/* ============================================================
   大江体育赛场 · 共享样式 /assets/site.css
   塞上竞技刊物：居中刊头、非对称斜切网格、记分牌层叠
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 168px;
}

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, dl, dd, dt,
figure, blockquote, fieldset, legend {
  margin: 0;
  padding: 0;
}

ul, ol { list-style: none; }

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

a { color: inherit; text-decoration: none; }

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

table { border-collapse: collapse; }

hr { border: 0; }

/* ---------- 2. 变量 ---------- */
:root {
  /* 色彩体系 */
  --sunset: #E4610F;        /* 大漠落日金橙 */
  --sunset-ink: #C24E0A;    /* 深橙书写色 */
  --ink: #26262A;           /* 贺兰岩灰 */
  --ink-2: #4C4C52;         /* 岩灰次级阶 */
  --sand: #F5EEE3;          /* 大漠沙底 */
  --paper: #FFFFFF;         /* 纸白 */
  --turf: #14795B;          /* 赛场草皮青绿 */
  --volt: #F2E63C;          /* 数据荧光黄 */
  --brick: #9E2B1E;         /* 旧版砖红 */

  --sand-deep: #EDE4D5;
  --hairline: rgba(38, 38, 42, 0.16);
  --hairline-light: rgba(245, 238, 227, 0.18);

  /* 形状与材质 */
  --bd: 2px solid var(--ink);
  --bd-light: 2px solid var(--hairline-light);
  --shadow-hard: 6px 6px 0 var(--ink);
  --shadow-mid: 5px 5px 0 var(--ink);
  --shadow-soft: 3px 3px 0 var(--ink);

  /* 字体 */
  --font-display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas,
    "Liberation Mono", "Courier New", monospace;

  /* 布局 */
  --wrap: 1180px;
  --gutter: clamp(16px, 4vw, 40px);
  --gap: clamp(16px, 2.4vw, 32px);
  --section-y: clamp(44px, 7vw, 88px);
  --nav-bp: 900px;
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--sand);
  background-image:
    repeating-linear-gradient(112deg, rgba(38, 38, 42, 0.035) 0 1px, transparent 1px 9px),
    repeating-linear-gradient(68deg, rgba(228, 97, 15, 0.032) 0 1px, transparent 1px 15px);
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.6rem, 7vw, 6.4rem); }
h2 { font-size: clamp(1.7rem, 3.6vw, 3.1rem); }
h3 { font-size: clamp(1.16rem, 2vw, 1.6rem); letter-spacing: -0.01em; }
h4 { font-size: clamp(1rem, 1.4vw, 1.15rem); letter-spacing: 0; }

p { text-wrap: pretty; }

strong { font-weight: 800; }

::selection {
  background: var(--volt);
  color: var(--ink);
}

/* ---------- 4. 焦点与可达性 ---------- */
:focus-visible {
  outline: 3px solid var(--volt);
  outline-offset: 2px;
  box-shadow: 0 0 0 2px var(--ink);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 999;
  background: var(--volt);
  color: var(--ink);
  border: var(--bd);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.06em;
  padding: 12px 22px;
}

.skip-link:focus {
  left: 14px;
  top: 14px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 5. 容器与网格 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: var(--section-y);
}

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

.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; }

.stack {
  display: grid;
  gap: clamp(16px, 2vw, 26px);
}

.stack--shift > * + * { margin-top: -12px; }
.stack--shift > *:nth-child(even) { margin-left: clamp(10px, 2.6vw, 38px); }
.stack--shift > *:nth-child(3n) { margin-left: clamp(4px, 1.2vw, 16px); }

.slab {
  background: var(--ink);
  color: var(--sand);
  padding: clamp(26px, 5vw, 54px);
  clip-path: polygon(0 0, 100% 3%, 100% 100%, 0 97%);
}

.slab h2,
.slab h3 { color: var(--paper); }

/* ---------- 6. 数字与标签 ---------- */
.num,
.mono {
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--ink-2);
  text-transform: uppercase;
}

.tag__num {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1;
  padding: 5px 8px;
  border: var(--bd);
  background: var(--paper);
  color: var(--ink);
}

.tag__text { white-space: nowrap; }

.margin-note {
  font-size: 13px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--ink-2);
  border-left: 3px solid var(--sunset);
  padding-left: 12px;
}

.margin-note--rot {
  writing-mode: vertical-rl;
  border-left: 0;
  border-right: 3px solid var(--sunset);
  padding-left: 0;
  padding-right: 12px;
  letter-spacing: 0.24em;
}

.stat {
  display: grid;
  gap: 2px;
}

.stat__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.6rem, 3.4vw, 2.7rem);
  line-height: 1;
  color: var(--sunset-ink);
}

.stat__label {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--ink-2);
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  border: var(--bd);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.05em;
  box-shadow: var(--shadow-soft);
  transition: transform 0.18s ease, box-shadow 0.18s ease,
    background-color 0.18s ease, color 0.18s ease;
}

.btn:hover {
  transform: translate(-2px, -3px);
  box-shadow: var(--shadow-mid);
}

.btn:active {
  transform: translate(0, 0);
  box-shadow: 1px 1px 0 var(--ink);
}

.btn--primary { background: var(--sunset); color: var(--ink); }
.btn--primary:hover { background: var(--sunset-ink); }

.btn--volt { background: var(--volt); color: var(--ink); }

.btn--dark {
  background: var(--ink);
  color: var(--volt);
  box-shadow: 3px 3px 0 var(--sunset);
}
.btn--dark:hover { box-shadow: 5px 5px 0 var(--sunset); }

.btn--ghost {
  background: transparent;
  box-shadow: none;
}
.btn--ghost:hover {
  background: var(--paper);
  box-shadow: var(--shadow-soft);
}

/* ---------- 8. 卡片 / 折叠面板 / 页签 / 筛选 ---------- */
.card {
  background: var(--paper);
  border: var(--bd);
  box-shadow: var(--shadow-hard);
  padding: clamp(18px, 2.6vw, 30px);
}

.card--raise {
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.card--raise:hover {
  transform: translateY(-3px);
  box-shadow: 9px 9px 0 var(--ink);
}

.panel {
  border: var(--bd);
  background: var(--paper);
  box-shadow: var(--shadow-soft);
}

.panel + .panel { margin-top: 12px; }

.panel__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 16px 20px;
  background: var(--paper);
  text-align: left;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.02em;
  transition: background-color 0.18s ease;
}

.panel__trigger:hover { background: var(--sand); }

.panel__mark {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  border: var(--bd);
  background: var(--volt);
}

.panel__mark::before,
.panel__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--ink);
}

.panel__mark::before {
  width: 10px;
  height: 2px;
  transform: translate(-50%, -50%);
}

.panel__mark::after {
  width: 2px;
  height: 10px;
  transform: translate(-50%, -50%);
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.panel__trigger[aria-expanded="true"] .panel__mark::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}

.panel__body {
  padding: 0 20px 20px;
  font-size: 15.5px;
  color: var(--ink-2);
}

.panel__body[hidden] { display: none; }

.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-bottom: var(--bd);
}

.tabs__tab {
  padding: 11px 22px;
  border: var(--bd);
  border-bottom: 0;
  background: var(--sand);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: background-color 0.18s ease, color 0.18s ease;
}

.tabs__tab:hover { background: var(--sand-deep); }

.tabs__tab[aria-selected="true"] {
  background: var(--sunset);
  color: var(--ink);
  box-shadow: inset 0 -4px 0 var(--ink);
}

.tabs__panel {
  border: var(--bd);
  border-top: 0;
  background: var(--paper);
  padding: clamp(16px, 2.4vw, 28px);
}

.tabs__panel[hidden] { display: none; }

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip {
  padding: 8px 16px;
  border: var(--bd);
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.03em;
  transition: background-color 0.18s ease, color 0.18s ease,
    transform 0.18s ease;
}

.chip:hover { transform: translateY(-2px); }

.chip[aria-pressed="true"],
.chip.is-active {
  background: var(--ink);
  color: var(--volt);
}

/* ---------- 9. 表格 / 时间轴 ---------- */
.tbl {
  width: 100%;
  background: var(--paper);
  border: var(--bd);
  font-size: 15px;
}

.tbl caption {
  caption-side: top;
  text-align: left;
  padding-bottom: 10px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--ink-2);
}

.tbl th {
  background: var(--ink);
  color: var(--paper);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-align: left;
  padding: 10px 14px;
  white-space: nowrap;
}

.tbl td {
  padding: 10px 14px;
  border-top: 1px solid var(--hairline);
  vertical-align: top;
  line-height: 1.7;
}

.tbl tbody tr:nth-child(odd) { background: var(--sand); }
.tbl tbody tr:nth-child(even) { background: var(--paper); }

.tbl .is-new {
  background: var(--volt);
  color: var(--ink);
  font-weight: 800;
}

.tbl .is-old {
  color: var(--brick);
  font-family: var(--font-mono);
}

.timeline {
  position: relative;
  display: grid;
  gap: 22px;
  padding-left: 30px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 6px;
  bottom: 6px;
  width: 3px;
  background: var(--ink);
}

.timeline__item {
  position: relative;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 8px;
  width: 13px;
  height: 13px;
  background: var(--turf);
  border: var(--bd);
}

/* ---------- 10. 图片容器 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border: var(--bd);
  background-color: var(--sand);
  background-image:
    repeating-linear-gradient(-45deg, rgba(38, 38, 42, 0.07) 0 2px, transparent 2px 12px),
    repeating-linear-gradient(45deg, rgba(228, 97, 15, 0.1) 0 2px, transparent 2px 18px);
  aspect-ratio: 16 / 10;
}

.media > img,
.media > svg,
.media > video,
.media > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.media__slot {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ink-2);
  text-align: center;
  padding: 12px;
}

.media__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  background: var(--ink);
  color: var(--volt);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  padding: 6px 12px;
}

/* ---------- 11. 面包屑与正文 ---------- */
.crumb {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ink-2);
}

.crumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.crumb__link {
  border-bottom: 1px solid rgba(76, 76, 82, 0.45);
  transition: color 0.16s ease, border-color 0.16s ease;
}

.crumb__link:hover {
  color: var(--sunset-ink);
  border-bottom-color: var(--sunset-ink);
}

.crumb__sep { color: var(--sunset); }

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

.prose {
  max-width: 66ch;
}

.prose p { margin-bottom: 1.2em; }

.prose h2,
.prose h3 { margin: 1.6em 0 0.6em; }

.prose a {
  color: var(--sunset-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose ul,
.prose ol {
  display: grid;
  gap: 0.6em;
  margin-bottom: 1.2em;
}

.prose ul li {
  position: relative;
  padding-left: 22px;
}

.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 10px;
  background: var(--sunset);
}

.prose ol { counter-reset: pnum; }

.prose ol li {
  position: relative;
  padding-left: 30px;
  counter-increment: pnum;
}

.prose ol li::before {
  content: counter(pnum, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--sunset-ink);
}

/* ---------- 12. 页头 ---------- */
.masthead {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--sand);
  border-bottom: var(--bd);
}

.masthead__strip {
  background: var(--ink);
  color: var(--sand);
}

.masthead__strip-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 8px;
  font-size: 12px;
  letter-spacing: 0.16em;
}

.masthead__region {
  color: rgba(245, 238, 227, 0.82);
  white-space: nowrap;
}

.masthead__ticker {
  color: var(--volt);
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.masthead__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  padding-block: clamp(14px, 2.4vw, 26px);
  transition: padding-block 0.22s ease;
}

.masthead__kicker {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--ink-2);
  white-space: nowrap;
}

.masthead__brand {
  grid-column: 2;
  display: grid;
  justify-items: center;
  gap: 5px;
  text-align: center;
  padding: 4px 10px;
}

.masthead__wordmark {
  display: inline-block;
  font-size: clamp(1.5rem, 3.2vw, 2.5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: 0.08em;
  transition: box-shadow 0.18s ease;
}

.masthead__brand:hover .masthead__wordmark,
.masthead__brand:focus-visible .masthead__wordmark {
  box-shadow: inset 0 -0.42em 0 var(--volt);
}

.masthead__note {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--sunset-ink);
}

.masthead__aside {
  grid-column: 3;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.masthead__quick {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border: var(--bd);
  background: var(--ink);
  color: var(--volt);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.06em;
  white-space: nowrap;
  box-shadow: var(--shadow-soft);
  transition: transform 0.18s ease, box-shadow 0.18s ease,
    background-color 0.18s ease, color 0.18s ease;
}

.masthead__quick:hover {
  transform: translate(-1px, -3px);
  box-shadow: var(--shadow-mid);
  background: var(--sunset);
  color: var(--ink);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 10px 14px;
  border: var(--bd);
  background: var(--paper);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  box-shadow: var(--shadow-soft);
}

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
  transition: background-color 0.18s ease;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--ink);
  transition: transform 0.2s ease, top 0.2s ease;
}

.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  top: 0;
  transform: rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  top: 0;
  transform: rotate(-45deg);
}

.site-nav {
  display: block;
  background: var(--sand);
  border-top: var(--bd);
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: clamp(10px, 2.6vw, 38px);
  padding-block: 10px;
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 6px 2px;
  font-size: clamp(14px, 1.4vw, 16px);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink);
  transition: color 0.16s ease;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: var(--sunset);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.18s ease;
}

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after { transform: scaleX(1); }

.site-nav__link[aria-current="page"] {
  color: var(--sunset-ink);
}

.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--ink);
}

.masthead__progress {
  height: 4px;
  background: rgba(38, 38, 42, 0.14);
  overflow: hidden;
}

.masthead__progress-fill {
  display: block;
  width: 0;
  height: 100%;
  background: var(--sunset);
}

/* 收拢状态 */
.masthead.is-stuck .masthead__strip { display: none; }
.masthead.is-stuck .masthead__inner { padding-block: 7px; }
.masthead.is-stuck .masthead__kicker { display: none; }
.masthead.is-stuck .masthead__note { display: none; }
.masthead.is-stuck .masthead__wordmark { font-size: clamp(1.15rem, 1.9vw, 1.55rem); }

/* ---------- 13. 页脚 ---------- */
.site-foot {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
  background: var(--ink);
  color: var(--sand);
  border-top: 6px solid var(--sunset);
}

.site-foot__band {
  height: 14px;
  background-image: repeating-linear-gradient(
    -45deg,
    var(--sunset) 0 8px,
    rgba(245, 238, 227, 0) 8px 20px
  );
  border-bottom: 1px solid var(--hairline-light);
}

.site-foot__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.6fr);
  gap: clamp(28px, 5vw, 64px);
  padding-block: clamp(36px, 6vw, 66px);
}

.foot-brand__name {
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 0.06em;
  color: var(--paper);
}

.foot-brand__note {
  margin-top: 14px;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(245, 238, 227, 0.72);
}

.foot-region {
  display: inline-block;
  margin-top: 18px;
  padding: 5px 12px;
  border: 2px solid var(--volt);
  color: var(--volt);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.site-foot__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 36px);
}

.foot-col__title {
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--hairline-light);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--sunset);
}

.foot-col__list {
  display: grid;
  gap: 9px;
}

.foot-col__list li {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(245, 238, 227, 0.78);
  word-break: break-word;
}

.foot-col__link {
  color: rgba(245, 238, 227, 0.84);
  border-bottom: 1px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.foot-col__link:hover,
.foot-col__link:focus-visible {
  color: var(--volt);
  border-bottom-color: var(--volt);
}

.site-foot__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 26px;
  padding-block: 20px;
  border-top: 2px solid var(--hairline-light);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: rgba(245, 238, 227, 0.62);
}

.foot-legal { font-family: var(--font-mono); }
.foot-copy { font-family: var(--font-mono); }
.foot-note { color: rgba(245, 238, 227, 0.5); }

/* ---------- 14. 滚动显现 ---------- */
.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.12s linear, transform 0.12s linear;
}

.has-js [data-reveal].is-in {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1100px) {
  .col-3 { grid-column: span 5; }
  .col-4 { grid-column: span 6; }
  .col-5 { grid-column: span 7; }
  .col-7 { grid-column: span 8; }
  .col-8 { grid-column: span 9; }
  .col-9 { grid-column: span 10; }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 120px; }

  .grid-12 { grid-template-columns: minmax(0, 1fr); }
  .col-3, .col-4, .col-5, .col-6,
  .col-7, .col-8, .col-9, .col-12 { grid-column: span 1; }

  .slab { clip-path: polygon(0 0, 100% 2%, 100% 100%, 0 98%); }

  /* 页头收为两栏 */
  .masthead__strip-inner {
    justify-content: flex-start;
    font-size: 11px;
    letter-spacing: 0.12em;
  }

  .masthead__ticker { display: none; }

  .masthead__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    padding-block: 12px;
  }

  .masthead__kicker { display: none; }

  .masthead__brand {
    grid-column: 1;
    justify-items: start;
    text-align: left;
    padding-left: 0;
  }

  .masthead__wordmark { letter-spacing: 0.04em; }
  .masthead__note { letter-spacing: 0.18em; }
  .masthead__aside { grid-column: 2; }

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

  /* 移动导航折叠 */
  .site-nav {
    max-height: 0;
    overflow: hidden;
    border-top-width: 0;
    transition: max-height 0.24s ease;
  }

  .site-nav[data-open] {
    max-height: 560px;
    border-top-width: 2px;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-block: 6px;
  }

  .site-nav__item {
    border-bottom: 2px solid rgba(38, 38, 42, 0.12);
  }

  .site-nav__item:last-child { border-bottom: 0; }

  .site-nav__link {
    display: block;
    padding: 13px 4px;
    font-size: 17px;
    letter-spacing: 0.06em;
  }

  .site-nav__link::after { display: none; }

  .site-nav__link[aria-current="page"] {
    border-left: 6px solid var(--sunset);
    padding-left: 12px;
  }

  /* 页脚单列 */
  .site-foot__inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .site-foot__cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }

  .site-foot__base {
    justify-content: flex-start;
  }
}

@media (max-width: 560px) {
  body { font-size: 16px; }

  .nav-toggle__text { display: none; }
  .nav-toggle { padding: 10px 11px; }

  .masthead__quick { padding: 9px 12px; font-size: 13px; }
  .masthead__wordmark { font-size: 1.35rem; }

  .site-foot__cols { grid-template-columns: minmax(0, 1fr); }

  .tabs__tab { padding: 10px 14px; font-size: 14px; }

  .tbl { font-size: 14px; }
  .tbl th, .tbl td { padding: 9px 10px; }
}

/* ---------- 16. 降低动效 ---------- */
@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;
  }

  .btn:hover,
  .card--raise:hover,
  .masthead__quick:hover,
  .chip:hover {
    transform: none !important;
  }

  .has-js [data-reveal],
  .has-js [data-reveal].is-in {
    opacity: 1 !important;
    transform: none !important;
  }
}