/* ============================================================
   球盟会主站 · 共享样式 /assets/site.css
   01 reset · 02 变量 · 03 中文排版 · 04 容器与组件
   05 头部 · 06 页脚 · 07 动效与无障碍
   ============================================================ */

/* ---------- 01 reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, h5, p, ol, ul, li, figure, blockquote, address, dl, dd { margin: 0; padding: 0; }
ol, ul { list-style: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
[hidden] { display: none !important; }

/* ---------- 02 变量 ---------- */
:root {
  --ink: #061512;
  --stand: #0B211C;
  --pitch: #123D31;
  --cyan: #2FF3D0;
  --cyan-soft: #A6FFF0;
  --amber: #FFB547;
  --signal: #FF6B4A;
  --paper: #F4F0E6;
  --mist: #B8C9C3;
  --mist-dim: #7C9B92;
  --rule: #2C5A4E;

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

  --wrap-width: 1180px;
  --gutter: clamp(18px, 4.2vw, 48px);
  --radius: 2px;
}

/* ---------- 03 基础与中文排版 ---------- */
body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
::selection { background: var(--cyan); color: var(--ink); }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }
#main-content { flex: 1 0 auto; }
#main-content:focus { outline: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--paper);
}
h1 { font-size: clamp(2rem, 4.4vw, 3.2rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3 { font-size: clamp(1.12rem, 2vw, 1.4rem); letter-spacing: -0.005em; }
h4 { font-size: 1rem; font-weight: 700; }
strong { font-weight: 700; color: var(--paper); }
small { font-size: 0.82em; }

/* ---------- 04 容器与通用组件 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.prose { max-width: 34em; }
.prose p + p { margin-top: 1.1em; }
.prose a { color: var(--cyan); border-bottom: 1px solid var(--rule); }
.prose a:hover { border-bottom-color: var(--cyan); }

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  transform: translateY(-200%);
  padding: 10px 16px;
  background: var(--cyan);
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  border-radius: var(--radius);
  transition: transform 0.18s ease;
}
.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); outline-color: var(--paper); }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.72em 1.35em;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.06em;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--stand);
  color: var(--paper);
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}
.btn:hover { border-color: var(--cyan); color: var(--cyan-soft); transform: translateY(-1px); }
.btn--primary { background: var(--cyan); border-color: var(--cyan); color: var(--ink); font-weight: 700; }
.btn--primary:hover { background: var(--cyan-soft); border-color: var(--cyan-soft); color: var(--ink); }
.btn--amber { background: var(--amber); border-color: var(--amber); color: #12211C; font-weight: 700; }
.btn--amber:hover { background: #FFC97A; border-color: #FFC97A; color: #12211C; }
.btn--ghost { background: transparent; }

/* 注释 / 章节号 / 数据 / 标签 */
.annotation {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.18em;
  line-height: 1.6;
  color: var(--mist);
}
.annotation--vertical { writing-mode: vertical-rl; text-orientation: mixed; letter-spacing: 0.3em; }
.annotation--cyan { color: var(--cyan); }

.section-index {
  display: block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(2.4rem, 5.4vw, 4.2rem);
  line-height: 0.86;
  letter-spacing: -0.03em;
  color: rgba(44, 90, 78, 0.55);
}
@supports (-webkit-text-stroke: 1px #000) {
  .section-index { color: transparent; -webkit-text-stroke: 1.2px var(--rule); }
}

.metric {
  font-family: var(--font-mono);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  line-height: 1.1;
  color: var(--cyan);
}
.metric--amber { color: var(--amber); }
.metric--paper { color: var(--paper); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.22em 0.6em;
  background: var(--paper);
  color: #08211B;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1.6;
  border-radius: 1px;
  box-shadow: 2px 2px 0 var(--rule);
}
.tag--cyan { background: var(--cyan); color: var(--ink); }
.tag--amber { background: var(--amber); color: #12211C; }

.rule { width: 100%; height: 1px; border: 0; background: var(--rule); margin-block: clamp(20px, 3vw, 34px); }

.panel {
  position: relative;
  background: var(--stand);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: clamp(18px, 3vw, 28px);
}
.panel--paper { background: var(--paper); border-color: #D9D2C2; color: #0B211C; }
.panel--paper h2, .panel--paper h3, .panel--paper h4, .panel--paper strong { color: #0B211C; }

/* 网格 */
.grid { display: grid; gap: clamp(16px, 2.4vw, 26px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.split { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(22px, 4vw, 54px); }
.split--reverse { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }

/* 图片容器 */
.media-frame {
  position: relative;
  overflow: hidden;
  background: var(--pitch);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  aspect-ratio: 16 / 9;
}
.media-frame img,
.media-frame svg { width: 100%; height: 100%; object-fit: cover; filter: saturate(0.94) contrast(1.04); }
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame__label {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 4px 9px;
  background: rgba(6, 21, 18, 0.9);
  color: var(--mist);
  border-top: 1px solid var(--rule);
  border-right: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
}

/* 面包屑 */
.breadcrumbs { padding-block: 18px; font-size: 12.5px; color: var(--mist); }
.breadcrumbs ol { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5em; }
.breadcrumbs li { display: flex; align-items: center; gap: 0.5em; }
.breadcrumbs li + li::before { content: "/"; font-family: var(--font-mono); color: var(--rule); }
.breadcrumbs a { border-bottom: 1px solid transparent; }
.breadcrumbs a:hover { color: var(--cyan-soft); border-bottom-color: var(--rule); }
.breadcrumbs [aria-current="page"] { color: var(--paper); }

/* ---------- 05 头部 ---------- */
.site-header {
  position: relative;
  z-index: 40;
  background: var(--ink);
  border-bottom: 1px solid var(--rule);
}
.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(118deg, rgba(47, 243, 208, 0.10) 0%, rgba(47, 243, 208, 0) 34%, rgba(255, 181, 71, 0.06) 100%),
    linear-gradient(180deg, rgba(11, 33, 28, 0.9), rgba(6, 21, 18, 0) 72%);
}
.header-rail, .primary-nav, .league-strip { position: relative; z-index: 1; }
.header-rail { border-bottom: 1px solid var(--rule); }

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 18px;
  padding-block: 14px;
}
.brand { display: inline-flex; align-items: baseline; gap: 10px; min-width: 0; }
.brand-mark {
  position: relative;
  padding-left: 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.3rem, 2.4vw, 1.6rem);
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--paper);
}
.brand-mark::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.14em;
  bottom: 0.14em;
  width: 3px;
  background: var(--cyan);
}
.brand:hover .brand-mark { color: var(--cyan-soft); }
.brand-sub {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--mist-dim);
}
.brand-tagline { font-size: 11.5px; letter-spacing: 0.16em; line-height: 1.5; color: var(--mist); }
.header-actions { display: flex; align-items: center; gap: 10px; margin-left: auto; }

.cta-quick {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 9px 15px;
  border: 1px solid var(--cyan);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(47, 243, 208, 0.14), rgba(255, 181, 71, 0.10));
  color: var(--cyan-soft);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.cta-quick::after { content: "→"; font-family: var(--font-mono); font-size: 12px; color: var(--cyan); transition: transform 0.18s ease, color 0.18s ease; }
.cta-quick:hover { background: var(--cyan); color: var(--ink); border-color: var(--cyan); }
.cta-quick:hover::after { color: var(--ink); transform: translateX(3px); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--paper);
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan-soft); }
.nav-toggle-bars { display: inline-flex; flex-direction: column; justify-content: center; gap: 3px; width: 15px; }
.nav-toggle-bars span { display: block; width: 100%; height: 1.5px; background: var(--cyan); transition: transform 0.2s ease, opacity 0.2s ease; }
.nav-toggle-text { line-height: 1; }

.nav-inner { display: flex; align-items: center; gap: clamp(2px, 1.4vw, 16px); padding-block: 9px 11px; }
.nav-list { display: flex; flex: 1 1 auto; align-items: center; gap: clamp(2px, 1.2vw, 10px); min-width: 0; overflow-x: auto; scrollbar-width: thin; }
.nav-item { flex: 0 0 auto; }
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 9px 9px;
  border-bottom: 2px solid transparent;
  border-radius: 1px;
  color: var(--mist);
  font-size: 14px;
  letter-spacing: 0.02em;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}
.nav-index { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.06em; color: var(--mist-dim); transition: color 0.18s ease; }
.nav-label { line-height: 1.4; white-space: nowrap; }
.nav-link:hover { color: var(--paper); background: rgba(47, 243, 208, 0.07); }
.nav-link:hover .nav-index { color: var(--cyan); }
.nav-link[aria-current="page"] { color: var(--paper); border-bottom-color: var(--cyan); }
.nav-link[aria-current="page"] .nav-index { color: var(--amber); }
.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 9px;
  right: 9px;
  bottom: -1px;
  height: 7px;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(47, 243, 208, 0.32), rgba(47, 243, 208, 0));
}
.nav-note {
  flex: 0 0 auto;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.22em;
  color: var(--mist-dim);
  white-space: nowrap;
}

.league-strip { background: var(--stand); border-top: 1px solid var(--rule); }
.league-inner { display: flex; align-items: center; gap: 7px; padding-block: 8px; overflow-x: auto; scrollbar-width: thin; }
.league-hint { flex: 0 0 auto; margin-right: 4px; font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.2em; color: var(--mist-dim); }
.league-chip {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px 5px 10px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--mist);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  transition: color 0.16s ease, border-color 0.16s ease, background 0.16s ease;
}
.league-chip::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent, var(--rule)); transition: background 0.16s ease; }
.league-chip:hover { color: var(--paper); border-color: var(--cyan); }
.league-chip[aria-pressed="true"] { background: var(--accent, var(--cyan)); border-color: var(--accent, var(--cyan)); color: var(--ink); font-weight: 700; }
.league-chip[aria-pressed="true"]::before { background: var(--ink); }
.league-chip[data-league="all"] { --accent: var(--paper); }
.league-chip[data-league="football"] { --accent: #2FF3D0; }
.league-chip[data-league="basketball"] { --accent: #FFB547; }
.league-chip[data-league="esports"] { --accent: #FF6B4A; }
.league-chip[data-league="tennis"] { --accent: #A6FFF0; }
.league-chip[data-league="multi"] { --accent: #9B8CFF; }
.league-status {
  flex: 0 0 auto;
  margin-left: auto;
  padding-left: 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--mist-dim);
  white-space: nowrap;
}

.progress-rail {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  height: 2px;
  background: rgba(44, 90, 78, 0.35);
  pointer-events: none;
}
.progress-fill {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--cyan-soft) 62%, var(--amber));
  transition: width 0.12s linear;
}

/* ---------- 06 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: auto;
  overflow: hidden;
  background: var(--stand);
  border-top: 1px solid var(--rule);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(158deg, rgba(47, 243, 208, 0.07), rgba(47, 243, 208, 0) 42%, rgba(255, 181, 71, 0.05));
}
.footer-inner { position: relative; padding-block: clamp(36px, 5vw, 62px) clamp(10px, 2vw, 18px); }

.footer-head {
  display: grid;
  gap: 9px;
  padding-bottom: clamp(22px, 3vw, 32px);
  border-bottom: 1px solid var(--rule);
}
.footer-label { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.3em; text-transform: uppercase; color: var(--mist-dim); }
.footer-brand {
  display: inline-block;
  width: fit-content;
  padding-left: 12px;
  border-left: 3px solid var(--cyan);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.2vw, 2.2rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--paper);
}
.footer-brand:hover { color: var(--cyan-soft); }
.footer-domain { padding-left: 15px; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.18em; color: var(--mist); }
.footer-summary { max-width: 42em; padding-left: 15px; font-size: 13.5px; line-height: 1.85; color: var(--mist); }

.footer-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: clamp(22px, 4vw, 44px);
  padding-block: clamp(24px, 3.4vw, 38px);
  border-bottom: 1px solid var(--rule);
}
.footer-col { min-width: 0; }
.footer-col-title {
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
}
.footer-list { display: grid; gap: 8px; }
.footer-link {
  display: inline-block;
  border-bottom: 1px solid transparent;
  font-size: 13.5px;
  color: var(--mist);
  transition: color 0.16s ease, border-color 0.16s ease;
}
.footer-link:hover { color: var(--cyan-soft); border-bottom-color: var(--rule); }

.footer-address { display: grid; gap: 9px; font-style: normal; }
.footer-contact-row { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 10px; }
.footer-contact-key { flex: 0 0 auto; font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.16em; color: var(--mist-dim); }
.footer-contact-value { font-size: 13.5px; color: var(--paper); word-break: break-word; }
.footer-contact-value--mono { font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.02em; color: var(--cyan-soft); }
.footer-service { margin-top: 14px; padding-left: 12px; border-left: 1px solid var(--rule); font-size: 12px; line-height: 1.85; color: var(--mist-dim); }

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
  padding-block: 18px;
  font-size: 12px;
  color: var(--mist-dim);
}
.footer-icp { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.04em; color: var(--mist); }
.footer-copy { font-family: var(--font-mono); font-size: 11.5px; color: var(--mist); }
.footer-note { flex: 1 1 100%; font-size: 11.5px; letter-spacing: 0.02em; color: var(--mist-dim); }

.footer-wordmark {
  padding-top: clamp(14px, 3vw, 28px);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(3.4rem, 13vw, 8.4rem);
  line-height: 0.8;
  letter-spacing: -0.04em;
  color: rgba(44, 90, 78, 0.3);
  white-space: nowrap;
  overflow: hidden;
  user-select: none;
  pointer-events: none;
}
@supports (-webkit-text-stroke: 1px #000) {
  .footer-wordmark { color: transparent; -webkit-text-stroke: 1px var(--rule); }
}

/* ---------- 07 动效与无障碍 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.55s cubic-bezier(0.22, 0.7, 0.3, 1);
}
html.js [data-reveal].is-revealed { opacity: 1; transform: none; }

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

/* ---------- 响应式 ---------- */
@media (max-width: 959px) {
  .nav-toggle { display: inline-flex; }
  .nav-note { display: none; }
  .nav-inner { flex-direction: column; align-items: stretch; gap: 0; padding-block: 4px 12px; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 0; overflow: visible; }
  .nav-link {
    justify-content: flex-start;
    padding: 13px 4px;
    font-size: 15.5px;
    border-bottom: 1px solid var(--rule);
  }
  .nav-link[aria-current="page"] { border-bottom-color: var(--cyan); }
  .nav-link[aria-current="page"]::after { display: none; }
  .nav-link:focus-visible { outline-offset: -2px; }

  .js .primary-nav {
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: max-height 0.3s ease, visibility 0s linear 0.3s;
  }
  .js .site-header[data-open] .primary-nav {
    max-height: 620px;
    visibility: visible;
    transition: max-height 0.3s ease, visibility 0s;
  }
  .site-header[data-open] .nav-toggle-bars span:nth-child(1) { transform: translateY(4.5px) rotate(45deg); }
  .site-header[data-open] .nav-toggle-bars span:nth-child(2) { opacity: 0; }
  .site-header[data-open] .nav-toggle-bars span:nth-child(3) { transform: translateY(-4.5px) rotate(-45deg); }
}

@media (max-width: 860px) {
  .grid--2, .grid--3, .split, .split--reverse { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 719px) {
  .header-inner { padding-block: 12px; }
  .brand-tagline { order: 3; flex-basis: 100%; font-size: 11px; letter-spacing: 0.12em; }
  .brand-sub { display: none; }
  .cta-quick { padding: 8px 12px; font-size: 11.5px; }
  .footer-summary, .footer-domain, .footer-brand { padding-left: 10px; }
  .footer-legal { gap: 6px 14px; }
}