/* 28体育赛场 · /assets/site.css · 共享外壳与基础组件 */

:root {
  --ink-900: #0B1F1A;
  --ink-800: #142E27;
  --ink-700: #1B3A31;
  --paper: #F3EFE4;
  --cool: #C7D1CC;
  --char: #0A0F0D;
  --red: #D93025;
  --red-bright: #FF5A4E;
  --yellow: #F5C542;
  --yellow-deep: #C79A16;
  --cyan: #45FFE3;
  --gray: #7C8A84;
  --line: rgba(199, 209, 204, 0.28);
  --line-strong: rgba(199, 209, 204, 0.5);
  --shadow-hard: 8px 8px 0 rgba(10, 15, 13, 0.55);
  --shadow-soft: 6px 6px 0 rgba(10, 15, 13, 0.45);
  --font-display: "Arial Narrow", "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-body: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --max: 1240px;
  --gap: 24px;
  --pad: clamp(16px, 4vw, 32px);
}

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

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

body {
  margin: 0;
  background-color: var(--ink-900);
  background-image: repeating-linear-gradient(90deg, rgba(199, 209, 204, 0.022) 0 1px, transparent 1px 88px);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.008em;
  -webkit-font-smoothing: antialiased;
}

body.nav-open { overflow: hidden; }

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

ul, ol { margin: 0 0 1em; padding-left: 1.2em; }
ul:last-child, ol:last-child { margin-bottom: 0; }

a {
  color: inherit;
  text-decoration-color: var(--red-bright);
  text-underline-offset: 3px;
}

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

strong { font-weight: 700; color: var(--paper); }

::selection { background: var(--yellow); color: var(--char); }

:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 跳过链接与阅读进度 ---------- */

.skip-link {
  position: fixed;
  top: 0;
  left: 8px;
  z-index: 500;
  transform: translateY(-120%);
  padding: 10px 18px;
  background: var(--yellow);
  color: var(--char);
  font-weight: 700;
  font-size: 14px;
  border: 2px solid var(--char);
  box-shadow: 4px 4px 0 var(--red);
  text-decoration: none;
  transition: transform 0.18s ease;
}
.skip-link:focus { transform: translateY(0); }

.read-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 400;
  background: rgba(199, 209, 204, 0.14);
  pointer-events: none;
}
.read-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--red), var(--yellow) 70%, var(--cyan));
  transition: transform 0.1s linear;
}

/* ---------- 头部：双层信息轨 ---------- */

.site-header { position: relative; z-index: 100; }

.header-rail {
  background: var(--char);
  border-bottom: 2px solid var(--line);
  color: var(--cool);
}
.header-rail__inner {
  max-width: var(--max);
  margin-inline: auto;
  padding: 7px var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand-sign {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--paper);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.brand-sign__mark {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 22px;
  border: 2px solid var(--yellow);
  background: rgba(245, 197, 66, 0.1);
  color: var(--yellow);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
}
.brand-sign__text em {
  font-style: normal;
  color: var(--gray);
  margin-left: 8px;
  padding-left: 8px;
  border-left: 1px solid var(--line-strong);
  letter-spacing: 0.1em;
}

.quick-nav { display: flex; align-items: center; gap: 18px; }
.quick-link {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--cool);
  text-decoration: none;
  border-bottom: 1px dashed transparent;
  padding-bottom: 1px;
  transition: color 0.16s ease, border-color 0.16s ease;
}
.quick-link:hover, .quick-link:focus-visible { color: var(--yellow); border-bottom-color: var(--yellow); }

.header-main {
  position: sticky;
  top: 0;
  z-index: 90;
  background: var(--ink-900);
  border-bottom: 3px solid var(--char);
  box-shadow: 0 6px 0 rgba(10, 15, 13, 0.35);
}
.header-main__inner {
  max-width: var(--max);
  margin-inline: auto;
  padding: 12px var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--paper);
  flex: 0 0 auto;
}
.brand-lockup__num {
  display: inline-block;
  padding: 0 9px;
  font-family: var(--font-mono);
  font-size: 25px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--char);
  background: var(--yellow);
  border: 2px solid var(--char);
  box-shadow: 4px 4px 0 var(--red);
}
.brand-lockup__label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.brand-lockup__dot { color: var(--red-bright); margin: 0 6px; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 8px 13px;
  background: var(--ink-800);
  color: var(--paper);
  border: 2px solid var(--line-strong);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  cursor: pointer;
}
.nav-toggle__bars { display: inline-flex; flex-direction: column; gap: 4px; width: 18px; }
.nav-toggle__bars span { display: block; height: 2px; background: var(--yellow); }
.nav-toggle[aria-expanded="true"] { background: var(--red); border-color: var(--char); color: #fff; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span { background: #fff; }

.primary-nav { display: flex; align-items: center; gap: 8px; }
.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-item { margin: 0; }
.nav-link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 9px 12px;
  border: 2px solid transparent;
  color: var(--cool);
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none;
  transition: color 0.16s ease, background-color 0.16s ease, border-color 0.16s ease;
}
.nav-link__idx {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--yellow-deep);
}
.nav-link:hover, .nav-link:focus-visible {
  color: var(--paper);
  background: rgba(199, 209, 204, 0.07);
  border-color: var(--line);
}
.nav-link[aria-current="page"] {
  background: var(--red);
  color: #fff;
  border-color: var(--char);
  box-shadow: 4px 4px 0 rgba(10, 15, 13, 0.6);
}
.nav-link[aria-current="page"] .nav-link__idx { color: var(--yellow); }

.nav-cta {
  margin-left: 10px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  background: var(--yellow);
  color: var(--char);
  border: 2px solid var(--char);
  box-shadow: 4px 4px 0 var(--red);
  font-size: 13.5px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}
.nav-cta:hover, .nav-cta:focus-visible { transform: translate(-2px, -2px); box-shadow: 6px 6px 0 var(--red); }

.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 94;
  background: rgba(10, 15, 13, 0.68);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease;
}
.nav-scrim[data-visible="true"] { opacity: 1; pointer-events: auto; }

/* ---------- 页脚：战术板 ---------- */

.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
  background: var(--ink-900);
  border-top: 3px solid var(--yellow);
  color: var(--cool);
  overflow: hidden;
}
.footer-scrim {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(135deg, rgba(199, 209, 204, 0.045) 0 2px, transparent 2px 14px);
}
.footer-inner {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  margin-inline: auto;
  padding: clamp(32px, 5vw, 56px) var(--pad) 22px;
}
.footer-top {
  display: grid;
  grid-template-columns: minmax(220px, 0.85fr) 2.3fr;
  gap: clamp(24px, 4vw, 52px);
  padding-bottom: 26px;
  border-bottom: 2px solid var(--line);
}
.footer-brand__mark {
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 46px;
  background: var(--yellow);
  color: var(--char);
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 700;
  border: 2px solid var(--char);
  box-shadow: 4px 4px 0 var(--red);
}
.footer-brand__name {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  color: var(--paper);
  letter-spacing: -0.01em;
}
.footer-brand__line { margin: 8px 0 0; font-size: 14.5px; color: var(--cool); }
.footer-brand__meta {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--yellow-deep);
}
.footer-cols {
  display: grid;
  grid-template-columns: 0.85fr 1.5fr 0.85fr;
  gap: clamp(20px, 3vw, 38px);
}
.footer-col { min-width: 0; }
.footer-heading {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--cyan);
  padding-bottom: 9px;
  margin-bottom: 14px;
  border-bottom: 2px solid var(--line);
}
.footer-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 9px; font-size: 14px; }
.footer-list a {
  color: var(--cool);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}
.footer-list a:hover, .footer-list a:focus-visible { color: var(--paper); border-bottom-color: var(--red-bright); }
.footer-list--plain li {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 8px;
  color: var(--paper);
  font-size: 13.5px;
  line-height: 1.7;
  word-break: break-word;
}
.footer-key {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--gray);
  padding-top: 2px;
}
.footer-note {
  margin: 14px 0 0;
  padding-left: 11px;
  border-left: 3px solid var(--yellow-deep);
  font-size: 12px;
  line-height: 1.7;
  color: var(--gray);
}
.footer-icp {
  display: inline-block;
  margin: 16px 0 0;
  padding: 4px 10px;
  border: 2px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--paper);
}
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 22px;
  padding-top: 18px;
  font-size: 12px;
  color: var(--gray);
}
.footer-bottom p { margin: 0; }
.footer-bottom__note { color: var(--gray); }

.to-top {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: transparent;
  color: var(--paper);
  border: 2px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}
.to-top:hover, .to-top:focus-visible { background: var(--yellow); color: var(--char); border-color: var(--char); }

/* ---------- 容器与栅格 ---------- */

.container {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--pad);
}
.container--narrow { max-width: 860px; }

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}
.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-9 { grid-column: span 9; }
.span-10 { grid-column: span 10; }
.span-12 { grid-column: span 12; }

/* ---------- 面板 ---------- */

.panel {
  position: relative;
  background: var(--ink-800);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
  padding: clamp(18px, 2.4vw, 32px);
}
.panel--paper { background: var(--paper); color: var(--char); border-color: var(--char); box-shadow: 8px 8px 0 var(--red); }
.panel--paper .eyebrow { color: #0F6B5C; }
.panel--red { background: var(--red); color: #fff; border-color: var(--char); box-shadow: var(--shadow-hard); }
.panel--red .eyebrow { color: var(--yellow); }
.panel-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 12px;
  margin-bottom: 18px;
  border-bottom: 2px solid var(--line);
}
.panel--paper .panel-head { border-bottom-color: rgba(10, 15, 13, 0.25); }
.panel-stack { display: flex; flex-direction: column; }
.panel-stack > .panel + .panel { margin-top: -8px; }

/* ---------- 排版零件 ---------- */

.display-title {
  font-family: var(--font-display);
  font-size: clamp(40px, 6.4vw, 58px);
  line-height: 1.06;
  letter-spacing: -0.035em;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(23px, 3vw, 32px);
  line-height: 1.16;
  letter-spacing: -0.02em;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}
.eyebrow::before { content: ""; width: 18px; height: 2px; background: currentColor; }
.vertical-note {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.36em;
  color: var(--gray);
}
.num, .mono { font-family: var(--font-mono); }

.stat { display: flex; flex-direction: column; gap: 2px; }
.stat__value {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan);
}
.stat__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gray);
}

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  background: var(--paper);
  color: var(--char);
  border: 2px solid var(--char);
  box-shadow: var(--shadow-soft);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.16s ease, box-shadow 0.16s ease, background-color 0.16s ease, color 0.16s ease;
}
.btn:hover, .btn:focus-visible { transform: translate(-2px, -2px); box-shadow: 8px 8px 0 rgba(10, 15, 13, 0.6); }
.btn:active { transform: translate(2px, 2px); box-shadow: 2px 2px 0 rgba(10, 15, 13, 0.6); }
.btn--primary { background: var(--red); color: #fff; }
.btn--yellow { background: var(--yellow); color: var(--char); }
.btn--ghost { background: transparent; color: var(--paper); border-color: var(--cool); box-shadow: 6px 6px 0 rgba(69, 255, 227, 0.18); }
.btn--sm { padding: 8px 14px; font-size: 13px; box-shadow: 4px 4px 0 rgba(10, 15, 13, 0.5); }

/* ---------- 标签 ---------- */

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  background: var(--cool);
  color: var(--char);
  border: 2px solid var(--char);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  line-height: 1.5;
  text-decoration: none;
}
.tag--red { background: var(--red); color: #fff; }
.tag--yellow { background: var(--yellow); color: var(--char); }
.tag--cyan { background: var(--cyan); color: var(--char); }
.tag--outline { background: transparent; color: var(--cool); border-color: var(--line-strong); }

/* ---------- 面包屑 ---------- */

.breadcrumb { font-size: 12.5px; color: var(--gray); }
.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
}
.breadcrumb-list li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb-list li + li::before { content: "/"; color: var(--red-bright); }
.breadcrumb-list a { color: var(--cool); text-decoration: none; border-bottom: 1px solid transparent; }
.breadcrumb-list a:hover, .breadcrumb-list a:focus-visible { color: var(--paper); border-bottom-color: var(--red-bright); }
.breadcrumb-list [aria-current="page"] { color: var(--paper); }

/* ---------- 图片容器 ---------- */

.media-frame {
  position: relative;
  background: var(--ink-700);
  border: 2px solid var(--char);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  aspect-ratio: 16 / 10;
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.06);
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  max-width: 100%;
  padding: 4px 10px;
  background: var(--char);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

/* ---------- 左侧时间轴 ---------- */

.rail { display: flex; flex-direction: column; gap: 2px; }
.rail-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 10px;
  margin-left: -3px;
  border-left: 3px solid transparent;
  color: var(--gray);
  font-size: 13.5px;
  text-decoration: none;
  transition: color 0.16s ease, border-color 0.16s ease, background-color 0.16s ease;
}
.rail-link__num { font-family: var(--font-mono); font-size: 11px; color: var(--yellow-deep); }
.rail-link:hover, .rail-link:focus-visible { color: var(--paper); border-left-color: var(--cool); }
.rail-link[aria-current="true"] {
  color: var(--paper);
  background: rgba(217, 48, 37, 0.16);
  border-left-color: var(--red);
}
.rail-link[aria-current="true"] .rail-link__num { color: var(--yellow); }

/* ---------- 表格 ---------- */

.table-base { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.table-base caption {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gray);
  padding-bottom: 8px;
}
.table-base th, .table-base td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--line); }
.table-base thead th {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  border-bottom: 2px solid var(--line-strong);
  white-space: nowrap;
}
.table-base tbody tr:hover { background: rgba(199, 209, 204, 0.06); }
.table-base .num { color: var(--paper); }

/* ---------- 手风琴 ---------- */

.accordion { background: var(--ink-800); border: 2px solid var(--line); }
.accordion + .accordion { margin-top: 10px; }
.accordion__btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 18px;
  background: none;
  border: 0;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 15.5px;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
}
.accordion__btn:hover { color: var(--yellow); }
.accordion__icon {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--yellow);
  transition: transform 0.2s ease;
}
.accordion[data-open="true"] .accordion__icon { transform: rotate(45deg); }
.accordion[data-open="true"] { border-color: var(--line-strong); box-shadow: 5px 5px 0 rgba(10, 15, 13, 0.5); }
.accordion__panel { padding: 0 18px 18px; color: var(--cool); font-size: 14.5px; }
.accordion__panel[hidden] { display: none; }

/* ---------- 筛选标签 ---------- */

.filter-bar { display: flex; flex-wrap: wrap; gap: 8px; }
.filter-chip {
  padding: 7px 13px;
  background: transparent;
  color: var(--cool);
  border: 2px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}
.filter-chip:hover { color: var(--paper); border-color: var(--cool); }
.filter-chip[aria-pressed="true"] { background: var(--yellow); color: var(--char); border-color: var(--char); }

/* ---------- 卡片 ---------- */

.card {
  background: var(--ink-800);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-soft);
  padding: 18px;
}
.card__title {
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.25;
  margin: 0 0 8px;
  color: var(--paper);
}

/* ---------- 进入视口 ---------- */

.reveal { transition: opacity 0.24s ease, transform 0.24s ease; }
.reveal.is-pending { opacity: 0; transform: translateY(12px); }
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- 平板 ---------- */

@media (max-width: 1080px) {
  .footer-top { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: 0.9fr 1.4fr 0.9fr; }
}

@media (max-width: 980px) {
  .nav-link { padding: 8px 9px; font-size: 13.5px; }
  .nav-link__idx { display: none; }
  .brand-lockup__label { font-size: 15.5px; }
  .footer-cols { grid-template-columns: 1fr 1fr; }
  .footer-col--legal { grid-column: 1 / -1; }
}

/* ---------- 移动端：抽屉导航 ---------- */

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }
  .primary-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: auto;
    z-index: 96;
    width: min(336px, 88vw);
    padding: 88px 20px 32px;
    background: var(--ink-800);
    border-left: 3px solid var(--char);
    box-shadow: -10px 0 0 rgba(10, 15, 13, 0.45);
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    overflow-y: auto;
    transform: translateX(104%);
    transition: transform 0.26s ease;
  }
  .primary-nav[data-open="true"] { transform: translateX(0); }
  .nav-list { flex-direction: column; align-items: stretch; gap: 2px; }
  .nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: 13px 12px;
    font-size: 16px;
    border-bottom: 2px solid var(--line);
  }
  .nav-link__idx { display: inline; }
  .nav-cta { margin: 18px 0 0; width: 100%; justify-content: center; padding: 13px 16px; font-size: 15px; }

  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .span-3, .span-4, .span-5, .span-6, .span-7, .span-8, .span-9, .span-10, .span-12 { grid-column: span 6; }
}

@media (max-width: 720px) {
  .quick-nav { display: none; }
  .header-rail__inner { padding-block: 6px; }
  .brand-sign__text em { display: none; }
  .footer-cols { grid-template-columns: 1fr; }
  .footer-col--legal { grid-column: auto; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .panel-head { flex-direction: column; align-items: flex-start; gap: 10px; }
  .panel--paper, .panel { box-shadow: 5px 5px 0 rgba(10, 15, 13, 0.5); }
  .panel--paper { box-shadow: 5px 5px 0 var(--red); }
}

@media (max-width: 420px) {
  .brand-lockup__label { font-size: 14px; }
  .brand-lockup__num { font-size: 21px; padding: 0 7px; }
  .btn { width: 100%; }
}

/* ---------- 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;
  }
  .reveal, .reveal.is-pending { opacity: 1; transform: none; }
  .primary-nav { transition: none; }
}