/* ── SHARED CSS · Vast Bridge品牌内容站 ── */
:root {
  --white: #ffffff;
  --bg: #f7f7f5;
  --bg2: #efefec;
  --ink: #111110;
  --ink2: #3a3a38;
  --muted: #78786e;
  --border: #e5e4e0;
  --border2: #ccccc6;
  --teal: #0a7c6e;
  --teal-light: #e8f4f2;
  --teal-mid: #b8ddd8;
  --font-display: 'DM Serif Display', serif;
  --font-sans: 'DM Sans', 'Noto Sans SC', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { background: var(--white); color: var(--ink); font-family: var(--font-sans); font-weight: 300; line-height: 1.65; -webkit-font-smoothing: antialiased; }

/* ── LAYOUT ── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 48px; }
.divider { border: none; border-top: 1px solid var(--border); }

/* ── NAV ── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,.93); backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border); height: 60px;
  display: flex; align-items: center; padding: 0 48px;
  transition: box-shadow .2s;
}
nav.scrolled { box-shadow: 0 1px 16px rgba(0,0,0,.06); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; width: 100%; max-width: 1200px; margin: 0 auto; }
.nav-logo { font-family: var(--font-sans); font-size: 16px; font-weight: 500; color: var(--ink); text-decoration: none; display: flex; align-items: center; gap: 7px; letter-spacing: -.2px; }
.logo-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--teal); flex-shrink: 0; }
.nav-links { display: flex; gap: 28px; }
.nav-links a { font-size: 14px; font-weight: 400; color: var(--muted); text-decoration: none; transition: color .15s; }
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.nav-right { display: flex; align-items: center; gap: 12px; }
.nav-text-link { font-size: 13px; color: var(--muted); text-decoration: none; transition: color .15s; }
.nav-text-link:hover { color: var(--ink); }

/* ── BUTTONS ── */
.btn { display: inline-block; padding: 12px 26px; border-radius: 8px; font-size: 14px; font-weight: 500; font-family: var(--font-sans); cursor: pointer; text-decoration: none; transition: all .18s; border: none; }
.btn-dark { background: var(--ink); color: var(--white); }
.btn-dark:hover { background: #2a2a28; transform: translateY(-1px); box-shadow: 0 6px 20px rgba(0,0,0,.15); }
.btn-outline { background: transparent; color: var(--ink); border: 1.5px solid var(--border2); }
.btn-outline:hover { border-color: var(--ink2); background: var(--bg); }
.btn-teal { background: var(--teal); color: var(--white); }
.btn-teal:hover { background: #086057; transform: translateY(-1px); box-shadow: 0 6px 20px rgba(10,124,110,.25); }
.btn-white { background: var(--white); color: var(--ink); }
.btn-white:hover { background: var(--bg); transform: translateY(-1px); }

/* ── TYPOGRAPHY ── */
.label { font-size: 11px; font-weight: 500; letter-spacing: .18em; text-transform: uppercase; color: var(--teal); display: block; margin-bottom: 14px; }
h2 { font-family: var(--font-display); font-size: clamp(28px,4vw,48px); font-weight: 400; line-height: 1.1; letter-spacing: -.5px; margin-bottom: 16px; }
h2.page-title { font-size: clamp(32px,5vw,56px); }
.desc { font-size: 16px; color: var(--muted); max-width: 480px; line-height: 1.75; }

/* ── PAGE HEADER ── */
.page-header { padding: 120px 0 64px; border-bottom: 1px solid var(--border); margin-bottom: 64px; }
.page-header .label { margin-bottom: 16px; }

/* ── FOOTER ── */
footer { border-top: 1px solid var(--border); padding: 56px 48px 32px; margin-top: 0; }
.footer-inner { max-width: 1200px; margin: 0 auto; }
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; padding-bottom: 40px; border-bottom: 1px solid var(--border); margin-bottom: 28px; }
.footer-logo { font-size: 15px; font-weight: 500; color: var(--ink); display: flex; align-items: center; gap: 7px; margin-bottom: 12px; }
.footer-desc { font-size: 13px; color: var(--muted); line-height: 1.7; max-width: 220px; }
.footer-addr { font-size: 12px; color: var(--muted); margin-top: 14px; line-height: 1.8; }
.footer-col h4 { font-size: 11px; font-weight: 500; color: var(--ink); margin-bottom: 14px; letter-spacing: .06em; text-transform: uppercase; }
.footer-col a { display: block; font-size: 13px; color: var(--muted); text-decoration: none; margin-bottom: 10px; transition: color .15s; }
.footer-col a:hover { color: var(--ink); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; }
.footer-bottom p { font-size: 12px; color: var(--muted); }

/* ── SCROLL REVEAL ── */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .65s ease, transform .65s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
.delay-1 { transition-delay: .1s; }
.delay-2 { transition-delay: .2s; }
.delay-3 { transition-delay: .3s; }

/* ── RESPONSIVE ── */
@media(max-width:900px) {
  nav { padding: 0 20px; }
  .nav-links { display: none; }
  .container { padding: 0 20px; }
  footer { padding: 40px 20px 24px; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 28px; }
}