/* =========================================================
   球盟会CN · 共享样式 /assets/site.css
   夜间赛场数据中枢：深墨蓝底 · 荧光青数据轴 · 电光橙操作点
   ========================================================= */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, figcaption, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink: #07111F;
  --ink-2: #0D1B2E;
  --slate: #16283F;
  --cyan: #3EF2E0;
  --orange: #FF8A4C;
  --sand: #E8D9BF;
  --paper: #F4EBD9;
  --umber: #1A1512;
  --mist: #A8B7C6;
  --edge: #2A4664;

  --bg: var(--ink);
  --fg: #E9EFF6;
  --fg-muted: var(--mist);

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

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 180ms;
  --dur: 320ms;
  --dur-slow: 420ms;

  --w-max: 1320px;
  --w-prose: 760px;
  --gutter: clamp(1.1rem, 4vw, 3.5rem);

  --radius: 2px;
  --z-header: 100;
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    radial-gradient(62rem 38rem at 84% -12%, rgba(62, 242, 224, 0.10), transparent 62%),
    radial-gradient(48rem 32rem at -8% 6%, rgba(255, 138, 76, 0.09), transparent 64%);
  background-attachment: fixed;
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: clamp(1rem, 0.36vw + 0.9rem, 1.125rem);
  line-height: 1.72;
  letter-spacing: 0.012em;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--fg);
  text-wrap: balance;
}
h1 { font-size: clamp(2.6rem, 5vw, 5.2rem); letter-spacing: -0.03em; }
h2 { font-size: clamp(1.6rem, 2.4vw, 2.6rem); }
h3 { font-size: clamp(1.1rem, 1.4vw, 1.35rem); }
p { max-width: 68ch; }

::selection { background: var(--cyan); color: var(--umber); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 1px;
}

#main-content { display: block; scroll-margin-top: 7rem; }

/* ---------- 4. 跳过链接 ---------- */
.skip-link {
  position: fixed;
  top: 0.6rem;
  left: 1rem;
  z-index: 999;
  transform: translateY(-180%);
  padding: 0.7rem 1.15rem;
  background: var(--cyan);
  color: var(--umber);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  border-radius: var(--radius);
  transition: transform var(--dur-fast) var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* ---------- 5. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: linear-gradient(180deg, rgba(7, 17, 31, 0.97) 0%, rgba(9, 21, 36, 0.94) 100%);
  -webkit-backdrop-filter: blur(12px) saturate(120%);
  backdrop-filter: blur(12px) saturate(120%);
  border-bottom: 1px solid rgba(42, 70, 100, 0.55);
  transition: box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.site-header[data-stuck] {
  box-shadow: 0 16px 36px -28px rgba(0, 0, 0, 1);
  border-bottom-color: rgba(62, 242, 224, 0.3);
}

.masthead { padding-block: 0.5rem 0.3rem; }

.masthead__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 0.75rem 1rem;
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding: 0.55rem var(--gutter) 0.35rem;
}

.masthead__rail {
  justify-self: start;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  max-width: 100%;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--mist);
  white-space: nowrap;
  overflow: hidden;
}
.masthead__rail::before {
  content: "";
  flex: none;
  width: 1.7rem;
  height: 1px;
  background: var(--cyan);
}

.brand {
  justify-self: center;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--fg);
}
.brand__mark {
  display: grid;
  place-items: center;
  width: 1.6rem;
  height: 1.6rem;
  border: 1px solid var(--cyan);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.04em;
  transform: rotate(-8deg);
  transition: transform var(--dur) var(--ease), background var(--dur-fast) var(--ease);
}
.brand:hover .brand__mark,
.brand:focus-visible .brand__mark {
  transform: rotate(0deg);
  background: rgba(62, 242, 224, 0.14);
}
.brand__name {
  font-size: clamp(1.24rem, 2.1vw, 1.72rem);
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1;
}
.brand__suffix {
  align-self: flex-start;
  margin-top: 0.1rem;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.26em;
  color: var(--orange);
  line-height: 1;
}

.masthead__meta {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 0.9rem;
}
.masthead__tagline {
  max-width: none;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--mist);
  white-space: nowrap;
}

/* 移动端栏目按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  padding: 0.46rem 0.72rem;
  border: 1px solid rgba(62, 242, 224, 0.4);
  border-radius: var(--radius);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.nav-toggle:hover { background: rgba(62, 242, 224, 0.09); }
.nav-toggle[aria-expanded="true"] {
  border-color: var(--cyan);
  background: rgba(62, 242, 224, 0.13);
}
.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: background var(--dur) var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), top var(--dur) var(--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 { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { top: 0; transform: rotate(-45deg); }
.nav-toggle__label { line-height: 1; }

/* 主导航 */
.site-nav {
  width: 100%;
  border-top: 1px solid rgba(42, 70, 100, 0.45);
}
.site-nav__list {
  display: flex;
  justify-content: center;
  align-items: stretch;
  gap: clamp(0.3rem, 1.6vw, 1.9rem);
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.site-nav__item { display: block; }
.site-nav__link {
  position: relative;
  display: block;
  padding: 0.92rem 0.3rem;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--mist);
  transition: color var(--dur-fast) var(--ease);
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0.3rem;
  right: 0.3rem;
  bottom: 0.42rem;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform var(--dur) var(--ease);
}
.site-nav__link:hover,
.site-nav__link:focus-visible { color: var(--fg); }
.site-nav__link:hover::after,
.site-nav__link:focus-visible::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] { color: var(--cyan); }
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--cyan);
}

/* 阅读进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--cyan) 42%, var(--orange) 100%);
  opacity: 0.9;
  pointer-events: none;
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 8vw, 6rem);
  padding-top: clamp(2.4rem, 5vw, 4rem);
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 46%, #0A1626 100%);
  border-top: 1px solid rgba(42, 70, 100, 0.65);
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  inset-inline: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan) 24%, var(--orange) 76%, transparent);
  opacity: 0.65;
}
.site-footer::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(48rem 22rem at 14% 0%, rgba(62, 242, 224, 0.10), transparent 68%);
}

.site-footer__inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
  padding-bottom: clamp(1.2rem, 3vw, 2rem);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 4fr) minmax(0, 3fr);
  gap: clamp(1.6rem, 4vw, 3.6rem);
  padding-bottom: clamp(1.8rem, 4vw, 3rem);
  border-bottom: 1px solid rgba(42, 70, 100, 0.5);
}

.site-footer__brand { display: flex; flex-direction: column; align-items: flex-start; }
.site-footer__brand .brand { margin-bottom: 1rem; }
.site-footer__summary {
  max-width: 30ch;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--mist);
}

.site-footer__nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1rem, 3vw, 2.4rem);
}
.site-footer__col { min-width: 0; }
.site-footer__heading {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.24em;
  color: var(--cyan);
  line-height: 1.2;
}
.site-footer__heading::before {
  content: "";
  flex: none;
  width: 0.9rem;
  height: 1px;
  background: currentColor;
}
.site-footer__links { display: flex; flex-direction: column; gap: 0.15rem; }
.footer-link {
  display: inline-block;
  padding: 0.28rem 0;
  font-size: 0.92rem;
  color: var(--mist);
  border-bottom: 1px solid transparent;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.footer-link:hover,
.footer-link:focus-visible {
  color: var(--fg);
  border-bottom-color: var(--cyan);
}

.site-footer__contact { min-width: 0; }
.contact-list { display: grid; gap: 0.55rem; }
.contact-list__item {
  display: grid;
  grid-template-columns: 3.1rem minmax(0, 1fr);
  gap: 0.5rem;
  font-size: 0.9rem;
  line-height: 1.55;
}
.contact-list__label {
  padding-top: 0.12rem;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--mist);
}
.contact-list__value { color: var(--fg); word-break: break-word; }
.contact-list__note {
  max-width: 34ch;
  margin-top: 0.95rem;
  padding-left: 0.7rem;
  border-left: 1px solid var(--orange);
  font-size: 0.78rem;
  line-height: 1.65;
  color: var(--mist);
}

.site-footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem 1.6rem;
  padding-top: 1.35rem;
  font-size: 0.78rem;
  color: var(--mist);
}
.site-footer__copyright {
  max-width: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
}
.site-footer__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 1.15rem;
}
.site-footer__icp {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--mist);
}
.legal-link {
  padding-bottom: 1px;
  border-bottom: 1px solid rgba(42, 70, 100, 0.9);
  color: var(--mist);
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.legal-link:hover,
.legal-link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 7. 通用布局组件 ---------- */
.container {
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.band { padding-block: clamp(2.8rem, 7vw, 6rem); }
.band--sand {
  background: linear-gradient(180deg, #EFE3CC 0%, var(--sand) 100%);
  color: var(--umber);
}
.band--sand h1,
.band--sand h2,
.band--sand h3,
.band--sand h4 { color: var(--umber); }
.band--sand .eyebrow { color: #96441A; }
.band--sand .prose a { color: #96441A; border-bottom-color: rgba(150, 68, 26, 0.45); }

.rule {
  display: block;
  width: 100%;
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--edge), transparent);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
  line-height: 1.4;
}
.eyebrow::before {
  content: "";
  flex: none;
  width: 1.4rem;
  height: 1px;
  background: currentColor;
}

.grid { display: grid; gap: clamp(1rem, 2.6vw, 2.2rem); }
.grid--5-7 { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
.grid--4-8 { grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); }

/* ---------- 8. 通用交互组件 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.85rem 1.5rem;
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  background: rgba(22, 40, 63, 0.65);
  color: var(--fg);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  line-height: 1.2;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease),
    border-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.btn:hover,
.btn:focus-visible { border-color: var(--cyan); transform: translateY(-1px); }
.btn--primary {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--umber);
}
.btn--primary:hover,
.btn--primary:focus-visible {
  background: #FFA271;
  border-color: #FFA271;
  color: var(--umber);
}
.btn--ghost {
  background: transparent;
  border-color: var(--cyan);
  color: var(--cyan);
}
.btn--ghost:hover,
.btn--ghost:focus-visible { background: rgba(62, 242, 224, 0.1); }

.tag {
  display: inline-block;
  padding: 0.22rem 0.6rem;
  border: 1px solid rgba(62, 242, 224, 0.35);
  border-radius: 1px;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
  line-height: 1.5;
}

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

/* 面包屑 */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  padding-block: 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--mist);
}
.breadcrumbs__link { color: var(--mist); transition: color var(--dur-fast) var(--ease); }
.breadcrumbs__link:hover,
.breadcrumbs__link:focus-visible { color: var(--cyan); }
.breadcrumbs__sep { color: var(--edge); }
.breadcrumbs__current { color: var(--fg); }

/* 正文窄栏 */
.prose {
  max-width: var(--w-prose);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--fg);
}
.prose > * + * { margin-top: 1.15em; }
.prose h2 { margin-top: 2.1em; font-size: clamp(1.35rem, 2vw, 1.85rem); }
.prose h3 { margin-top: 1.7em; font-size: 1.12rem; }
.prose a {
  color: var(--cyan);
  border-bottom: 1px solid rgba(62, 242, 224, 0.4);
  transition: border-color var(--dur-fast) var(--ease);
}
.prose a:hover { border-bottom-color: var(--cyan); }
.prose ul li {
  position: relative;
  padding-left: 1.15rem;
  margin-top: 0.5em;
}
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.86em;
  width: 0.55rem;
  height: 1px;
  background: var(--orange);
}
.prose ol { padding-left: 1.15rem; list-style: decimal; }
.prose ol li { margin-top: 0.5em; }

/* 响应式图片容器 */
.figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(42, 70, 100, 0.55);
  border-radius: var(--radius);
  background: var(--slate);
}
.figure__media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: linear-gradient(135deg, var(--slate) 0%, var(--ink-2) 100%);
}
.figure__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.figure__media--wide { aspect-ratio: 21 / 9; }
.figure__media--tall { aspect-ratio: 4 / 5; }
.figure__caption {
  padding: 0.7rem 0.9rem;
  border-top: 1px solid rgba(42, 70, 100, 0.5);
  font-size: 0.76rem;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 9. 显现动效 ---------- */
[data-reveal] {
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
  will-change: opacity, transform;
}
html.reveal-enabled [data-reveal]:not(.is-revealed) {
  opacity: 0;
  transform: translateY(16px);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 10. 响应式 ---------- */
@media (max-width: 1023px) {
  .site-footer__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
  .site-footer__contact { grid-column: 1 / -1; }
  .contact-list { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.55rem 1.5rem; }
  .contact-list__note { grid-column: 1 / -1; max-width: 46ch; }
}

@media (max-width: 899px) {
  .masthead__inner {
    grid-template-columns: auto minmax(0, 1fr);
    padding-top: 0.7rem;
    padding-bottom: 0.7rem;
  }
  .masthead__rail { display: none; }
  .brand { justify-self: start; }
  .masthead__meta { justify-self: end; }
  .masthead__tagline { display: none; }
  .nav-toggle { display: inline-flex; }

  .site-nav {
    display: none;
    border-top: 1px solid rgba(42, 70, 100, 0.5);
    background: rgba(9, 21, 36, 0.98);
  }
  .site-nav[data-open] { display: block; }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-block: 0.4rem 0.9rem;
  }
  .site-nav__link {
    padding: 0.85rem 0.25rem;
    border-bottom: 1px solid rgba(42, 70, 100, 0.35);
    font-size: 0.95rem;
  }
  .site-nav__link::after { display: none; }
  .site-nav__link[aria-current="page"] {
    color: var(--cyan);
    box-shadow: inset 2px 0 0 var(--cyan);
    padding-left: 0.75rem;
  }

  .grid--5-7,
  .grid--4-8 { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 639px) {
  .site-footer__grid { grid-template-columns: minmax(0, 1fr); }
  .site-footer__contact { grid-column: auto; }
  .contact-list { grid-template-columns: minmax(0, 1fr); }
  .site-footer__base { flex-direction: column; align-items: flex-start; }
  .brand__mark { width: 1.45rem; height: 1.45rem; font-size: 0.54rem; }
  .site-nav__link { font-size: 0.92rem; }
}

/* ---------- 11. 降低动态效果 ---------- */
@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;
  }
  html.reveal-enabled [data-reveal]:not(.is-revealed) {
    opacity: 1;
    transform: none;
  }
  [data-reveal] { will-change: auto; }
}