/* ==========================================================================
   乐竞体育 CN 站 · /assets/site.css
   竞技场夜光 / 深靛网格底盘 · 荧光青 + 电光橙数据高亮 · 锐利直角精密网格
   ========================================================================== */

/* ---------- 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, figure, blockquote, dl, dd, ul, ol { margin: 0; }

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

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

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

button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

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

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

/* ---------- 2. Tokens ---------- */
:root {
  /* 色板 */
  --ink: #0A0D1A;
  --ink-2: #131A2E;
  --line: #223052;
  --paper: #F4F0E6;
  --paper-ink: #131A2E;
  --paper-line: #D9D2C2;
  --white: #FCFAF4;
  --cyan: #2BE3C8;
  --orange: #FF6A1A;
  --gray: #8A97B2;
  --deep-ink: #0E3B3A;
  --amber: #A83C0C;

  /* 版面 */
  --shell: 1280px;
  --shell-wide: 1560px;
  --gutter: clamp(18px, 4vw, 54px);
  --baseline: 8px;

  /* 字体 */
  --font-body: "Inter", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-display: "Source Han Sans SC", "PingFang SC", "Noto Sans SC", "Helvetica Neue", Inter, system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  /* 动效 */
  --ease: cubic-bezier(.22, .61, .36, 1);
  --t-fast: 160ms;
  --t-mid: 220ms;
  --t-enter: 320ms;
}

/* ---------- 3. 基础排版 ---------- */
html { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

body {
  background-color: var(--ink);
  background-image:
    linear-gradient(to right, rgba(34, 48, 82, .34) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(34, 48, 82, .34) 1px, transparent 1px);
  background-size: 96px 96px;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.9;
  letter-spacing: .01em;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: .01em;
  color: var(--white);
}

h1 { font-size: clamp(30px, 4.6vw, 54px); line-height: 1.04; }
h2 { font-size: clamp(24px, 3vw, 34px); }
h3 { font-size: clamp(19px, 2vw, 24px); }
h4 { font-size: 17px; letter-spacing: .04em; }

.title-xl {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(44px, 8vw, 96px);
  line-height: .95;
  letter-spacing: -.012em;
}

.title-l {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.02;
}

.title-m {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.4vw, 28px);
  line-height: 1.16;
}

.index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--gray);
}

.index--cyan { color: var(--cyan); }

.lede {
  font-size: clamp(17px, 1.5vw, 21px);
  line-height: 1.75;
  color: rgba(252, 250, 244, .9);
  max-width: 40ch;
}

.prose {
  max-width: 38em;
  font-size: clamp(16px, 1.05vw, 17.5px);
  line-height: 1.9;
  color: rgba(252, 250, 244, .88);
}

.prose > * + * { margin-top: 1.1em; }

.prose h2 { margin-top: 1.6em; font-size: clamp(22px, 2.4vw, 30px); }

.prose h3 { margin-top: 1.4em; }

.prose strong { color: var(--white); font-weight: 700; }

.prose a {
  color: var(--cyan);
  border-bottom: 1px solid rgba(43, 227, 200, .45);
}

.prose ul, .prose ol { padding-left: 1.2em; }

.prose ul li, .prose ol li { margin-top: .5em; }

.prose ul li { list-style: square; }

.prose ol li { list-style: decimal; }

.panel--paper .prose { color: #26304A; }

.panel--paper .prose strong,
.panel--paper .prose h2,
.panel--paper .prose h3 { color: var(--paper-ink); }

.mono { font-family: var(--font-mono); letter-spacing: .02em; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -80px;
  z-index: 200;
  background: var(--orange);
  color: #12060A;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  padding: 10px 16px;
  transition: top var(--t-fast) var(--ease);
}

.skip-link:focus { top: 12px; }

#main-content { display: block; scroll-margin-top: 96px; }

/* ---------- 4. 布局与网格 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.shell--wide { max-width: var(--shell-wide); }

.section { padding-block: clamp(48px, 7vw, 104px); }

.section--tight { padding-block: clamp(28px, 4vw, 56px); }

.rule { height: 1px; background: var(--line); border: 0; }

.stack > * + * { margin-top: var(--stack-gap, 16px); }

.grid {
  display: grid;
  gap: clamp(14px, 1.6vw, 24px);
}

.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

.grid--auto { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.g-2 { grid-column: span 2; }
.g-3 { grid-column: span 3; }
.g-4 { grid-column: span 4; }
.g-5 { grid-column: span 5; }
.g-6 { grid-column: span 6; }
.g-7 { grid-column: span 7; }
.g-8 { grid-column: span 8; }
.g-12 { grid-column: span 12; }

@media (max-width: 899px) {
  .grid--12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .g-2, .g-3 { grid-column: span 3; }
  .g-4, .g-5, .g-6, .g-7, .g-8 { grid-column: span 6; }
}

/* ---------- 5. 通用组件 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  padding: 12px 20px;
  border: 1px solid transparent;
  background: var(--ink-2);
  color: var(--white);
  transition: background var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease);
}

.btn--primary {
  background: var(--orange);
  color: #14060A;
  font-weight: 700;
}

.btn--primary:hover { background: #FF8340; }

.btn--ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--white);
}

.btn--ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.btn--quiet {
  background: transparent;
  padding: 4px 2px;
  color: var(--cyan);
  border-bottom: 1px solid rgba(43, 227, 200, .45);
}

.btn--quiet:hover { color: var(--white); border-color: var(--white); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--gray);
  border: 1px solid var(--line);
  background: rgba(34, 48, 82, .25);
  padding: 4px 8px;
}

.tag--cyan { color: var(--cyan); border-color: rgba(43, 227, 200, .45); }

.tag--orange { color: var(--orange); border-color: rgba(255, 106, 26, .45); }

.panel {
  border: 1px solid var(--line);
  background: var(--ink-2);
  padding: clamp(18px, 2.4vw, 32px);
}

.panel--paper {
  background-color: var(--paper);
  background-image: radial-gradient(rgba(19, 26, 46, .06) 1px, transparent 1px);
  background-size: 4px 4px;
  border-color: var(--paper-line);
  color: var(--paper-ink);
}

.panel--data {
  background: var(--deep-ink);
  border-color: #175150;
}

.panel--cut {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}

.metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.metric__value {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.metric__value--orange { color: var(--orange); }

.metric__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--gray);
}

/* 图片容器：共享头脚不放图片，页面阶段往容器内放 <img> */
.media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--deep-ink);
  border: 1px solid var(--line);
}

.media--wide { aspect-ratio: 21 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }

.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.94) contrast(1.06);
}

.media__net {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .5;
  background-image:
    linear-gradient(rgba(43, 227, 200, .16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(43, 227, 200, .16) 1px, transparent 1px);
  background-size: 22px 22px;
}

.media__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--white);
  background: linear-gradient(to top, rgba(10, 13, 26, .9), rgba(10, 13, 26, 0));
}

.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--gray);
}

.crumbs__item { color: var(--gray); }

.crumbs__item:hover { color: var(--cyan); }

.crumbs__sep { color: var(--line); }

.crumbs__current { color: var(--cyan); }

/* 进入动效协议 */
[data-reveal] { opacity: 1; transform: none; }

html[data-js="on"] [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--t-enter) var(--ease), transform var(--t-enter) var(--ease);
}

html[data-js="on"] [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 6. 刊头（共享头部） ---------- */
.masthead {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--ink);
  border-bottom: 1px solid var(--line);
  isolation: isolate;
}

.masthead::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .7;
  background-image: repeating-linear-gradient(90deg, rgba(43, 227, 200, .05) 0 1px, transparent 1px 48px);
}

.masthead__progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 120ms linear;
}

.masthead__inner {
  position: relative;
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: 10px var(--gutter) 12px;
  display: flex;
  flex-direction: column;
}

.masthead__brandrow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 5px;
  padding-block: 6px;
  text-align: left;
}

.brand__mark {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--cyan);
  transition: color var(--t-fast) var(--ease);
}

.brand:hover .brand__mark { color: var(--orange); }

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.brand__line {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.15;
  letter-spacing: .08em;
  color: var(--white);
}

.brand__tag {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gray);
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  background: var(--ink-2);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.nav-toggle:hover { border-color: var(--cyan); }

.nav-toggle[aria-expanded="true"] {
  border-color: var(--cyan);
  color: var(--cyan);
}

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 18px;
}

.nav-toggle__bars i {
  display: block;
  height: 1px;
  background: currentColor;
  transition: transform var(--t-mid) var(--ease), opacity var(--t-mid) var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:first-child { transform: translateY(4px) 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:last-child { transform: translateY(-4px) rotate(-45deg); }

.nav-toggle__label { line-height: 1; }

.masthead__nav {
  display: none;
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  flex-direction: column;
  background: var(--ink-2);
  border-bottom: 1px solid var(--line);
  padding: 6px var(--gutter) 22px;
  max-height: calc(100vh - 84px);
  overflow-y: auto;
}

.masthead__nav[data-open] { display: flex; }

.nav-list { display: flex; flex-direction: column; }

.nav-list__item { border-bottom: 1px solid rgba(34, 48, 82, .8); }

.nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 2px;
  font-size: 16px;
  letter-spacing: .06em;
  color: var(--white);
  transition: color var(--t-fast) var(--ease), padding-left var(--t-fast) var(--ease);
}

.nav-link::after {
  content: "";
  width: 6px;
  height: 6px;
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
  transform: rotate(45deg);
  transition: border-color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}

.nav-link:hover {
  color: var(--cyan);
  padding-left: 6px;
}

.nav-link:hover::after { border-color: var(--cyan); }

.nav-link[aria-current="page"] { color: var(--cyan); }

.nav-link[aria-current="page"]::after {
  background: var(--cyan);
  border-color: var(--cyan);
}

.masthead__aside {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
}

.util-link {
  padding: 6px 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--gray);
  transition: color var(--t-fast) var(--ease);
}

.util-link:hover { color: var(--cyan); }

.masthead__aside .btn { width: 100%; }

.masthead[data-scrolled] .masthead__inner { padding-block: 8px; }

/* 桌面刊头：报头居中，栏目在其下展开 */
@media (min-width: 900px) {
  .masthead__inner {
    align-items: center;
    padding: 20px var(--gutter) 14px;
  }

  .masthead__brandrow {
    display: block;
    width: 100%;
    text-align: center;
  }

  .brand {
    align-items: center;
    text-align: center;
    gap: 7px;
    padding-block: 0;
  }

  .brand__text { align-items: center; }

  .brand__line { font-size: clamp(24px, 2.6vw, 32px); }

  .nav-toggle { display: none; }

  .masthead__nav {
    position: static;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    width: 100%;
    max-height: none;
    overflow: visible;
    background: transparent;
    border: 0;
    padding: 0;
    margin-top: 14px;
  }

  .nav-list {
    grid-column: 2;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: clamp(12px, 1.9vw, 28px);
  }

  .nav-list__item { border-bottom: 0; }

  .nav-link {
    padding: 8px 2px;
    font-size: 14px;
    letter-spacing: .08em;
  }

  .nav-link::after { display: none; }

  .nav-link:hover { padding-left: 2px; }

  .nav-link[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--cyan); }

  .masthead__aside {
    grid-column: 3;
    justify-self: end;
    flex-direction: row;
    align-items: center;
    gap: 16px;
    margin-top: 0;
    padding-top: 0;
    border-top: 0;
  }

  .masthead__aside .btn { width: auto; }

  /* 滚动后：收为细窄横条，右侧保留版本对照与支持入口 */
  .masthead[data-scrolled] .masthead__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 8px var(--gutter);
  }

  .masthead[data-scrolled] .masthead__brandrow {
    width: auto;
    text-align: left;
  }

  .masthead[data-scrolled] .brand {
    flex-direction: row;
    align-items: center;
    gap: 12px;
  }

  .masthead[data-scrolled] .brand__text {
    flex-direction: row;
    align-items: baseline;
    gap: 10px;
  }

  .masthead[data-scrolled] .brand__line {
    font-size: 16px;
    letter-spacing: .1em;
  }

  .masthead[data-scrolled] .brand__tag { display: none; }

  .masthead[data-scrolled] .masthead__nav {
    display: flex;
    align-items: center;
    width: auto;
    margin-top: 0;
    gap: 20px;
  }

  .masthead[data-scrolled] .nav-list { gap: 16px; }

  .masthead[data-scrolled] .nav-link { font-size: 13px; }

  .masthead[data-scrolled] .util-link { font-size: 11.5px; }

  .masthead[data-scrolled] .btn {
    padding: 9px 14px;
    font-size: 12px;
  }
}

/* ---------- 7. 页脚（共享尾部） ---------- */
.site-foot {
  position: relative;
  overflow: hidden;
  background: var(--ink-2);
  border-top: 1px solid var(--line);
  color: var(--white);
}

.site-foot::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .4;
  background-image:
    linear-gradient(to right, rgba(34, 48, 82, .9) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(34, 48, 82, .9) 1px, transparent 1px);
  background-size: 64px 64px;
}

.site-foot__band {
  position: relative;
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(22px, 3vw, 32px) var(--gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--line);
}

.site-foot__closing {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.2vw, 26px);
  line-height: 1.3;
  letter-spacing: .02em;
  color: var(--white);
}

.site-foot__grid {
  position: relative;
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(28px, 4vw, 52px) var(--gutter);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3vw, 44px);
}

.site-foot__brandcol {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.site-foot__mark {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--orange);
}

.site-foot__brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: .08em;
  color: var(--white);
}

.site-foot__desc {
  max-width: 32ch;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--gray);
}

.site-foot__col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.site-foot__coltitle {
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}

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

.foot-link {
  display: inline-block;
  padding: 5px 0;
  font-size: 14px;
  color: rgba(252, 250, 244, .82);
  transition: color var(--t-fast) var(--ease), padding-left var(--t-fast) var(--ease);
}

.foot-link:hover {
  color: var(--cyan);
  padding-left: 6px;
}

.site-foot__meta {
  position: relative;
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: 20px var(--gutter) 34px;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px 28px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  line-height: 1.8;
  color: var(--gray);
}

.site-foot__contact { color: rgba(252, 250, 244, .86); }

.site-foot__key {
  margin-right: 6px;
  color: var(--cyan);
  letter-spacing: .14em;
}

.site-foot__dot { color: var(--line); }

.site-foot__addr,
.site-foot__icp,
.site-foot__year { color: var(--gray); }

@media (min-width: 640px) {
  .site-foot__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .site-foot__meta { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1000px) {
  .site-foot__grid { grid-template-columns: 1.6fr 1fr 1fr 1fr; }
  .site-foot__meta { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---------- 8. 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

  html[data-js="on"] [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .masthead__progress { transition: none; }
}