/* ============================================================
   立即博体育站 · 共享样式 /assets/site.css
   框架式导航 · 战术板网格 · 档案式组件
   ============================================================ */

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

:root {
  /* 色彩 */
  --deep: #071A2F;
  --graphite: #1B222B;
  --panel: #242E3A;
  --cyan: #23F0D0;
  --orange: #FF6B2C;
  --violet: #7A5CFF;
  --ice: #D7F7F2;
  --ink: #F2F7FA;
  --muted: #9AA9B8;
  --ok: #37D67A;
  --warn: #FFC857;

  /* 线条 */
  --line: rgba(154, 169, 184, .18);
  --line-soft: rgba(154, 169, 184, .10);
  --line-cyan: rgba(35, 240, 208, .34);
  --line-signal: rgba(255, 107, 44, .42);

  /* 尺寸 */
  --rail-w: 172px;
  --bar-h: 64px;
  --gutter: clamp(20px, 4vw, 48px);

  /* 字体 */
  --ff-serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --ff-sans: Inter, "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --ff-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 动效 */
  --ease: cubic-bezier(.22, .61, .36, 1);
  --fast: .16s;
  --mid: .24s;
}

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

body {
  margin: 0;
  font-family: var(--ff-sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background-color: var(--deep);
  background-image:
    radial-gradient(120% 90% at 8% -10%, rgba(35, 240, 208, .10), transparent 58%),
    radial-gradient(90% 80% at 100% 0%, rgba(122, 92, 255, .13), transparent 60%),
    linear-gradient(178deg, #071A2F 0%, #081B2E 46%, #0B1620 100%);
  background-attachment: fixed;
  padding-left: var(--rail-w);
  padding-top: var(--bar-h);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(154, 169, 184, .06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(154, 169, 184, .06) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(120% 100% at 50% 0%, #000 20%, transparent 88%);
  mask-image: radial-gradient(120% 100% at 50% 0%, #000 20%, transparent 88%);
}

h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; }
img, svg, video { max-width: 100%; display: block; }
a { color: inherit; }
button { font: inherit; color: inherit; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

::selection {
  background: rgba(35, 240, 208, .28);
  color: #FFFFFF;
}

main,
#main-content {
  position: relative;
  z-index: 1;
}

#main-content {
  scroll-margin-top: calc(var(--bar-h) + 12px);
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: calc(var(--rail-w) + 16px);
  z-index: 200;
  padding: 10px 18px;
  background: var(--cyan);
  color: var(--deep);
  font-family: var(--ff-sans);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  line-height: 1.2;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform var(--fast) var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
}

/* ---------- 顶部框架横带 ---------- */
.frame-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 80;
  height: var(--bar-h);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 16px;
  background: linear-gradient(92deg, #05141F 0%, #071A2F 42%, #0C2338 100%);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 1px 0 rgba(35, 240, 208, .16), 0 22px 50px -34px #000000;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
  height: 100%;
  padding-right: 16px;
  border-right: 1px solid var(--line);
  color: var(--ink);
  text-decoration: none;
}

.brand-mark {
  position: relative;
  width: 30px;
  height: 30px;
  flex: 0 0 auto;
  background:
    linear-gradient(180deg, rgba(35, 240, 208, .20), rgba(35, 240, 208, .04)),
    #0A2439;
  border: 1px solid var(--line-cyan);
  clip-path: polygon(0 0, 74% 0, 100% 26%, 100% 100%, 0 100%);
}

.brand-mark::before {
  content: "";
  position: absolute;
  top: 8px;
  right: 7px;
  width: 12px;
  height: 2px;
  background: var(--orange);
}

.brand-mark::after {
  content: "";
  position: absolute;
  left: 7px;
  bottom: 8px;
  width: 16px;
  height: 2px;
  background: var(--cyan);
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 3px;
  line-height: 1;
}

.brand-name {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .04em;
}

.brand-sub {
  font-family: var(--ff-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .16em;
  color: var(--muted);
}

.frame-quick {
  display: flex;
  align-items: center;
  height: 100%;
  margin-left: 2px;
  border-left: 1px solid var(--line-soft);
}

.quick-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 100%;
  padding: 0 15px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  border-right: 1px solid var(--line-soft);
  transition: color var(--fast) var(--ease), background-color var(--fast) var(--ease);
}

.quick-link::before {
  content: "";
  width: 5px;
  height: 5px;
  border: 1px solid currentColor;
  transform: rotate(45deg);
  opacity: .7;
}

.quick-link:hover,
.quick-link:focus-visible {
  color: var(--cyan);
  background-color: rgba(35, 240, 208, .07);
}

.frame-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ---------- 按钮 ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 44px;
  padding: 0 24px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--ink);
  font-family: var(--ff-sans);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .06em;
  text-decoration: none;
  cursor: pointer;
  transition:
    background-color var(--fast) var(--ease),
    color var(--fast) var(--ease),
    border-color var(--fast) var(--ease),
    transform var(--fast) var(--ease);
}

.btn:active { transform: translateY(1px); }

.btn--primary {
  padding-right: 34px;
  background: var(--orange);
  color: var(--deep);
}

.btn--primary::after {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  right: 16px;
  width: 5px;
  background: rgba(7, 26, 47, .32);
  transform: skewX(-16deg);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: #FF874F;
}

.btn--ghost {
  border-color: var(--line-cyan);
  background: rgba(35, 240, 208, .05);
  color: var(--cyan);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background: rgba(35, 240, 208, .13);
  border-color: var(--cyan);
}

.btn--sm {
  min-height: 34px;
  padding: 0 18px;
  font-size: 13px;
}

.btn--sm.btn--primary {
  padding-right: 30px;
}

.btn--sm.btn--primary::after {
  top: 6px;
  bottom: 6px;
  right: 13px;
  width: 4px;
}

/* ---------- 移动端抽屉开关 ---------- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  padding: 0 10px 0 9px;
  border: 1px solid var(--line);
  background: rgba(242, 247, 250, .06);
  color: var(--ink);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  cursor: pointer;
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  border-color: var(--line-cyan);
  color: var(--cyan);
}

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

.nav-toggle-box i {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform var(--mid) var(--ease), opacity var(--fast) var(--ease);
}

.nav-toggle-box i:nth-child(2) { width: 70%; }

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

.nav-toggle-text {
  line-height: 1;
}

/* ---------- 阅读进度 ---------- */
.frame-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
  pointer-events: none;
}

.frame-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--violet) 68%, var(--orange));
  transition: width .08s linear;
}

/* ---------- 抽屉遮罩 ---------- */
.nav-scrim {
  position: fixed;
  inset: var(--bar-h) 0 0 0;
  z-index: 65;
  background: rgba(4, 12, 22, .68);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--mid) var(--ease), visibility var(--mid);
}

.nav-scrim[data-open="true"] {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* ---------- 左侧框架导航 ---------- */
.frame-rail {
  position: fixed;
  top: var(--bar-h);
  left: 0;
  bottom: 0;
  z-index: 70;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 20px 0;
  background: linear-gradient(180deg, #061727 0%, #081B2E 55%, #0A1E31 100%);
  border-right: 1px solid var(--line);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.frame-rail::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 2px;
  height: 88px;
  background: linear-gradient(180deg, var(--cyan), transparent);
}

.rail-list {
  list-style: none;
}

.rail-list li {
  border-bottom: 1px solid var(--line-soft);
}

.rail-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 16px 13px 20px;
  border-left: 2px solid transparent;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .04em;
  text-decoration: none;
  transition:
    color var(--fast) var(--ease),
    background-color var(--fast) var(--ease),
    border-color var(--fast) var(--ease);
}

.rail-index {
  font-family: var(--ff-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .1em;
  color: rgba(154, 169, 184, .5);
  transition: color var(--fast) var(--ease);
}

.rail-link:hover,
.rail-link:focus-visible {
  color: var(--ink);
  background-color: rgba(35, 240, 208, .055);
  border-left-color: rgba(35, 240, 208, .45);
}

.rail-link:hover .rail-index,
.rail-link:focus-visible .rail-index {
  color: var(--cyan);
}

.rail-link[aria-current="page"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background-image: linear-gradient(90deg, rgba(35, 240, 208, .16), rgba(35, 240, 208, 0) 92%);
}

.rail-link[aria-current="page"] .rail-index {
  color: var(--cyan);
}

.rail-link[aria-current="page"]::after {
  content: "";
  margin-left: auto;
  width: 6px;
  height: 6px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.rail-foot {
  margin: 18px 16px 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--ff-mono);
  font-size: 10px;
  letter-spacing: .16em;
  color: rgba(154, 169, 184, .6);
}

/* ---------- 页脚 ---------- */
.site-foot {
  position: relative;
  z-index: 2;
  margin-top: clamp(48px, 8vw, 96px);
  background: linear-gradient(180deg, #081B2E 0%, #0A1927 55%, #050D17 100%);
  border-top: 1px solid var(--line);
}

.site-foot::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 128px;
  height: 2px;
  background: var(--cyan);
}

.fold {
  border-bottom: 1px solid var(--line);
  background: rgba(36, 46, 58, .42);
}

.fold-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 15px var(--gutter);
  border: 0;
  background: transparent;
  color: var(--ink);
  font-family: var(--ff-sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .05em;
  text-align: left;
  cursor: pointer;
  transition: background-color var(--fast) var(--ease), color var(--fast) var(--ease);
}

.fold-toggle:hover,
.fold-toggle:focus-visible {
  background: rgba(35, 240, 208, .06);
  color: var(--cyan);
}

.fold-label {
  padding: 4px 8px;
  border: 1px solid var(--line-cyan);
  background: rgba(35, 240, 208, .07);
  color: var(--cyan);
  font-family: var(--ff-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .2em;
  line-height: 1.4;
}

.fold-text {
  min-width: 0;
}

.fold-chevron {
  margin-left: auto;
  width: 9px;
  height: 9px;
  flex: 0 0 auto;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--mid) var(--ease);
}

.fold-toggle[aria-expanded="true"] .fold-chevron {
  transform: rotate(-135deg);
}

.fold-body {
  height: 0;
  overflow: hidden;
  transition: height var(--mid) var(--ease);
}

.fold-inner {
  padding: 0 var(--gutter) 22px;
  max-width: 74ch;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.foot-main {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) repeat(3, minmax(0, 1fr));
  gap: clamp(26px, 3.5vw, 52px);
  padding: clamp(38px, 6vw, 68px) var(--gutter) clamp(32px, 4vw, 46px);
}

.foot-brand-name {
  font-family: var(--ff-serif);
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--ink);
}

.foot-brand-text {
  margin-top: 12px;
  max-width: 34ch;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.foot-brand-meta {
  margin-top: 18px;
}

.foot-col-title {
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--ff-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .18em;
  color: var(--cyan);
}

.foot-links {
  list-style: none;
  display: grid;
  gap: 10px;
}

.foot-link {
  position: relative;
  display: inline-block;
  padding-left: 13px;
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--fast) var(--ease), padding-left var(--fast) var(--ease);
}

.foot-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 6px;
  height: 1px;
  background: currentColor;
  opacity: .65;
}

.foot-link:hover,
.foot-link:focus-visible {
  color: var(--cyan);
  padding-left: 17px;
}

.foot-info {
  list-style: none;
  display: grid;
  gap: 12px;
}

.foot-info li {
  display: grid;
  gap: 3px;
}

.foot-key {
  font-family: var(--ff-mono);
  font-size: 10px;
  letter-spacing: .16em;
  color: rgba(154, 169, 184, .72);
}

.foot-val {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.foot-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 26px;
  padding: 18px var(--gutter) 30px;
  border-top: 1px solid var(--line);
  font-family: var(--ff-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--muted);
}

.foot-copy,
.foot-icp,
.foot-note {
  margin: 0;
}

.foot-icp::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-right: 8px;
  background: var(--ok);
  transform: translateY(-1px);
}

.foot-note {
  margin-left: auto;
}

/* ---------- 通用容器与排版 ---------- */
.wrap {
  width: min(1180px, calc(100% - var(--gutter) * 2));
  margin-inline: auto;
}

.section {
  padding-block: clamp(44px, 7vw, 88px);
}

.section--flush {
  padding-block: 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--ff-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .22em;
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--cyan);
}

.display {
  margin: 0;
  font-family: var(--ff-serif);
  font-size: clamp(2.4rem, 6vw, 5.2rem);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--ink);
}

.display--sm {
  font-size: clamp(1.9rem, 3.6vw, 3.1rem);
  line-height: 1.1;
}

.lede {
  max-width: 56ch;
  font-size: clamp(16px, 1.5vw, 18.5px);
  line-height: 1.7;
  color: var(--muted);
}

.lede strong {
  color: var(--ink);
  font-weight: 600;
}

.rule {
  height: 1px;
  margin: 0;
  border: 0;
  background: var(--line);
}

/* ---------- 面板与标签 ---------- */
.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--panel);
  border: 1px solid var(--line);
}

.panel--signal { border-color: var(--line-signal); }
.panel--cyan { border-color: var(--line-cyan); }
.panel--flat { background: rgba(36, 46, 58, .5); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line-cyan);
  background: rgba(35, 240, 208, .08);
  color: var(--cyan);
  font-family: var(--ff-sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .08em;
  line-height: 1.5;
  text-decoration: none;
  white-space: nowrap;
}

.tag--signal {
  border-color: var(--line-signal);
  background: rgba(255, 107, 44, .1);
  color: var(--orange);
}

.tag--ice {
  border-color: var(--ice);
  background: var(--ice);
  color: var(--deep);
}

.tag--mute {
  border-color: var(--line);
  background: rgba(154, 169, 184, .08);
  color: var(--muted);
}

/* ---------- 网格与数据块 ---------- */
.grid {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
}

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

.stat {
  display: grid;
  gap: 3px;
}

.stat-num {
  font-family: var(--ff-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--cyan);
}

.stat-label {
  font-family: var(--ff-mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  color: var(--muted);
}

/* ---------- 面包屑 ---------- */
.crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  list-style: none;
  font-family: var(--ff-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--muted);
}

.crumb li {
  display: flex;
  align-items: center;
}

.crumb li + li::before {
  content: "/";
  margin-right: 10px;
  color: rgba(154, 169, 184, .5);
}

.crumb a {
  color: var(--muted);
  text-decoration: none;
  transition: color var(--fast) var(--ease);
}

.crumb a:hover,
.crumb a:focus-visible {
  color: var(--cyan);
}

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

/* ---------- 响应式图形容器 ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 120% at 0% 0%, rgba(35, 240, 208, .18), transparent 55%),
    radial-gradient(100% 100% at 100% 100%, rgba(122, 92, 255, .22), transparent 60%),
    linear-gradient(150deg, #0B2237, #14202C);
}

.media-frame img,
.media-frame svg {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(242, 247, 250, .06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(242, 247, 250, .06) 1px, transparent 1px);
  background-size: 32px 32px;
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--square { aspect-ratio: 1 / 1; }

/* ---------- 滚动显现 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
}

html.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
  transition: opacity .55s var(--ease), transform .55s var(--ease);
}

/* ---------- 平板 ---------- */
@media (max-width: 1100px) {
  .foot-main {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .foot-brand {
    grid-column: 1 / -1;
  }
}

/* ---------- 移动端：框架收为顶部抽屉 ---------- */
@media (max-width: 900px) {
  :root {
    --rail-w: 0px;
    --bar-h: 58px;
    --gutter: clamp(16px, 5vw, 28px);
  }

  body {
    padding-left: 0;
    padding-top: var(--bar-h);
    font-size: 16px;
  }

  .frame-bar {
    padding: 0 12px;
    gap: 10px;
  }

  .frame-quick {
    display: none;
  }

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

  .frame-rail {
    top: var(--bar-h);
    width: min(308px, 86vw);
    transform: translateX(-102%);
    visibility: hidden;
    box-shadow: 22px 0 60px -34px #000000;
    transition: transform var(--mid) var(--ease), visibility 0s linear var(--mid);
  }

  .frame-rail[data-open="true"] {
    transform: translateX(0);
    visibility: visible;
    transition: transform var(--mid) var(--ease), visibility 0s linear 0s;
  }

  .skip-link {
    left: 12px;
  }

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

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

  .foot-note {
    margin-left: 0;
  }
}

/* ---------- 小屏 ---------- */
@media (max-width: 620px) {
  .brand {
    padding-right: 10px;
    gap: 9px;
  }

  .brand-sub {
    display: none;
  }

  .btn--sm {
    padding: 0 14px;
    font-size: 12px;
  }

  .btn--sm.btn--primary {
    padding-right: 26px;
  }

  .btn--sm.btn--primary::after {
    right: 11px;
  }

  .nav-toggle {
    padding: 0 9px;
  }

  .nav-toggle-text {
    display: none;
  }

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

  .foot-base {
    font-size: 11px;
    gap: 8px 18px;
  }

  .fold-toggle {
    gap: 10px;
    font-size: 12px;
  }
}

/* ---------- 减少动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    transition-delay: 0s !important;
  }

  html.js [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .frame-progress span {
    transition: none;
  }
}