/* style.css — 稀有乐器 首页 */
*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition-duration: .001ms !important; animation-duration: .001ms !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }

/* ── M1 hero ──────────────────────────────────────── */
.hero {
  position: relative;
  height: var(--hero-h);
  background: var(--dark);
  color: var(--ink-invert);
  overflow: hidden;
}
.hero-media {
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 60%;
}
.hero-media img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: 58% 36%;
  filter: saturate(.92) brightness(.86);
}
.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, var(--dark) 0%, rgba(39, 27, 18, .92) 26%, rgba(39, 27, 18, .34) 58%, rgba(39, 27, 18, .12) 100%),
    linear-gradient(180deg, rgba(39, 27, 18, .28) 0%, rgba(39, 27, 18, 0) 42%, rgba(39, 27, 18, .34) 100%);
}
.hero-inner {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 6px;
}
.eyebrow {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: .34em;
  color: var(--accent-soft);
}
.hero h1 {
  margin: 0;
  max-width: 760px;
  font-family: var(--font-serif);
  font-size: 50px;
  line-height: 1.26;
  font-weight: 700;
  letter-spacing: .04em;
  color: #f7ead4;
}
.hero-lead {
  margin: 20px 0 0;
  font-size: 19px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--ink-invert-2);
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-top: 26px;
}

/* ── M2 stats ─────────────────────────────────────── */
.stats {
  height: var(--stats-h);
  background: var(--paper-4);
  border-bottom: 1px solid var(--line);
}
.stats-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
}
.stat {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 0 44px;
  color: var(--ink);
}
.stat-icon {
  width: 22px; height: 22px;
  align-self: center;
  color: var(--accent-2);
  margin-right: 4px;
}
.stat-num {
  font-family: var(--font-serif);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--accent-2);
}
.stat-label { font-size: 15px; letter-spacing: .08em; color: var(--ink-2); }
.stat-sep { width: 1px; height: 34px; background: var(--line-strong); }

/* ── M3 pillars ───────────────────────────────────── */
.pillars {
  min-height: var(--pillars-h);
  background: var(--paper-2);
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--line);
}
.pillars-inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  padding-top: 18px;
  padding-bottom: 18px;
}
.pillar {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 4px 34px;
}
.pillar + .pillar { border-left: 1px solid var(--line); }
.pillar-icon {
  flex: none;
  width: 46px; height: 46px;
  color: var(--accent);
  margin-top: 2px;
}
.pillar h3 {
  margin: 0 0 4px;
  font-family: var(--font-serif);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--ink);
}
.pillar p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ink-3);
}

/* ── M4 categories ────────────────────────────────── */
.categories {
  padding: 30px 0 30px;
  background: var(--paper);
  scroll-margin-top: var(--header-h);
}
.cat-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 14px;
}
.cat-card {
  position: relative;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--ink);
  background: var(--paper-3);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .2s ease, box-shadow .2s ease;
}
.cat-card img {
  width: 100%;
  aspect-ratio: 173 / 190;
  object-fit: cover;
  filter: saturate(.9);
  transition: transform .4s ease;
}
.cat-body {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 34px 10px 11px;
  text-align: center;
  background: linear-gradient(180deg, rgba(29, 18, 11, 0) 0%, rgba(29, 18, 11, .82) 62%, rgba(29, 18, 11, .9) 100%);
}
.cat-name {
  display: block;
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .1em;
  color: #f8ecda;
}
.cat-desc {
  display: block;
  margin-top: 3px;
  font-size: 10.5px;
  line-height: 1.55;
  color: rgba(246, 233, 213, .82);
  letter-spacing: .02em;
}
.cat-card:hover img, .cat-card:focus-visible img { transform: scale(1.04); }
.cat-card:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* ── M5 featured ──────────────────────────────────── */
.featured {
  padding: 26px 0 30px;
  background: var(--paper-2);
}
.feat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.feat-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--ink);
  transition: transform .2s ease;
}
.feat-card img {
  width: 100%;
  aspect-ratio: 3 / 1;
  object-fit: cover;
  border-radius: var(--radius) var(--radius) 0 0;
  filter: saturate(.9);
}
.feat-card h3 {
  margin: 12px 0 6px;
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: .1em;
}
.feat-card p {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--ink-3);
}
.feat-card:hover h3, .feat-card:focus-visible h3 { color: var(--accent-2); }
.feat-card:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }

/* ── M6 craft ─────────────────────────────────────── */
.craft {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: var(--craft-h);
  background: var(--paper-2);
  border-top: 1px solid var(--line);
}
.craft-media { position: relative; overflow: hidden; }
.craft-media img {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  filter: saturate(.82) brightness(.92);
}
.craft-media::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(39, 27, 18, .22), rgba(39, 27, 18, .05));
}
.craft-body {
  padding: 22px clamp(24px, 5vw, 64px);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.craft-body h2 {
  margin: 0 0 14px;
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: .14em;
}
.craft-items { display: flex; flex-direction: column; gap: 8px; }
.craft-item { display: flex; gap: 6px; align-items: baseline; }
.craft-item h3 {
  margin: 0;
  flex: none;
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--accent-2);
  letter-spacing: .06em;
}
.craft-item p { margin: 0; font-size: 13px; line-height: 1.7; color: var(--ink-3); }

/* ── M7 care ──────────────────────────────────────── */
.care {
  scroll-margin-top: var(--header-h);
  min-height: var(--care-h);
  padding: 30px 0 32px;
  background: var(--paper);
}
.care-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.care-grid { counter-reset: care; }
.care-item {
  position: relative;
  counter-increment: care;
  padding: 4px 28px;
  display: grid;
  grid-template-columns: 34px 26px 1fr;
  grid-template-areas:
    "num icon title"
    "num icon text";
  column-gap: 8px;
  align-items: center;
}
.care-item + .care-item { border-left: 1px solid var(--line); }
.care-num {
  grid-area: num;
  align-self: center;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--accent-2);
  border: 1px solid var(--accent-soft);
  border-radius: 50%;
}
.care-num::before { content: counter(care); }
.care-icon { grid-area: icon; width: 22px; height: 22px; color: var(--accent); justify-self: center; }
.care-item h3 {
  grid-area: title;
  margin: 0 0 2px;
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: .08em;
}
.care-item p {
  grid-area: text;
  margin: 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--ink-3);
}

/* ── M8 faq ───────────────────────────────────────── */
.faq {
  padding: 22px 0 26px;
  background: var(--paper-2);
  border-top: 1px solid var(--line);
}
.faq-list { display: flex; flex-direction: column; gap: 0; }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item:first-child { border-top: 1px solid var(--line); }
.faq-item h3 { margin: 0; font-weight: 400; }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 9px 22px;
  background: var(--paper-3);
  border: 0;
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;
  font-size: 14px;
  letter-spacing: .04em;
  line-height: 1.5;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  transition: background .18s ease;
}
.faq-q:hover, .faq-q:focus-visible { background: var(--paper-4); }
.faq-q:focus-visible { outline: 1px solid var(--accent); outline-offset: -3px; }
.faq-mark {
  position: relative;
  flex: none;
  width: 14px; height: 14px;
}
.faq-mark::before,
.faq-mark::after {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  background: var(--accent-2);
  transition: transform .22s ease;
}
.faq-mark::before { width: 14px; height: 1.4px; transform: translate(-50%, -50%); }
.faq-mark::after { width: 1.4px; height: 14px; transform: translate(-50%, -50%); }
.faq-q[aria-expanded="true"] .faq-mark::after { transform: translate(-50%, -50%) scaleY(0); }
.faq-a {
  padding: 0 22px 12px;
  background: var(--paper-3);
  font-size: 13.5px;
  color: var(--ink-3);
}
.faq-a p { margin: 0; max-width: 980px; }

/* ── 响应式 ───────────────────────────────────────── */
@media (max-width: 1180px) {
  .cat-grid { grid-template-columns: repeat(4, 1fr); }
  .cat-card img { aspect-ratio: 4 / 3; }
  .hero h1 { font-size: 46px; }
  .site-nav a { padding: 6px 10px; font-size: 14px; }
}

@media (max-width: 960px) {
  .stats-inner { flex-wrap: wrap; gap: 8px 0; }
  .stat { padding: 0 20px; }
  .pillars-inner { grid-template-columns: 1fr; gap: 16px; }
  .pillar + .pillar { border-left: 0; border-top: 1px solid var(--line); padding-top: 16px; }
  .feat-grid { grid-template-columns: repeat(2, 1fr); }
  .care-grid { grid-template-columns: repeat(2, 1fr); row-gap: 20px; }
  .care-item:nth-child(3) { border-left: 0; }
  .craft { grid-template-columns: 1fr; }
  .craft-media img { aspect-ratio: 16 / 7; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 820px) {
  .site-header { height: auto; }
  .header-inner { height: auto; flex-wrap: wrap; gap: 4px 16px; padding-top: 10px; padding-bottom: 8px; }
  .site-nav {
    position: static;
    display: flex;
    flex: 1 1 100%;
    flex-wrap: wrap;
    flex-direction: row;
    align-items: center;
    gap: 2px 14px;
    margin: 0;
    padding: 0;
    background: none;
    border: 0;
  }
  .site-nav a { padding: 4px 0; font-size: 13.5px; border-left: 0; }
  .site-nav a + a { border-left: 0; border-top: 0; }
  .site-nav a[aria-current="page"]::after { display: none; }
  .nav-toggle { display: none !important; }
}

@media (max-width: 720px) {
  :root { --header-h: 68px; }
  .hero { height: auto; min-height: 480px; }
  .hero-media { width: 100%; }
  .hero-media img { object-position: 66% 30%; }
  .hero-media::after {
    background: linear-gradient(180deg, rgba(39,27,18,.82) 0%, rgba(39,27,18,.66) 42%, rgba(39,27,18,.9) 100%);
  }
  .hero-inner { padding-block: 40px 42px; justify-content: flex-end; min-height: 480px; }
  .hero h1 { font-size: 33px; line-height: 1.32; }
  .hero-lead { font-size: 15.5px; margin-top: 14px; }
  .hero-actions { margin-top: 20px; gap: 18px; }
  .stats { height: auto; }
  .stats-inner { padding: 14px 0; flex-direction: column; gap: 10px; }
  .stat-sep { width: 60px; height: 1px; }
  .section-title { font-size: 21px; margin-bottom: 22px; }
  .section-title span { padding: 0 18px; }
  .section-title span::before, .section-title span::after { width: 20px; }
  .section-title span::before { left: -18px; }
  .section-title span::after { right: -18px; }
  .cat-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .cat-card img { aspect-ratio: 3 / 2; border-radius: 0; }
  .cat-body { padding: 28px 10px 9px; }
  .cat-name { font-size: 15px; }
  .cat-desc { font-size: 10px; }
  .feat-grid { grid-template-columns: 1fr; gap: 22px; }
  .feat-card img { aspect-ratio: 16 / 7; }
  .care-grid { grid-template-columns: 1fr; row-gap: 16px; }
  .care-item { padding: 0; }
  .care-item + .care-item { border-left: 0; border-top: 1px solid var(--line); padding-top: 16px; }
  .craft-body { padding: 24px 20px 28px; }
  .faq-q { padding: 14px 16px; font-size: 14px; }
  .faq-a { padding: 0 16px 14px; }
  .footer-name { border-right: 0; }
  .footer-brand { flex-direction: column; align-items: flex-start; gap: 8px; }
  .footer-tagline, .footer-note { display: block; }
}