/* ============================================================
   全站看台 · shared site kit
   /assets/site.css
   ============================================================ */

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

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

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

ul, ol { list-style: none; }

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

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

button, input, textarea, select { font: inherit; color: inherit; }

button { background: none; border: 0; cursor: pointer; }

/* ---------- tokens ---------- */
:root {
  --ink: #0B0F0E;
  --pine: #0F2E23;
  --orange: #FF6A2B;
  --ember: #C84512;
  --lemon: #D8FF3E;
  --steel: #7E93A6;
  --paper: #F5F1E8;
  --mist: #A9B0AA;
  --hair: #2A3330;

  --ink-soft: #131917;
  --pine-soft: #14382B;

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

  --wrap: 1200px;
  --wrap-wide: 1320px;
  --wrap-narrow: 780px;

  --bar-h: 68px;
  --rail-h: 34px;

  --line: 1px;
  --radius: 4px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur: 200ms;

  --shadow-s: 0 1px 0 rgba(245, 241, 232, 0.04), 0 10px 30px rgba(0, 0, 0, 0.35);
}

/* ---------- base ---------- */
html { scroll-behavior: smooth; }

body {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

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

a, button { transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), opacity var(--dur) var(--ease); }

/* skip link */
.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 999;
  padding: 12px 20px;
  background: var(--lemon);
  color: var(--ink);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.06em;
  transform: translateY(-120%);
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus-visible,
.skip-link:focus {
  transform: translateY(0);
}

/* ---------- layout containers ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: 24px;
}
.wrap--wide { max-width: var(--wrap-wide); }
.wrap--narrow { max-width: var(--wrap-narrow); }

main { display: block; }

/* ---------- typography helpers ---------- */
.eyebrow {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange);
}

.display {
  font-family: var(--font-sans);
  font-weight: 900;
  letter-spacing: 0.04em;
  line-height: 1.04;
  font-size: clamp(2.6rem, 8vw, 6.5rem);
  color: var(--paper);
}

.subhead {
  font-weight: 700;
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  letter-spacing: 0.02em;
  line-height: 1.3;
}

.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: 0.02em; }

/* ============================================================
   HEADER — 比赛日命令栏
   ============================================================ */
.cmd-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 15, 14, 0.94);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: var(--line) solid var(--hair);
}

.cmd-bar__inner {
  display: flex;
  align-items: center;
  gap: 20px;
  width: 100%;
  max-width: var(--wrap-wide);
  margin-inline: auto;
  padding-inline: 24px;
  min-height: var(--bar-h);
}

/* brand */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  padding-block: 8px;
}
.brand__mark {
  width: 12px;
  height: 12px;
  background: var(--lemon);
  box-shadow: 0 0 0 4px rgba(216, 255, 62, 0.12);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.brand:hover .brand__mark,
.brand:focus-visible .brand__mark {
  transform: rotate(45deg) scale(1.25);
  box-shadow: 0 0 0 5px rgba(255, 106, 43, 0.22);
}
.brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand__name {
  font-weight: 900;
  font-size: 19px;
  letter-spacing: 0.12em;
  color: var(--paper);
}
.brand__tagline {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--mist);
  margin-top: 2px;
}

/* nav */
.cmd-nav { flex: 1 1 auto; min-width: 0; }
.cmd-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: wrap;
  justify-content: center;
}
.cmd-nav__item { position: relative; }
.cmd-nav__item > a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 9px 11px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--mist);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}
.cmd-nav__index {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--steel);
  transition: color var(--dur) var(--ease);
}
.cmd-nav__item > a:hover,
.cmd-nav__item > a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--ember);
}
.cmd-nav__item > a:hover .cmd-nav__index,
.cmd-nav__item > a:focus-visible .cmd-nav__index { color: var(--orange); }

.cmd-nav__item > a[aria-current="page"] {
  color: var(--paper);
  border-bottom-color: var(--orange);
}
.cmd-nav__item > a[aria-current="page"] .cmd-nav__index {
  color: var(--lemon);
  position: relative;
}
.cmd-nav__item > a[aria-current="page"] .cmd-nav__index::before {
  content: "";
  position: absolute;
  left: -1px;
  top: -6px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--lemon);
}

/* side */
.cmd-bar__side {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 0 0 auto;
}

.cmd-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mist);
  white-space: nowrap;
}
.cmd-status__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lemon);
  box-shadow: 0 0 0 0 rgba(216, 255, 62, 0.5);
  animation: pulse 2.4s var(--ease) infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(216, 255, 62, 0.45); }
  70%  { box-shadow: 0 0 0 7px rgba(216, 255, 62, 0); }
  100% { box-shadow: 0 0 0 0 rgba(216, 255, 62, 0); }
}

/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  border: var(--line) solid transparent;
  border-radius: var(--radius);
  line-height: 1.2;
  text-align: center;
}
.btn--primary {
  background: var(--orange);
  color: var(--ink);
  border-color: var(--orange);
}
.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--ember);
  border-color: var(--ember);
  color: var(--paper);
}
.btn--ghost {
  background: transparent;
  color: var(--paper);
  border-color: var(--hair);
}
.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--orange);
  color: var(--orange);
  background: rgba(255, 106, 43, 0.06);
}
.btn--small { padding: 9px 16px; font-size: 12.5px; letter-spacing: 0.05em; }

/* nav toggle */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: var(--line) solid var(--hair);
  border-radius: var(--radius);
  color: var(--paper);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
}
.nav-toggle__bars {
  position: relative;
  width: 16px;
  height: 2px;
  background: currentColor;
  display: block;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-5px) rotate(-45deg); }
.nav-toggle[aria-expanded="true"] { border-color: var(--orange); color: var(--orange); }

/* breadcrumb rail */
.crumb-rail {
  border-top: var(--line) solid var(--hair);
  background: var(--pine);
}
.crumb-rail__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--wrap-wide);
  margin-inline: auto;
  padding: 0 24px;
  min-height: var(--rail-h);
}
.crumb {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--mist);
  min-width: 0;
}
.crumb__now { color: var(--steel); }
.crumb__sep { color: var(--hair); }
.crumb__here { color: var(--lemon); font-family: var(--font-mono); letter-spacing: 0.04em; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.crumb-rail__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--steel);
  white-space: nowrap;
}

/* scroll progress */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 200;
  height: 3px;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--orange), var(--lemon));
  pointer-events: none;
}

/* ============================================================
   SHARED COMPONENTS
   ============================================================ */

/* section band */
.section-band {
  position: relative;
  background: var(--pine);
  border-top: var(--line) solid var(--lemon);
  padding-block: 64px;
}
.section-band--ink { background: var(--ink-soft); border-top-color: var(--hair); }
.section-band--paper { background: var(--paper); color: var(--ink); border-top-color: var(--orange); }
.section-band--paper .eyebrow { color: var(--ember); }

/* grid */
.grid {
  display: grid;
  gap: 28px;
}
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--offset { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 48px; }

/* tags */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  border-radius: 2px;
  border: var(--line) solid currentColor;
  line-height: 1.6;
  white-space: nowrap;
}
.tag--new { color: var(--orange); background: rgba(255, 106, 43, 0.1); }
.tag--legacy { color: var(--steel); background: rgba(126, 147, 166, 0.1); }
.tag--data {
  color: var(--ink);
  background: var(--lemon);
  border-color: var(--lemon);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

/* data strip */
.data-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border: var(--line) solid var(--hair);
  background: var(--ink-soft);
}
.data-strip__item {
  flex: 1 1 160px;
  padding: 16px 20px;
  border-right: var(--line) solid var(--hair);
  min-width: 0;
}
.data-strip__item:last-child { border-right: 0; }
.data-strip__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 500;
  color: var(--lemon);
  letter-spacing: 0.02em;
  line-height: 1.2;
}
.data-strip__label {
  display: block;
  margin-top: 4px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--mist);
}

/* index list */
.index-list { border-top: var(--line) solid var(--hair); }
.index-list__row {
  display: grid;
  grid-template-columns: minmax(120px, 200px) minmax(0, 1fr);
  gap: 24px;
  padding: 18px 0;
  border-bottom: var(--line) solid var(--hair);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.index-list__row:hover { border-bottom-color: var(--orange); }
.index-list__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--steel);
}
.index-list__body { font-size: 16px; color: var(--paper); }

/* media frames */
.media-frame {
  position: relative;
  overflow: hidden;
  background: var(--pine-soft);
  border: var(--line) solid var(--hair);
  border-radius: var(--radius);
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-s);
}
.media-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  padding: 10px 14px;
  background: linear-gradient(180deg, rgba(11,15,14,0) 0%, rgba(11,15,14,0.88) 100%);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mist);
}
.media-frame--empty::after {
  content: attr(data-placeholder);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--steel);
  text-align: center;
  padding: 12px;
}

/* toc */
.toc {
  position: sticky;
  top: calc(var(--bar-h) + var(--rail-h) + 20px);
  border-left: var(--line) solid var(--hair);
  padding-left: 16px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.toc__link {
  display: block;
  padding: 6px 0;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--steel);
  border-bottom: var(--line) solid transparent;
}
.toc__link:hover,
.toc__link:focus-visible { color: var(--paper); }
.toc__link[aria-current="true"] {
  color: var(--lemon);
}
.toc__link[aria-current="true"]::before {
  content: "▍";
  color: var(--orange);
  margin-right: 4px;
}

/* to top */
.to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 90;
  padding: 10px 16px;
  background: var(--pine);
  color: var(--paper);
  border: var(--line) solid var(--hair);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.to-top[data-visible="true"] { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover,
.to-top:focus-visible { border-color: var(--orange); color: var(--orange); }

/* ============================================================
   FOOTER — 看台下层通道
   ============================================================ */
.site-foot {
  position: relative;
  margin-top: 96px;
  background: var(--pine);
  border-top: var(--line) solid var(--hair);
  padding-block: 56px 32px;
  overflow: hidden;
}
.site-foot__glow {
  position: absolute;
  inset-inline: -20%;
  top: -160px;
  height: 320px;
  background: radial-gradient(ellipse at 50% 100%, rgba(255, 106, 43, 0.22), rgba(255, 106, 43, 0) 68%);
  pointer-events: none;
}
.foot-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 28px;
  border-bottom: var(--line) solid var(--hair);
  position: relative;
}
.foot-top__eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--lemon);
  font-family: var(--font-mono);
}
.foot-top__wordmark {
  font-weight: 900;
  font-size: clamp(2.6rem, 9vw, 6.5rem);
  letter-spacing: 0.06em;
  line-height: 0.9;
  color: transparent;
  -webkit-text-stroke: 1px var(--hair);
  text-stroke: 1px var(--hair);
  user-select: none;
}
.foot-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 36px 32px;
  padding-block: 40px;
}
.foot-col__title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--orange);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: var(--line) solid var(--hair);
}
.foot-links { display: flex; flex-direction: column; gap: 8px; }
.foot-links a {
  display: inline-block;
  font-size: 14.5px;
  color: var(--mist);
  border-bottom: var(--line) solid transparent;
  padding-bottom: 1px;
}
.foot-links a:hover,
.foot-links a:focus-visible { color: var(--paper); border-bottom-color: var(--orange); }

.foot-contact { display: flex; flex-direction: column; gap: 7px; }
.foot-contact__row {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 10px;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--paper);
  word-break: break-word;
}
.foot-contact__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--steel);
  padding-top: 2px;
}
.foot-contact a { border-bottom: var(--line) solid transparent; }
.foot-contact a:hover,
.foot-contact a:focus-visible { color: var(--lemon); border-bottom-color: var(--lemon); }

.foot-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 24px;
  padding-top: 24px;
  border-top: var(--line) solid var(--hair);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--steel);
}
.foot-legal__icp { color: var(--mist); }
.foot-note { color: var(--steel); margin-left: auto; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1100px) {
  .cmd-bar__inner { gap: 14px; }
  .cmd-nav__item > a { padding-inline: 8px; font-size: 13px; }
  .cmd-nav__index { display: none; }
  .cmd-status__text { display: none; }
}

@media (max-width: 960px) {
  .foot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--offset { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .toc { position: static; flex-direction: row; flex-wrap: wrap; border-left: 0; border-top: var(--line) solid var(--hair); padding: 12px 0 0; gap: 0 18px; }
}

@media (max-width: 860px) {
  :root { --bar-h: 60px; }

  .cmd-bar__inner { flex-wrap: wrap; padding-block: 10px; gap: 10px; }

  .cmd-bar__side { margin-left: auto; order: 2; }
  .nav-toggle { display: inline-flex; order: 3; }

  .cmd-nav {
    order: 4;
    flex: 1 1 100%;
    width: 100%;
    display: none;
    border-top: var(--line) solid var(--hair);
    padding-top: 8px;
    margin-top: 4px;
  }
  .cmd-nav[data-open="true"] { display: block; }
  .cmd-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .cmd-nav__item > a {
    display: flex;
    justify-content: space-between;
    padding: 13px 4px;
    border-bottom: var(--line) solid var(--hair);
    border-left: 2px solid transparent;
    font-size: 15px;
  }
  .cmd-nav__index { display: inline; }
  .cmd-nav__item > a[aria-current="page"] {
    border-bottom-color: var(--hair);
    border-left-color: var(--orange);
    padding-left: 12px;
    background: rgba(255, 106, 43, 0.07);
  }
  .cmd-nav__item > a[aria-current="page"] .cmd-nav__index::before { display: none; }

  .cmd-status { display: none; }

  .crumb-rail__meta { display: none; }

  .section-band { padding-block: 44px; }
  .site-foot { margin-top: 64px; }
  .foot-top { flex-direction: column; align-items: flex-start; gap: 12px; }
  .foot-top__wordmark { font-size: clamp(2.2rem, 14vw, 4rem); }
  .foot-note { margin-left: 0; flex-basis: 100%; }
}

@media (max-width: 620px) {
  body { font-size: 16px; }
  .wrap, .wrap--wide, .wrap--narrow, .cmd-bar__inner, .crumb-rail__inner { padding-inline: 18px; }
  .grid--2, .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .foot-grid { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .index-list__row { grid-template-columns: minmax(0, 1fr); gap: 6px; }
  .data-strip__item { flex-basis: 50%; border-right: 0; border-bottom: var(--line) solid var(--hair); }
  .data-strip__item:nth-child(odd) { border-right: var(--line) solid var(--hair); }
  .btn--small { padding: 8px 12px; }
  .brand__tagline { display: none; }
}

@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;
    scroll-behavior: auto !important;
  }
  .cmd-status__dot { animation: none; box-shadow: 0 0 0 3px rgba(216, 255, 62, 0.18); }
  .to-top { transform: none; }
}