:root {
  color-scheme: light;
  --canvas: #f5f6f8;
  --surface: #ffffff;
  --ink: #1f2329;
  --muted: #646a73;
  --line: #e5e7eb;
  --blue: #3370ff;
  --blue-soft: #eef3ff;
  --cyan: #00b8d9;
  --green: #00b42a;
  --red: #f54a45;
  --shadow: 0 18px 54px rgba(31, 35, 41, .08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--canvas);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Helvetica Neue", sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

.shell { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(229, 231, 235, .8);
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(18px);
}

.nav { min-height: 66px; display: flex; align-items: center; gap: 28px; }

.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 720; letter-spacing: -.02em; }

.brand-mark { position: relative; width: 32px; height: 32px; display: inline-grid; place-items: center; }

.brand-mark::before {
  content: "";
  width: 17px;
  height: 17px;
  border: 2px solid var(--blue);
  border-radius: 50%;
  box-shadow: 0 -13px 0 -5px var(--blue), 0 13px 0 -5px var(--blue), 13px 0 0 -5px var(--blue), -13px 0 0 -5px var(--blue), 9px 9px 0 -5px var(--cyan), -9px -9px 0 -5px var(--cyan), 9px -9px 0 -5px var(--blue), -9px 9px 0 -5px var(--blue);
}

.nav-links { margin-left: auto; display: flex; align-items: center; gap: 24px; color: var(--muted); font-size: 14px; }
.nav-links a:hover, .footer a:hover { color: var(--blue); }

.nav-status { padding: 8px 12px; border: 1px solid #cbd8ff; border-radius: 8px; color: var(--blue); background: var(--blue-soft); font-weight: 650; }

.hero { display: grid; grid-template-columns: .9fr 1.1fr; align-items: center; gap: 64px; min-height: 660px; padding: 72px 0; }
.hero > * { min-width: 0; }

.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--blue); font-size: 13px; font-weight: 680; }
.eyebrow::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgba(0,180,42,.09); }

h1 { margin: 20px 0 20px; font-size: clamp(42px, 5.2vw, 68px); line-height: 1.08; letter-spacing: -.055em; font-weight: 760; }
.hero-copy { margin: 0; max-width: 540px; color: var(--muted); font-size: 18px; line-height: 1.75; }
.hero-actions { display: flex; align-items: center; gap: 12px; margin-top: 30px; }
.button { min-height: 44px; padding: 0 18px; display: inline-flex; align-items: center; justify-content: center; border-radius: 8px; font-size: 14px; font-weight: 680; }
.button.primary { color: white; background: var(--blue); box-shadow: 0 8px 22px rgba(51,112,255,.2); }
.button.secondary { border: 1px solid var(--line); background: var(--surface); }
.hero-note { margin-top: 13px; color: #8f959e; font-size: 12px; }

.app-window { width: 100%; min-width: 0; overflow: hidden; border: 1px solid #dfe2e7; border-radius: 14px; background: var(--surface); box-shadow: var(--shadow); }
.window-bar { height: 42px; display: flex; align-items: center; gap: 8px; padding: 0 14px; border-bottom: 1px solid var(--line); background: #fbfbfc; }
.traffic { width: 11px; height: 11px; border-radius: 50%; background: #ff5f57; box-shadow: 19px 0 #febc2e, 38px 0 #28c840; }
.window-title { margin: 0 auto; color: #8f959e; font-size: 11px; transform: translateX(-19px); }
.app-body { display: grid; grid-template-columns: 148px 1fr; min-height: 430px; }
.sidebar { padding: 18px 12px; border-right: 1px solid var(--line); background: #f8f9fb; }
.sidebar-brand { margin: 0 8px 18px; font-size: 13px; font-weight: 720; }
.side-item { display: flex; align-items: center; gap: 8px; height: 34px; padding: 0 10px; border-radius: 7px; color: var(--muted); font-size: 11px; }
.side-item.active { color: var(--blue); background: #eaf0ff; font-weight: 660; }
.side-icon { width: 14px; text-align: center; font-family: "SF Mono", ui-monospace, monospace; }
.app-content { padding: 24px; min-width: 0; }
.app-kicker { color: var(--muted); font-size: 10px; }
.app-heading { margin: 4px 0 18px; font-size: 20px; font-weight: 720; }

.route-panel { position: relative; overflow: hidden; display: grid; grid-template-columns: repeat(5, minmax(72px, 1fr)); gap: 0; padding: 18px 12px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.route-panel::before { content: ""; position: absolute; left: 10%; right: 10%; top: 36px; height: 1px; background: #dfe5f3; }
.route-progress { position: absolute; top: 33px; left: 9%; width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 5px rgba(0,184,217,.11); animation: route 4.4s ease-in-out infinite; }
.route-node { position: relative; z-index: 2; text-align: center; min-width: 0; }
.node-dot { width: 12px; height: 12px; margin: 0 auto 11px; border: 3px solid white; border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 1px #aec2f9; }
.route-node:last-child .node-dot { background: var(--green); box-shadow: 0 0 0 1px #91d9a3; }
.node-title { font-size: 10px; font-weight: 680; }
.node-value { margin-top: 4px; overflow-wrap: anywhere; color: var(--muted); font-family: "SF Mono", ui-monospace, monospace; font-size: 9px; line-height: 1.4; }

.metric-table { margin-top: 14px; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.metric-row { display: grid; grid-template-columns: minmax(150px, 1.5fr) .7fr .7fr .7fr; align-items: center; min-height: 46px; padding: 0 12px; border-bottom: 1px solid var(--line); font-size: 10px; }
.metric-row:last-child { border-bottom: 0; }
.metric-row.header { min-height: 32px; color: #8f959e; background: #fafbfc; font-size: 9px; }
.target { display: flex; align-items: center; gap: 8px; font-weight: 620; }
.target::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--green); }
.mono { font-family: "SF Mono", ui-monospace, monospace; font-variant-numeric: tabular-nums; }

@keyframes route { 0%, 10% { transform: translateX(0); } 90%, 100% { transform: translateX(calc(min(65vw, 440px))); } }

.section { padding: 94px 0; }
.section.white { background: var(--surface); }
.section-head { max-width: 670px; margin-bottom: 36px; }
.section h2 { margin: 10px 0 12px; font-size: clamp(30px, 4vw, 44px); letter-spacing: -.04em; }
.section-lead { margin: 0; color: var(--muted); font-size: 16px; line-height: 1.7; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.card { padding: 24px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.card-icon { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 9px; color: var(--blue); background: var(--blue-soft); font-family: "SF Mono", ui-monospace, monospace; font-size: 13px; font-weight: 700; }
.card h3 { margin: 18px 0 8px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }

.fact-strip { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.fact { padding: 22px; border-right: 1px solid var(--line); }
.fact:last-child { border-right: 0; }
.fact strong { display: block; margin-bottom: 6px; color: var(--blue); font-size: 20px; }
.fact span { color: var(--muted); font-size: 12px; line-height: 1.5; }

.pricing { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.price-card { position: relative; padding: 28px; border: 1px solid var(--line); border-radius: 13px; background: var(--surface); }
.price-card.recommended { border-color: #9eb7ff; box-shadow: 0 14px 38px rgba(51,112,255,.1); }
.badge { position: absolute; top: 18px; right: 18px; padding: 4px 8px; border-radius: 999px; color: var(--blue); background: var(--blue-soft); font-size: 10px; font-weight: 720; }
.price-name { font-size: 15px; font-weight: 680; }
.price { margin: 12px 0 4px; font-size: 38px; font-weight: 760; letter-spacing: -.04em; }
.price small { color: var(--muted); font-size: 13px; font-weight: 500; }
.price-note { min-height: 42px; color: var(--muted); font-size: 12px; line-height: 1.6; }
.features { margin: 20px 0 0; padding: 18px 0 0; border-top: 1px solid var(--line); list-style: none; }
.features li { display: flex; gap: 9px; margin: 10px 0; color: var(--muted); font-size: 12px; }
.features li::before { content: "✓"; color: var(--green); font-weight: 800; }
.purchase-disclosure { margin: 18px 0 0; color: #8f959e; font-size: 11px; line-height: 1.7; }

.privacy-block { display: grid; grid-template-columns: .8fr 1.2fr; gap: 54px; align-items: start; }
.privacy-list { display: grid; gap: 12px; }
.privacy-item { display: grid; grid-template-columns: 36px 1fr; gap: 12px; padding: 16px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.privacy-item b { font-size: 13px; }
.privacy-item p { margin: 4px 0 0; color: var(--muted); font-size: 12px; line-height: 1.6; }
.tick { width: 32px; height: 32px; display: grid; place-items: center; border-radius: 50%; color: var(--green); background: rgba(0,180,42,.08); }

.footer { padding: 38px 0; border-top: 1px solid var(--line); color: var(--muted); background: var(--surface); font-size: 12px; }
.footer-row { display: flex; align-items: center; gap: 22px; }
.footer-row .brand { margin-right: auto; color: var(--ink); }

.legal-hero { padding: 78px 0 42px; }
.legal-hero h1 { margin-bottom: 14px; font-size: clamp(36px, 5vw, 52px); }
.legal-meta { color: var(--muted); font-size: 13px; }
.legal-layout { display: grid; grid-template-columns: 210px minmax(0, 720px); gap: 54px; align-items: start; padding-bottom: 96px; }
.legal-aside { position: sticky; top: 94px; padding: 14px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.legal-aside a { display: block; padding: 8px 10px; border-radius: 6px; color: var(--muted); font-size: 12px; }
.legal-aside a:hover { color: var(--blue); background: var(--blue-soft); }
.legal-content { padding: 30px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.legal-content > p:first-child { margin-top: 0; color: var(--ink); font-size: 15px; }
.legal-content h2 { margin: 34px 0 10px; font-size: 19px; letter-spacing: -.02em; }
.legal-content h2:first-of-type { margin-top: 28px; }
.legal-content p, .legal-content li { color: var(--muted); font-size: 14px; line-height: 1.85; }
.legal-content a { color: var(--blue); }
.support-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.support-grid .card { min-height: 170px; }

@media (max-width: 920px) {
  .hero { grid-template-columns: 1fr; gap: 44px; min-height: auto; }
  .grid { grid-template-columns: 1fr 1fr; }
  .fact-strip { grid-template-columns: 1fr 1fr; }
  .fact:nth-child(2) { border-right: 0; }
  .fact:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .privacy-block { grid-template-columns: 1fr; }
  .legal-layout { grid-template-columns: 1fr; gap: 18px; }
  .legal-aside { position: static; display: flex; flex-wrap: wrap; }
}

@media (max-width: 640px) {
  .shell { width: min(100% - 24px, 1180px); }
  .nav { min-height: 58px; }
  .nav-links a:not(.nav-status) { display: none; }
  .nav-status { font-size: 0; }
  .nav-status::after { content: "即将上架"; font-size: 11px; }
  .hero { padding: 54px 0; }
  h1 { font-size: 42px; }
  .hero-copy { font-size: 16px; }
  .app-body { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .app-content { padding: 16px; }
  .route-panel { overflow-x: auto; grid-template-columns: repeat(5, 88px); }
  .metric-row { grid-template-columns: minmax(120px, 1fr) 70px 62px; }
  .metric-row > :nth-child(4) { display: none; }
  .section { padding: 68px 0; }
  .grid, .pricing, .support-grid { grid-template-columns: 1fr; }
  .fact-strip { grid-template-columns: 1fr; }
  .fact { border-right: 0; border-bottom: 1px solid var(--line); }
  .fact:last-child { border-bottom: 0; }
  .footer-row { align-items: flex-start; flex-wrap: wrap; }
  .footer-row .brand { flex-basis: 100%; }
  .legal-hero { padding-top: 56px; }
  .legal-content { padding: 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .route-progress { animation: none; left: calc(90% - 7px); }
}