:root {
    --bg: #fafaf8;
    --surface: #ffffff;
    --surface-soft: #f3efe8;
    --border: #e8e4dc;
    --border-strong: #d4cfc4;
    --text: #1a1a1a;
    --text-2: #5e5e5e;
    --text-3: #8a847b;
    --accent: #c8362a;
    --accent-soft: #f7e8e6;
    --green: #17372f;
    --shadow: 0 14px 38px rgba(28, 25, 22, 0.08);
    --radius-sm: 8px;
    --radius: 14px;
    --radius-lg: 22px;
}

* { box-sizing: border-box; }

html {
    color-scheme: light;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 16px;
    line-height: 1.72;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.skip-link {
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 100;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    background: var(--text);
    color: #fff;
    transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    border-bottom: 1px solid rgba(212, 207, 196, 0.8);
    background: rgba(250, 250, 248, 0.9);
    backdrop-filter: saturate(180%) blur(16px);
    -webkit-backdrop-filter: saturate(180%) blur(16px);
}

.header-inner {
    width: min(1120px, calc(100% - 40px));
    min-height: 72px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand-link { display: inline-flex; align-items: center; }
.brand-logo { display: block; width: 142px; height: auto; }

.site-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 18px;
    flex-wrap: wrap;
    font-size: 13px;
    font-weight: 600;
}

.site-nav a {
    text-decoration: none;
    color: var(--text-2);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] { color: var(--accent); }

.page-shell {
    width: min(1040px, calc(100% - 40px));
    margin: 0 auto;
    padding: 68px 0 90px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 26px;
    color: var(--text-3);
    font-size: 12px;
}

.breadcrumb a { text-decoration: none; }
.breadcrumb a:hover { color: var(--text); }

.hero {
    max-width: 850px;
    margin-bottom: 48px;
}

.eyebrow {
    margin-bottom: 12px;
    color: var(--accent);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

h1, h2, h3 { margin-top: 0; line-height: 1.22; }

h1 {
    margin-bottom: 20px;
    font-family: ui-serif, Georgia, "Songti SC", serif;
    font-size: clamp(38px, 6vw, 68px);
    font-weight: 600;
    letter-spacing: -0.035em;
}

.lead {
    max-width: 760px;
    margin: 0;
    color: var(--text-2);
    font-size: clamp(17px, 2.4vw, 21px);
    line-height: 1.65;
}

.updated {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 20px;
    color: var(--text-3);
    font-size: 12px;
}

.updated::before {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #2f8a4b;
    content: "";
}

.answer-box {
    margin: 0 0 34px;
    padding: 26px 28px;
    border-radius: var(--radius-lg);
    background: var(--green);
    color: #fff;
    box-shadow: var(--shadow);
}

.answer-box strong {
    display: block;
    margin-bottom: 7px;
    color: #ff917a;
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.answer-box p { margin: 0; font-size: 17px; line-height: 1.65; }

.content-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.content-section {
    min-width: 0;
    margin-bottom: 18px;
    padding: 30px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: 0 1px 2px rgba(28, 25, 22, 0.03);
}

.content-section.full { grid-column: 1 / -1; }

.content-section h2 {
    margin-bottom: 14px;
    font-size: 22px;
    letter-spacing: -0.015em;
}

.content-section h3 { margin: 22px 0 8px; font-size: 17px; }
.content-section p { margin: 0 0 13px; color: var(--text-2); }
.content-section p:last-child { margin-bottom: 0; }

.content-section ul,
.content-section ol {
    margin: 0;
    padding-left: 1.25em;
    color: var(--text-2);
}

.content-section li + li { margin-top: 8px; }

.fact-list {
    display: grid;
    grid-template-columns: minmax(120px, 0.35fr) minmax(0, 1fr);
    margin: 0;
}

.fact-list dt,
.fact-list dd {
    margin: 0;
    padding: 11px 0;
    border-bottom: 1px solid var(--border);
}

.fact-list dt { color: var(--text-3); font-size: 13px; }
.fact-list dd { color: var(--text-2); }

.metric-strip {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    margin: 0;
}

.metric-strip div {
    min-width: 0;
    padding: 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg);
}

.metric-strip dt {
    color: var(--text-3);
    font-size: 12px;
}

.metric-strip dd {
    margin: 4px 0 0;
    color: var(--green);
    font-family: ui-serif, Georgia, "Songti SC", serif;
    font-size: clamp(25px, 4vw, 38px);
    line-height: 1.15;
}

.data-table-wrap {
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    -webkit-overflow-scrolling: touch;
}

.data-table {
    width: 100%;
    min-width: 680px;
    border-collapse: collapse;
    font-variant-numeric: tabular-nums;
}

.table-scroll-hint {
    margin: -4px 0 12px;
    color: var(--text-3);
    font-size: 12px;
}

.data-table th,
.data-table td {
    padding: 11px 13px;
    border-bottom: 1px solid var(--border);
    text-align: right;
    white-space: nowrap;
}

.data-table th:first-child,
.data-table td:first-child { text-align: left; }
.data-table thead th { background: var(--surface-soft); color: var(--text-2); font-size: 12px; }
.data-table tbody th { color: var(--text); font-size: 13px; }
.data-table tbody td { color: var(--text-2); }
.data-table tbody tr:last-child th,
.data-table tbody tr:last-child td { border-bottom: 0; }

.link-list {
    display: grid;
    gap: 10px;
    margin-top: 18px;
}

.link-card {
    display: block;
    padding: 15px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg);
    text-decoration: none;
}

.link-card:hover { border-color: var(--border-strong); background: var(--surface-soft); }
.link-card strong { display: block; font-size: 14px; }
.link-card span { display: block; margin-top: 3px; color: var(--text-3); font-size: 12px; }

.note {
    margin-top: 20px;
    padding: 15px 17px;
    border-left: 3px solid var(--accent);
    background: var(--accent-soft);
    color: #6c312b;
    font-size: 13px;
}

.faq-list { display: grid; gap: 12px; }

.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
}

.faq-item summary {
    padding: 20px 22px;
    cursor: pointer;
    font-weight: 700;
    list-style-position: inside;
}

.faq-answer { padding: 0 22px 22px; color: var(--text-2); }
.faq-answer p { margin: 0; }

.cta-band {
    margin-top: 42px;
    padding: 28px;
    border-radius: var(--radius-lg);
    background: var(--surface-soft);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.cta-band h2 { margin-bottom: 5px; font-size: 21px; }
.cta-band p { margin: 0; color: var(--text-2); font-size: 14px; }

.button {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 18px;
    border-radius: var(--radius-sm);
    background: var(--text);
    color: #fff;
    text-decoration: none;
    font-size: 13px;
    font-weight: 700;
}

.site-footer {
    border-top: 1px solid var(--border);
    padding: 34px 20px 44px;
    color: var(--text-3);
    text-align: center;
    font-size: 12px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 8px;
}

.footer-links a { color: var(--text-2); text-decoration: none; }

@media (max-width: 760px) {
    .header-inner { width: min(100% - 28px, 1120px); min-height: 64px; }
    .brand-logo { width: 124px; }
    .site-nav { gap: 12px; font-size: 12px; }
    .site-nav a:nth-child(3) { display: none; }
    .page-shell { width: min(100% - 28px, 1040px); padding: 42px 0 64px; }
    .hero { margin-bottom: 34px; }
    .content-grid { grid-template-columns: 1fr; }
    .content-section.full { grid-column: auto; }
    .content-section { padding: 22px; }
    .answer-box { padding: 22px; }
    .fact-list { grid-template-columns: 1fr; }
    .fact-list dt { padding-bottom: 0; border-bottom: 0; }
    .fact-list dd { padding-top: 3px; }
    .metric-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .metric-strip div { padding: 15px; }
    .cta-band { align-items: stretch; flex-direction: column; }
    .button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
}