/* ============================================================
   /assets/site.css — 金赢会馆 共享样式
   0. 设计变量（定稿，勿改）
   ============================================================ */
:root {
  --color-surface: #fbfbfb;
  --color-surface-alt: #f2f2f2;
  --color-surface-deep: #e6e6e5;
  --color-ink: #4d4a42;
  --color-ink-soft: #726e64;
  --color-ink-muted: #878378;
  --color-line: #dcdbda;
  --color-primary: #8d7230;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #ece8df;
  --color-accent: #c6502f;
  --color-accent-ink: #ffffff;
  --color-highlight: #f1dcd6;
  --color-focus: #c94621;
  --color-contrast-surface: #1c1912;
  --color-contrast-ink: #e7e6e4;
  --color-contrast-line: #494640;
  --color-contrast-accent: #d26141;
  --overlay-scrim: linear-gradient(180deg, rgba(28, 25, 18, 0.35) 0%, rgba(28, 25, 18, 0.72) 55%, rgba(28, 25, 18, 0.92) 100%);
  --font-heading: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-body: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --text-xs: 10.7px;
  --text-sm: 13.4px;
  --text-base: 15px;
  --text-lg: 18.8px;
  --text-xl: 23.4px;
  --text-2xl: 29.3px;
  --text-3xl: 36.6px;
  --text-4xl: 45.8px;
  --text-display: clamp(34px, 5.9vw, 75px);
  --text-figure: clamp(28px, 4.2vw, 54px);
  --weight-heading: 680;
  --weight-body: 400;
  --leading-body: 1.79;
  --leading-heading: 1.27;
  --tracking-heading: 0.009em;
  --radius-sm: 14px;
  --radius-md: 17px;
  --radius-lg: 20px;
  --radius-pill: 999px;
  --border-thin: 1px;
  --border-thick: 1px;
  --shadow-1: 0 6px 18px rgba(77, 74, 66, 0.08);
  --shadow-2: 0 18px 44px rgba(77, 74, 66, 0.14);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1160px;
  --measure: 68ch;
  --gutter: 16px;
  --section-y: 87px;
  --section-y-lg: 122px;
}

/* ============================================================
   1. 重置与中文排版
   ============================================================ */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: inherit;
  word-break: break-word;
}

p { margin: 0; }
ul, ol { margin: 0; padding: 0; }
li { list-style: none; }
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; }
strong, b { font-weight: 700; }
small { font-size: var(--text-xs); }
hr { border: 0; }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

[hidden] { display: none !important; }

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 3px;
}

::selection {
  background: var(--color-primary-soft);
  color: var(--color-ink);
}

/* ============================================================
   2. 排版工具
   ============================================================ */
.t-lead {
  font-size: var(--text-lg);
  line-height: 1.7;
  color: var(--color-ink-soft);
}
.t-xl { font-size: var(--text-xl); }
.t-2xl { font-size: var(--text-2xl); }
.t-3xl { font-size: var(--text-3xl); }
.t-4xl { font-size: var(--text-4xl); }
.t-small { font-size: var(--text-sm); color: var(--color-ink-soft); }
.t-muted { font-size: var(--text-sm); color: var(--color-ink-muted); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.16em;
  color: color-mix(in srgb, var(--color-primary) 82%, var(--color-contrast-surface));
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--color-primary);
}
.eyebrow--light {
  color: var(--color-contrast-accent);
}
.eyebrow--light::before { background: var(--color-contrast-accent); }

.num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}
.num--figure {
  display: inline-block;
  font-size: var(--text-figure);
  line-height: 1;
}
.unit {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  margin-left: 4px;
  vertical-align: super;
  white-space: nowrap;
}

/* ============================================================
   3. 布局骨架
   ============================================================ */
.shell {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

.section { padding-block: var(--section-y); }
.section--tight { padding-block: var(--space-6); }
.section--lg { padding-block: var(--section-y-lg); }
.section--dark {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}
.section__title { font-size: var(--text-3xl); }
.section__aside { font-size: var(--text-sm); color: var(--color-ink-muted); }
.section--dark .section__aside { color: color-mix(in srgb, var(--color-contrast-ink) 68%, transparent); }

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
}
.span-2 { grid-column: span 2; }
.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-6 { grid-column: span 6; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.stack--sm { gap: var(--space-1); }
.stack--lg { gap: var(--space-4); }

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
}
.cluster--lg { gap: var(--space-2); }

/* ============================================================
   4. 按钮与链接
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 180ms ease, color 180ms ease,
              border-color 180ms ease, transform 180ms ease,
              box-shadow 180ms ease;
}

.btn--gold {
  background: var(--color-primary);
  color: var(--color-primary-ink);
  border-color: color-mix(in srgb, var(--color-primary) 78%, var(--color-contrast-surface));
  box-shadow: var(--shadow-1);
}
.btn--gold:hover {
  background: color-mix(in srgb, var(--color-primary) 86%, var(--color-contrast-surface));
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}

.btn--accent {
  background: var(--color-accent);
  color: var(--color-accent-ink);
  border-color: color-mix(in srgb, var(--color-accent) 76%, var(--color-contrast-surface));
  box-shadow: var(--shadow-1);
}
.btn--accent:hover {
  background: color-mix(in srgb, var(--color-accent) 86%, var(--color-contrast-surface));
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}

.btn--ghost {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-primary);
}
.btn--ghost:hover {
  background: var(--color-primary-soft);
  border-color: color-mix(in srgb, var(--color-primary) 80%, var(--color-contrast-surface));
}

.btn--dark {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-color: var(--color-contrast-line);
}
.btn--dark:hover {
  background: color-mix(in srgb, var(--color-contrast-surface) 78%, var(--color-primary));
  border-color: var(--color-contrast-accent);
}

.btn--sm {
  padding: 8px 14px;
  font-size: var(--text-xs);
}

.link-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--color-primary);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  transition: color 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}
.link-more::after { content: "→"; }
.link-more:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
  box-shadow: 0 1px 0 var(--color-accent);
}

.dot {
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 22%, transparent);
}

.dash-rule {
  height: 1px;
  margin: 0;
  border: 0;
  background-image: repeating-linear-gradient(90deg, var(--color-line) 0 8px, transparent 8px 16px);
}
.dash-rule--dark {
  background-image: repeating-linear-gradient(90deg, var(--color-contrast-line) 0 8px, transparent 8px 16px);
}

/* ============================================================
   5. Bento 模块块 / 徽标 / 工单 / 主题带
   ============================================================ */
.block {
  position: relative;
  min-width: 0;
  padding: var(--space-3);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
  transition: border-color 180ms ease, transform 180ms ease,
              box-shadow 180ms ease, background-color 180ms ease;
}
.block:hover {
  border-color: color-mix(in srgb, var(--color-primary) 68%, transparent);
}
.block--sm {
  padding: var(--space-2);
  border-radius: var(--radius-sm);
}
.block--flat {
  background: var(--color-surface);
  box-shadow: none;
}
.block--gold {
  background: var(--color-primary-soft);
  border-color: color-mix(in srgb, var(--color-primary) 55%, transparent);
}
.block--dark {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-color: var(--color-contrast-line);
}
.block--dark:hover {
  border-color: var(--color-contrast-accent);
}
.block--focus {
  background: var(--color-accent);
  color: var(--color-accent-ink);
  border-color: color-mix(in srgb, var(--color-accent) 70%, var(--color-contrast-surface));
  box-shadow: var(--shadow-2);
}
.block--focus:hover {
  transform: translateY(-2px);
  border-color: var(--color-accent-ink);
}
.block--link {
  display: block;
  text-decoration: none;
}
.block--link:hover { transform: translateY(-2px); box-shadow: var(--shadow-2); }

.block__title {
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1.4;
}
.block__text {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}
.block__meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}
.block__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: var(--text-xl);
  line-height: 1.2;
}
.block--dark .block__text { color: color-mix(in srgb, var(--color-contrast-ink) 78%, transparent); }
.block--dark .block__meta { color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent); }
.block--dark .block__title { color: var(--color-contrast-ink); }
.block--focus .block__text { color: color-mix(in srgb, var(--color-accent-ink) 88%, transparent); }
.block--focus .block__meta { color: color-mix(in srgb, var(--color-accent-ink) 78%, transparent); }
.block--focus .block__title { color: var(--color-accent-ink); }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid color-mix(in srgb, var(--color-primary) 58%, transparent);
  border-radius: var(--radius-pill);
  background: var(--color-primary-soft);
  color: color-mix(in srgb, var(--color-primary) 84%, var(--color-contrast-surface));
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.03em;
  white-space: nowrap;
  transition: background-color 180ms ease, color 180ms ease, border-color 180ms ease;
}
.chip:hover {
  background: var(--color-highlight);
  border-color: var(--color-accent);
  color: var(--color-accent);
}
.chip--accent {
  background: var(--color-highlight);
  border-color: color-mix(in srgb, var(--color-accent) 55%, transparent);
  color: var(--color-accent);
}
.chip--accent:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-ink);
}
.chip--dark {
  background: color-mix(in srgb, var(--color-contrast-ink) 10%, transparent);
  border-color: var(--color-contrast-line);
  color: var(--color-contrast-ink);
}
.chip--dark:hover {
  background: color-mix(in srgb, var(--color-contrast-accent) 20%, transparent);
  border-color: var(--color-contrast-accent);
  color: var(--color-contrast-accent);
}
.chip--muted {
  background: var(--color-surface-deep);
  border-color: var(--color-line);
  color: var(--color-ink-soft);
}

.ledger {
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}
.ledger__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) repeat(3, minmax(60px, 96px));
  gap: var(--space-2);
  padding: 10px var(--space-3);
  background: var(--color-surface-deep);
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-ink-soft);
}
.ledger__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) repeat(3, minmax(60px, 96px));
  gap: var(--space-2);
  align-items: center;
  padding: 12px var(--space-3);
  border-top: 1px solid var(--color-line);
  font-size: var(--text-sm);
  transition: background-color 180ms ease;
}
.ledger__row:hover { background: var(--color-primary-soft); }
.ledger__cell { min-width: 0; }
.ledger__cell--num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  text-align: right;
}
.ledger--dark {
  background: var(--color-contrast-surface);
  border-color: var(--color-contrast-line);
  color: var(--color-contrast-ink);
}
.ledger--dark .ledger__head {
  background: color-mix(in srgb, var(--color-contrast-surface) 74%, var(--color-contrast-ink));
  color: color-mix(in srgb, var(--color-contrast-ink) 72%, transparent);
}
.ledger--dark .ledger__row { border-top-color: var(--color-contrast-line); }
.ledger--dark .ledger__row:hover {
  background: color-mix(in srgb, var(--color-contrast-accent) 14%, transparent);
}

.band {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: var(--space-2);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface-alt);
}
.band__item {
  flex: 1 1 200px;
  min-width: 0;
  padding: var(--space-2);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  font-size: var(--text-sm);
  transition: border-color 180ms ease, background-color 180ms ease;
}
.band__item:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
}
.band__item--wide { flex: 2 1 320px; }
.band__item--narrow { flex: 1 1 140px; }
.band--dark {
  background: var(--color-contrast-surface);
  border-color: var(--color-contrast-line);
  color: var(--color-contrast-ink);
}
.band--dark .band__item {
  background: color-mix(in srgb, var(--color-contrast-surface) 76%, var(--color-contrast-ink));
  border-color: var(--color-contrast-line);
}
.band--dark .band__item:hover {
  border-color: var(--color-contrast-accent);
  background: color-mix(in srgb, var(--color-contrast-accent) 16%, var(--color-contrast-surface));
}

/* ============================================================
   6. 图片容器（展签式）
   ============================================================ */
.media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface-deep);
}
.media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--4-3 { aspect-ratio: 4 / 3; }
.media--3-2 { aspect-ratio: 3 / 2; }
.media--16-9 { aspect-ratio: 16 / 9; }
.media--1-1 { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }

.media__scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
  pointer-events: none;
}
.media__tag {
  position: absolute;
  left: var(--space-2);
  bottom: var(--space-2);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border: 1px solid var(--color-contrast-line);
  border-radius: var(--radius-pill);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.03em;
}
.media__tag--gold {
  background: var(--color-primary);
  border-color: color-mix(in srgb, var(--color-primary) 70%, var(--color-contrast-surface));
  color: var(--color-primary-ink);
}
.media__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: var(--space-3);
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
}

/* ============================================================
   7. 筛选条 / 面包屑 / 正文
   ============================================================ */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
}
.filter-chip {
  padding: 7px 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ink-soft);
  transition: background-color 180ms ease, color 180ms ease, border-color 180ms ease;
}
.filter-chip:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  color: var(--color-ink);
}
.filter-chip[aria-pressed="true"] {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-ink);
}

.breadcrumb { padding-top: var(--space-3); }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}
.breadcrumb__list li {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.breadcrumb__list li + li::before {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--color-line);
}
.breadcrumb__link {
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms ease, border-color 180ms ease;
}
.breadcrumb__link:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}
.breadcrumb__current {
  color: var(--color-ink);
  font-weight: 600;
}

.prose { max-width: var(--measure); }
.prose > * + * { margin-top: var(--space-3); }
.prose h2 { font-size: var(--text-2xl); }
.prose h3 { font-size: var(--text-xl); }
.prose p { color: var(--color-ink); }
.prose a {
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--color-primary);
  transition: color 180ms ease, border-color 180ms ease;
}
.prose a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}
.prose ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.prose ul li {
  position: relative;
  padding-left: 22px;
}
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 12px;
  height: 1px;
  background: var(--color-primary);
}
.prose__lead {
  font-size: var(--text-lg);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

/* ============================================================
   8. 站点头部
   ============================================================ */
.skip-link {
  position: fixed;
  top: var(--space-1);
  left: var(--space-1);
  z-index: 200;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform 180ms ease;
}
.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
  box-shadow: 0 1px 0 color-mix(in srgb, var(--color-surface-deep) 70%, transparent);
}
.site-header::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background-image: repeating-linear-gradient(90deg, var(--color-primary) 0 10px, transparent 10px 22px);
  opacity: 0.4;
  pointer-events: none;
}

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: color-mix(in srgb, var(--color-line) 65%, transparent);
  pointer-events: none;
}
.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 100%);
  transition: transform 120ms linear;
}

.header-shell {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-3);
  padding-block: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
}
.brand__link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.brand__mark {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: var(--color-primary-ink);
  border: 1px solid color-mix(in srgb, var(--color-primary) 80%, var(--color-contrast-surface));
  box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--color-primary-ink) 24%, transparent);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1;
}
.brand__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.brand__name {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1.1;
  letter-spacing: var(--tracking-heading);
  white-space: nowrap;
}
.brand__note {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  white-space: nowrap;
}
.brand__icp {
  padding: 3px 10px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-surface-alt);
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  white-space: nowrap;
}

.site-nav { justify-self: center; }
.nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav__link {
  position: relative;
  display: block;
  padding: 9px 12px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ink-soft);
  text-decoration: none;
  white-space: nowrap;
  transition: color 180ms ease, background-color 180ms ease, border-color 180ms ease;
}
.nav__link:hover {
  color: var(--color-ink);
  background: var(--color-primary-soft);
  border-color: color-mix(in srgb, var(--color-primary) 45%, transparent);
}
.nav__link[aria-current="page"] {
  color: var(--color-ink);
  background: var(--color-primary-soft);
  border-color: color-mix(in srgb, var(--color-primary) 58%, transparent);
}
.nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-accent);
}

.header-cta {
  display: flex;
  justify-content: flex-end;
}
.header-cta__btn { gap: var(--space-1); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-1);
  padding: 9px 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-surface-alt);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ink);
  transition: background-color 180ms ease, border-color 180ms ease;
}
.nav-toggle:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
}
.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}
.nav-toggle__bars span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--color-primary);
  transition: transform 180ms ease, opacity 180ms ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }
.nav-toggle__label { font-size: var(--text-sm); }

/* ============================================================
   9. 站点页脚（反色）
   ============================================================ */
.site-footer {
  margin-top: var(--section-y);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-top: 3px solid color-mix(in srgb, var(--color-primary) 70%, var(--color-contrast-surface));
}
.footer-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.7fr) minmax(0, 1.4fr);
  gap: var(--space-6);
  padding-block: var(--space-8) var(--space-4);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.footer-brand__mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: var(--space-1);
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1;
}
.footer-brand__name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.2;
  color: var(--color-contrast-ink);
}
.footer-brand__note {
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 70%, transparent);
}
.footer-brand__line {
  margin-top: var(--space-1);
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-contrast-line);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-contrast-accent);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
}
.footer-col {
  min-width: 0;
  padding-left: var(--space-3);
  border-left: 1px solid var(--color-contrast-line);
}
.footer-col__title {
  margin-bottom: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--color-contrast-accent);
}
.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col__link {
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms ease, border-color 180ms ease;
}
.footer-col__link:hover {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-accent);
}

.footer-contact {
  min-width: 0;
  padding-left: var(--space-3);
  border-left: 1px solid var(--color-contrast-line);
}
.copy-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  padding-block: 7px;
  border-bottom: 1px dashed var(--color-contrast-line);
}
.copy-row__key {
  min-width: 62px;
  font-size: var(--text-xs);
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent);
}
.copy-row__val {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-contrast-ink);
  word-break: break-all;
}
.copy-btn {
  padding: 3px 10px;
  border: 1px solid var(--color-contrast-line);
  border-radius: var(--radius-pill);
  color: var(--color-contrast-accent);
  font-size: var(--text-xs);
  font-weight: 600;
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease;
}
.copy-btn:hover {
  border-color: var(--color-contrast-accent);
  background: color-mix(in srgb, var(--color-contrast-accent) 18%, transparent);
}
.copy-btn.is-done {
  border-color: var(--color-contrast-accent);
  background: var(--color-contrast-accent);
  color: var(--color-contrast-surface);
}
.footer-contact__line {
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 78%, transparent);
}
.footer-contact__note {
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent);
}
.footer-contact__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: var(--space-2);
  padding: 8px 16px;
  border: 1px solid var(--color-contrast-accent);
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  color: var(--color-contrast-accent);
  transition: background-color 180ms ease, color 180ms ease, border-color 180ms ease;
}
.footer-contact__link:hover {
  background: var(--color-contrast-accent);
  border-color: var(--color-contrast-accent);
  color: var(--color-contrast-surface);
}

.footer-legal {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  margin-top: var(--space-2);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-contrast-line);
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 66%, transparent);
}
.footer-legal__copy {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.03em;
}
.footer-legal__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}
.footer-legal__link {
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 82%, transparent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms ease, border-color 180ms ease;
}
.footer-legal__link:hover {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-accent);
}

/* ============================================================
   10. 响应式
   ============================================================ */
@media (max-width: 1240px) {
  .brand__icp { display: none; }
}

@media (max-width: 1120px) {
  .header-shell {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "brand toggle"
      "cta cta"
      "nav nav";
    gap: 10px var(--space-2);
    padding-block: 12px 14px;
  }
  .brand { grid-area: brand; }
  .nav-toggle { grid-area: toggle; display: inline-flex; }
  .header-cta { grid-area: cta; }
  .header-cta__btn { width: 100%; }
  .site-nav { grid-area: nav; justify-self: stretch; }

  .site-nav {
    display: none;
    width: 100%;
    padding: var(--space-1);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-md);
    background: var(--color-surface-alt);
  }
  .site-nav[data-open] { display: block; }
  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }
  .nav__link {
    padding: 12px;
    font-size: var(--text-base);
  }
  .nav__link[aria-current="page"]::after { left: 12px; right: auto; width: 28px; }
}

@media (max-width: 1024px) {
  .span-3 { grid-column: span 6; }
  .span-4 { grid-column: span 6; }
  .span-8 { grid-column: span 12; }
  .section__title { font-size: var(--text-2xl); }

  .footer-shell {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
    gap: var(--space-4);
    padding-block: var(--space-6) var(--space-4);
  }
  .footer-contact {
    grid-column: 1 / -1;
    padding-left: 0;
    border-left: 0;
    padding-top: var(--space-3);
    border-top: 1px solid var(--color-contrast-line);
  }
}

@media (max-width: 720px) {
  .span-2, .span-3, .span-4, .span-6 { grid-column: span 12; }
  .section { padding-block: var(--space-6); }
  .section--lg { padding-block: var(--space-8); }
  .brand__note { display: none; }

  .ledger__head { display: none; }
  .ledger__row {
    grid-template-columns: minmax(0, 1fr) auto;
    row-gap: 6px;
  }

  .footer-shell { grid-template-columns: minmax(0, 1fr); }
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-col { padding-left: 0; border-left: 0; }
  .footer-col__list { flex-direction: column; }
  .footer-legal { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 420px) {
  .footer-cols { grid-template-columns: minmax(0, 1fr); }
  .copy-row__key { min-width: 0; }
}

/* ============================================================
   11. 降低动态效果
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .scroll-progress__bar { transition: none; }
}