/* ==========================================================================
   悟空赛事 · 共享样式表 /assets/site.css
   ========================================================================== */

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

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

body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }

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

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

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

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

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

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

/* --- 2. Tokens -------------------------------------------------------- */
:root {
  --c-night: #0B0C0E;
  --c-deep: #16181C;
  --c-ash: #23262B;
  --c-ash-hi: #2C3036;
  --c-iron: #3A3F46;
  --c-mist: #A8AEB6;
  --c-white: #F4F5F7;
  --c-gold: #D9A441;
  --c-gold-hi: #F2CE77;
  --c-flame: #C33A2C;
  --c-flame-hi: #D44433;
  --c-flame-deep: #8E241B;
  --c-data: #2F7A72;

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

  --cut: 22px;
  --cut-sm: 14px;
  --cut-lg: 28px;

  --header-h: 74px;
  --shell: 1360px;
  --gutter: 40px;
  --section-gap: 112px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur-fast: 220ms;
  --dur: 320ms;
  --dur-slow: 420ms;
}

/* --- 3. Base ---------------------------------------------------------- */
body {
  background: var(--c-night);
  color: var(--c-white);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(24deg, rgba(58, 63, 70, 0.14) 0 1px, transparent 1px 36px),
    radial-gradient(1200px 620px at 82% -12%, rgba(217, 164, 65, 0.07), transparent 72%),
    radial-gradient(900px 520px at -12% 104%, rgba(195, 58, 44, 0.055), transparent 72%);
}

main, .site-footer { position: relative; z-index: 1; }

h1, h2, h3, h4 { font-weight: 800; line-height: 1.14; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.6rem, 6vw, 5.4rem); }
h2 { font-size: clamp(1.4rem, 2.4vw, 2.2rem); font-weight: 700; letter-spacing: -0.01em; }
h3 { font-size: clamp(1.1rem, 1.6vw, 1.4rem); font-weight: 700; letter-spacing: -0.01em; }

p { max-width: 68ch; }

.num, .mono, time, code, kbd {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: -0.01em;
}

.num { position: relative; top: -0.02em; }

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

:focus-visible {
  outline: 2px solid var(--c-gold-hi);
  outline-offset: 2px;
}

/* --- 4. Skip link ----------------------------------------------------- */
.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 200;
  padding: 12px 20px;
  background: var(--c-gold);
  color: var(--c-night);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: top var(--dur-fast) var(--ease);
}
.skip-link:focus { top: 16px; }

/* --- 5. Header / frame nav ------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(11, 12, 14, 0.94);
  border-bottom: 1px solid var(--c-iron);
  backdrop-filter: saturate(150%) blur(12px);
  -webkit-backdrop-filter: saturate(150%) blur(12px);
}

.header-rail {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--c-gold) 0%, rgba(217, 164, 65, 0) 70%);
  pointer-events: none;
}

.header-inner {
  position: relative;
  z-index: 2;
  max-width: var(--shell);
  margin-inline: auto;
  min-height: var(--header-h);
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.brand-glyph {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  background: linear-gradient(150deg, rgba(217, 164, 65, 0.2), rgba(217, 164, 65, 0));
  box-shadow: inset 0 0 0 1px var(--c-gold);
  color: var(--c-gold);
  font-size: 18px;
  font-weight: 800;
  line-height: 1;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: box-shadow var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.brand:hover .brand-glyph { box-shadow: inset 0 0 0 1px var(--c-gold-hi); color: var(--c-gold-hi); }

.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name { font-size: 16px; font-weight: 800; letter-spacing: 0.1em; color: var(--c-white); }
.brand-line { margin-top: 4px; font-size: 11px; letter-spacing: 0.02em; color: var(--c-mist); }

.nav { margin-left: auto; }

.nav-list { display: flex; align-items: stretch; gap: 2px; }

.nav-item { display: flex; }

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: var(--header-h);
  padding-inline: 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--c-mist);
  transition: color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.nav-link:hover { color: var(--c-white); background: var(--c-ash); }
.nav-link:active { background: var(--c-ash-hi); }
.nav-link[aria-current="page"] { color: var(--c-white); }
.nav-link[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  bottom: 20px;
  width: 4px;
  background: var(--c-gold);
}

.header-side {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-left: 18px;
  flex: 0 0 auto;
}

.header-note {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-mist);
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--c-white);
  box-shadow: inset 0 0 0 1px var(--c-iron);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: background var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.nav-toggle:hover { background: var(--c-ash); box-shadow: inset 0 0 0 1px var(--c-gold); }
.nav-toggle:active { background: var(--c-ash-hi); }

.nav-toggle-box { display: grid; gap: 5px; width: 20px; }
.nav-toggle-box span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease);
}

.site-header[data-open="true"] .nav-toggle-box span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.site-header[data-open="true"] .nav-toggle-box span:nth-child(2) { opacity: 0; }
.site-header[data-open="true"] .nav-toggle-box span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.scroll-meter {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-gold), var(--c-gold-hi));
  transform: scaleX(0);
  transform-origin: 0 50%;
  z-index: 3;
  pointer-events: none;
}

/* --- 6. Buttons ------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  background: var(--c-ash);
  color: var(--c-white);
  box-shadow: inset 0 0 0 1px var(--c-iron);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease),
              box-shadow var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.btn:hover { background: var(--c-ash-hi); box-shadow: inset 0 0 0 1px var(--c-gold); }
.btn:active { transform: translateY(1px); }

.btn--flame { background: var(--c-flame); color: #FFF5F3; box-shadow: none; }
.btn--flame:hover { background: var(--c-flame-hi); box-shadow: none; }
.btn--flame:active { background: var(--c-flame-deep); }

.btn--gold { background: var(--c-gold); color: var(--c-night); box-shadow: none; }
.btn--gold:hover { background: var(--c-gold-hi); box-shadow: none; }

.btn--ghost { background: transparent; box-shadow: inset 0 0 0 1px var(--c-iron); }
.btn--ghost:hover { background: var(--c-ash); box-shadow: inset 0 0 0 1px var(--c-gold); }

/* --- 7. Layout helpers ------------------------------------------------ */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

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

.divider {
  position: relative;
  height: 1px;
  background: var(--c-iron);
  margin-block: 48px;
}
.divider::after {
  content: "";
  position: absolute;
  left: 0;
  top: -1px;
  width: 64px;
  height: 3px;
  background: var(--c-gold);
  transform: skewX(-24deg);
}

/* --- 8. Cut plates & labels ------------------------------------------ */
.cut { clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%); }
.cut--sm { --cut: var(--cut-sm); }
.cut--lg { --cut: var(--cut-lg); }

.plate {
  position: relative;
  padding: 28px;
  background: var(--c-ash);
  box-shadow: inset 0 0 0 1px var(--c-iron);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.plate:hover { background: var(--c-ash-hi); box-shadow: inset 0 0 0 1px var(--c-gold); }
.plate::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(24deg, transparent 38%, rgba(242, 206, 119, 0.16) 50%, transparent 62%);
  transform: translateX(-125%);
  transition: transform var(--dur-slow) var(--ease);
}
.plate:hover::after { transform: translateX(125%); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--c-gold);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--c-gold);
  transform: skewX(-24deg);
}

.tag-plate {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  background: var(--c-ash);
  color: var(--c-mist);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  box-shadow: inset 0 0 0 1px var(--c-iron);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
}

/* --- 9. Text blocks --------------------------------------------------- */
.lead {
  font-size: clamp(1rem, 1.3vw, 1.15rem);
  line-height: 1.72;
  color: var(--c-mist);
  max-width: 60ch;
}

.prose p + p { margin-top: 1em; }
.prose h2 { margin-top: 2.2em; margin-bottom: 0.6em; }
.prose h3 { margin-top: 1.8em; margin-bottom: 0.5em; }
.prose ul { display: grid; gap: 0.6em; margin-top: 1em; }
.prose li { position: relative; padding-left: 20px; max-width: 68ch; }
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.74em;
  width: 9px;
  height: 2px;
  background: var(--c-gold);
  transform: skewX(-24deg);
}

/* --- 10. Breadcrumb --------------------------------------------------- */
.breadcrumb { font-size: 13px; color: var(--c-mist); }
.breadcrumb-list { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.breadcrumb-item { display: inline-flex; align-items: center; }
.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 8px;
  color: var(--c-iron);
}
.breadcrumb-link { color: var(--c-mist); transition: color var(--dur-fast) var(--ease); }
.breadcrumb-link:hover { color: var(--c-gold); }
.breadcrumb-item[aria-current="page"] { color: var(--c-white); }

/* --- 11. Media frames ------------------------------------------------- */
.media {
  position: relative;
  overflow: hidden;
  background: linear-gradient(150deg, #1B1E23, #101215);
  box-shadow: inset 0 0 0 1px var(--c-iron);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}
.media > img { width: 100%; height: 100%; object-fit: cover; }
.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(66deg, rgba(11, 12, 14, 0.72) 0%, rgba(11, 12, 14, 0) 58%);
}
.media--wide { aspect-ratio: 21 / 9; }
.media--std { aspect-ratio: 16 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }

/* --- 12. Expandable groups -------------------------------------------- */
.expand-head {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 18px 22px;
  text-align: left;
  background: var(--c-ash);
  color: var(--c-white);
  font-size: 16px;
  font-weight: 600;
  box-shadow: inset 0 0 0 1px var(--c-iron);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: background var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.expand-head:hover { background: var(--c-ash-hi); box-shadow: inset 0 0 0 1px var(--c-gold); }
.expand-head:active { background: var(--c-ash-hi); }
.expand-head[aria-expanded="true"] { box-shadow: inset 4px 0 0 0 var(--c-gold), inset 0 0 0 1px var(--c-iron); }

.expand-caret {
  margin-left: auto;
  width: 10px;
  height: 10px;
  flex: 0 0 10px;
  border-right: 2px solid var(--c-gold);
  border-bottom: 2px solid var(--c-gold);
  transform: rotate(-45deg);
  transition: transform var(--dur-fast) var(--ease);
}
.expand-head[aria-expanded="true"] .expand-caret { transform: rotate(45deg); }

.expand-panel {
  height: 0;
  overflow: hidden;
  transition: height var(--dur) var(--ease);
  color: var(--c-mist);
}
.expand-panel > * { padding: 18px 22px 4px; }

/* --- 13. Footer ------------------------------------------------------- */
.site-footer {
  margin-top: var(--section-gap);
  background: var(--c-deep);
  border-top: 1px solid var(--c-iron);
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: min(260px, 42%);
  height: 2px;
  background: linear-gradient(90deg, var(--c-gold), rgba(217, 164, 65, 0));
}
.site-footer::after {
  content: "";
  position: absolute;
  right: -40px;
  top: 0;
  width: 320px;
  height: 100%;
  pointer-events: none;
  opacity: 0.6;
  background: repeating-linear-gradient(66deg, rgba(58, 63, 70, 0.5) 0 1px, transparent 1px 30px);
}

.footer-inner {
  position: relative;
  z-index: 1;
  max-width: var(--shell);
  margin-inline: auto;
  padding: 72px var(--gutter) 44px;
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(0, 2.2fr);
  gap: 56px;
}

.footer-brand-name {
  display: inline-block;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--c-white);
}
.footer-brand-name::after {
  content: "";
  display: block;
  width: 38px;
  height: 3px;
  margin-top: 12px;
  background: var(--c-gold);
  transform: skewX(-24deg);
}
.footer-brand-line { margin-top: 14px; font-size: 13px; color: var(--c-mist); max-width: 26ch; }
.footer-service { margin-top: 12px; font-size: 13px; line-height: 1.75; color: var(--c-mist); max-width: 34ch; }

.footer-cols { display: grid; grid-template-columns: 1.15fr 1fr 0.8fr; gap: 32px; }

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--c-gold);
}

.footer-list { display: grid; gap: 10px; margin-top: 18px; }

.footer-link {
  position: relative;
  display: inline-block;
  font-size: 14px;
  color: var(--c-mist);
  transition: color var(--dur-fast) var(--ease);
}
.footer-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 0;
  height: 1px;
  background: var(--c-gold);
  transition: width var(--dur-fast) var(--ease);
}
.footer-link:hover { color: var(--c-white); }
.footer-link:hover::after { width: 100%; }

.footer-base {
  position: relative;
  z-index: 1;
  max-width: var(--shell);
  margin-inline: auto;
  padding: 22px var(--gutter) 40px;
  border-top: 1px solid var(--c-iron);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 32px;
}
.footer-contact { font-size: 12.5px; line-height: 1.75; color: var(--c-mist); max-width: 82ch; }
.footer-legal {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-mist);
  white-space: nowrap;
}

/* --- 14. Reveal protocol --------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}
[data-reveal].is-in { opacity: 1; transform: none; }

/* --- 15. Breakpoints -------------------------------------------------- */
@media (max-width: 1180px) {
  .header-note { display: none; }
}

@media (max-width: 1100px) {
  :root { --gutter: 28px; --section-gap: 88px; }
  .footer-inner { grid-template-columns: 1fr; gap: 44px; }
}

@media (max-width: 900px) {
  :root { --header-h: 64px; }

  .header-inner { gap: 12px; padding-inline: 16px; }
  .header-side { margin-left: auto; gap: 10px; }
  .nav-toggle { display: inline-flex; }
  .brand-line { display: none; }
  .header-note { display: none; }

  .nav {
    position: fixed;
    left: 0;
    right: 0;
    top: var(--header-h);
    margin-left: 0;
    background: var(--c-deep);
    border-bottom: 1px solid var(--c-iron);
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    visibility: hidden;
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease), visibility var(--dur-fast);
  }
  .site-header[data-open="true"] .nav {
    visibility: visible;
    opacity: 1;
    transform: none;
    pointer-events: auto;
  }

  .nav-list { flex-direction: column; gap: 0; padding: 10px 0 22px; }
  .nav-item { display: block; }
  .nav-link { height: 56px; width: 100%; padding-inline: 22px; font-size: 16px; }
  .nav-link[aria-current="page"] { background: var(--c-ash); }
  .nav-link[aria-current="page"]::before { top: 0; bottom: 0; }

  .grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  :root { --gutter: 18px; --section-gap: 64px; }
  body { font-size: 16px; }
  .btn { padding: 10px 16px; font-size: 14px; letter-spacing: 0.02em; }
  .plate { padding: 20px; }
  .footer-inner { padding-top: 56px; }
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; }
  .footer-col:last-child { grid-column: 1 / -1; }
  .footer-base { flex-direction: column; align-items: flex-start; }
  .footer-legal { white-space: normal; }
}

@media (max-width: 520px) {
  .header-side .btn { display: none; }
  .footer-cols { grid-template-columns: 1fr; }
  .footer-col:last-child { grid-column: auto; }
}

/* --- 16. Reduced motion ---------------------------------------------- */
@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;
    transition-delay: 0ms !important;
  }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
  .plate::after { display: none; }
}