/* ============================================================
   爱体育月卡站 · 共享样式 /assets/site.css
   深空黑底 + 电光青框架，竞技数据仪表盘语言
   ============================================================ */

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  color: var(--paper);
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(35, 230, 208, .038) 1px, transparent 1px),
    linear-gradient(90deg, rgba(35, 230, 208, .038) 1px, transparent 1px);
  background-size: 80px 80px;
  padding-top: var(--bar-h);
  min-height: 100vh;
  overflow-x: hidden;
}

body.is-nav-open { overflow: hidden; }

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

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

p { margin: 0 0 1em; text-wrap: pretty; }

a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--paper); }

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

h1, h2, h3, h4 {
  margin: 0 0 .5em;
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--paper);
}

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

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

/* ---------- tokens ---------- */
:root {
  --ink: #060A0E;
  --ink-2: #0E1620;
  --ink-3: #121C26;
  --cyan: #23E6D0;
  --cyan-deep: #0FA8A0;
  --stoppage: #FF5A2B;
  --window: #FFB03A;
  --violet: #7C5CFF;
  --paper: #F2F6F7;
  --muted: #A9BAC4;
  --line: #6C7F8C;
  --hair: rgba(108, 127, 140, .38);
  --hair-soft: rgba(108, 127, 140, .18);

  --font-display: "Archivo Narrow", "Arial Narrow", "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "DejaVu Sans Mono", "Courier New", monospace;

  --rail-w: 248px;
  --bar-h: 62px;
  --gutter: clamp(18px, 4vw, 56px);
  --maxw: 1280px;
  --scroll: 0;
}

.num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: .01em;
}

/* ---------- skip link ---------- */
.skip-link {
  position: absolute;
  top: -120px;
  left: 16px;
  z-index: 400;
  padding: 10px 18px;
  background: var(--cyan);
  color: var(--ink);
  font-weight: 700;
  font-size: .9rem;
  transition: top .18s ease;
}

.skip-link:focus { top: 12px; color: var(--ink); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: 0;
  font-family: var(--font-body);
  font-size: .9rem;
  font-weight: 600;
  letter-spacing: .02em;
  line-height: 1.2;
  text-align: center;
  cursor: pointer;
  transition: background-color .18s ease, color .18s ease, border-color .18s ease;
}

.btn-solid {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
}
.btn-solid:hover,
.btn-solid:focus-visible { background: var(--paper); border-color: var(--paper); color: var(--ink); }

.btn-line {
  background: transparent;
  border-color: var(--cyan-deep);
  color: var(--cyan);
}
.btn-line:hover,
.btn-line:focus-visible { border-color: var(--cyan); background: rgba(35, 230, 208, .12); color: var(--paper); }

.btn-sm { padding: 8px 14px; font-size: .82rem; }
.btn-block { display: flex; width: 100%; }

/* ---------- header : mobile / tablet top bar ---------- */
.site-header {
  position: fixed;
  z-index: 300;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(6, 10, 14, .95);
  border-bottom: 1px solid var(--hair);
}

.header-bar {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  height: var(--bar-h);
  padding: 0 var(--gutter);
}

.header-bar::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 2px;
  width: calc(var(--scroll) * 1%);
  background: linear-gradient(90deg, var(--cyan), var(--stoppage));
}

.bar-brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--paper);
  flex: 0 0 auto;
}
.bar-brand:hover { color: var(--paper); }

.bar-mark {
  width: 12px;
  height: 12px;
  background: var(--cyan);
  clip-path: polygon(0 0, 100% 0, 100% 58%, 58% 100%, 0 100%);
}

.bar-name {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: .01em;
  white-space: nowrap;
}

.bar-version {
  display: none;
  margin: 0;
  font-size: .72rem;
  line-height: 1.3;
  color: var(--muted);
}
.bar-key { letter-spacing: .1em; }
.bar-num { color: var(--cyan); margin-left: 6px; }

.bar-cta { margin-left: auto; flex: 0 0 auto; }

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--hair);
  color: var(--muted);
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .06em;
  cursor: pointer;
  transition: border-color .18s ease, color .18s ease;
}
.nav-toggle:hover { border-color: var(--cyan-deep); color: var(--paper); }
.nav-toggle[aria-expanded="true"] { border-color: var(--cyan); color: var(--cyan); }

.nav-toggle-bars {
  width: 16px;
  height: 12px;
  background:
    linear-gradient(currentColor, currentColor) 0 0 / 16px 1.5px no-repeat,
    linear-gradient(currentColor, currentColor) 0 5.25px / 16px 1.5px no-repeat,
    linear-gradient(currentColor, currentColor) 0 10.5px / 16px 1.5px no-repeat;
}

.nav-toggle-text { display: none; }

/* ---------- header : nav (mobile panel) ---------- */
.site-nav {
  display: none;
  border-top: 1px solid var(--hair);
  background: var(--ink-2);
  max-height: calc(100vh - var(--bar-h));
  overflow-y: auto;
  padding: 10px 0 18px;
}

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

[data-nav][data-open] { animation: navDrop .22s ease-out both; }

@keyframes navDrop {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

.nav-caption {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin: 0;
  padding: 8px var(--gutter) 10px;
  font-size: .68rem;
  letter-spacing: .18em;
  color: var(--line);
}
.nav-caption-num { color: var(--cyan-deep); letter-spacing: .06em; }

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

.nav-item a {
  display: grid;
  grid-template-columns: 30px 1fr;
  align-items: baseline;
  padding: 12px var(--gutter);
  border-left: 2px solid transparent;
  color: var(--muted);
  font-size: .95rem;
  transition: color .18s ease, border-color .18s ease, background-color .18s ease;
}

.nav-item a:hover {
  color: var(--paper);
  background: rgba(35, 230, 208, .07);
  border-left-color: rgba(35, 230, 208, .45);
}

.nav-item a[aria-current="page"] {
  color: var(--paper);
  border-left-color: var(--cyan);
  background: linear-gradient(90deg, rgba(35, 230, 208, .16), rgba(35, 230, 208, 0));
}

.nav-num { font-size: .68rem; color: var(--cyan-deep); }
.nav-item a[aria-current="page"] .nav-num { color: var(--cyan); }
.nav-label { font-weight: 600; }

.nav-foot { display: none; }

.header-scale { display: none; }

/* ---------- footer ---------- */
.site-footer {
  position: relative;
  border-top: 1px solid var(--hair);
  background: linear-gradient(180deg, var(--ink-2), var(--ink) 70%);
}

.footer-scale {
  height: 9px;
  border-bottom: 1px solid var(--hair-soft);
  background-image: repeating-linear-gradient(to right, rgba(169, 186, 196, .45) 0 1px, transparent 1px 28px);
  background-size: 100% 6px;
  background-repeat: no-repeat;
  background-position: 0 0;
}

.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(36px, 5vw, 64px) var(--gutter) clamp(28px, 4vw, 48px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.footer-col { min-width: 0; }

.footer-brand {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.22rem;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--paper);
}

.footer-version {
  margin: 0 0 10px;
  font-size: .8rem;
  color: var(--muted);
}
.footer-version .num { color: var(--cyan); }

.footer-note {
  margin: 0 0 12px;
  font-size: .84rem;
  line-height: 1.7;
  color: var(--muted);
  max-width: 34em;
}

.footer-stat {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--hair-soft);
  font-size: .8rem;
  color: var(--line);
}
.footer-stat .num { color: var(--window); }

.footer-title {
  margin: 0 0 14px;
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--line);
  text-transform: uppercase;
}

.footer-list { display: flex; flex-direction: column; gap: 9px; }

.footer-list li {
  position: relative;
  font-size: .88rem;
  color: var(--muted);
}

.footer-list a {
  color: var(--muted);
  transition: color .16s ease, padding-left .16s ease;
}
.footer-list a::before {
  content: "";
  display: inline-block;
  width: 0;
  height: 1px;
  margin-right: 0;
  vertical-align: middle;
  background: var(--cyan);
  transition: width .16s ease, margin-right .16s ease;
}
.footer-list a:hover { color: var(--paper); }
.footer-list a:hover::before { width: 12px; margin-right: 8px; }

.footer-list--plain span { color: var(--muted); font-size: .84rem; word-break: break-all; }

.footer-addr {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--hair-soft);
  font-size: .82rem;
  line-height: 1.7;
  color: var(--line);
}

.footer-base {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 16px var(--gutter) 30px;
  border-top: 1px solid var(--hair-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  align-items: baseline;
  justify-content: space-between;
}

.footer-copy, .footer-tip {
  margin: 0;
  font-size: .78rem;
  color: var(--line);
}
.footer-copy .num { color: var(--muted); }
.footer-tip .num { color: var(--stoppage); }

/* ---------- layout helpers ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section { padding: clamp(48px, 8vw, 104px) 0; }
.section + .section { border-top: 1px solid var(--hair-soft); }

.section-head { display: grid; gap: 10px; max-width: 46em; margin-bottom: clamp(24px, 4vw, 44px); }

.eyebrow {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0;
  font-size: .72rem;
  letter-spacing: .2em;
  color: var(--line);
  text-transform: uppercase;
}

.sec-num { font-size: .78rem; color: var(--cyan); letter-spacing: .08em; }

.display {
  font-size: clamp(2.1rem, 5.4vw, 4.2rem);
  font-weight: 800;
  letter-spacing: -.02em;
  text-transform: uppercase;
}

.lead {
  margin: 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--muted);
  max-width: 40em;
}

.grid { display: grid; gap: 1px; }
.grid--2 { grid-template-columns: 1fr; }
.grid--3 { grid-template-columns: 1fr; }
.grid--4 { grid-template-columns: 1fr; }

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

.slant-band {
  height: 56px;
  background: linear-gradient(90deg, rgba(35, 230, 208, .18), rgba(124, 92, 255, 0) 60%);
  clip-path: polygon(0 0, 100% 34%, 100% 100%, 0 66%);
}

.stack { display: flex; flex-direction: column; gap: 16px; }
.cluster { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }

/* ---------- breadcrumbs ---------- */
.crumbs { padding: 20px 0 0; }
.crumbs ol { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-size: .78rem; color: var(--line); }
.crumbs li + li::before { content: "/"; margin-right: 8px; color: var(--hair); }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--cyan); }
.crumbs [aria-current="page"] { color: var(--paper); }

/* ---------- cards ---------- */
.card,
.data-card {
  position: relative;
  padding: 20px 22px 24px;
  background: var(--ink-2);
  border: 1px solid var(--hair);
  border-radius: 0;
}

.data-card { border-top: 2px solid var(--cyan); }

.card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 12px;
}

.card-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.06rem;
  font-weight: 700;
  letter-spacing: -.01em;
}

.card-body { font-size: .9rem; line-height: 1.75; color: var(--muted); }

.tag {
  display: inline-block;
  padding: 3px 9px;
  border: 1px solid var(--hair);
  font-size: .7rem;
  letter-spacing: .08em;
  color: var(--muted);
  border-radius: 0;
}
.tag--cyan { border-color: var(--cyan-deep); color: var(--cyan); background: rgba(35, 230, 208, .08); }
.tag--stoppage { border-color: var(--stoppage); color: var(--stoppage); background: rgba(255, 90, 43, .1); }
.tag--amber { border-color: var(--window); color: var(--window); background: rgba(255, 176, 58, .1); }
.tag--violet { border-color: var(--violet); color: var(--violet); background: rgba(124, 92, 255, .12); }

/* ---------- kpi ---------- */
.kpi {
  padding: 18px 20px;
  border: 1px solid var(--hair);
  background: linear-gradient(180deg, var(--ink-3), var(--ink-2));
}

.kpi-num {
  display: block;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
}

.kpi-unit { font-size: .82rem; color: var(--muted); margin-left: 6px; }
.kpi-label { display: block; margin-top: 10px; font-size: .76rem; letter-spacing: .12em; color: var(--line); }
.kpi--accent .kpi-num { color: var(--cyan); }
.kpi--alert .kpi-num { color: var(--stoppage); }

/* ---------- prose ---------- */
.prose {
  max-width: 40em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--muted);
}
.prose h2, .prose h3 { color: var(--paper); margin-top: 1.6em; }
.prose strong { color: var(--paper); }
.prose a { border-bottom: 1px solid var(--cyan-deep); }
.prose ul { display: grid; gap: 8px; margin: 0 0 1.2em; }
.prose ul li { position: relative; padding-left: 18px; }
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

/* ---------- media ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--hair);
  background:
    linear-gradient(135deg, var(--ink-2), var(--ink) 55%, var(--ink-2));
}
.media::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(35, 230, 208, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(35, 230, 208, .07) 1px, transparent 1px);
  background-size: 34px 34px;
  pointer-events: none;
}
.media::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 30px;
  height: 2px;
  background: var(--cyan);
  z-index: 2;
}
.media img { position: relative; z-index: 1; width: 100%; height: 100%; object-fit: cover; }

.media--21x9 { aspect-ratio: 21 / 9; }
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }

.media-cap {
  margin: 10px 0 0;
  font-size: .76rem;
  letter-spacing: .04em;
  color: var(--line);
}

/* ---------- reveal ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .55s cubic-bezier(.22, .7, .3, 1), transform .55s cubic-bezier(.22, .7, .3, 1);
}
html.js [data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- tablet ---------- */
@media (min-width: 620px) {
  .bar-version { display: flex; gap: 6px; align-items: baseline; margin-left: 10px; }
  .nav-toggle-text { display: inline; }
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 36px; }
}

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

/* ---------- desktop : left rail frame ---------- */
@media (min-width: 1100px) {
  body { padding-top: 0; padding-left: var(--rail-w); }

  .skip-link { left: calc(var(--rail-w) + 16px); }

  .site-header {
    top: 0;
    left: 0;
    right: auto;
    bottom: 0;
    width: var(--rail-w);
    display: flex;
    flex-direction: column;
    padding: 26px 0 22px;
    border-bottom: 0;
    border-right: 1px solid var(--hair);
    background: linear-gradient(180deg, #080D12, var(--ink) 65%);
  }

  .header-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    height: auto;
    padding: 0 22px 20px;
    border-bottom: 1px solid var(--hair-soft);
  }

  .header-bar::after { display: none; }

  .bar-name { font-size: 1.15rem; }

  .bar-version {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-left: 0;
    font-size: .7rem;
  }
  .bar-num { margin-left: 0; }

  .bar-cta, .nav-toggle { display: none; }

  .site-nav {
    display: flex;
    flex-direction: column;
    flex: 0 0 auto;
    max-height: none;
    overflow: visible;
    border-top: 0;
    background: transparent;
    padding: 18px 12px 0;
  }

  [data-nav][data-open] { animation: none; }

  .nav-caption { padding: 0 8px 10px; }

  .nav-item a { padding: 11px 12px; font-size: .93rem; }
  .nav-item a:hover { background: rgba(35, 230, 208, .06); }

  .nav-foot {
    display: grid;
    gap: 10px;
    margin-top: 18px;
    padding: 16px 8px 0;
    border-top: 1px solid var(--hair-soft);
  }

  .nav-note {
    margin: 0 0 4px;
    font-size: .72rem;
    line-height: 1.6;
    color: var(--line);
  }
  .nav-note .num { color: var(--window); }

  .header-scale {
    display: block;
    flex: 1 1 auto;
    min-height: 60px;
    margin: 22px 22px 0;
    position: relative;
    border-left: 1px solid var(--hair);
    background-image: repeating-linear-gradient(to bottom, rgba(108, 127, 140, .5) 0 1px, transparent 1px 15px);
    background-size: 13px 100%;
    background-repeat: no-repeat;
    background-position: left top;
  }

  .header-scale::after {
    content: "";
    position: absolute;
    left: -1px;
    top: 0;
    width: 2px;
    height: calc(var(--scroll) * 1%);
    background: linear-gradient(180deg, var(--cyan), var(--stoppage));
  }

  .footer-inner { grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 44px; }
  .footer-col--brand { padding-right: 20px; }
}

/* ---------- 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;
  }

  html.js [data-reveal] { opacity: 1; transform: none; }
  .header-bar::after, .header-scale::after { transition: none !important; }
}