:root {
  --color-primary: #0f62fe;
  --color-on-primary: #ffffff;
  --color-ink: #161616;
  --color-ink-muted: #525252;
  --color-ink-subtle: #8c8c8c;
  --color-canvas: #ffffff;
  --color-surface-1: #f4f4f4;
  --color-surface-2: #e0e0e0;
  --color-inverse-canvas: #161616;
  --color-inverse-surface-1: #262626;
  --color-inverse-ink: #ffffff;
  --color-inverse-ink-muted: #c6c6c6;
  --color-hairline: #e0e0e0;
  --color-hairline-strong: #161616;
  --color-blue-60: #0043ce;
  --color-blue-80: #002d9c;
  --color-blue-hover: #0050e6;
  --color-semantic-success: #24a148;
  --color-semantic-warning: #f1c21b;
  --color-semantic-error: #da1e28;
  --color-semantic-info: #0f62fe;

  --font-sans: "IBM Plex Sans", "Helvetica Neue", Arial, system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;

  --rounded-none: 0px;
  --rounded-xs: 2px;
  --rounded-sm: 4px;
  --rounded-md: 6px;
  --rounded-lg: 8px;
  --rounded-pill: 9999px;

  --space-xxs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 48px;
  --space-section: 96px;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: var(--font-sans);
  background: var(--color-canvas);
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: 0.16px;
}
a { color: var(--color-primary); text-decoration: none; }
img { max-width: 100%; }

.wrap { max-width: 1584px; margin: 0 auto; padding: 0 32px; }

.utility {
  background: var(--color-surface-1);
  color: var(--color-ink-muted);
  height: 32px;
  font-size: 12px;
  letter-spacing: 0.32px;
  display: flex;
  align-items: center;
}
.utility .wrap { display: flex; justify-content: space-between; width: 100%; }

.header {
  background: var(--color-canvas);
  height: 48px;
  border-bottom: 1px solid var(--color-hairline);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 48px;
  flex-wrap: wrap;
}
.logo {
  font-weight: 400;
  font-size: 16px;
  letter-spacing: 0.16px;
  color: var(--color-ink);
}
.nav { display: flex; flex-wrap: wrap; gap: 4px 20px; flex: 1; }
.nav a { color: var(--color-ink); font-size: 14px; letter-spacing: 0.16px; }
.nav a.on { font-weight: 600; box-shadow: inset 0 -2px 0 var(--color-primary); }
.back { margin-left: auto; font-size: 12px; color: var(--color-ink-subtle); letter-spacing: 0.32px; }

.hero {
  padding: 96px 0 64px;
  background: linear-gradient(180deg, rgba(15,98,254,0.06), var(--color-canvas) 70%);
}
.eyebrow {
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.16px;
  color: var(--color-ink-muted);
  margin: 0 0 8px;
  text-transform: none;
}
.hero h1 {
  font-size: 76px;
  font-weight: 300;
  line-height: 1.17;
  letter-spacing: -0.5px;
  margin: 0 0 16px;
  max-width: 16ch;
}
.hero p {
  margin: 0 0 24px;
  color: var(--color-ink-muted);
  font-size: 18px;
  max-width: 40em;
  letter-spacing: 0;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 8px; }

.btn,
form button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 16px;
  background: var(--color-primary);
  color: var(--color-on-primary);
  border: 0;
  border-radius: var(--rounded-none);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.16px;
  line-height: 1.29;
  cursor: pointer;
}
.btn:hover, form button:hover { text-decoration: none; color: var(--color-on-primary); }
.btn-secondary {
  background: var(--color-ink);
  color: var(--color-inverse-ink);
}
.btn-tertiary {
  background: var(--color-canvas);
  color: var(--color-primary);
  box-shadow: inset 0 0 0 1px var(--color-primary);
}

.section { padding: 64px 0; }
.section.alt { background: var(--color-surface-1); }
.section h2 {
  font-size: 42px;
  font-weight: 300;
  line-height: 1.2;
  letter-spacing: 0;
  margin: 0 0 24px;
}
.muted { color: var(--color-ink-muted); }

.grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0; }

.card {
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-none);
  padding: 24px;
}
.card h3 {
  margin: 0 0 8px;
  font-size: 24px;
  font-weight: 400;
  line-height: 1.33;
  letter-spacing: 0;
}
.card p { margin: 0; color: var(--color-ink-muted); font-size: 14px; letter-spacing: 0.16px; }

.ph {
  background: var(--color-surface-1);
  color: var(--color-ink-subtle);
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  letter-spacing: 0.32px;
  margin-bottom: 16px;
  border-radius: var(--rounded-none);
}

.tabs {
  display: flex;
  border-bottom: 1px solid var(--color-hairline);
  margin-bottom: 24px;
}
.tabs a {
  padding: 16px 20px;
  color: var(--color-ink-muted);
  font-size: 14px;
  letter-spacing: 0.16px;
}
.tabs a.on {
  color: var(--color-ink);
  font-weight: 600;
  box-shadow: inset 0 -2px 0 var(--color-primary);
}

.cta-banner {
  background: var(--color-primary);
  color: var(--color-on-primary);
  padding: 48px 0;
}
.cta-banner h2 { color: var(--color-on-primary); margin: 0 0 16px; }
.cta-banner .btn {
  background: var(--color-canvas);
  color: var(--color-primary);
}

.list { list-style: none; margin: 0; padding: 0; }
.list li {
  border-bottom: 1px solid var(--color-hairline);
  padding: 16px 0;
  font-size: 16px;
}
.list .date { color: var(--color-ink-subtle); margin-right: 16px; font-size: 12px; letter-spacing: 0.32px; }

form label { display: block; margin: 0 0 4px; font-size: 14px; letter-spacing: 0.16px; }
form input, form textarea {
  width: 100%;
  max-width: 480px;
  padding: 11px 16px;
  border: 0;
  border-bottom: 1px solid var(--color-ink);
  background: var(--color-surface-1);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 16px;
  letter-spacing: 0.16px;
  border-radius: var(--rounded-none);
  margin-bottom: 12px;
}
form input:focus, form textarea:focus {
  outline: none;
  border-bottom: 2px solid var(--color-primary);
}

.footer {
  background: var(--color-inverse-canvas);
  color: var(--color-inverse-ink-muted);
  padding: 64px 0 40px;
  font-size: 14px;
  letter-spacing: 0.16px;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}
.footer h3 { margin: 0 0 12px; color: var(--color-inverse-ink); font-size: 14px; font-weight: 400; }
.footer a { display: block; color: var(--color-inverse-ink-muted); margin-bottom: 8px; }
.footer p { margin: 0 0 4px; }

@media (max-width: 900px) {
  .hero h1 { font-size: 32px; }
  .section h2 { font-size: 28px; }
  .grid, .grid-3, .grid-2, .footer-grid { grid-template-columns: 1fr; }
}

.ph { overflow: hidden; }
.ph img { width: 100%; height: 100%; object-fit: cover; display: block; }