/* ============================================================
   乐竞体育中文站 · 共享样式 / assets/site.css
   夜间战术板：深靛场域 + 荧光青数据线索 + 暖橙行动点
   ============================================================ */

/* ---------- 0. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
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 { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
button { background: none; border: 0; cursor: pointer; }

/* ---------- 1. Design tokens ---------- */
:root {
  --ink-0: #070B1F;
  --ink-1: #0F1733;
  --ink-2: #17224A;
  --line: #2A3768;
  --white: #F2F5FF;
  --mist: #9AA4C4;
  --cyan: #2BE7D0;
  --cyan-soft: #7CF3E4;
  --orange: #FF7A33;
  --orange-deep: #C7501A;

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

  --shell-max: 1440px;
  --pad-x: clamp(1rem, 4vw, 2.5rem);
  --gutter: clamp(1rem, 2.2vw, 1.75rem);
  --block: clamp(3rem, 7vw, 5.5rem);
  --pill: 999px;
  --line-w: 2px;
  --shadow-hard: 6px 6px 0 0 rgba(7, 11, 31, .85);
  --shadow-soft: 0 18px 44px -22px rgba(0, 0, 0, .95);
}

/* ---------- 2. Base typography ---------- */
body {
  background: var(--ink-0);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.7;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
::selection { background: var(--cyan); color: #04121a; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -.015em;
}
p { max-width: 38ch; }
.mono, .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

main { padding-top: clamp(100px, 13vh, 140px); }
#main-content { scroll-margin-top: 130px; }

/* ---------- 3. Layout helpers ---------- */
.wrap {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}
.section { padding-block: var(--block); }
.section + .section { border-top: var(--line-w) solid var(--line); }

.split {
  display: grid;
  grid-template-columns: minmax(220px, 4fr) minmax(0, 8fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: start;
}
.split-rail { position: sticky; top: 118px; align-self: start; }

.grid { display: grid; gap: var(--gutter); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.divider { height: var(--line-w); background: var(--line); border: 0; margin: 0; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  margin: -1px; padding: 0; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- 4. Section headers & chapter system ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: var(--line-w);
  background: var(--cyan);
  flex: none;
}

.section-head { display: grid; gap: .55rem; margin-bottom: clamp(1.5rem, 3vw, 2.5rem); }
.section-title {
  font-size: clamp(2rem, 4.5vw, 3.6rem);
  color: var(--white);
  margin: 0;
}
.section-sub { font-size: .95rem; color: var(--mist); max-width: 40ch; }

.chapter-index {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(4rem, 12vw, 13rem);
  line-height: .78;
  letter-spacing: -.05em;
  color: transparent;
  -webkit-text-stroke: 2px var(--line);
  user-select: none;
}

.chapter-nav {
  display: flex;
  flex-direction: column;
  gap: .1rem;
  border-left: var(--line-w) solid var(--line);
  padding-left: .9rem;
}
.chapter-nav a {
  display: flex;
  align-items: baseline;
  gap: .6rem;
  padding: .42rem 0;
  color: var(--mist);
  font-size: .86rem;
  font-weight: 700;
  transition: color .2s ease, transform .2s ease;
}
.chapter-nav a:hover { color: var(--white); transform: translateX(3px); }
.chapter-nav a[data-active] { color: var(--cyan); }
.chapter-nav-num {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--line);
  transition: color .2s ease;
}
.chapter-nav a[data-active] .chapter-nav-num { color: var(--orange); }

.lede { font-size: 1.02rem; line-height: 1.75; color: var(--mist); max-width: 38ch; }

/* ---------- 5. Buttons & chips ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .72rem 1.2rem;
  border: var(--line-w) solid transparent;
  border-radius: var(--pill);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: .88rem;
  letter-spacing: .03em;
  white-space: nowrap;
  transition: transform .18s ease, background-color .18s ease, color .18s ease,
              border-color .18s ease, box-shadow .18s ease;
}
.btn-primary {
  background: var(--orange);
  color: #150700;
  box-shadow: 0 4px 0 0 var(--orange-deep);
}
.btn-primary:hover { background: #FF9257; transform: translateY(-1px); }
.btn-primary:active { transform: translateY(3px); box-shadow: 0 1px 0 0 var(--orange-deep); }
.btn-ghost {
  background: transparent;
  color: var(--white);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }
.btn-sm { padding: .5rem .9rem; font-size: .8rem; }

.chip-row { display: flex; flex-wrap: wrap; gap: .5rem; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .34rem .75rem;
  border: var(--line-w) solid var(--line);
  border-radius: var(--pill);
  background: transparent;
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .04em;
  transition: color .18s ease, border-color .18s ease, background-color .18s ease;
}
.chip:hover { border-color: var(--cyan); color: var(--cyan); }
.chip[aria-pressed="true"],
.chip[data-active] { background: var(--cyan); border-color: var(--cyan); color: #04121a; }

/* ---------- 6. Cards, stats, tags ---------- */
.card {
  position: relative;
  background: var(--ink-2);
  border: var(--line-w) solid var(--line);
  box-shadow: var(--shadow-hard);
  padding: clamp(1rem, 2vw, 1.5rem);
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.card:hover {
  transform: translate(-3px, -3px);
  border-color: var(--cyan);
  box-shadow: 10px 10px 0 0 rgba(43, 231, 208, .26);
}
.card-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: .01em;
  color: var(--white);
  margin: 0;
}
.card-meta {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--mist);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  padding: .85rem 1rem;
  border: var(--line-w) solid var(--line);
  border-left: 4px solid var(--cyan);
  background: linear-gradient(180deg, rgba(43, 231, 208, .08), transparent);
}
.stat-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--white);
}
.stat-label { font-size: .74rem; letter-spacing: .06em; color: var(--mist); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .2rem .5rem;
  border: var(--line-w) solid var(--line);
  font-family: var(--font-mono);
  font-size: .66rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--mist);
}
.tag--live { color: var(--orange); border-color: var(--orange); }

/* ---------- 7. Breadcrumbs ---------- */
.breadcrumbs {
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .04em;
  color: var(--mist);
  margin-bottom: 1.2rem;
}
.breadcrumbs ol { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; }
.breadcrumbs li { display: inline-flex; align-items: center; gap: .5rem; }
.breadcrumbs li + li::before { content: "/"; color: var(--line); }
.breadcrumbs a { color: var(--mist); border-bottom: 1px solid transparent; transition: color .18s ease, border-color .18s ease; }
.breadcrumbs a:hover { color: var(--cyan); border-color: var(--cyan); }
.breadcrumbs [aria-current="page"] { color: var(--white); }

/* ---------- 8. Media frames (供页面阶段放置图片占位) ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 3px solid var(--line);
  background: linear-gradient(135deg, var(--ink-2), var(--ink-0));
  box-shadow: 8px 8px 0 0 rgba(7, 11, 31, .9);
}
.media-frame img { width: 100%; height: 100%; object-fit: cover; }
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(43, 231, 208, .07) 1px, transparent 1px);
  background-size: 100% 30px;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--map { aspect-ratio: 1 / 1; }
.media-caption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: .65rem .85rem;
  background: linear-gradient(180deg, transparent, rgba(7, 11, 31, .94));
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--cyan);
}

/* ---------- 9. Header ---------- */
.skip-link {
  position: fixed;
  top: .55rem;
  left: .55rem;
  z-index: 200;
  transform: translateY(-180%);
  padding: .6rem 1rem;
  background: var(--cyan);
  color: #04121a;
  font-weight: 800;
  font-size: .82rem;
  border: var(--line-w) solid #04121a;
  transition: transform .2s ease;
}
.skip-link:focus { transform: translateY(0); }

.scroll-progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  z-index: 130;
  background: rgba(42, 55, 104, .45);
  pointer-events: none;
}
.scroll-progress > span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--cyan-soft) 48%, var(--orange) 100%);
  transition: width .14s linear;
}

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: clamp(.8rem, 1.8vw, 1.15rem) var(--pad-x);
  transition: padding .25s ease;
}
.header-shell { max-width: var(--shell-max); margin-inline: auto; }

.capsule {
  position: relative;
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .45rem .5rem .45rem .8rem;
  border: var(--line-w) solid var(--line);
  border-radius: var(--pill);
  background: rgba(15, 23, 51, .88);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-soft);
  transition: padding .25s ease, box-shadow .25s ease;
}

.brand { display: flex; align-items: center; gap: .65rem; flex: none; }
.brand-mark {
  width: 38px; height: 38px;
  display: grid;
  place-items: center;
  border: var(--line-w) solid rgba(43, 231, 208, .55);
  border-radius: 12px;
  background: linear-gradient(140deg, var(--cyan), #17A79B);
  color: #04121a;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  transition: width .25s ease, height .25s ease, font-size .25s ease;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.08; }
.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: .95rem;
  letter-spacing: .02em;
  color: var(--white);
  white-space: nowrap;
}
.brand-tag {
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .08em;
  color: var(--mist);
  white-space: nowrap;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: .1rem;
  margin-inline: auto;
}
.nav-link {
  display: block;
  padding: .5rem .78rem;
  border-radius: var(--pill);
  color: var(--mist);
  font-size: .86rem;
  font-weight: 700;
  white-space: nowrap;
  transition: color .2s ease, background-color .2s ease;
}
.nav-link:hover { color: var(--white); background: rgba(43, 231, 208, .12); }
.nav-link[aria-current="page"] { color: var(--ink-0); background: var(--cyan); }
.nav-link[aria-current="page"]:hover { color: var(--ink-0); background: var(--cyan-soft); }

.nav-actions { display: flex; align-items: center; gap: .45rem; flex: none; }
.nav-fav {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .48rem .8rem;
  border: var(--line-w) solid var(--line);
  border-radius: var(--pill);
  color: var(--white);
  font-size: .8rem;
  font-weight: 700;
  white-space: nowrap;
  transition: color .18s ease, border-color .18s ease;
}
.nav-fav::before {
  content: "";
  width: 8px; height: 8px;
  background: var(--orange);
  transform: rotate(45deg);
  transition: background-color .18s ease;
}
.nav-fav:hover { border-color: var(--orange); color: var(--orange); }
.nav-fav:hover::before { background: var(--cyan); }

.nav-toggle {
  display: none;
  position: relative;
  width: 44px; height: 44px;
  flex: none;
  border: var(--line-w) solid var(--line);
  border-radius: 50%;
  transition: border-color .2s ease;
}
.nav-toggle:hover { border-color: var(--cyan); }
.nav-toggle-bar,
.nav-toggle-bar::before,
.nav-toggle-bar::after {
  position: absolute;
  left: 50%;
  width: 18px;
  height: var(--line-w);
  background: var(--white);
  transition: transform .22s ease, background-color .22s ease, opacity .22s ease;
}
.nav-toggle-bar { top: 50%; transform: translate(-50%, -50%); }
.nav-toggle-bar::before { content: ""; top: -6px; left: 0; transform: none; }
.nav-toggle-bar::after { content: ""; top: 6px; left: 0; transform: none; }

.site-header[data-open] .nav-toggle-bar { background: transparent; }
.site-header[data-open] .nav-toggle-bar::before { transform: translateY(6px) rotate(45deg); background: var(--cyan); }
.site-header[data-open] .nav-toggle-bar::after { transform: translateY(-6px) rotate(-45deg); background: var(--cyan); }

.site-header[data-collapsed] { padding-top: .4rem; padding-bottom: .4rem; }
.site-header[data-collapsed] .capsule { padding: .28rem .4rem .28rem .6rem; box-shadow: 0 12px 30px -18px rgba(0, 0, 0, .95); }
.site-header[data-collapsed] .brand-tag { display: none; }
.site-header[data-collapsed] .brand-mark { width: 32px; height: 32px; font-size: 1rem; }

/* ---------- 10. Footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(3.5rem, 8vw, 6rem);
  border-top: 3px solid var(--line);
  background: linear-gradient(180deg, var(--ink-1) 0%, var(--ink-0) 74%);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -3px; left: 0;
  width: min(220px, 42%);
  height: 3px;
  background: var(--cyan);
}
.footer-shell {
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: clamp(2.5rem, 5vw, 4rem) var(--pad-x) 1.5rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.4fr;
  gap: clamp(1.5rem, 3vw, 2.5rem);
}
.footer-logo {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.3rem;
  letter-spacing: .02em;
  color: var(--white);
  transition: color .2s ease;
}
.footer-logo:hover { color: var(--cyan); }
.footer-tagline {
  margin-top: .35rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--cyan);
}
.footer-note {
  margin-top: .9rem;
  font-size: .82rem;
  line-height: 1.7;
  color: var(--mist);
  max-width: 34ch;
}
.footer-heading {
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: .9rem;
}
.footer-list li + li { margin-top: .5rem; }
.footer-list a {
  font-size: .86rem;
  color: var(--mist);
  border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}
.footer-list a:hover { color: var(--white); border-color: var(--cyan); }
.footer-list--plain li { font-size: .82rem; line-height: 1.65; color: var(--mist); }

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .8rem 1.5rem;
  margin-top: clamp(2rem, 4vw, 3rem);
  padding-top: 1.1rem;
  border-top: var(--line-w) solid var(--line);
}
.footer-legal { font-size: .76rem; color: var(--mist); max-width: none; }
.footer-legal-links { display: flex; flex-wrap: wrap; gap: 1rem; }
.footer-legal-links a {
  font-size: .76rem;
  color: var(--mist);
  border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}
.footer-legal-links a:hover { color: var(--cyan); border-color: var(--cyan); }

/* ---------- 11. Motion ---------- */
[data-reveal] { opacity: 1; }
@media (prefers-reduced-motion: no-preference) {
  [data-reveal] {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity .32s ease, transform .32s ease;
  }
  [data-reveal].is-visible { opacity: 1; transform: none; }
}

/* ---------- 12. Focus ---------- */
:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}
.btn:focus-visible,
.chip:focus-visible,
.nav-toggle:focus-visible { outline-offset: 2px; }

/* ---------- 13. Responsive ---------- */
@media (max-width: 1180px) {
  .nav-link { padding: .5rem .6rem; font-size: .82rem; }
  .nav-fav { display: none; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 1000px) {
  .nav-toggle { display: block; }
  .nav-list {
    position: absolute;
    top: calc(100% + .6rem);
    left: 0; right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: .25rem;
    margin: 0;
    padding: .75rem;
    border: var(--line-w) solid var(--line);
    border-radius: 22px;
    background: rgba(15, 23, 51, .98);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    box-shadow: 0 24px 50px -22px rgba(0, 0, 0, .95);
  }
  .site-header[data-open] .nav-list { display: flex; }
  .nav-link {
    padding: .8rem .95rem;
    border-radius: 14px;
    font-size: .95rem;
    color: var(--white);
  }
  .nav-link[aria-current="page"] { color: var(--ink-0); }
  .nav-actions { margin-inline-start: auto; }
  .brand-tag { display: none; }
}

@media (max-width: 960px) {
  .split { grid-template-columns: 1fr; }
  .split-rail { position: static; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .chapter-index { font-size: clamp(3.5rem, 20vw, 7rem); }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-base { flex-direction: column; align-items: flex-start; }
  .capsule { padding: .4rem .4rem .4rem .7rem; gap: .4rem; }
  .brand-name { font-size: .88rem; }
  .btn-sm { padding: .45rem .7rem; font-size: .74rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}