/* =========================================================
   谈球吧赛场 · 共享样式表  /assets/site.css
   夜场墨绿底 + 荧光青勾线 + 暖橙点亮
   ========================================================= */

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

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

body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { max-width: 100%; display: block; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; }
table { border-collapse: collapse; }

/* ---------- tokens ---------- */
:root {
  --c-ink: #08211B;
  --c-board: #0F3A2F;
  --c-grid: #1C5548;
  --c-cyan: #31E1C4;
  --c-orange: #FF8A3C;
  --c-paper: #F2F6F4;
  --c-mist: #9FB5AE;
  --c-deep: #05100D;

  --c-line: rgba(28, 85, 72, 0.9);
  --c-line-soft: rgba(28, 85, 72, 0.5);
  --c-cyan-soft: rgba(49, 225, 196, 0.14);
  --c-orange-soft: rgba(255, 138, 60, 0.12);
  --c-dim: rgba(159, 181, 174, 0.72);

  --f-display: "Arial Narrow", "Helvetica Neue Condensed", "Oswald", system-ui, "PingFang SC", "Microsoft YaHei", sans-serif;
  --f-body: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --f-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, "Courier New", monospace;

  --header-h: 68px;
  --maxw: 1240px;
  --gutter: clamp(16px, 3.6vw, 40px);
  --measure: 34em;
  --r-sm: 2px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur: 0.18s;
}

/* ---------- base ---------- */
body {
  background-color: var(--c-ink);
  color: var(--c-paper);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  letter-spacing: 0.01em;
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.55;
  background-image:
    linear-gradient(rgba(28, 85, 72, 0.32) 1px, transparent 1px),
    linear-gradient(90deg, rgba(28, 85, 72, 0.32) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(130% 95% at 50% 0%, #000 0%, transparent 78%);
          mask-image: radial-gradient(130% 95% at 50% 0%, #000 0%, transparent 78%);
}

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

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

.site-header :focus-visible,
.site-footer :focus-visible {
  box-shadow: 0 0 0 4px rgba(49, 225, 196, 0.22);
}

/* ---------- typography ---------- */
.display {
  font-family: var(--f-display);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.01em;
  text-transform: uppercase;
}
.display--xl { font-size: clamp(40px, 9.5vw, 128px); }
.display--lg { font-size: clamp(32px, 6vw, 72px); }
.display--md { font-size: clamp(26px, 4vw, 44px); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-cyan);
}
.eyebrow::before {
  content: "";
  display: block;
  width: 18px;
  height: 1px;
  background: currentColor;
}

.lede {
  font-size: 17px;
  line-height: 1.8;
  color: var(--c-mist);
  max-width: var(--measure);
}

.prose p { max-width: var(--measure); }
.prose p + p { margin-top: 1em; }
.prose h2 { font-size: clamp(20px, 2.6vw, 28px); margin-bottom: 0.6em; }
.prose h3 { font-size: 17px; margin: 1.6em 0 0.5em; color: var(--c-cyan); }

.num {
  font-family: var(--f-mono);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--c-orange);
}
.num--xl { font-size: clamp(38px, 6vw, 72px); }
.num--md { font-size: clamp(22px, 3vw, 34px); }
.num--cyan { color: var(--c-cyan); }

.idx {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-dim);
}

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

.stage-top { padding-top: calc(var(--header-h) + clamp(28px, 6vw, 64px)); }

.page-shell {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
  padding-top: calc(var(--header-h) + clamp(24px, 5vw, 56px));
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
}
@media (min-width: 1080px) {
  .page-shell { grid-template-columns: 220px minmax(0, 1fr); }
}

.stream { min-width: 0; }

/* 左侧速览条 */
.rail {
  min-width: 0;
}
@media (min-width: 1080px) {
  .rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    align-self: start;
  }
}
.rail-title {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-cyan);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-line);
}
.rail-list {
  display: flex;
  flex-direction: row;
  gap: 2px;
  margin-top: 10px;
  overflow-x: auto;
  padding-bottom: 4px;
}
@media (min-width: 1080px) {
  .rail-list { flex-direction: column; overflow: visible; padding-bottom: 0; }
}
.rail-item {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: none;
  padding: 9px 10px;
  border-left: 2px solid transparent;
  font-size: 14px;
  color: var(--c-mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.rail-item::before {
  content: attr(data-step);
  font-family: var(--f-mono);
  font-size: 11px;
  color: var(--c-grid);
}
.rail-item:hover {
  color: var(--c-paper);
  background: rgba(28, 85, 72, 0.35);
  border-left-color: var(--c-cyan-soft);
}
.rail-item[aria-current] {
  color: var(--c-paper);
  background: rgba(28, 85, 72, 0.42);
  border-left-color: var(--c-orange);
}

/* ---------- sections ---------- */
.section { padding-block: clamp(36px, 6.5vw, 84px); }
.section + .section { border-top: 1px solid var(--c-line-soft); }
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 20px;
  margin-bottom: clamp(20px, 3vw, 36px);
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 20px;
  border: 1px solid var(--c-grid);
  border-radius: var(--r-sm);
  background: rgba(15, 58, 47, 0.55);
  color: var(--c-paper);
  font-size: 14px;
  letter-spacing: 0.05em;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease),
              color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.btn:hover { border-color: var(--c-cyan); background: var(--c-cyan-soft); }
.btn:active { transform: translateY(1px); }
.btn--accent {
  border-color: rgba(255, 138, 60, 0.6);
  background: var(--c-orange-soft);
  color: var(--c-orange);
}
.btn--accent:hover { background: var(--c-orange); border-color: var(--c-orange); color: var(--c-deep); }
.btn--ghost { background: transparent; border-color: var(--c-line-soft); }

/* ---------- tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--c-grid);
  border-radius: 999px;
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-mist);
}
.tag--live { color: var(--c-cyan); border-color: rgba(49, 225, 196, 0.5); background: var(--c-cyan-soft); }
.tag--warn { color: var(--c-orange); border-color: rgba(255, 138, 60, 0.5); background: var(--c-orange-soft); }

/* ---------- cards ---------- */
.card {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--c-line);
  border-radius: var(--r-sm);
  background: linear-gradient(180deg, rgba(15, 58, 47, 0.72), rgba(8, 33, 27, 0.78));
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.card:hover { border-color: var(--c-cyan); }
.card--slant {
  clip-path: polygon(0 0, 100% 0, 100% 84%, 94% 100%, 0 100%);
}

/* ---------- breadcrumbs ---------- */
.breadcrumbs {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-dim);
}
.breadcrumbs ol { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.breadcrumbs li + li::before { content: "/"; margin-right: 8px; color: var(--c-grid); }
.breadcrumbs a { text-decoration: none; }
.breadcrumbs a:hover { color: var(--c-cyan); }
.breadcrumbs [aria-current="page"] { color: var(--c-paper); }

/* ---------- media ---------- */
.media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--c-line);
  border-radius: var(--r-sm);
  background: var(--c-board);
  aspect-ratio: 16 / 9;
}
.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image:
    linear-gradient(rgba(49, 225, 196, 0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(49, 225, 196, 0.14) 1px, transparent 1px);
  background-size: 32px 32px;
}
.media--21x9 { aspect-ratio: 21 / 9; }
.media--4x5 { aspect-ratio: 4 / 5; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--empty {
  background-image:
    linear-gradient(rgba(49, 225, 196, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(49, 225, 196, 0.12) 1px, transparent 1px);
  background-size: 28px 28px;
  background-color: var(--c-board);
}
.media-caption {
  margin-top: 10px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-dim);
}

/* ---------- tabs ---------- */
.tabs { border-top: 1px solid transparent; }
.tabs-list {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--c-line);
  overflow-x: auto;
}
.tab {
  position: relative;
  flex: none;
  padding: 12px 18px;
  border: 1px solid transparent;
  border-bottom: 0;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--c-mist);
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.tab:hover { color: var(--c-paper); background: rgba(28, 85, 72, 0.35); }
.tab[aria-selected="true"] {
  color: var(--c-paper);
  background: rgba(15, 58, 47, 0.78);
  border-color: var(--c-line);
}
.tab[aria-selected="true"]::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: -1px;
  height: 2px;
  background: var(--c-cyan);
}
.tab-panel { padding-top: clamp(18px, 3vw, 28px); }
.tab-panel[hidden] { display: none; }

/* ---------- reveal ---------- */
[data-reveal] {
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
}
[data-js="on"] [data-reveal] { opacity: 0; transform: translateY(12px); }
[data-js="on"] [data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 16px;
  border-radius: var(--r-sm);
  background: var(--c-cyan);
  color: var(--c-deep);
  font-size: 14px;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* =========================================================
   Header
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  margin-bottom: calc(var(--header-h) * -1);
  background: transparent;
  border-bottom: 1px solid transparent;
  color: var(--c-paper);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.site-header[data-scrolled="true"] {
  background: rgba(8, 33, 27, 0.95);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
          backdrop-filter: blur(10px) saturate(140%);
  border-bottom-color: var(--c-line);
}

.header-inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 26px);
}

.brand {
  flex: none;
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding-left: 12px;
  border-left: 3px solid var(--c-cyan);
  line-height: 1.15;
  text-decoration: none;
}
.brand-mark {
  font-family: var(--f-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--c-paper);
  transition: color var(--dur) var(--ease);
}
.brand-sub {
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--c-mist);
}
.brand:hover .brand-mark { color: var(--c-cyan); }

.site-nav {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  justify-content: center;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(6px, 1.5vw, 24px);
}
.nav-list a {
  position: relative;
  display: block;
  padding: 6px 2px;
  font-size: 14px;
  letter-spacing: 0.03em;
  color: var(--c-mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease);
}
.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--c-cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.nav-list a:hover { color: var(--c-paper); }
.nav-list a:hover::after { transform: scaleX(1); background: var(--c-grid); }
.nav-list a[aria-current="page"] { color: var(--c-paper); }
.nav-list a[aria-current="page"]::after { transform: scaleX(1); }

.nav-quick { display: none; }

.header-actions {
  flex: none;
  display: flex;
  gap: 8px;
}

.action-link {
  display: inline-flex;
  align-items: center;
  padding: 9px 14px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-sm);
  background: rgba(15, 58, 47, 0.5);
  color: var(--c-paper);
  font-size: 13px;
  letter-spacing: 0.05em;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.action-link:hover { border-color: var(--c-cyan); background: var(--c-cyan-soft); }
.action-link--accent {
  border-color: rgba(255, 138, 60, 0.6);
  background: var(--c-orange-soft);
  color: var(--c-orange);
}
.action-link--accent:hover { background: var(--c-orange); border-color: var(--c-orange); color: var(--c-deep); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  flex: none;
  padding: 9px 12px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-sm);
  background: rgba(15, 58, 47, 0.55);
  color: var(--c-paper);
  cursor: pointer;
}
.nav-toggle-bars {
  position: relative;
  display: block;
  width: 18px;
  height: 10px;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--c-cyan);
  transition: transform var(--dur) var(--ease), top var(--dur) var(--ease);
}
.nav-toggle-bars::before { top: 0; }
.nav-toggle-bars::after { top: 8px; }
.nav-toggle-label {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.site-header[data-open="true"] .nav-toggle-bars::before { top: 4px; transform: rotate(45deg); }
.site-header[data-open="true"] .nav-toggle-bars::after { top: 4px; transform: rotate(-45deg); }

.header-meter {
  height: 2px;
  overflow: hidden;
  background: transparent;
}
.header-meter::after {
  content: "";
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-orange));
  transform: scaleX(var(--scroll-progress, 0));
  transform-origin: left center;
}

/* header: tablet & mobile */
@media (max-width: 1024px) {
  .nav-toggle { display: inline-flex; }
  .header-actions { display: none; }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: block;
    padding: 12px var(--gutter) 20px;
    background: rgba(5, 16, 13, 0.98);
    border-top: 1px solid var(--c-line);
    border-bottom: 1px solid var(--c-line);
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur) linear;
  }
  .site-header[data-open="true"] { background: rgba(5, 16, 13, 0.98); }
  .site-header[data-open="true"] .site-nav {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .nav-list a {
    padding: 15px 2px;
    font-size: 16px;
    border-bottom: 1px solid var(--c-line-soft);
  }
  .nav-list a::after { display: none; }
  .nav-list a[aria-current="page"] { color: var(--c-cyan); }

  .nav-quick {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-top: 18px;
  }
  .nav-quick .action-link { justify-content: center; padding: 12px 10px; }
}

@media (max-width: 480px) {
  .brand-sub { display: none; }
  .nav-quick { grid-template-columns: 1fr; }
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  margin-top: clamp(48px, 8vw, 112px);
  background: var(--c-deep);
  border-top: 1px solid var(--c-line);
  color: var(--c-mist);
  font-size: 14px;
}
.footer-inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(36px, 6vw, 72px) var(--gutter) 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: clamp(24px, 4vw, 56px);
}
.footer-brand { max-width: 34em; }
.footer-mark {
  display: inline-block;
  padding-left: 12px;
  border-left: 3px solid var(--c-orange);
  font-family: var(--f-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--c-paper);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}
.footer-mark:hover { color: var(--c-cyan); }
.footer-tagline {
  margin-top: 14px;
  line-height: 1.8;
  max-width: 32em;
}
.footer-note {
  margin-top: 10px;
  font-size: 13px;
  color: var(--c-dim);
}
.footer-address {
  margin-top: 12px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-dim);
}

.footer-col { min-width: 0; }
.footer-col-title {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-line);
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-cyan);
}
.footer-links {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  display: inline-block;
  color: var(--c-mist);
  text-decoration: none;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}
.footer-links a:hover { color: var(--c-paper); padding-left: 6px; }

.footer-base {
  margin-top: clamp(32px, 5vw, 56px);
  padding: 20px 0 28px;
  border-top: 1px solid var(--c-line);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}
.footer-contact { color: var(--c-mist); }
.footer-legal { color: var(--c-dim); }

@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* =========================================================
   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;
  }
  [data-js="on"] [data-reveal] { opacity: 1; transform: none; }
  .header-meter::after { transition: none; }
}