:root {
  --bg: #faf7f0;
  --panel: #f2ecdf;
  --ink: #211c13;
  --sub: #716a59;
  --brand: #b08a3e;
  --brand-strong: #8a6a26;
  --line: #e3dcc9;
  --line-strong: #cfc4a8;
  --dark: #16130e;
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --wrap: 1200px;
  --radius: 2px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.75 var(--sans);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
.wrap { width: min(100% - 48px, var(--wrap)); margin: 0 auto; }
::selection { background: var(--brand); color: #fff; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .3s;
}
.site-header.scrolled { box-shadow: 0 6px 24px rgba(40, 32, 14, .08); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.brand { display: flex; align-items: baseline; gap: 12px; }
.brand-logo { height: 26px; width: auto; align-self: center; mix-blend-mode: multiply; }
.brand-name { font-family: var(--serif); font-size: 17px; letter-spacing: .08em; }
.brand-name i { font-style: normal; font-family: var(--sans); font-size: 11px; letter-spacing: .18em; color: var(--sub); margin-left: 8px; }
.nav { display: flex; gap: 34px; font-size: 14px; letter-spacing: .12em; }
.nav a { position: relative; padding: 8px 0; color: var(--ink); }
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 1px;
  background: var(--ink); transition: width .3s;
}
.nav a:hover::after { width: 100%; }
.nav-toggle { display: none; font-size: 22px; background: none; border: 0; cursor: pointer; color: var(--ink); }

/* ---------- 区块骨架 ---------- */
.section { padding: 96px 0; scroll-margin-top: 76px; border-top: 1px solid var(--line); }
.sec-head { border-bottom: 1px solid var(--line-strong); padding-bottom: 26px; margin-bottom: 48px; }
/* 金色色块：替代原演示稿中的金色装饰条切片，纯 CSS 实现 */
.sec-head h2 { position: relative; padding-top: 24px; }
.sec-head h2::before { content: ""; position: absolute; top: 0; left: 0; width: 64px; height: 8px; background: var(--brand); }
.eyebrow {
  color: var(--brand-strong); letter-spacing: .3em; font-size: 12px;
  text-transform: uppercase; margin: 0 0 14px;
}
.eyebrow.light { color: #e6cd96; }
h1, h2, h3, h4 { margin: 0; line-height: 1.3; }
h2 { font-family: var(--serif); font-weight: 600; font-size: clamp(30px, 3.6vw, 42px); letter-spacing: .04em; }
h3.sub-title {
  font-family: var(--serif); font-weight: 600; font-size: 22px; letter-spacing: .06em;
  margin: 64px 0 28px; display: flex; align-items: center; gap: 18px;
}
h3.sub-title::after { content: ""; flex: 1; border-top: 1px solid var(--line); }
.lead { color: var(--sub); font-size: 16px; margin: 0 0 16px; max-width: 640px; }

.grid { display: grid; gap: 32px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }

/* ---------- 关于 ---------- */
.about-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; }
.about-grid .lead { font-family: var(--serif); font-size: 21px; line-height: 1.9; color: var(--ink); max-width: none; margin: 0; }
.about-grid p:not(.lead) { color: var(--sub); margin: 0; padding-top: 10px; border-top: 1px solid var(--line-strong); }

/* ---------- 文字栏目（实力 / 愿景，无卡片） ---------- */
.col-item { border-top: 2px solid var(--ink); padding-top: 20px; }
.col-item .idx { display: block; font-size: 12px; letter-spacing: .24em; color: var(--brand-strong); margin-bottom: 14px; }
.col-item h4, .col-item b { display: block; font-family: var(--serif); font-weight: 600; font-size: 19px; letter-spacing: .04em; margin-bottom: 10px; }
.col-item p, .col-item span { color: var(--sub); font-size: 14.5px; margin: 0; }

/* ---------- 图片条目（场地 / 案例，无卡片） ---------- */
.vcard { cursor: pointer; }
.vcard-media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: var(--panel); }
.vcard-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s; }
.vcard:hover .vcard-media img { transform: scale(1.05); }
.vcard-media::after {
  content: "查看相册"; position: absolute; right: 12px; bottom: 12px;
  background: rgba(22, 19, 14, .78); color: #f3ecdb; font-size: 12px; letter-spacing: .14em;
  padding: 6px 12px; opacity: 0; transition: opacity .3s;
}
.vcard:hover .vcard-media::after { opacity: 1; }
.vcard-body { margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--line-strong); }
.vcard-body h4 { font-family: var(--serif); font-weight: 600; font-size: 17px; letter-spacing: .04em; margin-bottom: 6px; }
.vcard-body p { color: var(--sub); font-size: 14px; margin: 0; }

/* ---------- 品牌墙 ---------- */
.brandwall {
  margin-top: 56px; padding-top: 26px; border-top: 1px solid var(--line);
  color: var(--sub); font-size: 14px; letter-spacing: .1em; text-align: left;
}

/* ---------- 承诺 ---------- */
.feature-list { list-style: none; padding: 0; margin: 0; }
.feature-list li { padding: 22px 0; border-top: 1px solid var(--line-strong); }
.feature-list li:last-child { border-bottom: 1px solid var(--line-strong); }
.feature-list b { display: block; font-family: var(--serif); font-weight: 600; font-size: 18px; letter-spacing: .04em; margin-bottom: 6px; }
.feature-list span { color: var(--sub); font-size: 14.5px; }
.shot { position: relative; overflow: hidden; cursor: pointer; margin: 0; }
.shot img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; transition: transform .6s; }
.shot:hover img { transform: scale(1.04); }

/* ---------- Hero ---------- */
.hero { position: relative; min-height: 92vh; display: flex; align-items: center; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background-size: cover; background-position: center; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(95deg, rgba(16, 13, 9, .84) 0%, rgba(16, 13, 9, .52) 52%, rgba(16, 13, 9, .18) 100%);
}
.hero-inner { position: relative; z-index: 2; color: #fff; padding: 120px 0 80px; margin: 0 auto; text-align: center; }
.hero h1 {
  font-family: var(--serif); font-weight: 600; letter-spacing: .04em;
  font-size: clamp(20px, 5.6vw, 64px); margin: 14px 0 24px;
  white-space: nowrap; /* 主标题限制一行，字号随视口缩放 */
}
.hero-sub { color: rgba(255, 255, 255, .88); font-size: 18px; max-width: 560px; margin: 0 auto; }
.hero-actions { display: flex; gap: 16px; margin-top: 40px; justify-content: center; }

.btn {
  display: inline-block; padding: 15px 36px; border-radius: var(--radius);
  font-size: 15px; letter-spacing: .08em;
  transition: background .3s, color .3s, border-color .3s;
}
.btn-primary { background: var(--brand); color: #1e1a12; }
.btn-primary:hover { background: var(--brand-strong); color: #fff; }
.btn-ghost { border: 1px solid rgba(255, 255, 255, .65); color: #fff; }
.btn-ghost:hover { background: #fff; border-color: #fff; color: var(--ink); }

/* ---------- 数据条 ---------- */
.stats { background: var(--dark); color: #fff; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); padding: 60px 0; }
.stat { padding-left: 28px; border-left: 1px solid rgba(255, 255, 255, .14); }
.stat:first-child { border-left: 0; padding-left: 0; }
.stat b { font-family: var(--serif); font-weight: 600; font-size: clamp(34px, 3.8vw, 48px); color: var(--brand); letter-spacing: .02em; }
.stat b span { font-size: .45em; margin-left: 6px; }
.stat > span { display: block; color: rgba(255, 255, 255, .55); font-size: 13px; letter-spacing: .14em; margin-top: 8px; }

/* ---------- 联系 ---------- */
.contact { background: var(--panel); text-align: center; border-top: 1px solid var(--line); }
.contact-inner { max-width: 640px; margin: 0 auto; }
.contact-logo { height: 34px; width: auto; margin: 0 auto 28px; mix-blend-mode: multiply; }
.contact h2 { margin-bottom: 18px; }
.contact .lead { margin: 0 auto 36px; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--dark); padding: 44px 0; }
.footer-inner { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; color: rgba(250, 247, 240, .5); font-size: 13px; letter-spacing: .06em; }
.beian { color: inherit; text-decoration: none; }
.beian:hover { color: rgba(250, 247, 240, .85); }

/* ---------- 灯箱 ---------- */
.lightbox { position: fixed; inset: 0; z-index: 100; display: none; align-items: center; justify-content: center; background: rgba(16, 13, 9, .94); }
.lightbox.show { display: flex; }
.lb-img { max-width: 88vw; max-height: 84vh; }
.lb-close, .lb-prev, .lb-next {
  position: absolute; background: rgba(255, 255, 255, .12); color: #fff; border: 0; cursor: pointer;
  width: 48px; height: 48px; font-size: 24px; line-height: 1; transition: background .25s;
}
.lb-close:hover, .lb-prev:hover, .lb-next:hover { background: rgba(255, 255, 255, .28); }
.lb-close { top: 24px; right: 24px; }
.lb-prev { left: 24px; top: 50%; transform: translateY(-50%); }
.lb-next { right: 24px; top: 50%; transform: translateY(-50%); }
.lb-count { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); color: rgba(255, 255, 255, .65); font-size: 13px; letter-spacing: .16em; }

/* ---------- 滚动浮现 ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 1000px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 44px; }
  .about-grid { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 760px) {
  .nav {
    position: fixed; inset: 76px 0 auto 0; flex-direction: column; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--line);
    padding: 8px 0; transform: translateY(-140%); transition: transform .35s;
  }
  .nav.open { transform: none; }
  .nav a { padding: 14px 24px; }
  .nav-toggle { display: block; }
  .section { padding: 72px 0; }
  .sec-head { margin-bottom: 36px; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 36px 0; }
  .stat:nth-child(3) { border-left: 0; padding-left: 0; }
  .hero { min-height: 86vh; }
  .hero-inner { padding: 100px 0 64px; }
  .hero-actions { flex-wrap: wrap; }
  .footer-inner { flex-direction: column; gap: 6px; }
}
@media (max-width: 420px) {
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .vcard-body p { display: none; }
}