:root {
  color-scheme: light;
  --brand: #f47b16;
  --brand-deep: #cf590a;
  --ink: #262b32;
  --muted: #68727e;
  --line: #e8eaed;
  --soft: #fff4e9;
  --surface: #ffffff;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: #fafafa;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Segoe UI", sans-serif;
  line-height: 1.72;
}

a { color: var(--brand-deep); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; }

.site-header {
  position: sticky;
  z-index: 10;
  top: 0;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1060px, calc(100% - 40px));
  min-height: 68px;
  margin: 0 auto;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-size: 17px;
  font-weight: 750;
  text-decoration: none;
  white-space: nowrap;
}

.brand img { width: 36px; height: 36px; object-fit: contain; }
.nav-links { display: flex; align-items: center; gap: 5px; }

.nav-links a, .language-switch button {
  border: 0;
  border-radius: 9px;
  padding: 7px 10px;
  color: var(--muted);
  background: transparent;
  font: inherit;
  font-size: 13px;
  text-decoration: none;
  cursor: pointer;
}

.nav-links a:hover, .nav-links a[aria-current="page"],
.language-switch button:hover, .language-switch button[aria-pressed="true"] {
  color: var(--brand-deep);
  background: var(--soft);
}

.language-switch { display: flex; margin-left: 7px; padding-left: 9px; border-left: 1px solid var(--line); }

.hero {
  width: min(940px, calc(100% - 40px));
  margin: 0 auto;
  padding: 58px 0 34px;
}

.eyebrow { margin: 0 0 9px; color: var(--brand-deep); font-size: 12px; font-weight: 750; letter-spacing: .08em; }
.hero h1 { margin: 0; font-size: clamp(29px, 5vw, 42px); line-height: 1.2; }
.subtitle { margin: 14px 0 0; color: var(--muted); font-size: 15px; }
.meta { display: inline-block; margin-top: 16px; color: var(--muted); font-size: 12px; }

.page-shell {
  display: grid;
  grid-template-columns: 188px minmax(0, 1fr);
  width: min(1060px, calc(100% - 40px));
  margin: 0 auto 68px;
  gap: 24px;
  align-items: start;
}

.toc { position: sticky; top: 94px; padding: 12px 0; }
.toc strong { display: block; margin: 0 0 8px; font-size: 12px; color: var(--ink); }
.toc a { display: block; padding: 5px 0; color: var(--muted); font-size: 12px; text-decoration: none; }
.toc a:hover { color: var(--brand-deep); }

.document {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: clamp(24px, 5vw, 46px);
  background: var(--surface);
}

.notice {
  margin: 0 0 28px;
  border-left: 3px solid var(--brand);
  border-radius: 6px;
  padding: 12px 15px;
  background: var(--soft);
}

.document h2 { scroll-margin-top: 94px; margin: 34px 0 11px; font-size: 19px; line-height: 1.4; }
.document h2:first-of-type { margin-top: 0; }
.document p { margin: 9px 0; }
.document ul { margin: 10px 0; padding-left: 22px; }
.document li { margin: 5px 0; }
.data-table { width: 100%; margin: 16px 0; border-collapse: collapse; font-size: 13px; }
.data-table th, .data-table td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
.data-table th { background: #fbfbfc; }

.support-layout { width: min(940px, calc(100% - 40px)); margin: 0 auto 68px; }
.support-card { border: 1px solid var(--line); border-radius: 16px; padding: clamp(24px, 5vw, 46px); background: var(--surface); }
.support-card h2 { margin: 0 0 16px; font-size: 19px; }
.support-card h2:not(:first-child) { margin-top: 36px; }
.support-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.contact-item { border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; background: #fbfbfc; }
.contact-item h3 { margin: 0 0 6px; font-size: 15px; }
.contact-item p { margin: 4px 0; color: var(--muted); font-size: 13px; }
.contact-item a { overflow-wrap: anywhere; font-weight: 650; }
.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); padding: 15px 0; }
.faq summary { cursor: pointer; font-weight: 650; }
.faq p { margin: 9px 0 0; color: var(--muted); }
.faq code { font-size: .9em; }
.site-footer { padding: 0 20px 38px; color: var(--muted); text-align: center; font-size: 12px; }
.site-footer a { text-decoration: none; }
[data-lang-content][hidden] { display: none !important; }

@media (max-width: 760px) {
  .page-shell { grid-template-columns: 1fr; }
  .toc { display: none; }
}

@media (max-width: 520px) {
  .nav { width: calc(100% - 24px); }
  .nav-links a, .language-switch button { padding: 6px 7px; font-size: 12px; }
  .hero { width: calc(100% - 28px); padding-top: 42px; }
  .page-shell { width: calc(100% - 24px); }
  .document { padding: 22px 18px; }
  .support-layout { width: calc(100% - 24px); }
  .support-card { padding: 22px 18px; }
  .support-grid { grid-template-columns: 1fr; }
  .data-table { display: block; overflow-x: auto; }
}