/* /assets/site.css —— 38娱乐 共享样式表 */
:root {
  --color-surface: #fcfcfc;
  --color-surface-alt: #f2f2f2;
  --color-surface-deep: #e4e4e5;
  --color-ink: #31353a;
  --color-ink-soft: #596068;
  --color-ink-muted: #747c85;
  --color-line: #d7d8d9;
  --color-primary: #1374e2;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #dbe9f8;
  --color-accent: #478306;
  --color-accent-ink: #ffffff;
  --color-highlight: #dbe6d0;
  --color-focus: #428000;
  --color-contrast-surface: #0f1822;
  --color-contrast-ink: #e4e5e7;
  --color-contrast-line: #3e454d;
  --color-contrast-accent: #83f30c;
  --overlay-scrim: linear-gradient(180deg, rgba(15, 24, 34, 0.35) 0%, rgba(15, 24, 34, 0.72) 55%, rgba(15, 24, 34, 0.92) 100%);
  --font-heading: "Source Han Sans SC", "Noto Sans SC", SimHei, "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, Menlo, Consolas, monospace;
  --text-xs: 9.5px;
  --text-sm: 13.5px;
  --text-base: 16px;
  --text-lg: 22.6px;
  --text-xl: 32.0px;
  --text-2xl: 45.2px;
  --text-3xl: 64.0px;
  --text-4xl: 90.4px;
  --text-display: clamp(49px, 10.2vw, 130px);
  --text-figure: clamp(41px, 7.3vw, 94px);
  --weight-heading: 877;
  --weight-body: 400;
  --leading-body: 1.74;
  --leading-heading: 1.26;
  --tracking-heading: -0.013em;
  --radius-sm: 198px;
  --radius-md: 344px;
  --radius-lg: 491px;
  --radius-pill: 999px;
  --border-thin: 2px;
  --border-thick: 3px;
  --shadow-1: none;
  --shadow-2: none;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1140px;
  --measure: 69ch;
  --gutter: 24px;
  --section-y: 102px;
  --section-y-lg: 143px;
}

/* ---------- reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: 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;
  overflow-x: hidden;
}

img, svg, video { max-width: 100%; display: block; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; }
a { color: var(--color-primary); }

h1, h2, h3, h4, h5, h6, p, figure, blockquote { margin: 0; }

/* ---------- 中文排版与标题 ---------- */
h1, h2, h3, h4, h5, h6,
.heading-lg, .heading-sm, .section-title, .display {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

.display {
  font-size: var(--text-display);
  line-height: 0.94;
}

.figure {
  font-family: var(--font-mono);
  font-weight: var(--weight-heading);
  font-size: var(--text-figure);
  line-height: 0.9;
  letter-spacing: -0.04em;
  margin: 0;
  font-variant-numeric: tabular-nums;
}

.section-title {
  font-size: var(--text-2xl);
  margin: 0 0 var(--space-3);
  transform: skewX(-2deg);
  transform-origin: left center;
}

.heading-lg { font-size: var(--text-xl); margin: 0 0 var(--space-2); }
.heading-sm { font-size: var(--text-lg); margin: 0 0 var(--space-1); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-1);
}

.mono, .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.lede {
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  font-weight: var(--weight-body);
  max-width: var(--measure);
  color: var(--color-ink-soft);
}

.prose {
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}
.prose p { margin: 0 0 var(--space-2); }
.prose h2 {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  margin: var(--space-6) 0 var(--space-2);
}
.prose h3 {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  margin: var(--space-4) 0 var(--space-1);
}
.prose ul { margin: 0 0 var(--space-2); padding-left: 0; }
.prose li {
  position: relative;
  padding-left: var(--space-3);
  margin-bottom: var(--space-1);
}
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 10px;
  height: 10px;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 布局骨架 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

#main-content { display: block; }

.section { padding: var(--section-y) 0; }
.section--lg { padding: var(--section-y-lg) 0; }
.section--tight { padding: var(--space-8) 0; }

.grid {
  display: grid;
  grid-template-columns: repeat(11, minmax(0, 1fr));
  gap: var(--gutter);
}
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-11 { grid-column: span 11; }

.stack { display: grid; gap: var(--space-3); }
.stack--tight { gap: var(--space-2); }
.stack--loose { gap: var(--space-6); }

/* ---------- 分区配色（三原色分区 + 夜场深色） ---------- */
.zone { background: var(--zone-bg); color: var(--zone-ink); }

.zone--paper {
  --zone-bg: var(--color-surface);
  --zone-ink: var(--color-ink);
  --zone-line: var(--color-line);
  --zone-soft: var(--color-surface-alt);
  --zone-soft-ink: var(--color-ink-soft);
}
.zone--blue {
  --zone-bg: var(--color-primary);
  --zone-ink: var(--color-primary-ink);
  --zone-line: color-mix(in srgb, var(--color-primary-ink) 34%, transparent);
  --zone-soft: var(--color-primary-soft);
  --zone-soft-ink: var(--color-primary);
}
.zone--green {
  --zone-bg: var(--color-accent);
  --zone-ink: var(--color-accent-ink);
  --zone-line: color-mix(in srgb, var(--color-accent-ink) 34%, transparent);
  --zone-soft: var(--color-highlight);
  --zone-soft-ink: var(--color-accent);
}
.zone--night {
  --zone-bg: var(--color-contrast-surface);
  --zone-ink: var(--color-contrast-ink);
  --zone-line: var(--color-contrast-line);
  --zone-soft: color-mix(in srgb, var(--color-contrast-surface) 74%, var(--color-contrast-ink));
  --zone-soft-ink: var(--color-contrast-accent);
}

.zone--blue .lede,
.zone--green .lede,
.zone--night .lede { color: inherit; opacity: 0.86; }
.zone--blue .eyebrow,
.zone--green .eyebrow,
.zone--night .eyebrow { color: inherit; opacity: 0.7; }
.zone--blue .prose li::before,
.zone--green .prose li::before,
.zone--night .prose li::before { background: var(--color-contrast-accent); }

/* ---------- 几何构件 ---------- */
.orb {
  display: block;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
}
.orb--half { border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
.orb--accent { background: var(--color-accent); }
.orb--night { background: var(--color-contrast-surface); }

.dial {
  position: relative;
  border-radius: var(--radius-lg);
  border: var(--border-thick) solid var(--zone-line, var(--color-line));
  aspect-ratio: 1 / 1;
  overflow: hidden;
}
.dial__marker {
  position: absolute;
  left: 50%;
  top: 50%;
  width: var(--border-thick);
  height: 44%;
  background: var(--color-contrast-accent);
  transform-origin: 50% 100%;
  transform: translate(-50%, -100%) rotate(0deg);
  transition: transform 0.45s ease;
}

/* ---------- 档案夹 / 资料卡 / 字段行 ---------- */
.archive {
  border: var(--border-thick) solid var(--zone-line, var(--color-line));
  background: var(--zone-bg, var(--color-surface));
  color: var(--zone-ink, var(--color-ink));
}
.archive__head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-bottom: var(--border-thick) solid var(--zone-line, var(--color-line));
}
.archive__index {
  flex: 0 0 auto;
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-pill);
  background: var(--zone-soft, var(--color-surface-alt));
  color: var(--zone-soft-ink, var(--color-ink-soft));
  font-family: var(--font-mono);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  font-variant-numeric: tabular-nums;
}
.archive__title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  margin: 0;
}
.archive__body { padding: var(--space-3); }

.card {
  border: var(--border-thin) solid var(--zone-line, var(--color-line));
  background: color-mix(in srgb, var(--zone-bg, var(--color-surface)) 92%, var(--color-surface));
  color: var(--zone-ink, var(--color-ink));
  padding: var(--space-3);
  border-radius: 0;
}
.card--soft { background: var(--zone-soft, var(--color-surface-alt)); }
.card--deep {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-color: var(--color-contrast-line);
}
.card__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding-bottom: var(--space-1);
  margin-bottom: var(--space-2);
  border-bottom: var(--border-thin) solid var(--zone-line, var(--color-line));
}
.card__title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  margin: 0;
}

.field {
  display: grid;
  gap: 4px;
  padding: var(--space-2) 0;
  border-bottom: var(--border-thin) solid var(--zone-line, var(--color-line));
}
.field:last-child { border-bottom: 0; }
.field__name {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: inherit;
  opacity: 0.66;
}
.field__value {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
}

/* ---------- 标签 / 筛选 / 刻度 ---------- */
.tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.tag--accent { background: var(--color-highlight); color: var(--color-accent); }
.tag--night { background: var(--color-contrast-surface); color: var(--color-contrast-accent); }

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}
.chip {
  appearance: none;
  border: var(--border-thin) solid var(--zone-line, var(--color-line));
  background: transparent;
  color: inherit;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
}
.chip:hover { transform: translateX(2px); }
.chip[aria-pressed="true"] {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
}
.zone--night .chip[aria-pressed="true"],
.card--deep .chip[aria-pressed="true"] {
  background: var(--color-contrast-accent);
  border-color: var(--color-contrast-accent);
  color: var(--color-contrast-surface);
}

.ruler {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  width: 100%;
}
.ruler__seg {
  flex: 1 1 0;
  height: 10px;
  background: var(--color-surface-deep);
}
.ruler--tall .ruler__seg { height: 30px; }
.zone--night .ruler__seg,
.card--deep .ruler__seg { background: var(--color-contrast-line); }
.ruler__seg[data-on="true"] { background: var(--color-contrast-accent); }

/* ---------- 图像容器 ---------- */
.media {
  position: relative;
  overflow: hidden;
  display: block;
  background: var(--color-contrast-surface);
  border-radius: 0;
}
.media__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.media__scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
  pointer-events: none;
}
.media__body {
  position: absolute;
  inset: auto 0 0 0;
  padding: var(--space-4);
  color: var(--color-contrast-ink);
  z-index: 2;
}
.media__body .eyebrow { color: var(--color-contrast-ink); opacity: 0.72; }
.media--wide { aspect-ratio: 16 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 4 / 5; }
.media--dial { aspect-ratio: 1 / 1; border-radius: var(--radius-lg); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 12px 22px;
  border: var(--border-thick) solid transparent;
  border-radius: 0;
  background: var(--color-surface-alt);
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.18s ease, background-color 0.18s ease, color 0.18s ease;
}
.btn:hover { transform: translateX(2px); }
.btn--primary {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}
.btn--primary:hover {
  background: color-mix(in srgb, var(--color-primary) 78%, var(--color-contrast-surface));
}
.btn--accent {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}
.btn--accent:hover {
  background: color-mix(in srgb, var(--color-accent) 78%, var(--color-contrast-surface));
}
.btn--ghost {
  background: transparent;
  border-color: currentColor;
  color: inherit;
}
.btn--contrast {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}
.btn--contrast:hover {
  background: color-mix(in srgb, var(--color-contrast-surface) 82%, var(--color-contrast-accent));
}
.btn--pill { border-radius: var(--radius-pill); }

/* ---------- 面包屑 ---------- */
.breadcrumbs { padding: var(--space-3) 0 0; }
.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}
.breadcrumbs__item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  color: var(--color-ink-muted);
}
.breadcrumbs__item::after {
  content: "/";
  color: var(--color-ink-muted);
}
.breadcrumbs__item:last-child::after { content: ""; }
.breadcrumbs__link {
  color: var(--color-ink-soft);
  text-decoration: none;
}
.breadcrumbs__link:hover { color: var(--color-primary); }

/* ---------- 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--color-surface);
  border-bottom: var(--border-thick) solid var(--color-contrast-surface);
}
.site-header__bar { background: var(--color-surface); }
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  min-height: 88px;
  padding-top: var(--space-1);
  padding-bottom: var(--space-1);
}

.skip-link {
  position: absolute;
  left: var(--space-2);
  top: calc(-1 * var(--space-8));
  z-index: 120;
  padding: 10px 18px;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-weight: var(--weight-heading);
  text-decoration: none;
  transition: top 0.16s ease;
}
.skip-link:focus { top: var(--space-1); }

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-ink);
}
.site-brand__mark {
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-pill);
  border: var(--border-thick) solid var(--color-primary);
  background: var(--color-contrast-surface);
  position: relative;
}
.site-brand__mark::after {
  content: "";
  position: absolute;
  right: -1px;
  bottom: -1px;
  width: 14px;
  height: 14px;
  border-radius: var(--radius-pill);
  background: var(--color-contrast-accent);
}
.site-brand__text { display: grid; gap: 2px; }
.site-brand__name {
  display: inline-block;
  padding: 4px 12px 6px;
  background: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: 1.05;
  letter-spacing: -0.03em;
  transform: skewX(-2deg);
}
.site-brand__meta {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}
.site-brand__region {
  font-family: var(--font-mono);
  letter-spacing: 0.16em;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background: var(--color-highlight);
  color: var(--color-accent);
}
.site-brand__tagline { display: none; }

.site-nav { margin-left: auto; }
.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.site-nav__link {
  display: inline-block;
  padding: 8px 12px;
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
  text-decoration: none;
  border-bottom: var(--border-thick) solid transparent;
  transition: color 0.18s ease, background-color 0.18s ease, transform 0.18s ease;
}
.site-nav__link:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  transform: translateX(2px);
}
.site-nav__link[aria-current="page"] {
  background: var(--color-primary);
  color: var(--color-primary-ink);
  border-bottom-color: var(--color-ink);
}

.site-header__end {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.site-header__cta { white-space: nowrap; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-1);
  padding: 10px 14px;
  border: var(--border-thick) solid var(--color-ink);
  border-radius: 0;
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  cursor: pointer;
}
.nav-toggle__bars {
  position: relative;
  display: block;
  width: 20px;
  height: var(--border-thick);
  background: currentColor;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: var(--border-thick);
  background: currentColor;
}
.nav-toggle__bars::before { top: -7px; }
.nav-toggle__bars::after { top: 7px; }
.nav-toggle[aria-expanded="true"] { background: var(--color-contrast-surface); color: var(--color-contrast-ink); border-color: var(--color-contrast-surface); }

/* 左侧刻度尺 / 窄屏刻度条 */
.rail {
  display: none;
  background: var(--color-surface-alt);
  border-top: var(--border-thin) solid var(--color-line);
}
.rail[data-active="true"] { display: block; }
.rail__title {
  margin: var(--space-1) 0 0;
  padding: 0 var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}
.rail__list {
  display: flex;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3) var(--space-2);
  overflow-x: auto;
  scrollbar-width: thin;
}
.rail__item { flex: 0 0 auto; }
.rail__btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  white-space: nowrap;
  cursor: pointer;
  transition: color 0.18s ease, background-color 0.18s ease, border-color 0.18s ease;
}
.rail__btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.rail__btn[aria-current="true"] {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
}
.rail__num { font-weight: var(--weight-heading); }

/* 阅读进度 */
.progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: calc(-1 * var(--border-thick));
  height: var(--border-thick);
  overflow: hidden;
  pointer-events: none;
}
.progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--color-contrast-accent);
  transform: scaleX(0);
  transform-origin: left center;
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-top: var(--border-thick) solid var(--color-contrast-line);
  padding: var(--section-y-lg) 0 var(--space-4);
}
.site-footer__orb {
  position: absolute;
  pointer-events: none;
  border-radius: var(--radius-pill);
}
.site-footer__orb--full {
  width: 300px;
  height: 300px;
  right: -110px;
  top: -120px;
  background: color-mix(in srgb, var(--color-primary) 42%, transparent);
}
.site-footer__orb--half {
  width: 240px;
  height: 120px;
  left: -80px;
  bottom: 0;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  background: color-mix(in srgb, var(--color-accent) 46%, transparent);
}
.site-footer .container { position: relative; z-index: 2; }

.site-footer__big {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-4xl);
  line-height: 0.94;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
  margin: 0 0 var(--space-6);
  transform: skewX(-2deg);
  transform-origin: left center;
}
.site-footer__big::after {
  content: "";
  display: block;
  width: 128px;
  height: 10px;
  margin-top: var(--space-3);
  background: var(--color-contrast-accent);
  transform: skewX(2deg);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--gutter);
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}
.site-footer__title {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--color-contrast-ink) 58%, transparent);
  margin: 0 0 var(--space-2);
}
.site-footer__list { display: grid; gap: 2px; }
.site-footer__link {
  display: inline-block;
  padding: 6px 0;
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}
.site-footer__link:hover {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-accent);
  transform: translateX(2px);
}
.site-footer__line,
.site-footer__meta {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 78%, transparent);
  margin: 0 0 var(--space-1);
  max-width: var(--measure);
}
.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2) var(--space-3);
  margin-top: var(--space-6);
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}
.site-footer__legal .site-footer__meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: color-mix(in srgb, var(--color-contrast-ink) 52%, transparent);
  margin: 0;
}

/* ---------- 焦点与动效 ---------- */
:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 3px;
}
.site-footer :focus-visible,
.zone--night :focus-visible { outline-color: var(--color-contrast-accent); }

[data-reveal] { will-change: opacity, transform; }
html.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateX(-18px);
}
html.js-reveal [data-reveal].is-inview {
  opacity: 1;
  transform: none;
  transition: opacity 0.55s ease, transform 0.55s ease;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1120px) {
  .site-brand__tagline { display: none; }
}

@media (max-width: 960px) {
  .grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-11 { grid-column: span 6; }

  .nav-toggle { display: inline-flex; }
  .site-header__cta { display: none; }
  .site-header__inner { min-height: 72px; }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    margin-left: 0;
    display: none;
    background: var(--color-contrast-surface);
    border-top: var(--border-thick) solid var(--color-contrast-accent);
    padding: var(--space-2) var(--space-3) var(--space-3);
    max-height: 70vh;
    overflow-y: auto;
  }
  .site-nav[data-open="true"] { display: block; }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .site-nav__link {
    display: block;
    padding: 14px 0;
    color: var(--color-contrast-ink);
    font-size: var(--text-lg);
    border-bottom: var(--border-thin) solid var(--color-contrast-line);
    border-left: var(--border-thick) solid transparent;
    padding-left: var(--space-2);
  }
  .site-nav__link:hover {
    color: var(--color-contrast-accent);
    border-bottom-color: var(--color-contrast-line);
    border-left-color: var(--color-contrast-accent);
  }
  .site-nav__link[aria-current="page"] {
    background: transparent;
    color: var(--color-contrast-accent);
    border-bottom-color: var(--color-contrast-line);
    border-left-color: var(--color-contrast-accent);
  }

  .section { padding: var(--space-8) 0; }
  .section--lg { padding: var(--section-y) 0; }

  .archive__head { flex-wrap: wrap; gap: var(--space-2); }
  .archive__index { width: 52px; height: 52px; font-size: var(--text-base); }
  .archive__title { font-size: var(--text-lg); }

  .site-footer { padding: var(--space-8) 0 var(--space-3); }
  .site-footer__grid { grid-template-columns: 1fr; gap: var(--space-4); }
  .site-footer__big { margin-bottom: var(--space-4); }
  .site-footer__orb--full { width: 200px; height: 200px; right: -90px; top: -80px; }
}

@media (max-width: 620px) {
  .section-title { font-size: var(--text-xl); }
  .heading-lg { font-size: var(--text-lg); }
  .lede { font-size: var(--text-base); }
  .site-brand__name { font-size: var(--text-lg); padding: 3px 10px 5px; }
  .site-brand__mark { width: 30px; height: 30px; }
  .media__body { padding: var(--space-3); }
  .site-footer__legal { flex-direction: column; }
}

@media (min-width: 1440px) {
  .rail[data-active="true"] {
    position: fixed;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    width: 132px;
    display: block;
    background: transparent;
    border-top: 0;
    z-index: 40;
  }
  .rail__title {
    margin: 0 0 var(--space-1);
    padding: 0 0 var(--space-1);
    border-bottom: var(--border-thin) solid var(--color-line);
  }
  .rail__list {
    flex-direction: column;
    gap: 4px;
    padding: 0;
    overflow: visible;
  }
  .rail__item { width: 100%; }
  .rail__btn {
    width: 100%;
    justify-content: flex-start;
    text-align: left;
    border: 0;
    border-left: var(--border-thick) solid var(--color-line);
    border-radius: 0;
    padding: 6px 8px;
    white-space: normal;
  }
  .rail__btn:hover { border-left-color: var(--color-primary); }
  .rail__btn[aria-current="true"] {
    background: var(--color-primary-soft);
    border-left-color: var(--color-primary);
    color: var(--color-primary);
  }
}

@media (min-width: 961px) {
  .site-brand__tagline { display: inline; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  html.js-reveal [data-reveal] {
    opacity: 1;
    transform: none;
  }
  .btn:hover,
  .chip:hover,
  .site-nav__link:hover,
  .site-footer__link:hover { transform: none; }
  .site-brand__name,
  .section-title,
  .site-footer__big { transform: none; }
}