:root {
    color-scheme: light;
    --ink: #1f2933;
    --muted: #607080;
    --line: #dfe6ed;
    --paper: #ffffff;
    --wash: #f4f7f9;
    --accent: #176b87;
    --accent-dark: #0f4c63;
    --warn-bg: #fff7e6;
    --warn-line: #e8b64c;
}

* { box-sizing: border-box; }
html { font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif; color: var(--ink); background: var(--wash); }
body { margin: 0; line-height: 1.75; }
a { color: var(--accent); }
a:hover { color: var(--accent-dark); }
.site-header { background: var(--paper); border-bottom: 1px solid var(--line); }
.header-inner, .page, .site-footer-inner { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.header-inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { color: var(--ink); text-decoration: none; font-size: 19px; font-weight: 700; white-space: nowrap; }
.brand small { display: block; color: var(--muted); font-size: 11px; font-weight: 400; line-height: 1.2; }
.nav { display: flex; gap: 18px; flex-wrap: wrap; justify-content: flex-end; }
.nav a { padding: 4px 0; text-decoration: none; color: var(--muted); font-size: 14px; }
.nav a[aria-current="page"], .nav a:hover { color: var(--accent); }
.page { padding: 52px 0 72px; }
.hero { display: grid; grid-template-columns: 1.25fr .75fr; gap: 40px; align-items: end; padding: 24px 0 48px; }
.eyebrow { color: var(--accent); font-size: 13px; font-weight: 700; letter-spacing: 0; }
h1 { margin: 10px 0 16px; font-size: clamp(32px, 5vw, 52px); line-height: 1.2; letter-spacing: 0; }
h2 { margin: 36px 0 12px; font-size: 24px; line-height: 1.35; }
h3 { margin: 24px 0 8px; font-size: 18px; }
p { margin: 10px 0; }
.lead { color: var(--muted); font-size: 18px; max-width: 700px; }
.hero-note { border-left: 3px solid var(--accent); padding: 16px 18px; background: var(--paper); color: var(--muted); }
.section { padding: 28px 0; border-top: 1px solid var(--line); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.item { background: var(--paper); border: 1px solid var(--line); padding: 20px; }
.item h3 { margin-top: 0; }
.item p { color: var(--muted); font-size: 14px; }
.prose { max-width: 840px; }
.prose ul, .prose ol { padding-left: 24px; }
.prose li { margin: 6px 0; }
.meta { color: var(--muted); font-size: 13px; }
.config-notice { display: flex; gap: 12px; align-items: baseline; margin: 0 0 28px; padding: 13px 16px; background: var(--warn-bg); border: 1px solid var(--warn-line); color: #614b1b; font-size: 14px; }
.config-notice strong { white-space: nowrap; }
.callout { margin: 20px 0; padding: 16px 18px; border-left: 3px solid var(--accent); background: #edf7fa; }
.callout.warning { border-left-color: #b7791f; background: var(--warn-bg); }
.site-footer { border-top: 1px solid var(--line); background: var(--paper); }
.site-footer-inner { padding: 28px 0; color: var(--muted); font-size: 13px; display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer-links { display: flex; flex-wrap: wrap; gap: 14px; }
.footer-links a { text-decoration: none; }
@media (max-width: 760px) {
    .header-inner { align-items: flex-start; flex-direction: column; padding: 16px 0; }
    .nav { justify-content: flex-start; gap: 12px 16px; }
    .hero { grid-template-columns: 1fr; gap: 18px; padding-top: 8px; }
    .grid { grid-template-columns: 1fr; }
    .page { padding-top: 32px; }
    .config-notice { align-items: flex-start; flex-direction: column; gap: 2px; }
}