/* ============================================================
   澳客体育 / aoke-goal.com.cn
   共享样式表 /assets/site.css
   夜间赛场指挥中心 · 战术板框架语言
   ============================================================ */

:root {
  /* 色彩 */
  --ink: #071613;
  --panel: #0E2A24;
  --pine: #173F35;
  --orange: #FF6B1A;
  --orange-soft: #FFB37A;
  --mint: #3DE0AE;
  --slate: #8FA8B8;
  --mist: #C9D6DD;
  --paper: #F3F1E8;
  --grid: #263633;
  --brown: #5A2A12;

  /* 字体 */
  --font-display: "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC", sans-serif;
  --font-body: "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", ui-monospace, monospace;

  /* 字号 */
  --fs-hero: clamp(56px, 9vw, 148px);
  --fs-chapter: clamp(72px, 14vw, 220px);
  --fs-section: clamp(28px, 4vw, 56px);
  --fs-card: clamp(20px, 2.2vw, 28px);
  --fs-body: clamp(15px, 1.15vw, 18px);
  --fs-label: 12px;

  /* 度量 */
  --maxw: 1440px;
  --gutter: clamp(18px, 4vw, 56px);
  --header-h: 78px;
  --cut: 18px;
  --dur: 180ms;
  --ease: cubic-bezier(0.2, 0.6, 0.3, 1);
}

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

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

body {
  margin: 0;
  background-color: var(--ink);
  background-image:
    repeating-linear-gradient(0deg, rgba(143, 168, 184, 0.032) 0 1px, transparent 1px 4px),
    radial-gradient(120% 78% at 50% -12%, rgba(23, 63, 53, 0.62) 0%, rgba(23, 63, 53, 0) 62%);
  background-attachment: fixed;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-display);
  color: var(--paper);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

p { margin: 0 0 1em; }

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

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

button { font: inherit; color: inherit; }

a { color: var(--orange-soft); }

hr { border: 0; border-top: 1px solid var(--grid); margin: 0; }

::selection { background: var(--orange); color: #1B0A02; }

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

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -120px;
  z-index: 1000;
  padding: 11px 20px;
  background: var(--orange);
  color: #1B0A02;
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 14px; }

/* ---------- 容器与章节 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-inline: var(--gutter);
}
.container--narrow { max-width: 880px; }

.section { padding-block: clamp(48px, 7vw, 96px); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 14px 24px;
  margin-bottom: clamp(24px, 3vw, 44px);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--fs-section);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--paper);
  margin: 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--orange-soft);
}
.eyebrow::before {
  content: "";
  width: 20px;
  height: 1px;
  background: var(--orange);
  flex: 0 0 auto;
}

.chapter-coord {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate);
  font-variant-numeric: tabular-nums;
}

.rule-band {
  height: 3px;
  background: linear-gradient(90deg, var(--orange) 0 72px, var(--grid) 72px 100%);
  width: 100%;
}

/* ---------- 网格 ---------- */
.grid {
  display: grid;
  gap: clamp(16px, 2.2vw, 30px);
}
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4-8 { grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); }
.grid--5-7 { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
.grid--3-9 { grid-template-columns: minmax(0, 3fr) minmax(0, 9fr); }

/* ---------- 正文排版 ---------- */
.prose {
  max-width: 70ch;
  color: var(--mist);
}
.prose h2,
.prose h3 {
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 800;
  margin: 1.9em 0 0.6em;
}
.prose h2:first-child,
.prose h3:first-child { margin-top: 0; }
.prose p { margin: 0 0 1.1em; }
.prose ul,
.prose ol {
  margin: 0 0 1.2em;
  padding-left: 1.2em;
  list-style: none;
}
.prose ul li,
.prose ol li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 0.5em;
}
.prose ul li::before,
.prose ol li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 1px;
  background: var(--orange);
}
.prose a {
  color: var(--orange-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 179, 122, 0.42);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.prose a:hover {
  color: var(--orange);
  border-color: var(--orange);
}

/* ---------- 数字与标签 ---------- */
.data-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  font-feature-settings: "tnum" 1;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mint);
  background: rgba(61, 224, 174, 0.08);
  border: 1px solid rgba(61, 224, 174, 0.34);
}
.tag--warn {
  color: var(--orange-soft);
  background: rgba(255, 107, 26, 0.1);
  border-color: rgba(255, 179, 122, 0.36);
}

/* ---------- 面板 ---------- */
.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 30px);
  background: var(--panel);
  border: 1px solid var(--grid);
  color: var(--mist);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.panel--interactive {
  display: block;
  text-decoration: none;
  color: inherit;
}
.panel--interactive:hover,
.panel--interactive:focus-visible {
  border-color: var(--orange);
  background: var(--pine);
}

/* ---------- 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--pine);
  background-image:
    linear-gradient(152deg, rgba(23, 63, 53, 0.95), rgba(7, 22, 19, 0.98) 72%),
    repeating-linear-gradient(45deg, rgba(143, 168, 184, 0.05) 0 1px, transparent 1px 9px);
  border: 1px solid var(--grid);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.06) brightness(0.94);
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(7, 22, 19, 0) 44%, rgba(7, 22, 19, 0.72) 100%);
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--square { aspect-ratio: 1 / 1; }

/* ---------- 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--slate);
}
.breadcrumbs a {
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.breadcrumbs a:hover {
  color: var(--orange-soft);
  border-color: var(--orange-soft);
}
.breadcrumbs [aria-current="page"] { color: var(--mist); }
.crumb-sep { color: var(--grid); }

/* ---------- 按钮 ---------- */
.btn {
  position: relative;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.2;
  text-decoration: none;
  color: var(--mist);
  background: transparent;
  border: 0;
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--pine);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.btn-primary { color: #1B0A02; }
.btn-primary::before { background: var(--orange); }
.btn-primary:hover::before { background: var(--orange-soft); }
.btn-primary:hover { transform: translateX(2px); }

.btn-ghost { color: var(--mist); }
.btn-ghost::before {
  background: rgba(23, 63, 53, 0.55);
  box-shadow: inset 0 0 0 1px var(--grid);
}
.btn-ghost:hover { color: var(--paper); }
.btn-ghost:hover::before {
  background: rgba(255, 107, 26, 0.14);
  box-shadow: inset 0 0 0 1px var(--orange);
}

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

/* ============================================================
   头部
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: linear-gradient(180deg, rgba(14, 42, 36, 0.985) 0%, rgba(10, 32, 27, 0.965) 100%);
  border-top: 2px solid var(--orange);
  border-bottom: 1px solid var(--grid);
  box-shadow: 0 22px 34px -30px rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(6px);
}

.header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-inline: var(--gutter);
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 34px);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  text-decoration: none;
  color: var(--paper);
  flex: 0 0 auto;
}
.brand-mark {
  position: relative;
  display: block;
  width: 30px;
  height: 30px;
  flex: 0 0 auto;
  border: 1px solid var(--orange);
  background: rgba(255, 107, 26, 0.06);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
}
.brand-mark::before {
  content: "";
  position: absolute;
  top: 7px;
  right: 7px;
  width: 9px;
  height: 9px;
  background: var(--orange);
}
.brand-mark::after {
  content: "";
  position: absolute;
  left: 7px;
  bottom: 7px;
  width: 12px;
  height: 1px;
  background: var(--mint);
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.brand-name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--paper);
}
.brand-sub {
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--slate);
}
.brand--footer { padding: 0; }

.version-badge {
  align-self: center;
  flex: 0 0 auto;
  margin-left: -4px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  font-variant-numeric: tabular-nums;
  color: var(--mint);
  background: rgba(61, 224, 174, 0.08);
  border: 1px solid rgba(61, 224, 174, 0.42);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 6px 100%, 0 calc(100% - 6px));
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 9px 14px;
  background: rgba(23, 63, 53, 0.5);
  border: 1px solid var(--grid);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.nav-toggle:hover {
  color: var(--paper);
  border-color: var(--orange);
}
.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  width: 15px;
  height: 12px;
}
.nav-toggle-bars span {
  display: block;
  height: 1.5px;
  width: 100%;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1) {
  transform: translateY(4.5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3) {
  transform: translateY(-4.5px) rotate(-45deg);
}

/* 导航 */
.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 26px);
  margin-left: auto;
  flex: 1 1 auto;
  justify-content: flex-end;
}

.nav-list {
  display: flex;
  align-items: stretch;
  flex-wrap: nowrap;
}

.nav-item { position: relative; }

.nav-link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 7px;
  padding: 12px clamp(7px, 1.1vw, 13px);
  text-decoration: none;
  color: var(--mist);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: color var(--dur) var(--ease);
}
.nav-num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--slate);
  font-variant-numeric: tabular-nums;
  transition: color var(--dur) var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: clamp(7px, 1.1vw, 13px);
  right: clamp(7px, 1.1vw, 13px);
  bottom: 5px;
  height: 1px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}
.nav-link:hover { color: var(--paper); }
.nav-link:hover .nav-num { color: var(--orange-soft); }
.nav-link:hover::after { transform: scaleX(1); }

.nav-link[aria-current="page"] { color: var(--paper); }
.nav-link[aria-current="page"] .nav-num { color: var(--orange); }
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--orange);
  height: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: clamp(8px, 1.6vw, 20px);
  flex: 0 0 auto;
}
.nav-actions .btn { padding: 10px 18px; font-size: 13px; }

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: clamp(64px, 9vw, 140px);
  background: var(--panel);
  border-top: 2px solid var(--orange);
  color: var(--mist);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 140px;
  pointer-events: none;
  background: repeating-linear-gradient(90deg, transparent 0 38px, rgba(143, 168, 184, 0.055) 38px 39px);
}

.footer-inner {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(38px, 5vw, 72px) var(--gutter) 0;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: clamp(26px, 4vw, 68px);
  padding-bottom: clamp(26px, 3.4vw, 44px);
}

.footer-brandline {
  margin: 22px 0 10px;
  font-family: var(--font-display);
  font-size: clamp(16px, 1.7vw, 21px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
}
.footer-summary {
  margin: 0;
  max-width: 46ch;
  color: var(--slate);
  font-size: 15px;
  line-height: 1.75;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 40px);
  align-content: start;
}
.footer-col-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--orange-soft);
}
.footer-list li + li { margin-top: 6px; }

.footer-link {
  position: relative;
  display: inline-block;
  padding: 3px 0;
  color: var(--mist);
  font-size: 15px;
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}
.footer-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}
.footer-link:hover { color: var(--orange-soft); }
.footer-link:hover::after { transform: scaleX(1); }

.footer-contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(215px, 1fr));
  gap: clamp(18px, 3vw, 38px);
  padding-block: clamp(24px, 3.4vw, 42px);
  border-top: 1px solid var(--grid);
}
.contact-item--wide { grid-column: 1 / -1; }
.contact-label {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate);
}
.contact-value {
  margin: 0;
  color: var(--paper);
  font-size: 15px;
  line-height: 1.65;
  word-break: break-word;
}
.contact-value--num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  color: var(--orange-soft);
}
.contact-note {
  margin: 8px 0 0;
  max-width: 72ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 26px;
  padding: 22px 0 30px;
  border-top: 1px solid var(--grid);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
}
.footer-copy,
.footer-icp { margin: 0; }
.footer-icp { color: var(--slate); }

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}
.footer-legal-link {
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.footer-legal-link:hover {
  color: var(--orange-soft);
  border-color: var(--orange);
}

/* ============================================================
   脚本生成组件
   ============================================================ */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 200;
  pointer-events: none;
  background: linear-gradient(90deg, var(--orange) 0%, var(--mint) 100%);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 80ms linear;
}

.back-top {
  position: fixed;
  right: clamp(14px, 2.5vw, 30px);
  bottom: clamp(14px, 2.5vw, 30px);
  z-index: 130;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ink);
  background: var(--mint);
  border: 0;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease),
    visibility var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.back-top::before {
  content: "\2191";
  font-size: 13px;
  line-height: 1;
}
.back-top[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-top:hover { background: var(--orange); }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    margin-left: 0;
    padding: 10px var(--gutter) 26px;
    background: var(--panel);
    border-top: 1px solid var(--grid);
    border-bottom: 1px solid var(--grid);
    box-shadow: 0 30px 46px -28px rgba(0, 0, 0, 0.92);
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }
  .site-nav[data-open] { display: flex; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
  }
  .nav-item + .nav-item { border-top: 1px solid rgba(38, 54, 51, 0.72); }
  .nav-link {
    padding: 15px 2px;
    font-size: 16px;
    justify-content: flex-start;
    gap: 12px;
  }
  .nav-link::after { display: none; }
  .nav-link[aria-current="page"] {
    color: var(--orange);
    box-shadow: inset 3px 0 0 var(--orange);
    padding-left: 12px;
  }
  .nav-link[aria-current="page"] .nav-num { color: var(--orange); }

  .nav-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    margin: 20px 0 0;
  }
  .nav-actions .btn {
    width: 100%;
    padding: 13px 18px;
    font-size: 14px;
  }

  .footer-top { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .grid--2,
  .grid--3,
  .grid--4-8,
  .grid--5-7,
  .grid--3-9 { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 600px) {
  :root { --header-h: 68px; }
  .version-badge { display: none; }
  .brand-mark { width: 26px; height: 26px; }
  .brand-name { font-size: 17px; }
  .brand-sub { font-size: 9px; letter-spacing: 0.18em; }
  .footer-cols { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .back-top { padding: 9px 13px; }
}

/* ============================================================
   减少动效
   ============================================================ */
@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;
  }

  .nav-link::after,
  .footer-link::after { transition: none !important; }
  .btn-primary:hover { transform: none; }
  .back-top { transform: none; }
  .scroll-progress { transition: none; }
}