/* ============================================================
   必一体育看台 · 共享样式 /assets/site.css
   技术蓝图网格 + 看台阶梯错位
   ============================================================ */

/* ---------- 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, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }

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

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

a { color: inherit; }

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

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

:focus-visible {
  outline: 2px solid #C6F04A;
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- 2. 变量 ---------- */
:root {
  --night: #0D1B2A;
  --stand: #16293F;
  --pitch: #2E6B4B;
  --moss: #6E8F6A;
  --flame: #FF5A2C;
  --lime: #C6F04A;
  --cream: #F2EEE3;
  --rock: #8A9099;
  --clay: #B5715A;
  --verified: #3FA9A0;
  --ink: #08121C;
  --paper: #D8D3C6;

  --accent: var(--flame);
  --accent-soft: rgba(255, 90, 44, .18);

  --fs-12: 12px;
  --fs-14: 14px;
  --fs-16: 16px;
  --fs-20: 20px;
  --fs-28: 28px;
  --fs-40: 40px;
  --fs-64: 64px;

  --font-display: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", "SF Mono", Consolas, "Liberation Mono", "Courier New", monospace;

  --shell: 1320px;
  --gut: 24px;
  --pill: 999px;
  --header-h: 78px;

  --line: rgba(110, 143, 106, .32);
  --line-soft: rgba(110, 143, 106, .16);
  --dash: rgba(138, 144, 153, .38);
}

:root[data-region="guangzhou"] { --accent: #FF8A3D; --accent-soft: rgba(255, 138, 61, .18); }
:root[data-region="chengdu"] { --accent: var(--lime); --accent-soft: rgba(198, 240, 74, .16); }

/* ---------- 3. 基础排版 ---------- */
body {
  font-family: var(--font-body);
  font-size: var(--fs-16);
  line-height: 1.75;
  color: var(--cream);
  background-color: var(--night);
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 88px 88px, 88px 88px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -.01em;
}

h1 { font-size: clamp(var(--fs-28), 5vw, var(--fs-64)); }
h2 { font-size: clamp(var(--fs-20), 3vw, var(--fs-40)); }
h3 { font-size: var(--fs-20); }

p { max-width: 66ch; }

strong { font-weight: 800; color: var(--cream); }

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

/* ---------- 4. 容器与网格 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: clamp(16px, 3.5vw, 32px);
}

.grid { display: grid; gap: var(--gut); }

.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

.divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, rgba(110, 143, 106, .65), rgba(110, 143, 106, 0));
  margin: 40px 0;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}

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

.prose {
  max-width: 36em;
  font-size: 17px;
  line-height: 1.75;
}

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

.prose h2 { margin: 1.6em 0 .6em; font-size: var(--fs-20); }

.prose ul { margin: .8em 0; display: grid; gap: .35em; }

.prose li { padding-left: 1.2em; position: relative; }

.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 7px;
  height: 1px;
  background: var(--moss);
}

/* ---------- 5. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 12px;
  top: -72px;
  z-index: 140;
  padding: 10px 18px;
  background: var(--lime);
  color: var(--ink);
  font-size: var(--fs-14);
  font-weight: 800;
  text-decoration: none;
  border-radius: 0 0 12px 12px;
  transition: top .2s ease;
}

.skip-link:focus { top: 0; }

/* ---------- 6. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  color: var(--cream);
  background: rgba(8, 18, 28, .86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.header-shell {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(10px, 2vw, 26px);
  width: 100%;
  max-width: var(--shell);
  min-height: var(--header-h);
  margin-inline: auto;
  padding: 10px clamp(14px, 3vw, 28px);
}

.scroll-progress {
  height: 2px;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--pitch), var(--accent), var(--lime));
}

/* 品牌刻度 */
.brand-mark {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
  flex: 0 0 auto;
}

.brand-mark__glyph {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 26px;
}

.brand-mark__bar {
  display: block;
  width: 5px;
  border-radius: 2px 2px 0 0;
  background: var(--pitch);
}

.brand-mark__bar:nth-child(1) { height: 10px; background: var(--moss); }
.brand-mark__bar:nth-child(2) { height: 18px; background: var(--pitch); }
.brand-mark__bar:nth-child(3) { height: 26px; background: var(--accent); }

.brand-mark__text { display: block; }

.brand-mark__name {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-16);
  letter-spacing: .02em;
  line-height: 1.2;
}

.brand-mark__meta {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .06em;
  color: var(--rock);
  line-height: 1.4;
  transition: opacity .2s ease;
}

/* 悬浮胶囊导航 */
.nav-capsule {
  justify-self: center;
  padding: 5px;
  background: rgba(22, 41, 63, .92);
  border: 1px solid var(--line);
  border-radius: var(--pill);
  box-shadow: 0 12px 30px rgba(0, 0, 0, .38);
}

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

.nav-capsule__link {
  display: block;
  padding: 9px 15px;
  border-radius: var(--pill);
  font-size: var(--fs-14);
  font-weight: 700;
  color: var(--cream);
  text-decoration: none;
  white-space: nowrap;
  transition: background .2s ease, color .2s ease;
}

.nav-capsule__link:hover { background: rgba(46, 107, 75, .55); }

.nav-capsule__link[aria-current="page"] {
  background: var(--pitch);
  color: #fff;
  box-shadow: inset 0 0 0 1px rgba(198, 240, 74, .38);
}

/* 右侧控制台 */
.header-tools {
  display: flex;
  align-items: center;
  gap: 8px;
  justify-self: end;
  flex: 0 0 auto;
}

.region-switch {
  display: flex;
  gap: 2px;
  padding: 4px;
  background: rgba(22, 41, 63, .92);
  border: 1px solid var(--line);
  border-radius: var(--pill);
}

.region-switch__btn {
  padding: 6px 11px;
  border-radius: var(--pill);
  font-size: var(--fs-12);
  font-weight: 700;
  color: var(--rock);
  letter-spacing: .04em;
  transition: background .2s ease, color .2s ease;
}

.region-switch__btn:hover { color: var(--cream); }

.region-switch__btn[aria-pressed="true"] {
  background: var(--accent);
  color: var(--ink);
}

/* 赛季选择器 */
.season-picker { position: relative; }

.season-picker__toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: rgba(22, 41, 63, .92);
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--cream);
  transition: border-color .2s ease, color .2s ease;
}

.season-picker__toggle:hover { border-color: var(--accent); }

.season-picker__value {
  font-family: var(--font-mono);
  color: var(--accent);
}

.season-picker__menu {
  position: absolute;
  right: 0;
  top: calc(100% + 10px);
  min-width: 168px;
  padding: 6px;
  background: var(--stand);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, .5);
  z-index: 120;
}

.season-picker__option {
  display: block;
  width: 100%;
  padding: 8px 12px;
  border-radius: 10px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--rock);
  transition: background .18s ease, color .18s ease;
}

.season-picker__option:hover { background: rgba(46, 107, 75, .45); color: var(--cream); }

.season-picker__option[aria-selected="true"] {
  background: var(--accent-soft);
  color: var(--accent);
}

/* 移动菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--cream);
}

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 10px;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--cream);
  transition: transform .2s ease;
}

.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-4px) rotate(-45deg); }

/* 滚动后收窄为浮岛条 */
@media (min-width: 1081px) {
  [data-header][data-scrolled] .header-shell { min-height: 58px; }
  [data-header][data-scrolled] .brand-mark__meta { opacity: 0; height: 0; overflow: hidden; }
  [data-header][data-scrolled] .nav-capsule { padding: 4px; }
  [data-header][data-scrolled] .nav-capsule__link { padding: 6px 12px; font-size: var(--fs-12); }
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  margin-top: 96px;
  color: var(--cream);
  background: linear-gradient(180deg, var(--night) 0%, var(--ink) 100%);
  border-top: 1px solid var(--line);
  box-shadow: inset 0 3px 0 -1px var(--pitch);
}

.footer-shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(34px, 5vw, 64px) clamp(16px, 3.5vw, 32px) 26px;
}

.footer-band {
  display: grid;
  gap: 10px;
  padding-bottom: 26px;
  border-bottom: 1px dashed var(--dash);
}

.footer-band__line {
  max-width: 46ch;
  font-family: var(--font-display);
  font-size: var(--fs-20);
  font-weight: 900;
  line-height: 1.4;
}

.footer-band__scope {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .06em;
  color: var(--rock);
}

.footer-index {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 26px;
  padding: 28px 0;
}

.footer-index__title {
  margin-bottom: 12px;
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--moss);
}

.footer-index__list { display: grid; gap: 9px; }

.footer-index__link {
  font-size: var(--fs-14);
  color: var(--cream);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}

.footer-index__link:hover { color: var(--lime); border-bottom-color: var(--lime); }

.footer-legal {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-top: 1px dashed var(--dash);
  border-bottom: 1px dashed var(--dash);
  font-size: var(--fs-14);
  color: var(--rock);
}

.footer-legal__line { max-width: 62ch; margin: 0; }

.footer-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 16px;
  padding-top: 22px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--rock);
}

.footer-meta__item { margin: 0; line-height: 1.7; }

.footer-meta__label {
  display: block;
  margin-bottom: 3px;
  letter-spacing: .12em;
  color: var(--moss);
}

.footer-bottom {
  margin-top: 22px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--rock);
  letter-spacing: .06em;
}

/* ---------- 8. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: var(--pill);
  font-size: var(--fs-14);
  font-weight: 800;
  text-decoration: none;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}

.btn--solid { background: var(--pitch); color: #fff; }
.btn--solid:hover { background: var(--moss); }

.btn--flame { background: var(--flame); color: var(--ink); }
.btn--flame:hover { background: #ff7a52; }

.btn--lime { background: var(--lime); color: var(--ink); }
.btn--lime:hover { background: #d8fa76; }

.btn--ghost {
  border-color: var(--line);
  color: var(--cream);
  background: rgba(22, 41, 63, .5);
}
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- 9. 面包屑 / 章节头 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 20px 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--rock);
}

.breadcrumb__item { color: var(--rock); text-decoration: none; }
.breadcrumb__item:hover { color: var(--lime); }
.breadcrumb__item[aria-current="page"] { color: var(--cream); }
.breadcrumb__sep { color: var(--moss); }

.section-head {
  display: grid;
  gap: 10px;
  margin-bottom: 28px;
}

.section-head__index {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .22em;
  color: var(--accent);
}

.section-head__title {
  font-family: var(--font-display);
  font-size: clamp(var(--fs-28), 4vw, var(--fs-40));
  font-weight: 900;
  line-height: 1.15;
}

.section-head__note {
  max-width: 42ch;
  font-size: var(--fs-14);
  color: var(--rock);
}

/* ---------- 10. 卡片 / 图片容器 ---------- */
.card {
  padding: 20px;
  background: var(--stand);
  border: 1px solid var(--line);
  border-radius: 18px;
}

.card--tilt { transform: rotate(-2deg); }
.card--tilt-right { transform: rotate(2deg); }
.card--tilt:hover,
.card--tilt-right:hover { transform: rotate(0); transition: transform .25s ease; }

.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 18px;
  background:
    linear-gradient(135deg, var(--stand) 0%, var(--night) 100%);
}

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

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--band { aspect-ratio: 16 / 5; }

.media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .05em;
  color: var(--cream);
  background: linear-gradient(0deg, rgba(8, 18, 28, .92), rgba(8, 18, 28, 0));
}

/* ---------- 11. 标签 / 状态 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .04em;
  color: var(--moss);
}

.tag--flame { border-color: var(--flame); color: var(--flame); }
.tag--lime { border-color: var(--lime); color: var(--lime); background: rgba(198, 240, 74, .08); }

.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .04em;
  color: var(--rock);
}

.status__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--rock);
}

.status--verified { color: var(--verified); }
.status--verified .status__dot { background: var(--verified); }

.status--pending { color: var(--flame); }
.status--pending .status__dot { background: var(--flame); }

/* ---------- 12. 显现动效 ---------- */
[data-anim="on"] .reveal {
  opacity: 0;
  transform: translate3d(0, 10px, 0);
  transition: opacity .38s ease, transform .38s cubic-bezier(.22, .7, .3, 1);
}

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

/* ---------- 13. 响应式 ---------- */
@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }

  .nav-capsule {
    position: fixed;
    left: 14px;
    right: 14px;
    top: 84px;
    z-index: 130;
    padding: 10px;
    border-radius: 20px;
    background: rgba(13, 27, 42, .98);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity .22s ease, transform .22s ease, visibility .22s;
  }

  .nav-capsule[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

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

  .nav-capsule__link {
    padding: 12px 16px;
    font-size: var(--fs-16);
    border-radius: 14px;
  }
}

@media (max-width: 900px) {
  .grid--12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  :root { --gut: 16px; }

  .brand-mark__meta { display: none; }

  .header-shell { min-height: 64px; }

  .nav-capsule { top: 70px; }

  .nav-toggle__label { display: none; }

  .region-switch__btn { padding: 6px 9px; }

  .season-picker__toggle { padding: 8px 11px; }

  .site-footer { margin-top: 64px; }

  .footer-band__line { font-size: var(--fs-16); }
}

@media (max-width: 600px) {
  .grid--12 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .header-tools { gap: 6px; }

  .season-picker__menu { right: -6px; }
}

/* ---------- 14. 降级与无障碍 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  [data-anim="on"] .reveal {
    opacity: 1;
    transform: none;
  }

  .card--tilt,
  .card--tilt-right { transform: none; }
}