/* ==========================================================================
   乐竞官网 · 全站共享样式 /assets/site.css
   技术蓝图网格 · 粗野主义边框 · 墨绿近单色 + 红黄状态语义
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 变量
   -------------------------------------------------------------------------- */
:root {
  /* 墨绿基底 */
  --ink: #0B1F1A;
  --ink-2: #12312A;
  --ink-3: #0A0F0D;
  --line: #1E4A3D;

  /* 承托层 */
  --paper: #F1F5F2;
  --gray: #C3CEC9;
  --mid: #7E8C87;

  /* 状态色 */
  --red: #E23B24;
  --red-lit: #FF6A4D;
  --yellow: #F3C41B;
  --on-yellow: #14261F;
  --carbon: #0A0F0D;

  /* 尺度 */
  --wrap: 1240px;
  --gut: clamp(16px, 3.4vw, 40px);
  --shadow-hard: 6px 6px 0 var(--carbon);
  --shadow-soft: 4px 4px 0 var(--carbon);

  /* 字体 */
  --font-display: "Barlow Semi Condensed", "Archivo Narrow", "Source Han Sans SC",
    "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC",
    "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "IBM Plex Mono", SFMono-Regular,
    Menlo, Consolas, "Courier New", monospace;
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: 152px;
}

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd, hr { margin: 0; }

ul, ol { margin: 0; }
ul[class], ol[class] { list-style: none; padding: 0; }

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

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

a { color: inherit; }

table { border-collapse: collapse; width: 100%; }

hr { border: 0; }

/* --------------------------------------------------------------------------
   3. 中文排版与基础元素
   -------------------------------------------------------------------------- */
body {
  background-color: var(--ink);
  color: var(--gray);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--paper);
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(28px, 4.2vw, 64px); }
h2 { font-size: clamp(22px, 2.9vw, 38px); }
h3 { font-size: clamp(18px, 2vw, 24px); }
h4 { font-size: 17px; }

p { max-width: 42em; }

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

small { font-size: 12px; }

.num,
.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.label-mono {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mid);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--yellow);
  outline-offset: 3px;
}

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

/* 跳至主要内容 */
.skip-link {
  position: fixed;
  top: 0;
  left: 14px;
  z-index: 200;
  padding: 12px 20px;
  background: var(--yellow);
  color: var(--on-yellow);
  border: 2px solid var(--carbon);
  box-shadow: var(--shadow-soft);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  transform: translateY(-140%);
  transition: transform 0.15s ease-out;
}

.skip-link:focus,
.skip-link:focus-visible { transform: translateY(10px); }

.sr-only {
  position: absolute;
  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;
}

/* --------------------------------------------------------------------------
   4. 布局工具
   -------------------------------------------------------------------------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gut);
}

.wrap--narrow { max-width: 880px; }

.section { padding-block: clamp(48px, 7.5vw, 104px); }
.section--tight { padding-block: clamp(28px, 4vw, 52px); }
.section--alt { background-color: var(--ink-2); }
.section--paper { background-color: var(--paper); color: #2C3A35; }
.section--paper h1,
.section--paper h2,
.section--paper h3,
.section--paper h4 { color: var(--ink); }
.section--paper .label-mono { color: #5A6B65; }

.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 32px);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--text-figure { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
.grid--figure-text { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }

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

.rule--thick {
  height: 2px;
  background-color: var(--carbon);
}

.blueprint {
  background-image:
    linear-gradient(to right, rgba(30, 74, 61, 0.55) 0 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 74, 61, 0.55) 0 1px, transparent 1px);
  background-size: 64px 64px;
  background-position: 0 0;
}

.meta-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mid);
}

/* --------------------------------------------------------------------------
   5. 头部
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background-color: var(--ink);
  border-bottom: 2px solid var(--line);
}

.scroll-meter {
  display: block;
  height: 3px;
  background-color: var(--ink-3);
}

.scroll-meter-fill {
  display: block;
  height: 100%;
  width: 0;
  background-color: var(--yellow);
  transition: width 0.12s linear;
}

/* 顶栏元信息带 */
.header-rail {
  background-color: var(--ink-3);
  border-bottom: 1px solid var(--line);
}

.rail-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-block: 6px;
}

.rail-brand,
.rail-note {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.rail-brand { color: var(--gray); }
.rail-note { color: var(--mid); text-align: right; }

/* 品牌 + 栏目框架 */
.header-frame {
  position: relative;
  background-color: var(--ink);
  border-bottom: 1px solid var(--line);
}

.frame-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-block: 9px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--paper);
  flex: 0 0 auto;
}

.brand-sigil {
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border: 2px solid var(--yellow);
  background-color: var(--ink-2);
  color: var(--yellow);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.02em;
  box-shadow: 3px 3px 0 var(--carbon);
  transition: background-color 0.15s ease-out, color 0.15s ease-out;
}

.brand:hover .brand-sigil,
.brand:focus-visible .brand-sigil {
  background-color: var(--yellow);
  color: var(--on-yellow);
}

.brand-text { display: block; min-width: 0; }

.brand-name {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.15;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.brand-sub {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mid);
}

/* 导航 */
.site-nav { display: flex; }

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list a {
  display: block;
  padding: 10px 13px;
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--gray);
  text-decoration: none;
  border: 1px solid transparent;
  transition: color 0.15s ease-out, background-color 0.15s ease-out,
    border-color 0.15s ease-out;
}

.nav-list a:hover {
  color: var(--paper);
  background-color: var(--ink-2);
  border-color: var(--line);
}

.nav-list a[aria-current="page"] {
  color: var(--on-yellow);
  background-color: var(--yellow);
  border-color: var(--carbon);
  box-shadow: 3px 3px 0 var(--carbon);
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  border: 2px solid var(--line);
  background-color: var(--ink-2);
  color: var(--gray);
  cursor: pointer;
  transition: border-color 0.15s ease-out, color 0.15s ease-out,
    background-color 0.15s ease-out;
}

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

.nav-toggle-box {
  display: grid;
  gap: 4px;
  width: 16px;
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  background-color: currentColor;
  transition: transform 0.15s ease-out, opacity 0.15s ease-out;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(6px) 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(-6px) rotate(-45deg);
}

.nav-toggle-text {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
}

/* 轮次滑轨带 */
.header-belt {
  background-color: var(--ink-2);
  border-top: 1px solid var(--line);
  border-bottom: 2px solid var(--carbon);
}

.belt-inner {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 8px var(--gut);
  display: flex;
  align-items: center;
  gap: 14px;
  overflow-x: auto;
  scrollbar-width: none;
}

.belt-inner::-webkit-scrollbar { display: none; }

.belt-label,
.belt-count {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
  flex: 0 0 auto;
}

.belt-label { color: var(--mid); }
.belt-count { color: var(--yellow); }

.belt-track {
  flex: 1 1 auto;
  min-width: 110px;
  height: 10px;
  background-image: repeating-linear-gradient(
    to right,
    var(--line) 0 1px,
    transparent 1px 13px
  );
  border-bottom: 1px solid var(--mid);
}

/* --------------------------------------------------------------------------
   6. 页脚
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--ink-3);
  border-top: 2px solid var(--line);
  color: var(--gray);
  padding-top: clamp(40px, 5vw, 64px);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(22px, 3vw, 40px);
  padding-bottom: clamp(32px, 4vw, 52px);
}

.footer-col { min-width: 0; }

.footer-brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.01em;
  color: var(--paper);
  max-width: none;
}

.footer-domain {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--yellow);
  word-break: break-all;
  max-width: none;
}

.footer-tagline {
  margin-top: 12px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--mid);
  max-width: 26em;
}

.footer-title {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mid);
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.footer-list {
  display: grid;
  gap: 9px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-list a {
  display: inline-block;
  font-size: 14.5px;
  color: var(--gray);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease-out, border-color 0.15s ease-out;
}

.footer-list a:hover,
.footer-list a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--red-lit);
}

.footer-contact {
  display: grid;
  gap: 12px;
  margin: 0;
}

.footer-contact-row { display: grid; gap: 2px; }

.footer-contact dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mid);
}

.footer-contact dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  color: var(--gray);
  word-break: break-word;
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 26px;
  padding-block: 18px 22px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--mid);
}

.footer-base-list {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-base-list a {
  color: var(--gray);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color 0.15s ease-out, border-color 0.15s ease-out;
}

.footer-base-list a:hover,
.footer-base-list a:focus-visible {
  color: var(--yellow);
  border-bottom-color: var(--yellow);
}

.footer-legal { margin: 0; max-width: none; }

/* --------------------------------------------------------------------------
   7. 按钮与标签
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  padding: 12px 20px;
  background-color: var(--paper);
  color: var(--ink);
  border: 2px solid var(--carbon);
  box-shadow: var(--shadow-soft);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.15s ease-out, box-shadow 0.15s ease-out,
    background-color 0.15s ease-out, color 0.15s ease-out,
    border-color 0.15s ease-out;
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--carbon);
}

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--carbon);
}

.btn--ghost {
  background-color: transparent;
  color: var(--paper);
  border-color: var(--line);
}

.btn--ghost:hover {
  border-color: var(--yellow);
  color: var(--yellow);
}

.btn--red {
  background-color: var(--ink-2);
  color: var(--red-lit);
  border-color: var(--red);
}

.btn--red:hover {
  background-color: var(--red-lit);
  color: var(--carbon);
  border-color: var(--carbon);
}

.btn--outline-yellow {
  background-color: transparent;
  color: var(--yellow);
  border-color: var(--yellow);
}

.btn--outline-yellow:hover {
  background-color: var(--yellow);
  color: var(--on-yellow);
  border-color: var(--carbon);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 3px 9px;
  border: 1px solid var(--line);
  background-color: transparent;
  color: var(--gray);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
}

.tag--red {
  border-color: var(--red);
  color: var(--red-lit);
}

.tag--yellow {
  border-color: var(--yellow);
  color: var(--yellow);
}

.tag--yellow-solid {
  background-color: var(--yellow);
  color: var(--on-yellow);
  border-color: var(--carbon);
}

/* --------------------------------------------------------------------------
   8. 面板 / 图片容器 / 数据基础
   -------------------------------------------------------------------------- */
.panel {
  background-color: var(--ink-2);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
  padding: clamp(18px, 2.4vw, 28px);
}

.panel--flush { padding: 0; }

.panel--paper {
  background-color: var(--paper);
  color: #2C3A35;
  border-color: var(--carbon);
}

.panel--paper h2,
.panel--paper h3,
.panel--paper h4 { color: var(--ink); }

.figure {
  position: relative;
  margin: 0;
  background-color: var(--ink-2);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.figure > img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background-color: var(--ink-2);
}

.figure--16x9 > img { aspect-ratio: 16 / 9; }
.figure--16x7 > img { aspect-ratio: 16 / 7; }
.figure--4x3 > img { aspect-ratio: 4 / 3; }
.figure--1x1 > img { aspect-ratio: 1 / 1; }
.figure--3x4 > img { aspect-ratio: 3 / 4; }

.figure figcaption {
  padding: 10px 12px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  letter-spacing: 0.06em;
  color: var(--mid);
}

.img-slot {
  display: grid;
  place-items: center;
  min-height: 160px;
  padding: 20px;
  border: 1px dashed var(--line);
  background-color: var(--ink-2);
  color: var(--mid);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-align: center;
}

/* 表格基础（页面阶段可继续扩展列宽与粘性首列） */
.data-table {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13.5px;
}

.data-table th,
.data-table td {
  padding: 11px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.data-table thead th {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mid);
  border-bottom: 2px solid var(--carbon);
}

.data-table tbody tr {
  transition: background-color 0.15s ease-out;
}

.data-table tbody tr:nth-child(even) {
  background-color: rgba(241, 245, 242, 0.03);
}

.data-table tbody tr:hover {
  background-color: rgba(241, 245, 242, 0.08);
}

/* --------------------------------------------------------------------------
   9. 面包屑 / 返回顶部
   -------------------------------------------------------------------------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mid);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

.breadcrumb a {
  color: var(--gray);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color 0.15s ease-out, border-color 0.15s ease-out;
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--yellow);
}

.to-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 90;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  background-color: var(--ink-2);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-soft);
  color: var(--gray);
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.15s ease-out, transform 0.15s ease-out,
    visibility 0.15s ease-out, border-color 0.15s ease-out,
    color 0.15s ease-out;
}

.to-top.is-on {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.to-top:hover,
.to-top:focus-visible {
  border-color: var(--yellow);
  color: var(--yellow);
}

/* --------------------------------------------------------------------------
   10. 响应式
   -------------------------------------------------------------------------- */
@media (max-width: 1080px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 980px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--text-figure,
  .grid--figure-text { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 112px; }

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

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 20;
    display: none;
    max-height: 70vh;
    overflow-y: auto;
    padding: 6px var(--gut) 14px;
    background-color: var(--ink-2);
    border-top: 1px solid var(--line);
    border-bottom: 2px solid var(--carbon);
    box-shadow: 0 10px 0 rgba(10, 15, 13, 0.55);
  }

  .site-header[data-open] .site-nav { display: block; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-list a {
    padding: 14px 6px;
    font-size: 16px;
    border: 0;
    border-bottom: 1px solid var(--line);
  }

  .nav-list a:hover {
    background-color: transparent;
    border-color: var(--line);
    color: var(--paper);
  }

  .nav-list a[aria-current="page"] {
    background-color: var(--yellow);
    color: var(--on-yellow);
    border-bottom-color: var(--carbon);
    border-left: 4px solid var(--carbon);
    box-shadow: none;
    padding-left: 10px;
  }

  .frame-inner { gap: 14px; }
  .brand-name { font-size: 17.5px; }
  .brand-sigil { width: 36px; height: 36px; font-size: 13.5px; }
}

@media (max-width: 720px) {
  .header-rail { display: none; }
  .rail-inner { padding-block: 5px; }
  .belt-inner { padding-block: 7px; }
  .btn { width: 100%; justify-content: center; }
  .to-top { right: 12px; bottom: 12px; }
}

@media (max-width: 640px) {
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: minmax(0, 1fr); }

  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: 26px; }
  .footer-base { flex-direction: column; align-items: flex-start; }
  .panel { box-shadow: 4px 4px 0 var(--carbon); }
  .figure { box-shadow: 4px 4px 0 var(--carbon); }
}

@media (max-width: 420px) {
  .brand-sub { display: none; }
  .nav-toggle-text { display: none; }
}

/* --------------------------------------------------------------------------
   11. 动效偏好
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-property: color, background-color, border-color, opacity,
      visibility !important;
    transition-duration: 0.12s !important;
  }

  .btn:hover,
  .btn:active {
    transform: none !important;
    box-shadow: var(--shadow-soft) !important;
  }

  .to-top { transform: none !important; }
  .skip-link { transform: translateY(-140%) !important; }
  .skip-link:focus,
  .skip-link:focus-visible { transform: translateY(10px) !important; }
  .scroll-meter-fill { transition: none !important; }
  .nav-toggle-bar { transition: none !important; }
}