/* ==========================================================================
   欧宝娱乐体育 · /assets/site.css
   共享外壳：侧轨导航 / 移动抽屉 / 版权页式页脚 / 画册式基础组件
   ========================================================================== */

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

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

body,
h1, h2, h3, h4, h5, p,
ul, ol, figure, blockquote { margin: 0; }

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

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

a { color: inherit; }

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

[id] { scroll-margin-top: 76px; }

/* ---------- tokens ---------- */
:root {
  --ink: #08111F;
  --panel: #121820;
  --layer: #13243A;
  --paper: #F2F5F7;
  --muted: #A8B6C4;
  --cyan: #21F0D0;
  --orange: #FF6B1A;
  --magenta-a: #E23BFF;
  --magenta-b: #FF3D7F;
  --line: #2B3C50;
  --ok: #5BE38A;

  --rail: 88px;
  --gutter: clamp(18px, 4vw, 64px);
  --ease: cubic-bezier(.2, .7, .2, 1);

  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;
}

/* ---------- base ---------- */
body {
  min-height: 100vh;
  background:
    radial-gradient(120% 90% at 100% -10%, #0E1E33 0%, #08111F 48%, #060D17 100%),
    var(--ink);
  background-attachment: fixed;
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--cyan); color: #06131A; }

.mono {
  font-family: var(--font-mono);
  letter-spacing: .04em;
  font-variant-numeric: tabular-nums;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.is-hidden { display: none !important; }

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 10px 16px;
  border-radius: 2px;
  background: var(--cyan);
  color: #06131A;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform .18s var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* ---------- header / 移动端顶部条 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 70;
  background: rgba(8, 17, 31, .94);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan) 0%, rgba(33, 240, 208, 0) 42%, rgba(255, 107, 26, 0) 68%, var(--orange) 100%);
  opacity: .65;
  pointer-events: none;
}

.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  max-width: 1400px;
  margin-inline: auto;
  min-height: 58px;
  padding: 10px var(--gutter);
}

/* ---------- brand ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--paper);
  text-decoration: none;
  transition: opacity .2s var(--ease);
}
.brand:hover { opacity: .86; }

.brand__glyph {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: linear-gradient(135deg, rgba(33, 240, 208, .18) 0%, rgba(255, 61, 127, .12) 100%);
  color: var(--cyan);
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 17px;
  line-height: 1;
  transform: skewX(-6deg);
}

.brand__type {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand__name {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: 16px;
  line-height: 1.2;
  letter-spacing: .02em;
}

.brand__sub {
  font-family: var(--font-mono);
  font-size: 9.5px;
  line-height: 1.6;
  letter-spacing: .16em;
  color: var(--muted);
}

/* 页脚品牌保持横排 */
.brand--footer { flex-direction: row; }
.brand--footer .brand__type { align-items: flex-start; }
.brand--footer .brand__name {
  writing-mode: horizontal-tb;
  font-size: 17px;
  letter-spacing: .02em;
}
.brand--footer .brand__sub { display: block; }

/* ---------- 移动菜单按钮（右下拇指区） ---------- */
.nav-toggle {
  position: fixed;
  right: 16px;
  bottom: calc(18px + env(safe-area-inset-bottom, 0px));
  z-index: 90;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-radius: 3px;
  background: var(--cyan);
  color: #06131A;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  cursor: pointer;
  box-shadow: 0 10px 28px rgba(0, 0, 0, .55), 0 0 0 1px rgba(6, 19, 26, .35);
  transition: background .2s var(--ease), transform .2s var(--ease);
}
.nav-toggle:hover { background: #4FF6DC; }
.nav-toggle:active { transform: translateY(1px); }

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 16px;
  height: 12px;
}
.nav-toggle__bars i {
  display: block;
  height: 2px;
  border-radius: 1px;
  background: currentColor;
  transition: transform .22s var(--ease), width .22s var(--ease);
}
.nav-toggle__bars i:nth-child(2) { width: 11px; }

.site-header[data-open] .nav-toggle__bars i:first-child { transform: translateY(3px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars i:nth-child(2) {
  width: 16px;
  transform: translateY(-3px) rotate(-45deg);
}

/* ---------- 移动端抽屉导航 ---------- */
.site-nav {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: flex;
  flex-direction: column;
  padding: clamp(64px, 15vw, 92px) var(--gutter) calc(92px + env(safe-area-inset-bottom, 0px));
  background: radial-gradient(140% 90% at 100% 0%, #12263F 0%, #0A1626 45%, #060E19 100%);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity .24s var(--ease), transform .3s var(--ease), visibility .24s linear;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.site-header[data-open] .site-nav {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

html.nav-open { overflow: hidden; }

.site-nav__eyebrow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--muted);
}
.site-nav__count { color: var(--cyan); }

.site-nav__list {
  display: flex;
  flex-direction: column;
  margin-top: 8px;
}

.site-nav__item { display: block; }

.nav-link {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 2px;
  border-bottom: 1px solid rgba(43, 60, 80, .55);
  color: var(--paper);
  text-decoration: none;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(20px, 5.6vw, 28px);
  line-height: 1.3;
  letter-spacing: .02em;
  transition: color .18s var(--ease), background .18s var(--ease), transform .18s var(--ease);
}

.nav-link__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--muted);
}

.nav-link__label { flex: 1 1 auto; }

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

.nav-link[aria-current="page"] { color: var(--cyan); }
.nav-link[aria-current="page"] .nav-link__num { color: var(--cyan); }
.nav-link[aria-current="page"]::after {
  content: "";
  flex: 0 0 auto;
  align-self: center;
  width: 26px;
  height: 2px;
  background: var(--cyan);
}

.site-nav__foot {
  display: grid;
  gap: 10px;
  margin-top: auto;
  padding-top: 28px;
}

.rail-action { width: 100%; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border: 1px solid transparent;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: .1em;
  text-decoration: none;
  text-align: center;
  cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}

.btn--cyan {
  background: var(--cyan);
  color: #06131A;
}
.btn--cyan:hover { background: #4FF6DC; }

.btn--orange {
  background: var(--orange);
  color: #0B1219;
}
.btn--orange:hover { background: #FF8340; }

.btn--ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--paper);
  font-weight: 500;
}
.btn--ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.btn--line {
  background: transparent;
  border-color: var(--orange);
  color: var(--orange);
}
.btn--line:hover {
  background: var(--orange);
  color: #0B1219;
}

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

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 9vw, 120px);
  padding: clamp(38px, 6vw, 72px) 0 calc(28px + env(safe-area-inset-bottom, 0px));
  background: linear-gradient(180deg, #0B131C 0%, #0C1219 100%);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: min(340px, 62%);
  height: 2px;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--magenta-a) 52%, var(--orange) 100%);
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 48px);
}

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

.footer-brandline {
  max-width: 22ch;
  margin-top: 16px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(16px, 2.1vw, 19px);
  line-height: 1.65;
  color: var(--paper);
}

.footer-note {
  max-width: 26ch;
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--muted);
}

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

.footer-col__title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--paper);
}

.footer-col__num {
  font-size: 10px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer-list a {
  display: inline-block;
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
  transition: color .18s var(--ease), transform .18s var(--ease);
}
.footer-list a:hover,
.footer-list a:focus-visible {
  color: var(--cyan);
  transform: translateX(3px);
}
.footer-list a[aria-current="page"] { color: var(--cyan); }

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-contact li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}

.footer-contact__k {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--muted);
}

.footer-contact__v {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 20px;
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--muted);
}

.footer-copy,
.footer-icp { color: var(--muted); }

.footer-tag {
  color: var(--cyan);
  letter-spacing: .18em;
}

/* ---------- 布局工具 ---------- */
.wrap {
  width: 100%;
  max-width: 1320px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-shell { padding-block: clamp(26px, 5vw, 64px); }

.section {
  padding-block: clamp(34px, 6vw, 80px);
  border-top: 1px solid rgba(43, 60, 80, .6);
}
.section:first-child { border-top: 0; }
.section--flush {
  border-top: 0;
  padding-top: 0;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 20px;
  margin-bottom: clamp(20px, 3vw, 36px);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--cyan);
}

.section-num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 44px);
  line-height: 1;
  letter-spacing: .04em;
  color: rgba(168, 182, 196, .35);
}

.section-title {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.3;
  letter-spacing: .01em;
  color: var(--paper);
}

.lede {
  max-width: 42ch;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 面包屑 ---------- */
.crumbs { margin-bottom: clamp(16px, 2.4vw, 28px); }

.crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}

.crumbs__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.crumbs__item + .crumbs__item::before {
  content: "/";
  color: var(--line);
}
.crumbs__item[aria-current="page"] { color: var(--paper); }

.crumbs__link {
  color: var(--muted);
  text-decoration: none;
  transition: color .18s var(--ease);
}
.crumbs__link:hover,
.crumbs__link:focus-visible { color: var(--cyan); }

/* ---------- 网格 ---------- */
.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.grid--split { grid-template-columns: 1fr; }

/* ---------- 图片容器 ---------- */
.media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: linear-gradient(135deg, #13243A 0%, #0C1828 58%, #0A1420 100%);
}
.media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: repeating-linear-gradient(115deg, rgba(33, 240, 208, .05) 0 1px, transparent 1px 34px);
}
.media__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: contrast(1.06) saturate(1.05);
}
.media--wide { aspect-ratio: 16 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }
.media--band { aspect-ratio: 21 / 9; }

.media__tag {
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 2;
  padding: 5px 9px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(6, 13, 22, .82);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.media__clip {
  position: absolute;
  top: 0;
  right: 0;
  z-index: 1;
  width: 56px;
  height: 56px;
  background: linear-gradient(225deg, rgba(226, 59, 255, .5) 0%, rgba(255, 61, 127, 0) 100%);
  clip-path: polygon(100% 0, 0 0, 100% 100%);
  pointer-events: none;
}

/* ---------- 卡片与标签 ---------- */
.card {
  position: relative;
  padding: clamp(16px, 2.4vw, 24px);
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--panel);
  box-shadow: 0 1px 0 rgba(0, 0, 0, .4);
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}
.card:hover { border-color: #3A4F68; }

.card--panel {
  background: linear-gradient(160deg, #13243A 0%, #101A27 100%);
}

.card__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.45;
  color: var(--paper);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(19, 36, 58, .6);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .12em;
  color: var(--muted);
}
.tag--cyan {
  border-color: transparent;
  background: var(--cyan);
  color: #06131A;
  font-weight: 700;
}
.tag--orange {
  border-color: transparent;
  background: var(--orange);
  color: #0B1219;
  font-weight: 700;
}

/* ---------- 分隔与速度线 ---------- */
.divider {
  height: 1px;
  margin-block: clamp(24px, 4vw, 40px);
  border: 0;
  background: linear-gradient(90deg, var(--line) 0%, rgba(43, 60, 80, 0) 100%);
}

.speedline {
  height: 1px;
  background: linear-gradient(90deg, var(--cyan) 0%, rgba(33, 240, 208, 0) 72%);
}
.speedline--orange {
  background: linear-gradient(90deg, var(--orange) 0%, rgba(255, 107, 26, 0) 72%);
}
.speedline--sprint {
  background: linear-gradient(90deg, var(--magenta-a) 0%, var(--magenta-b) 42%, rgba(255, 61, 127, 0) 100%);
}

/* ---------- 长文 ---------- */
.prose {
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.85;
  color: #DCE5EC;
}
.prose p + p { margin-top: 1em; }
.prose h2 {
  margin: 1.8em 0 .7em;
  font-family: var(--font-serif);
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.4;
  color: var(--paper);
}
.prose h3 {
  margin: 1.6em 0 .6em;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan);
}
.prose ul {
  display: flex;
  flex-direction: column;
  gap: .5em;
  margin: 1em 0;
}
.prose li {
  position: relative;
  padding-left: 18px;
}
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}
.prose a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(33, 240, 208, .4);
}
.prose strong { color: var(--paper); font-weight: 700; }

/* ---------- 阅读进度 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 2px;
  pointer-events: none;
}
.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--magenta-b) 58%, var(--orange) 100%);
}

/* ---------- 显现 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
html.js [data-reveal].is-in {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 平板：抽屉靠右成面板 ---------- */
@media (min-width: 768px) {
  .site-nav {
    max-width: 440px;
    margin-left: auto;
    border-left: 1px solid var(--line);
    box-shadow: -30px 0 60px rgba(0, 0, 0, .5);
  }
  .footer-top { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
  .grid--split {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }
}

/* ---------- 桌面：左侧竖向轨道导航 ---------- */
@media (min-width: 1024px) {
  body { padding-left: var(--rail); }

  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--rail);
    border-bottom: 0;
    border-right: 1px solid var(--line);
    background: rgba(7, 15, 26, .97);
  }

  .site-header::after {
    top: 0;
    left: auto;
    right: -1px;
    bottom: 0;
    width: 1px;
    height: auto;
    background: linear-gradient(180deg, var(--cyan) 0%, rgba(33, 240, 208, 0) 40%, rgba(255, 107, 26, 0) 70%, var(--orange) 100%);
  }

  .header-bar {
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 0;
    height: 100%;
    max-width: none;
    min-height: 0;
    padding: 18px 0 16px;
  }

  .brand {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }
  .brand__glyph {
    width: 38px;
    height: 38px;
    font-size: 18px;
  }
  .brand__type { align-items: center; }
  .brand__name {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-size: 14px;
    line-height: 1;
    letter-spacing: .18em;
  }
  .brand__sub { display: none; }

  .brand--footer { flex-direction: row; }
  .brand--footer .brand__name {
    writing-mode: horizontal-tb;
    font-size: 17px;
    letter-spacing: .02em;
  }
  .brand--footer .brand__sub { display: block; }

  .nav-toggle { display: none; }

  html.nav-open { overflow: visible; }

  .site-nav {
    position: static;
    inset: auto;
    z-index: auto;
    flex: 1 1 auto;
    min-height: 0;
    width: 100%;
    max-width: none;
    margin: 10px 0 0;
    padding: 14px 0 0;
    border-top: 1px solid var(--line);
    border-left: 0;
    box-shadow: none;
    background: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    overflow: visible;
    display: flex;
    flex-direction: column;
  }

  .site-nav__eyebrow { display: none; }

  .site-nav__list {
    flex: 1 1 auto;
    min-height: 0;
    margin-top: 0;
    overflow-y: auto;
    scrollbar-width: none;
    align-items: center;
  }
  .site-nav__list::-webkit-scrollbar { display: none; }

  .nav-link {
    flex-direction: column;
    align-items: center;
    gap: 5px;
    width: 100%;
    padding: 9px 0;
    border-bottom: 0;
    border-left: 2px solid transparent;
    font-size: 10.5px;
    line-height: 1.2;
    letter-spacing: .1em;
  }
  .nav-link__label {
    flex: 0 0 auto;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: .16em;
  }
  .nav-link__num {
    font-size: 9px;
    letter-spacing: .08em;
  }
  .nav-link:hover {
    background: rgba(33, 240, 208, .06);
  }
  .nav-link[aria-current="page"] {
    border-left-color: var(--cyan);
    background: rgba(33, 240, 208, .08);
  }
  .nav-link[aria-current="page"]::after { display: none; }

  .site-nav__foot {
    grid-template-columns: 1fr 1fr;
    gap: 6px;
    margin-top: 10px;
    padding: 12px 8px 0;
    border-top: 1px solid var(--line);
  }
  .site-nav__foot .btn {
    padding: 12px 4px;
    font-size: 10px;
    line-height: 1.25;
    letter-spacing: .12em;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    min-height: 54px;
  }

  .scroll-progress { left: var(--rail); }

  .footer-top {
    grid-template-columns: 1.5fr .8fr .8fr 1.3fr;
  }
}

@media (min-width: 1280px) {
  .footer-brandline { max-width: 24ch; }
}

/* ---------- 焦点 ---------- */
:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
  border-radius: 2px;
}
.nav-link:focus-visible,
.footer-list a:focus-visible { outline-offset: 2px; }

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  html.js [data-reveal] {
    opacity: 1;
    transform: none;
  }
  .scroll-progress__bar { transition: none; }
}