/* =========================================================
   易贝体育主站 · 共享样式 /assets/site.css
   深空数据指挥台 · 锐利直角 · 精密网格 · 记分牌层级
   ========================================================= */

/* ---------- 1. 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, fieldset, legend { margin: 0; }

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

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

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

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

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

/* ---------- 2. 变量 ---------- */
:root {
  /* 色板 */
  --yb-void: #05090F;
  --yb-panel: #0B1420;
  --yb-elevated: #12213A;
  --yb-grid: #1E3A5C;
  --yb-ink: #E9F2FA;
  --yb-body-text: #C9D8E6;
  --yb-muted: #93A8BD;
  --yb-signal: #2FF3C0;
  --yb-signal-dim: #17A98A;
  --yb-action: #FF7A34;
  --yb-amber: #FFC24B;
  --yb-focus: #7BE9FF;

  /* 透明度衍生线 */
  --yb-line: rgba(30, 58, 92, 0.72);
  --yb-line-soft: rgba(30, 58, 92, 0.38);
  --yb-line-strong: rgba(30, 58, 92, 0.95);
  --yb-signal-a35: rgba(47, 243, 192, 0.35);
  --yb-signal-a12: rgba(47, 243, 192, 0.12);
  --yb-action-a30: rgba(255, 122, 52, 0.30);
  --yb-amber-a35: rgba(255, 194, 75, 0.35);
  --yb-void-a92: rgba(5, 9, 15, 0.96);

  /* 尺度 */
  --yb-gutter: clamp(1rem, 4vw, 2.5rem);
  --yb-max: 1240px;
  --yb-tap: 44px;
  --yb-radius: 0;

  /* 字体族 */
  --yb-font-display: "Noto Sans SC", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --yb-font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --yb-font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --yb-font-serif: "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
}

/* ---------- 3. 基底与中文排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--yb-void);
  background-image:
    linear-gradient(rgba(30, 58, 92, 0.20) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 58, 92, 0.20) 1px, transparent 1px);
  background-size: 96px 96px;
  background-position: -1px -1px;
  color: var(--yb-ink);
  font-family: var(--yb-font-body);
  font-size: 16px;
  line-height: 1.65;
  text-align: left;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--yb-signal);
  color: var(--yb-void);
}

a,
button,
[data-toc-link],
[data-totop] { -webkit-tap-highlight-color: transparent; }

a { text-decoration-skip-ink: none; }

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

/* ---------- 4. 布局工具 ---------- */
.yb-wrap {
  width: min(var(--yb-max), calc(100% - var(--yb-gutter) * 2));
  margin-inline: auto;
}

.yb-section {
  padding-block: clamp(2.25rem, 6vw, 4.5rem);
}

.yb-section--panel { background: var(--yb-panel); }

.yb-section--rule { border-top: 1px solid var(--yb-line-soft); }

.yb-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(1rem, 2.2vw, 1.75rem);
}

/* ---------- 5. 排版件 ---------- */
.yb-h1,
.yb-h2,
.yb-h3 {
  font-family: var(--yb-font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--yb-ink);
  text-wrap: balance;
}

.yb-h1 { font-size: clamp(2.2rem, 6vw, 5.5rem); }
.yb-h2 { font-size: clamp(1.7rem, 3.4vw, 2.7rem); }
.yb-h3 { font-size: clamp(1.15rem, 1.8vw, 1.5rem); line-height: 1.3; }

.yb-eyebrow {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--yb-font-serif);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--yb-muted);
}

.yb-eyebrow::before {
  content: "";
  flex: none;
  width: 18px;
  height: 1px;
  background: var(--yb-signal-dim);
}

.yb-num {
  font-family: var(--yb-font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.yb-lede {
  max-width: 34em;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--yb-muted);
}

.yb-prose {
  max-width: 34em;
  color: var(--yb-body-text);
}

.yb-prose > * + * { margin-top: 1.05em; }

.yb-prose p,
.yb-prose li { line-height: 1.7; }

/* ---------- 6. 按钮 ---------- */
.yb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: var(--yb-tap);
  padding: 0.6rem 1.1rem;
  font-family: var(--yb-font-display);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.2;
  text-align: center;
  color: var(--yb-ink);
  background: transparent;
  border: 1px solid var(--yb-line);
  border-radius: var(--yb-radius);
  cursor: pointer;
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.yb-btn--signal {
  background: var(--yb-signal);
  border-color: var(--yb-signal);
  color: #04140F;
}

.yb-btn--signal:hover {
  background: var(--yb-signal-dim);
  border-color: var(--yb-signal-dim);
}

.yb-btn--action {
  background: var(--yb-action);
  border-color: var(--yb-action);
  color: #14060A;
}

.yb-btn--action:hover {
  background: #FF8F52;
  border-color: #FF8F52;
}

.yb-btn--ghost {
  border-color: var(--yb-signal-a35);
  color: var(--yb-signal);
}

.yb-btn--ghost:hover {
  background: var(--yb-signal-a12);
  border-color: var(--yb-signal);
}

/* ---------- 7. 标签与面包屑 ---------- */
.yb-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.5rem;
  font-family: var(--yb-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  line-height: 1.4;
  color: var(--yb-muted);
  border: 1px solid var(--yb-line);
  border-radius: var(--yb-radius);
  white-space: nowrap;
}

.yb-tag--signal { color: var(--yb-signal); border-color: var(--yb-signal-a35); }
.yb-tag--action { color: var(--yb-action); border-color: var(--yb-action-a30); }
.yb-tag--amber  { color: var(--yb-amber);  border-color: var(--yb-amber-a35); }

.yb-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--yb-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  color: var(--yb-muted);
}

.yb-crumbs__item { color: var(--yb-muted); }

a.yb-crumbs__item:hover { color: var(--yb-signal); }

.yb-crumbs__sep { color: var(--yb-signal-dim); }

/* ---------- 8. 图片容器（页面阶段放置图片） ---------- */
.yb-media {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--yb-line);
  border-radius: var(--yb-radius);
  background:
    linear-gradient(140deg, var(--yb-elevated) 0%, var(--yb-panel) 58%, var(--yb-void) 100%);
}

.yb-media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(30, 58, 92, 0.55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 58, 92, 0.55) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.55;
  pointer-events: none;
}

.yb-media > img,
.yb-media > picture > img,
.yb-media > video {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.yb-media__scrim {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(5, 9, 15, 0.05) 0%, rgba(5, 9, 15, 0.88) 100%);
}

.yb-media__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 3;
  padding: 0.75rem 1rem;
  font-family: var(--yb-font-serif);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--yb-muted);
}

/* ---------- 9. 跳跃链接 ---------- */
.yb-skip {
  position: absolute;
  top: 0;
  left: var(--yb-gutter);
  z-index: 120;
  padding: 0.6rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--yb-void);
  background: var(--yb-signal);
  transform: translateY(-160%);
  transition: transform 0.16s ease;
}

.yb-skip:focus { transform: translateY(0); }

/* ---------- 10. 头部 ---------- */
.yb-header {
  position: relative;
  z-index: 40;
}

.yb-header__mast {
  background: var(--yb-panel);
  border-bottom: 1px solid var(--yb-line);
}

.yb-header__mast-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.75rem;
  padding-block: 0.7rem;
}

.yb-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  min-height: var(--yb-tap);
}

.yb-brand__mark {
  position: relative;
  flex: none;
  width: 26px;
  height: 26px;
  border: 1px solid var(--yb-signal-dim);
}

.yb-brand__mark::after {
  content: "";
  position: absolute;
  inset: 8px;
  background: var(--yb-signal);
  transition: inset 0.2s ease;
}

.yb-brand:hover .yb-brand__mark::after { inset: 4px; }

.yb-brand__text { display: block; }

.yb-brand__line {
  display: block;
  font-family: var(--yb-font-display);
  font-size: 0.96rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--yb-ink);
}

.yb-brand__sub {
  display: block;
  font-family: var(--yb-font-serif);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  line-height: 1.4;
  color: var(--yb-muted);
}

.yb-header__aside {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem clamp(0.75rem, 2vw, 1.5rem);
}

.yb-status {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.28rem 0.55rem;
  font-family: var(--yb-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  line-height: 1.4;
  color: var(--yb-signal);
  border: 1px solid var(--yb-signal-a35);
  white-space: nowrap;
}

.yb-status__dot {
  flex: none;
  width: 6px;
  height: 6px;
  background: var(--yb-signal);
  animation: yb-beat 15s linear infinite;
}

.yb-status__text { color: var(--yb-signal); }

@keyframes yb-beat {
  0%, 92% { opacity: 1; }
  93%, 100% { opacity: 0.18; }
}

.yb-util {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem clamp(0.5rem, 1.6vw, 1.1rem);
}

.yb-util__link {
  padding-block: 0.25rem;
  font-size: 0.82rem;
  line-height: 1.4;
  color: var(--yb-muted);
  border-bottom: 1px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.yb-util__link:hover,
.yb-util__link:focus-visible {
  color: var(--yb-ink);
  border-bottom-color: var(--yb-signal);
}

/* --- 吸附层 --- */
.yb-header__stick {
  position: relative;
  z-index: 35;
  background: var(--yb-void-a92);
  border-bottom: 1px solid var(--yb-line);
}

.yb-header[data-stuck="true"] .yb-header__stick {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
}

.yb-navbar__inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 58px;
}

.yb-nav { flex: 1 1 auto; min-width: 0; }

.yb-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: clamp(0.35rem, 1.8vw, 1.6rem);
}

.yb-nav__item { display: flex; }

.yb-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.95rem 0;
  font-family: var(--yb-font-display);
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.3;
  color: var(--yb-muted);
  border-bottom: 2px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.yb-nav__index {
  font-family: var(--yb-font-mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--yb-signal-dim);
}

.yb-nav__link:hover {
  color: var(--yb-ink);
  border-bottom-color: var(--yb-signal-dim);
}

.yb-nav__link[aria-current="page"] {
  color: var(--yb-ink);
  border-bottom-color: var(--yb-signal);
}

.yb-nav__link[aria-current="page"] .yb-nav__index { color: var(--yb-signal); }

.yb-navbar__meta {
  margin-left: auto;
  font-family: var(--yb-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  color: var(--yb-muted);
  white-space: nowrap;
}

.yb-nav__toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  min-height: var(--yb-tap);
  padding-right: 0.4rem;
  font-family: var(--yb-font-display);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--yb-ink);
  cursor: pointer;
}

.yb-nav__bars {
  display: grid;
  gap: 4px;
  width: 20px;
}

.yb-nav__bars span {
  display: block;
  height: 1px;
  background: var(--yb-signal);
  transition: transform 0.18s ease;
}

.yb-header__stick[data-open="true"] .yb-nav__bars span:first-child {
  transform: translateY(2.5px) rotate(45deg);
}

.yb-header__stick[data-open="true"] .yb-nav__bars span:last-child {
  transform: translateY(-2.5px) rotate(-45deg);
}

.yb-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  overflow: hidden;
  pointer-events: none;
}

.yb-progress__bar {
  display: block;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--yb-signal-dim) 0%, var(--yb-signal) 100%);
  transform: scaleX(0);
  transform-origin: 0 50%;
}

/* ---------- 11. 目录跟随（页面阶段使用） ---------- */
[data-toc-link] { color: var(--yb-muted); }

[data-toc-link][aria-current="true"] { color: var(--yb-signal); }

/* ---------- 12. 页脚 ---------- */
.yb-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(3rem, 8vw, 6rem);
  background: var(--yb-panel);
  border-top: 1px solid var(--yb-line);
}

.yb-footer__top {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) 2.4fr;
  gap: clamp(1.75rem, 5vw, 4rem);
  padding-block: clamp(2.25rem, 5vw, 3.5rem);
}

.yb-footer__brand-line {
  max-width: 22em;
  font-family: var(--yb-font-display);
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.55;
  color: var(--yb-ink);
}

.yb-footer__brand .yb-btn { margin-top: 1.1rem; }

.yb-footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1.25rem, 3vw, 2.5rem);
}

.yb-footer__title {
  margin-bottom: 0.85rem;
  font-family: var(--yb-font-serif);
  font-size: 0.74rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--yb-signal-dim);
}

.yb-footer__list {
  display: grid;
  gap: 0.45rem;
}

.yb-footer__link {
  display: inline-block;
  padding-bottom: 1px;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--yb-muted);
  border-bottom: 1px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.yb-footer__link:hover {
  color: var(--yb-ink);
  border-bottom-color: var(--yb-signal);
}

.yb-footer__contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(200px, 100%), 1fr));
  gap: 1rem 2rem;
  padding-block: 1.2rem;
  border-top: 1px solid var(--yb-line);
  border-bottom: 1px solid var(--yb-line);
}

.yb-footer__contact > div { min-width: 0; }

.yb-footer__contact dt {
  font-family: var(--yb-font-serif);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--yb-muted);
}

.yb-footer__contact dd {
  margin-top: 0.25rem;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--yb-ink);
  overflow-wrap: anywhere;
}

.yb-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.5rem;
  padding-block: 1.1rem 1.6rem;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--yb-muted);
}

.yb-footer__icp {
  font-family: var(--yb-font-mono);
  letter-spacing: 0.02em;
  color: var(--yb-ink);
}

.yb-footer__note {
  margin-left: auto;
  font-family: var(--yb-font-serif);
  letter-spacing: 0.08em;
}

/* ---------- 13. 返回顶部 ---------- */
.yb-totop {
  position: fixed;
  right: clamp(0.75rem, 2.5vw, 1.75rem);
  bottom: clamp(0.75rem, 2.5vw, 1.75rem);
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: var(--yb-tap);
  padding: 0.5rem 0.85rem;
  font-family: var(--yb-font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--yb-signal);
  background: var(--yb-elevated);
  border: 1px solid var(--yb-signal-a35);
  cursor: pointer;
  transition: background-color 0.18s ease;
}

.yb-totop::before {
  content: "";
  width: 7px;
  height: 7px;
  border-top: 1px solid currentColor;
  border-left: 1px solid currentColor;
  transform: rotate(45deg) translate(1px, 1px);
}

.yb-totop:hover { background: var(--yb-signal-a12); }

.yb-totop[hidden] { display: none; }

/* ---------- 14. 入场显现 ---------- */
.yb-reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.38s ease, transform 0.38s ease;
}

.yb-reveal.is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1024px) {
  .yb-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

@media (max-width: 960px) {
  .yb-nav__toggle { display: inline-flex; }

  .yb-nav {
    display: none;
    flex: 1 0 100%;
    order: 3;
  }

  .yb-header__stick[data-open="true"] .yb-nav { display: block; }

  .yb-navbar__inner {
    flex-wrap: wrap;
    padding-block: 0.35rem 0.5rem;
  }

  .yb-nav__list {
    flex-direction: column;
    gap: 0;
    padding-bottom: 0.5rem;
  }

  .yb-nav__item { display: block; }

  .yb-nav__link {
    display: flex;
    width: 100%;
    padding: 0.85rem 0.25rem;
    font-size: 0.98rem;
    border-bottom: 1px solid var(--yb-line-soft);
  }

  .yb-nav__link:hover { border-bottom-color: var(--yb-signal-dim); }

  .yb-nav__link[aria-current="page"] { border-bottom-color: var(--yb-signal); }

  .yb-navbar__meta { display: none; }

  .yb-footer__top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 640px) {
  body { font-size: 15.5px; }

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

  .yb-header__mast-inner { padding-block: 0.6rem; }

  .yb-brand__sub { font-size: 0.68rem; letter-spacing: 0.06em; }

  .yb-header__aside {
    width: 100%;
    justify-content: space-between;
  }

  .yb-util { display: none; }

  .yb-footer__cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem 1.25rem;
  }

  .yb-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }

  .yb-footer__note { margin-left: 0; }
}

/* ---------- 16. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .yb-reveal {
    opacity: 1;
    transform: none;
  }
}