:root {
  color-scheme: light;
  --page: #F4F1EA;
  --card: #FCFBF5;
  --ink: #1B1813;
  --accent: #CB3E1C;
  --muted: #8C857A;
  --line: #DED8CC;
  --soft: #E9E4DA;
  --dark-soft: #302B21;
  --max-width: 1180px;
  --radius-large: 28px;
  --radius-medium: 18px;
  --shadow: 0 18px 45px rgba(27, 24, 19, .08);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: var(--page);
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--page);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(203, 62, 28, .42);
  outline-offset: 4px;
}

.shell {
  width: min(calc(100% - 64px), var(--max-width));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  z-index: 10;
  top: 0;
  border-bottom: 1px solid rgba(222, 216, 204, .75);
  background: rgba(244, 241, 234, .94);
}

.header-inner {
  display: flex;
  min-height: 78px;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand-mark,
.site-nav,
.hero-actions,
.hero-note,
.board-topline,
.material-heading,
.board-footer,
.section-heading,
.boundary-list,
.cta-inner,
.search-instruction,
.footer-inner {
  display: flex;
  align-items: center;
}

.brand-mark { gap: 11px; font-weight: 800; }
.brand-symbol {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  color: var(--page);
  border-radius: 11px;
  background: var(--ink);
  font-size: 17px;
  letter-spacing: -.08em;
}
.brand-name { font-size: 20px; letter-spacing: -.05em; }

.site-nav { gap: 30px; color: var(--muted); font-size: 14px; }
.site-nav a { transition: color .2s ease; }
.site-nav a:hover { color: var(--accent); }

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 0 21px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  transition: transform .2s ease, background-color .2s ease, color .2s ease;
}
.button:hover { transform: translateY(-2px); }
.button-small { min-height: 42px; padding-inline: 16px; font-size: 13px; }
.button-dark { color: var(--card); background: var(--ink); }
.button-dark:hover { background: var(--accent); }
.button-primary { color: var(--card); background: var(--accent); }
.button-primary:hover { background: #A92E12; }

.hero {
  display: grid;
  min-height: 690px;
  grid-template-columns: minmax(0, 1.05fr) minmax(380px, .95fr);
  align-items: center;
  gap: clamp(56px, 8vw, 120px);
  padding-top: 84px;
  padding-bottom: 105px;
}

.hero-copy { max-width: 620px; }
.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 21px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .17em;
  line-height: 1.3;
}
.eyebrow-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }

h1,
h2,
h3,
p { margin-top: 0; }
h1,
h2,
h3 { letter-spacing: -.065em; }
h1 {
  max-width: 690px;
  margin-bottom: 26px;
  font-size: clamp(48px, 6.7vw, 85px);
  line-height: 1.04;
}
h1 em,
h2 em { color: var(--accent); font-style: normal; }
.hero-lede {
  max-width: 520px;
  margin-bottom: 34px;
  color: #635C52;
  font-size: 19px;
  line-height: 1.75;
}
.hero-actions { flex-wrap: wrap; gap: 24px; }
.text-link { color: var(--ink); font-size: 14px; font-weight: 700; }
.text-link span { margin-left: 5px; color: var(--accent); }
.hero-note { gap: 10px; margin-top: 54px; color: var(--muted); font-size: 13px; }
.mini-check {
  display: grid;
  width: 22px;
  height: 22px;
  place-items: center;
  color: var(--card);
  border-radius: 50%;
  background: var(--ink);
  font-size: 12px;
}

.material-board {
  position: relative;
  padding: 25px;
  border: 1px solid #CEC7BA;
  border-radius: var(--radius-large);
  background: var(--card);
  box-shadow: var(--shadow);
  transform: rotate(2.5deg);
}
.material-board::before {
  position: absolute;
  z-index: -1;
  inset: 18px -15px -15px 19px;
  border: 1px solid #DDD6C9;
  border-radius: var(--radius-large);
  background: #EEEAE1;
  content: "";
  transform: rotate(-4deg);
}
.board-topline,
.board-footer { justify-content: space-between; gap: 15px; }
.signal,
.board-id,
.card-kicker,
.board-footer,
.spec-grid span { color: var(--muted); font-size: 11px; }
.signal { display: inline-flex; align-items: center; gap: 7px; font-weight: 700; }
.signal i { width: 7px; height: 7px; border-radius: 50%; background: #71945B; }
.board-id { letter-spacing: .12em; }
.steel-swatch {
  display: flex;
  height: 205px;
  align-items: flex-end;
  margin: 20px 0 22px;
  padding: 21px;
  border: 1px solid #C2C1BD;
  border-radius: 18px;
  color: rgba(27, 24, 19, .65);
  background-color: #D8D8D5;
  font-size: 48px;
  font-weight: 800;
  letter-spacing: -.08em;
}
.material-heading { align-items: flex-start; justify-content: space-between; gap: 20px; }
.card-kicker { margin-bottom: 5px; }
.material-heading h2 { margin-bottom: 0; font-size: clamp(20px, 2vw, 27px); line-height: 1.2; }
.top-tag {
  flex-shrink: 0;
  padding: 5px 9px;
  border-radius: 7px;
  color: var(--accent);
  background: #FBEAE3;
  font-size: 11px;
  font-weight: 800;
}
.spec-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px 18px;
  margin: 24px 0 22px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.spec-grid div { display: flex; flex-direction: column; gap: 4px; }
.spec-grid strong { font-size: 14px; }
.board-footer { font-size: 12px; }
.board-footer strong { color: var(--accent); font-size: 24px; letter-spacing: -.06em; }
.board-footer small { margin-left: 3px; color: var(--muted); font-size: 11px; letter-spacing: 0; }

.section { padding: 116px 0; }
.section-heading { align-items: flex-end; justify-content: space-between; gap: 40px; margin-bottom: 45px; }
.section-heading h2,
.about-panel h2,
.cta-inner h2 { margin-bottom: 0; font-size: clamp(34px, 4vw, 54px); line-height: 1.1; }
.section-intro { max-width: 290px; margin-bottom: 5px; color: var(--muted); font-size: 15px; }
.business-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.business-card {
  min-height: 330px;
  padding: 29px;
  border: 1px solid var(--line);
  border-radius: var(--radius-medium);
  background: rgba(252, 251, 245, .62);
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.business-card:hover { border-color: #B6AB9B; box-shadow: 0 15px 30px rgba(27,24,19,.06); transform: translateY(-5px); }
.business-card-featured { color: var(--card); border-color: var(--ink); background: var(--ink); }
.card-number { color: var(--muted); font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.business-card-featured .card-number { color: #AAA195; }
.business-icon { margin: 42px 0 20px; color: var(--accent); font-size: 34px; line-height: 1; }
.business-card h3 { margin-bottom: 12px; font-size: 27px; }
.business-card p { min-height: 75px; margin-bottom: 27px; color: var(--muted); font-size: 15px; line-height: 1.7; }
.business-card-featured p { color: #B7AFA1; }
.card-label { color: var(--ink); font-size: 12px; font-weight: 800; }
.business-card-featured .card-label { color: #F4B19A; }

.process-section { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #EEEAE1; }
.section-heading-tight { margin-bottom: 62px; }
.process-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin: 0; padding: 0; list-style: none; }
.process-list li { position: relative; min-height: 170px; padding: 0 28px 0 0; }
.process-list li:not(:last-child)::after { position: absolute; top: 13px; right: 27px; width: 46px; border-top: 1px solid #BDB4A5; content: ""; }
.process-list span { display: block; margin-bottom: 35px; color: var(--accent); font-size: 12px; font-weight: 800; letter-spacing: .1em; }
.process-list strong { display: block; margin-bottom: 10px; font-size: 18px; letter-spacing: -.04em; }
.process-list p { max-width: 180px; margin-bottom: 0; color: var(--muted); font-size: 14px; line-height: 1.65; }

.about-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  padding: 56px;
  border-radius: var(--radius-large);
  color: var(--card);
  background: var(--ink);
}
.about-panel .eyebrow { color: #F4B19A; }
.about-panel h2 { font-size: clamp(33px, 4vw, 51px); }
.about-copy { align-self: end; }
.about-copy > p { max-width: 445px; margin-bottom: 29px; color: #B7AFA1; font-size: 16px; line-height: 1.8; }
.boundary-list { flex-wrap: wrap; gap: 12px 25px; }
.boundary-list span { color: #E9E4DA; font-size: 13px; }
.boundary-list i { display: inline-grid; width: 20px; height: 20px; margin-right: 7px; place-items: center; color: var(--card); border-radius: 50%; background: #5E6D52; font-size: 11px; font-style: normal; font-weight: 800; }
.boundary-list span:nth-child(n+3) i { background: #6F3428; }

.cta-section { padding-top: 105px; padding-bottom: 105px; }
.cta-inner { justify-content: space-between; gap: 50px; padding: 63px 70px; border: 1px solid #D6CFC2; border-radius: var(--radius-large); background: #EAE4D9; }
.cta-inner h2 { margin-bottom: 17px; }
.cta-inner p:not(.eyebrow) { margin-bottom: 0; color: var(--muted); }
.search-instruction { min-width: 280px; gap: 15px; padding: 17px 18px; border: 1px solid #C5BCAE; border-radius: 16px; background: var(--card); }
.wechat-mark { display: grid; width: 48px; height: 48px; place-items: center; color: var(--card); border-radius: 14px; background: var(--accent); font-size: 25px; }
.search-instruction div { display: flex; flex-direction: column; }
.search-instruction strong { color: var(--muted); font-size: 11px; font-weight: 600; }
.search-instruction span:not(.wechat-mark):not(.search-arrow) { font-size: 19px; font-weight: 800; letter-spacing: -.04em; }
.search-arrow { margin-left: auto; color: var(--accent); font-size: 22px; }

.site-footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.footer-inner { min-height: 78px; justify-content: space-between; gap: 20px; }
.footer-brand { color: var(--ink); font-size: 15px; font-weight: 800; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; min-height: 0; gap: 70px; padding-top: 75px; }
  .hero-copy { max-width: 690px; }
  .material-board { width: min(100%, 540px); margin-inline: auto; }
  .about-panel { gap: 50px; padding: 45px; }
}

@media (max-width: 760px) {
  .shell { width: min(calc(100% - 40px), var(--max-width)); }
  .site-header { position: static; }
  .header-inner { min-height: 68px; gap: 12px; }
  .site-nav { display: none; }
  .brand-name { font-size: 18px; }
  .button-small { min-height: 38px; padding-inline: 13px; font-size: 12px; }
  .hero { gap: 54px; padding-top: 61px; padding-bottom: 74px; }
  h1 { margin-bottom: 22px; font-size: clamp(43px, 13vw, 66px); }
  .hero-lede { font-size: 17px; line-height: 1.7; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 19px; }
  .hero-note { align-items: flex-start; margin-top: 36px; font-size: 12px; }
  .material-board { padding: 18px; transform: rotate(1.3deg); }
  .material-board::before { right: 4px; }
  .steel-swatch { height: 165px; margin-top: 17px; font-size: 38px; }
  .section { padding: 77px 0; }
  .section-heading { align-items: flex-start; flex-direction: column; gap: 18px; margin-bottom: 29px; }
  .section-heading h2, .about-panel h2, .cta-inner h2 { font-size: 38px; }
  .section-intro { max-width: 420px; margin-bottom: 0; }
  .business-grid { grid-template-columns: 1fr; gap: 12px; }
  .business-card { min-height: 0; padding: 25px; }
  .business-icon { margin-top: 30px; }
  .business-card p { min-height: 0; }
  .process-list { grid-template-columns: 1fr 1fr; gap: 35px 20px; }
  .process-list li { min-height: 145px; padding-right: 0; }
  .process-list li:not(:last-child)::after { display: none; }
  .process-list span { margin-bottom: 22px; }
  .about-panel { grid-template-columns: 1fr; gap: 40px; padding: 31px 25px; }
  .cta-section { padding: 77px 0; }
  .cta-inner { align-items: flex-start; flex-direction: column; padding: 35px 25px; gap: 33px; }
  .search-instruction { width: 100%; min-width: 0; }
  .footer-inner { align-items: flex-start; flex-wrap: wrap; padding: 19px 0; }
}

@media (max-width: 430px) {
  .hero-note { max-width: 240px; }
  .spec-grid { gap: 13px; }
  .spec-grid strong { font-size: 13px; }
  .board-footer { align-items: flex-start; flex-direction: column; gap: 6px; }
  .process-list { grid-template-columns: 1fr; gap: 26px; }
  .process-list li { min-height: 0; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}