/* ==========================================================================
   亿万中心 · 共享样式 /assets/site.css
   深空蓝底 + 电子青通道光 + 琥珀行动点
   ========================================================================== */

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

:root {
  /* 色彩 */
  --ink: #07122B;
  --ink-2: #0E1D3D;
  --glass: #162A52;
  --cyan: #22D3EE;
  --cyan-soft: #8CF8F2;
  --amber: #FFB020;
  --amber-deep: #D98200;
  --white: #F4F8FF;
  --mist: #A9B9D9;
  --line: #2B4270;
  --green: #3DDC97;

  /* 字体 */
  --font-head: 'Space Grotesk', 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-body: 'Inter', 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Roboto Mono', ui-monospace, 'Courier New', monospace;

  /* 尺度 */
  --shell: 1200px;
  --gutter: clamp(18px, 4vw, 40px);
  --r-lg: 28px;
  --r-md: 18px;
  --r-sm: 12px;
  --ease: cubic-bezier(.22, .8, .3, 1);
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

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

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    radial-gradient(85vw 60vw at 88% -12%, rgba(34, 211, 238, .10), transparent 62%),
    radial-gradient(60vw 55vw at -10% 18%, rgba(255, 176, 32, .055), transparent 62%);
  background-repeat: no-repeat;
  color: var(--white);
  font-family: var(--font-body);
  font-size: clamp(15.5px, 1.03vw, 17px);
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: .012em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 中文排版 */
h1, h2, h3, h4, h5 {
  margin: 0 0 .5em;
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--white);
  text-wrap: balance;
}

h1 { font-size: clamp(32px, 5.2vw, 60px); }
h2 { font-size: clamp(26px, 3.6vw, 40px); }
h3 { font-size: clamp(20px, 2.2vw, 27px); }
h4 { font-size: clamp(17px, 1.5vw, 20px); letter-spacing: -.01em; }

p {
  margin: 0 0 1em;
  text-wrap: pretty;
}

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

a { color: var(--cyan-soft); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--white); }

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

img, svg, video, canvas, picture { max-width: 100%; }
img, video { height: auto; }

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

::selection { background: rgba(34, 211, 238, .32); color: var(--white); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 8px;
}

/* --------------------------------------------------------------------------
   容器与跳转
   -------------------------------------------------------------------------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 50%;
  z-index: 400;
  display: inline-block;
  padding: .7em 1.5em;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--amber), var(--amber-deep));
  color: #1A1204;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  transform: translate(-50%, -170%);
  transition: transform .18s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible {
  transform: translate(-50%, 0);
  color: #1A1204;
}

/* --------------------------------------------------------------------------
   头部 · 双层信息导航
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: linear-gradient(180deg, rgba(7, 18, 43, .97), rgba(7, 18, 43, .84));
  border-bottom: 1px solid rgba(43, 66, 112, .75);
  color: var(--white);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  backdrop-filter: blur(18px) saturate(150%);
}

.header-top__inner {
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 26px);
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  min-height: 68px;
  padding-inline: var(--gutter);
  transition: min-height .2s var(--ease);
}

.site-header[data-scrolled="true"] .header-top__inner { min-height: 54px; }

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  color: inherit;
  text-decoration: none;
}
.brand:hover { color: inherit; }

.brand__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 13px;
  background: linear-gradient(140deg, var(--cyan), var(--cyan-soft) 52%, #2C7BFF);
  color: #04121f;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 19px;
  line-height: 1;
  box-shadow: 0 10px 24px -12px rgba(34, 211, 238, .95);
  transition: transform .18s var(--ease);
}
.brand:hover .brand__mark { transform: translateY(-2px) rotate(-4deg); }

.brand__text { display: flex; flex-direction: column; line-height: 1.15; }

.brand__name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -.01em;
  color: var(--white);
}

.brand__tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
}

/* 状态说明 */
.header-note {
  display: none;
  align-items: center;
  gap: 9px;
  margin: 0;
  font-size: 12.5px;
  letter-spacing: .03em;
  color: var(--mist);
  white-space: nowrap;
}

.header-note__pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(61, 220, 151, .16);
  animation: pulse-dot 2.8s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .45; transform: scale(.82); }
}

/* 上层行动区 */
.header-top__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

.version-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 1px;
  padding: .3em .72em;
  border-radius: 999px;
  border: 1px solid rgba(34, 211, 238, .40);
  background: rgba(34, 211, 238, .08);
  color: var(--cyan-soft);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .02em;
  line-height: 1.4;
}
.version-chip__key { font-size: .82em; color: var(--cyan); }

.quick-link {
  display: inline-flex;
  align-items: center;
  padding: .62em 1.15em;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--amber), var(--amber-deep));
  color: #191003;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 13.5px;
  letter-spacing: .01em;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 0 12px 26px -16px rgba(255, 176, 32, .95);
  transition: transform .16s var(--ease), box-shadow .16s var(--ease);
}
.quick-link:hover {
  color: #191003;
  transform: translateY(-2px);
  box-shadow: 0 16px 30px -16px rgba(255, 176, 32, 1);
}

/* 抽屉按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: .55em .9em;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(14, 29, 61, .92);
  color: var(--white);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  transition: border-color .16s var(--ease), background .16s var(--ease);
}
.nav-toggle:hover { border-color: rgba(34, 211, 238, .6); }

.nav-toggle__bars { display: grid; gap: 4px; width: 16px; }
.nav-toggle__bars span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan-soft);
  transition: transform .18s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child { transform: translateY(3px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child { transform: translateY(-3px) rotate(-45deg); }

.nav-toggle__label { letter-spacing: .04em; }

/* 下层导航带 */
.header-main {
  background: linear-gradient(90deg, rgba(14, 29, 61, .88), rgba(7, 18, 43, .35) 55%, rgba(14, 29, 61, .88));
  border-top: 1px solid rgba(43, 66, 112, .48);
}

.header-main__inner {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(8px, 1.4vw, 18px);
  padding-block: 8px;
}

.site-nav__group { display: flex; align-items: center; gap: 2px; }

.site-nav__title { display: none; }

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

.site-nav__list a {
  display: inline-flex;
  align-items: center;
  padding: .5em 1.05em;
  border-radius: 999px;
  border: 1px solid transparent;
  color: var(--mist);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 14.5px;
  letter-spacing: .005em;
  text-decoration: none;
  transition: color .15s var(--ease), background .15s var(--ease),
              border-color .15s var(--ease), transform .15s var(--ease);
}
.site-nav__list a:hover {
  color: var(--white);
  background: rgba(34, 211, 238, .10);
  border-color: rgba(34, 211, 238, .35);
  transform: translateY(-1px);
}
.site-nav__list a[aria-current="page"] {
  color: #04121f;
  background: linear-gradient(135deg, var(--cyan), var(--cyan-soft));
  border-color: transparent;
  box-shadow: 0 10px 22px -14px rgba(34, 211, 238, .95);
}

@media (min-width: 901px) {
  .site-nav__group + .site-nav__group {
    position: relative;
    margin-left: 10px;
    padding-left: 14px;
  }
  .site-nav__group + .site-nav__group::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 1px;
    height: 18px;
    transform: translateY(-50%);
    background: rgba(43, 66, 112, .9);
  }
}

@media (min-width: 1100px) {
  .header-note { display: inline-flex; }
}

/* 阅读进度光条 */
.header-rail {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: block;
  height: 2px;
  background: rgba(43, 66, 112, .45);
  overflow: hidden;
}
.header-rail__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--cyan-soft) 62%, var(--amber));
  transition: width .12s linear;
}

/* --------------------------------------------------------------------------
   通用按钮 / 标签 / 数据
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55em;
  padding: .95em 1.6em;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: var(--white);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  line-height: 1;
  letter-spacing: .01em;
  text-decoration: none;
  cursor: pointer;
  transition: transform .16s var(--ease), background .16s var(--ease),
              border-color .16s var(--ease), color .16s var(--ease), box-shadow .16s var(--ease);
}
.btn:hover { color: var(--white); }

.btn--primary {
  background: linear-gradient(135deg, var(--amber), var(--amber-deep));
  color: #1A1204;
  box-shadow: 0 14px 30px -18px rgba(255, 176, 32, .95);
}
.btn--primary:hover {
  color: #1A1204;
  transform: translateY(-2px);
  box-shadow: 0 18px 34px -18px rgba(255, 176, 32, 1);
}

.btn--ghost {
  border-color: var(--line);
  background: rgba(22, 42, 82, .55);
  color: var(--white);
}
.btn--ghost:hover {
  border-color: rgba(34, 211, 238, .65);
  color: var(--cyan-soft);
  transform: translateY(-2px);
}

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

.chip {
  display: inline-flex;
  align-items: center;
  gap: .45em;
  padding: .35em .9em;
  border-radius: 999px;
  border: 1px solid rgba(34, 211, 238, .32);
  background: rgba(34, 211, 238, .08);
  color: var(--cyan-soft);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .05em;
  line-height: 1.6;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
}

.data-figure { display: flex; flex-direction: column; gap: 4px; }

.data-figure__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan-soft);
}

.data-figure__cap {
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--mist);
}

/* --------------------------------------------------------------------------
   章节 / Bento / 图片容器 / 正文
   -------------------------------------------------------------------------- */
.section { padding-block: clamp(44px, 6vw, 88px); }

.section--narrow {
  max-width: 880px;
  margin-inline: auto;
}

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 10px 28px;
  margin-bottom: clamp(20px, 3vw, 36px);
}

.section__title { margin: 0; }

.section__sub {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  color: var(--mist);
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(14px, 1.6vw, 22px);
}

.bento-card {
  position: relative;
  grid-column: span 12;
  padding: clamp(20px, 2.4vw, 32px);
  border-radius: var(--r-lg);
  border: 1px solid rgba(43, 66, 112, .85);
  background: linear-gradient(160deg, rgba(22, 42, 82, .92), rgba(14, 29, 61, .78));
  box-shadow: 0 24px 48px -36px rgba(0, 0, 0, .95);
  transition: transform .18s var(--ease), border-color .18s var(--ease), box-shadow .18s var(--ease);
}
.bento-card:hover {
  transform: translateY(-3px);
  border-color: rgba(34, 211, 238, .55);
  box-shadow: 0 28px 56px -30px rgba(34, 211, 238, .35);
}

.bento-card__label {
  display: block;
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.bento-card__title { margin: 0 0 .5em; font-size: clamp(18px, 1.8vw, 22px); }

@media (min-width: 700px) {
  .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-12 { grid-column: span 12; }
}

.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid rgba(43, 66, 112, .9);
  background:
    radial-gradient(120% 100% at 8% 0%, rgba(34, 211, 238, .22), transparent 62%),
    linear-gradient(150deg, var(--glass), var(--ink-2) 68%, var(--ink));
  isolation: isolate;
}

.media-frame > img,
.media-frame > video,
.media-frame > canvas,
.media-frame > picture,
.media-frame > picture > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--auto { aspect-ratio: auto; }

.media-frame__caption {
  position: absolute;
  left: 16px;
  bottom: 14px;
  z-index: 2;
  margin: 0;
  padding: .3em .85em;
  border-radius: 999px;
  background: rgba(7, 18, 43, .78);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
}

.prose {
  max-width: 70ch;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--mist);
}
.prose h2,
.prose h3 { margin: 1.7em 0 .55em; color: var(--white); }
.prose h2:first-child,
.prose h3:first-child { margin-top: 0; }
.prose p { margin: 0 0 1.05em; }
.prose ul,
.prose ol { margin: 0 0 1.1em; padding-left: 1.25em; }
.prose li { margin-bottom: .45em; }
.prose strong { color: var(--white); }
.prose a { color: var(--cyan-soft); }
.prose > :last-child { margin-bottom: 0; }

.breadcrumbs { padding-block: 16px 0; }

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
}
.breadcrumbs__list li { display: inline-flex; align-items: center; }
.breadcrumbs__list li + li::before {
  content: "/";
  margin: 0 9px;
  color: var(--line);
}
.breadcrumbs__list a { color: var(--mist); text-decoration: none; }
.breadcrumbs__list a:hover { color: var(--cyan-soft); }
.breadcrumbs__list [aria-current="page"] { color: var(--white); }

/* --------------------------------------------------------------------------
   页脚
   -------------------------------------------------------------------------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  border-top: 1px solid rgba(43, 66, 112, .9);
  background: linear-gradient(180deg, var(--ink-2) 0%, var(--ink) 78%);
  color: var(--mist);
  overflow: hidden;
}

.footer-glow {
  position: absolute;
  inset: -180px -12% auto -12%;
  display: block;
  height: 340px;
  background: radial-gradient(50% 100% at 50% 100%, rgba(34, 211, 238, .22), transparent 72%);
  pointer-events: none;
}

.footer-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3.4vw, 48px);
  padding-block: clamp(40px, 6vw, 72px) clamp(28px, 4vw, 46px);
}

.footer-brand { display: block; }

.footer-brand__line {
  margin: 16px 0 18px;
  max-width: 30ch;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--mist);
}

.footer-badge {
  display: inline-flex;
  align-items: center;
  padding: .34em .9em;
  border-radius: 999px;
  border: 1px solid rgba(61, 220, 151, .38);
  background: rgba(61, 220, 151, .10);
  color: var(--green);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 22px 18px;
}

.footer-col__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.footer-col__list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.footer-col__list li + li { margin-top: 9px; }

.footer-col__list a {
  display: inline-flex;
  align-items: center;
  gap: 0;
  color: var(--mist);
  font-size: 14.5px;
  text-decoration: none;
  transition: color .15s var(--ease);
}
.footer-col__list a::before {
  content: "";
  display: block;
  width: 0;
  height: 1px;
  margin-right: 0;
  background: var(--cyan);
  transition: width .18s var(--ease), margin-right .18s var(--ease);
}
.footer-col__list a:hover { color: var(--cyan-soft); }
.footer-col__list a:hover::before { width: 12px; margin-right: 7px; }

.footer-contact__list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.footer-contact__list li {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 10px;
  padding: 7px 0;
  border-bottom: 1px dashed rgba(43, 66, 112, .65);
  font-size: 14px;
  line-height: 1.6;
  color: var(--white);
  word-break: break-word;
}
.footer-contact__list li:last-child { border-bottom: 0; }

.footer-contact__key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--mist);
  padding-top: 3px;
}

.footer-contact__note {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: rgba(169, 185, 217, .82);
}

.footer-base {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(43, 66, 112, .7);
  background: rgba(7, 18, 43, .72);
}

.footer-base__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 26px;
  padding-block: 18px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: rgba(169, 185, 217, .9);
}

.footer-base__item { margin: 0; }
.footer-base__item--accent { color: var(--amber); }

/* --------------------------------------------------------------------------
   响应式
   -------------------------------------------------------------------------- */
@media (min-width: 760px) {
  .footer-shell { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
}

@media (min-width: 1024px) {
  .footer-shell { grid-template-columns: 1.15fr 1.55fr .95fr; }
  .footer-brand { grid-column: auto; }
}

@media (max-width: 900px) {
  .site-header { position: sticky; }

  .nav-toggle { display: inline-flex; }
  .quick-link { display: none; }
  .header-note { display: none; }

  .header-top__actions { margin-left: auto; }

  .header-main {
    background: transparent;
    border-top: 0;
  }

  .header-main__inner { padding-inline: 0; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: block;
    max-height: 0;
    padding: 6px var(--gutter) 22px;
    overflow: hidden;
    visibility: hidden;
    opacity: 0;
    background: linear-gradient(180deg, var(--ink-2), var(--ink) 72%);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 34px 52px -34px rgba(0, 0, 0, .95);
    transition: max-height .3s var(--ease), opacity .2s var(--ease), visibility .3s var(--ease);
  }

  .site-nav[data-open="true"] {
    max-height: min(76vh, 620px);
    overflow-y: auto;
    visibility: visible;
    opacity: 1;
  }

  .site-nav__group { display: block; }

  .site-nav__group + .site-nav__group {
    margin-top: 10px;
    padding-top: 8px;
    border-top: 1px solid rgba(43, 66, 112, .62);
  }

  .site-nav__title {
    display: block;
    margin: 14px 0 6px;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: var(--cyan);
  }

  .site-nav__list { display: block; }
  .site-nav__list li + li { margin-top: 2px; }

  .site-nav__list a {
    display: flex;
    width: 100%;
    padding: .8em 1em;
    border-radius: 14px;
    font-size: 16px;
  }
  .site-nav__list a:hover { transform: none; }
}

@media (max-width: 520px) {
  .header-top__inner { min-height: 58px; gap: 10px; }

  .brand__mark { width: 32px; height: 32px; border-radius: 11px; font-size: 16px; }
  .brand__name { font-size: 15px; }
  .brand__tag { font-size: 9px; letter-spacing: .13em; }

  .version-chip { font-size: 11.5px; padding: .28em .6em; }

  .footer-contact__list li { grid-template-columns: 68px minmax(0, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .header-note__pulse { animation: none; }
  .bento-card:hover,
  .quick-link:hover,
  .btn:hover,
  .site-nav__list a:hover { transform: none; }
}