/* ==========================================================================
   东赢电竞局 · 共享样式表 /assets/site.css
   主题：夜间数据指挥舱 · 侧边轨道导航 · 纵向叙事长卷
   ========================================================================== */

:root {
  --ink-900: #050B14;
  --ink-800: #0B1A2B;
  --ink-700: #102A3E;
  --cyan: #00E5D0;
  --cyan-soft: #52F7E6;
  --magenta: #FF2E88;
  --amber: #FFB33A;
  --violet: #7C5CFF;
  --wine: #8E1B3A;
  --paper: #E8F1F8;
  --muted: #9FB3C8;
  --emerald: #1F8A70;
  --orange: #FF5A3C;

  --rail-w: 88px;
  --header-h: 60px;
  --wrap: 1280px;
  --gutter: clamp(18px, 4vw, 48px);

  --f-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Consolas, monospace;
  --f-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;

  --t-12: 0.75rem;
  --t-14: 0.875rem;
  --t-16: 1rem;
  --t-20: 1.25rem;
  --t-28: 1.75rem;
  --t-40: 2.5rem;
  --t-64: 4rem;
  --t-96: 6rem;

  --ease: cubic-bezier(.22, .61, .36, 1);
  --line: rgba(159, 179, 200, .18);
  --line-soft: rgba(159, 179, 200, .10);
  --line-strong: rgba(0, 229, 208, .42);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--ink-900);
  background-image:
    radial-gradient(1100px 620px at 88% -8%, rgba(0, 229, 208, .07), transparent 62%),
    radial-gradient(760px 520px at 6% 104%, rgba(124, 92, 255, .08), transparent 66%);
  background-repeat: no-repeat;
  color: var(--paper);
  font-family: var(--f-sans);
  font-size: var(--t-16);
  line-height: 1.75;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.24;
  color: var(--paper);
}

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--cyan-soft); }

img, svg, video { max-width: 100%; height: auto; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; }

code, pre, kbd, samp, .mono, .num {
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

hr { border: 0; }

::selection { background: rgba(0, 229, 208, .28); color: #FFFFFF; }

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

/* ---------- 通用工具 ---------- */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

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

.mono-label {
  font-family: var(--f-mono);
  font-size: var(--t-12);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: 50%;
  z-index: 400;
  transform: translate(-50%, -140%);
  padding: 10px 22px;
  background: var(--cyan);
  color: var(--ink-900);
  font-size: var(--t-14);
  font-weight: 700;
  border-radius: 0 0 4px 4px;
  transition: transform .22s var(--ease);
}
.skip-link:focus { transform: translate(-50%, 0); color: var(--ink-900); }

/* ---------- 滚动进度 ---------- */
.scroll-progress {
  position: fixed;
  top: 0; right: 0; bottom: 0;
  width: 2px;
  z-index: 320;
  transform: scaleY(0);
  transform-origin: top center;
  background: linear-gradient(180deg, var(--cyan), var(--violet) 55%, var(--magenta));
  pointer-events: none;
}

/* ==========================================================================
   头部 · 侧边轨道
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0; bottom: 0; left: 0;
  z-index: 300;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 18px 0 20px;
  background: linear-gradient(180deg, var(--ink-800), #08131F 60%, var(--ink-900));
  border-right: 1px solid var(--line);
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  flex: 0 0 auto;
  text-decoration: none;
}

.brand-mark {
  width: 44px; height: 44px;
  display: grid;
  place-items: center;
  font-family: var(--f-sans);
  font-size: 20px;
  font-weight: 900;
  color: var(--cyan);
  background: linear-gradient(150deg, rgba(0, 229, 208, .16), rgba(0, 229, 208, 0) 72%);
  border: 1px solid var(--line-strong);
  clip-path: polygon(0 0, 100% 0, 100% 74%, 74% 100%, 0 100%);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.brand:hover .brand-mark { color: #FFFFFF; border-color: var(--cyan); }

.brand-name {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.season-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  margin: 14px 10px 0;
  padding: 8px 6px;
  border: 1px solid var(--line);
  background: rgba(16, 42, 62, .55);
  font-family: var(--f-mono);
  font-size: 10px;
  line-height: 1.45;
  letter-spacing: .04em;
  color: var(--muted);
  text-align: center;
}

.season-dot {
  width: 6px; height: 6px;
  flex: 0 0 auto;
  background: var(--emerald);
  box-shadow: 0 0 0 0 rgba(31, 138, 112, .7);
  animation: season-pulse 2.6s var(--ease) infinite;
}
@keyframes season-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(31, 138, 112, .65); }
  70%  { box-shadow: 0 0 0 7px rgba(31, 138, 112, 0); }
  100% { box-shadow: 0 0 0 0 rgba(31, 138, 112, 0); }
}
.season-text { display: block; }

/* 移动菜单按钮（桌面隐藏） */
.nav-toggle {
  display: none;
  flex: 0 0 auto;
  width: 44px; height: 44px;
  padding: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  background: rgba(0, 229, 208, .07);
  cursor: pointer;
  transition: background .2s var(--ease), border-color .2s var(--ease);
}
.nav-toggle:hover { background: rgba(0, 229, 208, .14); border-color: var(--cyan); }
.nav-toggle-bars { display: flex; flex-direction: column; gap: 4px; width: 20px; }
.nav-toggle-bars i {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--cyan);
  transition: transform .26s var(--ease), opacity .18s 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); }

/* 导航主体 */
.site-nav {
  width: 100%;
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  padding: 16px 0 0;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--ink-700) transparent;
}

.nav-title { display: none; }

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  width: 100%;
}

.nav-link {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding: 11px 4px;
  color: var(--muted);
  border-left: 2px solid transparent;
  transition: color .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
}
.nav-glyph {
  font-family: var(--f-mono);
  font-size: 10px;
  line-height: 1;
  letter-spacing: .06em;
  color: rgba(255, 179, 58, .62);
  transition: color .2s var(--ease);
}
.nav-label {
  font-size: 11px;
  line-height: 1.25;
  letter-spacing: .02em;
  font-weight: 500;
  text-align: center;
}
.nav-link:hover {
  color: var(--paper);
  background: rgba(0, 229, 208, .07);
}
.nav-link:hover .nav-glyph { color: var(--amber); }
.nav-link[aria-current="page"] {
  color: var(--cyan);
  background: linear-gradient(90deg, rgba(0, 229, 208, .18), rgba(0, 229, 208, 0) 92%);
  border-left-color: var(--cyan);
}
.nav-link[aria-current="page"] .nav-glyph { color: var(--cyan); }
.nav-link[aria-current="page"] .nav-label { font-weight: 700; }

.nav-actions {
  width: 100%;
  margin-top: auto;
  padding: 14px 10px 0;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.nav-cta {
  display: block;
  padding: 9px 6px;
  text-align: center;
  font-size: 11px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: .02em;
  color: var(--ink-900);
  background: var(--cyan);
  border: 1px solid var(--cyan);
  transition: background .2s var(--ease), color .2s var(--ease), transform .2s var(--ease);
}
.nav-cta:hover { color: var(--ink-900); background: var(--cyan-soft); transform: translateY(-1px); }

.nav-util { display: none; }

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 104px);
  background: linear-gradient(180deg, var(--ink-800), var(--ink-900));
  border-top: 1px solid var(--line);
}
.site-footer::before {
  content: "";
  display: block;
  height: 8px;
  background: linear-gradient(90deg, var(--cyan), var(--magenta) 44%, var(--violet) 70%, var(--amber));
  opacity: .5;
}

.footer-inner {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 76px) var(--gutter) clamp(28px, 4vw, 48px);
  display: grid;
  grid-template-columns: minmax(240px, 1.05fr) 2fr;
  gap: clamp(28px, 5vw, 68px);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 12px;
}
.footer-logo-mark {
  width: 36px; height: 36px;
  display: grid;
  place-items: center;
  font-size: 17px;
  font-weight: 900;
  color: var(--cyan);
  border: 1px solid var(--line-strong);
  background: rgba(0, 229, 208, .08);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
}
.footer-logo-text {
  font-size: var(--t-20);
  font-weight: 900;
  letter-spacing: .01em;
  color: var(--paper);
}

.footer-tagline {
  margin: 0 0 14px;
  font-family: var(--f-mono);
  font-size: var(--t-12);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cyan);
}
.footer-note {
  margin: 0;
  max-width: 34em;
  font-size: var(--t-14);
  line-height: 1.7;
  color: var(--muted);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(24px, 4vw, 48px);
}

.footer-col-title {
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--f-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--cyan);
}

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

.footer-link {
  display: block;
  padding: 6px 0;
  font-size: var(--t-14);
  color: var(--muted);
  transition: color .2s var(--ease), padding-left .2s var(--ease);
}
.footer-link:hover { color: var(--cyan); padding-left: 6px; }

.footer-dl {
  margin: 0;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 8px 14px;
  font-size: var(--t-14);
}
.footer-dl dt {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
  padding-top: 4px;
}
.footer-dl dd {
  margin: 0;
  color: var(--paper);
  line-height: 1.65;
  word-break: break-word;
}

.footer-base {
  border-top: 1px solid var(--line);
  padding: 22px var(--gutter) 30px;
}
.footer-base-row {
  max-width: var(--wrap);
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 28px;
  font-family: var(--f-mono);
  font-size: var(--t-12);
  letter-spacing: .06em;
  color: var(--muted);
}
.footer-legal { margin: 0; color: var(--amber); }
.footer-closing { margin: 0; flex: 1 1 300px; }
.footer-copy { margin: 0; }

/* ==========================================================================
   排版与标题体系
   ========================================================================== */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--f-mono);
  font-size: var(--t-12);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cyan);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
  flex: 0 0 auto;
}

.sec-num {
  display: block;
  font-family: var(--f-mono);
  font-size: clamp(40px, 8vw, 96px);
  font-weight: 700;
  line-height: .9;
  letter-spacing: -.02em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(0, 229, 208, .5);
  font-variant-numeric: tabular-nums;
}
.sec-num--solid {
  color: var(--amber);
  -webkit-text-stroke: 0;
}

.sec-title {
  font-size: clamp(22px, 3.2vw, 28px);
  font-weight: 800;
  letter-spacing: -.01em;
  margin: 0 0 12px;
}

.lede {
  max-width: 68ch;
  font-size: var(--t-16);
  line-height: 1.78;
  color: var(--muted);
}

/* ==========================================================================
   布局元件
   ========================================================================== */
.section {
  position: relative;
  padding-block: clamp(48px, 8vw, 104px);
}
.section--band { background: var(--ink-800); }
.section--tight { padding-block: clamp(32px, 5vw, 64px); }

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
}

.divider-band {
  height: 8px;
  border: 0;
  margin: 0;
  background: linear-gradient(90deg, var(--cyan), var(--magenta) 42%, var(--violet) 68%, var(--amber));
  opacity: .5;
}
.divider-band--thick { height: 24px; }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 22px;
  font-family: var(--f-mono);
  font-size: var(--t-12);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
}
.breadcrumb-sep { color: rgba(159, 179, 200, .38); }
.breadcrumb a { color: var(--muted); border-bottom: 1px solid transparent; padding-bottom: 1px; }
.breadcrumb a:hover { color: var(--cyan); border-bottom-color: var(--cyan); }
.breadcrumb-current { color: var(--paper); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 26px;
  font-family: var(--f-sans);
  font-size: var(--t-14);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}
.btn:active { transform: translateY(1px); }

.btn-primary { background: var(--cyan); color: var(--ink-900); border-color: var(--cyan); }
.btn-primary:hover { background: var(--cyan-soft); color: var(--ink-900); border-color: var(--cyan-soft); }

.btn-ghost { background: transparent; color: var(--paper); border-color: var(--line-strong); }
.btn-ghost:hover { color: var(--cyan); border-color: var(--cyan); background: rgba(0, 229, 208, .07); }

.btn-magenta { background: var(--magenta); color: #FFFFFF; border-color: var(--magenta); }
.btn-magenta:hover { background: #FF5AA0; color: #FFFFFF; border-color: #FF5AA0; }

.copy-btn {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: 5px 11px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}
.copy-btn:hover { color: var(--cyan); border-color: var(--line-strong); background: rgba(0, 229, 208, .06); }
.copy-btn[data-copied] { color: var(--emerald); border-color: rgba(31, 138, 112, .7); }

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--line);
  background: rgba(16, 42, 62, .62);
  white-space: nowrap;
}
.tag--cyan { color: var(--cyan); border-color: rgba(0, 229, 208, .42); }
.tag--magenta { color: var(--magenta); border-color: rgba(255, 46, 136, .42); }
.tag--amber { color: var(--amber); border-color: rgba(255, 179, 58, .42); }
.tag--violet { color: var(--violet); border-color: rgba(124, 92, 255, .45); }
.tag--wine { color: #E88A9F; border-color: rgba(142, 27, 58, .8); }

/* ---------- 面板 ---------- */
.panel {
  position: relative;
  padding: clamp(20px, 3vw, 28px);
  background: var(--ink-800);
  border: 1px solid var(--line);
  transition: border-color .25s var(--ease), transform .25s var(--ease), background .25s var(--ease);
}
.panel::before,
.panel::after {
  content: "";
  position: absolute;
  width: 14px; height: 14px;
  border-color: var(--cyan);
  border-style: solid;
  pointer-events: none;
  opacity: .8;
}
.panel::before { top: -1px; left: -1px; border-width: 2px 0 0 2px; }
.panel::after { bottom: -1px; right: -1px; border-width: 0 2px 2px 0; }
.panel:hover {
  border-color: var(--line-strong);
  background: var(--ink-700);
  transform: translateY(-4px);
}
.panel--flat:hover { transform: none; }

.panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}
.panel-title {
  font-size: var(--t-20);
  font-weight: 800;
  margin: 0;
  color: var(--paper);
}
.panel-body { font-size: var(--t-16); color: var(--muted); }
.panel-body p { margin-bottom: .8em; }

/* ---------- 横向数据带 ---------- */
.data-strip {
  position: relative;
  display: flex;
  flex-wrap: nowrap;
  border: 1px solid var(--line);
  background: rgba(11, 26, 43, .9);
  overflow: hidden;
}
.data-strip::before {
  content: "";
  position: absolute;
  top: 0; bottom: 0; left: 0;
  width: 140px;
  margin-left: 0;
  background: linear-gradient(90deg, transparent, rgba(0, 229, 208, .16), transparent);
  pointer-events: none;
  z-index: 3;
  animation: strip-scan 6s linear infinite;
}
@keyframes strip-scan {
  0%   { transform: translateX(-140px); }
  100% { transform: translateX(1400%); }
}

.data-strip__cell {
  flex: 1 1 0;
  min-width: 152px;
  padding: 18px 20px;
  border-right: 1px solid var(--line);
  position: relative;
}
.data-strip__cell:last-child { border-right: 0; }
.data-strip__label {
  margin: 0 0 8px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
}
.data-strip__value {
  margin: 0;
  font-family: var(--f-mono);
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}
.data-strip__value--amber { color: var(--amber); }
.data-strip__value--magenta { color: var(--magenta); }
.data-strip__value--paper { color: var(--paper); }
.data-strip__note {
  margin: 6px 0 0;
  font-size: var(--t-12);
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- 图片容器 ---------- */
.img-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  background:
    linear-gradient(160deg, var(--ink-700), var(--ink-900) 70%),
    var(--ink-900);
}
.img-frame--wide { aspect-ratio: 21 / 9; }
.img-frame--tall { aspect-ratio: 3 / 4; }
.img-frame--square { aspect-ratio: 1 / 1; }

.img-frame > img,
.img-frame > svg,
.img-frame > picture,
.img-frame > picture > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.img-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background: repeating-linear-gradient(180deg, rgba(232, 241, 248, .05) 0 1px, transparent 1px 3px);
}
.img-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(5, 11, 20, 0) 52%, rgba(5, 11, 20, .76) 100%);
}

/* ---------- 筛选 ---------- */
.filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 26px;
}
.filter-btn {
  padding: 8px 16px;
  font-family: var(--f-mono);
  font-size: var(--t-12);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  cursor: pointer;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}
.filter-btn:hover { color: var(--cyan); border-color: var(--line-strong); }
.filter-btn[aria-pressed="true"] {
  color: var(--ink-900);
  background: var(--cyan);
  border-color: var(--cyan);
}

[hidden] { display: none !important; }

/* ---------- 显现动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 折叠区 ---------- */
.fold {
  border-top: 1px solid var(--line);
  padding-top: 14px;
  margin-top: 14px;
}
.fold-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  font-family: var(--f-mono);
  font-size: var(--t-12);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cyan);
  list-style: none;
}
.fold-summary::-webkit-details-marker { display: none; }
.fold-summary::after {
  content: "+";
  font-size: var(--t-16);
  line-height: 1;
  color: var(--cyan);
}
details[open] > .fold-summary::after { content: "−"; }
.fold-content { padding-top: 12px; color: var(--muted); font-size: var(--t-14); }

/* ==========================================================================
   断点：>= 1024px 轨道常驻；< 1024px 顶栏 + 抽屉
   ========================================================================== */
@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }
}

@media (max-width: 1023px) {
  html { scroll-padding-top: 76px; }

  body { padding-top: var(--header-h); }
  body.nav-open { overflow: hidden; }

  .scroll-progress { top: var(--header-h); width: 3px; }

  .site-header {
    top: 0; bottom: auto; left: 0; right: 0;
    width: 100%;
    height: var(--header-h);
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    padding: 0 16px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    background: rgba(11, 26, 43, .96);
    backdrop-filter: blur(10px);
  }

  .brand { flex-direction: row; align-items: center; gap: 10px; }
  .brand-mark { width: 34px; height: 34px; font-size: 16px; }
  .brand-name {
    position: static;
    width: auto; height: auto;
    margin: 0;
    overflow: visible;
    clip-path: none;
    white-space: nowrap;
    font-size: var(--t-16);
    font-weight: 900;
    letter-spacing: .01em;
    color: var(--paper);
    border: 0;
  }

  .season-chip {
    flex-direction: row;
    align-items: center;
    gap: 6px;
    margin: 0 0 0 auto;
    padding: 5px 9px;
    white-space: nowrap;
  }
  .season-text { font-size: 10px; letter-spacing: .02em; }

  .nav-toggle { display: flex; }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    right: 0;
    bottom: 0;
    left: 0;
    width: auto;
    flex: none;
    padding: 22px var(--gutter) 40px;
    background: linear-gradient(180deg, var(--ink-800), var(--ink-900));
    border-top: 1px solid var(--line);
    transform: translateX(100%);
    visibility: hidden;
    overflow-y: auto;
    transition: transform .3s var(--ease), visibility .3s var(--ease);
  }
  .site-nav[data-open] {
    transform: translateX(0);
    visibility: visible;
  }

  .nav-title {
    display: block;
    margin: 0 0 14px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--line);
    font-family: var(--f-mono);
    font-size: 11px;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--muted);
  }

  .nav-list { gap: 0; }

  .nav-link {
    flex-direction: row;
    align-items: baseline;
    gap: 14px;
    padding: 15px 8px;
    border-left: 0;
    border-bottom: 1px solid var(--line);
  }
  .nav-glyph { font-size: 11px; }
  .nav-label { font-size: var(--t-16); font-weight: 600; text-align: left; }
  .nav-link[aria-current="page"] {
    background: rgba(0, 229, 208, .08);
    border-bottom-color: var(--cyan);
    border-left-color: transparent;
  }

  .nav-actions {
    margin-top: 26px;
    padding: 0;
    border-top: 0;
    gap: 6px;
  }
  .nav-cta { padding: 15px 18px; font-size: var(--t-14); }
  .nav-util {
    display: block;
    padding: 12px 4px;
    font-size: var(--t-14);
    color: var(--muted);
    border-bottom: 1px dashed var(--line);
    transition: color .2s var(--ease), padding-left .2s var(--ease);
  }
  .nav-util:hover { color: var(--cyan); padding-left: 10px; }

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

@media (max-width: 900px) {
  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  body { font-size: 15px; line-height: 1.7; }

  .grid-12 { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
  .footer-cols { grid-template-columns: 1fr; }
  .footer-dl { grid-template-columns: 1fr; gap: 4px; }
  .footer-dl dt { padding-top: 10px; }
  .footer-dl dd { margin-bottom: 6px; }
  .footer-base-row { flex-direction: column; align-items: flex-start; gap: 8px; }

  .data-strip { overflow-x: auto; }
  .data-strip__cell { min-width: 168px; }

  .panel { padding: 18px; }
  .btn { padding: 13px 20px; width: 100%; }
}

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