/* 他石 · 品牌介绍页 */
.ab-page { background: var(--cs-paper); }
.ab-hero { padding: 42px 0 38px; border-bottom: 1px solid var(--cs-line); }
.ab-kicker { margin: 0 0 14px; font-family: ui-monospace, Consolas, monospace; font-size: 10px; letter-spacing: .18em; color: var(--cs-brass-3); text-transform: uppercase; }
.ab-hero__grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 44px; align-items: center; margin-top: 22px; }
.ab-hero h1 { margin: 0 0 6px; font-size: clamp(38px, 4.6vw, 62px); letter-spacing: -.05em; line-height: 1.1; }
.ab-hero__sub { margin: 0 0 18px; font-size: 16px; color: var(--cs-brass-3); font-weight: 600; }
.ab-hero__lead { margin: 0 0 18px; color: var(--cs-text-2); font-size: 14px; line-height: 1.95; }
.ab-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.ab-tags span { padding: 6px 11px; border: 1px solid var(--cs-line); background: var(--cs-paper-2); font-size: 12px; color: var(--cs-text-2); }
.ab-cta { display: flex; flex-wrap: wrap; gap: 9px; }
.ab-btn { display: inline-flex; align-items: center; justify-content: center; padding: 11px 16px; background: var(--cs-ink); color: var(--cs-paper) !important; font-size: 13px; }
.ab-btn:hover { background: var(--cs-brass-3); }
.ab-btn--ghost { background: transparent; border: 1px solid var(--cs-line); color: var(--cs-ink) !important; }
.ab-btn--ghost:hover { background: transparent; border-color: var(--cs-brass); color: var(--cs-brass-3) !important; }
.ab-hero__media { position: relative; }
.ab-hero__media img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.ab-hero__media:before { content: ""; position: absolute; left: -10px; top: -10px; right: 10px; bottom: 10px; border: 1px solid var(--cs-brass); opacity: .55; pointer-events: none; }
.ab-hero__media figcaption { margin-top: 8px; font-size: 11px; color: var(--cs-text-3); text-align: right; }
.ab-facts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: 28px; border: 1px solid var(--cs-line); background: var(--cs-line); }
.ab-facts div { background: var(--cs-paper-2); padding: 16px; }
.ab-facts strong { display: block; font-size: 22px; letter-spacing: -.02em; }
.ab-facts span { display: block; margin-top: 4px; color: var(--cs-text-3); font-size: 11px; }
.ab-section { padding: 52px 0; border-bottom: 1px solid var(--cs-line); }
.ab-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 28px; margin-bottom: 24px; }
.ab-head h2 { margin: 0; font-size: clamp(26px, 3vw, 36px); letter-spacing: -.03em; }
.ab-head p { max-width: 520px; margin: 0; color: var(--cs-text-2); font-size: 13px; line-height: 1.9; }
.ab-grid4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.ab-card { display: block; padding: 20px; border: 1px solid var(--cs-line); background: var(--cs-paper-2); }
.ab-card b { font-family: ui-monospace, Consolas, monospace; font-size: 10px; color: var(--cs-brass-3); letter-spacing: .12em; }
.ab-card h3 { margin: 9px 0 6px; font-size: 17px; }
.ab-card p { margin: 0; color: var(--cs-text-2); font-size: 12px; line-height: 1.75; }
.ab-band { background: #14191B; color: var(--cs-paper-2); padding: 48px 0; }
.ab-band .ab-kicker { color: #C99A5B; }
.ab-band h2 { margin: 0 0 12px; color: #F5F0E7; font-size: clamp(26px, 3vw, 36px); }
.ab-band p { color: #BDB5A8; font-size: 13px; line-height: 1.9; }
.ab-band__grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 32px; align-items: center; }
.ab-band__media { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.ab-band__media img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; display: block; }
.ab-flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1px; background: var(--cs-line); border: 1px solid var(--cs-line); }
.ab-flow div { background: var(--cs-paper-2); padding: 16px 14px; }
.ab-flow b { font-family: ui-monospace, Consolas, monospace; font-size: 10px; color: var(--cs-brass-3); }
.ab-flow h3 { margin: 7px 0 4px; font-size: 14px; }
.ab-flow p { margin: 0; color: var(--cs-text-3); font-size: 11px; line-height: 1.65; }
.ab-two { display: grid; grid-template-columns: 1.15fr .85fr; gap: 34px; align-items: start; }
.ab-two h2 { margin: 0 0 12px; font-size: clamp(26px, 3vw, 36px); }
.ab-two p { color: var(--cs-text-2); font-size: 13px; line-height: 1.9; }
.ab-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.ab-links a { padding: 8px 12px; border: 1px solid var(--cs-line); font-size: 12px; color: var(--cs-ink); }
.ab-links a:hover { border-color: var(--cs-brass); color: var(--cs-brass-3); }
.ab-section--last { border-bottom: 0; }
.ab-faq details { border-top: 1px solid var(--cs-line); padding: 15px 0; }
.ab-faq details:last-child { border-bottom: 1px solid var(--cs-line); }
.ab-faq summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 12px; font-size: 15px; color: var(--cs-ink); }
.ab-faq summary::-webkit-details-marker { display: none; }
.ab-faq summary:after { content: "+"; color: var(--cs-brass-3); font-size: 18px; line-height: 1; }
.ab-faq details[open] summary:after { content: "−"; }
.ab-faq p { margin: 10px 0 0; color: var(--cs-text-2); font-size: 13px; line-height: 1.9; }
.ab-contact { padding: 22px; border: 1px solid var(--cs-line); background: var(--cs-paper-2); }
.ab-contact h3 { margin: 0 0 10px; font-size: 18px; }
.ab-contact p { margin: 0 0 8px; font-size: 12.5px; line-height: 1.8; color: var(--cs-text-2); }
.ab-phone { font-size: 24px; font-weight: 700; color: var(--cs-ink) !important; letter-spacing: -.02em; }
@media (max-width: 980px) {
  .ab-hero__grid, .ab-band__grid, .ab-two { grid-template-columns: 1fr; }
  .ab-grid4 { grid-template-columns: 1fr 1fr; }
  .ab-flow { grid-template-columns: 1fr 1fr 1fr; }
}
@media (max-width: 640px) {
  .ab-hero { padding-top: 32px; }
  .ab-facts { grid-template-columns: 1fr 1fr; }
  .ab-grid4 { grid-template-columns: 1fr; }
  .ab-flow { grid-template-columns: 1fr 1fr; }
  .ab-head { display: block; }
  .ab-head p { margin-top: 8px; }
  .ab-band__media { grid-template-columns: 1fr 1fr; }
}