/* ==========================================================================
   大嬴体育登录 · courtside-daying.com.cn
   /assets/site.css —— 共享外壳：reset / tokens / 中文排版 / header / footer / 基础组件
   ========================================================================== */

/* ---------- 1. Tokens ---------- */
:root {
  --ink: #0A0D0C;
  --panel: #0B1F1A;
  --panel-2: #12352C;
  --volt: #E6FF3B;
  --cyan: #19F7D2;
  --orange: #FF7A1A;
  --gray: #8F9A95;
  --white: #F3F6F0;
  --red: #FF4D4D;

  --grid: rgba(25, 247, 210, 0.055);
  --hair: rgba(25, 247, 210, 0.28);
  --hair-soft: rgba(25, 247, 210, 0.14);

  --rail-w: 272px;
  --wrap: 1180px;
  --gut: 24px;

  --font-display: "Oswald", "Barlow Condensed", "Archivo Narrow", "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --hard: 6px 6px 0 rgba(25, 247, 210, 0.26);
  --hard-warm: 6px 6px 0 rgba(255, 122, 26, 0.30);
  --hard-dark: 5px 5px 0 rgba(0, 0, 0, 0.42);

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur: 160ms;
}

/* ---------- 2. Reset & 中文排版 ---------- */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--ink);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.005em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

h1, h2, h3, h4, h5 {
  margin: 0 0 0.55em;
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.012em;
  color: var(--white);
}

h1 { font-size: clamp(30px, 5vw, 54px); }
h2 { font-size: clamp(24px, 3.2vw, 38px); }
h3 { font-size: clamp(19px, 2.2vw, 25px); }

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

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

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

button { font: inherit; color: inherit; }

table { border-collapse: collapse; }

::selection { background: var(--volt); color: var(--ink); }

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

.text-muted { color: var(--gray); font-size: 14px; line-height: 1.8; }

/* ---------- 3. Skip link ---------- */
.skip-link {
  position: absolute;
  left: 12px;
  top: -80px;
  z-index: 200;
  display: inline-block;
  padding: 10px 18px;
  background: var(--volt);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  border: 2px solid var(--ink);
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 12px; color: var(--ink); }

#main-content { scroll-margin-top: 20px; }

/* ---------- 4. 桌面端左侧轨道让位 ---------- */
@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }
}

/* ---------- 5. Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--rail-w);
  z-index: 80;
  display: flex;
  flex-direction: column;
  background: linear-gradient(180deg, #0B1F1A 0%, #0A0D0C 72%);
  border-right: 2px solid var(--panel-2);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 28px 28px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.95), transparent 86%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.95), transparent 86%);
}

.rail {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
  height: 100%;
  min-height: 0;
  padding: 22px 18px 20px;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.rail-head {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  border: 2px solid var(--panel-2);
  background: rgba(18, 53, 44, 0.5);
  color: var(--white);
  text-decoration: none;
  box-shadow: var(--hard-dark);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.brand:hover,
.brand:focus-visible {
  color: var(--white);
  border-color: var(--cyan);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(25, 247, 210, 0.22);
}

.brand__tag {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  background: var(--volt);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand__body { display: block; min-width: 0; }

.brand__name {
  display: block;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0.02em;
}

.brand__sub {
  display: block;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray);
}

.nav-toggle {
  display: none;
  position: relative;
  z-index: 88;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  background: transparent;
  border: 2px solid var(--panel-2);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); }

.nav-toggle__bars { display: grid; gap: 4px; width: 18px; }
.nav-toggle__bars i {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav-toggle[data-open] {
  color: var(--volt);
  border-color: var(--volt);
  background: rgba(230, 255, 59, 0.08);
}
.nav-toggle[data-open] .nav-toggle__bars i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[data-open] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.nav-toggle[data-open] .nav-toggle__bars i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.rail-status {
  margin: 0;
  padding-left: 10px;
  border-left: 2px solid var(--orange);
  font-family: var(--font-mono);
  font-size: 10.5px;
  line-height: 1.8;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
}

.rail-nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  margin-top: 4px;
}

.rail-nav__label {
  margin: 0 0 2px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--panel-2);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gray);
}

.rail-list { display: flex; flex-direction: column; gap: 2px; }

.rail-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 11px;
  border: 2px solid transparent;
  border-left: 2px solid var(--panel-2);
  color: var(--gray);
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.4;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.rail-link__idx {
  min-width: 18px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: rgba(25, 247, 210, 0.55);
}
.rail-link__text { display: block; }

.rail-link:hover,
.rail-link:focus-visible {
  color: var(--white);
  background: rgba(25, 247, 210, 0.07);
  border-left-color: var(--cyan);
  transform: translateX(2px);
}

.rail-link[aria-current="page"] {
  color: var(--ink);
  background: var(--volt);
  border-color: var(--volt);
  box-shadow: 3px 3px 0 rgba(25, 247, 210, 0.38);
}
.rail-link[aria-current="page"] .rail-link__idx { color: #33420a; }

.rail-cta {
  display: block;
  margin-top: 8px;
  padding: 12px 14px;
  text-align: center;
  color: #1A0A00;
  background: var(--orange);
  border: 2px solid #FFA257;
  box-shadow: 4px 4px 0 rgba(230, 255, 59, 0.34);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1.3;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), background var(--dur) var(--ease);
}
.rail-cta:hover,
.rail-cta:focus-visible {
  color: #1A0A00;
  background: #FF8C3D;
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 rgba(230, 255, 59, 0.5);
}

.rail-note {
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed var(--panel-2);
  font-size: 12px;
  line-height: 1.7;
  color: var(--gray);
}

.rail-foot {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: auto;
  padding-top: 14px;
  border-top: 2px solid var(--panel-2);
}

.rail-readout { display: flex; flex-direction: column; gap: 4px; margin: 0; }
.rail-readout__label {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gray);
}
.rail-readout__value {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--volt);
  word-break: break-word;
}
.rail-readout__value:empty::before { content: "—"; color: var(--panel-2); }

.rail-foot__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: rgba(143, 154, 149, 0.7);
  word-break: break-all;
}

.rail-scrim { display: none; }

/* ---------- 6. 阅读进度条 ---------- */
.read-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 90;
  background: rgba(25, 247, 210, 0.1);
  pointer-events: none;
}
.read-progress__fill {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--cyan), var(--volt));
  box-shadow: 0 0 12px rgba(25, 247, 210, 0.55);
}

@media (min-width: 1024px) {
  .read-progress { left: var(--rail-w); }
}

/* ---------- 7. Footer ---------- */
.site-footer {
  position: relative;
  margin-top: 80px;
  padding: 54px 0 34px;
  background: linear-gradient(180deg, rgba(11, 31, 26, 0.98), #0A0D0C 74%);
  border-top: 2px solid var(--panel-2);
  color: var(--gray);
  font-size: 14px;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--cyan), var(--volt) 38%, var(--orange) 72%, transparent);
}

.footer-wrap {
  width: min(var(--wrap), calc(100% - 40px));
  margin: 0 auto;
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 24px;
  margin-bottom: 24px;
  border-bottom: 2px solid var(--panel-2);
}
.footer-top__brand { min-width: 0; }

.footer-kicker {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--orange);
}
.footer-brand {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.15;
  color: var(--white);
  letter-spacing: 0.02em;
}
.footer-domain {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  word-break: break-all;
}
.footer-service {
  margin: 0;
  max-width: 46ch;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--gray);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 2px;
  background: var(--panel-2);
  border: 2px solid var(--panel-2);
}
.footer-col { background: #0B1F1A; padding: 22px 20px; }
.footer-col__label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--volt);
}
.footer-list { display: flex; flex-direction: column; gap: 9px; }

.footer-link {
  display: inline-block;
  color: var(--gray);
  font-size: 14px;
  line-height: 1.6;
  border-bottom: 2px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.footer-link:hover,
.footer-link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
  transform: translateX(3px);
}

.footer-list--meta { gap: 13px; }
.footer-meta__item { display: flex; flex-direction: column; gap: 3px; }
.footer-meta__key {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(143, 154, 149, 0.7);
}
.footer-meta__value {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--white);
  word-break: break-all;
}

.footer-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 2px solid var(--panel-2);
}
.footer-copy {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--gray);
}
.footer-strip__links { display: flex; flex-wrap: wrap; gap: 16px; }
.footer-strip__link {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--gray);
}
.footer-strip__link:hover,
.footer-strip__link:focus-visible { color: var(--volt); }
.footer-icp {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}
.footer-update {
  margin: 16px 0 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: rgba(143, 154, 149, 0.8);
}

/* ---------- 8. 基础布局组件 ---------- */
.wrap {
  width: min(var(--wrap), calc(100% - 40px));
  margin-inline: auto;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 30px 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray);
}
.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before { content: "/"; color: rgba(25, 247, 210, 0.35); }
.breadcrumb a { color: var(--gray); }
.breadcrumb a:hover { color: var(--cyan); }

/* ---------- 9. 面板与章节说明牌 ---------- */
.panel {
  position: relative;
  padding: 26px;
  background: var(--panel);
  border: 2px solid var(--panel-2);
  box-shadow: var(--hard);
}
.panel--flat { box-shadow: none; }
.panel--accent { border-color: var(--cyan); }
.panel--warm { border-color: var(--orange); box-shadow: var(--hard-warm); }
.panel + .panel { margin-top: 26px; }

.panel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 22px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  background: var(--volt);
  border: 2px solid var(--volt);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  line-height: 1.3;
}
.eyebrow--ghost { background: transparent; color: var(--cyan); border-color: var(--panel-2); }
.eyebrow--warm { background: var(--orange); border-color: var(--orange); color: #1A0A00; }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: 24px;
  border-bottom: 2px solid var(--panel-2);
}
.section-head h2 { margin: 0; }
.section-head__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

/* ---------- 10. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 12px 20px;
  background: transparent;
  border: 2px solid var(--cyan);
  color: var(--cyan);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.2;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.btn:hover,
.btn:focus-visible {
  color: #04241F;
  background: var(--cyan);
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 rgba(25, 247, 210, 0.3);
}
.btn--solid { background: var(--volt); border-color: var(--volt); color: #111A00; }
.btn--solid:hover,
.btn--solid:focus-visible { background: #F0FF7A; color: #111A00; box-shadow: 5px 5px 0 rgba(25, 247, 210, 0.35); }
.btn--warm { background: var(--orange); border-color: var(--orange); color: #180900; }
.btn--warm:hover,
.btn--warm:focus-visible { background: #FF8F3C; color: #180900; box-shadow: 5px 5px 0 rgba(230, 255, 59, 0.35); }

/* ---------- 11. 数字 / 标签 / 提示 ---------- */
.figure {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(38px, 6vw, 72px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--volt);
}
.figure--sm { font-size: clamp(24px, 3.4vw, 34px); }
.figure--cyan { color: var(--cyan); }
.figure--warm { color: var(--orange); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 2px solid var(--panel-2);
  color: var(--gray);
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  line-height: 1.4;
}
.tag--live { border-color: var(--orange); color: var(--orange); }
.tag--ok { border-color: var(--cyan); color: var(--cyan); }
.tag--warn { border-color: var(--red); color: var(--red); }

.field-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray);
}

.hint {
  position: relative;
  color: var(--cyan);
  border-bottom: 2px dotted rgba(25, 247, 210, 0.45);
  cursor: help;
}
.hint::after {
  content: attr(data-hint);
  position: absolute;
  left: 0;
  bottom: calc(100% + 8px);
  z-index: 30;
  min-width: 180px;
  max-width: min(320px, 80vw);
  padding: 9px 12px;
  background: var(--panel-2);
  border: 2px solid var(--cyan);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 12.5px;
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: 0;
  text-transform: none;
  opacity: 0;
  transform: translateY(4px);
  pointer-events: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.hint:hover::after,
.hint:focus-visible::after { opacity: 1; transform: translateY(0); }

/* ---------- 12. 图像容器（页面阶段放置 img / 内联 SVG） ---------- */
.media-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #081512;
  border: 2px solid var(--panel-2);
  box-shadow: var(--hard);
}
.media-frame > img,
.media-frame > svg,
.media-frame > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 26px 26px;
}
.media-frame--tall { aspect-ratio: 4 / 3; }
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }

.media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  padding: 6px 10px;
  background: var(--ink);
  border-top: 2px solid var(--cyan);
  border-right: 2px solid var(--cyan);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  line-height: 1.4;
}

/* ---------- 13. 统计卡 ---------- */
.stat-card {
  padding: 18px;
  background: var(--panel-2);
  border: 2px solid var(--hair-soft);
  box-shadow: var(--hard-dark);
}
.stat-card__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray);
}
.stat-card__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--volt);
}
.stat-card__note {
  margin: 8px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 14. 数据表 ---------- */
.data-table { width: 100%; font-size: 14px; }
.data-table th,
.data-table td {
  padding: 11px 14px;
  border-bottom: 2px solid var(--panel-2);
  text-align: left;
  vertical-align: top;
}
.data-table th {
  background: rgba(18, 53, 44, 0.6);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  white-space: nowrap;
}
.data-table td { color: var(--gray); }
.data-table td.num,
.data-table .num {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--volt);
  white-space: nowrap;
}
.data-table tbody tr:hover { background: rgba(25, 247, 210, 0.05); }

/* ---------- 15. 折叠面板 ---------- */
.fold {
  background: var(--panel);
  border: 2px solid var(--panel-2);
}
.fold + .fold { margin-top: 12px; }
.fold summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  color: var(--white);
  font-weight: 700;
  line-height: 1.5;
  cursor: pointer;
  list-style: none;
}
.fold summary::-webkit-details-marker { display: none; }
.fold summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--orange);
}
.fold[open] summary { border-bottom: 2px solid var(--panel-2); }
.fold[open] summary::after { content: "−"; }
.fold__body { padding: 16px 18px; color: var(--gray); font-size: 14.5px; line-height: 1.8; }

/* ---------- 16. 滚动显现 & 区块高亮 ---------- */
.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 340ms var(--ease), transform 340ms var(--ease);
}
.js-ready [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 17. 平板 ---------- */
@media (max-width: 1023px) {
  .site-header {
    position: sticky;
    top: 0;
    left: auto;
    right: auto;
    bottom: auto;
    width: 100%;
    height: auto;
    flex-direction: row;
    border-right: 0;
    border-bottom: 2px solid var(--panel-2);
    background: linear-gradient(180deg, #0B1F1A, #0A0D0C);
  }
  .site-header::before {
    -webkit-mask-image: none;
    mask-image: none;
    background-size: 24px 24px;
  }

  .rail {
    padding: 10px 14px;
    gap: 10px;
    height: auto;
    overflow: visible;
  }

  .rail-head {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
  }

  .brand { padding: 8px; box-shadow: none; }
  .brand__tag { width: 32px; height: 32px; font-size: 12px; }
  .brand__name { font-size: 14px; }
  .brand__sub { display: none; }

  .nav-toggle { display: inline-flex; }
  .rail-status { display: none; }
  .rail-foot { display: none; }

  .rail-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(86vw, 340px);
    padding: 78px 18px 28px;
    gap: 12px;
    overflow-y: auto;
    background: linear-gradient(180deg, #0B1F1A, #0A0D0C 85%);
    border-left: 2px solid var(--cyan);
    box-shadow: -14px 0 40px rgba(0, 0, 0, 0.6);
    transform: translateX(104%);
    transition: transform 240ms var(--ease);
    z-index: 86;
  }
  .site-header[data-open] .rail-nav { transform: translateX(0); }

  .rail-nav__label { padding-top: 0; }
  .rail-link { padding: 14px 12px; font-size: 16px; }
  .rail-link:hover { transform: none; }
  .rail-note { margin-top: 6px; }
  .rail-cta { margin-top: 14px; padding: 14px; font-size: 16px; }

  .rail-scrim {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 84;
    padding: 0;
    border: 0;
    background: rgba(6, 9, 8, 0.76);
    opacity: 0;
    pointer-events: none;
    transition: opacity 240ms var(--ease);
  }
  .site-header[data-open] .rail-scrim { opacity: 1; pointer-events: auto; }

  body.is-nav-open { overflow: hidden; }

  .read-progress { left: 0; }

  #main-content { scroll-margin-top: 76px; }

  .site-footer { margin-top: 56px; padding-top: 40px; }
  .footer-top { align-items: flex-start; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-strip { justify-content: flex-start; }
}

/* ---------- 18. 手机 ---------- */
@media (max-width: 639px) {
  body { font-size: 15.5px; }
  .wrap { width: calc(100% - 28px); }
  .footer-wrap { width: calc(100% - 28px); }

  .panel { padding: 20px 16px; box-shadow: 4px 4px 0 rgba(25, 247, 210, 0.24); }
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-col { padding: 18px 16px; }
  .footer-strip { flex-direction: column; align-items: flex-start; gap: 10px; }
  .footer-strip__links { gap: 14px; }
  .section-head { gap: 10px; }
  .data-table { font-size: 13px; }
  .data-table th,
  .data-table td { padding: 9px 10px; }
}

/* ---------- 19. 动效降级 ---------- */
@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;
  }
  .js-ready [data-reveal] { opacity: 1; transform: none; }
  .rail-cta:hover, .btn:hover, .rail-link:hover, .brand:hover { transform: none; }
}