/* =============================================
   site.css — 宝威体育 共享样式表
   version: 1.0
   ============================================= */

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; border: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { min-height: 100vh; background: #0A0F1E; color: #F0F4F8; font-family: 'Inter','Microsoft YaHei','PingFang SC',sans-serif; font-weight: 400; line-height: 1.6; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
img, svg { display: block; max-width: 100%; height: auto; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; cursor: pointer; border: none; }
input, textarea { font: inherit; color: inherit; }

/* ---------- CSS Variables ---------- */
:root {
  --color-primary: #003D7A;
  --color-primary-hover: #005299;
  --color-secondary: #FF6B35;
  --color-secondary-hover: #e85a2a;
  --color-accent: #FFD700;
  --color-accent-hover: #e6c200;
  --color-bg-dark: #0A0F1E;
  --color-bg-medium: #1A2332;
  --color-bg-light: #2C3A4A;
  --color-text-primary: #F0F4F8;
  --color-text-secondary: #A0B0C0;
  --color-border: #3A4A5A;
  --color-warm-mist: #F5E6D3;
  --color-deep-brown: #1A1410;

  --font-heading: 'Inter','Microsoft YaHei',sans-serif;
  --font-body: 'Inter','Microsoft YaHei','PingFang SC',sans-serif;
  --font-mono: 'JetBrains Mono','SF Mono',monospace;

  --weight-heading: 800;
  --weight-body: 400;
  --weight-bold: 700;
  --weight-medium: 500;

  --size-xs: 0.75rem;
  --size-sm: 0.875rem;
  --size-base: 1rem;
  --size-lg: 1.25rem;
  --size-xl: 1.5rem;
  --size-2xl: 2rem;
  --size-3xl: 2.5rem;
  --size-4xl: 3rem;

  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  --header-height: 64px;
  --frame-border-width: 3px;
  --max-width: 1280px;
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ---------- Accessibility ---------- */
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.skip-link { position: absolute; top: -100%; left: var(--spacing-md); padding: var(--spacing-sm) var(--spacing-md); background: var(--color-secondary); color: #fff; font-weight: var(--weight-bold); z-index: 10000; border-radius: var(--radius-sm); transition: top var(--transition-fast); }
.skip-link:focus { top: var(--spacing-sm); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
  html { scroll-behavior: auto; }
}

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); font-weight: var(--weight-heading); letter-spacing: -0.02em; line-height: 1.1; color: var(--color-text-primary); }
h1 { font-size: var(--size-4xl); }
h2 { font-size: var(--size-3xl); }
h3 { font-size: var(--size-2xl); }
h4 { font-size: var(--size-xl); }
h5 { font-size: var(--size-lg); }
h6 { font-size: var(--size-base); }
p { margin-bottom: var(--spacing-md); }
small { font-size: var(--size-sm); color: var(--color-text-secondary); }
.numbers { font-family: var(--font-mono); font-weight: var(--weight-medium); font-variant-numeric: tabular-nums; }

/* ---------- Site Header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--header-height);
  background: linear-gradient(135deg, #0A0F1E 0%, #003D7A 100%);
  border-bottom: var(--frame-border-width) solid var(--color-accent);
  box-shadow: 0 2px 20px rgba(0,0,0,0.6), inset 0 0 60px rgba(255,215,0,0.04);
  display: flex; align-items: stretch;
}
.header__inner {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; max-width: var(--max-width); margin: 0 auto;
  padding: 0 var(--spacing-xl); position: relative;
}
.header__brand { flex-shrink: 0; display: flex; align-items: center; }
.brand__link { display: flex; align-items: center; padding: var(--spacing-xs) 0; }
.brand__svg { height: 36px; width: auto; display: block; }
.header__nav { display: flex; align-items: center; }
.nav__list { display: flex; gap: var(--spacing-xs); align-items: center; }
.nav__link {
  display: inline-block; padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-heading); font-weight: var(--weight-bold); font-size: var(--size-sm);
  color: var(--color-text-primary); letter-spacing: 0.02em;
  border-radius: var(--radius-sm); transition: background var(--transition-fast), color var(--transition-fast);
  position: relative;
}
.nav__link::after {
  content: ''; position: absolute; bottom: 4px; left: var(--spacing-md); right: var(--spacing-md);
  height: 2px; background: var(--color-accent); transform: scaleX(0); transition: transform var(--transition-fast);
}
.nav__link:hover { background: rgba(255,255,255,0.08); color: var(--color-accent); }
.nav__link:hover::after { transform: scaleX(1); }
.nav__link[aria-current="page"] { color: var(--color-accent); background: rgba(255,215,0,0.1); }
.nav__link[aria-current="page"]::after { transform: scaleX(1); background: var(--color-secondary); }
.header__toggle { display: none; flex-direction: column; gap: 5px; padding: var(--spacing-sm); cursor: pointer; background: none; border: none; }
.toggle__bar { display: block; width: 24px; height: 2px; background: var(--color-text-primary); border-radius: 2px; transition: transform var(--transition-fast), opacity var(--transition-fast); }
.header__frame { position: absolute; bottom: calc(-1 * var(--frame-border-width)); left: 0; right: 0; height: var(--frame-border-width); background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 50%, var(--color-secondary) 100%); pointer-events: none; }

/* ---------- Mobile Nav ---------- */
@media (max-width: 768px) {
  .header__toggle { display: flex; }
  .header__nav {
    position: fixed; top: var(--header-height); left: 0; right: 0; bottom: 0;
    background: rgba(10,15,30,0.98); backdrop-filter: blur(12px);
    transform: translateX(100%); transition: transform var(--transition-base);
    display: flex; align-items: center; justify-content: center; z-index: 999;
    padding: var(--spacing-2xl);
  }
  .header__nav[data-open] { transform: translateX(0); }
  .nav__list { flex-direction: column; gap: var(--spacing-lg); text-align: center; }
  .nav__link { font-size: var(--size-xl); padding: var(--spacing-md) var(--spacing-xl); }
  .nav__link::after { left: var(--spacing-xl); right: var(--spacing-xl); }
  .header__toggle[aria-expanded="true"] .toggle__bar:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .header__toggle[aria-expanded="true"] .toggle__bar:nth-child(2) { opacity: 0; transform: scaleX(0); }
  .header__toggle[aria-expanded="true"] .toggle__bar:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
}

/* ---------- Site Footer ---------- */
.site-footer {
  background: linear-gradient(180deg, #0A0F1E 0%, #001a33 100%);
  border-top: 2px solid var(--color-border);
  color: var(--color-text-secondary); position: relative;
  padding: var(--spacing-3xl) var(--spacing-xl) var(--spacing-lg);
}
.footer__inner { max-width: var(--max-width); margin: 0 auto; display: flex; flex-direction: column; gap: var(--spacing-xl); }
.footer__brand { display: flex; flex-direction: column; gap: var(--spacing-md); align-items: flex-start; }
.footer__logo { height: 28px; width: auto; }
.footer__trust { font-size: var(--size-sm); color: var(--color-text-secondary); max-width: 560px; line-height: 1.7; margin: 0; }
.footer__links { display: flex; align-items: center; gap: var(--spacing-md); flex-wrap: wrap; }
.footer__link { font-size: var(--size-sm); font-weight: var(--weight-bold); color: var(--color-text-primary); transition: color var(--transition-fast); position: relative; padding: var(--spacing-xs) 0; }
.footer__link::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 1px; background: var(--color-accent); transform: scaleX(0); transition: transform var(--transition-fast); }
.footer__link:hover { color: var(--color-accent); }
.footer__link:hover::after { transform: scaleX(1); }
.footer__sep { color: var(--color-border); font-size: var(--size-sm); user-select: none; }
.footer__meta { display: flex; flex-direction: column; gap: var(--spacing-xs); padding-top: var(--spacing-md); border-top: 1px solid var(--color-border); font-size: var(--size-sm); }
.footer__contact { margin: 0; }
.footer__contact-link { color: var(--color-text-primary); border-bottom: 1px dotted var(--color-primary); transition: color var(--transition-fast); }
.footer__contact-link:hover { color: var(--color-accent); border-bottom-color: var(--color-accent); }
.footer__address { margin: 0; color: var(--color-text-secondary); }
.footer__note { margin: 0; font-style: italic; color: var(--color-text-secondary); opacity: 0.8; }
.footer__icp { margin: var(--spacing-sm) 0 0; font-size: var(--size-xs); color: var(--color-text-secondary); opacity: 0.7; }
.footer__base { position: absolute; bottom: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--color-primary), var(--color-accent), var(--color-secondary)); pointer-events: none; }

@media (max-width: 768px) {
  .site-footer { padding: var(--spacing-2xl) var(--spacing-md) var(--spacing-md); }
  .footer__links { gap: var(--spacing-sm); }
  .footer__sep { display: none; }
  .footer__link { width: 100%; text-align: center; padding: var(--spacing-xs) 0; }
  .footer__brand { align-items: center; text-align: center; }
  .footer__trust { max-width: 100%; }
  .footer__meta { text-align: center; }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .site-footer { padding: var(--spacing-2xl) var(--spacing-lg) var(--spacing-md); }
}

/* ---------- Progress Bar ---------- */
.progress-bar {
  position: fixed; top: var(--header-height); left: 0; height: 3px; z-index: 999;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent), var(--color-secondary));
  width: 0%; pointer-events: none; transition: width 0.1s linear;
}
@media (prefers-reduced-motion: reduce) {
  .progress-bar { display: none; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg); border-radius: var(--radius-md);
  font-family: var(--font-heading); font-weight: var(--weight-bold); font-size: var(--size-sm);
  letter-spacing: 0.02em; transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  cursor: pointer; text-decoration: none; line-height: 1.4;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0,0,0,0.3); }
.btn:active { transform: translateY(0); }
.btn--primary { background: var(--color-primary); color: var(--color-text-primary); }
.btn--primary:hover { background: var(--color-primary-hover); }
.btn--secondary { background: var(--color-secondary); color: #fff; }
.btn--secondary:hover { background: var(--color-secondary-hover); }
.btn--outline { background: transparent; color: var(--color-text-primary); border: 1px solid var(--color-border); }
.btn--outline:hover { border-color: var(--color-accent); color: var(--color-accent); }
.btn--sm { font-size: var(--size-xs); padding: var(--spacing-xs) var(--spacing-md); }
.btn--lg { font-size: var(--size-base); padding: var(--spacing-md) var(--spacing-xl); }

/* ---------- Cards ---------- */
.card {
  background: var(--color-bg-medium); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--spacing-lg);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}
.card:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.4); border-color: var(--color-primary); }
.card--glass { background: rgba(26,35,50,0.7); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }
.card--highlight { border-color: var(--color-accent); box-shadow: 0 0 20px rgba(255,215,0,0.06); }
.card__title { font-size: var(--size-lg); font-weight: var(--weight-heading); margin-bottom: var(--spacing-sm); }
.card__value { font-family: var(--font-mono); font-size: var(--size-2xl); font-weight: var(--weight-bold); color: var(--color-accent); }
.card__label { font-size: var(--size-sm); color: var(--color-text-secondary); }

/* ---------- Data Grid ---------- */
.data-grid {
  display: grid; gap: var(--spacing-lg);
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}
@media (max-width: 480px) {
  .data-grid { grid-template-columns: 1fr; }
}

/* ---------- Legend ---------- */
.legend { display: flex; flex-wrap: wrap; gap: var(--spacing-md); font-size: var(--size-sm); color: var(--color-text-secondary); }
.legend__item { display: flex; align-items: center; gap: var(--spacing-xs); }
.legend__swatch { width: 12px; height: 12px; border-radius: 2px; flex-shrink: 0; }

/* ---------- Tag ---------- */
.tag { display: inline-flex; align-items: center; padding: 2px var(--spacing-sm); border-radius: var(--radius-sm); font-size: var(--size-xs); font-weight: var(--weight-bold); letter-spacing: 0.02em; text-transform: uppercase; }
.tag--orange { background: var(--color-secondary); color: #fff; }
.tag--gold { background: var(--color-accent); color: #1A1410; }
.tag--blue { background: var(--color-primary); color: var(--color-text-primary); }

/* ---------- Section Highlight ---------- */
.section-highlight { transition: opacity var(--transition-slow), transform var(--transition-slow); }
.section-highlight.active { opacity: 1; }

/* ---------- Breadcrumb ---------- */
.breadcrumb { display: flex; align-items: center; gap: var(--spacing-xs); flex-wrap: wrap; font-size: var(--size-sm); color: var(--color-text-secondary); padding: var(--spacing-md) 0; }
.breadcrumb__link { color: var(--color-text-secondary); transition: color var(--transition-fast); }
.breadcrumb__link:hover { color: var(--color-accent); }
.breadcrumb__current { color: var(--color-text-primary); font-weight: var(--weight-bold); }

/* ---------- Common Container ---------- */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--spacing-xl); }
@media (max-width: 768px) {
  .container { padding: 0 var(--spacing-md); }
}

/* ---------- Main Content ---------- */
#main-content { min-height: calc(100vh - var(--header-height) - 280px); padding-top: calc(var(--header-height) + var(--spacing-2xl)); }

/* ---------- Utility ---------- */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

/* ---------- Responsive Images Base ---------- */
.img-responsive { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
.img-container { position: relative; overflow: hidden; border-radius: var(--radius-md); background: var(--color-bg-light); }
.img-container img { width: 100%; height: 100%; object-fit: cover; }
.img-container--16x9 { aspect-ratio: 16 / 9; }
.img-container--4x3 { aspect-ratio: 4 / 3; }
.img-container--1x1 { aspect-ratio: 1 / 1; }

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--color-bg-dark); }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-primary); }