/* =========================================================
   BB体育 · 夜间球场数据舱 · 共享样式 /assets/site.css
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 150px;
}

body,
h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, address { margin: 0; }

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

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

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

a { color: inherit; }

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

/* ---------- tokens ---------- */
:root {
  --ink-deep: #06231C;
  --ink-hull: #0E3B2E;
  --line-moss: #2F5D4C;
  --paper: #F2EBDC;
  --paper-dim: #DFD4BE;
  --glow: #35F2C8;
  --ember: #FF8A3D;
  --mist: #8FA79C;
  --ink-black: #101A16;
  --violet: #6E6A8F;

  --font-display: "Noto Sans SC Condensed", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --wrap: 1360px;
  --gutter: 24px;
  --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
  --hair: rgba(47, 93, 76, 0.6);
  --hair-paper: rgba(242, 235, 220, 0.16);
}

/* ---------- base ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink-deep);
  background-image:
    radial-gradient(760px 460px at 84% -10%, rgba(53, 242, 200, 0.06), transparent 70%),
    radial-gradient(620px 420px at 2% 10%, rgba(110, 106, 143, 0.09), transparent 72%);
  background-repeat: no-repeat;
  background-attachment: fixed;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  letter-spacing: 0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

:focus-visible {
  outline: 2px solid var(--glow);
  outline-offset: 3px;
}

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 400;
  padding: 10px 18px;
  background: var(--glow);
  color: var(--ink-black);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, 100% 62%, 92% 100%, 0 100%);
  transform: translateY(-200%);
  transition: transform 200ms var(--ease-out);
}
.skip-link:focus-visible { transform: translateY(0); }

/* =========================================================
   页头
   ========================================================= */
.bay-header {
  position: relative;
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(180deg, #072a21 0%, var(--ink-deep) 100%);
  border-bottom: 1px solid var(--hair);
}

.bay-header::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(53, 242, 200, 0.07) 1px, transparent 1.6px);
  background-size: 24px 24px;
  opacity: 0.7;
}

.scroll-scan {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  z-index: 2;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--glow), var(--ember));
  will-change: transform;
}

/* 索引带 */
.index-strip {
  position: relative;
  z-index: 1;
  border-bottom: 1px solid var(--hair);
  background: rgba(14, 59, 46, 0.55);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
}

.index-strip__inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 7px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.index-strip__ticker {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex: 1 1 auto;
}

.index-strip__dot {
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--glow);
  box-shadow: 0 0 10px rgba(53, 242, 200, 0.8);
}

.index-strip__viewport {
  display: block;
  min-width: 0;
  width: min(380px, 46vw);
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 90%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 90%, transparent);
}

.index-strip__track {
  display: inline-flex;
  white-space: nowrap;
  animation: stripRun 30s linear infinite;
}

.index-strip__item { padding-right: 4em; }

@keyframes stripRun {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.index-strip__meta {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--mist);
}

.index-strip__sep { color: var(--line-moss); }

/* 刊头 */
.masthead {
  position: relative;
  z-index: 1;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 26px var(--gutter) 18px;
  text-align: center;
}

.masthead::before,
.masthead::after {
  content: "";
  position: absolute;
  top: 54%;
  width: clamp(40px, 12vw, 158px);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-moss));
  pointer-events: none;
}
.masthead::before { left: var(--gutter); }
.masthead::after { right: var(--gutter); transform: scaleX(-1); }

.masthead__brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
  color: var(--paper);
}

.masthead__mark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 6vw, 58px);
  line-height: 0.9;
  letter-spacing: -0.045em;
  color: var(--paper);
}

.masthead__word {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(18px, 3.2vw, 32px);
  line-height: 1;
  letter-spacing: 0.28em;
  padding-left: 2px;
}

.masthead__deck {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist);
}

/* 栏目条 */
.berth-nav {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--hair);
}

.berth-nav__inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.nav-trigger {
  display: none;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  cursor: pointer;
  text-align: left;
}

.nav-trigger__text {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.26em;
  color: var(--paper);
}

.nav-trigger__sign {
  position: relative;
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}
.nav-trigger__sign::before,
.nav-trigger__sign::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1.5px;
  background: var(--glow);
  transition: transform 200ms var(--ease-out);
}
.nav-trigger__sign::after { transform: rotate(90deg); }
.berth-nav[data-open] .nav-trigger__sign::after { transform: rotate(0deg); }

.nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(6px, 3vw, 42px);
}

.nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 13px 2px 15px;
  color: var(--mist);
  font-size: 15px;
  letter-spacing: 0.15em;
  text-decoration: none;
  transition: color 180ms var(--ease-out);
}

.nav__num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--line-moss);
  transition: color 180ms var(--ease-out);
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 8px;
  height: 1px;
  background: var(--glow);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 180ms var(--ease-out);
}

.nav__link:hover,
.nav__link:focus-visible { color: var(--paper); }
.nav__link:hover .nav__num,
.nav__link:focus-visible .nav__num { color: var(--mist); }

.nav__link[aria-current="page"] { color: var(--glow); }
.nav__link[aria-current="page"] .nav__num { color: var(--glow); }
.nav__link[aria-current="page"]::after { transform: scaleX(1); }

/* =========================================================
   页脚
   ========================================================= */
.bay-footer {
  position: relative;
  background: var(--ink-deep);
  border-top: 1px solid var(--hair);
  overflow: hidden;
}

.bay-footer::after {
  content: "";
  position: absolute;
  right: -140px;
  top: -120px;
  width: 420px;
  height: 420px;
  pointer-events: none;
  background-image: radial-gradient(rgba(53, 242, 200, 0.09) 1px, transparent 1.6px);
  background-size: 22px 22px;
  opacity: 0.55;
}

.bay-footer__inner {
  position: relative;
  z-index: 1;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 56px var(--gutter) 28px;
}

.bay-footer__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px 32px;
  margin-bottom: 32px;
}

.bay-footer__brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 26px;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--paper);
}
.bay-footer__brand span { font-weight: 300; letter-spacing: 0.2em; }

.bay-footer__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.bay-footer__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 36px 28px;
  padding-top: 30px;
  border-top: 1px solid var(--hair-paper);
}

.foot-group__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.24em;
  color: var(--glow);
}

.foot-group__list {
  display: grid;
  gap: 10px;
}

.foot-group__list a {
  color: var(--paper-dim);
  font-size: 14.5px;
  line-height: 1.5;
  text-decoration: none;
  transition: color 180ms var(--ease-out);
}
.foot-group__list a:hover,
.foot-group__list a:focus-visible { color: var(--glow); }

.foot-group__list--plain li {
  color: var(--paper-dim);
  font-size: 14px;
  line-height: 1.7;
  word-break: break-word;
}

.foot-key {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--line-moss);
  margin-bottom: 2px;
}

.foot-note {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--hair);
  color: var(--mist);
  font-size: 12.5px;
  line-height: 1.7;
  max-width: 30ch;
}

.bay-footer__legal {
  margin-top: 42px;
  padding-top: 18px;
  border-top: 1px solid var(--hair-paper);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.bay-footer__legal a {
  text-decoration: none;
  color: var(--mist);
  transition: color 180ms var(--ease-out);
}
.bay-footer__legal a:hover,
.bay-footer__legal a:focus-visible { color: var(--glow); }

/* =========================================================
   通用容器与排版
   ========================================================= */
.bay-wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.bay-section { padding: clamp(56px, 9vw, 132px) 0; }
.bay-section--tight { padding: clamp(32px, 5vw, 64px) 0; }

.bay-grid { display: grid; gap: 28px; }
.bay-grid--split { grid-template-columns: minmax(0, 1fr); }

.stack { display: grid; gap: 16px; }
.cluster { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }

.index-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--glow);
}
.index-label::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--glow);
}

.h-display {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(40px, 8vw, 96px);
  line-height: 0.98;
  letter-spacing: -0.025em;
}

.h-section {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(28px, 4.4vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.01em;
}
.h-section strong { font-weight: 800; }

.lead {
  font-size: clamp(18px, 2.1vw, 23px);
  line-height: 1.7;
  color: var(--paper-dim);
  max-width: 34ch;
}

.prose {
  max-width: 62ch;
  color: rgba(242, 235, 220, 0.82);
  font-size: 17px;
  line-height: 1.85;
}
.prose p { margin-bottom: 1.2em; }
.prose p:last-child { margin-bottom: 0; }

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

/* 浅色分区 */
.paper-block {
  background: var(--paper);
  color: var(--ink-black);
}
.paper-block .prose { color: #33413a; }
.paper-block .lead { color: #2b3830; }
.paper-block .index-label { color: #0f6b53; }
.paper-block .index-label::before { background: #0f6b53; }
.paper-block .rule { background: rgba(16, 26, 22, 0.16); }

/* =========================================================
   数据与图形组件
   ========================================================= */
.data-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.rank-top {
  color: var(--glow);
  text-shadow: 0 0 12px rgba(53, 242, 200, 0.45);
}

.delta {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--mist);
}
.delta--up { color: var(--ember); }
.delta--down { color: var(--mist); }

.panel-cut {
  position: relative;
  background: var(--ink-hull);
  border: 1px solid var(--line-moss);
  padding: 24px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.trace-line {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  pointer-events: none;
  transform: rotate(-1.6deg);
  transform-origin: left center;
  background: linear-gradient(90deg, transparent, var(--line-moss) 22%, var(--violet) 58%, transparent);
}

.dot-field {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(53, 242, 200, 0.16) 1px, transparent 1.6px);
  background-size: 26px 26px;
  opacity: 0.5;
}

/* 图片容器（页面阶段放置 <img>） */
.media-frame {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--ink-hull), var(--ink-deep));
  border: 1px solid var(--line-moss);
  aspect-ratio: 16 / 10;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }

.media-frame__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--paper);
  background: linear-gradient(0deg, rgba(6, 35, 28, 0.92), rgba(6, 35, 28, 0));
}

/* =========================================================
   交互组件
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  font-size: 14px;
  letter-spacing: 0.14em;
  text-decoration: none;
  color: var(--paper);
  border: 1px solid var(--line-moss);
  background: transparent;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% 66%, 92% 100%, 0 100%);
  transition: background 180ms var(--ease-out), color 180ms var(--ease-out), border-color 180ms var(--ease-out);
}
.btn--glow {
  background: var(--glow);
  border-color: var(--glow);
  color: var(--ink-black);
  font-weight: 700;
}
.btn--glow:hover,
.btn--glow:focus-visible { background: #5df7d6; }
.btn--paper {
  background: var(--paper);
  border-color: var(--paper);
  color: var(--ink-black);
}
.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--glow);
  color: var(--glow);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
  background: transparent;
  border: 1px solid var(--line-moss);
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% 62%, 88% 100%, 0 100%);
  transition: background 180ms var(--ease-out), color 180ms var(--ease-out), border-color 180ms var(--ease-out);
}
.chip:hover,
.chip:focus-visible { color: var(--paper); border-color: var(--mist); }
.chip[aria-pressed="true"],
.chip.is-active {
  background: var(--glow);
  border-color: var(--glow);
  color: var(--ink-black);
  font-weight: 700;
}

.switch {
  display: inline-flex;
  align-items: stretch;
  padding: 3px;
  border: 1px solid var(--line-moss);
  background: rgba(14, 59, 46, 0.7);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
}
.switch__btn {
  padding: 8px 18px;
  color: var(--mist);
  cursor: pointer;
  transition: background 180ms var(--ease-out), color 180ms var(--ease-out);
}
.switch__btn:hover,
.switch__btn:focus-visible { color: var(--paper); }
.switch__btn.is-active {
  background: var(--glow);
  color: var(--ink-black);
  font-weight: 700;
}

.fold { border-top: 1px solid var(--hair); }
.fold__btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 18px 0;
  text-align: left;
  font-size: 16px;
  letter-spacing: 0.04em;
  color: var(--paper);
  cursor: pointer;
  transition: color 180ms var(--ease-out);
}
.fold__btn:hover,
.fold__btn:focus-visible { color: var(--glow); }
.fold__sign {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
}
.fold__sign::before,
.fold__sign::after {
  content: "";
  position: absolute;
  background: var(--glow);
  transition: transform 220ms var(--ease-out);
}
.fold__sign::before { left: 0; right: 0; top: 6px; height: 1.5px; }
.fold__sign::after { top: 0; bottom: 0; left: 6px; width: 1.5px; }
.fold__btn[aria-expanded="true"] .fold__sign::after { transform: scaleY(0); }

.fold__panel { padding-bottom: 20px; }
[data-fold-panel] { display: none; }
[data-fold-panel][data-open] {
  display: block;
  animation: foldIn 220ms var(--ease-out) both;
}
@keyframes foldIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

.crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}
.crumb a { color: var(--mist); text-decoration: none; transition: color 180ms var(--ease-out); }
.crumb a:hover,
.crumb a:focus-visible { color: var(--glow); }
.crumb__sep { color: var(--line-moss); }

/* ---------- 滚动显现 ---------- */
html.has-motion .reveal { opacity: 0; transform: translateY(12px); }
html.has-motion .reveal.is-in {
  opacity: 1;
  transform: none;
  transition:
    opacity 320ms var(--ease-out) var(--reveal-delay, 0ms),
    transform 320ms var(--ease-out) var(--reveal-delay, 0ms);
}

/* =========================================================
   响应式
   ========================================================= */
@media (min-width: 960px) {
  .bay-grid--split {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 48px;
  }
}

@media (max-width: 1024px) {
  .bay-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 880px) {
  html { scroll-padding-top: 120px; }

  .masthead { padding: 16px var(--gutter) 12px; }
  .masthead::before,
  .masthead::after { display: none; }
  .masthead__deck { margin-top: 8px; font-size: 10px; letter-spacing: 0.16em; }

  .nav-trigger { display: flex; }

  .nav {
    max-height: 0;
    overflow: hidden;
    transition: max-height 280ms var(--ease-out);
  }
  .berth-nav[data-open] .nav {
    max-height: min(72vh, 560px);
    overflow-y: auto;
  }

  .nav__list {
    flex-direction: column;
    gap: 0;
    padding-bottom: 12px;
  }
  .nav__item { border-top: 1px solid var(--hair); }
  .nav__item:first-child { border-top: 0; }
  .nav__link {
    width: 100%;
    padding: 14px 2px;
    font-size: 16px;
  }
  .nav__link::after { display: none; }
  .nav__link[aria-current="page"] { padding-left: 10px; border-left: 2px solid var(--glow); }
}

@media (max-width: 640px) {
  :root { --gutter: 18px; }

  body { font-size: 16px; }

  .index-strip { display: none; }

  .bay-footer__inner { padding: 40px var(--gutter) 22px; }
  .bay-footer__head { margin-bottom: 24px; }
  .bay-footer__brand { font-size: 22px; }
  .bay-footer__grid { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .bay-footer__legal { gap: 6px 10px; font-size: 10.5px; }
  .bay-footer__legal .index-strip__sep { display: none; }

  .lead { max-width: none; }
}

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

  .index-strip__track { animation: none; }

  html.has-motion .reveal,
  html.has-motion .reveal.is-in {
    opacity: 1;
    transform: none;
    transition: none;
  }

  [data-fold-panel][data-open] { animation: none; }

  .skip-link,
  .nav-trigger__sign::before,
  .nav-trigger__sign::after,
  .nav,
  .nav__link,
  .nav__link::after,
  .fold__sign::before,
  .fold__sign::after,
  .btn,
  .chip,
  .switch__btn,
  .bay-footer__legal a,
  .foot-group__list a {
    transition: none;
  }
}