/* ==========================================================================
   /assets/site.css — 球王会·数据竞技场 共享样式
   1 重置 · 2 变量 · 3 基础排版 · 4 工具类 · 5 头部 · 6 移动导航 · 7 页脚
   8 按钮 · 9 面包屑 · 10 骨架与区块 · 11 通用组件 · 12 动效 · 13 响应式 · 14 降级
   ========================================================================== */

/* 1 重置 ---------------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

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

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

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

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

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

table { border-collapse: collapse; }

[hidden] { display: none !important; }

/* 2 变量 ---------------------------------------------------------------- */
:root {
  --ink: #05130E;
  --ink-deep: #0B211A;
  --surface: #122E24;
  --lime: #C8FF3D;
  --lime-soft: #E4FF9E;
  --amber: #F0B429;
  --indigo: #2B2350;
  --wine: #4A1B2A;
  --text: #E9F2EC;
  --muted: #93A79C;
  --line: rgba(200, 255, 61, 0.18);
  --line-soft: rgba(233, 242, 236, 0.10);

  --radius: 18px;
  --radius-sm: 12px;
  --pill: 999px;

  --shell: 1200px;
  --gutter: clamp(16px, 4vw, 40px);
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);

  --mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --display: "Source Han Sans SC Heavy", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

/* 3 基础排版 ------------------------------------------------------------ */
body {
  min-height: 100vh;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  background-color: var(--ink);
  background-image:
    radial-gradient(1100px 620px at 8% -12%, rgba(43, 35, 80, 0.55), transparent 62%),
    radial-gradient(900px 520px at 100% 0%, rgba(18, 46, 36, 0.9), transparent 58%),
    linear-gradient(rgba(200, 255, 61, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200, 255, 61, 0.025) 1px, transparent 1px);
  background-size: auto, auto, 72px 72px, 72px 72px;
  background-attachment: fixed, fixed, scroll, scroll;
}

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(40px, 7vw, 96px); }
h2 { font-size: clamp(26px, 3.6vw, 44px); }
h3 { font-size: clamp(18px, 2vw, 24px); }

p { text-wrap: pretty; }

:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
  border-radius: 6px;
}

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

/* 4 工具类 -------------------------------------------------------------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

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

.skip-link {
  position: fixed;
  top: 10px;
  left: -9999px;
  z-index: 200;
  padding: 10px 18px;
  border-radius: var(--pill);
  background: var(--lime);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.skip-link:focus {
  left: 16px;
  outline-offset: 2px;
}

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

/* 5 头部：悬浮胶囊浮岛 -------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  padding: 14px var(--gutter) 0;
  pointer-events: none;
}

.site-header > * { pointer-events: auto; }

.header-shell {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: clamp(10px, 1.8vw, 22px);
  max-width: var(--shell);
  margin-inline: auto;
  padding: 10px 14px;
  border-radius: var(--pill);
  background: linear-gradient(180deg, rgba(18, 46, 36, 0.80), rgba(11, 33, 26, 0.90));
  border: 1px solid var(--line);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.42);
  transition: padding 200ms ease, background-color 200ms ease, box-shadow 200ms ease;
}

.site-header.is-scrolled .header-shell {
  padding-block: 6px;
  background: linear-gradient(180deg, rgba(11, 33, 26, 0.94), rgba(5, 19, 14, 0.96));
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.55);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  padding: 4px 6px 4px 4px;
  border-radius: var(--pill);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 11px;
  background: var(--lime);
  color: var(--ink);
  font-family: var(--display);
  font-size: 18px;
  font-weight: 900;
  line-height: 1;
  box-shadow: 0 0 0 1px rgba(200, 255, 61, 0.45), 0 10px 22px rgba(200, 255, 61, 0.18);
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name {
  font-family: var(--display);
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.1em;
  color: var(--text);
}

.brand-suffix {
  font-size: 10px;
  letter-spacing: 0.26em;
  color: var(--muted);
}

/* 主导航 */
.primary-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  display: block;
  padding: 9px 13px;
  border-radius: var(--pill);
  font-size: 14.5px;
  letter-spacing: 0.05em;
  color: var(--muted);
  transition: color 160ms ease, background-color 160ms ease, box-shadow 160ms ease;
}

.nav-link:hover {
  color: var(--text);
  background: rgba(233, 242, 236, 0.06);
}

.nav-link[aria-current="page"] {
  color: var(--lime);
  background: rgba(200, 255, 61, 0.12);
  box-shadow: inset 0 0 0 1px rgba(200, 255, 61, 0.3);
}

/* 右侧工具区 */
.header-tools {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  flex: 0 0 auto;
}

.season-switch {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 6px;
  border-radius: var(--pill);
  background: rgba(233, 242, 236, 0.06);
  border: 1px solid var(--line);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.season-switch[data-inert] { display: none; }

.season-switch__label {
  padding-left: 6px;
  font-size: 10px;
  letter-spacing: 0.24em;
  color: var(--muted);
}

.season-btn {
  padding: 5px 10px;
  border-radius: var(--pill);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--muted);
  transition: background-color 160ms ease, color 160ms ease;
}

.season-btn:hover { color: var(--lime-soft); background: rgba(200, 255, 61, 0.1); }

.season-btn.is-active {
  background: var(--lime);
  color: var(--ink);
  font-weight: 700;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-radius: var(--pill);
  border: 1px solid var(--line);
  background: rgba(233, 242, 236, 0.05);
  color: var(--text);
  font-size: 13px;
  letter-spacing: 0.12em;
}

.nav-toggle__bars {
  display: grid;
  gap: 3px;
  width: 16px;
}

.nav-toggle__bars i {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--lime);
}

.nav-toggle__text { font-size: 12.5px; }

/* 进度轨 */
.scroll-rail {
  max-width: var(--shell);
  height: 2px;
  margin: 8px auto 0;
  border-radius: 2px;
  background: rgba(233, 242, 236, 0.08);
  overflow: hidden;
}

.scroll-rail__fill {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--lime), var(--amber));
}

/* 6 移动导航（≤960px） ------------------------------------------------- */
@media (max-width: 960px) {
  .site-header { padding-top: 10px; }

  .header-shell { border-radius: 26px; }

  .brand { order: 1; }
  .header-tools { order: 2; margin-left: auto; }
  .nav-toggle { display: inline-flex; }

  .header-cta-secondary { display: none; }

  .primary-nav {
    order: 3;
    flex-basis: 100%;
    display: none;
    justify-content: flex-start;
  }

  .primary-nav[data-open] {
    display: block;
    margin-top: 4px;
    padding: 10px;
    border-radius: 22px;
    background: rgba(5, 19, 14, 0.96);
    border: 1px solid var(--line);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.5);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .nav-link {
    padding: 13px 16px;
    border-radius: 14px;
    font-size: 16px;
    color: var(--text);
    border-left: 3px solid transparent;
  }

  .nav-link[aria-current="page"] {
    border-left-color: var(--lime);
    box-shadow: none;
  }
}

@media (max-width: 720px) {
  .header-cta { display: none; }
  .season-switch__label { display: none; }
}

/* 7 页脚 ---------------------------------------------------------------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 9vw, 120px);
  background:
    radial-gradient(circle at 88% -10%, rgba(43, 35, 80, 0.7), transparent 58%),
    linear-gradient(180deg, var(--ink-deep), #061A13 70%);
  color: var(--text);
}

.site-footer::before {
  content: "";
  display: block;
  height: 1px;
  background: linear-gradient(90deg, var(--lime), rgba(200, 255, 61, 0.15) 45%, transparent 70%, var(--amber));
}

.footer-shell {
  display: grid;
  grid-template-columns: minmax(240px, 1.5fr) repeat(3, minmax(130px, 1fr));
  gap: clamp(24px, 3.4vw, 48px);
  padding-top: clamp(40px, 5vw, 68px);
  padding-bottom: clamp(28px, 4vw, 44px);
}

.footer-brand {
  display: grid;
  gap: 12px;
  align-content: start;
}

.footer-line {
  max-width: 34ch;
  font-size: 14.5px;
  color: var(--muted);
}

.footer-note {
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: rgba(147, 167, 156, 0.75);
}

.footer-nav {
  display: contents;
}

.footer-col ul {
  display: grid;
  gap: 2px;
  margin-top: 14px;
}

.footer-col__title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--lime);
}

.footer-col__title::before {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--lime);
  opacity: 0.7;
}

.footer-link {
  display: inline-block;
  padding: 4px 0;
  font-size: 15px;
  color: var(--muted);
  transition: color 160ms ease, transform 160ms ease;
}

.footer-link:hover {
  color: var(--lime-soft);
  transform: translateX(3px);
}

.footer-contact {
  grid-column: 1 / -1;
  display: grid;
  gap: 6px;
  padding-top: clamp(20px, 3vw, 32px);
  border-top: 1px solid var(--line-soft);
}

.footer-contact__title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--amber);
}

.footer-contact__line {
  font-family: var(--mono);
  font-size: clamp(14px, 1.6vw, 18px);
  letter-spacing: 0.02em;
  color: var(--text);
}

.footer-contact__line--soft {
  font-family: var(--sans);
  font-size: 14px;
  color: var(--muted);
}

.footer-contact__note {
  max-width: 62ch;
  font-size: 13px;
  color: var(--muted);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-top: 18px;
  padding-bottom: 28px;
  border-top: 1px solid var(--line-soft);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.footer-legal { font-family: var(--mono); }

/* 8 按钮 ---------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: var(--pill);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  white-space: nowrap;
  transition: background-color 180ms ease, color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.btn-solid {
  background: var(--lime);
  color: #04120C;
  box-shadow: 0 10px 26px rgba(200, 255, 61, 0.2);
}

.btn-solid:hover { background: var(--lime-soft); transform: translateY(-1px); }

.btn-ghost {
  border-color: var(--line);
  background: rgba(233, 242, 236, 0.05);
  color: var(--text);
}

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

.btn-amber {
  background: var(--amber);
  color: #2A1A00;
}

.btn-amber:hover { background: #FFC94A; }

.btn-quiet {
  padding-inline: 8px;
  color: var(--muted);
}

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

/* 9 面包屑 -------------------------------------------------------------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.breadcrumb li { display: flex; align-items: center; }

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(200, 255, 61, 0.45);
}

.breadcrumb a { color: var(--muted); transition: color 160ms ease; }
.breadcrumb a:hover { color: var(--lime); }
.breadcrumb [aria-current="page"] { color: var(--text); }

/* 10 骨架与区块 --------------------------------------------------------- */
.section { padding-block: clamp(48px, 7vw, 88px); }

.arena-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 28px);
}

.arena-rail { grid-column: 1 / 4; }
.arena-stream { grid-column: 4 / 13; }
.span-6 { grid-column: span 6; }
.span-4 { grid-column: span 4; }

.page-hero { padding-block: clamp(44px, 7vw, 96px) clamp(28px, 4vw, 56px); }

.page-hero__title { font-size: clamp(36px, 6.4vw, 84px); }

.page-hero__lead {
  max-width: 62ch;
  margin-top: 20px;
  font-size: clamp(15px, 1.5vw, 18px);
  color: var(--muted);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: clamp(24px, 3vw, 38px);
}

.divider-line {
  height: 1px;
  background: linear-gradient(90deg, var(--lime), rgba(200, 255, 61, 0.1) 55%, transparent);
}

.prose {
  max-width: 70ch;
  color: var(--text);
}

.prose p + p { margin-top: 1em; }

/* 11 通用组件 ----------------------------------------------------------- */
.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.28em;
  color: var(--lime);
  text-transform: uppercase;
}

.exhibit-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px 6px 10px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--lime);
  border-radius: 6px;
  background: rgba(200, 255, 61, 0.08);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--lime-soft);
}

.v-annotation {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 12px;
  letter-spacing: 0.32em;
  color: var(--muted);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: var(--pill);
  border: 1px solid var(--line);
  background: rgba(200, 255, 61, 0.1);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--lime-soft);
}

.tag--amber {
  background: rgba(240, 180, 41, 0.14);
  border-color: rgba(240, 180, 41, 0.35);
  color: var(--amber);
}

/* 卡片 */
.card {
  position: relative;
  padding: clamp(18px, 2.2vw, 26px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
}

.card--glass {
  background: linear-gradient(180deg, rgba(233, 242, 236, 0.09), rgba(233, 242, 236, 0.03));
  border-color: var(--line);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
}

.card--indigo {
  background: linear-gradient(160deg, var(--indigo), #171233);
  border-color: rgba(200, 255, 61, 0.16);
}

.card--wine {
  background: linear-gradient(160deg, var(--wine), #2A0F19);
  border-color: rgba(240, 180, 41, 0.18);
}

.card--accent { border-left: 3px solid var(--lime); }

.card__title {
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text);
}

/* 数据块 */
.stat { display: grid; gap: 6px; }

.stat__value {
  font-family: var(--mono);
  font-size: clamp(28px, 4vw, 52px);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.stat__value--amber { color: var(--amber); }

.stat__unit {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.stat__note {
  font-size: 12.5px;
  color: var(--muted);
}

/* 微图表 */
.micro-chart {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 56px;
}

.micro-chart__bar {
  flex: 1 1 0;
  min-height: 4px;
  border-radius: 3px 3px 0 0;
  background: linear-gradient(180deg, var(--lime), rgba(200, 255, 61, 0.22));
}

.micro-chart__bar--avg {
  background: linear-gradient(180deg, var(--amber), rgba(240, 180, 41, 0.22));
}

/* 展签式数据点 */
.datapoint {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(240, 180, 41, 0.16);
}

.datapoint::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translate(-50%, 6px);
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(5, 19, 14, 0.96);
  color: var(--lime-soft);
  font-size: 12px;
  letter-spacing: 0.08em;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
}

.datapoint:hover::after,
.datapoint:focus-visible::after {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* 图片容器基础规则（页面阶段放入 <img> 即可） */
.media-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line-soft);
  background: linear-gradient(140deg, var(--ink-deep), var(--ink));
  aspect-ratio: 16 / 9;
}

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

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, transparent 42%, rgba(5, 19, 14, 0.88)),
    linear-gradient(90deg, rgba(200, 255, 61, 0.14), transparent 46%);
  pointer-events: none;
}

.media-frame__trace {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 16%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--lime), transparent);
  opacity: 0.6;
}

.media-frame__caption {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 2;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--lime-soft);
}

/* 数据表 */
.table-scroll { overflow-x: auto; }

.data-table {
  width: 100%;
  font-size: 14.5px;
}

.data-table th {
  padding: 10px 12px;
  text-align: left;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--lime);
  border-bottom: 1px solid var(--line);
}

.data-table td {
  padding: 11px 12px;
  border-top: 1px solid var(--line-soft);
  color: var(--text);
}

.data-table td.num {
  font-family: var(--mono);
  color: var(--lime-soft);
}

/* 折叠规则 */
.fold {
  border: 1px solid var(--line-soft);
  border-radius: 14px;
  background: rgba(18, 46, 36, 0.55);
  padding: 0 16px;
}

.fold + .fold { margin-top: 10px; }

.fold summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 0;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

.fold summary::-webkit-details-marker { display: none; }

.fold summary::after {
  content: "＋";
  font-family: var(--mono);
  color: var(--lime);
}

.fold[open] summary::after { content: "－"; }

.fold__body {
  padding-bottom: 16px;
  max-width: 70ch;
  font-size: 14.5px;
  color: var(--muted);
}

/* 主题筛选条 */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: rgba(233, 242, 236, 0.05);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.filter-bar[data-inert] { display: none; }

.filter-chip {
  padding: 8px 16px;
  border-radius: var(--pill);
  font-size: 13.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
  transition: background-color 160ms ease, color 160ms ease;
}

.filter-chip:hover { color: var(--lime-soft); background: rgba(200, 255, 61, 0.1); }

.filter-chip.is-active {
  background: var(--lime);
  color: var(--ink);
  font-weight: 700;
}

.filter-count {
  margin-left: auto;
  padding-right: 12px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
}

.filter-empty {
  padding: 22px 18px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--muted);
}

/* 赛季时间轴 */
.season-rail {
  position: relative;
  display: grid;
  gap: 2px;
  padding-left: 4px;
}

.season-tick {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 6px 0;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
  transition: color 180ms ease;
}

.season-tick::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(233, 242, 236, 0.2);
  transition: background-color 180ms ease, box-shadow 180ms ease;
}

.season-tick.is-current {
  color: var(--lime);
}

.season-tick.is-current::before {
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(200, 255, 61, 0.18);
}

/* 12 动效 --------------------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 520ms ease, transform 520ms cubic-bezier(0.22, 0.61, 0.36, 1);
  transition-delay: var(--d, 0ms);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* 13 响应式 ------------------------------------------------------------- */
@media (max-width: 1100px) {
  .header-cta-secondary { display: none; }
}

@media (max-width: 960px) {
  .arena-rail,
  .arena-stream,
  .span-6,
  .span-4 { grid-column: 1 / -1; }

  .footer-shell {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 600px) {
  h1 { font-size: clamp(34px, 10vw, 56px); }

  .footer-shell { grid-template-columns: 1fr; }

  .season-btn { padding: 5px 8px; font-size: 11.5px; }

  .filter-bar { border-radius: 22px; }

  .media-frame--wide { aspect-ratio: 16 / 9; }
}

/* 14 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;
    scroll-behavior: auto !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .datapoint::after { transition: none; }
}