/* =========================================================
   K体育赛场 · 全站共享样式 /assets/site.css
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body, h1, h2, h3, h4, h5, p, ul, ol, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; }
[hidden] { display: none !important; }

/* ---------- 2. Tokens ---------- */
:root {
  --ink-900: #071A12;
  --ink-800: #0E2018;
  --ink-700: #143326;
  --lime: #B8FF4A;
  --amber: #FFB02E;
  --red: #FF4D5E;
  --flag: #FFE14A;
  --mist: #EEF7EC;
  --moss: #A8B8AD;
  --line: #2B4538;
  --cream: #FFF1D8;

  --rail-w: clamp(218px, 19vw, 258px);
  --topbar-h: 66px;
  --wrap: 1180px;

  --r-lg: 32px;
  --r-md: 22px;
  --r-sm: 14px;

  --font-display: "Barlow Condensed", "Archivo Narrow", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* ---------- 3. Base ---------- */
body {
  min-height: 100vh;
  padding-left: var(--rail-w);
  background: var(--ink-900);
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.005em;
}
h1 { font-size: clamp(38px, 5.6vw, 84px); }
h2 { font-size: clamp(26px, 3.2vw, 44px); }
h3 { font-size: clamp(19px, 2vw, 26px); }
h4 { font-size: clamp(16px, 1.5vw, 19px); }

strong { font-weight: 700; color: #fff; }
small { font-size: 12px; }
::selection { background: var(--lime); color: var(--ink-900); }

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

#main-content {
  display: block;
  scroll-margin-top: calc(var(--topbar-h) + 12px);
}

/* ---------- 4. Skip link ---------- */
.skip-link {
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 300;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--lime);
  color: #071A12;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transform: translateY(-220%);
  transition: transform 0.18s ease;
}
.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline: 3px solid #071A12;
  outline-offset: 2px;
}

/* ---------- 5. Header / side rail ---------- */
.site-header {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 60;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 22px 16px 20px;
  background:
    radial-gradient(120% 46% at 0% 0%, rgba(184, 255, 74, 0.13), transparent 62%),
    linear-gradient(180deg, #0B241A 0%, var(--ink-900) 48%, var(--ink-800) 100%);
  border-right: 1px solid var(--line);
}

.site-header::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 2px;
  height: 132px;
  background: linear-gradient(180deg, var(--lime), rgba(184, 255, 74, 0));
  pointer-events: none;
}

.rail-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

/* Brand */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.brand__mark {
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 16px 16px 16px 4px;
  background: linear-gradient(145deg, var(--lime), #8FE22E);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  box-shadow: 0 10px 24px rgba(184, 255, 74, 0.22);
}
.brand__meta {
  display: flex;
  flex-direction: column;
  min-width: 0;
  line-height: 1.2;
}
.brand__name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--mist);
  white-space: nowrap;
}
.brand__tag {
  margin-top: 5px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--moss);
  white-space: nowrap;
}

/* Nav toggle (mobile) */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(20, 51, 38, 0.9);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  cursor: pointer;
  transition: border-color 0.16s ease, color 0.16s ease;
}
.nav-toggle:hover { border-color: var(--lime); color: var(--lime); }
.nav-toggle__marks {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 18px;
}
.nav-toggle__marks i {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--lime);
  transition: transform 0.18s ease, opacity 0.18s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__marks i:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__marks i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__marks i:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }
.nav-toggle__text { line-height: 1; }

/* Rail navigation */
.site-nav {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1 1 auto;
  min-height: 0;
  margin-top: 8px;
}
.site-nav__eyebrow {
  margin: 0;
  padding-left: 14px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.28em;
  color: var(--moss);
  text-transform: uppercase;
}
.site-nav__list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.site-nav__item { display: block; }
.site-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 12px 11px 14px;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  color: var(--mist);
  font-size: 14.5px;
  font-weight: 500;
  transition: background 0.16s ease, border-color 0.16s ease, transform 0.16s ease, color 0.16s ease;
}
.site-nav__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 3px;
  height: 0;
  border-radius: 3px;
  background: var(--lime);
  transform: translateY(-50%);
  transition: height 0.16s ease;
}
.site-nav__link:hover {
  background: rgba(184, 255, 74, 0.07);
  border-color: var(--line);
  transform: translateX(2px);
}
.site-nav__link[aria-current="page"] {
  background: linear-gradient(90deg, rgba(184, 255, 74, 0.18), rgba(184, 255, 74, 0.02));
  border-color: rgba(184, 255, 74, 0.42);
  color: #ffffff;
}
.site-nav__link[aria-current="page"]::before { height: 62%; }
.site-nav__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--moss);
}
.site-nav__link[aria-current="page"] .site-nav__num { color: var(--lime); }
.site-nav__label { flex: 1 1 auto; }
.site-nav__dot {
  flex: 0 0 6px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--line);
  transition: background 0.16s ease, box-shadow 0.16s ease;
}
.site-nav__link[aria-current="page"] .site-nav__dot {
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(184, 255, 74, 0.16);
}
.site-nav__foot {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px dashed rgba(43, 69, 56, 0.9);
}

.rail-note {
  margin: 2px 0 0;
  padding-left: 10px;
  border-left: 2px solid var(--amber);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--moss);
}

/* Scroll progress */
.rail-progress {
  position: fixed;
  top: 0;
  left: calc(var(--rail-w) - 3px);
  width: 3px;
  height: 100vh;
  z-index: 70;
  pointer-events: none;
  background: rgba(43, 69, 56, 0.45);
}
.rail-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, var(--lime), var(--amber));
  transform: scaleY(var(--p, 0));
  transform-origin: top center;
  transition: transform 0.1s linear;
}

/* ---------- 6. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-align: center;
  cursor: pointer;
  transition: transform 0.16s ease, background 0.16s ease, color 0.16s ease,
    border-color 0.16s ease, box-shadow 0.16s ease;
}
.btn--lime {
  background: var(--lime);
  color: #071A12;
  box-shadow: 0 10px 24px rgba(184, 255, 74, 0.18);
}
.btn--lime:hover { background: #CDFF76; transform: translateY(-2px); }
.btn--ghost {
  background: transparent;
  color: var(--mist);
  border-color: var(--line);
}
.btn--ghost:hover { border-color: var(--lime); color: var(--lime); transform: translateY(-2px); }
.btn--amber {
  background: var(--amber);
  color: #1A1205;
}
.btn--amber:hover { background: #FFC05C; transform: translateY(-2px); }
.btn--block { width: 100%; }

/* ---------- 7. Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(18px, 3vw, 40px);
}

/* ---------- 8. Breadcrumbs ---------- */
.breadcrumbs {
  max-width: var(--wrap);
  margin: clamp(20px, 3vw, 30px) auto 0;
  padding-inline: clamp(18px, 3vw, 40px);
}
.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--moss);
}
.breadcrumbs__list li {
  display: flex;
  align-items: center;
  gap: 8px;
}
.breadcrumbs__list li + li::before {
  content: "/";
  color: var(--line);
}
.breadcrumbs__link {
  color: var(--moss);
  border-bottom: 1px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}
.breadcrumbs__link:hover { color: var(--lime); border-color: currentColor; }
.breadcrumbs__list [aria-current="page"] { color: var(--mist); }

/* ---------- 9. Media frame ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background:
    repeating-linear-gradient(135deg, rgba(184, 255, 74, 0.055) 0 2px, transparent 2px 12px),
    linear-gradient(140deg, var(--ink-700), #0A1B13);
}
.media-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame__tag {
  position: absolute;
  left: 14px;
  bottom: 14px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(7, 26, 18, 0.84);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}
.media-frame--warm {
  border-color: #E4C89B;
  background:
    repeating-linear-gradient(135deg, rgba(26, 18, 5, 0.05) 0 2px, transparent 2px 12px),
    linear-gradient(140deg, var(--cream), #F2D9AE);
}
.media-frame--warm .media-frame__tag {
  background: rgba(26, 18, 5, 0.82);
  color: var(--cream);
  border-color: rgba(26, 18, 5, 0.4);
}
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--wide { aspect-ratio: 21 / 9; }

/* ---------- 10. Tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(20, 51, 38, 0.6);
  color: var(--moss);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  line-height: 1.5;
  white-space: nowrap;
}
.tag--lime { background: var(--lime); color: #071A12; border-color: var(--lime); }
.tag--amber { background: var(--amber); color: #1A1205; border-color: var(--amber); }
.tag--red { background: var(--red); color: #1A0A0C; border-color: var(--red); }
.tag--yellow { background: var(--flag); color: #1A1705; border-color: var(--flag); }

/* ---------- 11. Tabs ---------- */
.tabs {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  width: max-content;
  max-width: 100%;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(20, 51, 38, 0.55);
}
.tabs__btn {
  padding: 9px 18px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--moss);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}
.tabs__btn:hover:not([aria-selected="true"]) {
  color: var(--mist);
  border-color: var(--line);
}
.tabs__btn[aria-selected="true"] {
  background: var(--lime);
  color: #071A12;
  font-weight: 700;
}
.tabs__panel {
  padding-top: 2px;
  animation: tab-fade 0.22s ease both;
}
@keyframes tab-fade {
  from { opacity: 0; transform: translateX(8px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 12. Reveal ---------- */
html[data-js="on"] [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s ease, transform 0.55s cubic-bezier(0.2, 0.7, 0.3, 1);
}
html[data-js="on"] [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 13. Footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  padding: clamp(40px, 5vw, 72px) clamp(18px, 4vw, 56px) 28px;
  background:
    radial-gradient(120% 70% at 100% 0%, rgba(184, 255, 74, 0.09), transparent 62%),
    linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 72%);
  border-top: 1px solid var(--line);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: min(190px, 42%);
  height: 3px;
  background: linear-gradient(90deg, var(--lime), var(--amber), transparent);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.45fr 0.7fr 0.7fr 1.15fr;
  gap: clamp(26px, 3vw, 46px);
  max-width: var(--wrap);
  margin-inline: auto;
  align-items: start;
}

.footer__brand { display: flex; flex-direction: column; gap: 16px; }
.brand--footer .brand__mark { flex-basis: 40px; width: 40px; height: 40px; font-size: 18px; }

.footer__note {
  max-width: 40ch;
  color: var(--moss);
  font-size: 14px;
  line-height: 1.8;
}

.footer__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.footer__col { display: flex; flex-direction: column; }

.footer__heading {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--lime);
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.footer__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  color: var(--mist);
  font-size: 14.5px;
  border-bottom: 1px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease, transform 0.16s ease;
}
.footer__link::before {
  content: "›";
  color: var(--moss);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
}
.footer__link:hover {
  color: var(--lime);
  border-color: rgba(184, 255, 74, 0.42);
  transform: translateX(3px);
}

.footer__contact {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.contact-line {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 9px 14px;
  border-left: 2px solid var(--line);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: rgba(20, 51, 38, 0.42);
}
.contact-line__key {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--moss);
}
.contact-line__val {
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.6;
  word-break: break-word;
}

.footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  max-width: var(--wrap);
  margin: clamp(30px, 4vw, 54px) auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--moss);
}
.footer__icp { color: var(--mist); }
.footer__copy { color: var(--moss); }
.footer__hours { color: var(--moss); }
.footer__hours--base { flex-basis: 100%; }

/* ---------- 14. Responsive ---------- */
@media (max-width: 1180px) {
  .footer__grid {
    grid-template-columns: 1.3fr 1fr 1fr;
  }
  .footer__contact { grid-column: 1 / -1; }
  .footer__contact .contact-line { flex: 1 1 220px; }
}

@media (max-width: 1023px) {
  :root { --rail-w: 0px; }

  body {
    padding-left: 0;
    padding-top: var(--topbar-h);
  }

  .site-header {
    inset: 0 0 auto 0;
    width: auto;
    height: var(--topbar-h);
    flex-direction: row;
    align-items: center;
    gap: 12px;
    padding: 0 16px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .site-header::after { display: none; }

  .rail-head { flex: 1 1 auto; }
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: fixed;
    left: 0;
    right: 0;
    top: var(--topbar-h);
    bottom: 0;
    z-index: 55;
    margin-top: 0;
    padding: 18px 18px 26px;
    background: linear-gradient(180deg, #0B241A 0%, var(--ink-900) 58%);
    border-top: 1px solid var(--line);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  }
  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
  }

  .site-nav__link { padding: 13px 14px; font-size: 15.5px; }
  .site-nav__foot { margin-top: 18px; }

  .rail-progress {
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    width: auto;
    height: 3px;
  }
  .rail-progress__bar {
    transform: scaleX(var(--p, 0));
    transform-origin: left center;
  }

  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
  .footer__contact { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  .brand__tag { display: none; }
  .brand__mark { flex-basis: 38px; width: 38px; height: 38px; font-size: 17px; }
  .brand__name { font-size: 17px; }

  .footer__grid { grid-template-columns: 1fr; }
  .footer__base { flex-direction: column; align-items: flex-start; }
  .footer__hours--base { flex-basis: auto; }

  .tabs__list { width: 100%; border-radius: var(--r-md); }
  .tabs__btn { flex: 1 1 auto; text-align: center; }
}

@media (max-width: 420px) {
  .footer__icp,
  .footer__copy,
  .footer__hours { font-size: 11px; }
  .contact-line__val { font-size: 12.5px; }
}

/* ---------- 15. Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  html[data-js="on"] [data-reveal] {
    opacity: 1;
    transform: none;
  }
  .rail-progress__bar { transition: none; }
}