/* ==========================================================================
   必赢赛场 /assets/site.css
   共享外壳样式：reset、变量、中文排版、页头、页脚、通用组件、响应式
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; padding: 0; }

ul, ol { list-style: none; }

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

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

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

/* ---------- 2. 设计变量 ---------- */
:root {
  /* 色彩体系 */
  --c-midnight: #0B1220;      /* 午夜蓝底 55% */
  --c-midnight-deep: #070D18;
  --c-ink: #0E3B33;           /* 深墨绿 15% */
  --c-ink-light: #14564A;     /* 墨绿浅阶 6% */
  --c-gold: #F0A63C;          /* 熔金橙 8% */
  --c-gold-deep: #C77B22;     /* 熔金深阶 4% */
  --c-neon: #7CF29B;          /* 荧光绿 3% */
  --c-frost: #EAF2F4;         /* 冷霜白 8% */
  --c-mist: #93A6B4;          /* 雾灰蓝 5% */
  --c-line: #1F3A5C;          /* 蓝图线 3% */
  --c-glow: #FFD9A0;          /* 暖光晕 2% */
  --c-night: #16233F;         /* 夜场紫蓝 1% */
  --c-alert: #E2603F;         /* 警示赤橙 0.5% */

  /* 版式尺度 */
  --font-display: "Archivo Black", "Source Han Sans SC", "Noto Sans SC",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "Space Mono", "Roboto Mono", ui-monospace, SFMono-Regular,
    Menlo, Consolas, "Liberation Mono", monospace;

  --step-display: clamp(48px, 9vw, 120px);
  --step-h2: clamp(28px, 4.4vw, 44px);
  --step-h3: clamp(20px, 2.6vw, 26px);
  --step-h4: clamp(17px, 2vw, 19px);
  --step-body: clamp(15px, 1.2vw, 16px);
  --step-note: 12.5px;

  /* 结构与间距 */
  --shell: 1280px;
  --gutter: clamp(18px, 4vw, 56px);
  --radius-s: 6px;
  --radius-m: 14px;
  --radius-l: 26px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 3. 基础排版与画布 ---------- */
body {
  font-family: var(--font-body);
  font-size: var(--step-body);
  font-weight: 400;
  line-height: 1.75;
  color: var(--c-frost);
  background-color: var(--c-midnight);
  background-image:
    radial-gradient(900px 520px at 84% -8%, rgba(255, 217, 160, 0.10), transparent 62%),
    radial-gradient(760px 520px at 4% 14%, rgba(124, 242, 155, 0.07), transparent 60%),
    repeating-linear-gradient(0deg, rgba(31, 58, 92, 0.38) 0 1px, transparent 1px 80px),
    repeating-linear-gradient(90deg, rgba(31, 58, 92, 0.38) 0 1px, transparent 1px 80px);
  min-height: 100vh;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: 0.02em;
}

h1 { font-size: var(--step-h2); }
h2 { font-size: var(--step-h3); }
h3 { font-size: var(--step-h4); }

p { line-height: 1.8; }

a { transition: color 0.2s var(--ease), border-color 0.2s var(--ease); }
a:hover { color: var(--c-gold); }

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

#main-content { scroll-margin-top: 150px; }

/* ---------- 4. 容器与网格 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

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

.page-main { display: block; }

.prose {
  max-width: 40em;
  font-size: var(--step-body);
  line-height: 1.8;
  color: rgba(234, 242, 244, 0.86);
}
.prose p + p { margin-top: 1.1em; }
.prose strong { color: var(--c-frost); }

.grid { display: grid; gap: clamp(16px, 2.4vw, 30px); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.col-4 { grid-column: span 4; }
.col-6 { grid-column: span 6; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }

/* ---------- 5. 区块标题与注释 ---------- */
.section { padding: clamp(44px, 7vw, 96px) 0; }

.section-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: clamp(20px, 3vw, 36px);
}

.section-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--c-neon);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--step-h2);
  line-height: 1.14;
}

.side-note {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: var(--step-note);
  letter-spacing: 0.26em;
  color: var(--c-mist);
}

.rot-note {
  transform: rotate(-90deg);
  transform-origin: left top;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--c-mist);
  white-space: nowrap;
}

.rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, rgba(31, 58, 92, 0.95), rgba(31, 58, 92, 0));
}

/* ---------- 6. 按钮与标签 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  border: 1px solid transparent;
  border-radius: 999px;
  transition: transform 0.2s var(--ease), background-color 0.2s var(--ease),
    border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.btn--gold {
  background: linear-gradient(120deg, var(--c-gold), var(--c-gold-deep));
  color: #08111f;
  box-shadow: 0 14px 30px -18px rgba(240, 166, 60, 0.95);
}
.btn--gold:hover { color: #08111f; transform: translateY(-2px); }

.btn--ghost {
  border-color: rgba(240, 166, 60, 0.55);
  color: var(--c-gold);
  background: rgba(240, 166, 60, 0.06);
}
.btn--ghost:hover {
  color: var(--c-glow);
  background: rgba(240, 166, 60, 0.14);
  transform: translateY(-2px);
}

.btn--quiet {
  border-color: rgba(31, 58, 92, 0.95);
  color: var(--c-mist);
}
.btn--quiet:hover {
  color: var(--c-frost);
  border-color: rgba(147, 166, 180, 0.7);
  transform: translateY(-2px);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  border: 1px solid rgba(31, 58, 92, 0.95);
  border-radius: 4px;
  color: var(--c-mist);
}
.tag--live { border-color: rgba(124, 242, 155, 0.5); color: var(--c-neon); background: rgba(124, 242, 155, 0.08); }
.tag--gold { border-color: rgba(240, 166, 60, 0.5); color: var(--c-gold); background: rgba(240, 166, 60, 0.08); }
.tag--warn { border-color: rgba(226, 96, 63, 0.55); color: var(--c-alert); background: rgba(226, 96, 63, 0.08); }

/* ---------- 7. 面包屑 ---------- */
.breadcrumb { padding-top: 18px; }

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-mist);
}
.breadcrumb__list li { display: flex; align-items: center; gap: 8px; }
.breadcrumb__sep { color: var(--c-line); }
.breadcrumb a:hover { color: var(--c-gold); }

/* ---------- 8. 面板、数字、时间轴 ---------- */
.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 30px);
  background: linear-gradient(180deg, rgba(14, 59, 51, 0.62), rgba(11, 18, 32, 0.72));
  border: 1px solid rgba(31, 58, 92, 0.9);
  border-radius: var(--radius-m);
}

.panel--paper {
  background: linear-gradient(180deg, rgba(20, 86, 74, 0.55), rgba(11, 18, 32, 0.86));
  box-shadow: inset 0 1px 0 rgba(255, 217, 160, 0.18),
    0 22px 48px -34px rgba(0, 0, 0, 0.95);
}

.panel--flat {
  border-radius: 0;
  border-left: 0;
  border-right: 0;
  background: rgba(22, 35, 63, 0.5);
}

.num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  color: var(--c-gold);
}
.num--xl { display: block; font-size: clamp(56px, 10vw, 110px); line-height: 0.9; }
.num--lg { font-size: clamp(30px, 4.4vw, 48px); line-height: 1; }
.num--sm { font-size: 15px; color: var(--c-neon); }

.timeline { position: relative; padding-left: 28px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, rgba(124, 242, 155, 0.7), rgba(31, 58, 92, 0.9));
}

.timeline__item { position: relative; padding-bottom: 26px; }

.timeline__node {
  position: absolute;
  left: -25px;
  top: 7px;
  width: 10px;
  height: 10px;
  border: 1px solid var(--c-neon);
  border-radius: 50%;
  background: var(--c-midnight);
  transition: background-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.timeline__item:hover .timeline__node {
  background: var(--c-neon);
  box-shadow: 0 0 0 6px rgba(124, 242, 155, 0.15);
}

.timeline__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-mist);
}

/* ---------- 9. 图片容器（页面阶段放置图片） ---------- */
.media {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(31, 58, 92, 0.9);
  border-radius: var(--radius-m);
  background:
    radial-gradient(120% 90% at 78% 6%, rgba(255, 217, 160, 0.22), transparent 60%),
    linear-gradient(160deg, #12203A, #0B1220 72%);
}

.media img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.05);
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  background: radial-gradient(120% 100% at 50% 38%, transparent 44%, rgba(4, 8, 15, 0.72) 100%);
}

.media--wide { aspect-ratio: 16 / 9; }
.media--standard { aspect-ratio: 4 / 3; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }
.media--banner { aspect-ratio: 21 / 9; }

.media__placeholder {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: rgba(147, 166, 180, 0.75);
  text-align: center;
  padding: 16px;
}

.media__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 4;
  padding: 14px 18px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--c-glow);
}

/* ---------- 10. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(11, 18, 32, 0.95);
  border-bottom: 1px solid rgba(31, 58, 92, 0.9);
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -64px;
  z-index: 130;
  padding: 10px 16px;
  font-weight: 700;
  color: #08111f;
  background: var(--c-gold);
  border-radius: 0 0 var(--radius-s) var(--radius-s);
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 0; color: #08111f; }

.brand-bar {
  border-bottom: 1px solid rgba(31, 58, 92, 0.75);
  background: linear-gradient(90deg, rgba(14, 59, 51, 0.55), rgba(11, 18, 32, 0) 46%);
}

.brand-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 68px;
}

.brand { display: inline-flex; align-items: center; gap: 12px; }

.brand__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  font-family: var(--font-display);
  font-size: 19px;
  color: #08111f;
  background: linear-gradient(140deg, var(--c-gold), var(--c-gold-deep));
  border: 1px solid rgba(255, 217, 160, 0.7);
  border-radius: 10px;
  box-shadow: 0 10px 24px -14px rgba(240, 166, 60, 0.95);
}

.brand__text { display: flex; flex-direction: column; line-height: 1.25; }
.brand__name {
  font-family: var(--font-display);
  font-size: 19px;
  letter-spacing: 0.08em;
}
.brand__tagline {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-mist);
}

.brand:hover .brand__name { color: var(--c-gold); }
.brand:hover .brand__mark { box-shadow: 0 0 0 4px rgba(240, 166, 60, 0.16); }

.brand-bar__meta { display: flex; align-items: center; gap: 14px; }

.version-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-neon);
  background: rgba(124, 242, 155, 0.07);
  border: 1px solid rgba(124, 242, 155, 0.42);
  border-radius: 999px;
}

.version-chip__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-neon);
  box-shadow: 0 0 0 4px rgba(124, 242, 155, 0.18);
  animation: chip-pulse 2.8s var(--ease) infinite;
}

@keyframes chip-pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(124, 242, 155, 0.14); }
  50% { box-shadow: 0 0 0 7px rgba(124, 242, 155, 0.05); }
}

.meta-link {
  font-size: 13px;
  color: var(--c-mist);
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(147, 166, 180, 0.4);
}
.meta-link:hover { color: var(--c-gold); border-color: var(--c-gold); }

.nav-toggle {
  position: relative;
  z-index: 2;
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  font-size: 13px;
  letter-spacing: 0.08em;
  border: 1px solid rgba(31, 58, 92, 0.95);
  border-radius: 999px;
}
.nav-toggle[aria-expanded="true"] { border-color: var(--c-gold); color: var(--c-gold); }

.nav-toggle__bars { display: grid; gap: 4px; width: 16px; }
.nav-toggle__bars i {
  display: block;
  height: 2px;
  background: var(--c-gold);
  border-radius: 2px;
  transition: transform 0.25s var(--ease), opacity 0.25s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.nav-toggle__text { white-space: nowrap; }

.site-nav {
  position: relative;
  background: linear-gradient(180deg, rgba(22, 35, 63, 0.55), rgba(11, 18, 32, 0));
}

.site-nav__inner {
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 26px);
  min-height: 58px;
}

.nav-note {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.22em;
  color: var(--c-mist);
  white-space: nowrap;
}

.nav-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: clamp(4px, 1.4vw, 16px);
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 16px 10px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--c-mist);
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 9px;
  height: 2px;
  background: var(--c-gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.25s var(--ease);
}

.nav-link:hover { color: var(--c-frost); }
.nav-link:hover::after { transform: scaleX(0.45); }

.nav-link[aria-current="page"] { color: var(--c-frost); }
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  background: linear-gradient(90deg, var(--c-gold), var(--c-gold-deep));
}

.schedule-float {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border: 1px solid rgba(240, 166, 60, 0.5);
  border-radius: 999px;
  background: linear-gradient(120deg, rgba(240, 166, 60, 0.16), rgba(124, 242, 155, 0.08));
  transition: padding 0.28s var(--ease), background-color 0.28s var(--ease),
    border-color 0.28s var(--ease);
}

.schedule-float__label {
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--c-glow);
  white-space: nowrap;
}

.schedule-float__date {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: #08111f;
  background: var(--c-gold);
  border-radius: 50%;
}

.schedule-float:hover {
  border-color: var(--c-neon);
  background: linear-gradient(120deg, rgba(240, 166, 60, 0.28), rgba(124, 242, 155, 0.16));
}
.schedule-float:hover .schedule-float__label { color: var(--c-frost); }

.schedule-float.is-condensed { padding: 5px; }
.schedule-float.is-condensed .schedule-float__label { display: none; }

/* ---------- 11. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(60px, 9vw, 120px);
  padding-top: clamp(40px, 6vw, 74px);
  border-top: 1px solid rgba(31, 58, 92, 0.9);
  background: linear-gradient(180deg, rgba(14, 59, 51, 0.55), rgba(7, 13, 24, 0.96) 42%, #070D18);
}

.site-footer::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(240, 166, 60, 0.75), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.5fr 1fr;
  gap: clamp(24px, 4vw, 52px);
  padding-bottom: clamp(28px, 4vw, 48px);
}

.footer-col { min-width: 0; }
.footer-col--brand { display: flex; flex-direction: column; align-items: flex-start; }

.brand--footer .brand__name { font-size: 18px; }
.brand--footer .brand__mark { width: 34px; height: 34px; font-size: 17px; }

.footer-brand__line {
  margin-top: 16px;
  max-width: 24em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-mist);
}

.footer-col__title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: 0.2em;
  color: var(--c-gold);
}
.footer-col__title::before {
  content: "";
  width: 16px;
  height: 1px;
  background: var(--c-gold);
}

.footer-list li + li { margin-top: 9px; }

.footer-link {
  font-size: 14.5px;
  color: var(--c-mist);
  border-bottom: 1px solid transparent;
}
.footer-link:hover { color: var(--c-gold); border-color: rgba(240, 166, 60, 0.6); }

.footer-list--contact li + li { margin-top: 14px; }

.footer-contact__item { display: flex; flex-direction: column; gap: 2px; }

.footer-contact__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--c-mist);
}

.footer-contact__val {
  font-size: 14.5px;
  color: var(--c-frost);
  word-break: break-word;
}

.footer-note {
  margin-top: 14px;
  font-size: var(--step-note);
  line-height: 1.7;
  color: rgba(147, 166, 180, 0.92);
  max-width: 24em;
}

.footer-legal {
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: var(--step-note);
  letter-spacing: 0.08em;
  color: var(--c-mist);
}

.footer-scale {
  position: relative;
  height: 30px;
  border-top: 1px solid rgba(31, 58, 92, 0.85);
}
.footer-scale::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(147, 166, 180, 0.45) 0 1px,
    transparent 1px 32px
  );
  background-size: 100% 9px;
  background-repeat: repeat-x;
  background-position: left top;
}
.footer-scale__label {
  position: absolute;
  right: 0;
  top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: rgba(147, 166, 180, 0.7);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 18px 0 32px;
  border-top: 1px solid rgba(31, 58, 92, 0.6);
  font-size: var(--step-note);
  color: var(--c-mist);
}

.footer-seat {
  font-family: var(--font-mono);
  letter-spacing: 0.12em;
  color: rgba(147, 166, 180, 0.8);
}

/* ---------- 12. 显现（页面阶段用 data-reveal） ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.js [data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 13. 响应式 ---------- */
@media (max-width: 1100px) {
  .footer-grid { grid-template-columns: 1.2fr 1fr 1.4fr; }
  .footer-col--brand { grid-column: span 3; }
}

@media (max-width: 980px) {
  .nav-toggle { display: inline-flex; z-index: 110; }

  .brand-bar__inner { min-height: 62px; }
  .nav-note { display: none; }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 100;
    width: min(88vw, 344px);
    padding: 0;
    overflow-y: auto;
    background: linear-gradient(180deg, #0E3B33, #0B1220 46%);
    border-left: 1px solid rgba(240, 166, 60, 0.35);
    box-shadow: -30px 0 60px -30px rgba(0, 0, 0, 0.95);
    transform: translateX(102%);
    transition: transform 0.34s var(--ease);
  }

  .site-nav[data-open="true"] { transform: translateX(0); }

  .site-nav::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    background: rgba(4, 8, 15, 0.74);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s var(--ease);
  }
  .site-nav[data-open="true"]::before { opacity: 1; pointer-events: auto; }

  .site-nav__inner {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    min-height: 100%;
    padding-top: 92px;
    padding-bottom: 42px;
  }

  .nav-list {
    position: relative;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    margin-top: 4px;
    padding-left: 16px;
    border-left: 1px solid rgba(124, 242, 155, 0.25);
  }

  .nav-link {
    display: block;
    padding: 14px 8px 14px 16px;
    font-size: 16px;
    border-radius: 0 8px 8px 0;
  }
  .nav-link:hover { background: rgba(124, 242, 155, 0.07); }
  .nav-link::after { display: none; }

  .nav-link::before {
    content: "";
    position: absolute;
    left: -21px;
    top: 50%;
    width: 9px;
    height: 9px;
    margin-top: -4.5px;
    background: var(--c-midnight);
    border: 1px solid var(--c-neon);
    border-radius: 50%;
    transition: background-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
  }
  .nav-link:hover::before { background: rgba(124, 242, 155, 0.5); }

  .nav-link[aria-current="page"] { color: var(--c-gold); }
  .nav-link[aria-current="page"]::before {
    background: var(--c-neon);
    box-shadow: 0 0 0 5px rgba(124, 242, 155, 0.16);
  }

  .schedule-float {
    margin: 28px 0 0;
    justify-content: center;
    padding: 14px 16px;
    border-radius: 12px;
  }
  .schedule-float.is-condensed { padding: 14px 16px; }
  .schedule-float.is-condensed .schedule-float__label { display: inline; }
}

@media (max-width: 900px) {
  .grid--12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col-4, .col-6, .col-8 { grid-column: span 6; }
}

@media (max-width: 760px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-col--brand { grid-column: span 2; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .footer-scale__label { position: static; display: block; padding-top: 8px; }
}

@media (max-width: 560px) {
  .brand__tagline { display: none; }
  .version-chip { padding: 4px 9px; font-size: 11px; }
  .meta-link { display: none; }

  .grid--12 { grid-template-columns: minmax(0, 1fr); }
  .col-4, .col-6, .col-8, .col-12 { grid-column: span 1; }

  .footer-grid { grid-template-columns: 1fr; }
  .footer-col--brand { grid-column: span 1; }

  .media--banner { aspect-ratio: 16 / 9; }
}

/* ---------- 14. 降低动效偏好 ---------- */
@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;
  }

  .version-chip__dot { animation: none; }

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

  .btn:hover,
  .schedule-float:hover { transform: none; }
}