.antimony-guide {
  --ap-blue: #203d8a;
  --ap-deep: #172b52;
  --ap-gold: #f0be3a;
  --ap-ink: #24334a;
  --ap-muted: #59677b;
  --ap-line: #dfe5ee;
  --ap-wash: #f3f6fa;
  max-width: 1240px;
  margin: 0 auto;
  padding: 128px 30px 80px;
  color: var(--ap-ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.85;
}
.antimony-guide :where(p, h1, h2, h3, figure, dl) { margin: 0; }
.antimony-guide a { text-underline-offset: 5px; }
.antimony-guide :where(a, button, summary):focus-visible { outline: 3px solid var(--ap-blue); outline-offset: 5px; }
.antimony-guide [id] { scroll-margin-top: 110px; }
.ap-breadcrumb { display: flex; flex-wrap: wrap; gap: 10px; font-size: 12px; color: var(--ap-muted); margin-bottom: 32px; }
.ap-breadcrumb a { color: inherit; text-decoration: none; }
.ap-breadcrumb a:hover { color: var(--ap-blue); text-decoration: underline; }
.ap-hero { display: grid; grid-template-columns: 1.12fr 1fr; align-items: center; gap: 48px; padding: 8px 0 40px; }
.ap-eyebrow { color: var(--ap-blue); font-size: 12px; font-weight: 700; letter-spacing: .12em; }
.antimony-guide .ap-hero h1 { color: var(--ap-deep); font-family: "Microsoft YaHei", "PingFang SC", sans-serif; font-size: clamp(32px, 3.4vw, 46px); line-height: 1.3; letter-spacing: -.025em; margin: 18px 0 16px; }
.ap-subtitle { color: var(--ap-deep); font-size: 21px; font-weight: 600; line-height: 1.65; max-width: 23em; text-wrap: balance; }
.ap-intro { color: var(--ap-muted); margin-top: 18px !important; max-width: 32em; font-size: 15px; }
.ap-hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 22px; margin-top: 26px; }
.antimony-guide .ap-button { display: inline-flex; align-items: center; justify-content: center; gap: 20px; background: var(--ap-blue); color: #fff; padding: 12px 20px; border-radius: 4px; font-size: 14px; font-weight: 650; text-decoration: none; min-height: 46px; transition: background .15s ease; }
.antimony-guide .ap-button:hover { background: var(--ap-deep); }
.ap-text-link { font-size: 14px; color: var(--ap-blue); text-decoration: none; padding: 10px 0; }
.ap-byline { margin-top: 26px !important; color: var(--ap-muted); font-size: 12px; display: flex; gap: 12px; }
.ap-photo { overflow: hidden; border-radius: 5px; background: var(--ap-wash); }
.ap-photo img { width: 100%; height: auto; }
.ap-photo figcaption { color: var(--ap-muted); font-size: 12px; line-height: 1.6; padding: 12px 16px; }
.ap-hero-photo { align-self: center; border-bottom: 3px solid var(--ap-gold); }
.ap-hero-photo img { aspect-ratio: 800 / 552; object-fit: cover; }
.ap-facts { display: grid; grid-template-columns: repeat(4, 1fr); padding: 24px 0; border-top: 1px solid var(--ap-line); border-bottom: 1px solid var(--ap-line); }
.ap-facts > div { padding: 0 28px; border-left: 1px solid var(--ap-line); }
.ap-facts > div:first-child { padding-left: 0; border: 0; }
.ap-facts dt { font-size: 12px; color: var(--ap-muted); }
.ap-facts dd { font-size: 22px; font-weight: 650; color: var(--ap-deep); margin: 5px 0 0; line-height: 1.5; }
.ap-layout { display: grid; grid-template-columns: 206px minmax(0, 1fr); gap: 66px; margin-top: 52px; align-items: start; }
.ap-sidebar { position: sticky; top: 112px; font-size: 14px; }
.ap-nav-title { color: var(--ap-muted); font-size: 12px; margin-bottom: 14px !important; letter-spacing: .08em; }
.ap-sidebar ul { margin: 0; padding: 0 0 0 16px; border-left: 2px solid var(--ap-line); list-style: none; }
.ap-sidebar nav a { display: block; padding: 9px 0; color: var(--ap-ink); text-decoration: none; }
.ap-sidebar nav a:hover { color: var(--ap-blue); text-decoration: underline; }
.ap-side-note { border-top: 1px solid var(--ap-line); margin-top: 28px; padding-top: 22px; }
.ap-side-note > span { color: var(--ap-muted); font-size: 12px; }
.ap-side-note p { color: var(--ap-deep); margin: 8px 0 12px; font-size: 13px; }
.ap-side-note a { color: var(--ap-blue); font-size: 12px; }
.ap-content { min-width: 0; }
.ap-content > section { padding-bottom: 42px; margin-bottom: 42px; border-bottom: 1px solid var(--ap-line); }
.antimony-guide .ap-section-heading h2 { color: var(--ap-deep); font-size: 26px; letter-spacing: -.02em; line-height: 1.5; margin-bottom: 18px; }
.ap-section-heading > p { color: var(--ap-muted); margin-bottom: 24px; }
.ap-table { width: 100%; border-collapse: collapse; font-size: 15px; margin-top: 22px; }
.ap-table th, .ap-table td { text-align: left; padding: 15px 20px; border-bottom: 1px solid var(--ap-line); vertical-align: top; }
.ap-table th { width: 25%; color: var(--ap-deep); background: var(--ap-wash); font-weight: 600; }
.ap-table tr:first-child > * { border-top: 1px solid var(--ap-line); }
.ap-spec-list { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 2px solid var(--ap-blue); gap: 24px; padding-top: 22px; margin-top: 26px; }
.antimony-guide .ap-content h3 { font-size: 17px; line-height: 1.6; color: var(--ap-deep); margin-bottom: 10px; }
.ap-spec-list p { font-size: 14px; color: var(--ap-muted); }
.ap-note { font-size: 13px; color: var(--ap-muted); background: var(--ap-wash); border-left: 3px solid var(--ap-gold); padding: 14px 18px; margin-top: 24px !important; }
.ap-report-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.ap-report { border: 1px solid var(--ap-line); border-radius: 5px; padding: 24px; position: relative; background: #fff; }
.ap-report-symbol { position: absolute; right: 22px; top: 19px; font-size: 30px; color: var(--ap-blue); line-height: 1; }
.ap-report-tag { color: var(--ap-blue); font-size: 12px; margin-bottom: 15px !important; padding-right: 28px; }
.ap-report > p:last-child { color: var(--ap-muted); font-size: 14px; }
.ap-checks { list-style: none; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 10px 24px; font-size: 14px; margin: 24px 0 0; }
.ap-checks li { padding-left: 20px; position: relative; }
.ap-checks li::before { content: "✓"; position: absolute; left: 0; color: var(--ap-blue); font-weight: 700; }
.ap-content .ap-photo { margin-top: 26px; }
.ap-content .ap-photo img { aspect-ratio: 2.15; object-fit: cover; object-position: center 58%; }
.ap-planning { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.ap-planning > div { border-top: 2px solid var(--ap-blue); padding-top: 20px; }
.ap-planning p { font-size: 14px; color: var(--ap-muted); }
.ap-location { display: flex; flex-wrap: wrap; gap: 8px 10px; align-items: center; font-size: 13px; color: var(--ap-deep); border-bottom: 1px solid var(--ap-line); padding-bottom: 16px; }
.ap-location > span:last-child { margin-left: auto; color: var(--ap-muted); font-size: 12px; }
.ap-location-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ap-blue); }
.ap-steps { list-style: none; padding: 0; margin: 28px 0 0; }
.ap-steps li { display: grid; grid-template-columns: 46px minmax(0, 1fr); gap: 24px; padding-bottom: 26px; position: relative; }
.ap-steps li::before { content: ""; position: absolute; left: 22px; top: 46px; bottom: 0; width: 2px; background: var(--ap-line); }
.ap-steps li:last-child { padding-bottom: 0; }
.ap-steps li:last-child::before { display: none; }
.ap-step-number { width: 46px; height: 46px; border-radius: 50%; background: var(--ap-wash); color: var(--ap-blue); border: 1px solid var(--ap-line); display: grid; place-items: center; font-size: 16px; font-weight: 650; font-variant-numeric: tabular-nums; }
.ap-steps li > div { padding: 0 0 2px; }
.ap-step-tag { color: var(--ap-muted); font-size: 12px; display: block; margin-bottom: 4px; }
.ap-steps h3 { margin-bottom: 7px; }
.ap-steps p { font-size: 14px; color: var(--ap-muted); }
.ap-step-key .ap-step-number { background: var(--ap-blue); color: #fff; border-color: var(--ap-blue); }
.ap-step-key .ap-step-tag { color: var(--ap-blue); font-weight: 650; }
.ap-step-key > div { border-left: 3px solid var(--ap-gold); padding-left: 16px !important; }
.ap-template { margin-top: 22px; border: 1px solid var(--ap-line); padding: 16px 20px; border-radius: 4px; }
.ap-template summary { cursor: pointer; color: var(--ap-blue); font-size: 14px; padding: 3px 0; }
.ap-template pre { font: inherit; font-size: 14px; line-height: 2; white-space: pre-wrap; overflow-wrap: anywhere; color: var(--ap-muted); margin: 18px 0; }
.ap-template button { font: inherit; font-size: 13px; padding: 9px 15px; border: 1px solid var(--ap-blue); background: #fff; color: var(--ap-blue); cursor: pointer; border-radius: 3px; }
.ap-template [role="status"] { color: var(--ap-blue); font-size: 13px; }
.ap-contact { background: var(--ap-wash); border-top: 3px solid var(--ap-blue); padding: 28px; margin-top: 32px; }
.ap-contact h3 { margin: 9px 0 12px; font-size: 22px; }
.ap-contact > div > p:last-child { color: var(--ap-muted); font-size: 14px; }
.ap-contact .ap-button { margin-top: 24px; }
.ap-legal { font-size: 12px; color: var(--ap-muted); margin-top: 18px !important; }
.ap-related { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; font-size: 13px; }
.ap-related a { color: var(--ap-blue); }
@media (max-width: 1100px) {
  .antimony-guide { padding-top: 160px; }
  .antimony-guide [id] { scroll-margin-top: 160px; }
  .ap-sidebar { top: 160px; }
}
@media (max-width: 1000px) {
  .ap-layout { grid-template-columns: 170px minmax(0, 1fr); gap: 32px; }
  .ap-hero { gap: 28px; }
  .ap-subtitle { font-size: 18px; }
  .ap-facts > div { padding: 0 18px; }
  .ap-facts dd { font-size: 19px; }
}
@media (max-width: 760px) {
  .antimony-guide { padding: 155px 20px 50px; font-size: 15px; }
  .ap-breadcrumb { font-size: 11px; margin-bottom: 24px; gap: 7px; }
  .ap-hero { grid-template-columns: 1fr; gap: 24px; padding-bottom: 28px; }
  .antimony-guide .ap-hero h1 { font-size: 34px; margin-top: 14px; }
  .ap-subtitle { font-size: 19px; }
  .ap-hero-actions { gap: 12px 20px; margin-top: 22px; }
  .ap-byline { margin-top: 18px !important; }
  .ap-hero-photo img { max-height: 360px; }
  .ap-facts { grid-template-columns: 1fr 1fr; row-gap: 22px; }
  .ap-facts > div { padding: 0 16px; }
  .ap-facts > div:nth-child(odd) { padding-left: 0; border: 0; }
  .ap-facts dd { font-size: 20px; }
  .ap-layout { grid-template-columns: 1fr; gap: 30px; margin-top: 30px; }
  .ap-sidebar { position: static; }
  .ap-sidebar ul { display: grid; grid-template-columns: 1fr 1fr; gap: 0 20px; }
  .ap-sidebar nav a { font-size: 13px; padding: 8px 0; }
  .ap-nav-title { margin-bottom: 8px !important; }
  .ap-side-note { display: none; }
  .antimony-guide .ap-section-heading h2 { font-size: 23px; }
  .ap-content > section { padding-bottom: 30px; margin-bottom: 30px; }
  .ap-table { font-size: 13px; }
  .ap-table th, .ap-table td { padding: 13px 12px; }
  .ap-table th { width: 30%; }
  .ap-spec-list { gap: 16px; }
  .antimony-guide .ap-content h3 { font-size: 16px; }
  .ap-report-grid, .ap-planning { gap: 16px; grid-template-columns: 1fr; }
  .ap-report { padding: 20px; }
  .ap-checks { grid-template-columns: 1fr; }
  .ap-note { padding: 12px 14px; }
  .ap-location > span:last-child { margin-left: 18px; flex-basis: 100%; }
  .ap-steps li { grid-template-columns: 38px minmax(0, 1fr); gap: 16px; }
  .ap-step-number { width: 38px; height: 38px; font-size: 14px; }
  .ap-steps li::before { left: 18px; top: 38px; }
  .ap-contact { padding: 22px; }
  .ap-contact h3 { font-size: 20px; }
  .ap-contact .ap-button { width: 100%; }
}
@media (max-width: 380px) {
  .antimony-guide .ap-hero h1 { font-size: 30px; }
  .ap-spec-list { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html:has(.antimony-guide) { scroll-behavior: auto; }
  .antimony-guide .ap-button { transition: none; }
}