/* ==========================================================================
   beat365体育 · 共享样式表 /assets/site.css
   夜穹深蓝 + 琥珀橙 · 侧边轨道导航 · 档案卡体系
   ========================================================================== */

/* ---------------------------------------------------------------
   01 · RESET
   --------------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

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

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

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

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

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

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

main { display: block; min-height: 60vh; }

/* ---------------------------------------------------------------
   02 · TOKENS
   --------------------------------------------------------------- */
:root {
  /* 色板 */
  --night: #070C1B;
  --layer: #0E1730;
  --line: #16234A;
  --amber: #F5A524;
  --amber-soft: #FFC96B;
  --gain: #23E0B0;
  --warn: #FF5A5F;
  --ink: #E9EEF8;
  --muted: #8A97B5;
  --teal: #2A9D8F;

  /* 字体 */
  --font-display: "Arial Narrow", "Helvetica Neue Condensed",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-data: ui-monospace, "SFMono-Regular", "Cascadia Mono", "Roboto Mono",
    Menlo, Consolas, "Liberation Mono", monospace;

  /* 度量 */
  --rail-w: 88px;
  --ticks-w: 24px;
  --row-h: 62px;
  --content-max: 1160px;
  --r-s: 3px;
  --r-m: 6px;
  --sp-1: 8px;
  --sp-2: 16px;
  --sp-3: 24px;
  --sp-4: 32px;
  --sp-5: 48px;
  --sp-6: 96px;

  /* 动效 */
  --ease: cubic-bezier(.2, .8, .2, 1);
  --dur: 180ms;

  /* 层级 */
  --z-rail: 60;
  --z-skip: 200;

  --shadow-card: 0 18px 40px -28px rgba(0, 0, 0, .92);
}

::selection {
  background: var(--amber);
  color: #08101F;
}

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

/* ---------------------------------------------------------------
   03 · BASE
   --------------------------------------------------------------- */
body {
  background-color: var(--night);
  background-image:
    radial-gradient(900px 620px at 88% -8%, rgba(245, 165, 36, .10), transparent 62%),
    radial-gradient(760px 540px at 2% 104%, rgba(35, 224, 176, .07), transparent 66%),
    linear-gradient(180deg, #070C1B 0%, #050912 100%);
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  min-height: 100vh;
  padding-left: calc(var(--rail-w) + var(--ticks-w));
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 刻度尺：轨道与内容之间的一条经幡节奏刻度 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  bottom: 0;
  left: var(--rail-w);
  width: var(--ticks-w);
  z-index: 0;
  pointer-events: none;
  border-right: 1px solid rgba(22, 35, 74, .45);
  background-image:
    repeating-linear-gradient(to bottom,
      rgba(22, 35, 74, .95) 0 1px,
      rgba(22, 35, 74, 0) 1px 20px);
  background-repeat: repeat-y;
  background-size: 14px 100%;
  background-position: left top;
}

time,
.data-num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------------------------------------------------------------
   04 · LAYOUT
   --------------------------------------------------------------- */
.container {
  --pad: clamp(16px, 4vw, 32px);
  width: min(100% - (var(--pad) * 2), var(--content-max));
  margin-inline: auto;
}

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

/* 框景容器：四角琥珀橙刻度 */
.frame {
  position: relative;
  padding: var(--sp-4);
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  background-color: rgba(10, 17, 34, .55);
  background-image:
    linear-gradient(var(--amber), var(--amber)),
    linear-gradient(var(--amber), var(--amber)),
    linear-gradient(var(--amber), var(--amber)),
    linear-gradient(var(--amber), var(--amber)),
    linear-gradient(var(--amber), var(--amber)),
    linear-gradient(var(--amber), var(--amber)),
    linear-gradient(var(--amber), var(--amber)),
    linear-gradient(var(--amber), var(--amber));
  background-repeat: no-repeat;
  background-size:
    14px 2px, 2px 14px,
    14px 2px, 2px 14px,
    14px 2px, 2px 14px,
    14px 2px, 2px 14px;
  background-position:
    left top, left top,
    right top, right top,
    left bottom, left bottom,
    right bottom, right bottom;
}

/* ---------------------------------------------------------------
   05 · TYPOGRAPHY
   --------------------------------------------------------------- */
.eyebrow {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--amber);
}

.section-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 44px);
  line-height: 1.2;
  letter-spacing: .01em;
}

.sub-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 32px);
  line-height: 1.28;
}

.section-lede {
  margin-top: 12px;
  max-width: 62ch;
  font-size: 16px;
  color: var(--muted);
}

/* ---------------------------------------------------------------
   06 · COMPONENTS
   --------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  line-height: 1.2;
  white-space: nowrap;
  border: 1px solid transparent;
  border-radius: var(--r-s);
  transition: background-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}

.btn--primary {
  background: var(--amber);
  color: #0A0F1E;
}

.btn--primary:hover {
  background: var(--amber-soft);
}

.btn--ghost {
  background: rgba(14, 23, 48, .6);
  border-color: var(--line);
  color: var(--ink);
}

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

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .04em;
  line-height: 1.6;
  color: var(--muted);
  background: rgba(22, 35, 74, .7);
  border: 1px solid rgba(22, 35, 74, .95);
  border-radius: 999px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.tag:hover,
.tag[aria-pressed="true"] {
  color: var(--amber-soft);
  border-color: var(--amber);
}

.tag--gain {
  color: var(--gain);
  border-color: rgba(35, 224, 176, .42);
  background: rgba(35, 224, 176, .08);
}

.tag--warn {
  color: var(--warn);
  border-color: rgba(255, 90, 95, .42);
  background: rgba(255, 90, 95, .08);
}

.card {
  position: relative;
  padding: var(--sp-3);
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  background-image: linear-gradient(180deg, rgba(14, 23, 48, .92), rgba(10, 17, 34, .96));
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: var(--shadow-card);
  transition: border-color var(--dur) var(--ease),
              transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}

.card:hover {
  border-color: var(--amber);
  transform: scale(1.02);
}

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

.card-title {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
}

.card-meta {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: .02em;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--muted);
}

.breadcrumb a {
  color: var(--muted);
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.breadcrumb a:hover {
  color: var(--amber-soft);
  border-bottom-color: var(--amber);
}

/* 媒体容器（页面阶段放入 img / svg） */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  background-color: var(--layer);
}

.media > img,
.media > svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--pitch {
  background-image:
    repeating-linear-gradient(90deg, rgba(35, 224, 176, .06) 0 18px, rgba(35, 224, 176, 0) 18px 36px),
    linear-gradient(155deg, #0E1730 0%, #070C1B 78%);
}

.media--tally {
  background-image:
    repeating-linear-gradient(0deg, rgba(245, 165, 36, .09) 0 2px, rgba(245, 165, 36, 0) 2px 14px),
    linear-gradient(155deg, #0E1730 0%, #070C1B 78%);
}

.media-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* 复制按钮 */
.copy-chip {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  font-family: var(--font-data);
  font-size: 12.5px;
  letter-spacing: .01em;
  line-height: 1.6;
  color: var(--ink);
  background: rgba(14, 23, 48, .9);
  border: 1px solid var(--line);
  border-radius: var(--r-s);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.copy-chip::after {
  content: "复制";
  flex: none;
  width: 48px;
  margin-left: 8px;
  font-size: 10px;
  letter-spacing: .06em;
  text-align: right;
  color: rgba(138, 151, 181, .7);
  transition: color var(--dur) var(--ease);
}

.copy-chip:hover {
  border-color: var(--amber);
  color: var(--amber-soft);
}

.copy-chip:hover::after {
  color: var(--amber);
}

.copy-chip[data-copied] {
  border-color: var(--gain);
}

.copy-chip[data-copied]::after {
  content: "已复制";
  color: var(--gain);
}

.copy-chip--ghost {
  color: var(--muted);
  border-color: rgba(22, 35, 74, .8);
  background: transparent;
}

.copy-chip--ghost:hover {
  color: var(--amber-soft);
}

/* ---------------------------------------------------------------
   07 · HEADER / 侧边轨道
   --------------------------------------------------------------- */
.site-header {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--rail-w);
  z-index: var(--z-rail);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: var(--sp-3);
  padding: 20px 0 18px;
  background: linear-gradient(180deg, #0B1226 0%, #070C1B 55%, #060A15 100%);
  border-right: 1px solid var(--line);
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 50%;
  z-index: var(--z-skip);
  transform: translate(-50%, -180%);
  padding: 10px 18px;
  font-size: 13px;
  font-weight: 700;
  color: #0A0F1E;
  background: var(--amber);
  border-radius: var(--r-s);
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translate(-50%, 0);
}

.rail-brand {
  padding: 0 8px;
  text-align: center;
}

.brand { display: block; }

.brand-line {
  display: block;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .06em;
  line-height: 1.25;
  color: var(--ink);
}

.brand-line--accent {
  color: var(--amber);
  letter-spacing: .28em;
}

.brand-sub {
  display: block;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
  font-size: 9px;
  line-height: 1.55;
  letter-spacing: .02em;
  color: var(--muted);
}

.nav-toggle { display: none; }

.site-nav {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  scrollbar-width: thin;
}

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

.nav-list li + li { border-top: 1px solid rgba(22, 35, 74, .55); }

.nav-link {
  position: relative;
  display: block;
  padding: 12px 6px;
  text-align: center;
  color: var(--muted);
  transition: color var(--dur) var(--ease),
              background-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}

.nav-index {
  display: block;
  font-family: var(--font-data);
  font-size: 10px;
  line-height: 1;
  letter-spacing: .08em;
  color: rgba(138, 151, 181, .55);
  transition: color var(--dur) var(--ease);
}

.nav-label {
  display: block;
  margin-top: 5px;
  font-size: 12.5px;
  font-weight: 500;
  line-height: 1.35;
}

.nav-link:hover {
  color: var(--amber-soft);
  background: rgba(245, 165, 36, .07);
}

.nav-link:hover .nav-index { color: var(--amber); }

.nav-link[aria-current="page"] {
  color: var(--amber);
  background: rgba(245, 165, 36, .12);
  box-shadow: inset -2px 0 0 var(--amber);
}

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

.rail-foot {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 0 8px;
  text-align: center;
}

.rail-pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gain);
  box-shadow: 0 0 0 3px rgba(35, 224, 176, .16);
}

.rail-state {
  font-size: 9.5px;
  line-height: 1.5;
  letter-spacing: .02em;
  color: var(--muted);
}

.rail-progress {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 2px;
  background: rgba(22, 35, 74, .85);
  pointer-events: none;
}

.rail-progress-fill {
  display: block;
  width: 100%;
  height: calc(var(--p, 0) * 1%);
  background: linear-gradient(180deg, var(--amber), var(--amber-soft));
  transition: height 120ms linear;
}

/* ---------------------------------------------------------------
   08 · FOOTER
   --------------------------------------------------------------- */
.site-footer {
  position: relative;
  margin-top: var(--sp-6);
  background: linear-gradient(180deg, #080E1E 0%, #060A15 100%);
  border-top: 1px solid var(--line);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 3px;
  opacity: .6;
  background: repeating-linear-gradient(90deg,
    var(--amber) 0 42px,
    var(--gain) 42px 84px,
    var(--line) 84px 126px);
}

.footer-shell {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) 2fr;
  gap: var(--sp-5);
  padding: var(--sp-5) 0 var(--sp-4);
}

.footer-mark {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: .02em;
  color: var(--ink);
}

.footer-tag {
  margin-top: 6px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

.footer-desc {
  margin-top: 16px;
  max-width: 34ch;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--sp-4);
}

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

.footer-title {
  margin-bottom: 14px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .12em;
  color: var(--amber);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  display: inline-block;
  width: fit-content;
  font-size: 14px;
  color: var(--muted);
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.footer-links a:hover {
  color: var(--amber-soft);
  border-bottom-color: var(--amber);
}

.footer-meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: var(--sp-3) 0 var(--sp-4);
  border-top: 1px solid var(--line);
}

.meta-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
}

.meta-key { color: rgba(138, 151, 181, .72); }
.meta-value { color: var(--ink); }
.meta-sep { color: var(--line); }

.meta-note {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .01em;
}

.meta-line--legal {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .02em;
}

/* 移动端导航开启时锁定背景滚动 */
body.is-nav-open { overflow: hidden; }

/* ---------------------------------------------------------------
   09 · RESPONSIVE
   --------------------------------------------------------------- */
@media (max-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  body {
    padding-left: 0;
    padding-top: var(--row-h);
    background-attachment: scroll;
    background-image:
      radial-gradient(620px 440px at 104% -10%, rgba(245, 165, 36, .11), transparent 62%),
      radial-gradient(540px 400px at -10% 104%, rgba(35, 224, 176, .07), transparent 66%),
      linear-gradient(180deg, #070C1B 0%, #050912 100%);
  }

  body::before { display: none; }

  html { scroll-padding-top: calc(var(--row-h) + 12px); }

  .site-header {
    inset: 0 0 auto 0;
    width: auto;
    height: var(--row-h);
    flex-direction: row;
    align-items: center;
    gap: 12px;
    padding: 0 14px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .rail-brand {
    padding: 0;
    margin-right: auto;
    text-align: left;
  }

  .brand {
    display: flex;
    align-items: baseline;
    gap: 5px;
  }

  .brand-line {
    display: inline;
    font-size: 15px;
    letter-spacing: .02em;
  }

  .brand-line--accent { letter-spacing: .02em; }

  .brand-sub { display: none; }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    font-size: 12.5px;
    color: var(--ink);
    border: 1px solid var(--line);
    border-radius: var(--r-s);
    transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
  }

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

  .nav-toggle-box {
    display: flex;
    flex-direction: column;
    gap: 3px;
    width: 16px;
  }

  .nav-toggle-box i {
    display: block;
    height: 2px;
    border-radius: 1px;
    background: var(--amber);
    transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-box i:nth-child(1) {
    transform: translateY(5px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-box i:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-box i:nth-child(3) {
    transform: translateY(-5px) rotate(-45deg);
  }

  .rail-progress {
    top: auto;
    left: 0;
    right: 0;
    bottom: 0;
    width: auto;
    height: 2px;
  }

  .rail-progress-fill {
    height: 100%;
    width: calc(var(--p, 0) * 1%);
    transition: width 120ms linear;
  }

  .site-nav {
    position: fixed;
    top: var(--row-h);
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--z-rail);
    flex: none;
    padding: 8px 16px 40px;
    overflow-y: auto;
    background: linear-gradient(180deg, #0A1122 0%, #070C1B 100%);
    border-top: 1px solid var(--line);
    border-bottom: 0;
    transform: translateX(-102%);
    visibility: hidden;
    transition: transform 220ms var(--ease), visibility 220ms var(--ease);
  }

  .site-nav[data-open] {
    transform: translateX(0);
    visibility: visible;
  }

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

  .nav-link {
    display: flex;
    align-items: baseline;
    gap: 14px;
    padding: 16px 4px;
    text-align: left;
  }

  .nav-index {
    display: inline-block;
    min-width: 24px;
    font-size: 11px;
  }

  .nav-label {
    margin-top: 0;
    font-size: 16px;
    font-weight: 600;
  }

  .nav-link[aria-current="page"] {
    padding-left: 14px;
    box-shadow: inset 3px 0 0 var(--amber);
  }

  .rail-foot { display: none; }

  .footer-shell {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--sp-4);
  }
}

@media (max-width: 640px) {
  :root { --sp-6: 64px; }

  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }

  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .footer-mark { font-size: 22px; }

  .frame { padding: var(--sp-3); }

  .card { padding: var(--sp-2) var(--sp-2); }
}

/* ---------------------------------------------------------------
   10 · REDUCED MOTION
   --------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}