@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700&family=Noto+Serif+SC:wght@400;500&family=Radio+Canada+Big:wght@500;600&family=Source+Serif+4:wght@400;500&family=Geist+Mono:wght@400;500&display=swap');

:root {
  --ink-950: #12110f;
  --ink-900: #121119;
  --paper: #f4f0e9;
  --bg-soft: #f6f8fb;
  --white: #ffffff;
  --black: #000000;
  --copper: #b6734e;
  --olive: #66640f;
  --border-subtle: #d9d2c8;
  --text-muted: #746b62;
  --text-on-dark-muted: #b2aba1;

  --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-serif: 'Noto Serif SC', 'Source Serif 4', 'Source Serif Pro', 'Songti SC', serif;
  --font-display: 'Radio Canada Big', 'Noto Sans SC', sans-serif;
  --font-mono: 'Geist Mono', 'JetBrains Mono', ui-monospace, Menlo, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--paper);
  color: var(--ink-950);
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }

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

ul { list-style: none; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

/* ---------- Navigation ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  padding: 0 28px;
  background: rgba(244, 240, 233, 0.86);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
}
.nav .logo {
  display: flex;
  align-items: center;
  color: var(--ink-950);
}
.nav .logo svg { width: 56px; height: 56px; fill: currentColor; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
}
.nav-links a {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 15px;
  color: var(--ink-950);
  opacity: 0.86;
  transition: opacity .2s;
}
.nav-links a:hover,
.nav-links a[aria-current="page"] { opacity: 1; color: var(--copper); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 22px;
  background: var(--copper);
  color: #fffdf7;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 14px;
  border: none;
  cursor: pointer;
  letter-spacing: 0.01em;
}
.btn .bullet { width: 4px; height: 4px; background: #fff; border-radius: 1px; flex: none; }
.btn:hover { background: #a3653f; }

/* ---------- Hero (Home) ---------- */
.hero {
  background: var(--ink-950);
  color: var(--paper);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  padding: 130px 24px;
  text-align: center;
}
.hero .mark { width: clamp(160px, 22vw, 280px); height: auto; fill: var(--paper); }
.hero .eyebrow {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.32em;
  color: var(--paper);
}
.hero .rule { width: 64px; height: 2px; background: var(--copper); }
.hero h1 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(28px, 4vw, 36px);
}
.hero .tagline {
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.6vw, 18px);
  letter-spacing: 0.12em;
  color: var(--copper);
}

/* ---------- Four directions ---------- */
.directions {
  background: var(--paper);
  padding: 100px 24px 110px;
}
.directions h2 {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: clamp(26px, 3.2vw, 42px);
  max-width: 1200px;
  margin: 0 auto 56px;
}
.directions-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
}
.direction-card {
  border: 1px solid var(--border-subtle);
  padding: 24px;
  min-height: 260px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: border-color .2s, transform .2s;
}
.direction-card:hover { border-color: var(--copper); transform: translateY(-3px); }
.direction-card .num { font-family: var(--font-mono); font-size: 12px; color: var(--copper); }
.direction-card .en { font-family: var(--font-display); font-weight: 500; font-size: 28px; }
.direction-card .cn { font-family: var(--font-serif); font-size: 19px; color: var(--copper); }
.direction-card p { font-family: var(--font-serif); font-size: 16px; opacity: 0.7; }

/* ---------- Featured article ---------- */
.featured {
  background: var(--paper);
  padding: 80px 24px;
  display: flex;
  justify-content: center;
}
.featured-inner {
  max-width: 1200px;
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 56px;
  align-items: center;
}
.featured-inner img { width: 100%; aspect-ratio: 560/454; object-fit: cover; border-radius: 2px; }
.featured-copy .kicker {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--copper);
  margin-bottom: 18px;
  display: block;
}
.featured-copy h3 {
  font-family: 'Noto Sans SC', sans-serif;
  font-weight: 700;
  font-size: clamp(30px, 4vw, 48px);
  color: var(--ink-900);
  margin-bottom: 18px;
}
.featured-copy p {
  font-family: var(--font-sans);
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1.5;
  max-width: 460px;
  margin-bottom: 28px;
}
.featured-copy .rule { width: 52px; height: 1px; background: var(--copper); margin-bottom: 22px; }
.featured-copy .read-link { font-family: var(--font-sans); font-weight: 500; font-size: 16px; color: var(--ink-900); }

/* ---------- Bofan intro (dark) ---------- */
.intro-dark {
  background: var(--ink-950);
  color: var(--paper);
  padding: 90px 24px;
  display: flex;
  justify-content: center;
}
.intro-dark-inner {
  max-width: 1200px;
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 420px) minmax(0, 1fr);
  gap: 56px;
  align-items: center;
}
.intro-dark-inner img { width: 100%; aspect-ratio: 420/560; object-fit: cover; border-radius: 2px; }
.intro-dark-copy .kicker {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--copper);
  margin-bottom: 18px;
  display: block;
}
.intro-dark-copy h3 {
  font-family: 'Noto Sans SC', sans-serif;
  font-weight: 700;
  font-size: clamp(26px, 3.4vw, 42px);
  line-height: 1.35;
  margin-bottom: 24px;
}
.intro-dark-copy p {
  font-family: var(--font-sans);
  font-size: 17px;
  color: var(--text-on-dark-muted);
  line-height: 1.5;
  margin-bottom: 28px;
  max-width: 460px;
}
.intro-dark-copy .read-link { font-family: var(--font-sans); font-weight: 500; font-size: 16px; }

/* ---------- Service header (Body/Visual/Growth/Voice) ---------- */
.service-header {
  background: var(--ink-950);
  color: var(--paper);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 100px 24px;
  text-align: center;
}
.service-header .kicker { font-family: var(--font-mono); font-size: 14px; letter-spacing: 0.1em; color: var(--copper); }
.service-header h1 { font-family: var(--font-display); font-weight: 500; font-size: clamp(32px, 5vw, 56px); }
.service-header p { font-family: var(--font-serif); font-size: 20px; max-width: 560px; }

/* ---------- Intro section (About) ---------- */
.about-intro { display: flex; justify-content: center; }
.about-intro-inner {
  max-width: 1300px;
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 16px;
  align-items: stretch;
}
.about-intro-inner img { width: 100%; height: 100%; min-height: 480px; object-fit: cover; }
.about-intro-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 40px;
  padding: 56px 64px;
}
.about-intro-copy .kicker { font-family: var(--font-serif); font-size: 18px; color: var(--text-muted); }
.about-intro-copy h1 {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: clamp(28px, 3.4vw, 38px);
  line-height: 1.3;
  max-width: 500px;
}

/* ---------- Values section ---------- */
.values {
  padding: 100px 24px 130px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 40px;
}
.values h2 {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: clamp(26px, 3vw, 38px);
  text-align: center;
}
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 1200px;
  width: 100%;
}
.value-card {
  background: var(--white);
  border-radius: 16px;
  padding: 36px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-height: 230px;
}
.value-card.on-paper { background: var(--paper); }
.value-card svg { width: 38px; height: 38px; stroke: var(--copper); fill: none; stroke-width: 1.6; }
.value-card h3 { font-family: var(--font-sans); font-weight: 500; font-size: 19px; }
.value-card p { font-family: var(--font-serif); font-size: 16px; opacity: 0.75; line-height: 1.4; }

/* ---------- Founder story ---------- */
.founder { display: flex; justify-content: center; padding: 0 24px 110px; }
.founder-inner {
  max-width: 1300px;
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 16px;
  align-items: center;
}
.founder-inner img { width: 100%; aspect-ratio: 612/700; object-fit: cover; }
.founder-copy { display: flex; flex-direction: column; gap: 28px; padding: 0 64px; }
.founder-copy .kicker { font-family: var(--font-serif); font-size: 18px; color: var(--text-muted); }
.founder-copy h2 { font-family: var(--font-display); font-weight: 500; font-size: clamp(34px, 4.4vw, 54px); }
.founder-copy p { font-family: var(--font-serif); font-size: 19px; line-height: 1.5; }

/* ---------- Team / table ---------- */
.team {
  background: var(--bg-soft);
  padding: 100px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 56px;
}
.team h2 { font-family: var(--font-sans); font-weight: 500; font-size: clamp(32px, 4.4vw, 52px); max-width: 1200px; width: 100%; }
.team-table { max-width: 1200px; width: 100%; }
.team-labels { display: flex; justify-content: space-between; font-size: 14px; padding-bottom: 12px; }
.team-labels span:last-child { text-align: right; }
.team-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
  border-top: 1px solid var(--border-subtle);
  font-size: 18px;
  gap: 16px;
}
.team-row:last-child { border-bottom: 1px solid var(--border-subtle); }
.team-row .type { font-family: var(--font-sans); font-weight: 500; flex: 1; }
.team-row .who { font-family: var(--font-serif); flex: 1; }
.team-row .mail { font-family: var(--font-serif); flex: 1; text-align: right; text-decoration: underline; }

/* ---------- Call to action ---------- */
.cta {
  padding: 110px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 30px;
  text-align: center;
}
.cta.bg-soft { background: var(--bg-soft); }
.cta.bg-white { background: var(--white); }
.cta h2 { font-family: var(--font-sans); font-weight: 500; font-size: clamp(26px, 3.6vw, 40px); line-height: 1.35; }

/* ---------- Footer ---------- */
.footer {
  background: var(--paper);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  color: var(--olive);
}
.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  max-width: 1300px;
  margin: 0 auto;
  width: 100%;
}
.footer-links { display: flex; gap: 20px; font-family: var(--font-display); font-weight: 500; font-size: 18px; flex-wrap: wrap; }
.footer-copy { font-family: var(--font-serif); font-size: 18px; text-align: right; }
.footer-mark { display: flex; justify-content: center; opacity: 0.5; }
.footer-mark svg { width: 64px; height: 64px; fill: var(--olive); }

/* ---------- Article page ---------- */
.article-header {
  background: var(--ink-950);
  color: var(--paper);
  padding: 90px 24px 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  text-align: center;
}
.article-header .kicker { font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.18em; color: var(--copper); }
.article-header h1 { font-family: var(--font-display); font-weight: 500; font-size: clamp(34px, 5vw, 56px); }
.article-cover { display: flex; justify-content: center; padding: 0 24px; margin-top: -40px; }
.article-cover img { width: 100%; max-width: 900px; aspect-ratio: 16/9; object-fit: cover; border-radius: 2px; }
.article-body {
  max-width: 680px;
  margin: 0 auto;
  padding: 70px 24px 110px;
  font-family: var(--font-serif);
  font-size: 19px;
  line-height: 1.85;
  color: var(--ink-950);
}
.article-body p { margin-bottom: 22px; }
.article-body blockquote {
  border-left: 2px solid var(--copper);
  padding-left: 20px;
  margin: 32px 0;
  font-style: normal;
  color: var(--olive);
}
.article-back { display: block; max-width: 680px; margin: 0 auto 40px; padding: 0 24px; }
.article-back a { font-family: var(--font-sans); font-size: 15px; color: var(--copper); }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .directions-grid { grid-template-columns: repeat(2, 1fr); }
  .featured-inner, .intro-dark-inner, .about-intro-inner, .founder-inner {
    grid-template-columns: 1fr;
  }
  .about-intro-copy, .founder-copy { padding: 40px 32px; }
  .values-grid { grid-template-columns: 1fr; }
  .team-row { flex-direction: column; align-items: flex-start; gap: 4px; }
  .team-row .who, .team-row .mail { text-align: left; }
  .team-labels { display: none; }
}

@media (max-width: 640px) {
  .nav { padding: 0 16px; height: 64px; }
  .nav-links { gap: 16px; }
  .nav-links a { font-size: 13px; }
  .directions-grid { grid-template-columns: 1fr; }
  .hero { padding: 90px 20px; }
  .footer-row { flex-direction: column; align-items: flex-start; }
  .footer-copy { text-align: left; }
}