:root {
  --ink: #221b16;
  --paper: #f3eadc;
  --clay: #c5532d;
  --wood: #d8b785;
  --paper-deep: #e9dcc8;
  --line: rgba(34, 27, 22, 0.24);
  --wrap: min(70rem, calc(100% - 2rem));
  color-scheme: light;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    repeating-linear-gradient(92deg, transparent 0 46px, rgba(34, 27, 22, 0.025) 47px, transparent 48px),
    radial-gradient(circle at 85% 7%, rgba(216, 183, 133, 0.32), transparent 26rem);
  font-family: "Noto Serif CJK SC", "Source Han Serif SC", "Songti SC", SimSun, serif;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }
.wrap { width: var(--wrap); margin-inline: auto; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 20; padding: .75rem 1rem; background: var(--ink); color: var(--paper); }
.skip-link:focus { top: 1rem; }
:focus-visible { outline: 3px solid var(--clay); outline-offset: 4px; }

.masthead { position: relative; z-index: 2; border-bottom: 1px solid var(--line); background: rgba(243, 234, 220, .93); }
.masthead__bar { min-height: 4rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.wordmark { min-height: 44px; display: inline-flex; align-items: center; gap: .6rem; font-weight: 900; font-size: 1.2rem; text-decoration: none; letter-spacing: .08em; }
.wordmark span { padding-left: .6rem; border-left: 1px solid var(--line); font: 700 .75rem/1.2 "Microsoft YaHei", "PingFang SC", sans-serif; letter-spacing: .12em; }
.section-nav { display: flex; overflow-x: auto; border-top: 1px solid var(--line); }
.section-nav a { min-height: 44px; min-width: 4.75rem; display: grid; place-items: center; padding-inline: .8rem; border-right: 1px solid var(--line); font: 700 .78rem/1 "Microsoft YaHei", "PingFang SC", sans-serif; text-decoration: none; letter-spacing: .08em; }

.phone-link { min-height: 52px; display: inline-flex; align-items: center; justify-content: space-between; gap: 1.1rem; padding: .65rem 1rem; color: #fff8ed; background: #8f321d; border: 1px solid var(--clay); text-decoration: none; font: 700 .83rem/1.25 "Microsoft YaHei", "PingFang SC", sans-serif; }
.phone-link strong { font-size: 1.03rem; letter-spacing: .04em; }
.phone-link--quiet { min-height: 44px; padding-block: .5rem; color: var(--ink); background: transparent; border-color: var(--ink); }
.preview-banner { padding: .7rem 1rem; color: #fff8ed; background: var(--ink); border-bottom: 4px solid var(--clay); text-align: center; font: 900 .9rem/1.4 "Microsoft YaHei", "PingFang SC", sans-serif; letter-spacing: .08em; }

.hero { min-height: 39rem; display: grid; align-items: center; padding: 4rem 0 3rem; border-bottom: 1px solid var(--line); overflow: hidden; }
.hero__grid { display: grid; gap: 3rem; }
.eyebrow, .index, .fact-slip__label { margin: 0 0 1rem; font: 700 .7rem/1.3 "Microsoft YaHei", "PingFang SC", sans-serif; letter-spacing: .18em; text-transform: uppercase; }
h1, h2, p { margin-top: 0; }
h1 { max-width: 12ch; margin-bottom: 1.5rem; font-size: clamp(2.8rem, 13vw, 6.8rem); line-height: .98; letter-spacing: -.065em; }
h1 em { color: var(--clay); font-style: normal; }
.hero__lead { max-width: 30rem; font-size: 1.07rem; }
.hero__actions { display: flex; flex-direction: column; align-items: stretch; gap: .85rem; margin-top: 2rem; }
.text-link { min-height: 44px; display: inline-flex; align-items: center; justify-content: space-between; border-bottom: 1px solid currentColor; font-weight: 700; text-decoration: none; }
.fact-slip { position: relative; padding: 1.25rem; background: var(--wood); border: 1px solid var(--ink); box-shadow: 10px 10px 0 rgba(34, 27, 22, .12); transform: rotate(1deg); }
.fact-slip::before { content: ""; position: absolute; width: 3.5rem; height: 1rem; left: 50%; top: -.55rem; transform: translateX(-50%) rotate(-2deg); background: rgba(243, 234, 220, .72); }
.fact-slip dl, .fact-slip dd { margin: 0; }
.fact-slip dl > div { display: grid; grid-template-columns: 4rem 1fr; gap: .75rem; padding: .85rem 0; border-top: 1px solid rgba(34, 27, 22, .35); }
.fact-slip dt { font: 700 .76rem/1.6 "Microsoft YaHei", "PingFang SC", sans-serif; }
.fact-slip dd { font-weight: 700; }

.section { padding: 5rem 0; border-bottom: 1px solid var(--line); }
.section-grid { display: grid; gap: 2.5rem; }
h2 { margin-bottom: 1.3rem; font-size: clamp(2rem, 9vw, 4.5rem); line-height: 1.08; letter-spacing: -.045em; }
.section-heading > p:last-child { max-width: 30rem; }
.service-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--ink); }
.service-list li { display: grid; grid-template-columns: 2.8rem 1fr; align-items: center; gap: .5rem; min-height: 4.6rem; padding: .75rem 0; border-bottom: 1px solid var(--line); font-size: clamp(1.05rem, 5vw, 1.45rem); font-weight: 700; }
.service-list span { color: var(--clay); font: 700 .72rem/1 "Microsoft YaHei", "PingFang SC", sans-serif; }

.crew { color: var(--paper); background-color: var(--ink); background-image: repeating-linear-gradient(98deg, transparent 0 60px, rgba(216, 183, 133, .045) 61px, transparent 63px); }
.crew__layout { display: grid; gap: 2rem; }
.crew__mark { display: flex; align-items: flex-start; color: var(--wood); font-size: clamp(5.5rem, 32vw, 12rem); font-weight: 900; line-height: .72; letter-spacing: -.2em; }
.crew__mark span:last-child { margin-top: .45em; }
.crew__copy .index { color: var(--wood); }
.crew__copy h2 { color: var(--paper); }
.crew__copy > p:last-child { max-width: 38rem; color: #dfd2c0; }
.crew__statement { padding-left: 1rem; border-left: 4px solid var(--clay); font-size: 1.12rem; }

.knowledge__head { display: grid; gap: 1rem; margin-bottom: 2.5rem; }
.knowledge__head > p { max-width: 30rem; }
.knowledge-list { border-top: 1px solid var(--ink); }
details { border-bottom: 1px solid var(--line); }
summary { min-height: 64px; display: grid; grid-template-columns: 2.7rem 1fr; align-items: center; gap: .5rem; padding: .7rem 2.2rem .7rem 0; cursor: pointer; font-weight: 700; list-style-position: outside; }
summary span { color: var(--clay); font: 700 .72rem/1 "Microsoft YaHei", "PingFang SC", sans-serif; }
.answer { max-width: 48rem; padding: 0 0 1rem 3.2rem; }
.answer p { margin-bottom: 0; }

.contact { background: var(--paper-deep); }
.contact__layout { display: grid; gap: 2.5rem; }
.contact-card { padding: 1.2rem; border: 1px solid var(--ink); background: var(--paper); font-style: normal; box-shadow: 10px 10px 0 var(--wood); }
.contact-card > div { display: grid; gap: .35rem; padding: 1rem 0; border-bottom: 1px solid var(--line); }
.contact-card span { font: 700 .72rem/1.3 "Microsoft YaHei", "PingFang SC", sans-serif; letter-spacing: .08em; }
.contact-card strong { font-size: 1.03rem; }
.contact-card .phone-link { width: 100%; margin-top: 1.2rem; }

footer { padding: 1.5rem 0; color: var(--paper); background: var(--ink); }
.footer__row { display: flex; flex-direction: column; gap: .3rem; }
.footer__row p { margin-bottom: 0; font: 700 .72rem/1.6 "Microsoft YaHei", "PingFang SC", sans-serif; letter-spacing: .05em; }

@media (min-width: 46rem) {
  :root { --wrap: min(70rem, calc(100% - 4rem)); }
  .masthead { position: sticky; top: 0; backdrop-filter: blur(10px); }
  .section-nav { position: absolute; inset: 0 11rem 0 auto; width: max-content; border-top: 0; }
  .section-nav a { height: 4rem; }
  .hero__grid { grid-template-columns: minmax(0, 1.55fr) minmax(18rem, .65fr); align-items: end; }
  .hero__actions { max-width: 35rem; flex-direction: row; align-items: center; }
  .hero__actions .phone-link { min-width: 20rem; }
  .text-link { flex: 1; }
  .section-grid { grid-template-columns: minmax(16rem, .75fr) minmax(20rem, 1fr); gap: 6rem; }
  .crew__layout { grid-template-columns: minmax(15rem, .75fr) minmax(20rem, 1fr); align-items: center; }
  .knowledge__head { grid-template-columns: 1fr 25rem; align-items: end; }
  .contact__layout { grid-template-columns: 1fr minmax(24rem, .8fr); align-items: start; }
  .footer__row { flex-direction: row; justify-content: space-between; }
}

@media (hover: hover) {
  .section-nav a:hover, .text-link:hover { color: var(--clay); }
  .phone-link:hover { color: var(--ink); background: var(--wood); border-color: var(--ink); }
  summary:hover { color: var(--clay); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}

@media print {
  :root { --paper: #fff; --ink: #000; }
  body { background: #fff; color: #000; font-size: 10pt; }
  .masthead, .hero__actions, .section-nav, .skip-link { display: none; }
  .hero, .section { min-height: 0; padding: 1.25rem 0; break-inside: avoid; }
  .crew { color: #000; background: #fff; }
  .crew__copy h2, .crew__copy > p:last-child { color: #000; }
  details { break-inside: avoid; }
  details > * { display: block; }
  .contact-card { box-shadow: none; }
}