:root {
  --color-primary: #1c69d4;
  --color-primary-active: #0653b6;
  --color-primary-disabled: #d6d6d6;
  --color-ink: #262626;
  --color-body: #3c3c3c;
  --color-body-strong: #1a1a1a;
  --color-muted: #6b6b6b;
  --color-muted-soft: #9a9a9a;
  --color-hairline: #e6e6e6;
  --color-hairline-strong: #cccccc;
  --color-canvas: #ffffff;
  --color-surface-soft: #f7f7f7;
  --color-surface-card: #fafafa;
  --color-surface-strong: #ebebeb;
  --color-surface-dark: #1a2129;
  --color-surface-dark-elevated: #262e38;
  --color-on-primary: #ffffff;
  --color-on-dark: #ffffff;
  --color-on-dark-soft: #bbbbbb;
  --color-m-blue-light: #0066b1;
  --color-m-blue-dark: #1c69d4;
  --color-m-red: #e22718;
  --font: "BMW Type Next Latin", system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --rounded-none: 0px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 48px;
  --space-section: 80px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--color-body);
  background: var(--color-canvas);
  font-size: 16px;
  font-weight: 300;
  line-height: 1.55;
}
a { color: var(--color-ink); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 1440px; margin: 0 auto; padding: 0 32px; }

.header {
  background: var(--color-canvas);
  border-bottom: 1px solid var(--color-hairline);
  position: sticky;
  top: 0;
  z-index: 20;
}
.header-inner {
  display: flex; align-items: center; gap: 24px;
  min-height: 64px; flex-wrap: wrap;
}
.logo {
  font-weight: 700; color: var(--color-ink); font-size: 18px; letter-spacing: 0.5px;
}
.logo:hover { text-decoration: none; }
.nav { display: flex; flex-wrap: wrap; gap: 4px 24px; flex: 1; }
.nav a {
  color: var(--color-ink); font-size: 14px; font-weight: 400; letter-spacing: 0.3px;
}
.nav a:hover { text-decoration: none; color: var(--color-primary); }
.nav a.on { color: var(--color-primary); font-weight: 700; }
.back { margin-left: auto; font-size: 13px; color: var(--color-muted); letter-spacing: 0.5px; }

.hero {
  background: var(--color-surface-dark);
  color: var(--color-on-dark);
  padding: var(--space-section) 0;
}
.hero h1 {
  font-size: 64px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: 0;
  margin: 0 0 12px;
  color: var(--color-on-dark);
}
.hero p {
  margin: 0 0 32px;
  color: var(--color-on-dark-soft);
  max-width: 36em;
  font-weight: 300;
}
.hero .btn { margin-right: 12px; }

.section { padding: var(--space-section) 0; }
.section.alt { background: var(--color-surface-soft); }
.section h2 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-ink);
  margin: 0 0 32px;
}
.muted { color: var(--color-body); font-weight: 300; }

.grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }

.card {
  background: var(--color-canvas);
  padding: 0 0 24px;
}
.card h3 {
  margin: 16px 24px 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-ink);
}
.card p {
  margin: 0 24px;
  color: var(--color-muted);
  font-size: 14px;
  font-weight: 300;
}
.more {
  display: inline-block;
  margin: 16px 24px 0;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--color-ink);
}
.more:hover { color: var(--color-primary); text-decoration: none; }

.spec {
  padding: 24px 0;
  border-top: 1px solid var(--color-hairline);
}
.spec b {
  display: block;
  font-size: 24px;
  font-weight: 700;
  color: var(--color-ink);
}
.spec span {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--color-muted);
}

.ph {
  background: var(--color-surface-card);
  color: var(--color-muted-soft);
  height: 160px;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px;
}

.list { list-style: none; margin: 0; padding: 0; }
.list li {
  border-bottom: 1px solid var(--color-hairline);
  padding: 16px 0;
  display: flex; gap: 16px;
  font-weight: 300;
}
.list .date {
  color: var(--color-muted);
  min-width: 7em;
  font-size: 12px;
  letter-spacing: 0.5px;
  font-weight: 400;
}

.cta-dark {
  background: var(--color-surface-dark);
  color: var(--color-on-dark);
  padding: var(--space-section) 0;
  text-align: center;
}
.cta-dark h2 { color: var(--color-on-dark); margin-bottom: 24px; }

form label {
  display: block; margin: 0 0 4px;
  font-size: 13px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase;
}
form input, form textarea {
  width: 100%; max-width: 480px; padding: 14px 16px; height: 48px;
  border: 1px solid var(--color-hairline); border-radius: var(--rounded-none);
  font: inherit; margin-bottom: 12px; background: var(--color-canvas); color: var(--color-ink);
}
form textarea { height: auto; }
form input:focus, form textarea:focus { outline: none; border-color: var(--color-ink); border-width: 2px; }
form button, .btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 32px; height: 48px; border: 0;
  background: var(--color-primary); color: var(--color-on-primary);
  font: inherit; font-size: 14px; font-weight: 700; letter-spacing: 0.5px;
  cursor: pointer; border-radius: var(--rounded-none);
}
.btn:hover { text-decoration: none; color: var(--color-on-primary); }
.btn:active { background: var(--color-primary-active); }
.btn-ghost {
  background: transparent;
  color: var(--color-on-dark);
  border: 1px solid var(--color-on-dark);
}
.btn-ghost:hover { color: var(--color-on-dark); }
.btn-line {
  background: var(--color-canvas);
  color: var(--color-ink);
  border: 1px solid var(--color-hairline-strong);
}
.btn-line:hover { color: var(--color-ink); }

.footer {
  background: var(--color-surface-soft);
  padding: 64px 0 40px;
  color: var(--color-muted);
  font-size: 14px;
  font-weight: 300;
}
.footer p { margin: 0 0 4px; }
.footer-cols { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-bottom: 32px; }
.footer h3 { font-size: 16px; font-weight: 700; color: var(--color-ink); margin: 0 0 12px; }
.footer a { color: var(--color-body); display: block; padding: 4px 0; }

@media (max-width: 900px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
  .grid-3, .grid-2, .footer-cols { grid-template-columns: 1fr; }
  .hero h1 { font-size: 40px; }
}

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