/* ==========================================================================
   买球网赛场 · /assets/site.css
   共享外壳：reset / 设计令牌 / 中文排版 / 头部 / 页脚 / 通用组件
   ========================================================================== */

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

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

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

button, input, select, textarea { font: inherit; color: inherit; }

button { padding: 0; border: 0; background: none; cursor: pointer; }

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

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

/* ------------------------------------------------------------- 2. 设计令牌 */
:root {
  /* 色彩：夜间球场 */
  --ink: #0B1F17;
  --ink-2: #12362A;
  --ink-3: #0E2A20;
  --glow: #3DF2C8;
  --gold: #F0B429;
  --signal: #E5484D;
  --paper: #F4F7F5;
  --slate: #8FA39A;
  --black: #050A08;
  --reflex: #1F5A43;

  /* 线条与阴影：粗野主义 */
  --line: 1px solid rgba(143, 163, 154, 0.28);
  --line-bold: 2px solid var(--reflex);
  --line-glow: 2px solid rgba(61, 242, 200, 0.45);
  --shadow-hard: 6px 6px 0 var(--black);
  --shadow-hard-sm: 4px 4px 0 var(--black);

  /* 字体 */
  --font-display: "Arial Narrow", "Helvetica Neue Condensed", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", "Courier New", monospace;

  /* 版面 */
  --shell: 1260px;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --nav-pad: clamp(0.6rem, 1.6vw, 1.35rem);
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

/* ---------------------------------------------------------- 3. 基础与排版 */
body {
  min-height: 100vh;
  background:
    radial-gradient(1100px 620px at 88% -12%, rgba(31, 90, 67, 0.55), transparent 64%),
    radial-gradient(760px 420px at 4% 8%, rgba(61, 242, 200, 0.07), transparent 60%),
    var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.96rem + 0.18vw, 1.1rem);
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper);
  text-wrap: balance;
}

h1 { font-size: clamp(2rem, 6vw, 4.5rem); }
h2 { font-size: clamp(1.55rem, 3.4vw, 2.6rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.6rem); }
h4 { font-size: clamp(1rem, 1.4vw, 1.2rem); line-height: 1.3; }

:focus-visible {
  outline: 3px solid var(--glow);
  outline-offset: 3px;
}

::selection {
  background: var(--glow);
  color: var(--black);
}

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

.section { padding-block: clamp(2.5rem, 6vw, 5rem); }
.section--tight { padding-block: clamp(1.5rem, 3vw, 2.5rem); }

.stack { display: grid; gap: clamp(1rem, 2vw, 1.75rem); }

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
  gap: clamp(1rem, 2.5vw, 2rem);
}

.prose {
  display: grid;
  gap: 1.1rem;
  max-width: 72ch;
}
.prose p, .prose li { color: rgba(244, 247, 245, 0.86); }

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

.skip-link {
  position: absolute;
  top: -5rem;
  left: 1rem;
  z-index: 120;
  padding: 0.75rem 1.25rem;
  background: var(--glow);
  color: var(--black);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  border: 2px solid var(--black);
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 0.75rem; }

/* --------------------------------------------------------- 5. 文字与标记 */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--glow);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--glow);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--slate);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  line-height: 1.5;
  color: var(--slate);
}
.tag--glow { border-color: var(--glow); color: var(--glow); }
.tag--gold { border-color: var(--gold); color: var(--gold); }
.tag--signal { border-color: var(--signal); color: var(--signal); }

.breadcrumbs { padding-block: 0.9rem; border-bottom: var(--line); }
.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--slate);
}
.breadcrumbs__list li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--reflex);
}
.breadcrumbs__link { color: var(--slate); transition: color 0.15s var(--ease); }
.breadcrumbs__link:hover { color: var(--glow); }
.breadcrumbs__current { color: var(--paper); }

/* ------------------------------------------------------------ 6. 通用组件 */
.btn {
  --btn-bg: var(--glow);
  --btn-fg: var(--black);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.3rem;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--font-body);
  font-weight: 800;
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  line-height: 1.4;
  border: 2px solid var(--black);
  box-shadow: var(--shadow-hard-sm);
  transition: transform 0.16s var(--ease), box-shadow 0.16s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease);
}
.btn:hover { transform: translate(-2px, -2px); box-shadow: var(--shadow-hard); }
.btn:active { transform: translate(2px, 2px); box-shadow: 2px 2px 0 var(--black); }

.btn--gold { --btn-bg: var(--gold); --btn-fg: #17200A; }
.btn--gold:hover { --btn-bg: var(--glow); --btn-fg: var(--black); }

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--paper);
  border-color: var(--slate);
  box-shadow: none;
}
.btn--ghost:hover {
  --btn-fg: var(--glow);
  border-color: var(--glow);
  box-shadow: var(--shadow-hard-sm);
}

.card {
  position: relative;
  padding: clamp(1rem, 2vw, 1.5rem);
  background: var(--ink-2);
  border: var(--line-bold);
  box-shadow: var(--shadow-hard-sm);
  transition: border-color 0.18s var(--ease), box-shadow 0.18s var(--ease), transform 0.18s var(--ease);
}
.card:hover {
  border-color: var(--glow);
  box-shadow: var(--shadow-hard);
  transform: translate(-2px, -2px);
}
.card__meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--slate);
}

.data-band {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: clamp(0.75rem, 2vw, 2rem);
  padding: clamp(1rem, 2.5vw, 1.75rem);
  background: var(--ink-2);
  border: var(--line-bold);
  border-left: 6px solid var(--glow);
}

.stat { display: grid; gap: 0.2rem; }
.stat__value {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.5rem, 7vw, 5.5rem);
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: var(--glow);
  font-variant-numeric: tabular-nums;
}
.stat__value--gold { color: var(--gold); }
.stat__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--slate);
}

/* ------------------------------------------------------------ 7. 图片容器 */
.media {
  position: relative;
  overflow: hidden;
  background: var(--ink-2);
  border: var(--line-bold);
  box-shadow: var(--shadow-hard-sm);
}
.media__img {
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.08) brightness(0.96);
  transition: filter 0.25s var(--ease), transform 0.35s var(--ease);
}
.media:hover .media__img { filter: saturate(1.05) contrast(1.12) brightness(1.02); }
.media--wide .media__img { aspect-ratio: 21 / 9; }
.media--tall .media__img { aspect-ratio: 3 / 4; }
.media--square .media__img { aspect-ratio: 1 / 1; }

.media__caption {
  padding: 0.7rem 1rem;
  border-top: var(--line);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--slate);
}
.media__tag { position: absolute; top: 0.75rem; left: 0.75rem; z-index: 2; }
.media__placeholder {
  display: grid;
  place-items: center;
  aspect-ratio: 16 / 9;
  background: repeating-linear-gradient(135deg, var(--ink-2) 0 14px, var(--ink) 14px 28px);
  color: var(--slate);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
}

/* ----------------------------------------------------------- 8. 共享头部 */
.site-header {
  position: relative;
  z-index: 40;
  background:
    linear-gradient(180deg, rgba(31, 90, 67, 0.38), transparent 62%),
    var(--ink);
  border-bottom: var(--line-bold);
}

.header-strip {
  background: var(--black);
  border-bottom: 1px solid rgba(143, 163, 154, 0.18);
}
.header-strip__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.35rem 1.5rem;
  padding-block: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--slate);
}
.header-strip__item { display: inline-flex; align-items: center; gap: 0.55rem; }
.header-strip__item--accent { color: var(--glow); }
.header-strip__item--accent::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--glow);
  box-shadow: 0 0 0 3px rgba(61, 242, 200, 0.16);
}

.masthead {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 2rem);
  padding-block: clamp(1.25rem, 3.5vw, 2.5rem);
}
.masthead__center {
  grid-column: 2;
  display: grid;
  justify-items: center;
  gap: 0.5rem;
  text-align: center;
}
.masthead__kicker {
  font-family: var(--font-mono);
  font-size: clamp(0.66rem, 1.1vw, 0.8rem);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--slate);
}
.masthead__brand {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 6.4vw, 4.8rem);
  line-height: 0.94;
  letter-spacing: -0.03em;
  color: var(--paper);
  background-image: linear-gradient(var(--glow), var(--glow));
  background-repeat: no-repeat;
  background-size: 0% 4px;
  background-position: 0 100%;
  transition: background-size 0.28s var(--ease), color 0.2s var(--ease);
}
.masthead__brand:hover,
.masthead__brand:focus-visible {
  color: var(--glow);
  background-size: 100% 4px;
}
.masthead__tagline {
  font-size: clamp(0.82rem, 1.3vw, 1rem);
  letter-spacing: 0.04em;
  color: var(--slate);
}
.masthead__cta { grid-column: 3; justify-self: end; }

.nav-toggle {
  grid-column: 1;
  justify-self: start;
  display: none;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 1rem;
  background: var(--ink-2);
  color: var(--paper);
  border: 2px solid var(--slate);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  transition: border-color 0.16s var(--ease), color 0.16s var(--ease), background 0.16s var(--ease);
}
.nav-toggle:hover { border-color: var(--glow); color: var(--glow); }
.nav-toggle[aria-expanded="true"] {
  border-color: var(--glow);
  color: var(--black);
  background: var(--glow);
}
.nav-toggle__bars { display: grid; gap: 4px; width: 18px; }
.nav-toggle__bars span { display: block; height: 2px; background: currentColor; }
.nav-toggle__label { line-height: 1; }

.site-nav {
  background: var(--ink-2);
  border-top: var(--line);
  border-bottom: 1px solid rgba(5, 10, 8, 0.6);
}
.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.site-nav__item { display: block; }
.site-nav__link {
  position: relative;
  display: block;
  padding: 0.95rem var(--nav-pad);
  font-size: clamp(0.9rem, 1.6vw, 1rem);
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--paper);
  transition: color 0.15s var(--ease);
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: var(--nav-pad);
  right: var(--nav-pad);
  bottom: 0.5rem;
  height: 2px;
  background: var(--glow);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s var(--ease);
}
.site-nav__link:hover,
.site-nav__link:focus-visible { color: var(--glow); }
.site-nav__link:hover::after,
.site-nav__link:focus-visible::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] { color: var(--glow); }
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--gold);
}

/* ----------------------------------------------------------- 9. 共享页脚 */
.site-footer {
  margin-top: clamp(3rem, 8vw, 6rem);
  background: var(--black);
  border-top: var(--line-bold);
  color: var(--slate);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 0.9fr)) minmax(0, 1.5fr);
  gap: clamp(1.5rem, 3vw, 2.5rem);
  padding-block: clamp(2.5rem, 5vw, 4rem);
}

.footer-brand {
  display: grid;
  align-content: start;
  gap: 0.5rem;
  padding-left: 1rem;
  border-left: 4px solid var(--glow);
}
.footer-brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--paper);
}
.footer-brand__sub {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--slate);
}
.footer-brand__meta { font-size: 0.88rem; line-height: 1.7; color: rgba(143, 163, 154, 0.92); }

.footer-col { display: grid; align-content: start; }
.footer-col__title {
  margin-bottom: 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid rgba(61, 242, 200, 0.28);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  color: var(--glow);
}
.footer-col__list { display: grid; gap: 0.55rem; }

.footer-link {
  display: inline-block;
  padding-bottom: 2px;
  color: var(--paper);
  font-size: 0.95rem;
  background-image: linear-gradient(var(--glow), var(--glow));
  background-repeat: no-repeat;
  background-size: 0% 2px;
  background-position: 0 100%;
  transition: color 0.18s var(--ease), background-size 0.22s var(--ease);
}
.footer-link:hover,
.footer-link:focus-visible {
  color: var(--glow);
  background-size: 100% 2px;
}
.footer-link--strong { font-family: var(--font-mono); font-size: 0.82rem; color: var(--glow); }

.footer-contact { display: grid; align-content: start; gap: 0.8rem; }
.footer-contact__list { display: grid; gap: 0.65rem; }
.footer-contact__item { display: grid; gap: 0.15rem; }
.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--slate);
}
.footer-contact__value {
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}
.footer-contact__value--mono { font-family: var(--font-mono); letter-spacing: 0.03em; }
.footer-contact__note { font-size: 0.82rem; line-height: 1.7; color: rgba(143, 163, 154, 0.85); }

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1.5rem;
  padding-block: 1.25rem;
  border-top: 1px solid rgba(143, 163, 154, 0.2);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--slate);
}
.footer-base__links { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; }
.footer-base__links .footer-link { font-size: 0.72rem; letter-spacing: 0.1em; color: var(--slate); }
.footer-base__links .footer-link:hover { color: var(--glow); }

/* ------------------------------------------------- 10. 滚动进度与返回顶部 */
.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 3px;
  z-index: 60;
  pointer-events: none;
}
.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--glow), var(--gold));
  transition: width 0.1s linear;
}

.to-top {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  z-index: 55;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1rem;
  background: var(--ink-2);
  color: var(--paper);
  border: 2px solid var(--glow);
  box-shadow: var(--shadow-hard-sm);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), transform 0.18s var(--ease);
}
.to-top:hover { background: var(--glow); color: var(--black); transform: translate(-2px, -2px); }
.to-top[hidden] { display: none; }

/* --------------------------------------------------------- 11. 显现动效 */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
[data-reveal].is-visible { opacity: 1; transform: none; }

/* --------------------------------------------------------- 12. 响应式断点 */
@media (max-width: 1100px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand,
  .footer-contact { grid-column: span 2; }
}

@media (max-width: 899px) {
  .masthead {
    grid-template-columns: minmax(0, 1fr);
    justify-items: center;
    gap: 1rem;
    padding-block: 1.5rem;
  }
  .masthead__center { grid-column: 1; order: 1; }
  .nav-toggle { grid-column: 1; justify-self: center; order: 2; display: inline-flex; }
  .masthead__cta { grid-column: 1; justify-self: center; order: 3; }

  .site-nav { display: none; }
  .site-nav[data-open] { display: block; animation: nav-drop 0.2s var(--ease); }
  .site-nav__list { flex-direction: column; padding-inline: 0; padding-block: 0.4rem; }
  .site-nav__item { border-bottom: 1px solid rgba(143, 163, 154, 0.14); }
  .site-nav__item:last-child { border-bottom: 0; }
  .site-nav__link { padding: 0.95rem var(--gutter); font-size: 1rem; }
  .site-nav__link::after { display: none; }
  .site-nav__link[aria-current="page"] { box-shadow: inset 4px 0 0 var(--gold); }

  .header-strip__inner { justify-content: flex-start; }
}

@keyframes nav-drop {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

@media (max-width: 599px) {
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-brand,
  .footer-contact { grid-column: span 1; }
  .data-band { flex-direction: column; align-items: flex-start; }
  .btn { width: 100%; }
  .to-top { left: clamp(1rem, 3vw, 2rem); right: auto; }
}

/* --------------------------------------------------------- 13. 减少动效 */
@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;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .scroll-progress { display: none; }
  .masthead__brand { background-size: 100% 4px; }
}