/* ==========================================================================
   UED赛事 · 共享样式 /assets/site.css
   夜场墨蓝底 + 看台深蓝面 + 荧光青信号 + 橙红胜负 + 精密 1px 网格
   ========================================================================== */

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

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

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

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

img, svg, video, canvas { 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; }

hr { border: 0; border-top: 1px solid var(--line); }

table { border-collapse: collapse; width: 100%; }

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

::selection { background: var(--cyan); color: var(--brown); }

[id] { scroll-margin-top: 96px; }

/* ---------- 2. Tokens ---------- */
:root {
  /* 品牌色板 */
  --ink-900: #0A1A2A;   /* 夜场墨蓝 */
  --ink-800: #102A43;   /* 看台深蓝 */
  --cyan:    #00E0C6;   /* 荧光青 */
  --signal:  #FF4A21;   /* 信号橙红 */
  --signal-ink: #A82C0D;/* 橙红在浅底上的可读版本 */
  --cream:   #F3EADB;   /* 奶油纸 */
  --brown:   #14100E;   /* 深棕黑 */
  --slate:   #7C99AC;   /* 数据灰青 */
  --gold:    #E2A65A;   /* 暖金 */
  --cold:    #E9F6F3;   /* 冷白 */

  /* 语义 */
  --bg: var(--ink-900);
  --surface: var(--ink-800);
  --line: rgba(124, 153, 172, .30);
  --line-soft: rgba(124, 153, 172, .16);
  --line-strong: rgba(0, 224, 198, .42);

  /* 字体 */
  --font-display: "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC",
                  "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "PingFang SC", "HarmonyOS Sans SC", "Noto Sans SC",
               "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular,
               Menlo, Consolas, "Courier New", monospace;
  --font-serif: "Songti SC", "Source Han Serif SC", "Noto Serif SC",
                Georgia, "Times New Roman", serif;

  /* 度量 */
  --gutter: clamp(18px, 4vw, 40px);
  --maxw: 1280px;
  --step: clamp(34px, 6vw, 76px);
  --ease: cubic-bezier(.2, .7, .2, 1);
}

/* ---------- 3. Base ---------- */
body {
  background: var(--bg);
  color: var(--cream);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

#main-content {
  display: block;
  position: relative;
  z-index: 10;
}

/* ---------- 4. Layout ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section {
  padding: var(--step) 0;
  border-top: 1px solid var(--line);
}

.section--flush { border-top: 0; }

.section--paper {
  background: var(--cream);
  color: var(--brown);
  border-top: 1px solid var(--brown);
  border-bottom: 1px solid var(--brown);
}

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 18px;
  margin-bottom: clamp(16px, 2.4vw, 28px);
}

.section__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.section--paper .section__num { color: var(--signal-ink); }

.rule-band {
  display: block;
  width: 100%;
  height: 3px;
  border: 0;
  background: linear-gradient(90deg,
    var(--cyan) 0 26%,
    var(--signal) 26% 40%,
    var(--gold) 40% 50%,
    rgba(124, 153, 172, .55) 50% 100%);
}

.grid { display: grid; gap: clamp(14px, 2vw, 24px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--rail { grid-template-columns: minmax(0, 1fr) minmax(240px, 320px); }

/* ---------- 5. Typography ---------- */
.h-display {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.125rem, 6vw, 4.5rem);
  line-height: 1.08;
  letter-spacing: -0.5px;
  color: var(--cold);
}

.h-1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.75rem, 3.4vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.4px;
  color: var(--cold);
}

.h-2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.25rem, 2vw, 1.6rem);
  line-height: 1.25;
  letter-spacing: -0.2px;
  color: var(--cold);
}

.h-3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.08rem;
  line-height: 1.4;
  color: var(--cold);
}

.section--paper .h-1,
.section--paper .h-2,
.section--paper .h-3,
.section--paper .h-display { color: var(--brown); }

.eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.lede {
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  line-height: 1.7;
  color: var(--cold);
  max-width: 42em;
}

.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

.label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  letter-spacing: .08em;
  padding: 5px 8px;
  border: 1px solid var(--line);
  color: var(--slate);
  white-space: nowrap;
}
.label--cyan { color: var(--cyan); border-color: var(--cyan); }
.label--signal { color: var(--signal); border-color: var(--signal); }
.label--gold { color: var(--gold); border-color: var(--gold); }

.aside-note {
  font-size: 13px;
  line-height: 1.75;
  color: var(--slate);
  border-left: 1px solid var(--line-strong);
  padding-left: 14px;
}

/* ---------- 6. Prose ---------- */
.prose {
  max-width: 42em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--cream);
}
.prose p + p { margin-top: 1em; }
.prose h2 { font-family: var(--font-display); font-weight: 800; font-size: 1.35rem; line-height: 1.3; color: var(--cold); margin: 1.6em 0 .6em; }
.prose h3 { font-family: var(--font-display); font-weight: 700; font-size: 1.08rem; color: var(--cold); margin: 1.4em 0 .5em; }
.prose ul, .prose ol { display: grid; gap: 8px; margin: 1em 0; }
.prose li { position: relative; padding-left: 18px; }
.prose li::before {
  content: "";
  position: absolute;
  left: 0; top: .78em;
  width: 9px; height: 1px;
  background: var(--cyan);
}
.prose blockquote {
  border-left: 2px solid var(--cyan);
  padding: 4px 0 4px 16px;
  color: var(--cold);
  font-family: var(--font-serif);
}
.prose a { color: var(--cyan); border-bottom: 1px solid rgba(0, 224, 198, .45); }
.prose a:hover { border-bottom-color: var(--cyan); }
.prose code { font-family: var(--font-mono); font-size: .92em; color: var(--cyan); }

.prose--paper {
  background: var(--cream);
  color: var(--brown);
  border: 1px solid var(--brown);
  padding: clamp(20px, 4vw, 42px);
  max-width: none;
}
.prose--paper h2, .prose--paper h3 { color: var(--brown); }
.prose--paper li::before { background: var(--signal-ink); }
.prose--paper a { color: var(--signal-ink); border-bottom-color: rgba(168, 44, 13, .5); }
.prose--paper code { color: var(--signal-ink); }

/* ---------- 7. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--cold);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: .02em;
  text-align: center;
  white-space: nowrap;
  transition: background-color .18s var(--ease), color .18s var(--ease),
              border-color .18s var(--ease);
}
.btn:hover { border-color: var(--cyan); color: var(--cyan); }

.btn--signal {
  background: var(--signal);
  border-color: var(--signal);
  color: #FFF4F0;
}
.btn--signal:hover { background: #FF6A45; border-color: #FF6A45; color: var(--brown); }

.btn--cyan {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--brown);
}
.btn--cyan:hover { background: #5CF3DF; border-color: #5CF3DF; color: var(--brown); }

.btn--compact { min-height: 34px; padding: 0 12px; font-size: 13px; }
.btn--lg { min-height: 46px; padding: 0 20px; font-size: 15px; }
.btn--block { width: 100%; }

/* ---------- 8. Filter ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.filter {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--slate);
  font-size: 13px;
  font-weight: 600;
  line-height: 1;
  transition: color .18s var(--ease), border-color .18s var(--ease),
              background-color .18s var(--ease);
}
.filter:hover { color: var(--cold); border-color: var(--line-strong); }
.filter[aria-pressed="true"] {
  color: var(--brown);
  background: var(--cyan);
  border-color: var(--cyan);
}

[data-filter-item][hidden] { display: none !important; }

/* ---------- 9. Cards ---------- */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  padding: clamp(14px, 2vw, 22px);
  transition: border-color .18s var(--ease), background-color .18s var(--ease);
}
.card:hover { border-color: var(--line-strong); }

.card--cut {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px),
                     calc(100% - 20px) 100%, 0 100%);
}

.card__kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--slate);
}
.card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  line-height: 1.4;
  color: var(--cold);
}
.card__value {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}
.card__value--signal { color: var(--signal); }
.card__meta { font-size: 13px; color: var(--slate); }

/* ---------- 10. Media frames ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--ink-800);
  border: 1px solid var(--line);
  overflow: hidden;
}
.media-frame img,
.media-frame video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 4 / 5; }

.media-frame--grid::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .32;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 40px 40px;
}

.media-frame__caption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 8px 10px;
  background: rgba(10, 26, 42, .88);
  border-top: 1px solid var(--line-strong);
  color: var(--cold);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
}

/* ---------- 11. Breadcrumbs ---------- */
.crumbs {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--slate);
}
.crumbs__item { display: inline-flex; align-items: center; gap: 8px; }
.crumbs__link { color: var(--slate); border-bottom: 1px solid transparent; }
.crumbs__link:hover { color: var(--cyan); border-bottom-color: var(--cyan); }
.crumbs__sep { color: rgba(124, 153, 172, .55); }
.crumbs__current { color: var(--cold); }

/* ---------- 12. Skip link ---------- */
.skip-link {
  position: absolute;
  left: 12px;
  top: -120px;
  z-index: 300;
  padding: 10px 16px;
  background: var(--cyan);
  color: var(--brown);
  font-size: 14px;
  font-weight: 700;
  transition: top .16s var(--ease);
}
.skip-link:focus { top: 12px; }

/* ---------- 13. Page frame ---------- */
.frame {
  position: fixed;
  inset: 0;
  z-index: 5;
  pointer-events: none;
  display: none;
}
.frame__edge {
  position: absolute;
  top: 0; bottom: 0;
  width: 1px;
  background: var(--line);
}
.frame__edge--left { left: max(12px, calc(50% - 640px)); }
.frame__edge--right { right: max(12px, calc(50% - 640px)); }

@media (min-width: 720px) {
  .frame { display: block; }
}

/* ---------- 14. Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--ink-900);
  border-bottom: 1px solid var(--line-strong);
}

.site-header__inner {
  position: relative;
  display: flex;
  align-items: stretch;
  gap: clamp(12px, 1.6vw, 28px);
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
  min-height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-right: clamp(8px, 1.6vw, 22px);
  border-right: 1px solid var(--line);
}

.brand__mark {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  line-height: 1;
  letter-spacing: .12em;
  padding: 6px 7px;
  background: var(--cyan);
  color: var(--brown);
}

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

.brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.1;
  letter-spacing: -0.2px;
  color: var(--cold);
}

.brand__tagline {
  font-family: var(--font-serif);
  font-size: 11px;
  line-height: 1.2;
  letter-spacing: .08em;
  color: var(--slate);
  white-space: nowrap;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: stretch;
}

.site-nav__list {
  counter-reset: nav-item;
  display: flex;
  align-items: stretch;
}

.site-nav__item {
  counter-increment: nav-item;
  display: flex;
  align-items: stretch;
}

.site-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: .45em;
  padding: 0 clamp(8px, 1.1vw, 15px);
  border-left: 1px solid var(--line);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--cream);
  white-space: nowrap;
  transition: color .18s var(--ease), background-color .18s var(--ease);
}

.site-nav__link::before {
  content: counter(nav-item, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .06em;
  color: var(--slate);
  transition: color .18s var(--ease);
}

.site-nav__link:hover { color: var(--cyan); background: rgba(0, 224, 198, .06); }
.site-nav__link:hover::before { color: var(--cyan); }

.site-nav__link[aria-current="page"] {
  color: var(--cyan);
  background: rgba(0, 224, 198, .09);
}
.site-nav__link[aria-current="page"]::before { color: var(--cyan); }
.site-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  background: var(--cyan);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: clamp(8px, 1.4vw, 20px);
  padding-left: clamp(8px, 1.4vw, 20px);
  border-left: 1px solid var(--line);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line-strong);
  color: var(--cold);
  font-size: 13px;
  font-weight: 600;
  line-height: 1;
}
.nav-toggle:hover { color: var(--cyan); }

.nav-toggle__bars { position: relative; display: block; width: 16px; height: 11px; }
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 1.5px;
  background: var(--cyan);
  transition: transform .18s var(--ease);
}
.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  transform: translateY(4.75px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  transform: translateY(-4.75px) rotate(-45deg);
}

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

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform .12s linear;
  pointer-events: none;
}

.site-header[data-open] { border-bottom-color: var(--cyan); }

/* 头部断点：1200px 以下切档案抽屉 */
@media (max-width: 1200px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    margin: 0;
    padding: 4px 0 10px;
    background: var(--ink-800);
    border-top: 1px solid var(--line-strong);
    border-bottom: 1px solid var(--line-strong);
    max-height: calc(100vh - 72px);
    overflow-y: auto;
  }

  .site-nav[data-open] { display: block; }

  .site-nav__list {
    counter-reset: nav-item;
    flex-direction: column;
    align-items: stretch;
  }

  .site-nav__item {
    display: block;
    border-bottom: 1px solid var(--line-soft);
  }
  .site-nav__item:last-child { border-bottom: 0; }

  .site-nav__link {
    padding: 15px var(--gutter);
    border-left: 0;
    font-size: 15px;
  }

  .site-nav__link[aria-current="page"]::after {
    left: 0; right: 0; bottom: -1px;
    height: 2px;
  }
}

@media (max-width: 640px) {
  .site-header__inner { min-height: 64px; }
  .brand__tagline { display: none; }
  .site-header__actions .btn--ghost { display: none; }
}

/* ---------- 15. Footer ---------- */
.site-footer {
  position: relative;
  z-index: 10;
  margin-top: clamp(40px, 7vw, 90px);
  background: var(--ink-800);
  border-top: 1px solid var(--line-strong);
  color: var(--cream);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: clamp(20px, 3vw, 40px);
  padding: clamp(30px, 5vw, 56px) 0 clamp(18px, 3vw, 30px);
}

.site-footer__col { min-width: 0; }

.site-footer__brand {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 22px;
  line-height: 1.15;
  letter-spacing: -0.2px;
  color: var(--cold);
}

.site-footer__slogan {
  margin-top: 6px;
  font-family: var(--font-serif);
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--gold);
}

.site-footer__note {
  margin-top: 12px;
  max-width: 26em;
  font-size: 13px;
  line-height: 1.75;
  color: var(--slate);
}

.site-footer__title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--slate);
}

.site-footer__num { color: var(--cyan); }

.site-footer__list { display: grid; gap: 9px; font-size: 14px; }

.site-footer__link {
  color: var(--cream);
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.site-footer__link:hover { color: var(--cyan); border-bottom-color: var(--cyan); }

.site-footer__key {
  display: inline-block;
  min-width: 3.4em;
  margin-right: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--slate);
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding: 16px 0 24px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--slate);
}

.site-footer__legal { display: flex; flex-wrap: wrap; gap: 18px; }
.site-footer__legal a { color: var(--slate); border-bottom: 1px solid transparent; }
.site-footer__legal a:hover { color: var(--cyan); border-bottom-color: var(--cyan); }

.site-footer__icp {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--slate);
}

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

@media (max-width: 560px) {
  .site-footer__grid { grid-template-columns: minmax(0, 1fr); gap: 26px; }
  .site-footer__bottom { flex-direction: column; align-items: flex-start; }
}

/* ---------- 16. 通用网格降列 ---------- */
@media (max-width: 1024px) {
  .grid--rail { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 900px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 600px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 17. Reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
  transition: opacity .5s var(--ease), transform .5s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}

/* ---------- 18. Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

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