:root {
  color-scheme: light;
  --ink: #25211d;
  --muted: #6d665e;
  --paper: #f5efdf;
  --paper-light: #fbf7ec;
  --red: #a9362a;
  --red-dark: #7f261f;
  --green: #315a4c;
  --line: rgba(37, 33, 29, 0.2);
  --line-soft: rgba(37, 33, 29, 0.1);
  --radius: 18px;
  font-family: "Noto Serif SC", "Songti SC", SimSun, serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
section[id] { scroll-margin-top: 90px; }

body {
  margin: 0;
  color: var(--ink);
  background:
    repeating-linear-gradient(0deg, transparent 0, transparent 31px, rgba(37, 33, 29, 0.025) 32px),
    var(--paper);
  -webkit-font-smoothing: antialiased;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  max-width: 1180px;
  margin: 0 auto;
  padding: 16px 24px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: rgba(245, 239, 223, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.brand { display: inline-flex; align-items: center; gap: 11px; font-size: 20px; font-weight: 800; letter-spacing: 0.08em; }

.brand-mark {
  position: relative;
  display: block;
  width: 36px;
  height: 36px;
  border-radius: 55% 45% 58% 42%;
  background: var(--red);
  transform: rotate(-18deg);
}

.brand-mark::after {
  content: "";
  position: absolute;
  top: 7px;
  left: 16px;
  width: 4px;
  height: 22px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.62);
  transform: rotate(24deg);
}

.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links a { color: var(--muted); font-family: "Microsoft YaHei", sans-serif; font-size: 13px; font-weight: 650; }
.nav-links a:hover { color: var(--red); }

main { max-width: 1180px; margin: 0 auto; padding: 0 24px 76px; }

.hero { padding: 42px 0 58px; }

.hero-kicker {
  display: flex;
  padding: 10px 14px;
  justify-content: space-between;
  gap: 16px;
  color: var(--paper-light);
  background: var(--ink);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 11px;
  letter-spacing: 0.12em;
}

.hero-grid { display: grid; grid-template-columns: 1.25fr 0.75fr; border: 1px solid var(--ink); border-top: 0; }

.hero-copy {
  display: flex;
  min-height: 570px;
  padding: 64px 60px;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  border-right: 1px solid var(--ink);
  background: rgba(251, 247, 236, 0.58);
}

.eyebrow { margin: 0 0 16px; color: var(--red); font-family: "Microsoft YaHei", sans-serif; font-size: 11px; font-weight: 800; letter-spacing: 0.2em; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 28px; font-size: clamp(48px, 5.7vw, 72px); line-height: 1.16; letter-spacing: 0.01em; }
h2 { margin-bottom: 16px; font-size: clamp(32px, 4vw, 44px); line-height: 1.24; }
h3 { margin-bottom: 12px; font-size: 20px; line-height: 1.4; }

.lead { max-width: 650px; margin-bottom: 34px; color: var(--muted); font-size: 17px; line-height: 2; }

.primary-button {
  display: inline-flex;
  min-height: 46px;
  padding: 0 20px;
  align-items: center;
  gap: 16px;
  color: #fff;
  background: var(--red);
  border-radius: 2px;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 13px;
  font-weight: 700;
  transition: transform 160ms ease, background 160ms ease;
}

.primary-button:hover { transform: translateY(-2px); background: var(--red-dark); }

.brief-card { display: flex; min-height: 570px; padding: 34px; flex-direction: column; background: var(--red); color: #fff; }
.brief-head { display: grid; gap: 7px; padding-bottom: 24px; border-bottom: 1px solid rgba(255,255,255,.28); }
.brief-head span, .brief-head small { font-family: "Microsoft YaHei", sans-serif; letter-spacing: .14em; }
.brief-head span { font-size: 10px; }
.brief-head strong { font-size: 30px; }
.brief-head small { color: rgba(255,255,255,.7); font-size: 11px; }

.chart { display: flex; height: 250px; padding: 32px 0 22px; align-items: flex-end; justify-content: space-between; gap: 9px; border-bottom: 1px solid rgba(255,255,255,.28); }
.chart span { width: 100%; height: var(--bar); background: var(--paper-light); opacity: .88; transform-origin: bottom; animation: rise 720ms ease-out both; }
.chart span:nth-child(2) { animation-delay: 60ms; }
.chart span:nth-child(3) { animation-delay: 120ms; }
.chart span:nth-child(4) { animation-delay: 180ms; }
.chart span:nth-child(5) { animation-delay: 240ms; }
.chart span:nth-child(6) { animation-delay: 300ms; }
.chart span:nth-child(7) { animation-delay: 360ms; }
@keyframes rise { from { transform: scaleY(0); } to { transform: scaleY(1); } }

.brief-meta { display: grid; grid-template-columns: repeat(3, 1fr); margin: auto 0 0; }
.brief-meta div { padding: 20px 10px 0; border-right: 1px solid rgba(255,255,255,.22); }
.brief-meta div:first-child { padding-left: 0; }
.brief-meta div:last-child { border-right: 0; }
.brief-meta dt { margin-bottom: 7px; color: rgba(255,255,255,.62); font-family: "Microsoft YaHei", sans-serif; font-size: 10px; }
.brief-meta dd { margin: 0; font-size: 14px; }

.section { padding: 92px 0; border-top: 1px solid var(--line); }
.about-section { display: grid; grid-template-columns: 80px .65fr 1.35fr; gap: 40px; align-items: start; }
.section-index { color: var(--red); font-size: 13px; font-weight: 800; }
.section-copy { padding-left: 36px; border-left: 1px solid var(--red); }
.section-copy p { color: var(--muted); font-size: 17px; line-height: 2; }
.section-copy p:last-child { margin-bottom: 0; }

.section-topline { display: flex; margin-bottom: 42px; align-items: end; justify-content: space-between; gap: 40px; }
.section-topline > p { max-width: 430px; color: var(--muted); line-height: 1.8; }

.service-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 2px solid var(--ink); border-bottom: 1px solid var(--ink); }
.service-grid article { min-height: 260px; padding: 30px 26px; border-right: 1px solid var(--line); background: rgba(251,247,236,.3); }
.service-grid article:last-child { border-right: 0; }
.service-grid span { display: block; margin-bottom: 48px; color: var(--red); font-family: "Microsoft YaHei", sans-serif; font-size: 11px; font-weight: 800; }
.service-grid p { margin-bottom: 0; color: var(--muted); line-height: 1.85; }

.source-section { display: grid; grid-template-columns: .9fr 1.1fr; gap: 80px; }
.source-statement { padding: 42px; color: var(--paper-light); background: var(--green); }
.source-statement .eyebrow { color: #e4b56e; }
.source-statement p:last-child { margin-bottom: 0; color: rgba(255,255,255,.7); line-height: 1.95; }
.source-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--ink); }
.source-list li { display: grid; grid-template-columns: 110px 1fr; gap: 24px; padding: 28px 0; border-bottom: 1px solid var(--line); }
.source-list span { color: var(--red); font-weight: 800; }
.source-list p { margin: 0; color: var(--muted); line-height: 1.8; }

.contact-section { display: grid; grid-template-columns: .75fr 1.25fr; gap: 70px; }
.contact-intro { max-width: 360px; color: var(--muted); line-height: 1.85; }
.contact-list { margin: 0; border-top: 2px solid var(--ink); }
.contact-list div { display: grid; grid-template-columns: 100px 1fr; gap: 18px; padding: 17px 0; border-bottom: 1px solid var(--line); }
.contact-list dt { color: var(--muted); font-family: "Microsoft YaHei", sans-serif; font-size: 12px; }
.contact-list dd { margin: 0; line-height: 1.7; }
.contact-list a { color: var(--red-dark); font-weight: 800; }

.site-footer { border-top: 1px solid var(--ink); background: #e8dfcd; }
.footer-inner { display: flex; max-width: 1180px; margin: 0 auto; padding: 24px; align-items: center; justify-content: space-between; gap: 18px; color: var(--muted); font-family: "Microsoft YaHei", sans-serif; font-size: 12px; }
.beian { display: flex; flex-wrap: wrap; gap: 18px; }
.beian a:hover { color: var(--red); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .chart span { animation: none; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}

@media (max-width: 960px) {
  .nav-links { display: none; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy { border-right: 0; border-bottom: 1px solid var(--ink); }
  .brief-card { min-height: 500px; }
  .about-section { grid-template-columns: 50px 1fr; }
  .section-copy { grid-column: 2; }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .service-grid article:nth-child(2) { border-right: 0; }
  .service-grid article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
}

@media (max-width: 680px) {
  .site-header, main, .footer-inner { padding-right: 18px; padding-left: 18px; }
  .hero { padding-top: 24px; }
  .hero-kicker { align-items: flex-start; flex-direction: column; }
  .hero-copy { min-height: 0; padding: 48px 26px; }
  h1 { font-size: clamp(40px, 12vw, 56px); }
  .lead { font-size: 15px; }
  .brief-card { min-height: 440px; padding: 28px 24px; }
  .chart { height: 190px; }
  .section { padding: 68px 0; }
  .about-section, .source-section, .contact-section { grid-template-columns: 1fr; gap: 30px; }
  .section-index { display: none; }
  .section-copy { grid-column: auto; padding-left: 20px; }
  .section-topline { align-items: flex-start; flex-direction: column; }
  .service-grid { grid-template-columns: 1fr; }
  .service-grid article { min-height: 215px; border-right: 0; border-bottom: 1px solid var(--line); }
  .service-grid article:last-child { border-bottom: 0; }
  .service-grid span { margin-bottom: 28px; }
  .source-statement { padding: 32px 24px; }
  .source-list li { grid-template-columns: 90px 1fr; }
  .contact-list div { grid-template-columns: 82px 1fr; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
}