/* ============================================
   Site Kit — 开心体育平台 shared stylesheet
   ============================================ */

/* ---------- Reset ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ---------- Tokens ---------- */
:root {
  --bg-ink: #0b1320;
  --bg-panel: #131c2b;
  --bg-panel-2: #16243a;
  --paper: #f5f0e6;
  --neon: #39ff14;
  --plasma: #ff6b00;
  --text: #e6edf3;
  --text-dim: #8a9bb5;
  --line: #1f3a4d;
  --font-heading: "Anton", "Impact", "Noto Sans SC", sans-serif;
  --font-mono: "Roboto Mono", "SFMono-Regular", Consolas, monospace;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --container-w: 1200px;
  --radius: 2px;
  --header-h: 72px;
  --transition: 0.25s ease;
}

/* ---------- Base ---------- */
html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  background: var(--bg-ink);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}

/* 技术蓝图双级网格 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(31, 58, 77, 0.22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 58, 77, 0.22) 1px, transparent 1px),
    linear-gradient(rgba(31, 58, 77, 0.55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 58, 77, 0.55) 1px, transparent 1px);
  background-size:
    260px 260px,
    260px 260px,
    52px 52px,
    52px 52px;
}

/* 右下角数据坐标刻线 */
body::after {
  content: "";
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 1;
  width: 18px;
  height: 18px;
  border-right: 2px solid rgba(57, 255, 20, 0.28);
  border-bottom: 2px solid rgba(57, 255, 20, 0.28);
  pointer-events: none;
}

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

a {
  color: var(--neon);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--text);
}

button {
  font-family: var(--font-body);
}

ul,
ol {
  list-style: none;
}

address {
  font-style: normal;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: 0.03em;
  color: var(--text);
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
}

h2 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.15rem;
}

p {
  max-width: 70ch;
}

::selection {
  background: var(--neon);
  color: var(--bg-ink);
}

:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
  border-radius: var(--radius);
}

[hidden] {
  display: none !important;
}

/* ---------- Layout ---------- */
#main-content {
  position: relative;
  z-index: 1;
  min-height: 70vh;
}

.container {
  width: min(var(--container-w), 92vw);
  margin-inline: auto;
}

.prose {
  max-width: 72ch;
  margin-inline: auto;
  color: var(--text);
}

.prose > * + * {
  margin-top: 1.25em;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  background: transparent;
  transition:
    background var(--transition),
    color var(--transition),
    border-color var(--transition),
    transform 0.15s ease;
}

.btn-primary {
  background: var(--neon);
  border-color: var(--neon);
  color: var(--bg-ink);
}

.btn-primary:hover {
  background: transparent;
  border-color: var(--neon);
  color: var(--neon);
}

.btn-outline {
  border-color: var(--line);
  color: var(--text);
}

.btn-outline:hover {
  border-color: var(--neon);
  color: var(--neon);
}

.btn:active {
  transform: translateY(2px);
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 20px 0 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 1px;
  color: var(--text-dim);
}

.breadcrumb a {
  color: var(--text-dim);
  text-decoration: none;
  transition: color var(--transition);
}

.breadcrumb a:hover {
  color: var(--neon);
}

.breadcrumb-sep {
  color: var(--line);
  font-weight: 700;
}

.breadcrumb-current {
  color: var(--neon);
}

/* ---------- Section Head ---------- */
.section-head {
  margin-bottom: 36px;
  position: relative;
}

.section-eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--neon);
  background: rgba(57, 255, 20, 0.08);
  border: 1px solid rgba(57, 255, 20, 0.25);
  padding: 4px 12px;
  margin-bottom: 14px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  line-height: 1.15;
  color: var(--text);
}

.section-sub {
  color: var(--text-dim);
  font-size: 1rem;
  max-width: 60ch;
  margin-top: 12px;
}

/* ---------- Cards ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  position: relative;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  transition:
    transform var(--transition),
    border-color var(--transition),
    box-shadow var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(57, 255, 20, 0.4);
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.3),
    0 0 0 1px rgba(57, 255, 20, 0.1);
}

/* ---------- Tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text-dim);
  background: rgba(31, 58, 77, 0.2);
}

.tag::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--neon);
  border-radius: 50%;
}

.tag-warn {
  color: var(--plasma);
  border-color: rgba(255, 107, 0, 0.35);
  background: rgba(255, 107, 0, 0.1);
}

.tag-warn::before {
  background: var(--plasma);
  box-shadow: 0 0 8px rgba(255, 107, 0, 0.6);
}

/* ---------- Data Pair ---------- */
.data-pair {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(31, 58, 77, 0.6);
}

.data-label {
  color: var(--text-dim);
  font-size: 0.85rem;
}

.data-value {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--neon);
}

.data-value[data-accent="warn"] {
  color: var(--plasma);
}

/* ---------- Media Frame ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(rgba(31, 58, 77, 0.42) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 58, 77, 0.42) 1px, transparent 1px),
    linear-gradient(135deg, var(--bg-panel) 0%, var(--bg-panel-2) 100%);
  background-size:
    22px 22px,
    22px 22px,
    auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  aspect-ratio: 16 / 9;
  min-height: 160px;
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 55%, rgba(57, 255, 20, 0.14) 100%);
  pointer-events: none;
}

.media-frame::after {
  content: attr(data-caption);
  position: absolute;
  left: 12px;
  bottom: 10px;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 2px;
  color: var(--neon);
  background: rgba(11, 19, 32, 0.85);
  padding: 4px 10px;
  border-left: 2px solid var(--neon);
}

/* ---------- Tabs ---------- */
.tabs {
  margin: 28px 0;
  border: 1px solid var(--line);
  background: var(--bg-panel);
  border-radius: var(--radius);
}

.tab-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-bottom: 1px solid var(--line);
  background: rgba(11, 19, 32, 0.45);
}

.tab-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 24px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-dim);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 1px;
  cursor: pointer;
  transition:
    color var(--transition),
    border-color var(--transition);
}

.tab-btn::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--line);
  transform: rotate(45deg);
}

.tab-btn:hover {
  color: var(--text);
}

.tab-btn[aria-selected="true"] {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

.tab-btn[aria-selected="true"]::before {
  background: var(--neon);
}

.tab-panel {
  padding: 28px;
  animation: tabIn 0.35s ease;
}

.tab-panel[hidden] {
  display: none;
}

@keyframes tabIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- Scroll Progress ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1200;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--neon), var(--plasma));
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
}

/* ---------- Skip Link ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 8px;
  z-index: 2000;
  padding: 10px 20px;
  background: var(--neon);
  color: var(--bg-ink);
  font-weight: 600;
  border-radius: var(--radius);
}

.skip-link:focus {
  left: 8px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1100;
  background: rgba(11, 19, 32, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-topline {
  height: 3px;
  background: linear-gradient(90deg, var(--neon) 0%, var(--line) 45%, var(--plasma) 100%);
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: var(--header-h);
}

.brand {
  flex-shrink: 0;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--text);
}

.brand-link:hover {
  color: var(--text);
}

.brand-mark {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border: 2px solid var(--neon);
  border-radius: 4px;
  background: linear-gradient(135deg, var(--neon) 0%, var(--neon) 49%, var(--bg-ink) 50%, var(--bg-ink) 100%);
  transform: rotate(45deg);
  box-shadow: 0 0 12px rgba(57, 255, 20, 0.35);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand-text strong {
  font-size: 1.2rem;
  letter-spacing: 1px;
  color: var(--text);
  white-space: nowrap;
}

.brand-text span {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 3px;
  color: var(--neon);
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 10px 16px;
  border: 1px solid transparent;
  color: var(--text-dim);
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 1.2px;
  text-decoration: none;
  transition:
    color var(--transition),
    background var(--transition),
    border-color var(--transition);
}

.nav-link::before {
  content: attr(data-index);
  margin-right: 6px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--plasma);
  vertical-align: 2px;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 100%;
  bottom: 5px;
  height: 2px;
  background: var(--neon);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.5);
  transition: right 0.3s ease;
}

.nav-link:hover {
  color: var(--text);
}

.nav-link:hover::after {
  right: 16px;
}

.nav-link[aria-current="page"] {
  color: var(--neon);
}

.nav-link[aria-current="page"]::after {
  left: 16px;
  right: 16px;
}

.nav-cta {
  margin-left: 12px;
  border: 1px solid var(--neon);
  border-radius: var(--radius);
  color: var(--neon);
  background: rgba(57, 255, 20, 0.06);
}

.nav-cta:hover {
  background: var(--neon);
  color: var(--bg-ink);
}

.header-status {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 16px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 2px;
  color: var(--neon);
  white-space: nowrap;
}

.header-status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 10px var(--neon);
  animation: pulse 2s ease infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.35;
  }
}

.nav-toggle {
  display: none;
}

/* ---------- Footer ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: 80px;
  background: var(--bg-panel);
  border-top: 1px solid var(--line);
}

.footer-accent {
  height: 3px;
  background: linear-gradient(90deg, var(--neon), var(--line) 35%, var(--plasma));
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding: 56px 0 40px;
}

.footer-col > * + * {
  margin-top: 14px;
}

.footer-brand-name {
  font-family: var(--font-heading);
  font-size: 1.55rem;
  line-height: 1.2;
  letter-spacing: 1px;
  color: var(--text);
}

.footer-tagline {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--neon);
}

.footer-desc {
  max-width: 44ch;
  color: var(--text-dim);
  font-size: 0.9rem;
  line-height: 1.8;
}

.footer-cert {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-dim);
  font-size: 0.85rem;
}

.cert-badge {
  display: inline-block;
  padding: 3px 8px;
  background: var(--neon);
  color: var(--bg-ink);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 1px;
  border-radius: var(--radius);
}

.footer-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text);
}

.footer-title::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--neon);
  transform: rotate(45deg);
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  display: inline-block;
  color: var(--text-dim);
  font-size: 0.9rem;
  transition:
    color var(--transition),
    transform var(--transition);
}

.footer-links a:hover {
  color: var(--neon);
  transform: translateX(4px);
}

.footer-contact {
  margin-top: 18px;
  color: var(--text-dim);
  font-size: 0.85rem;
  line-height: 1.9;
}

.footer-contact span {
  display: block;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 10px 24px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 1px;
}

/* ---------- Grid Helpers ---------- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 920px) {
  .header-status {
    display: none;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    margin-left: 0;
    padding: 14px 24px 20px;
    background: rgba(11, 19, 32, 0.97);
    border-bottom: 1px solid var(--line);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition:
      transform 0.3s ease,
      opacity 0.3s ease,
      visibility 0.3s ease;
  }

  .site-nav[data-open="true"] {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: 14px 12px;
    font-size: 0.95rem;
    border-bottom: 1px solid rgba(31, 58, 77, 0.4);
  }

  .nav-link::after {
    left: 12px;
  }

  .nav-link:hover::after,
  .nav-link[aria-current="page"]::after {
    right: 12px;
  }

  .nav-cta {
    margin-left: 0;
    margin-top: 12px;
    justify-content: center;
    border-radius: var(--radius);
  }

  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 42px;
    height: 42px;
    padding: 10px;
    margin-left: auto;
    background: var(--bg-panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    cursor: pointer;
    z-index: 1200;
  }

  .nav-toggle-line {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition:
      transform 0.3s ease,
      opacity 0.3s ease;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}

@media (max-width: 800px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
    padding: 40px 0 24px;
  }

  .footer-brand {
    padding-right: 0;
  }
}

@media (max-width: 620px) {
  body::after {
    display: none;
  }

  .card-grid,
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .brand-text strong {
    font-size: 1rem;
  }
}

/* ---------- 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;
  }
}