/* ============ BALLBET 贝博体育看台 共享样式 /assets/site.css ============ */

/* 1. Design Tokens */
:root {
  --c-bg: #0D1B2A;
  --c-bg-2: #1B263B;
  --c-paper: #F4E9D8;
  --c-blue: #00B4D8;
  --c-green: #C6FF00;
  --c-gold: #FCA311;
  --c-text: #FFFFFF;
  --c-text-2: #B0B3B8;
  --c-data: #7CEA9C;

  --rgb-bg: 13, 27, 42;
  --rgb-bg2: 27, 38, 59;
  --rgb-paper: 244, 233, 216;
  --rgb-blue: 0, 180, 216;
  --rgb-green: 198, 255, 0;
  --rgb-gold: 252, 163, 17;
  --rgb-text: 255, 255, 255;

  --font-sans: 'Noto Sans SC', 'Microsoft YaHei', 'PingFang SC', sans-serif;
  --font-head: 'Noto Sans SC', 'Inter', 'System UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', 'Consolas', monospace;

  --text-display: clamp(2.5rem, 8vw, 5rem);
  --text-h1: clamp(2rem, 5vw, 3.5rem);
  --text-h2: clamp(1.5rem, 3vw, 2.5rem);
  --text-h3: clamp(1.1rem, 1.8vw, 1.4rem);
  --text-body: clamp(0.875rem, 1vw, 1rem);
  --text-caption: 0.75rem;

  --container: 1200px;
  --header-h: 84px;
  --radius-xl: 24px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 64px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: .35s;
}

/* 2. Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  font-size: var(--text-body);
  line-height: 1.7;
  background: var(--c-bg);
  color: var(--c-text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

main {
  display: block;
}

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

ul, ol {
  list-style: none;
}

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

a:hover {
  color: var(--c-green);
}

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

:focus-visible {
  outline: 3px solid var(--c-green);
  outline-offset: 2px;
}

/* 3. 工具类 */
.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;
}

.container {
  width: min(var(--container), calc(100% - 48px));
  margin-inline: auto;
}

.section {
  padding-block: var(--space-xl);
}

.section--tight {
  padding-block: var(--space-md);
}

.divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, rgba(var(--rgb-blue), .4), transparent);
}

.rot-annotation {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: .3em;
  color: var(--c-text-2);
  text-transform: uppercase;
}

/* 4. 排版 */
h1, h2, h3, h4 {
  font-family: var(--font-head);
}

.page-title {
  font-family: var(--font-head);
  font-size: var(--text-h1);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: var(--space-sm) 0 var(--space-md);
}

.section-title {
  font-family: var(--font-head);
  font-size: var(--text-h2);
  font-weight: 800;
  line-height: 1.2;
  margin: var(--space-sm) 0;
}

.lead {
  font-size: clamp(1rem, 1.6vw, 1.25rem);
  line-height: 1.75;
  color: var(--c-text-2);
  max-width: 660px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-green);
}

.eyebrow::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--c-blue);
  border-radius: 2px;
}

/* 5. 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--c-text);
  border: 1px solid transparent;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

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

.btn--primary {
  background: var(--c-blue);
  color: var(--c-bg);
}

.btn--primary:hover {
  background: #00cbe8;
  color: var(--c-bg);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(var(--rgb-blue), .35);
}

.btn--accent {
  background: var(--c-green);
  color: var(--c-bg);
}

.btn--accent:hover {
  background: #d6ff33;
  color: var(--c-bg);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(var(--rgb-green), .25);
}

.btn--ghost {
  border-color: rgba(var(--rgb-blue), .5);
  color: var(--c-blue);
  background: transparent;
}

.btn--ghost:hover {
  background: rgba(var(--rgb-blue), .1);
  color: var(--c-blue);
}

/* 6. 基础组件 */
.card {
  background: var(--c-bg-2);
  border: 1px solid rgba(var(--rgb-text), .07);
  border-radius: var(--radius-xl);
  padding: var(--space-md);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(var(--rgb-blue), .45);
  box-shadow: 0 14px 32px rgba(0, 0, 0, .35);
}

.panel-paper {
  background: var(--c-paper);
  color: var(--c-bg);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
}

.panel-paper .lead,
.panel-paper .section-title {
  color: var(--c-bg);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(var(--rgb-blue), .12);
  border: 1px solid rgba(var(--rgb-blue), .3);
  color: var(--c-blue);
}

.tag--green {
  background: rgba(var(--rgb-green), .12);
  border-color: rgba(var(--rgb-green), .3);
  color: var(--c-green);
}

.tag--gold {
  background: rgba(var(--rgb-gold), .12);
  border-color: rgba(var(--rgb-gold), .3);
  color: var(--c-gold);
}

.stat {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 700;
  color: var(--c-green);
  line-height: 1;
}

.stat__label {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--c-text-2);
  letter-spacing: .08em;
  margin-top: 6px;
}

.stat-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md) var(--space-lg);
}

.media-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  background: var(--c-bg-2);
  aspect-ratio: 16 / 9;
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(var(--rgb-blue), .28);
  border-radius: var(--radius-xl);
  pointer-events: none;
}

.media-frame--tall {
  aspect-ratio: 4 / 5;
}

.media-frame--wide {
  aspect-ratio: 21 / 9;
}

/* 7. Bento 栅格 */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-md);
}

.col-4 { grid-column: span 4; }
.col-6 { grid-column: span 6; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }

/* 8. 面包屑 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: var(--space-sm) 0;
  font-size: 0.8125rem;
  color: var(--c-text-2);
}

.breadcrumb a {
  color: var(--c-blue);
}

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

.breadcrumb__sep {
  color: rgba(var(--rgb-text), .35);
}

.breadcrumb [aria-current="page"] {
  color: var(--c-green);
  font-weight: 600;
}

/* 9. 头部框架 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(var(--rgb-bg), .96);
  border-bottom: 1px solid rgba(var(--rgb-blue), .2);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.skip-link {
  position: absolute;
  top: var(--space-sm);
  left: var(--space-sm);
  z-index: 300;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  background: var(--c-green);
  color: var(--c-bg);
  font-weight: 700;
  font-size: 0.875rem;
  transform: translateY(-200%);
  transition: transform .25s var(--ease);
}

.skip-link:focus-visible {
  outline: none;
  transform: translateY(0);
}

.header-frame {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  min-height: var(--header-h);
  flex-wrap: nowrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  color: var(--c-text);
}

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

.brand-mark {
  display: inline-flex;
  align-items: flex-end;
  gap: 3px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: 13px;
  background: linear-gradient(135deg, var(--c-blue), var(--c-bg-2));
  box-shadow: inset 0 0 0 1px rgba(var(--rgb-blue), .45);
  flex-shrink: 0;
}

.brand-mark__bar {
  width: 4px;
  border-radius: 2px;
  background: var(--c-green);
}

.brand-mark__bar:nth-child(1) { height: 38%; }
.brand-mark__bar:nth-child(2) { height: 68%; }
.brand-mark__bar:nth-child(3) { height: 100%; }

.brand-name {
  display: flex;
  flex-direction: column;
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: .02em;
}

.brand-name__cn {
  font-style: normal;
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: .32em;
  color: var(--c-green);
  margin-top: 3px;
}

.header-live {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  background: rgba(var(--rgb-green), .08);
  border: 1px solid rgba(var(--rgb-green), .25);
  color: var(--c-green);
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}

.header-live__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-green);
  animation: live-pulse 1.8s ease-in-out infinite;
}

@keyframes live-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(var(--rgb-green), .5); }
  50% { box-shadow: 0 0 0 5px rgba(var(--rgb-green), 0); }
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
  padding: 6px;
  background: var(--c-bg-2);
  border: 1px solid rgba(var(--rgb-blue), .18);
  border-radius: var(--radius-pill);
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  color: var(--c-text-2);
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
  position: relative;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.nav-link::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  border: 1px solid var(--c-blue);
  background: transparent;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.nav-link:hover {
  color: var(--c-text);
  background: rgba(var(--rgb-blue), .14);
}

.nav-link:hover::before {
  background: var(--c-blue);
  border-color: var(--c-blue);
}

.nav-link[aria-current="page"] {
  color: var(--c-bg);
  background: var(--c-green);
  font-weight: 700;
}

.nav-link[aria-current="page"]::before {
  background: var(--c-bg);
  border-color: var(--c-bg);
  box-shadow: 0 0 8px rgba(var(--rgb-green), .6);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border-radius: 13px;
  border: 1px solid rgba(var(--rgb-blue), .3);
  background: var(--c-bg-2);
  flex-shrink: 0;
}

.nav-toggle__line {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--c-text);
  transition: transform var(--dur) var(--ease), opacity .2s ease;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 300;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--c-blue), var(--c-green), var(--c-gold));
  pointer-events: none;
}

/* 10. 响应式 - 头部与导航 */
@media (max-width: 1100px) {
  .header-live {
    display: none;
  }

  .nav-link {
    padding: 8px 12px;
    font-size: 0.8125rem;
  }
}

@media (max-width: 959px) {
  :root {
    --header-h: 72px;
  }

  .header-frame {
    min-height: var(--header-h);
  }

  .brand-mark {
    width: 36px;
    height: 36px;
    padding: 7px;
  }

  .brand-name {
    font-size: 1.0625rem;
  }

  .brand-name__cn {
    font-size: 0.5625rem;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .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);
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    margin-left: 0;
    padding: 12px;
    background: var(--c-bg-2);
    border: 1px solid rgba(var(--rgb-blue), .3);
    border-radius: var(--radius-md);
    box-shadow: 0 20px 48px rgba(0, 0, 0, .45);
  }

  .site-nav[data-open] {
    display: flex;
  }

  .nav-link {
    justify-content: flex-start;
    width: 100%;
    padding: 13px 16px;
    font-size: 0.9375rem;
    border-radius: 13px;
    color: var(--c-text);
  }

  .nav-link[aria-current="page"] {
    background: var(--c-green);
    color: var(--c-bg);
  }
}

/* 11. 页脚 */
.site-footer {
  position: relative;
  background: linear-gradient(180deg, var(--c-bg) 0%, #081421 100%);
  border-top: 1px solid rgba(var(--rgb-blue), .18);
  padding-block: var(--space-lg) var(--space-sm);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-blue), var(--c-green), var(--c-gold));
  opacity: .9;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-lg) var(--space-md);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(var(--rgb-text), .08);
}

.footer-brand {
  grid-column: span 4;
}

.footer-col {
  grid-column: span 3;
}

.footer-col--legal {
  grid-column: span 2;
}

.footer-contact {
  grid-column: span 3;
}

.footer-desc {
  margin-top: var(--space-sm);
  color: var(--c-text-2);
  font-size: 0.875rem;
  line-height: 1.8;
  max-width: 300px;
}

.footer-note {
  margin-top: var(--space-md);
  padding: var(--space-sm);
  background: rgba(var(--rgb-blue), .07);
  border-left: 2px solid var(--c-blue);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 0.75rem;
  color: var(--c-text-2);
  line-height: 1.7;
}

.footer-heading {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-green);
}

.footer-heading::before {
  content: "//";
  color: var(--c-blue);
  letter-spacing: 0;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col .footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 16px;
  row-gap: 10px;
}

.footer-col--legal .footer-links {
  grid-template-columns: minmax(0, 1fr);
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--c-text-2);
  font-size: 0.875rem;
}

.footer-links a::before {
  content: "›";
  color: var(--c-gold);
  font-family: var(--font-mono);
}

.footer-links a:hover {
  color: var(--c-blue);
}

.footer-contact p {
  display: flex;
  gap: 10px;
  margin: 0 0 10px;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--c-text-2);
}

.footer-contact p::before {
  content: "→";
  flex-shrink: 0;
  font-family: var(--font-mono);
  color: var(--c-gold);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding-top: var(--space-sm);
  font-size: 0.75rem;
  color: var(--c-text-2);
}

.data-note {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: .05em;
}

.back-to-top {
  position: fixed;
  right: var(--space-sm);
  bottom: var(--space-sm);
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--c-blue);
  color: var(--c-bg);
  font-size: 1.25rem;
  box-shadow: 0 10px 28px rgba(var(--rgb-blue), .3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), background-color var(--dur) var(--ease), visibility var(--dur) var(--ease);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--c-green);
}

/* 页脚响应式 */
@media (max-width: 899px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-brand {
    grid-column: span 2;
  }

  .footer-col,
  .footer-col--legal {
    grid-column: span 1;
  }

  .footer-contact {
    grid-column: span 2;
  }
}

@media (max-width: 599px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-brand,
  .footer-col,
  .footer-col--legal,
  .footer-contact {
    grid-column: span 1;
  }

  .footer-col .footer-links {
    grid-template-columns: 1fr;
  }
}

/* 12. 显现与动效降级 */
[data-reveal] {
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

[data-reveal]:not([data-reveal="done"]) {
  opacity: 0;
  transform: translateY(24px);
}

[data-reveal="done"] {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .header-live__dot {
    animation: none;
  }
}

/* 13. 框架式装饰边线 */
@media (min-width: 1200px) {
  body::before,
  body::after {
    content: "";
    position: fixed;
    top: 0;
    bottom: 0;
    z-index: 120;
    width: 3px;
    pointer-events: none;
    opacity: .55;
  }

  body::before {
    left: 0;
    background: linear-gradient(180deg, var(--c-blue), transparent 60%);
  }

  body::after {
    right: 0;
    background: linear-gradient(180deg, var(--c-gold), transparent 60%);
  }
}