:root {
  --bg: #FDFCFA;
  --bg2: #FFFFFF;
  --ink: #1A1A2E;
  --muted: #4B5563;
  --rule: #E8E6E1;
  --accent: #C8102E;
  --accent2: #1A73E8;
  --accent-soft: rgba(200, 16, 46, 0.08);
  --accent2-soft: rgba(26, 115, 232, 0.08);
  --sh-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
  --sh-md: 0 4px 20px rgba(0, 0, 0, 0.06);
  --r: 12px;
  --r-lg: 20px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0F0F1A;
    --bg2: #1A1A2E;
    --ink: #E8E8F0;
    --muted: #9CA3AF;
    --rule: #2D2D44;
    --accent: #FF3B5C;
    --accent2: #4F9BF0;
    --accent-soft: rgba(255, 59, 92, 0.12);
    --accent2-soft: rgba(79, 155, 240, 0.12);
  }
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Noto Sans CJK SC", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  padding-top: 58px;
}
img { max-width: 100%; height: auto; }
a { color: var(--accent2); }
nav {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 100;
  background: rgba(253, 252, 250, 0.92);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--rule);
}
@media (prefers-color-scheme: dark) {
  nav { background: rgba(15, 15, 26, 0.92); }
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 960px; margin: 0 auto; padding: 10px 20px; height: 58px; gap: 12px;
}
.logo { display: flex; align-items: center; gap: 8px; text-decoration: none; color: var(--ink); font-weight: 700; font-size: 18px; }
.logo img { height: 36px; width: auto; display: block; }
.logo-fallback { display: none; }
.logo.no-img .logo-fallback { display: inline; }
.logo.no-img img { display: none; }
.nav-links { display: flex; align-items: center; gap: 18px; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: 14px; font-weight: 500; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ink); }
.nav-cta {
  padding: 8px 16px; border-radius: 100px; background: var(--ink); color: #fff !important;
  font-weight: 700; font-size: 13px; text-decoration: none; white-space: nowrap;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 28px 20px 72px; }
.crumb { font-size: 13px; color: var(--muted); margin-bottom: 18px; }
.crumb a { color: var(--muted); text-decoration: none; }
.crumb a:hover { color: var(--accent); }
.kicker {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: 100px; background: var(--accent-soft);
  color: var(--accent); font-size: 12px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase;
}
h1 { font-size: clamp(26px, 4vw, 36px); line-height: 1.2; letter-spacing: -0.02em; margin: 14px 0 12px; }
.muted { color: var(--muted); font-size: 0.9rem; margin: 0 0 12px; }
.lead { font-size: 18px; color: var(--muted); margin-bottom: 28px; }
h2 { font-size: 22px; margin: 36px 0 12px; letter-spacing: -0.01em; }
h3 { font-size: 17px; margin: 24px 0 8px; }
p, li { font-size: 16px; }
p { margin-bottom: 14px; }
ul, ol { margin: 0 0 16px 1.2em; }
li { margin-bottom: 8px; }
.cn, .cn { font-family: "Noto Sans CJK SC", "PingFang SC", "Hiragino Sans GB", sans-serif; color: var(--accent); font-weight: 700; }
.py { color: var(--muted); font-style: italic; }
.phrase-grid { display: grid; gap: 12px; margin: 16px 0 24px; }
.phrase {
  background: var(--bg2); border: 1px solid var(--rule); border-radius: var(--r);
  padding: 14px 16px; box-shadow: var(--sh-sm);
}
.phrase .cn-line { font-size: 22px; font-weight: 800; color: var(--accent); line-height: 1.3; }
.phrase .py-line { font-size: 14px; color: var(--muted); margin: 2px 0 4px; }
.phrase .en-line { font-size: 15px; }
table { width: 100%; border-collapse: collapse; margin: 16px 0 24px; font-size: 15px; background: var(--bg2); }
th, td { border: 1px solid var(--rule); padding: 10px 12px; text-align: left; vertical-align: top; }
th { background: var(--accent-soft); font-size: 13px; letter-spacing: 0.03em; }
.callout {
  background: var(--accent2-soft); border-left: 4px solid var(--accent2);
  padding: 14px 16px; border-radius: 0 var(--r) var(--r) 0; margin: 18px 0;
}
.callout.freeze { background: var(--accent-soft); border-left-color: var(--accent); }
.geo-answer {
  background: var(--bg2); border: 1px solid var(--rule); border-radius: var(--r-lg);
  padding: 18px 18px 20px; margin: 8px 0 24px; box-shadow: var(--sh-sm);
}
.geo-q { font-weight: 800; font-size: 17px; line-height: 1.35; margin: 0 0 8px; }
.geo-a { margin: 0 0 10px; color: var(--muted); }
.geo-say { margin: 0 0 14px; }
.geo-say-label {
  display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--accent); margin-right: 8px;
}
.geo-answer .btn-p { margin-top: 0; }
.cta-box {
  margin: 36px 0; padding: 28px 22px; text-align: center;
  background: var(--bg2); border: 1px solid var(--rule); border-radius: var(--r-lg); box-shadow: var(--sh-md);
}
.cta-box p { color: var(--muted); }
.btn-p {
  display: inline-block; margin-top: 8px; padding: 14px 28px; border-radius: 100px;
  background: linear-gradient(135deg, var(--accent), #e0264a); color: #fff !important;
  font-weight: 700; font-size: 16px; text-decoration: none;
  box-shadow: 0 4px 16px rgba(200, 16, 46, 0.25);
}
.related { display: grid; gap: 10px; margin: 16px 0 8px; }
.related a {
  display: block; padding: 12px 14px; background: var(--bg2); border: 1px solid var(--rule);
  border-radius: var(--r); text-decoration: none; color: var(--ink); font-weight: 600;
}
.related a:hover { border-color: var(--accent); }
.related span { display: block; font-size: 13px; font-weight: 400; color: var(--muted); margin-top: 2px; }
.faq details {
  background: var(--bg2); border: 1px solid var(--rule); border-radius: var(--r);
  padding: 12px 16px; margin-bottom: 10px;
}
.faq summary { cursor: pointer; font-weight: 700; }
.faq details p { margin: 10px 0 4px; }
.disclaimer { font-size: 13px; color: var(--muted); }
footer {
  background: linear-gradient(180deg, #1a1a2e, #0f0c29); color: rgba(255, 255, 255, 0.6); padding: 40px 20px 28px;
}
.foot-inner { max-width: 960px; margin: 0 auto; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 28px; }
.foot-grid h4 { color: #fff; font-size: 13px; letter-spacing: 0.05em; text-transform: uppercase; margin-bottom: 12px; }
.foot-grid a { display: block; color: rgba(255, 255, 255, 0.55); text-decoration: none; font-size: 13px; padding: 4px 0; }
.foot-grid a:hover { color: #fff; }
.foot-brand { color: #fff; font-weight: 700; margin-bottom: 10px; }
.foot-legal { margin-top: 24px; font-size: 12px; color: rgba(255, 255, 255, 0.4); }
@media (max-width: 720px) {
  .nav-links a:not(.nav-cta) { display: none; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  h1 { font-size: 26px; }
  .lead { font-size: 16px; }
  table { font-size: 13px; }
}
@media (max-width: 480px) {
  .foot-grid { grid-template-columns: 1fr; }
}