/* ============================================================
   STAKE界 /assets/site.css
   全站共享样式：reset / tokens / 排版 / 页头页脚 / 通用组件
   ============================================================ */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

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

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--color-paper);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
}

img, picture, svg, video { display: block; max-width: 100%; height: auto; }
input, button, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }

[hidden] { display: none !important; }

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

::selection { background: var(--color-primary); color: #fff; }

/* ---------- 2. Tokens ---------- */
:root {
  --color-primary: #1E3A8A;
  --color-primary-deep: #0F1F4B;
  --color-accent: #F59E0B;
  --color-accent-soft: #FEF3C7;
  --color-paper: #FDF6E3;
  --color-white: #FFFFFF;
  --color-gray-soft: #F3F4F6;
  --color-gray-border: #E5E7EB;
  --color-text: #1F2937;
  --color-text-muted: #6B7280;
  --color-info: #DBEAFE;
  --font-heading: Impact, "Arial Black", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
  --font-mono: Consolas, "Courier New", "Noto Sans Mono CJK SC", monospace;
  --container-width: 1280px;
  --duration: 160ms;
  --easing: ease;
}

/* ---------- 3. Typography & Base ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 800;
  line-height: 1.3;
  color: var(--color-text);
}
p { margin: 0; }

#main-content {
  flex: 1 0 auto;
  width: 100%;
  scroll-margin-top: 16px;
}
#main-content a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--duration) var(--easing);
}
#main-content a:hover { color: var(--color-accent); }

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

[data-year] { font-family: var(--font-mono); }

/* ---------- 4. Shared Layout ---------- */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 16px;
  padding-right: 16px;
}

.section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 16px;
}
.section--narrow { max-width: 960px; }
.section__head { margin-bottom: 20px; }
.section__title { font-size: 28px; }
.section__title::before {
  content: "// ";
  font-family: var(--font-mono);
  color: var(--color-accent);
}
.section__lead {
  color: var(--color-text-muted);
  max-width: 640px;
  margin-top: 8px;
}

/* ---------- 5. Header ---------- */
.site-header {
  position: relative;
  flex-shrink: 0;
  border-top: 3px solid var(--color-accent);
  background: var(--color-primary);
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -120px;
  left: 16px;
  z-index: 1200;
  background: var(--color-accent);
  color: #111827;
  font-size: 14px;
  font-weight: 700;
  padding: 8px 14px;
  transition: top var(--duration) var(--easing);
}
.skip-link:focus { top: 8px; }

/* Utility bar */
.utility-bar {
  background: var(--color-primary-deep);
  color: rgba(255, 255, 255, 0.78);
  font-size: 12px;
}
.utility-bar__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px 12px;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 4px 16px;
  min-height: 30px;
}
.utility-bar__status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  line-height: 1.4;
}
.status-dot {
  width: 6px;
  height: 6px;
  flex: 0 0 auto;
  background: var(--color-accent);
  border-radius: 0;
  animation: statusPulse 2s var(--easing) infinite;
}
.utility-bar__text { letter-spacing: 0.02em; }
.utility-bar__result {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-accent);
  min-height: 1em;
}
.utility-bar__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}
.utility-bar__link {
  color: rgba(255, 255, 255, 0.8);
  padding: 2px 0;
  border-bottom: 1px solid transparent;
  transition: color var(--duration) var(--easing), border-color var(--duration) var(--easing);
}
.utility-bar__link:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}
.utility-bar__sep { color: rgba(255, 255, 255, 0.25); }
.utility-bar__search {
  width: 180px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  font-size: 12px;
  padding: 4px 8px;
  outline: none;
  transition: border-color var(--duration) var(--easing), background var(--duration) var(--easing), width var(--duration) var(--easing);
}
.utility-bar__search::placeholder { color: rgba(255, 255, 255, 0.4); }
.utility-bar__search::-webkit-search-cancel-button { -webkit-appearance: none; }
.utility-bar__search:hover { border-color: rgba(255, 255, 255, 0.3); }
.utility-bar__search:focus {
  border-color: var(--color-accent);
  background: rgba(255, 255, 255, 0.14);
  width: 220px;
}

/* Header main / brand */
.header-main { background: var(--color-primary); }
.header-main__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 12px 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
}
.brand__mark {
  font-family: var(--font-heading);
  font-size: 26px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.02em;
}
.brand__suffix { color: var(--color-accent); }
.brand__rule {
  display: block;
  width: 2px;
  height: 24px;
  background: var(--color-accent);
}
.brand__tagline {
  font-size: 12px;
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.75);
}

/* Nav toggle */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 6px 12px;
  font-size: 13px;
  line-height: 1;
  transition: border-color var(--duration) var(--easing), background var(--duration) var(--easing);
}
.nav-toggle:hover {
  border-color: var(--color-accent);
  background: rgba(245, 158, 11, 0.1);
}
.nav-toggle[aria-expanded="true"] {
  border-color: var(--color-accent);
  background: rgba(245, 158, 11, 0.15);
}
.nav-toggle__icon {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
}
.nav-toggle__bar {
  display: block;
  width: 16px;
  height: 2px;
  background: #fff;
  transition: transform var(--duration) var(--easing), opacity var(--duration) var(--easing);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }
.nav-toggle__label { font-size: 12px; letter-spacing: 0.05em; }

/* Main navigation */
.site-nav {
  background: var(--color-primary);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.site-nav__list {
  display: flex;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 16px;
}
.site-nav__link {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 44px;
  padding: 0 18px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.82);
  position: relative;
  transition: color var(--duration) var(--easing), background var(--duration) var(--easing);
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 0;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration) var(--easing);
}
.site-nav__link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.04);
}
.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] {
  color: var(--color-accent);
  background: rgba(245, 158, 11, 0.08);
}
.site-nav__code {
  font-family: var(--font-mono);
  font-size: 10px;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.04em;
}
.site-nav__link[aria-current="page"] .site-nav__code { color: var(--color-accent); }

/* Featured slot */
.featured-slot {
  background:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    var(--color-primary-deep);
  background-size: 24px 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.featured-slot__bar {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 6px 16px;
}
.featured-slot__codon { color: var(--color-accent); font-size: 12px; line-height: 1; }
.featured-slot__label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.08em;
}
.featured-slot__label::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--color-accent);
}
.featured-slot__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 0.04em;
}
.featured-slot__toggle {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 12px;
  padding: 3px 8px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.04);
  transition: color var(--duration) var(--easing), border-color var(--duration) var(--easing), background var(--duration) var(--easing);
}
.featured-slot__toggle:hover {
  color: var(--color-accent);
  border-color: rgba(245, 158, 11, 0.5);
  background: rgba(245, 158, 11, 0.1);
}
.featured-slot__panel {
  display: none;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 16px 10px;
}
.featured-slot[data-open] .featured-slot__panel {
  display: block;
  animation: panelReveal var(--duration) var(--easing);
}

/* Shortcut grid */
.shortcut-grid {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 6px;
}
.shortcut {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  text-align: left;
  padding: 4px 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.85);
  transition: background var(--duration) var(--easing), border-color var(--duration) var(--easing), transform var(--duration) var(--easing);
}
.shortcut:hover {
  background: rgba(245, 158, 11, 0.12);
  border-color: rgba(245, 158, 11, 0.4);
}
.shortcut:active { transform: translateY(1px); }
.shortcut__code {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  line-height: 1.5;
}
.shortcut__label {
  font-size: 12px;
  line-height: 1.5;
  white-space: nowrap;
}
.shortcut.is-active {
  background: var(--color-accent);
  border-color: var(--color-accent);
}
.shortcut.is-active .shortcut__code,
.shortcut.is-active .shortcut__label { color: #111827; }

/* ---------- 6. Footer ---------- */
.site-footer {
  flex-shrink: 0;
  background: var(--color-primary-deep);
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
}
.site-footer__main {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 32px;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 36px 16px 24px;
}
.site-footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}
.footer-brand {
  color: #fff;
}
.footer-brand__mark {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 0.02em;
  line-height: 1.2;
}
.footer-brand__suffix { color: var(--color-accent); }
.footer-brand__desc {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.5;
  max-width: 260px;
}
.footer-brand__local {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.45);
  padding-top: 4px;
}
.site-footer__heading {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  margin: 4px 0 12px;
}
.site-footer__links li + li { margin-top: 8px; }
.site-footer__links a {
  color: rgba(255, 255, 255, 0.72);
  transition: color var(--duration) var(--easing), padding-left var(--duration) var(--easing);
}
.site-footer__links a:hover {
  color: var(--color-accent);
  padding-left: 4px;
}
.site-footer__contact li {
  margin-bottom: 8px;
  line-height: 1.5;
}
.site-footer__contact a {
  color: rgba(255, 255, 255, 0.72);
  transition: color var(--duration) var(--easing);
}
.site-footer__contact a:hover { color: var(--color-accent); }
.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.site-footer__bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 16px;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: rgba(255, 255, 255, 0.45);
  letter-spacing: 0.02em;
}

/* ---------- 7. Shared Components ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border: 1px solid var(--color-primary);
  background: transparent;
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
  text-decoration: none;
  transition: background var(--duration) var(--easing), color var(--duration) var(--easing), border-color var(--duration) var(--easing);
}
.btn:hover { background: rgba(30, 58, 138, 0.06); }
.btn--accent {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #111827;
}
.btn--accent:hover {
  background: #d97706;
  border-color: #d97706;
  color: #fff;
}

.breadcrumb {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 14px 16px 0;
}
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  font-size: 13px;
  color: var(--color-text-muted);
}
.breadcrumb__item {
  display: inline-flex;
  align-items: center;
}
.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin: 0 8px;
  color: rgba(107, 114, 128, 0.5);
  font-family: var(--font-mono);
}
.breadcrumb__item a {
  color: var(--color-primary);
  text-decoration: none;
}
.breadcrumb__item a:hover { color: var(--color-accent); }
.breadcrumb__item.is-current {
  color: var(--color-text);
  font-weight: 700;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-border);
  padding: 20px;
  transition: box-shadow var(--duration) var(--easing), border-color var(--duration) var(--easing), transform var(--duration) var(--easing);
}
.card:hover {
  border-color: rgba(30, 58, 138, 0.3);
  box-shadow: 0 8px 24px rgba(15, 31, 75, 0.08);
  transform: translateY(-2px);
}

.image-frame {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-gray-soft);
  border: 1px solid var(--color-gray-border);
  aspect-ratio: 16 / 9;
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: rgba(107, 114, 128, 0.5);
}
.image-frame::after { content: "IMG FRAME"; }
.image-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.panel {
  background: var(--color-white);
  border: 1px solid var(--color-gray-border);
  padding: 24px;
}
.panel--dark {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.status-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  line-height: 1.5;
  padding: 2px 8px;
  background: var(--color-gray-soft);
  border: 1px solid var(--color-gray-border);
  color: var(--color-text-muted);
}
.status-tag--blue {
  background: var(--color-info);
  border-color: rgba(30, 58, 138, 0.15);
  color: var(--color-primary);
}
.status-tag--yellow {
  background: var(--color-accent-soft);
  border-color: rgba(245, 158, 11, 0.3);
  color: #92400e;
}

/* ---------- 8. Keyframes ---------- */
@keyframes statusPulse {
  0% { box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.45); }
  70% { box-shadow: 0 0 0 5px rgba(245, 158, 11, 0); }
  100% { box-shadow: 0 0 0 0 rgba(245, 158, 11, 0); }
}
@keyframes panelReveal {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 9. Responsive ---------- */
@media (max-width: 959px) {
  .nav-toggle { display: inline-flex; }

  .site-nav { display: none; }
  .site-nav[data-open] {
    display: block;
    border-bottom: 2px solid var(--color-accent);
    animation: panelReveal var(--duration) var(--easing);
  }
  .site-nav__list {
    flex-direction: column;
    gap: 0;
    padding: 6px 0;
  }
  .site-nav__link {
    height: auto;
    padding: 10px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }
  .site-nav__link::after { display: none; }
  .site-nav__link[aria-current="page"] { background: rgba(245, 158, 11, 0.15); }

  .shortcut-grid {
    grid-template-columns: repeat(10, 110px);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    padding-bottom: 4px;
  }

  .site-footer__main { grid-template-columns: 1fr 1fr; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 639px) {
  .utility-bar__text { display: none; }
  .utility-bar__actions { gap: 6px; }
  .utility-bar__search { width: 130px; }
  .utility-bar__search:focus { width: 160px; }

  .brand__rule,
  .brand__tagline { display: none; }
  .brand__mark { font-size: 22px; }
  .header-main__inner { padding: 10px 16px; }

  .featured-slot__meta { display: none; }
  .featured-slot__label { letter-spacing: 0.04em; }

  .site-footer__main {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: 28px;
  }
  .site-footer__bottom-inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .card-grid { grid-template-columns: 1fr; }
}

/* ---------- 10. Reduced Motion ---------- */
@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;
  }
}