/* ============================================================
   MANXBET · 万博体育 — 全站共享样式 /assets/site.css
   设计语言：竞速数据面板 / MATCH DATA RELAY
   深空蓝 #0A1F44 × 电光橙 #FF6B00 × 金 #D4AF37
   ============================================================ */

/* ---------- 0. Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-text);
  background: var(--c-primary);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: Futura, 'Arial Black', 'Noto Sans SC', sans-serif;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: 0.02em;
}

p {
  margin-bottom: 1em;
}

::selection {
  background: var(--c-accent);
  color: var(--c-white);
}

:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
  border-radius: 0;
}

/* ---------- 1. Tokens ---------- */
:root {
  --c-primary: #0A1F44;
  --c-primary-deep: #071733;
  --c-primary-soft: #0A2A66;
  --c-accent: #FF6B00;
  --c-accent-light: #FF9A5C;
  --c-gold: #D4AF37;
  --c-gold-deep: #E6B800;
  --c-text: #F5F7FA;
  --c-text-muted: #B8C4D6;
  --c-surface: #E5E9F0;
  --c-white: #FFFFFF;
  --c-dark: #0A1F44;
  --c-dark-muted: #3D4F6B;

  --font-headline: Futura, 'Arial Black', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'Roboto Mono', 'SFMono-Regular', Consolas, monospace;

  --container: 1200px;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 2rem;
  --space-4: 3.5rem;
  --space-5: 5rem;
  --space-6: 8rem;

  --transition-fast: 0.2s ease;
  --transition-slow: 0.45s cubic-bezier(0.22, 1, 0.36, 1);

  --z-header: 100;
  --z-progress: 200;
  --z-skip: 1000;
}

/* ---------- 2. Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

#main-content {
  display: block;
  min-height: 60vh;
}

/* ---------- 3. Utilities ---------- */
.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
}

.speedline {
  display: block;
  height: 3px;
  background: repeating-linear-gradient(
    100deg,
    var(--c-accent) 0,
    var(--c-accent) 30px,
    transparent 30px,
    transparent 64px,
    var(--c-gold) 64px,
    var(--c-gold) 80px,
    transparent 80px,
    transparent 120px
  );
}

/* ---------- 4. Scroll progress ---------- */
[data-scroll-progress] {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--c-accent) 0%, var(--c-gold) 100%);
  box-shadow: 0 0 10px rgba(255, 107, 0, 0.55);
  z-index: var(--z-progress);
  pointer-events: none;
}

/* ---------- 5. Reveal ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.js [data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 6. Skip link ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: var(--z-skip);
  padding: 0.75rem 1.5rem;
  background: var(--c-accent);
  color: var(--c-primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  transform: translateY(-120%);
  transition: transform var(--transition-fast);
}

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

/* ---------- 7. Header ---------- */
.site-header {
  position: relative;
  z-index: var(--z-header);
  background: var(--c-primary);
  color: var(--c-text);
  box-shadow: 0 4px 24px rgba(4, 10, 30, 0.18);
  border-bottom: 1px solid rgba(255, 107, 0, 0.3);
}

.site-header__ticker {
  background: var(--c-primary-deep);
  border-bottom: 1px solid rgba(184, 196, 214, 0.12);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--c-text-muted);
}

.site-header__ticker-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding-top: 0.4rem;
  padding-bottom: 0.4rem;
}

.site-header__ticker-id {
  color: var(--c-text-muted);
}

.site-header__ticker-status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--c-accent-light);
}

.site-header__ticker-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-accent);
  box-shadow: 0 0 8px rgba(255, 107, 0, 0.6);
  animation: ticker-pulse 2s ease-in-out infinite alternate;
}

@keyframes ticker-pulse {
  from {
    opacity: 0.45;
    transform: scale(0.85);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.site-header__main {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: var(--space-3);
  padding-bottom: var(--space-1);
}

.site-header__brand {
  position: relative;
  padding: var(--space-1) var(--space-3);
}

.site-header__brand::before,
.site-header__brand::after {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  border-color: var(--c-gold);
  border-style: solid;
  opacity: 0.75;
}

.site-header__brand::before {
  top: 0;
  left: 0;
  border-width: 2px 0 0 2px;
}

.site-header__brand::after {
  bottom: 0;
  right: 0;
  border-width: 0 2px 2px 0;
}

.site-header__brand-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.site-header__brand-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  color: var(--c-gold);
  margin-bottom: 0.35rem;
}

.site-header__brand-tag::before,
.site-header__brand-tag::after {
  content: '';
  width: 18px;
  height: 1px;
  background: var(--c-gold);
  opacity: 0.5;
}

.site-header__brand-cn {
  font-family: var(--font-headline);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 900;
  letter-spacing: 0.12em;
  line-height: 1.2;
  color: var(--c-text);
  transform: skewX(-4deg);
}

.site-header__brand-en {
  font-size: 0.75rem;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-top: 0.25rem;
}

/* ---------- 8. Nav ---------- */
.site-nav__list {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.2rem;
  border-top: 1px solid rgba(184, 196, 214, 0.16);
  border-bottom: 1px solid rgba(184, 196, 214, 0.16);
  padding: 0.15rem 0;
}

.site-nav__link {
  display: block;
  padding: 0.7rem 1.2rem;
  font-family: var(--font-headline);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-text);
  position: relative;
  transition: color var(--transition-fast);
}

.site-nav__link::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0.25rem;
  width: 0;
  height: 3px;
  background: var(--c-accent);
  transform: translateX(-50%);
  transition: width var(--transition-fast);
}

.site-nav__link:hover {
  color: var(--c-accent-light);
}

.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after {
  width: 32px;
}

.site-nav__link[aria-current="page"] {
  color: var(--c-white);
  font-weight: 900;
}

.site-nav__meta {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  padding: 0.4rem 0 0.2rem;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--c-text-muted);
  opacity: 0.65;
}

/* ---------- 9. Nav toggle ---------- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 1rem;
  border: 1px solid rgba(184, 196, 214, 0.35);
  background: transparent;
  color: var(--c-text);
  transition: border-color var(--transition-fast);
}

.nav-toggle:hover {
  border-color: var(--c-accent);
}

.nav-toggle__box {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle__line {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--c-accent);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-toggle__text {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

/* ---------- 10. Header speedline ---------- */
.site-header__speedline {
  height: 3px;
  background: repeating-linear-gradient(
    100deg,
    var(--c-accent) 0,
    var(--c-accent) 30px,
    transparent 30px,
    transparent 64px,
    var(--c-gold) 64px,
    var(--c-gold) 80px,
    transparent 80px,
    transparent 120px
  );
}

/* ---------- 11. Footer ---------- */
.site-footer {
  background: var(--c-primary);
  color: var(--c-text-muted);
  border-top: 1px solid rgba(255, 107, 0, 0.25);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr;
  gap: var(--space-4);
  padding: var(--space-5) 0 var(--space-4);
}

.site-footer__brand-tag {
  display: block;
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  color: var(--c-gold);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

.site-footer__brand-cn {
  display: block;
  font-family: var(--font-headline);
  font-size: 1.8rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  line-height: 1.2;
  color: var(--c-text);
}

.site-footer__brand-en {
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-top: 0.2rem;
}

.site-footer__desc {
  margin-top: var(--space-2);
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--c-text-muted);
  max-width: 38ch;
}

.site-footer__verified {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: var(--space-2);
  padding: 0.3rem 0.7rem;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--c-gold);
  border: 1px solid rgba(212, 175, 55, 0.45);
  background: rgba(212, 175, 55, 0.06);
}

.site-footer__verified::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-gold);
  box-shadow: 0 0 6px rgba(212, 175, 55, 0.6);
}

.site-footer__col-title {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--c-accent);
  margin-bottom: var(--space-2);
  text-transform: uppercase;
}

.site-footer__link {
  display: block;
  padding: 0.3rem 0;
  color: var(--c-text-muted);
  font-size: 0.95rem;
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.site-footer__link:hover {
  color: var(--c-accent);
  padding-left: 0.35rem;
}

.site-footer__contact {
  padding: 0.28rem 0;
  font-size: 0.9rem;
  line-height: 1.7;
}

.site-footer__contact--icp {
  margin-top: 0.25rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--c-gold);
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) 0 var(--space-3);
  border-top: 1px solid rgba(184, 196, 214, 0.15);
}

.site-footer__copy {
  font-size: 0.85rem;
  color: var(--c-text-muted);
}

.site-footer__icp {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--c-text-muted);
}

/* ---------- 12. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.4rem;
  font-family: var(--font-headline);
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  line-height: 1;
  text-transform: uppercase;
  border: 2px solid transparent;
  border-radius: 0;
  cursor: pointer;
  transform: skewX(-3deg);
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn:hover {
  transform: translateY(-2px) skewX(-3deg);
}

.btn--primary {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: var(--c-primary);
}

.btn--primary:hover {
  background: var(--c-accent-light);
  border-color: var(--c-accent-light);
  box-shadow: 0 6px 18px rgba(255, 107, 0, 0.3);
}

.btn--ghost {
  border-color: rgba(245, 247, 250, 0.4);
  color: var(--c-text);
}

.btn--ghost:hover {
  background: rgba(245, 247, 250, 0.08);
  border-color: var(--c-text);
  box-shadow: none;
}

.btn--gold {
  background: var(--c-gold);
  border-color: var(--c-gold);
  color: var(--c-primary);
}

.btn--gold:hover {
  filter: brightness(1.08);
  box-shadow: 0 6px 18px rgba(212, 175, 55, 0.3);
}

.panel--light .btn--ghost {
  border-color: rgba(10, 31, 68, 0.35);
  color: var(--c-dark);
}

.panel--light .btn--ghost:hover {
  background: rgba(10, 31, 68, 0.06);
  border-color: var(--c-dark);
}

/* ---------- 13. Tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-text);
  background: rgba(184, 196, 214, 0.12);
  border: 1px solid rgba(184, 196, 214, 0.25);
  border-radius: 0;
}

.tag--gold {
  color: var(--c-gold);
  border-color: rgba(212, 175, 55, 0.5);
  background: rgba(212, 175, 55, 0.08);
}

.tag--orange {
  color: var(--c-accent);
  border-color: rgba(255, 107, 0, 0.5);
  background: rgba(255, 107, 0, 0.08);
}

/* ---------- 14. Panels ---------- */
.panel {
  padding: var(--space-5) 0;
}

.panel--light {
  background: var(--c-surface);
  color: var(--c-dark);
}

.panel--dark {
  background: var(--c-primary);
  color: var(--c-text);
}

/* ---------- 15. Section head / index / title ---------- */
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.section-index {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-accent);
}

.section-index::before {
  content: '';
  display: inline-block;
  width: 18px;
  height: 2px;
  background: var(--c-accent);
}

.section-index::after {
  content: '';
  display: inline-block;
  width: 40px;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--c-accent) 0 4px, transparent 4px 8px);
}

.section-title {
  display: inline-block;
  font-family: var(--font-headline);
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: 0.03em;
  color: inherit;
  transform: skewX(-4deg);
}

/* ---------- 16. Page heading ---------- */
.page-heading {
  padding: var(--space-4) 0 var(--space-3);
  background: var(--c-primary-soft);
  color: var(--c-text);
  border-bottom: 1px solid rgba(184, 196, 214, 0.18);
  margin-bottom: var(--space-4);
}

.page-heading__index {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--c-accent);
  margin-bottom: var(--space-1);
  text-transform: uppercase;
}

.page-heading__title {
  font-family: var(--font-headline);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: 0.04em;
  transform: skewX(-4deg);
}

.page-heading__crumb {
  margin-top: var(--space-2);
}

/* ---------- 17. Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--c-text-muted);
}

.breadcrumb__item a {
  color: var(--c-text-muted);
  transition: color var(--transition-fast);
}

.breadcrumb__item a:hover {
  color: var(--c-accent);
}

.breadcrumb__sep {
  opacity: 0.5;
}

.breadcrumb__current {
  color: var(--c-accent);
}

/* ---------- 18. Grid ---------- */
.grid-layout {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-3);
  align-items: start;
}

.col-span-3 {
  grid-column: span 3;
}

.col-span-4 {
  grid-column: span 4;
}

.col-span-6 {
  grid-column: span 6;
}

.col-span-8 {
  grid-column: span 8;
}

.col-span-12 {
  grid-column: 1 / -1;
}

/* ---------- 19. Image ratio ---------- */
.img-ratio {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: var(--c-primary-soft);
}

.img-ratio::before {
  content: '';
  display: block;
  padding-top: 56.25%;
}

.img-ratio--4x3::before {
  padding-top: 75%;
}

.img-ratio--1x1::before {
  padding-top: 100%;
}

.img-ratio--2x1::before {
  padding-top: 50%;
}

.img-ratio > * {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-ratio__placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.5rem;
  padding: var(--space-2);
  background:
    repeating-linear-gradient(
      135deg,
      rgba(255, 107, 0, 0.16) 0,
      rgba(255, 107, 0, 0.16) 2px,
      transparent 2px,
      transparent 14px
    ),
    linear-gradient(145deg, var(--c-primary-soft) 0%, var(--c-primary) 60%, #071733 100%);
  color: var(--c-text-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

/* ---------- 20. Sequence path (skill tree) ---------- */
.seq-path {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-2);
  margin-top: var(--space-3);
  counter-reset: seq;
}

.seq-path__node {
  counter-increment: seq;
  position: relative;
  padding: var(--space-2) var(--space-2) var(--space-2) var(--space-3);
  border-left: 2px solid var(--c-accent);
  background: rgba(245, 247, 250, 0.04);
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.seq-path__node:hover {
  background: rgba(255, 107, 0, 0.08);
  border-left-color: var(--c-accent-light);
}

.seq-path__node::before {
  content: '/' counter(seq, decimal-leading-zero) '/';
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--c-gold);
  margin-bottom: 0.4rem;
}

.panel--light .seq-path__node {
  background: rgba(10, 31, 68, 0.04);
}

.panel--light .seq-path__node:hover {
  background: rgba(255, 107, 0, 0.08);
}

/* ---------- 21. Segmented tabs ---------- */
.seg-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0.4rem;
  background: rgba(10, 31, 68, 0.04);
  border-bottom: 2px solid var(--c-accent);
}

.seg-tab {
  padding: 0.6rem 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--c-text-muted);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.seg-tab:hover {
  color: var(--c-text);
}

.seg-tab[aria-selected="true"] {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: var(--c-primary);
  font-weight: 700;
}

.panel--light .seg-tabs {
  background: rgba(10, 31, 68, 0.04);
}

.panel--light .seg-tab {
  color: var(--c-dark-muted);
}

.panel--light .seg-tab:hover {
  color: var(--c-dark);
}

/* ---------- 22. Content prose ---------- */
.content {
  max-width: 70ch;
}

.content a {
  color: var(--c-accent);
  border-bottom: 1px solid rgba(255, 107, 0, 0.4);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.content a:hover {
  color: var(--c-accent-light);
  border-color: var(--c-accent-light);
}

.content ul {
  padding-left: 1.2em;
  margin-bottom: 1em;
}

.content ul li {
  position: relative;
  padding-left: 0.35rem;
}

.content ul li::before {
  content: '/ ';
  font-family: var(--font-mono);
  color: var(--c-accent);
}

/* ---------- 23. Responsive: tablet ---------- */
@media (max-width: 1024px) {
  :root {
    --space-4: 2.5rem;
    --space-5: 4rem;
  }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
  }

  .site-footer__brand {
    grid-column: 1 / -1;
  }

  .grid-layout {
    gap: var(--space-2);
  }

  .col-span-3,
  .col-span-4 {
    grid-column: span 6;
  }

  .col-span-8 {
    grid-column: 1 / -1;
  }
}

/* ---------- 24. Responsive: nav breakpoint ---------- */
@media (max-width: 899px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-header__main {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-2);
    padding-bottom: var(--space-2);
  }

  .site-header__brand {
    padding: 0.25rem var(--space-2);
  }

  .site-header__brand-tag {
    display: none;
  }

  .site-header__brand-cn {
    font-size: 1.4rem;
  }

  .site-header__brand-en {
    font-size: 0.62rem;
    letter-spacing: 0.28em;
  }

  .site-header__brand::before,
  .site-header__brand::after {
    width: 10px;
    height: 10px;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 3px);
    left: 0;
    right: 0;
    width: auto;
    background: var(--c-primary-soft);
    border-top: 2px solid var(--c-accent);
    box-shadow: 0 24px 32px rgba(3, 8, 25, 0.35);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
  }

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

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.4rem 0;
    border: none;
  }

  .site-nav__item {
    width: 100%;
  }

  .site-nav__link {
    padding: 0.85rem 1.25rem;
    font-size: 0.9rem;
    border-left: 3px solid transparent;
  }

  .site-nav__link::after {
    display: none;
  }

  .site-nav__link:hover {
    background: rgba(255, 107, 0, 0.08);
    color: var(--c-accent-light);
  }

  .site-nav__link[aria-current="page"] {
    border-left-color: var(--c-accent);
    background: rgba(255, 107, 0, 0.1);
    color: var(--c-accent-light);
  }

  .site-nav__meta {
    display: none;
  }
}

/* ---------- 25. Responsive: mobile ---------- */
@media (max-width: 768px) {
  .container {
    padding-inline: var(--space-2);
  }
}

@media (max-width: 640px) {
  .site-header__ticker-inner {
    gap: 0.75rem;
  }

  .site-header__ticker-time {
    display: none;
  }

  .site-header__ticker-id,
  .site-header__ticker-status {
    font-size: 0.62rem;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
  }

  .site-footer__brand {
    grid-column: auto;
  }

  .site-footer__bottom {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-1);
  }

  .grid-layout {
    grid-template-columns: repeat(4, 1fr);
  }

  .col-span-3,
  .col-span-4,
  .col-span-6,
  .col-span-8 {
    grid-column: 1 / -1;
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  .section-title {
    transform: none;
  }

  .page-heading__title {
    transform: none;
  }
}

/* ---------- 26. Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto !important;
  }

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