/* =========================================================
   万象城体育平台 · P9HX SPORTS
   /assets/site.css
   全站共享层：设计令牌 / 头部 / 页脚 / 通用组件 / 动效支撑
   ========================================================= */

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

/* ---------- Design Tokens ---------- */
:root {
  --c-bg: #0A0E1A;
  --c-bg-panel: rgba(255, 255, 255, 0.04);
  --c-glass: rgba(255, 255, 255, 0.06);
  --c-glass-strong: rgba(255, 255, 255, 0.1);
  --c-line: rgba(255, 255, 255, 0.08);
  --c-line-green: rgba(0, 255, 157, 0.4);
  --c-line-purple: rgba(180, 77, 255, 0.4);
  --c-line-blue: rgba(0, 212, 255, 0.4);
  --c-green: #00FF9D;
  --c-purple: #B44DFF;
  --c-blue: #00D4FF;
  --c-yellow: #FFC857;
  --c-red: #FF5E5E;
  --c-white: #F5F7FF;
  --c-muted: #A0A8C0;
  --c-dim: #66707F;

  --font-sans: 'Noto Sans SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'Roboto Mono', 'JetBrains Mono', 'SF Mono', 'Cascadia Code', Consolas, 'Courier New', monospace;

  --container-max: 1360px;
  --header-top: 16px;
  --header-h: 54px;
  --header-space: 28px;

  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-10: 40px;
  --sp-12: 48px;
  --sp-16: 64px;
  --sp-20: 80px;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  --shadow-glass: 0 12px 40px rgba(0, 0, 0, 0.35);
  --glow-green: 0 0 20px rgba(0, 255, 157, 0.2);
  --glow-purple: 0 0 20px rgba(180, 77, 255, 0.2);
  --glow-blue: 0 0 20px rgba(0, 212, 255, 0.2);

  --ease-fast: 160ms cubic-bezier(0.2, 0.8, 0.3, 1);
  --ease-slow: 360ms cubic-bezier(0.2, 0.8, 0.3, 1);

  --z-progress: 1200;
  --z-skip: 1100;
  --z-header: 1000;
  --z-backtop: 980;
}

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.7;
  color: var(--c-white);
  background-color: var(--c-bg);
  background-image:
    radial-gradient(ellipse at 85% 4%, rgba(180, 77, 255, 0.09), transparent 50%),
    radial-gradient(ellipse at 6% 96%, rgba(0, 212, 255, 0.06), transparent 45%),
    linear-gradient(180deg, rgba(0, 0, 0, 0.12), transparent);
  background-attachment: fixed;
  padding-top: calc(var(--header-top) + var(--header-h) + var(--header-space));
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 900;
  line-height: 1.25;
  color: var(--c-white);
  margin-bottom: var(--sp-4);
}

h1 { font-size: clamp(34px, 5.5vw, 72px); letter-spacing: 0.02em; }
h2 { font-size: clamp(24px, 3.5vw, 44px); }
h3 { font-size: clamp(18px, 1.8vw, 24px); }
h4 { font-size: 18px; }

p { margin-bottom: var(--sp-4); }

a {
  color: var(--c-blue);
  text-decoration: none;
  transition: color var(--ease-fast);
}
a:hover { color: var(--c-green); }

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

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

button {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

input {
  font: inherit;
  border: none;
  outline: none;
}

::selection {
  background: var(--c-green);
  color: #03100A;
}

#main-content {
  scroll-margin-top: calc(var(--header-top) + var(--header-h) + var(--sp-4));
}

/* ---------- Utilities ---------- */
.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--sp-6);
}

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

.page-section {
  padding-block: var(--sp-16);
}

/* ---------- Accessibility ---------- */
:focus-visible {
  outline: 3px solid var(--c-green);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: fixed;
  top: var(--sp-3);
  left: var(--sp-3);
  z-index: var(--z-skip);
  padding: 10px 22px;
  background: var(--c-green);
  color: #03100A;
  font-weight: 800;
  font-size: 14px;
  border-radius: var(--radius-pill);
  box-shadow: var(--glow-green);
  transform: translateY(-200%);
  transition: transform var(--ease-fast);
}
.skip-link:focus-visible {
  transform: translateY(0);
}

/* ---------- Scroll Progress ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: var(--z-progress);
  background: linear-gradient(90deg, var(--c-green), var(--c-blue), var(--c-purple));
  transform: scaleX(var(--progress, 0));
  transform-origin: left 0;
  pointer-events: none;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: var(--header-top);
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-header);
  width: max-content;
  max-width: calc(100% - 24px);
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding: 10px 10px 10px var(--sp-5);
  background: rgba(10, 14, 26, 0.78);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

/* Brand */
.brand {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1px;
  flex-shrink: 0;
  line-height: 1.2;
  color: var(--c-white);
}
.brand:hover {
  color: var(--c-white);
}
.brand-name {
  font-size: 17px;
  font-weight: 900;
  letter-spacing: 0.03em;
  white-space: nowrap;
  color: var(--c-white);
}
.brand-accent {
  color: var(--c-green);
}
.brand-mono {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--c-blue);
}

/* Navigation Pill */
.nav-pill {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
}

.nav-link {
  position: relative;
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--c-muted);
  border-radius: var(--radius-pill);
  white-space: nowrap;
  transition: color var(--ease-fast), background var(--ease-fast);
}
.nav-link:hover {
  color: var(--c-white);
  background: var(--c-glass);
}
.nav-link::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: var(--glow-green);
  opacity: 0;
  transition: opacity var(--ease-fast);
}
.nav-link[aria-current="page"] {
  color: var(--c-white);
  font-weight: 800;
}
.nav-link[aria-current="page"]::before {
  opacity: 1;
}

/* Search + CTA group */
.nav-panel-tools {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-left: auto;
  padding-left: var(--sp-4);
  border-left: 1px solid var(--c-line);
}

.search-box {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  width: 190px;
  padding: 6px 14px;
  background: var(--c-glass);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-pill);
  transition: border-color var(--ease-fast), box-shadow var(--ease-fast), width var(--ease-slow);
}
.search-box:focus-within {
  border-color: var(--c-line-green);
  box-shadow: var(--glow-green);
  width: 220px;
}
.search-box input {
  width: 100%;
  background: transparent;
  color: var(--c-white);
  font-size: 13px;
}
.search-box input::placeholder {
  color: var(--c-dim);
}
.search-icon {
  flex-shrink: 0;
  color: var(--c-blue);
  display: inline-flex;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 9px 18px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--c-white);
  background: var(--c-glass);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-pill);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--ease-fast), border-color var(--ease-fast), box-shadow var(--ease-fast), transform var(--ease-fast), color var(--ease-fast);
}
.btn:hover {
  color: var(--c-white);
  background: var(--c-glass-strong);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.btn-cta {
  background: linear-gradient(135deg, rgba(0, 255, 157, 0.16), rgba(180, 77, 255, 0.12));
  border-color: var(--c-line-purple);
}
.btn-cta:hover {
  border-color: var(--c-purple);
  box-shadow: var(--glow-purple);
  background: linear-gradient(135deg, rgba(0, 255, 157, 0.24), rgba(180, 77, 255, 0.18));
}

/* Mobile Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  background: var(--c-glass);
  border: 1px solid var(--c-line);
  border-radius: 50%;
  transition: background var(--ease-fast), border-color var(--ease-fast);
}
.nav-toggle:hover {
  background: var(--c-glass-strong);
  border-color: var(--c-line-green);
}
.nav-toggle-line {
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--c-white);
  transition: transform var(--ease-fast), opacity var(--ease-fast);
}
.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);
}

/* ---------- Footer ---------- */
.site-footer {
  position: relative;
  margin-top: var(--sp-20);
  background: linear-gradient(180deg, rgba(10, 14, 26, 0.92), #070A13);
  border-top: 1px solid var(--c-line);
}
.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(180, 77, 255, 0.08), transparent 70%);
  pointer-events: none;
}

.footer-edge {
  position: relative;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--c-green) 30%, var(--c-purple) 70%, transparent);
  opacity: 0.5;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
  gap: var(--sp-8) var(--sp-10);
  padding-block: var(--sp-12) var(--sp-8);
}

.footer-col {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.footer-col .brand {
  margin-bottom: var(--sp-4);
}

.footer-trust {
  display: inline-flex;
  align-items: flex-start;
  gap: var(--sp-2);
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-green);
  margin-bottom: var(--sp-3);
}
.trust-dot {
  flex-shrink: 0;
  width: 7px;
  height: 7px;
  margin-top: 6px;
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: var(--glow-green);
}

.footer-promise {
  font-size: 13px;
  color: var(--c-muted);
  line-height: 1.7;
  margin-bottom: 0;
}

.footer-heading {
  position: relative;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-white);
  margin-bottom: var(--sp-5);
  padding-bottom: var(--sp-2);
}
.footer-heading::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 22px;
  height: 2px;
  background: linear-gradient(90deg, var(--c-green), var(--c-purple));
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.footer-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 400;
  color: var(--c-muted);
  transition: color var(--ease-fast), padding-left var(--ease-fast);
}
.footer-link:hover {
  color: var(--c-green);
  padding-left: 3px;
}

.footer-text {
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-muted);
}

.footer-bottom-bar {
  border-top: 1px solid var(--c-line);
  background: rgba(0, 0, 0, 0.2);
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  flex-wrap: wrap;
  padding-block: var(--sp-4);
}
.footer-copy {
  font-size: 12px;
  color: var(--c-dim);
  margin: 0;
}
.footer-icp {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-dim);
}

/* ---------- Back to Top ---------- */
.back-to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: var(--z-backtop);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  color: var(--c-blue);
  background: rgba(10, 14, 26, 0.82);
  border: 1px solid var(--c-line-blue);
  box-shadow: var(--shadow-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity var(--ease-fast), visibility var(--ease-fast), transform var(--ease-fast), background var(--ease-fast), color var(--ease-fast), border-color var(--ease-fast);
}
.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--c-blue);
  border-color: var(--c-blue);
  color: var(--c-bg);
  box-shadow: var(--glow-blue);
}
.back-to-top svg {
  display: block;
}

/* ---------- Shared Components ---------- */
.panel-glass {
  background: var(--c-glass);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  padding: var(--sp-6);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: transform var(--ease-slow), border-color var(--ease-slow), box-shadow var(--ease-slow);
}
.panel-glass:hover {
  transform: translateY(-3px);
  border-color: var(--c-line-green);
  box-shadow: var(--glow-green);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--c-muted);
  background: var(--c-glass);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-pill);
  white-space: nowrap;
}
.tag[data-tone="green"] {
  color: var(--c-green);
  border-color: var(--c-line-green);
  background: rgba(0, 255, 157, 0.06);
}
.tag[data-tone="purple"] {
  color: var(--c-purple);
  border-color: var(--c-line-purple);
  background: rgba(180, 77, 255, 0.06);
}
.tag[data-tone="blue"] {
  color: var(--c-blue);
  border-color: var(--c-line-blue);
  background: rgba(0, 212, 255, 0.06);
}
.tag[data-tone="yellow"] {
  color: var(--c-yellow);
  border-color: rgba(255, 200, 87, 0.35);
  background: rgba(255, 200, 87, 0.07);
}

.data-value {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--c-green);
  letter-spacing: -0.03em;
}

.img-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--c-line);
  background: linear-gradient(145deg, rgba(0, 212, 255, 0.08), rgba(180, 77, 255, 0.05));
}
.img-frame[data-ratio="wide"] { aspect-ratio: 16 / 9; }
.img-frame[data-ratio="square"] { aspect-ratio: 1 / 1; }
.img-frame[data-ratio="story"] { aspect-ratio: 4 / 5; }
.img-frame > * {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.img-frame::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: inset 0 0 40px rgba(0, 0, 0, 0.15);
  pointer-events: none;
}

.frame-view {
  position: relative;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.01));
  padding: var(--sp-8);
}
.frame-view::before {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  width: 28px;
  height: 28px;
  border-top: 2px solid var(--c-green);
  border-left: 2px solid var(--c-green);
  border-radius: var(--radius-lg) 0 0 0;
}
.frame-view::after {
  content: '';
  position: absolute;
  bottom: -1px;
  right: -1px;
  width: 28px;
  height: 28px;
  border-bottom: 2px solid var(--c-purple);
  border-right: 2px solid var(--c-purple);
  border-radius: 0 0 var(--radius-lg) 0;
}

.section-index {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: var(--sp-8);
  align-items: start;
  margin-bottom: var(--sp-10);
}
.section-index-label {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-purple);
  padding-top: 12px;
}
.section-index-label::before {
  content: '/';
  color: var(--c-green);
  font-weight: 800;
  font-size: 14px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-8);
  font-size: 13px;
  color: var(--c-dim);
}
.breadcrumb a {
  color: var(--c-muted);
}
.breadcrumb a:hover {
  color: var(--c-green);
}
.breadcrumb-sep {
  color: var(--c-dim);
  font-family: var(--font-mono);
}

.grid {
  display: grid;
  gap: var(--sp-6);
}
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ---------- Reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 560ms cubic-bezier(0.2, 0.8, 0.3, 1), transform 560ms cubic-bezier(0.2, 0.8, 0.3, 1);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 1279px) {
  .nav-panel-tools .search-box {
    display: none;
  }
}

@media (max-width: 1023px) {
  :root {
    --header-top: 10px;
    --header-h: 48px;
    --header-space: 14px;
  }

  body {
    background-attachment: scroll;
  }

  .container {
    padding-inline: var(--sp-4);
  }

  .site-header {
    width: calc(100% - 16px);
  }

  .header-inner {
    padding: 8px 8px 8px var(--sp-4);
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-pill {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: var(--sp-4);
    background: rgba(10, 14, 26, 0.96);
    border: 1px solid var(--c-line);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-glass);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity var(--ease-fast), transform var(--ease-fast), visibility var(--ease-fast);
  }
  .nav-pill[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-link {
    padding: 12px 16px;
    font-size: 15px;
    border-radius: var(--radius-md);
  }

  .nav-panel-tools {
    display: flex;
    flex-direction: column;
    gap: var(--sp-3);
    margin-left: 0;
    margin-top: var(--sp-4);
    padding-left: 0;
    padding-top: var(--sp-4);
    border-left: none;
    border-top: 1px solid var(--c-line);
  }
  .nav-panel-tools .search-box {
    display: flex;
    width: 100%;
  }
  .nav-panel-tools .btn-cta {
    width: 100%;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-8) var(--sp-6);
    padding-block: var(--sp-8);
  }

  .grid-cols-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-cols-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 639px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--sp-8);
  }

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

  .section-index {
    grid-template-columns: 1fr;
    gap: var(--sp-3);
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-2);
  }

  .back-to-top {
    right: 16px;
    bottom: 16px;
  }
}

/* ---------- 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;
  }
  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}