/* ==========================================================================
   KAIYUN体育在线 — /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 页头 / 页脚 / 基础组件
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 6.5rem;
}

body {
  margin: 0;
  min-height: 100%;
  background: #0B2E20;
  color: #F4F0E6;
  font-family: "Noto Sans SC", "Source Han Sans", "Inter", system-ui, sans-serif;
  font-size: 1.05rem;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, video, canvas { display: block; max-width: 100%; }
main { display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { padding: 0; background: none; border: 0; cursor: pointer; }
table { width: 100%; border-collapse: collapse; border-spacing: 0; }
hr { margin: 0; border: 0; border-top: 1px solid rgba(154, 165, 160, 0.25); }

/* ---------- 2. 变量 ---------- */
:root {
  --c-pitch-deep: #0B2E20;
  --c-pitch: #124A33;
  --c-flare: #FF6A1A;
  --c-signal: #E5322D;
  --c-warn: #F5C518;
  --c-cream: #F4F0E6;
  --c-gray: #9AA5A0;
  --c-brown: #1A1613;
  --c-white: #FFFFFF;
  --c-teal: #2DD4BF;

  --font-sans: "Noto Sans SC", "Source Han Sans", "Inter", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", "Roboto Mono", monospace;

  --fs-h1: clamp(3rem, 8vw, 6rem);
  --fs-h2: clamp(2rem, 4vw, 3.2rem);
  --fs-h3: 1.5rem;
  --fs-body: 1.05rem;
  --fs-metric: clamp(3.5rem, 10vw, 7rem);
  --fs-label: 0.72rem;

  --lh-tight: 1.05;
  --lh-body: 1.75;
  --ls-label: 0.12em;
  --ls-data: 0.02em;

  --shell-max: 1360px;
  --gutter: clamp(1rem, 4vw, 3rem);
  --radius-sm: 4px;
  --radius-md: 14px;
  --radius-lg: 28px;

  --hair: rgba(154, 165, 160, 0.22);
  --hair-strong: rgba(154, 165, 160, 0.42);
  --header-h: 4.75rem;
}

/* ---------- 3. 焦点与无障碍 ---------- */
:focus-visible {
  outline: 3px solid var(--c-flare);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -120px;
  z-index: 200;
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 1.15rem;
  background: var(--c-flare);
  color: #10251B;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  border-radius: var(--radius-sm);
  transition: top 0.2s ease;
}
.skip-link:focus { top: 0.75rem; }

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

.section { padding-block: clamp(2.5rem, 6vw, 5rem); }
.section--tight { padding-block: clamp(1.25rem, 3vw, 2rem); }

.grid { display: grid; gap: clamp(1rem, 2.4vw, 1.75rem); }
.grid--two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--asym { grid-template-columns: minmax(0, 7fr) minmax(0, 3fr); }

@media (max-width: 1024px) {
  .grid--three,
  .grid--four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--asym { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 640px) {
  .grid--two,
  .grid--three,
  .grid--four { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 5. 排版 ---------- */
h1, .h1 {
  font-size: var(--fs-h1);
  line-height: var(--lh-tight);
  font-weight: 900;
  letter-spacing: -0.01em;
}
h2, .h2 {
  font-size: var(--fs-h2);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.005em;
}
h3, .h3 {
  font-size: var(--fs-h3);
  line-height: 1.28;
  font-weight: 700;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--c-teal);
}
.eyebrow::before {
  content: "";
  flex: none;
  width: 18px;
  height: 2px;
  background: var(--c-flare);
}

.prose { max-width: 66ch; }
.prose p + p { margin-top: 1.1em; }
.prose h2 { margin-top: 2.2em; }
.prose h3 { margin-top: 1.8em; }
.prose ul,
.prose ol { margin-top: 1.1em; padding-left: 1.15em; list-style: disc; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.4em; }

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

.link-plain {
  color: var(--c-flare);
  border-bottom: 1px solid rgba(255, 106, 26, 0.4);
  transition: border-color 0.18s ease;
}
.link-plain:hover { border-bottom-color: var(--c-flare); }

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.68rem 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  white-space: nowrap;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  transition: background-color 0.18s ease, color 0.18s ease,
    border-color 0.18s ease, transform 0.18s ease;
}
.btn--accent {
  background: var(--c-flare);
  color: #10251B;
  font-weight: 700;
}
.btn--accent:hover { background: #FF8B45; transform: translateY(-1px); }
.btn--ghost {
  border-color: var(--hair-strong);
  color: var(--c-cream);
}
.btn--ghost:hover { border-color: var(--c-flare); color: var(--c-flare); }
.btn:active { transform: translateY(0); }

/* ---------- 7. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  color: var(--c-cream);
  background:
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.022) 0 1px, transparent 1px 8px),
    linear-gradient(180deg, #0C3122 0%, #0A2A1D 100%);
  box-shadow: inset 0 -2px 0 rgba(255, 106, 26, 0.45), 0 16px 32px -24px rgba(0, 0, 0, 0.95);
}

.header-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 2rem);
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: 0.85rem var(--gutter);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  flex: 0 0 auto;
  min-width: 0;
}
.brand-mark {
  display: grid;
  place-items: center;
  flex: none;
  width: 42px;
  height: 42px;
  background: var(--c-flare);
  color: #10251B;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  clip-path: polygon(0 0, 100% 0, 100% 70%, 72% 100%, 0 100%);
}
.brand-copy {
  display: flex;
  flex-direction: column;
  min-width: 0;
  line-height: 1.12;
}
.brand-name {
  color: var(--c-white);
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  color: var(--c-gray);
  white-space: nowrap;
}

.primary-nav { margin-left: auto; }
.nav-list { display: flex; align-items: center; gap: 0.15rem; }
.nav-link {
  position: relative;
  display: inline-block;
  padding: 0.5rem 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: rgba(244, 240, 230, 0.76);
  border-radius: 3px;
  white-space: nowrap;
  transition: color 0.18s ease, background-color 0.18s ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0.8rem;
  right: 0.8rem;
  bottom: 0.22rem;
  height: 2px;
  background: var(--c-flare);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.24s ease;
}
.nav-link:hover { color: var(--c-white); background: rgba(255, 255, 255, 0.04); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link[aria-current="page"] { color: var(--c-flare); }
.nav-link[aria-current="page"]::after { transform: scaleX(1); }

.header-side {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  flex: 0 0 auto;
}
.header-status {
  padding-left: 0.9rem;
  border-left: 1px solid var(--hair-strong);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--c-gray);
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  flex: none;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid var(--hair-strong);
  border-radius: var(--radius-sm);
  transition: border-color 0.18s ease;
}
.nav-toggle:hover { border-color: var(--c-flare); }
.nav-toggle-bars {
  position: relative;
  display: block;
  width: 20px;
  height: 2px;
  background: var(--c-cream);
  transition: background-color 0.2s ease;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: var(--c-cream);
  transition: transform 0.22s ease;
}
.nav-toggle-bars::before { top: -6px; }
.nav-toggle-bars::after { top: 6px; }

.site-header[data-open="true"] .nav-toggle-bars { background: transparent; }
.site-header[data-open="true"] .nav-toggle-bars::before { transform: translateY(6px) rotate(45deg); }
.site-header[data-open="true"] .nav-toggle-bars::after { transform: translateY(-6px) rotate(-45deg); }

.header-rule {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  overflow: hidden;
  pointer-events: none;
}
.header-rule-fill {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--c-flare);
  transform: scaleX(0);
  transform-origin: left center;
  will-change: transform;
}

@media (max-width: 1080px) {
  .header-status { display: none; }
}

@media (max-width: 960px) {
  .nav-toggle { display: grid; order: 3; }
  .header-side { order: 2; margin-left: auto; }

  .primary-nav {
    order: 4;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    margin-left: 0;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    background: linear-gradient(180deg, #0C3122 0%, #082117 100%);
    border-top: 1px solid var(--hair);
    box-shadow: 0 30px 44px -28px rgba(0, 0, 0, 0.95);
  }
  .site-header[data-open="true"] .primary-nav { display: block; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem var(--gutter) 1.25rem;
  }
  .nav-link {
    display: block;
    padding: 0.9rem 0.25rem;
    font-size: 0.86rem;
    border-bottom: 1px solid var(--hair);
    border-radius: 0;
  }
  .nav-link::after { display: none; }
  .nav-link[aria-current="page"] {
    padding-left: 0.75rem;
    border-left: 3px solid var(--c-flare);
    background: rgba(255, 106, 26, 0.1);
  }
}

@media (max-width: 520px) {
  .header-side .btn { display: none; }
  .brand-sub { display: none; }
}

/* ---------- 8. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 8vw, 7rem);
  color: var(--c-cream);
  background:
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.018) 0 1px, transparent 1px 10px),
    linear-gradient(180deg, #0A2A1D 0%, #061A11 100%);
  box-shadow: inset 0 2px 0 rgba(255, 106, 26, 0.55);
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
  gap: clamp(2rem, 6vw, 5rem);
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: clamp(2.5rem, 6vw, 4.5rem) var(--gutter) clamp(2rem, 4vw, 3rem);
}

.footer-ledger { max-width: 42ch; }

.footer-brand {
  color: var(--c-white);
  font-size: clamp(1.35rem, 2.6vw, 1.95rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 0.01em;
}
.footer-tagline {
  margin-top: 0.75rem;
  font-size: 0.9rem;
  color: var(--c-gray);
}

.footer-contact {
  display: grid;
  gap: 0.3rem;
  margin-top: 1.75rem;
}
.footer-label {
  display: block;
  margin-bottom: 0.35rem;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--c-flare);
}
.footer-contact-line {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  letter-spacing: 0.03em;
  color: rgba(244, 240, 230, 0.82);
  word-break: break-word;
}
.footer-note {
  margin-top: 0.85rem;
  max-width: 34ch;
  font-size: 0.76rem;
  line-height: 1.65;
  color: var(--c-gray);
}

.footer-map {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: clamp(1.5rem, 4vw, 3rem);
  align-content: start;
}
.footer-col { min-width: 0; }
.footer-col-title {
  margin-bottom: 0.9rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid rgba(45, 212, 191, 0.28);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--c-teal);
}
.footer-links { display: grid; gap: 0.5rem; }
.footer-links a {
  display: inline-block;
  font-size: 0.9rem;
  color: rgba(244, 240, 230, 0.72);
  transition: color 0.18s ease, transform 0.18s ease;
}
.footer-links a:hover { color: var(--c-flare); transform: translateX(3px); }
.footer-links a[aria-current="page"] { color: var(--c-flare); }

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: 1.1rem var(--gutter) 1.6rem;
  border-top: 1px solid var(--hair);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--c-gray);
}
.footer-copy,
.footer-icp { margin: 0; }

@media (max-width: 900px) {
  .footer-inner { grid-template-columns: minmax(0, 1fr); }
  .footer-ledger { max-width: none; }
}

/* ---------- 9. 基础组件 ---------- */
.breadcrumb { margin-block: 1.25rem; }
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--c-gray);
}
.breadcrumb li { display: inline-flex; align-items: center; gap: 0.45rem; }
.breadcrumb li + li::before { content: "/"; color: rgba(154, 165, 160, 0.45); }
.breadcrumb a { color: rgba(244, 240, 230, 0.7); transition: color 0.18s ease; }
.breadcrumb a:hover { color: var(--c-flare); }

.card {
  position: relative;
  padding: clamp(1rem, 2.2vw, 1.6rem);
  background: rgba(18, 74, 51, 0.5);
  border: 1px solid rgba(45, 212, 191, 0.16);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.card--cream {
  background: var(--c-cream);
  color: var(--c-brown);
  border-color: rgba(26, 22, 19, 0.12);
}
.card--skew { transform: skewY(-1.6deg); }
.card--skew > * { transform: skewY(1.6deg); }
.card-title {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.35;
}
.card-text {
  margin-top: 0.55rem;
  font-size: 0.92rem;
  color: rgba(244, 240, 230, 0.75);
}
.card--cream .card-text { color: rgba(26, 22, 19, 0.72); }

.tag-row { display: flex; flex-wrap: wrap; gap: 0.4rem; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.28rem 0.62rem;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--c-gray);
  border: 1px solid var(--hair-strong);
  border-radius: 999px;
}
.chip--accent { color: var(--c-flare); border-color: rgba(255, 106, 26, 0.6); }
.chip--warn { color: var(--c-warn); border-color: rgba(245, 197, 24, 0.6); }
.chip--red { color: #FF6F6A; border-color: rgba(229, 50, 45, 0.65); }
.chip--teal { color: var(--c-teal); border-color: rgba(45, 212, 191, 0.55); }

.metric { display: grid; gap: 0.35rem; }
.metric-label {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--c-gray);
}
.metric-value {
  font-family: var(--font-mono);
  font-size: var(--fs-metric);
  font-weight: 700;
  line-height: 1;
  letter-spacing: var(--ls-data);
  font-variant-numeric: tabular-nums;
  color: var(--c-white);
}
.metric-value--accent { color: var(--c-flare); }

.media {
  position: relative;
  isolation: isolate;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #124A33 0%, #0B2E20 100%);
}
.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.04) 0 1px, transparent 1px 9px);
}
.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }
.media-caption {
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--c-gray);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}
.data-table th,
.data-table td {
  padding: 0.7rem 0.75rem;
  text-align: left;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--hair);
}
.data-table th {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--c-teal);
}
.data-table td.num { font-family: var(--font-mono); }
.data-table tbody tr { transition: background-color 0.16s ease; }
.data-table tbody tr:hover { background: rgba(255, 106, 26, 0.07); }

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding-block: 0.5rem;
}
.filter-btn {
  padding: 0.42rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(244, 240, 230, 0.7);
  border: 1px solid var(--hair-strong);
  border-radius: 999px;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}
.filter-btn:hover { color: var(--c-white); border-color: var(--c-flare); }
.filter-btn[aria-pressed="true"] {
  color: #10251B;
  font-weight: 700;
  background: var(--c-flare);
  border-color: var(--c-flare);
}
.filter-count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--c-gray);
}
[data-filtered-out] { display: none !important; }

html[data-js="on"] [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s cubic-bezier(0.2, 0.7, 0.3, 1);
}
html[data-js="on"] [data-reveal][data-visible] {
  opacity: 1;
  transform: none;
}

.to-top {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  z-index: 70;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: #10251B;
  background: var(--c-flare);
  border-radius: 50%;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s ease;
}
.to-top[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

/* ---------- 10. 动效降级 ---------- */
@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;
    scroll-behavior: auto !important;
  }
  html[data-js="on"] [data-reveal] {
    opacity: 1;
    transform: none;
  }
  .card--skew { transform: none; }
  .card--skew > * { transform: none; }
  .footer-links a:hover { transform: none; }
}