/* ==========================================================================
   中欧赛事 CN · 共享站点样式 /assets/site.css
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 120px;
}

body {
  margin: 0;
  background-color: var(--c-ink);
  color: var(--c-bone);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.55;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6, p, figure, figcaption, blockquote, dl, dd, ul, ol, li, table { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
table { border-collapse: collapse; width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
input, textarea, select { font: inherit; }
strong { font-weight: 700; }
::selection { background: var(--c-cyan); color: var(--c-teal-ink); }

/* ---------- 变量 ---------- */
:root {
  --c-ink: #0B1F1A;
  --c-ink-2: #122A23;
  --c-moss: #1E4034;
  --c-stone: #8FA79B;
  --c-bone: #EDE8DC;
  --c-cyan: #2BE8C4;
  --c-orange: #FF7A2F;
  --c-clay: #B4643C;
  --c-line: #C8D3CC;
  --c-teal-ink: #06231D;

  --line-soft: rgba(200, 211, 204, 0.20);
  --line-strong: rgba(200, 211, 204, 0.42);

  --font-sans: "PingFang SC", "HarmonyOS Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --gutter: clamp(16px, 4vw, 56px);
  --maxw: 1320px;
  --cut: 18px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 排版工具 ---------- */
h1, h2, h3 {
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.06;
}

.display {
  font-size: clamp(48px, 8vw, 120px);
  font-weight: 200;
  letter-spacing: -0.025em;
  line-height: 0.96;
}

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

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.muted { color: var(--c-stone); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.link-underline {
  position: relative;
  display: inline-block;
  padding-bottom: 2px;
  color: var(--c-bone);
  transition: color 180ms var(--ease);
}
.link-underline::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 220ms var(--ease), background-color 180ms var(--ease);
}
.link-underline:hover,
.link-underline:focus-visible { color: var(--c-cyan); }
.link-underline:hover::after,
.link-underline:focus-visible::after {
  transform: scaleX(1);
  background: var(--c-cyan);
}

/* ---------- 焦点 ---------- */
:where(a, button, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 3px;
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -120px;
  left: var(--gutter);
  z-index: 300;
  padding: 12px 20px;
  background: var(--c-cyan);
  color: var(--c-teal-ink);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 14px 100%, 0 calc(100% - 14px));
  transition: top 160ms var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible { top: 12px; }

/* ---------- 布局 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: clamp(40px, 7vw, 96px);
}

.grid {
  display: grid;
  gap: clamp(18px, 3vw, 40px);
}
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1;
  border: 1px solid transparent;
  white-space: nowrap;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: background-color 180ms var(--ease), color 180ms var(--ease), border-color 180ms var(--ease);
}

.btn--cta {
  background: var(--c-orange);
  color: var(--c-teal-ink);
}
.btn--cta:hover,
.btn--cta:focus-visible {
  background: var(--c-cyan);
  color: var(--c-teal-ink);
}

.btn--ghost {
  background: transparent;
  color: var(--c-bone);
  border-color: var(--line-strong);
}
.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
}

/* ==========================================================================
   头部
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  padding-top: 14px;
  transition: padding-top 180ms var(--ease);
}
.site-header::before {
  content: "";
  position: absolute;
  inset: 0 0 -26px;
  background: linear-gradient(180deg, rgba(11, 31, 26, 0.97) 0%, rgba(11, 31, 26, 0.84) 58%, rgba(11, 31, 26, 0) 100%);
  pointer-events: none;
}
.site-header > * { position: relative; }

.site-header__inner {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(10px, 2vw, 28px);
  width: min(var(--maxw), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
}

/* 品牌岛 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px 8px 12px;
  background: rgba(18, 42, 35, 0.72);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: border-color 180ms var(--ease);
}
.brand:hover { border-color: var(--line-strong); }

.brand__mark {
  width: 9px;
  height: 24px;
  background: var(--c-cyan);
  clip-path: polygon(0 0, 100% 16%, 100% 100%, 0 84%);
  flex: none;
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.brand__name {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--c-bone);
}

.brand__line {
  margin-top: 5px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--c-stone);
  opacity: 1;
  transition: opacity 180ms var(--ease);
}

/* 胶囊导航 */
.pill-nav {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px;
  background: rgba(18, 42, 35, 0.70);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
  transition: padding 180ms var(--ease), background-color 180ms var(--ease);
}

.pill-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.pill-nav__link {
  position: relative;
  display: inline-block;
  padding: 9px 14px;
  font-size: 13.5px;
  letter-spacing: 0.06em;
  color: var(--c-stone);
  transition: color 180ms var(--ease), padding 180ms var(--ease), font-size 180ms var(--ease);
}
.pill-nav__link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 5px;
  height: 1px;
  background: var(--c-cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 220ms var(--ease);
}
.pill-nav__link:hover,
.pill-nav__link:focus-visible { color: var(--c-bone); }
.pill-nav__link:hover::after,
.pill-nav__link:focus-visible::after { transform: scaleX(1); }

.pill-nav__link[aria-current="page"] { color: var(--c-cyan); }
.pill-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--c-cyan);
}

.pill-nav__foot { display: none; }

.pill-nav__foot-note {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-stone);
  text-align: center;
}

/* 右侧海岛 */
.site-header__aside {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* 移动菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 10px 13px;
  background: rgba(18, 42, 35, 0.78);
  border: 1px solid var(--line-strong);
  color: var(--c-bone);
  font-size: 12px;
  letter-spacing: 0.14em;
  transition: border-color 180ms var(--ease), color 180ms var(--ease);
}
.nav-toggle:hover { border-color: var(--c-cyan); color: var(--c-cyan); }

.nav-toggle__label { line-height: 1; }

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

.nav-toggle__bar {
  height: 2px;
  width: 100%;
  background: currentColor;
  transition: transform 180ms var(--ease), opacity 180ms var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* 收窄态 */
.site-header[data-condensed] { padding-top: 8px; }
.site-header[data-condensed] .pill-nav { padding: 4px; }
.site-header[data-condensed] .pill-nav__link { padding: 7px 12px; font-size: 12.5px; }
.site-header[data-condensed] .brand__line { opacity: 0; }
.site-header[data-condensed] .brand { padding-block: 6px; }

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 120px);
  background: var(--c-ink-2);
  border-top: 1px solid var(--line-strong);
  color: var(--c-stone);
  font-size: 14px;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: clamp(64px, 18vw, 220px);
  height: 2px;
  background: var(--c-cyan);
}

.site-footer__inner {
  width: min(var(--maxw), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
  padding-block: clamp(36px, 5vw, 64px) clamp(22px, 3vw, 32px);
}

.site-footer__top {
  display: grid;
  grid-template-columns: minmax(200px, 260px) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 64px);
  padding-bottom: clamp(28px, 4vw, 48px);
  border-bottom: 1px solid var(--line-soft);
}

.site-footer__brand { display: flex; flex-direction: column; gap: 12px; }

.site-footer__mark {
  width: 34px;
  height: 4px;
  background: var(--c-orange);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 6px 100%);
}

.site-footer__name {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-bone);
}

.site-footer__tagline {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--c-stone);
  max-width: 24ch;
}

.site-footer__coords {
  display: flex;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--c-clay);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 40px);
}

.site-footer__col-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--c-bone);
  line-height: 1;
}
.site-footer__col-title::before {
  content: "";
  width: 5px;
  height: 5px;
  background: var(--c-cyan);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
}

.site-footer__list { display: flex; flex-direction: column; }

.site-footer__link {
  position: relative;
  display: inline-block;
  padding: 5px 0;
  font-size: 13.5px;
  color: var(--c-stone);
  transition: color 160ms var(--ease), padding-left 160ms var(--ease);
}
.site-footer__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 0;
  height: 1px;
  background: var(--c-cyan);
  transform: translateY(-50%);
  transition: width 160ms var(--ease);
}
.site-footer__link:hover,
.site-footer__link:focus-visible { color: var(--c-bone); padding-left: 12px; }
.site-footer__link:hover::before,
.site-footer__link:focus-visible::before { width: 8px; }

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

.site-footer__line {
  padding: 4px 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--c-stone);
  word-break: break-word;
}
.site-footer__line--muted { color: var(--c-clay); font-size: 12px; letter-spacing: 0.04em; }

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 32px;
  padding-top: 22px;
}

.site-footer__legal-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--c-stone);
}
.site-footer__legal-sig { color: var(--c-bone); letter-spacing: 0.14em; }
.site-footer__legal-sep { color: var(--c-clay); }

.site-footer__note {
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--c-stone);
  max-width: 46ch;
}

/* ==========================================================================
   通用组件
   ========================================================================== */

/* 章节开篇 */
.section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(12px, 2vw, 26px);
  align-items: start;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line-soft);
}
.section-head__index {
  padding-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--c-cyan);
}
.section-head__title {
  font-size: clamp(28px, 4.4vw, 56px);
  font-weight: 300;
  letter-spacing: -0.02em;
}
.section-head__note {
  margin-top: 12px;
  max-width: 54ch;
  font-size: 14px;
  color: var(--c-stone);
}

/* 横向数据带 */
.data-band {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(14px, 3vw, 44px);
  padding: 14px clamp(14px, 2vw, 24px);
  background: var(--c-ink-2);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}
.data-band__index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--c-clay);
  white-space: nowrap;
}
.data-band__cells {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(14px, 3vw, 48px);
}
.data-band__cell { display: flex; flex-direction: column; gap: 2px; }
.data-band__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(20px, 2.4vw, 30px);
  line-height: 1.1;
  color: var(--c-bone);
  transition: color 180ms var(--ease);
}
.data-band__cell:hover .data-band__value { color: var(--c-orange); }
.data-band__key {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-stone);
}
.data-band__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--c-stone);
  text-align: right;
  white-space: nowrap;
}

/* 斜切面板 */
.cut-panel {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(20px, 3vw, 34px);
  background: var(--c-moss);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
  transition: transform 180ms var(--ease);
}
.cut-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--c-ink-2);
  transform: translateY(100%);
  transition: transform 180ms var(--ease);
}
.cut-panel:hover::before { transform: translateY(0); }
.cut-panel > * { position: relative; }

.cut-panel__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--c-cyan);
}
.cut-panel__value {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(30px, 5vw, 56px);
  line-height: 1;
  color: var(--c-bone);
}
.cut-panel__note {
  margin-top: 12px;
  font-size: 13px;
  color: var(--c-stone);
  max-width: 34ch;
}

/* 分屏对读 */
.split-frame {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  gap: clamp(20px, 4vw, 56px);
  align-items: start;
}
.split-frame--5-7 { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
.split-frame__aside { position: relative; }
.split-frame__main { position: relative; min-width: 0; }

/* 侧边坐标索引 */
.index-rail {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: 16px;
  border-left: 1px solid var(--line-soft);
}
.index-rail__item {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 7px 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-stone);
  transition: color 160ms var(--ease);
}
.index-rail__item::before {
  content: "";
  position: absolute;
  left: -17px;
  top: 50%;
  width: 0;
  height: 2px;
  background: var(--c-cyan);
  transform: translateY(-50%);
  transition: width 160ms var(--ease);
}
.index-rail__item:hover,
.index-rail__item:focus-visible { color: var(--c-bone); }
.index-rail__item:hover::before,
.index-rail__item:focus-visible::before,
.index-rail__item[aria-current="true"]::before { width: 15px; }
.index-rail__item[aria-current="true"] { color: var(--c-cyan); }
.index-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-clay);
  letter-spacing: 0.06em;
}

/* 刻度时间轴 */
.timeline { display: flex; flex-direction: column; }

.timeline__row {
  position: relative;
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr) auto;
  grid-template-areas:
    "time team score"
    "time meta meta";
  column-gap: clamp(10px, 2vw, 22px);
  row-gap: 2px;
  align-items: baseline;
  padding: 12px 0 12px 14px;
  border-bottom: 1px solid var(--line-soft);
  transition: background-color 160ms var(--ease);
}
.timeline__row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--c-orange);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 180ms var(--ease);
}
.timeline__row:hover { background: rgba(30, 64, 52, 0.35); }
.timeline__row:hover::before { transform: scaleY(1); }

.timeline__time {
  grid-area: time;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-cyan);
}
.timeline__team {
  grid-area: team;
  font-size: 15px;
  color: var(--c-bone);
}
.timeline__score {
  grid-area: score;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 20px;
  font-weight: 700;
  color: var(--c-bone);
  transition: color 180ms var(--ease);
}
.timeline__row:hover .timeline__score { color: var(--c-orange); }
.timeline__meta {
  grid-area: meta;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--c-stone);
  opacity: 0.55;
  transition: opacity 180ms var(--ease);
}
.timeline__row:hover .timeline__meta { opacity: 1; }

/* 面包屑 */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-stone);
}
.breadcrumbs__sep { color: var(--c-clay); }

/* 长文 */
.prose {
  max-width: 68ch;
  font-size: 16.5px;
  line-height: 1.62;
  color: var(--c-bone);
}
.prose > * + * { margin-top: 1em; }
.prose h2 {
  margin-top: 1.8em;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 300;
}
.prose h3 {
  margin-top: 1.6em;
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.01em;
}
.prose ul > li,
.prose ol > li {
  position: relative;
  padding-left: 18px;
}
.prose ul > li + li,
.prose ol > li + li { margin-top: 0.5em; }
.prose ul > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 9px;
  height: 1px;
  background: var(--c-cyan);
}
.prose strong { color: var(--c-cyan); font-weight: 700; }
.prose a {
  color: var(--c-cyan);
  border-bottom: 1px solid var(--line-strong);
}

/* 图片容器 */
.media-frame {
  position: relative;
  overflow: hidden;
  background: var(--c-moss);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}
.media-frame > img,
.media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 10;
}
.media-frame--tall .media-frame__img,
.media-frame--tall > img { aspect-ratio: 4 / 5; }
.media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 8px 14px;
  background: rgba(11, 31, 26, 0.86);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-stone);
}

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  line-height: 1.4;
  border: 1px solid var(--line-soft);
  color: var(--c-stone);
}
.tag--cyan {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  color: var(--c-teal-ink);
}
.tag--orange {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: var(--c-teal-ink);
}

/* 滚动进度条（由 JS 注入） */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 200;
  pointer-events: none;
  background: transparent;
}
.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--c-cyan) 0%, var(--c-cyan) 62%, var(--c-orange) 100%);
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1100px) {
  .pill-nav__link { padding: 9px 11px; font-size: 13px; }
  .pill-nav__link::after { left: 11px; right: 11px; }
}

@media (max-width: 900px) {
  .site-header__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    row-gap: 10px;
  }

  .brand { grid-column: 1; grid-row: 1; justify-self: start; }

  .site-header__aside { grid-column: 2; grid-row: 1; }

  .header-cta { display: none; }

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

  .pill-nav {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-self: stretch;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    background: rgba(11, 31, 26, 0.97);
    border: 1px solid var(--line-strong);
    clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
  }
  .pill-nav[data-open] { display: flex; }

  .pill-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }
  .pill-nav__link {
    display: block;
    padding: 14px 6px;
    font-size: 15px;
    letter-spacing: 0.08em;
    border-bottom: 1px solid var(--line-soft);
  }
  .pill-nav__link::after { display: none; }
  .pill-nav__link[aria-current="page"] { color: var(--c-cyan); }
  .pill-nav__link[aria-current="page"]::before {
    content: "";
    display: inline-block;
    width: 10px;
    height: 2px;
    margin-right: 8px;
    vertical-align: middle;
    background: var(--c-cyan);
  }

  .pill-nav__foot {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding-top: 14px;
  }
  .pill-nav__foot .btn { width: 100%; padding-block: 13px; }

  .site-footer__top { grid-template-columns: minmax(0, 1fr); }
  .site-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .split-frame,
  .split-frame--5-7 { grid-template-columns: minmax(0, 1fr); }

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

@media (max-width: 640px) {
  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }

  .data-band {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }
  .data-band__meta { text-align: left; }
  .data-band__cells { gap: 18px 26px; }

  .site-footer__grid { grid-template-columns: minmax(0, 1fr); }
  .site-footer__legal { flex-direction: column; align-items: flex-start; }

  .timeline__row {
    grid-template-columns: 66px minmax(0, 1fr) auto;
    padding-left: 12px;
  }
  .timeline__team { font-size: 14px; }
}

/* 窄体近似：无窄体字体时用字距与拉伸收束 */
@supports not (font-stretch: condensed) {
  .display,
  .section-head__title { letter-spacing: -0.03em; }
}

/* 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;
    scroll-behavior: auto !important;
  }
  .cut-panel::before { transform: translateY(0); opacity: 0; }
  .cut-panel:hover::before { opacity: 1; }
}