/* ==========================================================================
   333体育主站 · 共享样式 /assets/site.css
   赛场控制台：深墨绿场 + 暖纸白秩序册 + 青柠交互 + 琥珀状态
   ========================================================================== */

/* ---------- 1. RESET ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: calc(var(--topbar-h, 64px) + 20px);
}

body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
img, svg, video, canvas { display: block; max-width: 100%; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 变量 ---------- */
:root {
  /* 色彩 */
  --ink: #0B1F19;
  --ink-2: #14332B;
  --ink-3: #1B4036;
  --paper: #F5EFE1;
  --paper-2: #E4DAC6;
  --lime: #C6FF3D;
  --lime-deep: #3F6300;
  --amber: #FFA02B;
  --amber-deep: #B45309;
  --signal: #E14B32;
  --mist: #8FAFA4;
  --black: #14140F;

  /* 度量 */
  --rail-w: 88px;
  --topbar-h: 64px;
  --bw: 2px;
  --shadow-hard: 6px 6px 0 var(--ink-2);
  --shadow-lime: 6px 6px 0 var(--ink-3);
  --hr: rgba(143, 175, 164, 0.28);

  /* 字体 */
  --font-display: "Barlow Condensed", "Oswald", "Arial Narrow", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-num: "JetBrains Mono", "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --font-serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-body: "PingFang SC", "HarmonyOS Sans SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;

  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--paper);
  background-color: var(--ink);
  padding-top: var(--topbar-h);
  min-height: 100vh;
  overflow-x: hidden;
  word-break: normal;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@media (min-width: 901px) {
  body { padding-left: var(--rail-w); }
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
  box-shadow: 0 0 0 5px var(--lime);
  border-radius: 1px;
}

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

/* ---------- 4. 排版组件 ---------- */
.h-display {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(40px, 7vw, 88px);
  line-height: 0.95;
  letter-spacing: -0.02em;
}

.h-num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(32px, 8vw, 160px);
  line-height: 0.88;
  letter-spacing: -0.04em;
}

.h-serif {
  font-family: var(--font-serif);
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.6;
  font-weight: 400;
}

.lede {
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.85;
  color: var(--mist);
  max-width: 46ch;
}

.label {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.prose { max-width: 68ch; font-size: 17px; line-height: 1.9; }
.prose p + p { margin-top: 1.1em; }
.prose a {
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.22em;
  text-decoration-color: currentColor;
}
.prose a:hover { color: var(--lime); }
.prose--onDark a { color: var(--lime); }

/* ---------- 5. 布局容器 ---------- */
.wrap {
  width: 100%;
  max-width: 1320px;
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 48px);
}

.section { padding-block: clamp(40px, 7vw, 88px); }

.grid { display: grid; gap: clamp(16px, 2.4vw, 28px); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

.slab {
  background: var(--paper);
  color: var(--black);
  border: var(--bw) solid var(--black);
  box-shadow: 8px 8px 0 var(--ink-3);
  padding: clamp(20px, 3vw, 36px);
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 22px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.2;
  border: var(--bw) solid transparent;
  border-radius: 0;
  background: transparent;
  color: var(--paper);
  cursor: pointer;
  text-align: center;
  transition: background-color 0.16s var(--ease), color 0.16s var(--ease),
              border-color 0.16s var(--ease), box-shadow 0.16s var(--ease),
              transform 0.16s var(--ease);
}

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

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

.btn--amber {
  background: var(--amber);
  color: var(--black);
  border-color: var(--amber);
}
.btn--amber:hover,
.btn--amber:focus-visible { background: var(--paper); border-color: var(--paper); }

.btn--sm { min-height: 44px; padding: 0 14px; font-size: 13px; }

/* ---------- 7. 状态标记 ---------- */
.dot {
  display: inline-block;
  width: 6px; height: 6px;
  background: var(--mist);
  flex: 0 0 auto;
}
.dot--amber { background: var(--amber); }
.dot--lime { background: var(--lime); }

.tag {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.14em;
  padding: 3px 8px;
  border: var(--bw) solid currentColor;
  line-height: 1.4;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  font-size: 11px;
  letter-spacing: 0.14em;
  line-height: 1.6;
  border: var(--bw) solid currentColor;
  text-transform: uppercase;
}
.pill--live { color: var(--amber); }
.pill--soon { color: var(--mist); }
.pill--done { color: var(--lime); }

/* ---------- 8. 图片容器 ---------- */
.media {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--ink-2);
  border: var(--bw) solid var(--paper);
  box-shadow: 6px 6px 0 var(--lime-deep);
  isolation: isolate;
}
.media > img,
.media > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(0.94) contrast(1.06);
}
.media__ph {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  padding: 16px;
  text-align: center;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist);
}
.media--portrait { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }
.media--wide { aspect-ratio: 21 / 9; }
.media--diag { clip-path: polygon(0 0, 100% 0, 100% 86%, 0 100%); }

/* ---------- 9. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  top: -120px;
  left: 12px;
  z-index: 210;
  background: var(--lime);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  padding: 10px 18px;
  border: var(--bw) solid var(--ink);
  transition: top 0.18s var(--ease);
}
.skip-link:focus { top: 10px; }

/* ---------- 10. 页头 ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-h);
  z-index: 130;
}

.topbar {
  display: flex;
  align-items: center;
  gap: clamp(8px, 1.6vw, 18px);
  height: var(--topbar-h);
  padding: 0 12px 0 14px;
  background: var(--ink);
  border-bottom: var(--bw) solid var(--ink-3);
  box-shadow: 0 3px 0 rgba(198, 255, 61, 0.14);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  color: var(--paper);
  min-height: 44px;
}
.brand__mark {
  display: inline-grid;
  place-items: center;
  min-width: 40px;
  padding: 4px 7px;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.02em;
  line-height: 1.1;
  background: var(--lime);
  color: var(--ink);
  border: var(--bw) solid var(--lime);
}
.brand:hover .brand__mark { background: var(--paper); border-color: var(--paper); }
.brand__text { display: flex; flex-direction: column; gap: 1px; }
.brand__name {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.15;
}
.brand__meta {
  font-family: var(--font-num);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--mist);
  line-height: 1.2;
}

/* 状态条 */
.statusbar {
  flex: 1 1 auto;
  min-width: 0;
  align-self: stretch;
  display: flex;
  align-items: center;
  padding: 0 clamp(8px, 1.4vw, 16px);
  border-left: 1px solid var(--hr);
  border-right: 1px solid var(--hr);
}
.statusbar__track {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.2vw, 28px);
  width: 100%;
  height: 100%;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.statusbar__track::-webkit-scrollbar { display: none; }
.statusbar__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
  line-height: 1;
}

/* 右侧动作区 */
.topbar__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  margin-left: auto;
}

/* 抽屉开关 */
.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  position: relative;
  color: var(--paper);
  border: var(--bw) solid var(--mist);
  transition: border-color 0.16s var(--ease), color 0.16s var(--ease);
}
.nav-toggle:hover { border-color: var(--lime); color: var(--lime); }
.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  transition: transform 0.18s var(--ease), opacity 0.18s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(7px) 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(-7px) rotate(-45deg); }

/* ---------- 11. 侧边轨道导航 ---------- */
.rail {
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  bottom: 0;
  width: var(--rail-w);
  z-index: 125;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 6px;
  padding: 12px 0 10px;
  background: var(--ink-2);
  border-right: var(--bw) solid rgba(198, 255, 61, 0.2);
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
}

.rail__head {
  display: flex;
  justify-content: center;
  padding: 0 0 10px;
  border-bottom: 1px solid var(--hr);
}
.rail__label {
  font-family: var(--font-num);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--mist);
}

.rail__list {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 2px;
  flex: 1 1 auto;
}

.rail__link {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding: 9px 2px 11px;
  color: var(--mist);
  transition: color 0.16s var(--ease), background-color 0.16s var(--ease);
}
.rail__link::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: transparent;
  transition: background-color 0.16s var(--ease);
}
.rail__link:hover {
  color: var(--paper);
  background: rgba(198, 255, 61, 0.07);
}
.rail__link[aria-current="page"] {
  color: var(--lime);
  background: rgba(198, 255, 61, 0.11);
}
.rail__link[aria-current="page"]::before { background: var(--lime); }
.rail__link[aria-current="page"] .rail__num { color: var(--lime); }

.rail__num {
  font-family: var(--font-num);
  font-size: 10px;
  letter-spacing: 0.08em;
  line-height: 1;
  color: var(--mist);
  transition: color 0.16s var(--ease);
}
.rail__text {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-size: 14px;
  letter-spacing: 0.16em;
  line-height: 1.05;
}

.rail__foot {
  display: flex;
  justify-content: center;
  padding-top: 10px;
  border-top: 1px solid var(--hr);
}
.rail__stamp {
  font-family: var(--font-num);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--mist);
  line-height: 1.4;
}

.rail-scrim {
  position: fixed;
  inset: 0;
  z-index: 122;
  background: rgba(5, 13, 11, 0.66);
}
.rail-scrim[hidden] { display: none; }

@media (min-width: 901px) {
  .rail-scrim { display: none; }
}

body.is-nav-open { overflow: hidden; }

/* ---------- 12. 页脚 ---------- */
.site-footer {
  margin-top: clamp(48px, 8vw, 96px);
  background: var(--ink);
  color: var(--paper);
  border-top: var(--bw) solid var(--lime);
}

.footer__inner {
  max-width: 1320px;
  margin-inline: auto;
  padding: clamp(32px, 5vw, 56px) clamp(16px, 4vw, 48px) 0;
}

.footer__brand { display: block; }
.footer__mark {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 4px 10px;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.02em;
  line-height: 1.2;
  background: var(--lime);
  color: var(--ink);
  transition: background-color 0.16s var(--ease), color 0.16s var(--ease);
}
.footer__mark:hover,
.footer__mark:focus-visible { background: var(--paper); color: var(--ink); }

.footer__name {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.3;
  margin-top: 14px;
}
.footer__sub {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--mist);
  margin-top: 2px;
}

/* 时间轴 */
.trackline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--hr);
  border-top: var(--bw) solid var(--mist);
}

.trackline__seg {
  position: relative;
  background: var(--ink);
  padding: 24px 18px 22px;
}
.trackline__seg::before {
  content: "";
  position: absolute;
  top: -8px;
  left: 18px;
  width: 12px;
  height: 12px;
  background: var(--ink);
  border: var(--bw) solid var(--mist);
  transition: background-color 0.16s var(--ease), border-color 0.16s var(--ease);
}
.trackline__seg:first-child::before { background: var(--lime); border-color: var(--lime); }
.trackline__seg:hover::before { background: var(--amber); border-color: var(--amber); }

.trackline__num {
  display: block;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
  line-height: 1.4;
}
.trackline__link {
  display: inline-block;
  margin-top: 6px;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.4vw, 24px);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.3;
  color: var(--paper);
  border-bottom: 2px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}
.trackline__link:hover,
.trackline__link:focus-visible { color: var(--lime); border-bottom-color: var(--lime); }

.trackline__note {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

/* 信息带 */
.footer__bands {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(28px, 4vw, 40px);
  background: var(--hr);
  border: var(--bw) solid var(--hr);
}

.band {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--ink-2);
  padding: clamp(16px, 2.4vw, 24px);
}
.band__label {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
  line-height: 1.4;
}
.band__text {
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}
.band__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: auto;
}
.band__link {
  align-self: flex-start;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
  border-bottom: 2px solid var(--lime);
  padding-bottom: 1px;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}
.band__link:hover,
.band__link:focus-visible { color: var(--lime); border-bottom-color: var(--paper); }

/* 底栏 */
.footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  margin-top: clamp(24px, 3vw, 36px);
  padding: 16px 0 24px;
  border-top: 1px solid var(--hr);
}
.footer__meta {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 13. 折叠内容组 ---------- */
.acc { border-top: var(--bw) solid var(--hr); }

.acc__head { margin: 0; font-size: inherit; font-weight: inherit; }

.acc__btn {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  min-height: 56px;
  padding: 16px 4px;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.6;
  text-align: left;
  color: inherit;
  border-bottom: var(--bw) solid var(--hr);
  transition: color 0.16s var(--ease), background-color 0.16s var(--ease);
}
.acc__btn:hover { background: rgba(198, 255, 61, 0.07); }
.acc__btn[aria-expanded="true"] { color: var(--lime); }

.acc__num {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
  flex: 0 0 auto;
}
.acc__label { flex: 1 1 auto; }

.acc__icon {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  border: var(--bw) solid var(--mist);
  transition: background-color 0.16s var(--ease), border-color 0.16s var(--ease);
}
.acc__icon::before,
.acc__icon::after {
  content: "";
  position: absolute;
  background: var(--mist);
  transition: transform 0.16s var(--ease), opacity 0.16s var(--ease),
              background-color 0.16s var(--ease);
}
.acc__icon::before { left: 50%; top: 4px; bottom: 4px; width: 2px; transform: translateX(-50%); }
.acc__icon::after { top: 50%; left: 4px; right: 4px; height: 2px; transform: translateY(-50%); }

.acc__btn[aria-expanded="true"] .acc__icon { background: var(--lime); border-color: var(--lime); }
.acc__btn[aria-expanded="true"] .acc__icon::before { background: var(--ink); opacity: 0; transform: translateX(-50%) rotate(90deg); }
.acc__btn[aria-expanded="true"] .acc__icon::after { background: var(--ink); }

.acc__panel {
  padding: 16px 4px 20px;
  border-bottom: var(--bw) solid var(--hr);
  font-size: 16px;
  line-height: 1.9;
  color: var(--mist);
}
.acc__panel[hidden] { display: none; }
.acc__panel > * + * { margin-top: 0.9em; }

/* ---------- 14. 滚动进度 ---------- */
.scroll-progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--lime);
  transform: scaleX(0);
  transform-origin: 0 50%;
  z-index: 240;
  pointer-events: none;
  transition: transform 0.1s linear;
}
@media (min-width: 901px) {
  .scroll-progress { left: var(--rail-w); }
}

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1180px) {
  .brand__meta { display: none; }
}

@media (max-width: 1024px) {
  .trackline { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__bands { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  :root { --topbar-h: 60px; }

  body { padding-left: 0; }

  .statusbar { display: none; }
  .topbar { padding: 0 12px; gap: 10px; }

  .nav-toggle { display: flex; }

  .rail {
    top: 0;
    bottom: 0;
    width: min(84vw, 320px);
    padding: 18px 0 16px;
    border-right: var(--bw) solid var(--lime);
    box-shadow: 10px 0 0 rgba(5, 13, 11, 0.45);
    transform: translateX(-100%);
    transition: transform 0.24s var(--ease);
    z-index: 140;
  }
  .rail[data-open="true"] { transform: translateX(0); }

  .rail__head {
    justify-content: flex-start;
    padding: 0 20px 12px;
    border-bottom: var(--bw) solid var(--hr);
  }
  .rail__label { font-size: 11px; }

  .rail__list { gap: 0; }

  .rail__link {
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 14px;
    padding: 13px 20px;
    border-bottom: 1px solid rgba(143, 175, 164, 0.18);
  }
  .rail__link::before { width: 4px; }
  .rail__num { font-size: 11px; width: 24px; text-align: left; }
  .rail__text {
    writing-mode: horizontal-tb;
    text-orientation: mixed;
    font-size: 16px;
    letter-spacing: 0.08em;
  }

  .rail__foot { justify-content: flex-start; padding: 12px 20px 0; }

  .footer__base { justify-content: flex-start; }
}

@media (max-width: 720px) {
  .footer__bands { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .trackline { grid-template-columns: 1fr; }
  .trackline__seg { padding: 22px 16px 20px; }
  .trackline__seg::before { left: 16px; }
}

@media (max-width: 480px) {
  .brand__name { font-size: 14px; }
  .brand__mark { min-width: 36px; font-size: 13px; padding: 4px 6px; }
  .btn--sm { font-size: 12px; padding: 0 10px; letter-spacing: 0; }
  .topbar { gap: 8px; }
}

/* ---------- 16. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .scroll-progress { transition: none; }
}