/* ==========================================================================
   云体育主站 · /assets/site.css
   共享外壳：重置 / 变量 / 中文排版 / 头部 / 页脚 / 通用组件 / 响应式
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; }
h1, h2, h3, h4, h5, h6, p, ul, ol, dl, dd, dt, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, picture, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 变量 ---------- */
:root {
  --c-bg: #061224;
  --c-bg-2: #0C1F38;
  --c-bg-3: #12294A;
  --c-cyan: #3DF2DA;
  --c-cyan-soft: #A8FBEF;
  --c-steal: #FF5C3A;
  --c-paper: #F1E6D2;
  --c-ink: #0A0E14;
  --c-slate: #8DA2BC;
  --c-white: #EAF4FF;

  --line: rgba(141, 162, 188, 0.22);
  --line-soft: rgba(141, 162, 188, 0.13);
  --line-cyan: rgba(61, 242, 218, 0.42);

  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-cond: "Archivo Narrow", "Oswald", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --font-body: Inter, "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;

  --wrap: 1280px;
  --gutter: clamp(16px, 3.4vw, 40px);
  --dur: 0.22s;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

/* ---------- 3. 基础与中文排版 ---------- */
body {
  background-color: var(--c-bg);
  background-image:
    linear-gradient(rgba(141, 162, 188, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(141, 162, 188, 0.07) 1px, transparent 1px);
  background-size: 64px 64px, 64px 64px;
  background-position: center top;
  color: var(--c-white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
p { text-wrap: pretty; }
h1, h2, h3 { text-wrap: balance; }
strong { font-weight: 700; }
:focus-visible { outline: 2px solid var(--c-cyan); outline-offset: 2px; }

/* ---------- 4. 容器与网格 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.grid { display: grid; gap: clamp(16px, 2vw, 28px); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
.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-9 { grid-column: span 9; }
.col-12 { grid-column: span 12; }
.section { padding-block: clamp(40px, 6vw, 80px); }
.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(20px, 3vw, 36px);
}

/* ---------- 5. 排版组件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-cond);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-cyan);
}
.eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--c-steal); }
.label {
  font-family: var(--font-cond);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-slate);
}
.display-1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 7vw, 86px);
  line-height: 1.03;
  letter-spacing: -0.02em;
  color: var(--c-white);
}
.display-2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.6vw, 44px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--c-white);
}
.h3 {
  font-family: var(--font-cond);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.4;
  letter-spacing: 0.01em;
  color: var(--c-white);
}
.lede {
  font-size: clamp(16px, 1.3vw, 19px);
  line-height: 1.75;
  color: var(--c-slate);
  max-width: 62ch;
}
.prose { max-width: 68ch; font-size: 17px; line-height: 1.75; color: #C6D6E8; }
.prose p + p { margin-top: 1em; }
.prose strong { color: var(--c-white); }
.prose a { color: var(--c-cyan); border-bottom: 1px solid var(--line-cyan); }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: 0; }

/* ---------- 6. 跳过链接 ---------- */
.skip-link {
  position: absolute;
  left: 8px;
  top: -64px;
  z-index: 300;
  padding: 10px 18px;
  background: var(--c-cyan);
  color: var(--c-ink);
  font-family: var(--font-cond);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 8px; }

/* ---------- 7. 头部外壳 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(6, 18, 36, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-cyan);
}
.header__progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-steal));
  transition: width 0.12s linear;
  z-index: 3;
}

/* 轮次索引带 */
.ticker {
  display: flex;
  align-items: stretch;
  min-height: 38px;
  background: var(--c-bg-2);
  border-bottom: 1px solid var(--line-soft);
}
.ticker__label {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  padding-inline: 12px;
  background: var(--c-cyan);
  color: var(--c-ink);
  font-family: var(--font-cond);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  white-space: nowrap;
}
.ticker__track {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 5px 10px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.ticker__track::-webkit-scrollbar { display: none; }
.ticker__track:focus-visible { outline: 2px solid var(--c-cyan); outline-offset: -2px; }
.ticker__steps { flex: 0 0 auto; display: flex; border-left: 1px solid var(--line); }
.ticker__step {
  width: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--c-slate);
  font-family: var(--font-mono);
  font-size: 15px;
  border-right: 1px solid var(--line);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.ticker__step:last-child { border-right: 0; }
.ticker__step:hover { background: var(--c-bg-3); color: var(--c-cyan); }

.round-chip {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border: 1px solid var(--line);
  background: var(--c-bg);
  color: var(--c-slate);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.round-chip:hover { color: var(--c-white); border-color: var(--line-cyan); background: var(--c-bg-3); }
.round-chip__no { font-weight: 700; }
.round-chip__tag {
  font-family: var(--font-cond);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--c-steal);
}
.round-chip.is-current,
.round-chip[aria-current="true"] {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  color: var(--c-ink);
}
.round-chip.is-current .round-chip__tag,
.round-chip[aria-current="true"] .round-chip__tag { color: rgba(10, 14, 20, 0.72); }

/* 命令栏 */
.cmdbar {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 24px);
  padding-block: 10px;
}
.brand {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-right: auto;
}
.brand__mark {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background:
    linear-gradient(135deg, rgba(61, 242, 218, 0.22), transparent 62%),
    var(--c-bg-3);
  border: 1px solid var(--line-cyan);
  color: var(--c-cyan);
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 900;
  line-height: 1;
}
.brand__text { display: flex; flex-direction: column; gap: 1px; }
.brand__name {
  font-family: var(--font-cond);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--c-white);
  line-height: 1.15;
}
.brand__sub {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  color: var(--c-slate);
  line-height: 1.2;
}

.nav { flex: 0 1 auto; }
.nav__list { display: flex; align-items: stretch; gap: 2px; }
.nav__item { display: flex; }
.nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 9px 12px 8px;
  border-top: 2px solid transparent;
  border-bottom: 2px solid transparent;
  color: var(--c-slate);
  font-family: var(--font-cond);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.2;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.nav__label { white-space: nowrap; }
.nav__idx { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0; color: rgba(141, 162, 188, 0.75); }
.nav__link:hover { color: var(--c-white); background: var(--c-bg-3); }
.nav__link[aria-current="page"] {
  color: var(--c-cyan);
  background: rgba(61, 242, 218, 0.08);
  border-bottom-color: var(--c-cyan);
}
.nav__link[aria-current="page"] .nav__idx { color: var(--c-steal); }

.cmdbar__actions { flex: 0 0 auto; display: flex; align-items: center; gap: 8px; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  border: 1px solid var(--line-cyan);
  background: rgba(61, 242, 218, 0.07);
  color: var(--c-cyan);
  font-family: var(--font-cond);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.nav-toggle__bars { display: inline-flex; flex-direction: column; gap: 3px; width: 16px; }
.nav-toggle__bars i { display: block; height: 2px; background: currentColor; transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease); }
.site-header[data-open] .nav-toggle { background: var(--c-cyan); color: var(--c-ink); border-color: var(--c-cyan); }
.site-header[data-open] .nav-toggle__bars i:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle__bars i:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* ---------- 8. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-radius: 0;
  font-family: var(--font-cond);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.btn--sm { padding: 9px 14px; font-size: 12.5px; }
.btn--primary { background: var(--c-cyan); color: #04121F; border-color: var(--c-cyan); }
.btn--primary:hover { background: var(--c-cyan-soft); border-color: var(--c-cyan-soft); }
.btn--ghost { background: transparent; color: var(--c-cyan-soft); border-color: var(--line-cyan); }
.btn--ghost:hover { background: rgba(61, 242, 218, 0.12); color: var(--c-white); border-color: var(--c-cyan); }
.btn--paper { background: var(--c-paper); color: var(--c-ink); border-color: var(--c-paper); }
.btn--paper:hover { background: #FFF6E6; border-color: #FFF6E6; }

/* ---------- 9. 面板、卡片、数据 ---------- */
.panel {
  position: relative;
  background: var(--c-bg-2);
  border: 1px solid var(--line);
  padding: clamp(18px, 2.4vw, 32px);
}
.panel--paper { background: var(--c-paper); color: var(--c-ink); border-color: rgba(10, 14, 20, 0.35); }
.panel--paper .lede,
.panel--paper .label { color: #4A4132; }
.panel--paper .h3,
.panel--paper .display-2 { color: var(--c-ink); }
.panel__head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line);
}
.panel--paper .panel__head { border-bottom-color: rgba(10, 14, 20, 0.25); }

.card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px 18px 20px;
  background: var(--c-bg-2);
  border: 1px solid var(--line);
  border-top: 2px solid var(--c-cyan);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.card:hover { background: var(--c-bg-3); border-color: var(--line-cyan); transform: translateY(-2px); }
.card__top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; }
.card__title { font-family: var(--font-cond); font-size: 17px; font-weight: 700; color: var(--c-white); line-height: 1.35; }
.card__meta { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.04em; color: var(--c-slate); }
.card__body { font-size: 14.5px; line-height: 1.7; color: var(--c-slate); }

.stat { display: flex; flex-direction: column; gap: 4px; }
.stat__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1;
  color: var(--c-white);
  font-variant-numeric: tabular-nums;
}
.stat__label {
  font-family: var(--font-cond);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-slate);
}
.stat--peak .stat__num { color: var(--c-steal); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--line);
  font-family: var(--font-cond);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-slate);
}
.tag--cyan { border-color: var(--line-cyan); background: rgba(61, 242, 218, 0.08); color: var(--c-cyan); }
.tag--steal { border-color: rgba(255, 92, 58, 0.55); background: rgba(255, 92, 58, 0.1); color: var(--c-steal); }

/* ---------- 10. 面包屑与分段控件 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-slate);
}
.crumbs a { transition: color var(--dur) var(--ease); }
.crumbs a:hover { color: var(--c-cyan); }
.crumbs__sep { color: var(--c-steal); opacity: 0.75; }
.crumbs__current { color: var(--c-white); }

.seg { display: block; }
.seg__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  padding: 4px;
  background: var(--c-bg-2);
  border: 1px solid var(--line);
}
.seg__btn {
  flex: 1 1 auto;
  min-width: 118px;
  padding: 10px 14px;
  border: 1px solid transparent;
  color: var(--c-slate);
  font-family: var(--font-cond);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.3;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.seg__btn:hover { background: var(--c-bg-3); color: var(--c-white); }
.seg__btn[aria-selected="true"] { background: var(--c-cyan); border-color: var(--c-cyan); color: #04121F; }
.seg__panels { margin-top: 22px; }
.seg__panel[hidden] { display: none; }
.seg__panel:focus { outline: none; }

/* ---------- 11. 索引目录 ---------- */
.index-list { border-top: 1px solid var(--line); }
.index-list__item {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: baseline;
  padding: 14px 4px;
  border-bottom: 1px solid var(--line-soft);
  transition: background var(--dur) var(--ease);
}
.index-list__item:hover { background: rgba(61, 242, 218, 0.05); }
.index-list__no { font-family: var(--font-mono); font-size: 12px; color: var(--c-steal); letter-spacing: 0.04em; }
.index-list__link { font-family: var(--font-cond); font-size: 16px; font-weight: 700; color: var(--c-white); }
.index-list__note { font-size: 13px; line-height: 1.6; color: var(--c-slate); text-align: right; }

/* ---------- 12. 图片容器基础规则 ---------- */
.figure { margin: 0; }
.figure__frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--c-bg-3), var(--c-bg-2));
  border: 1px solid var(--line);
}
.figure__frame img,
.figure__frame video { width: 100%; height: 100%; object-fit: cover; }
.figure__ph {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  text-align: center;
  color: var(--c-slate);
  font-family: var(--font-cond);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  background:
    linear-gradient(135deg, rgba(61, 242, 218, 0.12), transparent 58%),
    repeating-linear-gradient(45deg, rgba(141, 162, 188, 0.1) 0 1px, transparent 1px 12px),
    var(--c-bg-3);
}
.figure__cap { margin-top: 10px; font-size: 13px; line-height: 1.6; color: var(--c-slate); }
.figure--wide .figure__frame { aspect-ratio: 21 / 9; }
.figure--portrait .figure__frame { aspect-ratio: 3 / 4; }
.figure--square .figure__frame { aspect-ratio: 1 / 1; }
.figure--cut .figure__frame { clip-path: polygon(0 0, 100% 0, 100% 82%, 84% 100%, 0 100%); }

/* ---------- 13. 显现动画钩子 ---------- */
[data-reveal] { will-change: opacity, transform; }

/* ---------- 14. 页脚 ---------- */
.site-footer {
  margin-top: clamp(48px, 8vw, 96px);
  background: var(--c-bg-2);
  border-top: 1px solid var(--line-cyan);
  color: var(--c-slate);
}
.foot {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 64px);
  padding-top: clamp(36px, 5vw, 64px);
  padding-bottom: clamp(28px, 4vw, 48px);
}
.foot__note { margin-top: 16px; max-width: 44ch; font-size: 14px; line-height: 1.75; color: var(--c-slate); }
.foot__contact { margin-top: 22px; display: grid; gap: 8px; max-width: 54ch; }
.foot__contact-row {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line-soft);
}
.foot__contact-key {
  font-family: var(--font-cond);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-slate);
}
.foot__contact-val { font-size: 13.5px; line-height: 1.65; color: var(--c-white); }
.foot__cols { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(16px, 2.4vw, 32px); }
.foot__title {
  padding-bottom: 8px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-cond);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-cyan);
}
.foot__links { display: flex; flex-direction: column; gap: 9px; }
.foot__link { font-size: 14px; color: var(--c-slate); transition: color var(--dur) var(--ease); }
.foot__link::before { content: "/"; margin-right: 8px; font-family: var(--font-mono); color: var(--c-steal); }
.foot__link:hover { color: var(--c-white); }
.foot__legal { background: var(--c-bg); border-top: 1px solid var(--line); }
.foot__legal-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding-block: 14px;
  font-size: 12px;
  color: var(--c-slate);
}
.foot__icp { font-family: var(--font-mono); }
.foot__route { color: var(--c-cyan); opacity: 0.8; }

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1180px) {
  .brand__sub { display: none; }
  .nav__idx { display: none; }
  .nav__link { padding: 9px 10px 8px; font-size: 13.5px; }
}

@media (max-width: 1080px) {
  .col-3, .col-4, .col-5 { grid-column: span 6; }
  .col-7, .col-8, .col-9 { grid-column: span 12; }
  .foot { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 980px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 70;
    max-height: calc(100vh - 110px);
    overflow-y: auto;
    padding: 6px var(--gutter) 18px;
    background: var(--c-bg-2);
    border-top: 1px solid var(--line-cyan);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 28px 48px rgba(0, 0, 0, 0.5);
  }
  .site-header[data-open] .nav { display: block; }
  .nav__list { flex-direction: column; gap: 0; }
  .nav__item { display: block; width: 100%; }
  .nav__link {
    width: 100%;
    padding: 14px 2px;
    border-top: 0;
    border-bottom: 1px solid var(--line-soft);
    font-size: 16px;
  }
  .nav__idx { display: inline; }
  .nav__link[aria-current="page"] {
    background: rgba(61, 242, 218, 0.07);
    border-bottom-color: var(--line-cyan);
  }
  .cmdbar { gap: 10px; }
}

@media (max-width: 720px) {
  .brand__mark { width: 30px; height: 30px; font-size: 15px; }
  .brand__name { font-size: 15px; }
  .nav-toggle__text { display: none; }
  .btn--ghost { display: none; }
  .ticker__label { padding-inline: 10px; font-size: 11px; }
  .ticker__step { width: 34px; }
  .foot__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .grid--12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .grid--12 > * { grid-column: span 6; }
  .index-list__item { grid-template-columns: minmax(0, 1fr); gap: 4px; }
  .index-list__note { text-align: left; }
  .foot__contact-row { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .seg__btn { min-width: 50%; }
}

/* ---------- 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;
    scroll-behavior: auto !important;
  }
}