/* ============================================================
   8868赛场 · 共享样式表 /assets/site.css
   夜场电子记分牌视觉系统：锐利直角、1px 精密网格、等宽数字
   ============================================================ */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 132px; }
body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, picture, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }
table { border-collapse: collapse; border-spacing: 0; }
hr { border: 0; border-top: 1px solid var(--line); margin: 0; }
[hidden] { display: none !important; }

/* ---------- 2. Tokens ---------- */
:root {
  --night: #0B1D33;
  --pitch: #0E2A22;
  --carbon: #060A0F;
  --lime: #C6FF3D;
  --lime-soft: rgba(198, 255, 61, 0.08);
  --cyan: #35E0C8;
  --alert: #FF5A36;
  --ink: #E8EEF2;
  --steel: #9AAAB5;
  --line: #1B2C3F;
  --ivory: #F4F7E8;

  --shell: 1280px;
  --gutter: clamp(16px, 4vw, 44px);
  --rail-h: 2px;

  --font-sans: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-display: "Arial Narrow", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;

  --t-fast: 140ms ease;
  --t-mid: 260ms ease;
}

/* ---------- 3. Base ---------- */
body {
  background: var(--night);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--ink);
}
h1 { font-size: clamp(34px, 5.4vw, 56px); }
h2 { font-size: clamp(24px, 3.4vw, 40px); }
h3 { font-size: clamp(20px, 2.4vw, 28px); }
h4 { font-size: 20px; }
::selection { background: var(--lime); color: var(--carbon); }

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

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.text-steel { color: var(--steel); }

/* ---------- 4. Skip link ---------- */
.skip-link {
  position: fixed;
  top: -72px; left: 12px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--lime);
  color: var(--carbon);
  font-size: 14px; font-weight: 700; letter-spacing: 0.06em;
  transition: top var(--t-fast);
}
.skip-link:focus { top: 12px; }

/* ---------- 5. Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: var(--carbon);
  border-bottom: 1px solid var(--line);
}
.progress-rail {
  position: absolute;
  inset: 0 0 auto 0;
  height: var(--rail-h);
  background: rgba(255, 255, 255, 0.06);
  overflow: hidden;
}
.progress-fill {
  display: block;
  height: 100%; width: 100%;
  background: linear-gradient(90deg, var(--lime), var(--cyan));
  transform: scaleX(var(--progress, 0));
  transform-origin: 0 50%;
  will-change: transform;
}
.header-utility {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.035), transparent);
}
.header-utility__inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
  min-height: 62px;
  padding-block: 10px;
}
.brand { display: flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.brand__mark {
  display: grid; place-items: center;
  width: 38px; height: 38px;
  padding-right: 9px;
  background: var(--lime);
  color: var(--carbon);
  font-family: var(--font-mono);
  font-size: 16px; font-weight: 700; letter-spacing: -0.06em;
  clip-path: polygon(0 0, 100% 0, calc(100% - 9px) 100%, 0 100%);
}
.brand__text { display: flex; flex-direction: column; line-height: 1.25; }
.brand__name {
  font-family: var(--font-display);
  font-size: 19px; font-weight: 800; letter-spacing: 0.02em;
  color: var(--ink);
}
.brand__tagline { font-size: 12px; letter-spacing: 0.08em; color: var(--steel); }

.header-status {
  display: flex; align-items: center; gap: 8px;
  padding-left: clamp(12px, 2vw, 26px);
  border-left: 1px solid var(--line);
  font-size: 13px; letter-spacing: 0.04em; color: var(--steel);
}
.status-dot {
  width: 8px; height: 8px;
  background: var(--lime);
  transform: rotate(45deg);
  animation: statusPulse 2.4s ease-in-out infinite;
}
@keyframes statusPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.25; }
}
.header-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.utility-link {
  font-size: 13px; letter-spacing: 0.08em; color: var(--steel);
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast), border-color var(--t-fast);
}
.utility-link:hover { color: var(--lime); border-bottom-color: var(--lime); }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 16px;
  font-size: 13px; font-weight: 700; letter-spacing: 0.1em; line-height: 1.2;
  border: 1px solid transparent; border-radius: 0;
  white-space: nowrap;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
}
.btn--solid { background: var(--lime); border-color: var(--lime); color: var(--carbon); }
.btn--solid:hover { background: #D9FF70; border-color: #D9FF70; }
.btn--ghost { background: rgba(255, 255, 255, 0.02); border-color: var(--line); color: var(--ink); }
.btn--ghost:hover { color: var(--lime); border-color: var(--lime); }
.btn--quiet { color: var(--steel); padding: 8px 10px; }
.btn--quiet:hover { color: var(--lime); }

/* mobile nav toggle */
.nav-toggle {
  display: none; align-items: center; gap: 10px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  color: var(--ink);
  font-size: 12px; letter-spacing: 0.12em;
  transition: color var(--t-fast), border-color var(--t-fast);
}
.nav-toggle__bars { display: flex; flex-direction: column; justify-content: space-between; width: 16px; height: 12px; }
.nav-toggle__bars i { display: block; width: 100%; height: 2px; background: currentColor; transition: transform var(--t-mid), opacity var(--t-mid); }
.nav-toggle__label { font-size: 12px; letter-spacing: 0.12em; }
.nav-toggle[aria-expanded="true"] { color: var(--lime); border-color: var(--lime); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1) { transform: translateY(5px) 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(-5px) rotate(-45deg); }

/* main nav */
.site-nav { background: var(--carbon); border-top: 1px solid var(--line); }
.site-nav__list {
  display: flex; align-items: stretch;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
  overflow-x: auto;
  scrollbar-width: none;
}
.site-nav__list::-webkit-scrollbar { display: none; }
.site-nav__item { flex: 0 0 auto; }
.site-nav__item + .site-nav__item .site-nav__link { border-left: 1px solid var(--line); }
.site-nav__link {
  display: block;
  padding: 15px 18px;
  font-size: 13px; letter-spacing: 0.12em;
  color: var(--steel);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color var(--t-fast), background var(--t-fast), border-color var(--t-fast);
}
.site-nav__link:hover { color: var(--ink); background: rgba(255, 255, 255, 0.04); }
.site-nav__link[aria-current="page"] {
  color: var(--lime);
  border-bottom-color: var(--lime);
  background: var(--lime-soft);
}

/* ---------- 6. Footer ---------- */
.site-footer { background: var(--carbon); border-top: 1px solid var(--line); color: var(--steel); }
.footer-stripe { display: flex; height: 4px; }
.footer-stripe span:first-child { width: clamp(88px, 22%, 260px); background: var(--lime); transform: skewX(-14deg); }
.footer-stripe span:last-child { flex: 1; background: var(--line); }

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: clamp(24px, 3vw, 44px);
  padding-block: clamp(36px, 6vw, 64px);
}
.footer-brand__name {
  font-family: var(--font-display);
  font-size: 22px; font-weight: 800; letter-spacing: 0.02em;
  color: var(--ink);
}
.footer-brand__note { margin-top: 12px; max-width: 34ch; font-size: 14px; line-height: 1.7; }
.footer-col__title {
  font-size: 12px; font-weight: 700; letter-spacing: 0.14em;
  color: var(--lime);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}
.footer-list { margin-top: 14px; display: grid; gap: 8px; }
.footer-list__item a {
  display: inline-block;
  font-size: 14px; color: var(--steel);
  transition: color var(--t-fast), transform var(--t-fast);
}
.footer-list__item a:hover { color: var(--lime); transform: translateX(3px); }

.footer-contact {
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: grid; gap: 10px;
}
.footer-contact__row { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px; font-size: 14px; }
.footer-contact__label { min-width: 70px; font-size: 12px; letter-spacing: 0.14em; color: var(--steel); }
.footer-contact__value { color: var(--ink); }
.footer-contact__value--mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: 0.02em; }
.footer-service { margin-top: 6px; max-width: 88ch; font-size: 13px; line-height: 1.7; color: var(--steel); }

.footer-bottom { border-top: 1px solid var(--line); }
.footer-bottom__inner {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 10px 24px;
  padding-block: 18px;
  font-size: 13px;
}
.footer-copy { color: var(--steel); }
.footer-icp { font-family: var(--font-mono); font-variant-numeric: tabular-nums; color: var(--steel); }

/* ---------- 7. Layout ---------- */
.shell { width: 100%; max-width: var(--shell); margin-inline: auto; padding-inline: var(--gutter); }

.section { position: relative; padding-block: clamp(40px, 6vw, 84px); }
.section--night { background: var(--night); }
.section--pitch { background: var(--pitch); }
.section--carbon { background: var(--carbon); }
.section + .section { border-top: 1px solid var(--line); }

.section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: clamp(14px, 2.4vw, 32px);
  padding-bottom: 18px;
  margin-bottom: clamp(22px, 3vw, 38px);
  border-bottom: 1px solid var(--line);
}
.section-head__body { display: grid; gap: 6px; }
.section-index {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700; line-height: 1;
  letter-spacing: -0.02em;
  color: var(--line);
  transition: color var(--t-mid);
}
.section-index.is-current,
[data-chapter].is-current .section-index { color: var(--lime); }
.eyebrow { font-size: 12px; letter-spacing: 0.14em; color: var(--lime); }

.grid { display: grid; gap: clamp(16px, 2.4vw, 28px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(180px, 3fr) minmax(0, 9fr); }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.stack { display: flex; flex-direction: column; gap: var(--stack, 16px); }
.stack--tight { --stack: 8px; }
.stack--loose { --stack: 28px; }

/* ---------- 8. Typography blocks ---------- */
.prose { max-width: 64ch; font-size: 17px; line-height: 1.75; color: var(--ink); }
.prose p + p { margin-top: 1em; }
.prose h3 { margin-top: 1.4em; }
.prose ul { margin-top: 1em; display: grid; gap: 0.5em; }
.prose li { position: relative; padding-left: 18px; }
.prose li::before { content: ""; position: absolute; left: 0; top: 0.78em; width: 8px; height: 1px; background: var(--lime); }
.prose a { color: var(--lime); border-bottom: 1px solid rgba(198, 255, 61, 0.4); }
.prose a:hover { border-bottom-color: var(--lime); }

.crumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 13px; color: var(--steel); }
.crumbs__item { display: inline-flex; align-items: center; gap: 8px; }
.crumbs__item:not(:last-child)::after { content: "/"; color: var(--line); }
.crumbs__link { color: var(--steel); transition: color var(--t-fast); }
.crumbs__link:hover { color: var(--lime); }
.crumbs__item[aria-current="page"] { color: var(--lime); }

.link-arrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px; font-weight: 700; letter-spacing: 0.06em;
  color: var(--lime);
}
.link-arrow::after { content: ""; width: 14px; height: 1px; background: currentColor; transition: width var(--t-fast); }
.link-arrow:hover::after { width: 24px; }

/* ---------- 9. Panels & data ---------- */
.panel {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line);
  padding: clamp(16px, 2.6vw, 28px);
}
.panel--accent { border-left: 2px solid var(--lime); }
.panel--ivory { background: var(--ivory); border-color: #CFD8BD; color: #12313F; }
.panel--ivory .panel__title { color: var(--night); }
.panel__title { font-family: var(--font-display); font-size: 20px; font-weight: 800; letter-spacing: 0.01em; color: var(--ink); }

.stat { padding-left: 14px; border-left: 2px solid var(--lime); }
.stat__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700; line-height: 1;
  color: var(--ink);
}
.stat__value--lime { color: var(--lime); }
.stat__value--alert { color: var(--alert); }
.stat__label { margin-top: 8px; font-size: 12px; letter-spacing: 0.12em; color: var(--steel); }

.score-pill {
  display: inline-flex; align-items: center; gap: 12px;
  padding: 8px 16px;
  background: var(--carbon);
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(18px, 2.4vw, 26px);
  font-weight: 700; letter-spacing: 0.02em;
  color: var(--lime);
}
.score-pill__sep { font-size: 0.66em; color: var(--steel); }

.data-strip {
  display: flex; gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  overflow-x: auto;
}
.data-strip__cell {
  flex: 1 0 auto;
  min-width: 132px;
  padding: 14px 16px;
  background: var(--carbon);
}

/* chips & tags */
.chip-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
  color: var(--steel);
  font-size: 12px; letter-spacing: 0.1em; line-height: 1.4;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
}
.chip:hover { color: var(--ink); border-color: var(--steel); }
.chip[aria-pressed="true"], .chip.is-active { background: var(--lime); border-color: var(--lime); color: var(--carbon); }
.chip--cyan[aria-pressed="true"] { background: var(--cyan); border-color: var(--cyan); color: var(--carbon); }
.chip--alert { color: var(--alert); border-color: rgba(255, 90, 54, 0.45); }
.chip--alert[aria-pressed="true"] { background: var(--alert); border-color: var(--alert); color: var(--carbon); }

.tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 8px;
  border: 1px solid var(--line);
  font-size: 12px; letter-spacing: 0.1em;
  color: var(--steel);
}
.tag--lime { color: var(--lime); border-color: rgba(198, 255, 61, 0.4); }
.tag--alert { color: var(--alert); border-color: rgba(255, 90, 54, 0.45); }

/* ---------- 10. Tables ---------- */
.table-scroll { overflow-x: auto; border: 1px solid var(--line); background: var(--carbon); }
.data-table { width: 100%; min-width: 560px; font-size: 14px; font-variant-numeric: tabular-nums; }
.data-table caption {
  padding: 14px 16px;
  text-align: left;
  font-size: 12px; letter-spacing: 0.12em; color: var(--steel);
  border-bottom: 1px solid var(--line);
}
.data-table th {
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--line);
  font-size: 12px; font-weight: 700; letter-spacing: 0.12em;
  color: var(--steel);
  text-align: left;
  white-space: nowrap;
}
.data-table td { padding: 12px 16px; border-bottom: 1px solid rgba(27, 44, 63, 0.6); color: var(--ink); }
.data-table .num { text-align: right; font-family: var(--font-mono); }
.data-table tbody tr:nth-child(even) { background: rgba(255, 255, 255, 0.02); }
.data-table tbody tr:hover { background: var(--lime-soft); }
.data-table tbody td:first-child { box-shadow: inset 3px 0 0 transparent; transition: box-shadow var(--t-fast); }
.data-table tbody tr:hover td:first-child { box-shadow: inset 3px 0 0 var(--lime); }
.data-table .is-up { color: var(--cyan); }
.data-table .is-warn { color: var(--alert); }
.data-table .is-highlight { background: rgba(198, 255, 61, 0.12); color: var(--lime); }
.data-table tfoot td { font-size: 13px; color: var(--steel); }

[data-chapter-link].is-current { color: var(--lime); }

/* ---------- 11. Media frames ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background-color: var(--pitch);
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 100% 32px, 32px 100%;
}
.media-frame > img,
.media-frame > picture > img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.05);
}
.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame__tag {
  position: absolute; top: 0; left: 0;
  padding: 5px 10px;
  background: var(--carbon);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-size: 12px; letter-spacing: 0.12em;
  color: var(--lime);
}
.media-frame__caption {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 10px 14px;
  background: linear-gradient(180deg, rgba(6, 10, 15, 0), rgba(6, 10, 15, 0.88));
  font-size: 12px; letter-spacing: 0.08em;
  color: var(--ink);
}

/* ---------- 12. Responsive ---------- */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 960px) {
  html { scroll-padding-top: 112px; }
  .header-status { display: none; }
  .utility-link { display: none; }
  .btn--ghost { display: none; }
  .nav-toggle { display: inline-flex; margin-left: auto; }

  .site-nav { display: none; }
  .site-nav[data-open] { display: block; }
  .site-nav__list { flex-direction: column; align-items: stretch; overflow: visible; }
  .site-nav__item { border-bottom: 1px solid var(--line); }
  .site-nav__item + .site-nav__item .site-nav__link { border-left: 0; }
  .site-nav__link {
    padding: 14px 12px;
    border-bottom: 0;
    border-left: 2px solid transparent;
  }
  .site-nav__link[aria-current="page"] { border-left-color: var(--lime); border-bottom-color: transparent; }

  .grid--2, .grid--3, .grid--split { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 700px) {
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .section-head { grid-template-columns: auto minmax(0, 1fr); gap: 14px; }
  .media-frame--wide { aspect-ratio: 16 / 9; }
}
@media (max-width: 560px) {
  .brand__tagline { display: none; }
  .header-actions { display: none; }
  .footer-bottom__inner { justify-content: flex-start; }
}

/* ---------- 13. Motion preferences ---------- */
@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;
  }
  .progress-fill { transition: none; }
}