/* ============================================================
   球友汇赛场 — 共享站点样式 /assets/site.css
   分区：reset → 变量 → 中文排版 → 布局 → 头部 → 页脚 → 组件
   ============================================================ */

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

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

body {
  margin: 0;
  background: var(--night);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

:root {
  /* 色彩分区 */
  --night: #0A1C2E;
  --grass: #123A2B;
  --midline: #1E5C41;
  --lime: #C8FF4D;
  --amber: #FF8A3D;
  --indigo: #3B2E6B;
  --wine: #6B2131;
  --paper: #F4F1E8;
  --paper-ink: #10201A;
  --mist: #9DB8AE;
  --hair: #2C3B47;

  /* 排版 */
  --font-head: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: var(--font-head);
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 尺度 */
  --shell: 1180px;
  --rail-w: 208px;
  --pill-max: 1180px;
  --radius: 12px;
  --shadow-soft: 0 18px 44px -34px rgba(0, 0, 0, 0.92);
}

img, svg, video { max-width: 100%; display: block; }
ul, ol { margin: 0; padding: 0; list-style: none; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

a { color: var(--lime); text-decoration: none; }
a:hover { text-decoration: none; }

:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
  border-radius: 4px;
}

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

/* ---------- 中文排版基线 ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 500;
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin: 0 0 0.5em;
  text-wrap: balance;
}

h1 { font-size: clamp(38px, 6.4vw, 92px); }
h2 { font-size: clamp(26px, 3.4vw, 46px); }
h3 { font-size: clamp(19px, 2vw, 26px); }
h4 { font-size: 17px; letter-spacing: 0; }

strong { font-weight: 600; }

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

.muted { color: var(--mist); }

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

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

.rail-layout {
  display: grid;
  grid-template-columns: var(--rail-w) minmax(0, 1fr);
  gap: clamp(24px, 3vw, 48px);
  align-items: start;
}

.rail {
  position: sticky;
  top: 104px;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

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

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 24px);
}

.col-4 { grid-column: span 4; }
.col-6 { grid-column: span 6; }
.col-8 { grid-column: span 8; }
.col-10 { grid-column: span 10; }
.col-12 { grid-column: span 12; }

/* ---------- 分区底色 ---------- */
.section--night { background: var(--night); color: var(--paper); }
.section--grass { background: var(--grass); color: var(--paper); }
.section--paper { background: var(--paper); color: var(--paper-ink); }

.section--paper .muted { color: #5F6F65; }
.section--paper .index-label { color: #5F6F65; }
.section--paper .index-label::before { background: var(--midline); }
.section--paper .goal-frame { border-color: #C9CFC7; }
.section--paper a { color: #17513A; }

.edge-slant {
  clip-path: polygon(0 26px, 100% 0, 100% 100%, 0 100%);
  margin-top: -26px;
}

/* ---------- 索引标签 ---------- */
.index-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
}

.index-label::before {
  content: "";
  display: block;
  width: 24px;
  height: 1px;
  background: var(--lime);
  flex: 0 0 auto;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid var(--hair);
  background: transparent;
  color: var(--paper);
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.2;
  cursor: pointer;
  transition: border-color 0.25s ease, background 0.25s ease, color 0.25s ease, transform 0.25s ease;
}

.btn:hover { border-color: var(--lime); transform: translateY(-1px); }

.btn--accent {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--night);
  font-weight: 600;
}
.btn--accent:hover { background: #D8FF78; border-color: #D8FF78; color: var(--night); }

.btn--warm {
  background: var(--amber);
  border-color: var(--amber);
  color: #211208;
  font-weight: 600;
}
.btn--warm:hover { background: #FFA063; border-color: #FFA063; }

.btn--ghost { border-color: rgba(244, 241, 232, 0.24); }
.btn--ghost:hover { border-color: var(--lime); }

.section--paper .btn { color: var(--paper-ink); border-color: #C9CFC7; }
.section--paper .btn--accent { color: var(--night); border-color: var(--lime); }

/* ---------- 面包屑 ---------- */
.breadcrumbs {
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
  margin: 0 0 26px;
}
.breadcrumbs a { color: var(--mist); }
.breadcrumbs a:hover { color: var(--lime); }
.breadcrumbs .sep { margin: 0 9px; opacity: 0.5; }

/* ---------- 正文 ---------- */
.prose {
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.8;
}
.prose h2 { margin-top: 1.6em; }
.prose h3 { margin-top: 1.4em; }
.prose ul { list-style: disc; padding-left: 1.3em; margin: 0 0 1.2em; }
.prose li { margin-bottom: 0.4em; }

/* ---------- 图片容器 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--hair);
  border-radius: var(--radius);
  background: linear-gradient(158deg, var(--grass) 0%, var(--night) 72%);
  aspect-ratio: 16 / 9;
  box-shadow: var(--shadow-soft);
}

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

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

.media-frame__caption {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}
.section--paper .media-frame__caption { color: #5F6F65; }

/* ---------- 数据卡与数字 ---------- */
.data-card {
  background: rgba(18, 58, 43, 0.5);
  border: 1px solid var(--hair);
  border-radius: var(--radius);
  padding: clamp(18px, 2.4vw, 26px);
}
.section--paper .data-card {
  background: #FFFFFF;
  border-color: #DCDCD2;
  color: var(--paper-ink);
}

.stat { display: flex; flex-direction: column; gap: 6px; }

.stat__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(32px, 5vw, 54px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--lime);
}
.section--paper .stat__value { color: #15543C; }

.stat__label {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}
.section--paper .stat__label { color: #5F6F65; }

/* ---------- 标签 ---------- */
.tag {
  display: inline-block;
  padding: 3px 11px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 11.5px;
  letter-spacing: 0.1em;
  line-height: 1.7;
  white-space: nowrap;
}

.tag--lime { background: rgba(200, 255, 77, 0.14); color: var(--lime); border-color: rgba(200, 255, 77, 0.42); }
.tag--warm { background: rgba(255, 138, 61, 0.14); color: var(--amber); border-color: rgba(255, 138, 61, 0.42); }
.tag--indigo { background: var(--indigo); color: #DCD5FF; }
.tag--wine { background: var(--wine); color: #F7D8DE; }

/* ---------- 球门线框锚点 ---------- */
.goal-frame {
  position: relative;
  border: 1px solid var(--hair);
  border-radius: 6px;
  padding: clamp(16px, 2.4vw, 26px);
}
.goal-frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--lime);
  opacity: 0.75;
  border-radius: 2px;
}

/* ---------- 轮次刻度条 ---------- */
.tick-track {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  margin: 0;
  padding: 0;
}

.tick {
  width: 3px;
  height: 16px;
  padding: 0;
  border: 0;
  border-radius: 2px;
  background: var(--hair);
  cursor: pointer;
  transition: background 0.25s ease, height 0.25s ease;
}
.tick:hover { background: var(--mist); }
.tick[aria-current="true"] { background: var(--lime); height: 26px; }

/* ---------- 滚动显现协议 ---------- */
.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}
.has-js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ============================================================
   头部：悬浮胶囊导航
   ============================================================ */
.skip-link {
  position: fixed;
  left: 14px;
  top: -70px;
  z-index: 140;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--lime);
  color: var(--night);
  font-size: 13px;
  font-weight: 600;
  transition: top 0.2s ease;
}
.skip-link:focus { top: 14px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  padding: clamp(10px, 1.6vw, 16px) clamp(12px, 3vw, 28px) 0;
  transition: padding-top 0.3s ease;
}
.site-header.is-condensed { padding-top: 7px; }

.pill {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
  width: 100%;
  max-width: var(--pill-max);
  margin-inline: auto;
  padding: 10px 12px 10px 20px;
  border: 1px solid var(--hair);
  border-radius: 999px;
  background: rgba(10, 28, 46, 0.84);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-soft);
  transition: padding 0.3s ease, max-width 0.3s ease, background 0.3s ease;
}
.site-header.is-condensed .pill {
  padding-block: 6px;
  max-width: calc(var(--pill-max) - 44px);
  background: rgba(10, 28, 46, 0.96);
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 1px;
  flex: 0 0 auto;
  min-width: 0;
  color: var(--paper);
}

.brand__mark {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.03em;
  line-height: 1.35;
  white-space: nowrap;
}

.brand__tagline {
  font-size: 11px;
  letter-spacing: 0.1em;
  line-height: 1.4;
  color: var(--mist);
  white-space: nowrap;
}

.site-nav { display: flex; flex: 1 1 auto; justify-content: center; }

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.7vw, 22px);
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 6px 2px;
  font-size: 13.5px;
  line-height: 1.6;
  color: #C6D6CD;
  white-space: nowrap;
  transition: color 0.22s ease;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--lime);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.25s ease;
}

.site-nav__link:hover { color: var(--paper); }
.site-nav__link:hover::after { transform: scaleX(1); }

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

.pill__cta {
  flex: 0 0 auto;
  padding: 9px 17px;
  border-radius: 999px;
  background: var(--lime);
  color: var(--night);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: filter 0.2s ease, transform 0.2s ease;
}
.pill__cta:hover { filter: brightness(1.06); transform: translateY(-1px); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 7px 13px;
  border: 1px solid var(--hair);
  border-radius: 999px;
  background: transparent;
  color: var(--paper);
  font-family: inherit;
  font-size: 12.5px;
  line-height: 1.4;
  cursor: pointer;
}

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: background 0.22s ease;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.25s ease;
}
.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-5px) rotate(-45deg); }

/* ============================================================
   页脚：夜赛蓝收束
   ============================================================ */
.site-footer {
  margin-top: clamp(56px, 9vw, 110px);
  padding: clamp(44px, 7vw, 82px) 0 30px;
  background: var(--night);
  border-top: 1px solid var(--hair);
  color: var(--paper);
}

.footer__top {
  display: grid;
  grid-template-columns: minmax(210px, 1fr) minmax(0, 2fr);
  gap: clamp(28px, 5vw, 64px);
  padding-bottom: clamp(28px, 4vw, 46px);
  border-bottom: 1px solid var(--hair);
}

.footer__masthead { display: flex; flex-direction: column; gap: 12px; }

.footer__brand {
  margin: 0;
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.footer__statement {
  margin: 0;
  max-width: 30ch;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--mist);
}

.footer__columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 36px);
}

.footer__col { display: flex; flex-direction: column; gap: 14px; }

.footer__col-title {
  margin: 0;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
  font-family: var(--font-mono);
}

.footer__list { display: flex; flex-direction: column; gap: 9px; }

.footer__link {
  display: inline-block;
  font-size: 14px;
  line-height: 1.6;
  color: #C6D6CD;
  transition: color 0.2s ease, transform 0.2s ease;
}
.footer__link:hover { color: var(--lime); transform: translateX(2px); }

.footer__legal {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 8px 32px;
  padding: clamp(22px, 3vw, 32px) 0 0;
}

.footer__meta {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: #C6D6CD;
}

.footer__meta-key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.footer__note {
  margin: 22px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--hair);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--mist);
}

.footer__year {
  font-family: var(--font-mono);
  color: var(--lime);
  margin-left: 8px;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .rail-layout { grid-template-columns: 176px minmax(0, 1fr); }
  .rail { position: static; }
}

@media (max-width: 980px) {
  .rail-layout { grid-template-columns: minmax(0, 1fr); }
  .rail { flex-direction: row; flex-wrap: wrap; gap: 14px; }
}

@media (max-width: 900px) {
  .site-nav { display: none; flex: 0 0 auto; }

  .site-nav[data-open] {
    display: block;
    flex-basis: 100%;
    width: 100%;
    margin-top: 10px;
    padding: 10px 2px 4px;
    border-top: 1px solid var(--hair);
  }

  .site-nav[data-open] .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav[data-open] .site-nav__link {
    display: block;
    padding: 11px 4px;
    font-size: 15px;
  }

  .site-nav[data-open] .site-nav__link::after { left: 4px; right: 4px; }

  .pill {
    flex-wrap: wrap;
    border-radius: 24px;
    padding: 10px 14px;
  }

  .brand { order: 1; flex: 1 1 auto; }
  .nav-toggle { order: 2; display: inline-flex; }
  .pill__cta { order: 3; }
  .site-nav { order: 5; }

  .site-header.is-condensed .pill { max-width: 100%; }
}

@media (max-width: 760px) {
  .col-4, .col-6, .col-8, .col-10 { grid-column: span 12; }
  .footer__top { grid-template-columns: minmax(0, 1fr); }
  .footer__columns { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 520px) {
  body { font-size: 15.5px; }
  .brand__tagline { display: none; }
  .pill__cta { padding: 8px 13px; font-size: 12.5px; }
  .footer__columns { grid-template-columns: minmax(0, 1fr); }
  .media-frame--wide { aspect-ratio: 16 / 9; }
}

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

  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

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

  .site-header.is-condensed .pill { max-width: var(--pill-max); }
  .footer__link:hover { transform: none; }
  .btn:hover { transform: none; }
  .pill__cta:hover { transform: none; }
}