:root {
  color-scheme: light;
  --bg: #faf7f1;
  --panel: #fffdf8;
  --ink: #24211e;
  --muted: #6f6860;
  --line: #ded4c7;
  --accent: #c4482d;
  --accent-2: #e6a53a;
  --soft: #f3eadb;
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); line-height: 1.7; }
a { color: inherit; }
img { max-width: 100%; display: block; }
.site-header { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 14px clamp(18px, 4vw, 56px); background: rgba(250, 247, 241, .96); border-bottom: 1px solid var(--line); backdrop-filter: blur(10px); }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; min-width: 220px; }
.brand-mark { width: 34px; height: 34px; border-radius: 50%; background: radial-gradient(circle at 35% 30%, #ffd87a 0 18%, #d64d32 19% 52%, #2e2a26 53% 100%); box-shadow: inset 0 0 0 2px #fff4d8; }
.brand strong, .brand small { display: block; }
.brand small { color: var(--muted); font-size: 12px; line-height: 1.3; }
.site-nav { display: flex; align-items: center; justify-content: flex-end; gap: 6px; flex-wrap: wrap; }
.site-nav a { text-decoration: none; padding: 8px 10px; border-radius: 8px; color: var(--muted); font-size: 14px; }
.site-nav a.active, .site-nav a:hover { background: var(--soft); color: var(--ink); }
.site-nav a:focus-visible, .button:focus-visible, .filters input:focus-visible, .filters select:focus-visible { outline: 3px solid rgba(196, 72, 45, .32); outline-offset: 2px; }
.site-nav a.secondary { color: var(--accent); }
.site-nav a.icon-link { width: 42px; height: 42px; padding: 0; display: inline-flex; align-items: center; justify-content: center; }
.site-nav a.icon-link svg { width: 21px; height: 21px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; }
.site-nav a.icon-link span { display: none; }
.menu-button { display: none; border: 1px solid var(--line); background: var(--panel); border-radius: 8px; padding: 8px 12px; }
.hero { min-height: calc(100vh - 72px); display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(280px, .8fr); align-items: center; gap: clamp(28px, 5vw, 72px); padding: clamp(48px, 8vw, 96px) clamp(18px, 7vw, 96px); border-bottom: 1px solid var(--line); }
.hero h1, .page-title h1 { font-size: clamp(36px, 6vw, 72px); line-height: 1.08; letter-spacing: 0; margin: 0 0 24px; }
.lead { max-width: 760px; color: #3e3832; font-size: clamp(18px, 2vw, 22px); }
.eyebrow { color: var(--accent); font-weight: 700; letter-spacing: 0; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.button { display: inline-flex; align-items: center; min-height: 42px; padding: 9px 16px; border-radius: 8px; border: 1px solid #2e2a26; background: #2e2a26; color: #fff; text-decoration: none; font-weight: 700; }
.button.ghost { background: transparent; color: var(--ink); }
.text-link { color: var(--accent); font-weight: 700; text-decoration: none; }
.hero-panel { display: grid; gap: 12px; padding: 24px; border: 1px solid var(--line); background: linear-gradient(145deg, #fffdf8, #f4ead8); border-radius: 8px; }
.hero-panel span, .hero-panel strong, .flow span { display: block; padding: 18px; border: 1px solid var(--line); border-radius: 8px; background: rgba(255,255,255,.62); font-weight: 700; }
.hero-panel strong { background: #2e2a26; color: #fff; }
.section, .page-title { padding: clamp(36px, 6vw, 72px) clamp(18px, 7vw, 96px); }
.section > * { max-width: 1180px; }
.section > .card-grid, .section > .timeline, .section > .detail-grid, .section > .image-grid, .section > .flow, .section > .split, .section > .detail-card { max-width: none; }
.page-title { background: var(--panel); border-bottom: 1px solid var(--line); }
.page-title p, .section-lead { max-width: 820px; color: var(--muted); font-size: 18px; }
.breadcrumbs { color: var(--muted); font-size: 14px; margin-bottom: 22px; display: flex; gap: 8px; flex-wrap: wrap; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 18px; }
h2 { font-size: clamp(26px, 3vw, 38px); line-height: 1.2; margin: 0 0 16px; }
h3 { margin: 0 0 10px; line-height: 1.35; }
p { margin: 0 0 14px; }
.muted { color: var(--muted); }
.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.phase-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.phase-card { padding: 18px; }
.phase-card h2 { font-size: clamp(24px, 2.2vw, 32px); }
.project-grid .project:last-child:nth-child(3n + 1) { grid-column: 1 / -1; }
.card, .line-card, .detail-card, .timeline-item { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 20px; }
.card.compact { min-height: 88px; display: flex; align-items: center; }
.split { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.line-card { margin-bottom: 14px; }
.badge { display: inline-flex; align-items: center; min-height: 26px; padding: 3px 9px; margin: 0 4px 8px 0; border-radius: 999px; background: #f2dfbc; color: #5f3416; font-size: 13px; font-weight: 700; }
.clean-list { margin: 0; padding-left: 20px; }
.clean-list li { margin: 7px 0; }
.detail-card { margin-bottom: 18px; }
.detail-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 18px; }
.flow { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 12px; }
.flow.long { grid-template-columns: repeat(7, minmax(120px, 1fr)); }
.timeline { display: grid; gap: 14px; }
.timeline-item time { color: var(--accent); font-weight: 700; }
dl { display: grid; grid-template-columns: 92px 1fr; gap: 6px 12px; margin: 14px 0 0; }
dt { color: var(--muted); }
dd { margin: 0; }
.filters { display: flex; justify-content: space-between; gap: 16px; align-items: center; padding-bottom: 0; flex-wrap: wrap; }
.filters.multi { align-items: stretch; }
.filters input, .filters select { flex: 1 1 180px; min-height: 44px; border: 1px solid var(--line); border-radius: 8px; padding: 0 14px; background: var(--panel); color: var(--ink); font: inherit; }
.filters input { flex-basis: 280px; }
.filters button { min-height: 36px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); margin: 4px; padding: 6px 12px; cursor: pointer; }
.filters button.active { background: #2e2a26; color: #fff; border-color: #2e2a26; }
.empty { border: 1px dashed var(--line); border-radius: 8px; padding: 28px; text-align: center; color: var(--muted); }
.tag-row { display: flex; flex-wrap: wrap; gap: 2px; }
.article-body { max-width: 880px; margin: 0 auto; }
.article-body h2 { margin-top: 28px; }
.image-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin: 18px 0 28px; }
.image-frame { margin: 0; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; background: var(--panel); }
.image-frame img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; background: var(--soft); }
.image-frame figcaption { display: flex; justify-content: space-between; gap: 12px; padding: 12px 14px; color: var(--muted); flex-wrap: wrap; }
.capability-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; align-items: stretch; }
.capability-card:last-child:nth-child(3n + 1) { grid-column: 1 / -1; }
.capability-card, .method-card, .contact-box { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 18px; }
.method-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.method-card h2 { font-size: 24px; }
.method-card h4 { margin: 18px 0 8px; }
.step-list { margin: 0 0 14px; padding-left: 22px; }
.step-list li { margin: 6px 0; }
.split.mini { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; padding: 0; }
.contact-box { display: grid; grid-template-columns: minmax(220px, 320px) minmax(0, 1fr); gap: clamp(20px, 4vw, 42px); align-items: start; max-width: none; }
.contact-box.compact-contact { display: block; max-width: none; padding: 0; border: 0; background: transparent; }
.contact-box.compact-contact p { margin-bottom: 6px; }
.contact-qr { margin: 0; display: grid; justify-items: center; gap: 12px; padding: 14px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.contact-qr img { width: 100%; background: #fff; }
.contact-qr .wechat-profile { max-width: 180px; justify-self: start; }
.contact-qr .wechat-code { max-width: 260px; }
.contact-qr figcaption { color: var(--ink); font-size: 16px; font-weight: 700; line-height: 1.2; text-align: center; }
.copy-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.copy-row span { min-width: 0; }
.copy-button { min-height: 34px; padding: 5px 12px; border: 1px solid #2e2a26; border-radius: 8px; background: #2e2a26; color: #fff; font: inherit; font-weight: 700; cursor: pointer; }
.copy-button:focus-visible { outline: 3px solid rgba(196, 72, 45, .32); outline-offset: 2px; }
.search-result[hidden], .project[hidden], .timeline-item[hidden] { display: none; }
.cta-band { margin: clamp(24px, 5vw, 64px) clamp(18px, 7vw, 96px); padding: clamp(28px, 5vw, 56px); border-radius: 8px; background: #352f2a; color: #fff; }
.cta-band p { color: #f4ead8; max-width: 760px; }
.site-footer { display: grid; grid-template-columns: 1.3fr 1.1fr .9fr; gap: 24px; padding: 36px clamp(18px, 7vw, 96px); border-top: 1px solid var(--line); background: #efe5d8; }
.footer-contact h3 { margin-bottom: 8px; }
.copyright { grid-column: 1 / -1; color: var(--muted); border-top: 1px solid var(--line); padding-top: 18px; }
.back-top { position: fixed; right: 18px; bottom: 18px; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 50%; background: var(--panel); cursor: pointer; }
[hidden] { display: none !important; }
@media (max-width: 900px) {
  .site-header { align-items: flex-start; }
  .menu-button { display: inline-flex; }
  .site-nav { display: none; position: absolute; left: 18px; right: 18px; top: 68px; background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 12px; justify-content: flex-start; }
  .site-nav.open { display: flex; }
  .hero, .split, .site-footer { grid-template-columns: 1fr; }
  .card-grid, .detail-grid, .flow, .flow.long, .image-grid, .capability-list, .method-grid, .split.mini, .contact-box { grid-template-columns: 1fr; }
  .project-grid .project:last-child:nth-child(3n + 1), .capability-card:last-child:nth-child(3n + 1) { grid-column: auto; }
  .hero { min-height: auto; }
  .brand small { display: none; }
  dl { grid-template-columns: 1fr; }
  .filters, .filters.multi { display: grid; grid-template-columns: 1fr; }
  .site-nav a { width: 100%; }
  .site-nav a.icon-link { width: 100%; justify-content: flex-start; padding: 8px 10px; height: auto; gap: 8px; }
  .site-nav a.icon-link span { display: inline; }
}