/* =========================================================
   臻水 Zhenshui — Design System
   Tokens · Layout · Components · Responsive · Motion
   ========================================================= */

:root {
  /* Brand palette */
  --ink: #0B1F2A;
  --ink-2: #12293A;
  --primary: #1E3A4C;
  --gold: #C6A15A;
  --gold-light: #E3C88F;
  --gold-dark: #A08340;
  --cloud: #F7F5F2;
  --white: #FFFFFF;
  --stone: #5B6468;
  --stone-light: #8A9296;
  --forest: #2D4F3C;
  --line: rgba(198, 161, 90, 0.28);
  --hairline: rgba(11, 31, 42, 0.08);

  /* Typography */
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-display: "Cormorant Garamond", "Noto Serif SC", serif;

  /* Elevation */
  --shadow-sm: 0 2px 10px rgba(11, 31, 42, 0.06);
  --shadow-md: 0 14px 38px rgba(11, 31, 42, 0.10);
  --shadow-lg: 0 28px 68px rgba(11, 31, 42, 0.16);

  /* Motion */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur-fast: 180ms;
  --dur: 320ms;
  --dur-slow: 620ms;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--cloud);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; font-family: var(--font-serif); font-weight: 400; }
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; list-style: none; }

::selection { background: var(--gold); color: var(--ink); }

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 120px 0; }
.section--tight { padding: 88px 0; }
.section--white { background: var(--white); }
.section--cloud { background: var(--cloud); }
.section--ink { background: var(--ink); color: var(--white); }

.section-head { max-width: 760px; margin-bottom: 64px; }
.section-head--center { margin-left: auto; margin-right: auto; text-align: center; }
.section-eyebrow {
  font-size: 12px;
  letter-spacing: 0.32em;
  color: var(--gold-dark);
  text-transform: uppercase;
  margin-bottom: 18px;
}
.section--ink .section-eyebrow { color: var(--gold-light); }
.section-title {
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.32;
  letter-spacing: 0.04em;
  margin-bottom: 20px;
}
.section-desc { color: var(--stone); font-size: 16px; max-width: 640px; }
.section--ink .section-desc { color: rgba(255, 255, 255, 0.68); }
.section-head--center .section-desc { margin-left: auto; margin-right: auto; }

.grid { display: grid; gap: 32px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  padding: 22px 0;
  transition: padding var(--dur) var(--ease), background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.site-header.is-scrolled {
  padding: 12px 0;
  background: rgba(11, 31, 42, 0.92);
  backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 rgba(198, 161, 90, 0.18);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; }

.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border: 1px solid var(--gold);
  border-radius: 50%;
  color: var(--gold);
}
.brand-text {
  font-family: var(--font-serif);
  font-size: 21px;
  letter-spacing: 0.2em;
  color: var(--white);
  line-height: 1.2;
}
.brand-text small {
  display: block;
  font-family: var(--font-sans);
  font-size: 9px;
  letter-spacing: 0.34em;
  color: var(--gold-light);
}

.nav { display: flex; align-items: center; gap: 30px; }
.nav a {
  position: relative;
  font-size: 14px;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.8);
  padding: 6px 0;
  transition: color var(--dur-fast) var(--ease);
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 1px;
  background: var(--gold);
  transition: width var(--dur) var(--ease);
}
.nav a:hover, .nav a.is-active { color: var(--gold-light); }
.nav a:hover::after, .nav a.is-active::after { width: 100%; }

.header-actions { display: flex; align-items: center; gap: 16px; }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 2px;
  background: transparent;
  cursor: pointer;
  padding: 0;
}
.nav-toggle span {
  display: block; width: 18px; height: 1px;
  margin: 4px auto; background: var(--white);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

.mobile-nav {
  position: fixed; inset: 0;
  z-index: 90;
  background: rgba(11, 31, 42, 0.98);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 26px;
  opacity: 0; pointer-events: none;
  transition: opacity var(--dur) var(--ease);
}
.mobile-nav.is-open { opacity: 1; pointer-events: auto; }
.mobile-nav a {
  font-family: var(--font-serif);
  font-size: 22px;
  letter-spacing: 0.16em;
  color: var(--white);
}
.mobile-nav a:hover { color: var(--gold-light); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  place-items: center;
  text-align: center;
  color: var(--white);
  overflow: hidden;
  background: linear-gradient(165deg, #0B1F2A 0%, #12384A 46%, #1E3A4C 100%);
}
.hero--page { min-height: 64vh; padding-top: 120px; }
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(120% 80% at 50% -10%, rgba(198, 161, 90, 0.20), transparent 62%),
    radial-gradient(55% 45% at 82% 22%, rgba(45, 79, 60, 0.28), transparent 70%);
}
.hero::after {
  content: "";
  position: absolute; left: 0; right: 0; bottom: 0; height: 48%;
  background: linear-gradient(180deg, rgba(11, 31, 42, 0) 0%, rgba(11, 31, 42, 0.5) 58%, rgba(11, 31, 42, 0.92) 100%);
}
.hero-inner { position: relative; z-index: 2; max-width: 940px; padding: 160px 24px 140px; }
.hero--page .hero-inner { padding: 120px 24px 90px; }
.hero-eyebrow {
  font-size: 12px; letter-spacing: 0.42em;
  color: var(--gold-light); text-transform: uppercase;
}
.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(38px, 6vw, 74px);
  line-height: 1.18;
  letter-spacing: 0.06em;
  margin: 26px 0 22px;
}
.hero-sub {
  font-size: clamp(15px, 1.5vw, 18px);
  color: rgba(255, 255, 255, 0.76);
  max-width: 620px;
  margin: 0 auto;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; margin-top: 44px; }
.hero-mountains {
  position: absolute; left: 0; right: 0; bottom: 0;
  width: 100%; height: 300px; z-index: 1;
}
.scroll-cue {
  position: absolute; left: 50%; bottom: 34px;
  transform: translateX(-50%);
  z-index: 3;
  width: 1px; height: 62px;
  background: linear-gradient(180deg, transparent, var(--gold));
}
.scroll-cue::after {
  content: ""; position: absolute; left: -3px; bottom: 0;
  width: 7px; height: 7px; border-radius: 50%; background: var(--gold);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  height: 54px; padding: 0 34px;
  border: 1px solid transparent; border-radius: 2px;
  font-family: var(--font-sans); font-size: 14px; font-weight: 400;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease),
              box-shadow var(--dur-fast) var(--ease);
}
.btn svg { width: 16px; height: 16px; }
.btn:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }
.btn--gold { background: var(--gold); color: var(--ink); }
.btn--gold:hover { background: var(--gold-light); transform: translateY(-2px); box-shadow: 0 10px 26px rgba(198, 161, 90, 0.34); }
.btn--ghost { border-color: rgba(255, 255, 255, 0.38); color: var(--white); }
.btn--ghost:hover { border-color: var(--gold); color: var(--gold-light); }
.btn--dark { background: var(--ink); color: var(--white); }
.btn--dark:hover { background: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn--sm { height: 42px; padding: 0 22px; font-size: 13px; }
.btn--block { width: 100%; }

/* ---------- Cards ---------- */
.card {
  background: var(--white);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  padding: 40px;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--line); }

.feature-icon {
  width: 52px; height: 52px;
  display: grid; place-items: center;
  border: 1px solid var(--gold);
  border-radius: 50%;
  color: var(--gold);
  margin-bottom: 22px;
}
.feature-icon svg { width: 22px; height: 22px; }
.card-title { font-size: 20px; letter-spacing: 0.06em; margin-bottom: 12px; }
.card-text { color: var(--stone); font-size: 15px; margin: 0; }

/* ---------- Stats ---------- */
.trust { background: var(--white); border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline); }
.trust .grid { gap: 24px; }
.stat { text-align: center; padding: 12px 8px; }
.stat-num {
  font-family: var(--font-display);
  font-size: clamp(30px, 3.6vw, 48px);
  line-height: 1;
  color: var(--gold-dark);
  letter-spacing: 0.02em;
}
.stat-unit { font-family: var(--font-sans); font-size: 15px; color: var(--gold-dark); margin-left: 2px; }
.stat-label { display: block; margin-top: 14px; font-size: 12px; letter-spacing: 0.2em; color: var(--stone-light); }
.section--ink .stat-num, .section--ink .stat-unit { color: var(--gold-light); }
.section--ink .stat-label { color: rgba(255, 255, 255, 0.55); }

/* ---------- Feature list ---------- */
.icon-list { display: grid; gap: 18px; margin-top: 26px; }
.icon-list li { display: flex; gap: 14px; align-items: flex-start; font-size: 15px; color: var(--stone); }
.icon-list svg { width: 18px; height: 18px; flex: none; margin-top: 4px; color: var(--gold); }
.section--ink .icon-list li { color: rgba(255, 255, 255, 0.72); }

/* ---------- Products ---------- */
.product-card {
  background: linear-gradient(180deg, var(--white) 0%, #FBF9F6 100%);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  overflow: hidden;
  display: flex; flex-direction: column;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.product-visual {
  height: 300px;
  display: grid; place-items: center;
  background: radial-gradient(60% 60% at 50% 40%, rgba(198, 161, 90, 0.16), transparent 70%), #EEF3F5;
  border-bottom: 1px solid var(--hairline);
}
.product-body { padding: 32px; display: flex; flex-direction: column; gap: 14px; flex: 1; }
.product-tag { font-size: 11px; letter-spacing: 0.24em; color: var(--gold-dark); }
.product-name { font-size: 21px; letter-spacing: 0.06em; }
.product-meta { font-size: 13px; color: var(--stone-light); letter-spacing: 0.08em; }
.product-points { display: grid; gap: 8px; font-size: 14px; color: var(--stone); }
.product-points li { padding-left: 16px; position: relative; }
.product-points li::before {
  content: ""; position: absolute; left: 0; top: 10px;
  width: 5px; height: 5px; border-radius: 50%; background: var(--gold);
}
.product-foot { margin-top: auto; padding-top: 8px; }

/* ---------- Minerals ---------- */
.mineral { display: flex; gap: 20px; align-items: flex-start; }
.mineral-symbol {
  flex: none;
  width: 58px; height: 58px;
  display: grid; place-items: center;
  border: 1px solid var(--gold);
  border-radius: 2px;
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--gold-dark);
  letter-spacing: 0.04em;
}
.mineral-name { font-size: 17px; margin-bottom: 6px; letter-spacing: 0.05em; }
.mineral-desc { font-size: 14px; color: var(--stone); margin: 0; }

/* ---------- Process ---------- */
.process { display: grid; gap: 0; }
.process-step { display: flex; gap: 28px; padding: 30px 0; border-bottom: 1px solid var(--hairline); }
.section--ink .process-step { border-color: rgba(255, 255, 255, 0.12); }
.process-num {
  flex: none;
  font-family: var(--font-display);
  font-size: 34px;
  color: var(--gold);
  line-height: 1;
  width: 70px;
}
.process-title { font-size: 18px; margin-bottom: 8px; letter-spacing: 0.05em; }
.process-text { font-size: 15px; color: var(--stone); margin: 0; }
.section--ink .process-text { color: rgba(255, 255, 255, 0.7); }

/* ---------- Timeline ---------- */
.timeline { border-left: 1px solid var(--line); padding-left: 32px; display: grid; gap: 40px; }
.timeline-item { position: relative; }
.timeline-item::before {
  content: ""; position: absolute; left: -38px; top: 6px;
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--gold); box-shadow: 0 0 0 4px rgba(198, 161, 90, 0.16);
}
.timeline-year { font-family: var(--font-display); font-size: 22px; color: var(--gold-dark); letter-spacing: 0.06em; }
.timeline-title { font-size: 18px; margin: 6px 0 8px; letter-spacing: 0.05em; }
.timeline-text { font-size: 15px; color: var(--stone); margin: 0; }

/* ---------- Badges / certification ---------- */
.badge-card {
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 34px;
  text-align: center;
  background: rgba(255, 255, 255, 0.04);
}
.badge-card .feature-icon { margin: 0 auto 20px; }
.badge-title { font-size: 17px; margin-bottom: 10px; letter-spacing: 0.06em; }
.badge-text { font-size: 14px; color: var(--stone); margin: 0; }
.section--ink .badge-text { color: rgba(255, 255, 255, 0.68); }

/* ---------- Gallery ---------- */
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.gallery-item {
  position: relative;
  border-radius: 4px;
  overflow: hidden;
  min-height: 260px;
  display: flex; align-items: flex-end;
  padding: 30px;
  color: var(--white);
  background: linear-gradient(150deg, #12384A, #0B1F2A);
}
.gallery-item::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(70% 70% at 30% 20%, rgba(198, 161, 90, 0.22), transparent 70%);
}
.gallery-label { position: relative; z-index: 2; font-size: 17px; letter-spacing: 0.1em; }
.gallery-sub { position: relative; z-index: 2; font-size: 13px; color: rgba(255, 255, 255, 0.66); margin-top: 6px; }

/* ---------- News ---------- */
.filter-tabs { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 44px; }
.filter-tab {
  height: 40px; padding: 0 22px;
  border: 1px solid var(--hairline); border-radius: 2px;
  background: var(--white); color: var(--stone);
  font-size: 13px; letter-spacing: 0.1em; cursor: pointer;
  transition: all var(--dur-fast) var(--ease);
}
.filter-tab:hover { border-color: var(--gold); color: var(--gold-dark); }
.filter-tab.is-active { background: var(--ink); border-color: var(--ink); color: var(--white); }
.news-item {
  display: grid; grid-template-columns: 150px 1fr auto;
  gap: 32px; align-items: center;
  padding: 30px 0;
  border-bottom: 1px solid var(--hairline);
  transition: background var(--dur-fast) var(--ease);
}
.news-item:hover { background: rgba(198, 161, 90, 0.05); }
.news-date { font-family: var(--font-display); font-size: 20px; color: var(--gold-dark); letter-spacing: 0.06em; }
.news-cat { display: inline-block; font-size: 11px; letter-spacing: 0.2em; color: var(--stone-light); margin-bottom: 8px; }
.news-title { font-size: 19px; letter-spacing: 0.05em; margin-bottom: 8px; }
.news-excerpt { font-size: 14px; color: var(--stone); margin: 0; }
.news-arrow { color: var(--gold); }

/* ---------- Table ---------- */
.table-wrap { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: 15px; }
.data-table th, .data-table td { padding: 18px 16px; text-align: left; border-bottom: 1px solid var(--hairline); }
.data-table th {
  font-family: var(--font-sans); font-weight: 400;
  font-size: 12px; letter-spacing: 0.18em; color: var(--stone-light);
}
.data-table td:first-child { font-family: var(--font-serif); }
.data-table tr:hover td { background: rgba(198, 161, 90, 0.05); }
.section--ink .data-table th { color: var(--gold-light); }
.section--ink .data-table th, .section--ink .data-table td { border-color: rgba(255, 255, 255, 0.12); }

/* ---------- Form ---------- */
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.field { display: grid; gap: 10px; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: 13px; letter-spacing: 0.14em; color: var(--stone-light); }
.field input, .field select, .field textarea {
  height: 54px; padding: 0 18px;
  border: 1px solid var(--hairline); border-radius: 2px;
  background: var(--white); color: var(--ink);
  font-family: var(--font-sans); font-size: 15px;
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.field textarea { height: auto; min-height: 130px; padding: 16px 18px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--gold); box-shadow: 0 0 0 3px rgba(198, 161, 90, 0.16);
}
.form-note {
  grid-column: 1 / -1;
  font-size: 14px; color: var(--forest);
  opacity: 0; transition: opacity var(--dur) var(--ease);
}
.form-note.is-visible { opacity: 1; }
.form-hint { grid-column: 1 / -1; font-size: 13px; color: var(--stone-light); }

/* ---------- CTA band ---------- */
.cta-band {
  position: relative;
  padding: 88px 0;
  background: linear-gradient(120deg, #0B1F2A 0%, #1E3A4C 100%);
  color: var(--white);
  text-align: center;
  overflow: hidden;
}
.cta-band::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(60% 100% at 50% 0%, rgba(198, 161, 90, 0.18), transparent 70%);
}
.cta-inner { position: relative; z-index: 2; max-width: 760px; margin: 0 auto; }
.cta-title { font-size: clamp(26px, 3vw, 38px); letter-spacing: 0.06em; margin-bottom: 18px; }
.cta-text { color: rgba(255, 255, 255, 0.72); margin-bottom: 34px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: rgba(255, 255, 255, 0.68); padding: 84px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 56px; }
.footer-slogan { font-family: var(--font-serif); font-size: 19px; color: var(--white); margin: 20px 0 12px; letter-spacing: 0.08em; }
.footer-desc { font-size: 14px; line-height: 1.9; }
.footer-col h4 { font-family: var(--font-sans); font-size: 12px; letter-spacing: 0.24em; color: var(--gold-light); margin-bottom: 20px; font-weight: 400; }
.footer-col a, .footer-col p { display: block; font-size: 14px; margin-bottom: 12px; }
.footer-col a:hover { color: var(--gold-light); }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 26px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  font-size: 13px;
}
.footer-bottom p { margin: 0; }

/* ---------- Utilities ---------- */
.eyebrow { font-size: 12px; letter-spacing: 0.32em; color: var(--gold-dark); text-transform: uppercase; }
.lead { font-size: 18px; color: var(--stone); line-height: 1.9; }
.section--ink .lead { color: rgba(255, 255, 255, 0.74); }
.divider { height: 1px; background: var(--line); margin: 40px 0; }
.text-gold { color: var(--gold-dark); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.center { text-align: center; }

/* ---------- Motion ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }
.reveal-d1 { transition-delay: 90ms; }
.reveal-d2 { transition-delay: 180ms; }
.reveal-d3 { transition-delay: 270ms; }

@media (prefers-reduced-motion: no-preference) {
  @keyframes floatY { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
  .float { animation: floatY 5s var(--ease) infinite; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .nav { display: none; }
  .nav-toggle { display: block; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-5 { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 860px) {
  .section { padding: 84px 0; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .grid-4, .grid-5 { grid-template-columns: repeat(2, 1fr); }
  .gallery { grid-template-columns: 1fr; }
  .news-item { grid-template-columns: 1fr; gap: 14px; }
  .news-arrow { display: none; }
  .form-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .timeline { padding-left: 24px; }
  .timeline-item::before { left: -30px; }
}
@media (max-width: 560px) {
  .container { padding: 0 18px; }
  .hero-inner { padding: 130px 18px 110px; }
  .grid-4, .grid-5 { grid-template-columns: 1fr; }
  .card { padding: 28px; }
  .product-visual { height: 240px; }
  .stat { padding: 8px 0; }
  .footer-bottom { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 图片位 Drop-in image slots ---------- */
.product-visual { position: relative; }
.hero-media { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 0; }
.media-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; background: #EEF3F5; z-index: 1; }
.media-img--contain { object-fit: contain; }

/* =========================================================
   GEO 组件：关键事实 / 问答 / 更新信息
   语义化、可被搜索引擎与 AI 直接抽取
   ========================================================= */
.page-facts { background: var(--white); border-top: 1px solid var(--hairline); padding: 56px 0 8px; }
.facts-title {
  font-family: var(--font-serif); font-size: 20px; font-weight: 500;
  letter-spacing: .1em; color: var(--ink); margin: 0 0 22px;
  padding-left: 14px; border-left: 2px solid var(--gold);
}
.facts-list { margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 0 44px; }
.fact-row { display: flex; gap: 16px; padding: 13px 0; border-bottom: 1px dashed var(--hairline); }
.fact-row dt { flex: 0 0 96px; font-size: 13px; letter-spacing: .06em; color: var(--stone-light); }
.fact-row dd { margin: 0; font-size: 15px; color: var(--ink-2); line-height: 1.6; }
.facts-meta { margin: 26px 0 0; font-size: 12.5px; color: var(--stone-light); letter-spacing: .04em; }
.facts-meta a { color: var(--gold-dark); border-bottom: 1px solid var(--line); }

.faq-section { background: var(--cloud); padding: 64px 0 72px; }
.faq-title, .faq-group-title {
  font-family: var(--font-serif); font-weight: 500; color: var(--ink);
}
.faq-title { font-size: 22px; letter-spacing: .1em; margin: 0 0 26px; padding-left: 14px; border-left: 2px solid var(--gold); }
.faq-group-title { font-size: 17px; letter-spacing: .08em; margin: 34px 0 14px; color: var(--gold-dark); }
.faq-list { display: flex; flex-direction: column; gap: 10px; }
.faq-item { background: var(--white); border: 1px solid var(--hairline); border-radius: 2px; overflow: hidden; }
.faq-item summary {
  cursor: pointer; list-style: none; padding: 18px 22px;
  font-family: var(--font-serif); font-size: 16px; font-weight: 500; color: var(--ink-2);
  display: flex; align-items: center; justify-content: space-between; gap: 18px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; font-family: var(--font-display); font-size: 22px; color: var(--gold);
  flex: 0 0 auto; transition: transform var(--dur) var(--ease);
}
.faq-item[open] summary::after { content: "−"; }
.faq-item summary:focus-visible { outline: 2px solid var(--gold); outline-offset: -4px; }
.faq-answer { padding: 0 22px 20px; }
.faq-answer p { margin: 0; font-size: 15px; line-height: 1.9; color: var(--stone); }
.faq-more, .faq-note { margin: 28px 0 0; font-size: 13px; line-height: 1.9; color: var(--stone-light); }
.faq-more a { color: var(--gold-dark); border-bottom: 1px solid var(--line); }
.faq-note { padding-top: 18px; border-top: 1px solid var(--hairline); }

.geo-notfound { padding: 160px 0 120px; text-align: center; }
.geo-notfound h1 { font-family: var(--font-display); font-size: 64px; color: var(--gold); margin: 0 0 6px; }

@media (max-width: 560px) {
  .page-facts { padding: 40px 0 4px; }
  .facts-list { grid-template-columns: 1fr; }
  .faq-section { padding: 44px 0 52px; }
  .faq-item summary { padding: 15px 16px; font-size: 15px; }
  .faq-answer { padding: 0 16px 16px; }
}