/* =====================================================================
   site.css — 乐竞体育 共享外壳（/assets/site.css）
   深海蓝数据看板 · 左侧轨道导航 · 纸色面板 · 红黄牌语义
   ===================================================================== */

/* ---------- 1. 变量 ---------- */
:root {
  --ink-950: #04121C;
  --ink-900: #061826;
  --ink-800: #0C2639;
  --ink-700: #102F45;
  --line: #1E4059;
  --line-soft: rgba(30, 64, 89, 0.6);
  --paper: #F3EEE2;
  --paper-dim: #D9D2C2;
  --text: #101820;
  --cyan: #35E2D2;
  --orange: #FF7A2F;
  --red: #E23A45;
  --yellow: #F2C230;
  --muted: #8FA8BB;
  --coast: #1B6F78;

  --font-display: "Barlow Condensed", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --rail-w: 240px;
  --topbar-h: 60px;
  --maxw: 1240px;
  --pad: clamp(16px, 3.2vw, 44px);
  --radius: 3px;
  --ease: cubic-bezier(0.4, 0.1, 0.2, 1);
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  padding-left: var(--rail-w);
  padding-top: var(--topbar-h);
  min-height: 100vh;
  background-color: var(--ink-900);
  background-image:
    radial-gradient(120% 80% at 84% -12%, rgba(27, 111, 120, 0.30), transparent 60%),
    radial-gradient(90% 60% at 6% 0%, rgba(53, 226, 210, 0.07), transparent 55%);
  background-attachment: fixed;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: 0.01em;
  margin: 0 0 0.5em;
}

h1 { font-size: clamp(34px, 5.4vw, 64px); }
h2 { font-size: clamp(24px, 3.2vw, 40px); }
h3 { font-size: clamp(19px, 2.2vw, 26px); }
h4 { font-size: clamp(16px, 1.6vw, 19px); }

p { margin: 0 0 1em; }

a { color: var(--cyan); }

img { display: block; max-width: 100%; height: auto; }

ul, ol { padding-left: 1.2em; }

button { font: inherit; }

main { display: block; }

::selection { background: rgba(53, 226, 210, 0.3); color: var(--paper); }

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

/* ---------- 3. 跳转入口 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--paper);
  color: var(--text);
  border-radius: var(--radius);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform 0.2s var(--ease);
}

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

/* ---------- 4. 页头外壳 ---------- */
.site-header {
  position: fixed;
  inset: 0;
  z-index: 60;
  pointer-events: none;
}

.site-header > * { pointer-events: auto; }

/* 4.1 左侧轨道 */
.rail {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 2;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 24px 18px 22px;
  background-color: var(--ink-800);
  background-image: linear-gradient(180deg, rgba(27, 111, 120, 0.18), rgba(12, 38, 57, 0) 44%);
  border-right: 1px solid var(--line);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.brand {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  align-items: center;
  gap: 4px 12px;
  color: var(--paper);
  text-decoration: none;
}

.brand__mark {
  grid-row: 1 / span 2;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(53, 226, 210, 0.5);
  border-radius: var(--radius);
  background: rgba(53, 226, 210, 0.08);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.brand__name {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.02em;
}

.brand__line {
  font-size: 11px;
  line-height: 1.4;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.rail__nav { margin-top: 4px; }

.rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.rail__item { display: block; }

.rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px;
  border-left: 2px solid transparent;
  color: rgba(243, 238, 226, 0.72);
  font-size: 15px;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.rail__link:hover {
  color: var(--paper);
  background-color: rgba(53, 226, 210, 0.06);
  border-left-color: rgba(53, 226, 210, 0.42);
}

.rail__link[aria-current="page"] {
  color: var(--paper);
  background-color: rgba(53, 226, 210, 0.1);
  border-left-color: var(--cyan);
}

.rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.rail__link[aria-current="page"] .rail__num { color: var(--cyan); }

.rail__foot {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.rail__label {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.rail__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(243, 238, 226, 0.84);
}

/* 4.2 顶部横条 */
.topbar {
  position: absolute;
  top: 0;
  left: var(--rail-w);
  right: 0;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 clamp(16px, 2.4vw, 32px);
  background-color: rgba(6, 24, 38, 0.88);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.topbar__status {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 226, 210, 0.14);
  animation: pulse-dot 2.6s var(--ease) infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 0.35; transform: scale(0.82); }
  50% { opacity: 1; transform: scale(1); }
}

.topbar__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.panel-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border: 1px solid rgba(53, 226, 210, 0.45);
  border-radius: var(--radius);
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.panel-link:hover {
  background-color: rgba(53, 226, 210, 0.12);
  border-color: var(--cyan);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--paper);
  font-size: 12px;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

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

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 1px;
  background: var(--cyan);
  transition: background-color 0.2s var(--ease);
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 1px;
  background: var(--cyan);
  transition: transform 0.2s var(--ease);
}

.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }

.site-header[data-open] .nav-toggle__bars { background: transparent; }
.site-header[data-open] .nav-toggle__bars::before { transform: translateY(5px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars::after { transform: translateY(-5px) rotate(-45deg); }

.nav-toggle__label { font-family: var(--font-mono); }

/* 4.3 滚动进度细线 */
.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 2px;
  width: 0;
  max-width: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  pointer-events: none;
  transition: width 0.12s linear;
}

/* 4.4 抽屉遮罩 */
.site-header__scrim {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: rgba(3, 12, 20, 0.64);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s var(--ease), visibility 0.25s var(--ease);
}

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

/* ---------- 5. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  background-color: var(--ink-800);
  background-image: linear-gradient(180deg, var(--ink-900), var(--ink-800) 58%, #0A2033);
  border-top: 1px solid var(--line);
  color: rgba(243, 238, 226, 0.82);
  overflow: hidden;
}

.footer-inner {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(34px, 5vw, 64px) var(--pad) clamp(20px, 3vw, 32px);
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.9fr) minmax(0, 0.9fr) minmax(0, 1.5fr);
  gap: clamp(24px, 3vw, 44px);
}

.footer-brand__name {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.footer-brand__line {
  margin: 0 0 8px;
  max-width: 32ch;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

.footer-col { min-width: 0; }

.footer-col__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.footer-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-list--contact { gap: 12px; }

.footer-link {
  color: rgba(243, 238, 226, 0.78);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.footer-link:hover { color: var(--cyan); }

.footer-contact__item {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: 13px;
  line-height: 1.7;
}

.footer-contact__label {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.footer-contact__value {
  color: rgba(243, 238, 226, 0.88);
  overflow-wrap: anywhere;
}

.footer-meta {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 16px var(--pad) 28px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
}

.footer-meta__line {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.footer-coast {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--coast), rgba(53, 226, 210, 0.55) 46%, rgba(255, 122, 47, 0.45) 78%, transparent);
}

/* ---------- 6. 版式容器 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.section { padding-block: clamp(40px, 6vw, 88px); }
.section--tight { padding-block: clamp(24px, 3.4vw, 48px); }

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px 24px;
  margin-bottom: clamp(20px, 2.6vw, 36px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.section__title {
  margin: 0;
  font-size: clamp(22px, 2.8vw, 34px);
}

.section__note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.lede {
  max-width: 64ch;
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.8;
  color: rgba(243, 238, 226, 0.86);
}

.prose { max-width: 70ch; }
.prose p { margin: 0 0 1.25em; }

.rule {
  height: 1px;
  margin: clamp(24px, 3vw, 40px) 0;
  border: 0;
  background: var(--line);
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.btn--primary {
  background: var(--orange);
  border-color: var(--orange);
  color: #160B03;
}

.btn--primary:hover {
  background: #FF8F4E;
  border-color: #FF8F4E;
  transform: translateY(-1px);
}

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

.btn--ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.btn--outline {
  background: transparent;
  border-color: rgba(53, 226, 210, 0.5);
  color: var(--cyan);
}

.btn--outline:hover {
  background: rgba(53, 226, 210, 0.12);
  border-color: var(--cyan);
}

.btn--dark {
  background: var(--ink-900);
  border-color: var(--ink-900);
  color: var(--paper);
}

.btn--dark:hover {
  background: var(--ink-800);
  border-color: var(--cyan);
  color: var(--cyan);
}

.btn--sm {
  padding: 8px 14px;
  font-size: 12px;
  letter-spacing: 0.1em;
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 8. 标签 / 状态 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(6, 24, 38, 0.5);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
  white-space: nowrap;
}

.tag--cyan {
  color: var(--cyan);
  border-color: rgba(53, 226, 210, 0.5);
  background: rgba(53, 226, 210, 0.1);
}

.tag--orange {
  color: var(--orange);
  border-color: rgba(255, 122, 47, 0.5);
  background: rgba(255, 122, 47, 0.1);
}

.tag--red {
  color: var(--red);
  border-color: rgba(226, 58, 69, 0.55);
  background: rgba(226, 58, 69, 0.12);
}

.tag--yellow {
  color: var(--yellow);
  border-color: rgba(242, 194, 48, 0.5);
  background: rgba(242, 194, 48, 0.1);
}

.tag--paper {
  color: var(--text);
  border-color: rgba(16, 24, 32, 0.14);
  background: var(--paper);
}

/* ---------- 9. 面板与卡片 ---------- */
.panel {
  background: var(--paper);
  color: var(--text);
  border: 1px solid rgba(16, 24, 32, 0.1);
  border-radius: var(--radius);
  padding: clamp(18px, 2.4vw, 30px);
  box-shadow: 0 26px 50px -40px rgba(0, 0, 0, 0.9);
}

.panel--dark {
  background: var(--ink-800);
  color: var(--paper);
  border-color: var(--line);
  box-shadow: none;
}

.panel--flush { padding: 0; }

.panel__title {
  margin: 0 0 10px;
  font-size: clamp(20px, 2.2vw, 28px);
}

.panel__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: #4A5560;
}

.panel--dark .panel__note { color: var(--muted); }

.card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--ink-800);
  background-image: linear-gradient(180deg, rgba(16, 47, 69, 0.9), rgba(6, 24, 38, 0.95));
  padding: clamp(16px, 2vw, 24px);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.card:hover {
  transform: translateY(-3px);
  border-color: rgba(53, 226, 210, 0.45);
  box-shadow: 0 30px 44px -34px rgba(53, 226, 210, 0.6);
}

.card--paper {
  background-color: var(--paper);
  background-image: none;
  color: var(--text);
  border-color: rgba(16, 24, 32, 0.12);
}

.card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 14px;
  margin-bottom: 12px;
}

.card__title {
  margin: 0;
  font-size: clamp(18px, 2vw, 24px);
  color: inherit;
}

.card__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.card--paper .card__meta { color: #5A6470; }

.card__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(243, 238, 226, 0.82);
}

.card--paper .card__body { color: #26313C; }

.card__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 16px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.card--paper .card__foot { border-top-color: rgba(16, 24, 32, 0.12); }

/* ---------- 10. 等宽数据 ---------- */
.data-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.data-num--xl { font-size: clamp(42px, 7vw, 88px); }
.data-num--lg { font-size: clamp(30px, 4vw, 52px); }
.data-num--md { font-size: clamp(22px, 2.6vw, 34px); }

.data-num--cyan { color: var(--cyan); }
.data-num--orange { color: var(--orange); }
.data-num--red { color: var(--red); }
.data-num--yellow { color: var(--yellow); }

.data-unit {
  margin-left: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

/* ---------- 11. 网格与排版工具 ---------- */
.grid {
  display: grid;
  gap: clamp(16px, 2.2vw, 28px);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); }
.grid--aside { grid-template-columns: minmax(0, 1fr) minmax(0, 0.62fr); }

.stack {
  display: flex;
  flex-direction: column;
  gap: clamp(12px, 1.6vw, 20px);
}

.stack--tight { gap: 10px; }

.meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.list-plain {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.link-inline {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.28em;
  transition: color 0.18s var(--ease);
}

.link-inline:hover { color: var(--orange); }

/* ---------- 12. 图片容器 ---------- */
.figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--ink-800);
  background-image: linear-gradient(150deg, rgba(27, 111, 120, 0.55), rgba(6, 24, 38, 0.95) 66%);
  aspect-ratio: 16 / 9;
}

.figure__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.figure__bar {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 14px;
  padding: 9px 12px;
  background: linear-gradient(180deg, rgba(6, 24, 38, 0), rgba(6, 24, 38, 0.9));
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--paper);
}

.figure__caption {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.figure--wide { aspect-ratio: 21 / 9; }
.figure--square { aspect-ratio: 1 / 1; }
.figure--portrait { aspect-ratio: 4 / 5; }
.figure--fill { aspect-ratio: auto; min-height: 220px; }

/* ---------- 13. 面包屑 ---------- */
.breadcrumb { margin: 0 0 clamp(18px, 2.4vw, 28px); }

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.breadcrumb__item { display: inline-flex; align-items: center; gap: 8px; }

.breadcrumb__item::after {
  content: "/";
  color: var(--line);
}

.breadcrumb__item:last-child::after { content: none; }

.breadcrumb__link {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.breadcrumb__link:hover { color: var(--cyan); }

/* ---------- 14. 显现协议 ---------- */
html[data-reveal-ready] [data-reveal] {
  opacity: 0;
  transform: translateY(10px);
}

html[data-reveal-ready] [data-reveal][data-revealed] {
  opacity: 1;
  transform: none;
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1279px) {
  :root { --rail-w: 208px; }
}

@media (max-width: 1023px) {
  :root { --topbar-h: 56px; }

  body { padding-left: 0; }

  .rail {
    width: min(86vw, 330px);
    visibility: hidden;
    transform: translateX(-100%);
    box-shadow: 26px 0 60px -30px rgba(0, 0, 0, 0.9);
    transition: transform 0.28s var(--ease), visibility 0.28s var(--ease);
  }

  .site-header[data-open] .rail {
    visibility: visible;
    transform: none;
  }

  .topbar { left: 0; }

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

@media (max-width: 900px) {
  .grid--2,
  .grid--3,
  .grid--split,
  .grid--aside { grid-template-columns: minmax(0, 1fr); }

  .footer-inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
  .footer-contact { grid-column: 1 / -1; }

  .section__head { align-items: flex-start; }
}

@media (max-width: 560px) {
  .footer-inner { grid-template-columns: minmax(0, 1fr); }
  .footer-meta { justify-content: flex-start; }
  .panel { padding: 18px 16px; }
}

@media (max-width: 420px) {
  .topbar__status { display: none; }
  .btn { width: 100%; justify-content: center; }
}

/* ---------- 16. 减弱动效 ---------- */
@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[data-reveal-ready] [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .pulse { opacity: 1; animation: none; }
}