:root {
  --ink: #152c34;
  --ink-text: #1b2c32;
  --ivory: #f7f6f1;
  --paper: #f6f7f1;
  --card: #fffefa;
  --wash: #ecf1eb;
  --forest: #356653;
  --forest-deep: #274c3e;
  --lime: #d4e6aa;
  --sage: #c8e0b7;
  --eyebrow: #4f6a5c;
  --muted: #6e7874;
  --line: #dce0d8;
  --danger: #995b46;
  --shadow: 0 18px 50px rgba(21, 44, 52, 0.08);
  --serif: "Newsreader", "Iowan Old Style", "Palatino Linotype", Palatino, serif;
  --sans: "Source Sans 3", "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
  --measure: 720px;
  --page: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink-text);
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: var(--forest); text-underline-offset: 3px; }
button, .lang button { font: inherit; }

html[data-lang="zh"] .en { display: none !important; }
html[data-lang="en"] .zh { display: none !important; }

.skip {
  position: absolute;
  left: 12px;
  top: -40px;
  background: var(--lime);
  color: var(--ink);
  padding: 8px 12px;
  z-index: 10;
}
.skip:focus { top: 12px; }

.nav {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 28px;
  background: rgba(246, 247, 241, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(220, 224, 216, 0.9);
}
.brand img { height: 36px; width: auto; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
}
.nav-links a {
  color: var(--ink-text);
  text-decoration: none;
  font-size: 16px;
}
.nav-links a:hover,
.nav-links a[aria-current="page"] { color: var(--forest); }
.lang {
  display: flex;
  padding: 3px;
  background: var(--wash);
  border-radius: 999px;
}
.lang button {
  border: 0;
  background: transparent;
  color: var(--eyebrow);
  border-radius: 999px;
  padding: 6px 12px;
  cursor: pointer;
}
.lang button[aria-pressed="true"] {
  background: var(--card);
  color: var(--ink);
  box-shadow: 0 1px 2px rgba(21, 44, 52, 0.08);
}

.hero {
  background: var(--ink);
  color: var(--ivory);
  padding: 72px 28px 64px;
}
.hero-inner, .wrap, .legal {
  width: min(var(--page), calc(100% - 8px));
  margin: 0 auto;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}
.kicker {
  display: inline-block;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 12px;
  font-weight: 650;
  color: var(--sage);
}
.hero h1, .section h2, .legal h1, .display {
  font-family: var(--serif);
  font-weight: 450;
  letter-spacing: -0.03em;
  line-height: 1.05;
}
.hero h1 { font-size: clamp(46px, 6vw, 76px); margin: 14px 0 16px; }
.lede { font-size: 20px; color: #c4ccc6; max-width: 38rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 650;
}
.btn-lime { background: var(--lime); color: var(--ink); }
.btn-ghost { color: var(--ivory); border: 1px solid rgba(255,255,255,0.22); }
.btn-forest { background: var(--forest); color: white; }
.fine { margin-top: 14px; color: #c4ccc6; font-size: 15px; }

.coach-card {
  display: grid;
  grid-template-columns: 148px 1fr;
  gap: 18px;
  align-items: center;
  padding: 18px;
  border-radius: 28px;
  background: rgba(255,255,255,0.06);
}
.coach-card img {
  width: 148px;
  height: 148px;
  object-fit: cover;
  border-radius: 24px;
}
.coach-card strong { display: block; font-size: 22px; }
.coach-card span { color: var(--sage); font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 700; }
.coach-card p { margin: 8px 0 0; color: #c4ccc6; }

.section { padding: 76px 28px; }
.section h2 { font-size: clamp(36px, 4vw, 52px); margin: 8px 0 12px; }
.sub { color: var(--muted); max-width: 40rem; }

.steps, .coaches, .split, .facts {
  display: grid;
  gap: 16px;
  margin-top: 32px;
}
.steps { grid-template-columns: repeat(3, 1fr); }
.coaches { grid-template-columns: repeat(4, 1fr); }
.card, .fact, .step, .person {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 22px;
}
.step em, .eyebrow {
  font-style: normal;
  color: var(--eyebrow);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.step h3, .person h3, .fact h3 { margin: 8px 0; font-size: 22px; }
.step p, .person p, .fact p, .card p { color: var(--muted); margin: 0; }
.person { text-align: center; }
.person img {
  width: 112px;
  height: 112px;
  object-fit: cover;
  border-radius: 50%;
  margin: 0 auto 12px;
}
.quote {
  font-family: var(--serif);
  font-size: 28px;
  line-height: 1.25;
  color: var(--ink);
}
.quote + .quote { margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--line); }
.wash { background: var(--wash); }
.ink-band {
  background: var(--ink);
  color: var(--ivory);
}
.ink-band .sub, .ink-band p { color: #c4ccc6; }
.split { grid-template-columns: 1.1fr 0.9fr; align-items: start; }
.facts { grid-template-columns: 1fr 1fr; }

.footer {
  padding: 36px 28px 48px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 15px;
}
.footer-inner {
  width: min(var(--page), 100%);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}
.footer a { color: var(--ink-text); text-decoration: none; margin-right: 16px; }
.footer a:hover { color: var(--forest); }

.legal { padding: 42px 28px 80px; }
.legal h1 { font-size: clamp(42px, 5vw, 64px); margin: 10px 0 8px; }
.meta { color: var(--muted); }
.summary {
  background: var(--wash);
  border-radius: 22px;
  padding: 22px 24px;
  margin: 28px 0;
}
.summary ul, .legal ul, .legal ol { padding-left: 1.2em; }
.summary li + li, .legal li + li { margin-top: 6px; }
.legal h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 32px;
  margin: 42px 0 10px;
  letter-spacing: -0.02em;
}
.legal h3 { font-size: 20px; margin: 26px 0 8px; }
.legal p { max-width: 46rem; }
.toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin: 18px 0 8px;
}
.toc a { font-size: 15px; }
table {
  width: 100%;
  max-width: 920px;
  border-collapse: collapse;
  margin: 16px 0 8px;
  font-size: 15.5px;
  background: var(--card);
  table-layout: fixed;
}
th, td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
  overflow-wrap: anywhere;
}
th { background: var(--wash); font-weight: 650; }
.note {
  border-left: 3px solid var(--forest);
  padding-left: 14px;
  color: var(--ink-text);
}

@media (max-width: 900px) {
  .hero-grid, .steps, .coaches, .split, .facts { grid-template-columns: 1fr; }
  .nav { flex-wrap: wrap; }
  .hero { padding-top: 42px; }
  .coach-card { grid-template-columns: 96px 1fr; }
  .coach-card img { width: 96px; height: 96px; }
}