/* ============================================================
   合乐看台 · 共享样式 /assets/site.css
   变量 → 重置 → 排版 → 工具类 → 头部轨道 → 页脚 → 通用组件
   ============================================================ */

:root {
  /* 色彩 */
  --ink: #1B1712;
  --ink-2: #4A4238;
  --g-deep: #0B2B24;
  --g-field: #123F33;
  --g-turf: #2E6B4F;
  --lime: #D8F43C;
  --orange: #F26B2A;
  --white: #F7F8F4;
  --cream: #F3EBD8;
  --grey: #7D8A80;
  --grey-2: #A9B4AC;
  --red: #C83A2B;

  --line: color-mix(in srgb, var(--ink) 20%, transparent);
  --line-soft: color-mix(in srgb, var(--ink) 10%, transparent);
  --line-dark: color-mix(in srgb, #FFFFFF 22%, transparent);
  --line-dark-soft: color-mix(in srgb, #FFFFFF 11%, transparent);

  /* 字体 */
  --font-display: "Oswald", "Barlow Condensed", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-data: "IBM Plex Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 尺寸 */
  --rail-w: 88px;
  --rail-w-open: 248px;
  --bar-h: 58px;
  --maxw: 1280px;
  --pad: clamp(18px, 4vw, 32px);
  --gap: clamp(16px, 2vw, 24px);
  --panel-pad: clamp(20px, 3vw, 32px);

  --t: 150ms ease-out;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-block-start: calc(var(--bar-h) + 16px);
}

body,
h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd, ul, ol {
  margin: 0;
}

ul, ol { padding: 0; list-style: none; }

img, svg, video { display: block; max-width: 100%; }

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

a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, currentColor 50%, transparent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
  transition: text-decoration-color var(--t), text-decoration-thickness var(--t), color var(--t);
}

a:hover,
a:focus-visible {
  text-decoration-color: var(--lime);
  text-decoration-thickness: 2px;
}

.panel--paper a:hover,
.panel--paper a:focus-visible,
.panel--lime a:hover,
.panel--lime a:focus-visible,
.panel--light a:hover,
.panel--light a:focus-visible {
  text-decoration-color: var(--orange);
}

/* ---------- 基础排版 ---------- */
body {
  background: var(--white);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.015em;
}

h1 { font-size: clamp(2.125rem, 6vw, 5.5rem); }
h2 { font-size: clamp(1.625rem, 3.4vw, 2.75rem); }
h3 { font-size: clamp(1.25rem, 2.2vw, 1.75rem); }
h4 { font-size: clamp(1.0625rem, 1.4vw, 1.25rem); }

p { max-width: 72ch; }

::selection {
  background: var(--lime);
  color: var(--g-deep);
}

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

.panel--dark :focus-visible,
.panel--field :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--lime);
}

/* 外壳偏移：为固定轨道让位 */
@media (min-width: 1024px) {
  body { padding-inline-start: var(--rail-w); }
}

@media (max-width: 1023.98px) {
  body { padding-block-start: var(--bar-h); }
}

#main-content { display: block; }
#main-content:focus { outline: none; }

/* ---------- 工具类 ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}

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

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--g-turf);
}

.lamp {
  display: inline-block;
  width: 8px;
  height: 8px;
  flex: 0 0 8px;
  background: var(--g-turf);
}

.lamp--live { background: var(--orange); }
.lamp--lime { background: var(--lime); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border: 1px solid currentColor;
  font-family: var(--font-data);
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: 0.08em;
  color: var(--g-turf);
  white-space: nowrap;
}

.tag--lime { background: var(--lime); border-color: var(--lime); color: var(--g-deep); }
.tag--orange { color: var(--orange); }
.tag--red { color: var(--red); }

/* ---------- 跳过链接 ---------- */
.skip-link {
  position: fixed;
  inset-block-start: 8px;
  inset-inline-start: 8px;
  z-index: 300;
  padding: 10px 18px;
  background: var(--lime);
  color: var(--g-deep);
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  border: 1px solid var(--g-deep);
  transform: translateY(-220%);
  transition: transform 160ms ease-out;
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline: 3px solid var(--orange);
  outline-offset: 2px;
}

@media (min-width: 1024px) {
  .skip-link { inset-inline-start: calc(var(--rail-w) + 12px); }
}

/* ---------- 头部 · 侧边轨道 ---------- */
.site-header {
  position: fixed;
  inset-block-start: 0;
  inset-inline-start: 0;
  z-index: 100;
}

.rail {
  position: fixed;
  inset-block: 0;
  inset-inline-start: 0;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px 12px 18px;
  background: var(--g-deep);
  color: var(--white);
  border-inline-end: 1px solid var(--line-dark);
  overflow: hidden;
  transition: width 180ms ease-out;
  z-index: 120;
}

.rail:hover,
.rail:focus-within {
  width: var(--rail-w-open);
}

.rail__brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 4px 8px 14px;
  border-block-end: 1px solid var(--line-dark);
  text-decoration: none;
  flex: 0 0 auto;
}

.rail__brand:hover,
.rail__brand:focus-visible { text-decoration: none; }

.rail__mark {
  display: grid;
  place-items: center;
  flex: 0 0 36px;
  width: 36px;
  height: 36px;
  background: var(--lime);
  color: var(--g-deep);
  border: 1px solid var(--lime);
  transition: background var(--t), color var(--t);
}

.rail__brand:hover .rail__mark,
.rail__brand:focus-visible .rail__mark {
  background: var(--g-deep);
  color: var(--lime);
  border-color: var(--lime);
}

.rail__brandtext {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  opacity: 0;
  transition: opacity 120ms ease-out;
}

.rail:hover .rail__brandtext,
.rail:focus-within .rail__brandtext { opacity: 1; }

.rail__name {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 900;
  letter-spacing: 0.02em;
  line-height: 1.1;
  white-space: nowrap;
}

.rail__tagline {
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--grey-2);
  white-space: nowrap;
}

.rail__nav {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  margin-inline: -12px;
  padding: 10px 12px;
  scrollbar-width: thin;
  scrollbar-color: var(--g-field) transparent;
}

.rail__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.rail__item { display: block; }

.rail__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 10px;
  border-inline-start: 2px solid transparent;
  color: var(--grey-2);
  text-decoration: none;
  transition: background var(--t), color var(--t), border-color var(--t);
}

.rail__link:hover,
.rail__link:focus-visible {
  background: var(--g-field);
  color: var(--white);
  border-inline-start-color: var(--lime);
  text-decoration: none;
}

.rail__link[aria-current="page"] {
  color: var(--lime);
  border-inline-start-color: var(--lime);
  background: color-mix(in srgb, var(--g-field) 65%, transparent);
}

.rail__idx {
  flex: 0 0 22px;
  width: 22px;
  text-align: center;
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  opacity: 0.85;
}

.rail__label {
  flex: 0 0 auto;
  max-width: 0;
  overflow: hidden;
  opacity: 0;
  white-space: nowrap;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: max-width 180ms ease-out, opacity 120ms ease-out;
}

.rail:hover .rail__label,
.rail:focus-within .rail__label {
  max-width: 200px;
  opacity: 1;
}

.rail__foot {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-block-start: 12px;
  border-block-start: 1px solid var(--line-dark);
}

@media (min-width: 1024px) {
  .rail__foot {
    opacity: 0;
    pointer-events: none;
    transition: opacity 140ms ease-out 60ms;
  }
  .rail:hover .rail__foot,
  .rail:focus-within .rail__foot {
    opacity: 1;
    pointer-events: auto;
  }
}

.sync-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--grey-2);
  white-space: nowrap;
}

.sync-chip__lamp {
  flex: 0 0 7px;
  width: 7px;
  height: 7px;
  background: var(--orange);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--orange) 22%, transparent);
}

.rail__cta {
  width: 100%;
  justify-content: center;
  white-space: nowrap;
  font-size: 12px;
  padding: 10px 12px;
}

/* 移动端切换按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 8px 11px;
  border: 1px solid var(--line-dark);
  background: var(--g-field);
  color: var(--white);
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  transition: background var(--t), color var(--t), border-color var(--t);
}

.nav-toggle:hover { border-color: var(--lime); color: var(--lime); }

.nav-toggle[aria-expanded="true"] {
  background: var(--lime);
  color: var(--g-deep);
  border-color: var(--lime);
}

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  width: 100%;
  background: currentColor;
  transition: transform 160ms ease-out, opacity 120ms ease-out;
}

.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__text { line-height: 1; }

/* 移动遮罩 */
.rail__scrim {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: color-mix(in srgb, var(--g-deep) 68%, transparent);
  opacity: 0;
  visibility: hidden;
  transition: opacity 180ms ease-out, visibility 180ms;
}

@media (min-width: 1024px) {
  .rail__scrim { display: none; }
}

.site-header[data-open] .rail__scrim {
  opacity: 1;
  visibility: visible;
}

/* 顶部滚动进度条 */
.scroll-meter {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  height: 3px;
  z-index: 150;
  background: color-mix(in srgb, var(--g-deep) 55%, transparent);
  pointer-events: none;
}

.scroll-meter__bar {
  display: block;
  height: 100%;
  width: 100%;
  background: var(--lime);
  transform: scaleX(0);
  transform-origin: 0 50%;
}

/* ---------- 头部 · 移动端形态 ---------- */
@media (max-width: 1023.98px) {
  .site-header {
    inset-inline: 0;
    inset-block-start: 0;
    height: var(--bar-h);
  }

  .rail {
    inset: 0;
    width: 100%;
    height: var(--bar-h);
    flex-direction: row;
    align-items: center;
    gap: 10px;
    padding: 0 14px;
    border-inline-end: 0;
    border-block-end: 1px solid var(--line-dark);
    transition: none;
  }

  .rail:hover,
  .rail:focus-within { width: 100%; }

  .rail__brand {
    flex: 1 1 auto;
    min-width: 0;
    padding: 0;
    border-block-end: 0;
    gap: 10px;
  }

  .rail__mark { flex-basis: 32px; width: 32px; height: 32px; }

  .rail__brandtext { opacity: 1; }
  .rail__name { font-size: 16px; }
  .rail__tagline { display: none; }

  .rail__nav {
    position: fixed;
    inset-block-start: var(--bar-h);
    inset-inline: 0;
    height: calc(100dvh - var(--bar-h));
    margin: 0;
    padding: 16px 16px 40px;
    flex: 0 0 auto;
    background: var(--g-deep);
    border-block-start: 1px solid var(--line-dark);
    overflow-y: auto;
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 180ms ease-out, transform 180ms ease-out, visibility 180ms;
    z-index: 110;
  }

  .site-header[data-open] .rail__nav {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .rail__list { gap: 4px; }

  .rail__link {
    padding: 15px 12px;
    border-inline-start-width: 3px;
    font-size: 16px;
  }

  .rail__idx { flex-basis: 26px; width: 26px; font-size: 13px; }

  .rail__label {
    max-width: none;
    opacity: 1;
    overflow: visible;
    font-size: 16px;
  }

  .rail__foot {
    flex-direction: row;
    align-items: center;
    gap: 8px;
    margin: 0;
    padding: 0;
    border: 0;
    flex: 0 0 auto;
    opacity: 1;
    pointer-events: auto;
  }

  .sync-chip { font-size: 10px; letter-spacing: 0.04em; gap: 6px; }
  .rail__cta { display: none; }

  .nav-toggle { display: inline-flex; }
}

@media (max-width: 359.98px) {
  .sync-chip__text { display: none; }
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  background: var(--g-deep);
  color: var(--white);
  padding: clamp(34px, 5vw, 64px) var(--pad) 0;
  margin-block-start: clamp(48px, 7vw, 96px);
  border-block-start: 1px solid var(--line-dark);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset-block-start: 0;
  inset-inline: 0;
  height: 4px;
  background: linear-gradient(
    90deg,
    var(--lime) 0 18%,
    var(--orange) 18% 24%,
    var(--g-field) 24% 100%
  );
}

.footer__top {
  max-width: var(--maxw);
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 4vw, 56px);
  padding-block-end: clamp(28px, 4vw, 48px);
}

@media (min-width: 900px) {
  .footer__top {
    grid-template-columns: minmax(280px, 4fr) 7fr;
    gap: clamp(40px, 6vw, 88px);
  }
}

.footer__brandblock { min-width: 0; }

.footer__eyebrow {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--lime);
  margin-block-end: 14px;
}

.footer__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 20px;
  padding-inline: 5px;
  font-family: var(--font-data);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  border: 1px solid var(--line-dark);
  color: var(--lime);
}

.footer__brand {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--white);
}

.footer__line {
  margin-block-start: 10px;
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: 0.09em;
  color: var(--grey-2);
}

.footer__contact {
  display: grid;
  gap: 9px;
  margin-block: 20px 16px;
  padding-block: 16px;
  border-block: 1px solid var(--line-dark-soft);
}

.footer__contact li {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 10px;
  align-items: baseline;
}

.footer__key {
  font-family: var(--font-data);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--grey);
}

.footer__val {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  color: var(--white);
  word-break: break-word;
}

.footer__val--text {
  font-family: var(--font-body);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--grey-2);
}

.footer__note {
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--grey-2);
  max-width: 44ch;
}

.footer__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 32px);
  align-content: start;
}

@media (max-width: 560px) {
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

.footer__col { min-width: 0; }

.footer__title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.06em;
  line-height: 1.2;
  color: var(--white);
  padding-block-end: 10px;
  border-block-end: 1px solid var(--line-dark);
  margin-block-end: 14px;
}

.footer__links li + li { margin-block-start: 9px; }

.footer__links a {
  font-size: 14px;
  color: var(--grey-2);
  text-decoration: none;
  transition: color var(--t);
}

.footer__links a:hover,
.footer__links a:focus-visible {
  color: var(--lime);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-decoration-color: var(--lime);
  text-underline-offset: 0.24em;
}

.footer__links a[aria-current="page"] {
  color: var(--lime);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.24em;
}

.footer__bottom {
  max-width: var(--maxw);
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-block: 16px 22px;
  border-block-start: 1px solid var(--line-dark);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--grey-2);
}

.footer__copy { max-width: none; }
.footer__icp { color: var(--grey); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border: 1px solid var(--ink);
  border-radius: 0;
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: transform 120ms ease-out, background var(--t), color var(--t),
              border-color var(--t), box-shadow 120ms ease-out;
}

.btn:hover,
.btn:focus-visible { text-decoration: none; }

.btn:active {
  transform: translateY(1px);
  box-shadow: none;
}

.btn--lime {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--g-deep);
}

.btn--lime:hover,
.btn--lime:focus-visible {
  background: var(--white);
  border-color: var(--white);
  color: var(--g-deep);
}

.btn--solid {
  background: var(--g-deep);
  border-color: var(--g-deep);
  color: var(--white);
}

.btn--solid:hover,
.btn--solid:focus-visible {
  background: var(--g-field);
  border-color: var(--lime);
  color: var(--lime);
}

.btn--ghost {
  background: transparent;
  border-color: color-mix(in srgb, var(--ink) 35%, transparent);
  color: var(--ink);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background: var(--cream);
  border-color: var(--ink);
  color: var(--ink);
}

.btn--ghost-light {
  background: transparent;
  border-color: var(--line-dark);
  color: var(--white);
}

.btn--ghost-light:hover,
.btn--ghost-light:focus-visible {
  border-color: var(--lime);
  color: var(--lime);
}

/* ---------- 堆叠面板 ---------- */
.panel {
  position: relative;
  padding: var(--panel-pad);
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--white);
  color: var(--ink);
}

.panel--dark { background: var(--g-deep); color: var(--white); border-color: var(--line-dark); }
.panel--field { background: var(--g-field); color: var(--white); border-color: var(--line-dark); }
.panel--paper { background: var(--cream); color: var(--ink); border-color: var(--line); }
.panel--lime { background: var(--lime); color: var(--g-deep); border-color: var(--g-deep); }

.panel__head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 12px;
  padding-block-end: 12px;
  margin-block-end: 16px;
  border-block-end: 1px solid var(--line);
}

.panel--dark .panel__head,
.panel--field .panel__head { border-block-end-color: var(--line-dark); }
.panel--lime .panel__head { border-block-end-color: color-mix(in srgb, var(--g-deep) 30%, transparent); }

.panel__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 26px;
  height: 22px;
  padding-inline: 6px;
  background: var(--g-field);
  color: var(--lime);
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1;
}

.panel--dark .panel__num,
.panel--field .panel__num { background: var(--lime); color: var(--g-deep); }
.panel--paper .panel__num { background: var(--ink); color: var(--cream); }
.panel--lime .panel__num { background: var(--g-deep); color: var(--lime); }

.panel__title {
  font-family: var(--font-display);
  font-size: clamp(1.375rem, 2.6vw, 1.875rem);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.05;
}

.panel--dark .panel__title,
.panel--field .panel__title { color: var(--white); }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  padding-block: 12px;
  border-block-end: 1px solid var(--line);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--grey);
}

.breadcrumb li { display: inline-flex; align-items: center; gap: 6px; }

.breadcrumb li:not(:last-child)::after {
  content: "/";
  color: var(--grey);
  opacity: 0.7;
}

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

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--g-turf);
  text-decoration: underline;
  text-decoration-thickness: 2px;
}

.breadcrumb [aria-current="page"] { color: var(--ink); font-weight: 700; }

/* ---------- 正文容器 ---------- */
.prose {
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.8;
}

.prose > * + * { margin-block-start: 1.05em; }

.prose h2 {
  margin-block-start: 1.7em;
  font-size: clamp(1.5rem, 3vw, 2.125rem);
  letter-spacing: -0.01em;
}

.prose h3 {
  margin-block-start: 1.4em;
  font-size: clamp(1.1875rem, 2.1vw, 1.5rem);
}

.prose ul, .prose ol { padding-inline-start: 1.25em; }
.prose ul { list-style: square; }
.prose ol { list-style: decimal; }
.prose li + li { margin-block-start: 0.4em; }

.prose blockquote {
  padding-inline-start: 18px;
  border-inline-start: 3px solid var(--lime);
  font-size: 1.0625rem;
  color: var(--ink-2);
}

.prose code {
  font-family: var(--font-data);
  font-size: 0.9em;
  background: var(--cream);
  padding: 1px 5px;
  border: 1px solid var(--line-soft);
}

/* ---------- 图片容器基础规则 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--g-field);
  border: 1px solid var(--line);
  border-radius: 0;
}

.media img,
.media iframe,
.media svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media img { filter: saturate(0.96) contrast(1.04); }

.media--wide { aspect-ratio: 21 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 4 / 5; }
.media--portrait { aspect-ratio: 3 / 4; }

.media figcaption {
  position: absolute;
  inset-block-end: 0;
  inset-inline: 0;
  padding: 8px 12px;
  background: color-mix(in srgb, var(--g-deep) 84%, transparent);
  color: var(--white);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.06em;
  line-height: 1.5;
}

/* ---------- 无障碍与动效降级 ---------- */
@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;
    transition-delay: 0ms !important;
    scroll-behavior: auto !important;
  }

  .btn:active { transform: none; }
  .rail__nav { transform: none !important; }
}