:root {
  color-scheme: dark;
  --bg: #000;
  --surface: #1c1c1e;
  --surface-2: #2c2c2e;
  --surface-3: #3a3a3c;
  --text: #fff;
  --muted: rgba(235, 235, 245, .68);
  --subtle: rgba(235, 235, 245, .38);
  --line: rgba(84, 84, 88, .65);
  --blue: #4b83bd;
  --blue-soft: rgba(75, 131, 189, .18);
  --red: #ff453a;
  --radius: 16px;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", sans-serif;
  --mono: "SFMono-Regular", Consolas, monospace;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-height: 100vh; background: var(--bg); color: var(--text); font: 14px/1.65 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; }
button, input, textarea { font: inherit; }
.site-header { position: sticky; top: 0; z-index: 10; border-bottom: 1px solid var(--line); background: rgba(0, 0, 0, .82); backdrop-filter: blur(22px); }
.nav { width: min(1040px, calc(100% - 32px)); height: 58px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 750; letter-spacing: -.02em; }
.brand-mark { width: 28px; height: 28px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 8px; color: var(--muted); background: var(--surface); }
.nav-links { display: flex; align-items: center; gap: 18px; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: 12px; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--text); }
.page { width: min(1040px, calc(100% - 32px)); margin: 0 auto; padding: 72px 0 64px; }
.hero { max-width: 760px; margin-bottom: 44px; }
.eyebrow { display: inline-flex; padding: 5px 10px; border: 1px solid var(--line); border-radius: 99px; color: var(--muted); background: var(--surface); font: 700 11px/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.hero h1 { margin: 18px 0 12px; font-size: clamp(34px, 7vw, 58px); line-height: 1.08; letter-spacing: -.055em; }
.hero p { margin: 0; color: var(--muted); font-size: 16px; }
.section-title { margin: 0 0 14px; color: var(--subtle); font-size: 11px; letter-spacing: .09em; text-transform: uppercase; }
.extension-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.extension-card { display: flex; flex-direction: column; min-height: 260px; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.card-head { display: flex; align-items: center; gap: 13px; }
.card-icon { width: 48px; height: 48px; border-radius: 11px; }
.card-title { margin: 0; font-size: 18px; letter-spacing: -.025em; }
.card-type { margin: 2px 0 0; color: var(--subtle); font: 11px var(--mono); }
.card-desc { flex: 1; margin: 18px 0; color: var(--muted); }
.card-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 38px; padding: 0 14px; border: 1px solid var(--line); border-radius: 10px; color: var(--muted); background: transparent; text-decoration: none; font-size: 12px; font-weight: 650; transition: .15s ease; }
.button:hover { color: var(--text); background: var(--surface-2); }
.button-primary { color: #fff; border-color: transparent; background: var(--blue); }
.button-primary:hover { background: #568fc9; }
.callout { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 32px; padding: 20px 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.callout h2 { margin: 0 0 3px; font-size: 16px; }
.callout p { margin: 0; color: var(--muted); font-size: 12px; }
.policy-page { width: min(780px, calc(100% - 32px)); }
.policy-head { margin-bottom: 34px; }
.policy-back { color: var(--subtle); text-decoration: none; font-size: 12px; }
.policy-head h1 { margin: 18px 0 3px; font-size: clamp(31px, 7vw, 46px); line-height: 1.12; letter-spacing: -.045em; }
.policy-product { margin: 0; color: var(--muted); font-size: 17px; }
.policy-meta { margin: 8px 0 0; color: var(--subtle); font-size: 12px; }
.policy-note { margin-top: 18px; padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px; color: var(--muted); background: var(--surface); font-size: 12px; }
.policy-list { display: grid; gap: 8px; }
.policy-item { overflow: hidden; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); }
.policy-item summary { display: grid; grid-template-columns: 36px 1fr 18px; align-items: center; gap: 10px; padding: 15px 17px; cursor: pointer; list-style: none; }
.policy-item summary::-webkit-details-marker { display: none; }
.policy-item summary:hover { background: rgba(120,120,128,.12); }
.policy-number { color: var(--subtle); font: 11px var(--mono); }
.policy-label { font-weight: 700; }
.policy-chevron { color: var(--subtle); transition: transform .2s ease; }
.policy-item[open] .policy-chevron { transform: rotate(180deg); }
.policy-content { padding: 2px 18px 18px 63px; border-top: 1px solid var(--line); color: var(--muted); }
.policy-content p { margin: 13px 0 0; }
.policy-content ul { margin: 12px 0 0; padding-left: 20px; }
.policy-content li + li { margin-top: 7px; }
.policy-content strong { color: var(--text); }
.contact-layout { display: grid; grid-template-columns: 1fr .7fr; gap: 14px; }
.contact-card { padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.contact-card h2 { margin: 0 0 8px; font-size: 18px; }
.contact-card p { color: var(--muted); }
.email-link { display: block; margin: 22px 0; overflow-wrap: anywhere; color: var(--text); font: 700 clamp(18px, 4vw, 28px) var(--mono); text-decoration: none; }
.contact-list { margin: 0; padding-left: 20px; color: var(--muted); }
.site-footer { border-top: 1px solid var(--line); }
.footer-inner { width: min(1040px, calc(100% - 32px)); margin: 0 auto; padding: 24px 0; display: flex; justify-content: space-between; gap: 16px; color: var(--subtle); font-size: 11px; }
.footer-inner a { color: var(--muted); text-decoration: none; }
@media (max-width: 720px) {
  .page { padding-top: 46px; }
  .extension-grid, .contact-layout { grid-template-columns: 1fr; }
  .callout { align-items: stretch; flex-direction: column; }
  .callout .button { width: 100%; }
}
@media (max-width: 520px) {
  .nav-links a:first-child { display: none; }
  .extension-card { min-height: 0; }
  .policy-item summary { grid-template-columns: 28px 1fr 18px; padding: 14px; }
  .policy-content { padding: 2px 14px 16px 52px; }
  .footer-inner { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) { * { transition-duration: .01ms !important; } }