.7); }
summary { cursor: pointer; font-weight: 700; }
details p { color: var(--muted); }

.page-hero { padding: 72px 0 42px; border-bottom: 1px solid rgba(255,255,255,.06); }
.page-hero h1 { font-size: clamp(36px, 5vw, 58px); }
.page-hero p { max-width: 760px; color: var(--muted); font-size: 17px; }
.content-layout { display: grid; grid-template-columns: 240px 1fr; gap: 46px; padding: 56px 0 88px; }
.toc { position: sticky; top: 92px; align-self: start; display: grid; gap: 8px; padding: 16px; border: 1px solid var(--line); border-radius: 10px; background: rgba(16,29,48,.75); }
.toc strong { margin-bottom: 5px; color: var(--gold); }
.toc a { color: var(--muted); font-size: 13px; }
.toc a:hover { color: var(--gold); }
.prose { min-width: 0; }
.prose section { scroll-margin-top: 94px; margin-bottom: 50px; }
.prose h2 { margin: 0 0 16px; font-size: 29px; }
.prose h3 { margin-top: 28px; }
.prose p, .prose li { color: #b9c6d6; }
.prose code { padding: 2px 6px; border: 1px solid #34455d; border-radius: 5px; color: #f2c979; background: #101c2d; }
.help-steps { padding-left: 20px; }
.help-steps li { margin: 11px 0; padding-left: 5px; }
.callout { margin: 20px 0; padding: 16px 18px; border: 1px solid #38506e; border-radius: 8px; background: #12243a; color: #cfdae7; }
.callout.warning { border-color: rgba(224,173,82,.45); background: rgba(224,173,82,.08); }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; border: 1px solid var(--line); }
th, td { padding: 12px 14px; border-bottom: 1px solid var(--line); text-align: left; }
th { color: var(--gold); background: #14233a; }
td { color: #b9c6d6; }

.download-card { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center; padding: 28px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
.download-card h2 { margin-top: 0; }
.status-pill { display: inline-flex; padding: 4px 9px; border: 1px solid rgba(224,173,82,.35); border-radius: 999px; color: var(--gold); background: rgba(224,173,82,.08); font-size: 12px; font-weight: 800; }

.site-footer { padding: 34px 0; border-top: 1px solid rgba(255,255,255,.08); color: var(--muted); font-size: 13px; }
.footer-grid { display: flex; justify-content: space-between; gap: 24px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 18px; }
.footer-links a:hover { color: var(--gold); }

@media (max-width: 860px) {
  .nav-links a:not(.nav-cta) { display: none; }
  .hero { padding-top: 60px; }
  .hero-grid, .preview-grid, .content-layout { grid-template-columns: 1fr; }
  .app-window { transform: none; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .steps, .price-grid { grid-template-columns: 1fr 1fr; }
  .toc { position: static; grid-template-columns: repeat(2, 1fr); }
  .toc strong { grid-column: 1 / -1; }
}

@media (max-width: 580px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .brand { font-size: 16px; }
  .nav-cta { padding: 7px 10px; }
  h1 { font-size: 42px; }
  .hero-lead { font-size: 17px; }
  .feature-grid, .steps, .price-grid { grid-template-columns: 1fr; }
  .section { padding: 58px 0; }
  .download-card { grid-template-columns: 1fr; }
  .footer-grid { flex-direction: column; }
}