/* =========================================================
   必赢竞技 Site Kit — express-bwin.com.cn
   共享样式：框架导航 / Bento 信息板 / 数据终端视觉语言
   ========================================================= */

/* ---------- 01. Design Tokens ---------- */
:root {
  --c-primary: #0B3D2E;
  --c-deep: #051F17;
  --c-panel: #0F4C3A;
  --c-hover: #1B6B52;
  --c-outline: #2E7D63;
  --c-mist: #9ED4C2;
  --c-accent: #D4FF00;
  --c-white: #F2FFF7;
  --c-data: #127A5B;
  --c-alert: #FF6B4A;
  --font-heading: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Roboto Mono", "JetBrains Mono", "Liberation Mono", "Courier New", monospace;
  --rail-width: 280px;
  --container: 1200px;
  --board-gap: 1.5rem;
  --pad-section: 4rem 1.5rem;
  --border-thick: 3px;
  --border-thin: 1px;
  --shadow-card: 6px 6px 0 rgba(0, 0, 0, 0.3);
}

/* ---------- 02. Reset & Base ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  background: var(--c-deep);
}
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-white);
  background: var(--c-deep);
  display: grid;
  grid-template-columns: var(--rail-width) 1fr;
  grid-template-rows: 1fr auto;
  min-height: 100vh;
}
main {
  display: block;
}
#main-content {
  display: block;
}
img, video, svg {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: var(--c-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
a:hover {
  color: var(--c-white);
}
ul, ol {
  list-style-position: inside;
}
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 800;
  line-height: 1.2;
  text-wrap: balance;
}
p {
  text-wrap: pretty;
}
:focus-visible {
  outline: 3px solid var(--c-accent);
  outline-offset: 2px;
}

/* ---------- 03. Layout Shell ---------- */
.site-header {
  grid-column: 1;
  grid-row: 1 / -1;
  position: sticky;
  top: 0;
  height: 100vh;
  align-self: start;
  background: var(--c-primary);
  border-right: var(--border-thick) solid var(--c-outline);
  display: flex;
  flex-direction: column;
  z-index: 1000;
}
.site-main {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
  background: var(--c-deep);
}
.site-footer {
  grid-column: 2;
  grid-row: 2;
  min-width: 0;
  background: var(--c-primary);
  border-top: var(--border-thick) solid var(--c-outline);
}

/* ---------- 04. Skip Link ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: calc(var(--rail-width) + 12px);
  z-index: 3000;
  background: var(--c-accent);
  color: var(--c-deep);
  font-family: var(--font-heading);
  font-weight: 700;
  padding: 8px 16px;
  text-decoration: none;
  border-radius: 2px;
  transform: translateY(-200%);
  transition: transform 0.2s ease;
}
.skip-link:focus {
  transform: translateY(0);
}

/* ---------- 05. Scroll Progress ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: var(--rail-width);
  width: 0;
  height: 4px;
  background: var(--c-accent);
  z-index: 2000;
  pointer-events: none;
}

/* ---------- 06. Site Header ---------- */
.site-header__stripe {
  height: 6px;
  background: var(--c-accent);
  flex: 0 0 6px;
}
.site-header__inner {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  padding: var(--board-gap) var(--board-gap) 0;
  min-height: 0;
}
.site-header__foot {
  margin-top: auto;
  padding: 1rem var(--board-gap);
  border-top: 1px solid var(--c-outline);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.site-header__live {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--c-mist);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ---------- 07. Brand ---------- */
.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--c-white);
}
.brand:hover {
  color: var(--c-white);
}
.brand__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--c-accent);
  color: var(--c-deep);
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 20px;
  line-height: 1;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  flex-shrink: 0;
}
.brand__icon--footer {
  width: 40px;
  height: 40px;
  font-size: 18px;
}
.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  min-width: 0;
}
.brand__name {
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.brand__sub {
  font-size: 0.68rem;
  color: var(--c-mist);
  letter-spacing: 0.06em;
  white-space: nowrap;
}

/* ---------- 08. Navigation ---------- */
.site-nav {
  margin-top: var(--board-gap);
}
.site-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-nav__item + .site-nav__item {
  margin-top: 2px;
}
.site-nav__link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 9px 12px;
  color: var(--c-white);
  text-decoration: none;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.92rem;
  border: 2px solid transparent;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}
.site-nav__link:hover {
  background: var(--c-hover);
  border-color: var(--c-outline);
  transform: translateX(4px);
  color: var(--c-white);
}
.site-nav__link[aria-current="page"] {
  background: rgba(212, 255, 0, 0.08);
  border-color: var(--c-accent);
  color: var(--c-accent);
  font-weight: 700;
}
.site-nav__num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--c-mist);
  flex-shrink: 0;
}
.site-nav__link[aria-current="page"] .site-nav__num {
  color: var(--c-accent);
}
.site-nav__name {
  white-space: nowrap;
}

/* ---------- 09. Nav Toggle ---------- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  background: none;
  border: 1px solid var(--c-outline);
  border-radius: 2px;
  padding: 7px 10px;
  cursor: pointer;
  margin-left: auto;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.nav-toggle:hover {
  border-color: var(--c-accent);
}
.nav-toggle[aria-expanded="true"] {
  border-color: var(--c-accent);
  background: rgba(212, 255, 0, 0.06);
}
.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--c-accent);
  margin: 3px 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav-toggle__label {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--c-accent);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar--1 {
  transform: translateY(5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar--2 {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar--3 {
  transform: translateY(-5px) rotate(-45deg);
}

/* ---------- 10. Live Pulse ---------- */
.live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-accent);
  flex-shrink: 0;
  animation: live-pulse 1.6s ease-in-out infinite;
}
@keyframes live-pulse {
  0%, 100% {
    opacity: 1;
    box-shadow: 0 0 0 0 rgba(212, 255, 0, 0.5);
  }
  50% {
    opacity: 0.65;
    box-shadow: 0 0 0 6px rgba(212, 255, 0, 0);
  }
}

/* ---------- 11. Footer ---------- */
.site-footer__grid {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--pad-section);
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--board-gap);
}
.site-footer__brand {
  display: flex;
  flex-direction: column;
}
.site-footer__logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}
.site-footer__logotext {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.site-footer__brandname {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 900;
  color: var(--c-white);
}
.site-footer__brandsub {
  font-size: 0.68rem;
  color: var(--c-mist);
  letter-spacing: 0.06em;
}
.site-footer__slogan {
  font-family: var(--font-heading);
  font-style: italic;
  font-weight: 800;
  font-size: 1.4rem;
  color: var(--c-accent);
  margin: 0.75rem 0 0.5rem;
}
.site-footer__trust {
  font-size: 0.82rem;
  color: var(--c-mist);
  max-width: 32ch;
  margin-bottom: 1.5rem;
}
.site-footer__heading {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-accent);
  margin-bottom: 0.75rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--c-outline);
}
.site-footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-footer__list li + li {
  margin-top: 0.35rem;
}
.site-footer__list a {
  color: var(--c-mist);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.site-footer__list a:hover {
  color: var(--c-accent);
  padding-left: 4px;
}
.site-footer__contactlist {
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-footer__contactitem {
  display: flex;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--c-white);
  margin-bottom: 0.5rem;
}
.site-footer__contactlabel {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--c-mist);
  text-transform: uppercase;
  min-width: 32px;
  flex-shrink: 0;
  padding-top: 2px;
}
.site-footer__bottom {
  border-top: 1px solid var(--c-outline);
  padding: 0.75rem var(--board-gap);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--c-mist);
}
.site-footer__copyright,
.site-footer__icp {
  margin: 0;
}

/* ---------- 12. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  border: 2px solid var(--c-accent);
  background: transparent;
  color: var(--c-accent);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
}
.btn:hover {
  background: var(--c-accent);
  color: var(--c-deep);
  transform: translateY(-2px);
  box-shadow: 4px 4px 0 var(--c-outline);
}
.btn:active {
  transform: translateY(0);
  box-shadow: 2px 2px 0 var(--c-outline);
}
.btn--solid {
  background: var(--c-accent);
  color: var(--c-deep);
  border-color: var(--c-accent);
}
.btn--solid:hover {
  background: var(--c-white);
  border-color: var(--c-white);
  color: var(--c-deep);
}
.btn--ghost {
  border-color: var(--c-outline);
  color: var(--c-white);
}
.btn--ghost:hover {
  border-color: var(--c-white);
  background: transparent;
  color: var(--c-accent);
  box-shadow: 4px 4px 0 rgba(46, 125, 99, 0.5);
}

/* ---------- 13. Content Components ---------- */
.content-wrap {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--board-gap);
}
.page-section {
  padding: var(--pad-section);
}
.section-head {
  display: flex;
  align-items: baseline;
  gap: var(--board-gap);
  margin-bottom: var(--board-gap);
  border-bottom: 2px solid var(--c-outline);
  padding-bottom: 0.6rem;
}
.section-head__index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--c-accent);
  flex-shrink: 0;
}
.section-head__title {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 800;
  font-style: italic;
  line-height: 1.2;
}
.section-head__sub {
  color: var(--c-mist);
  font-size: 0.85rem;
  margin-left: auto;
  text-align: right;
}
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--board-gap);
}
.bento-card {
  grid-column: span 12;
  background: var(--c-panel);
  border: 2px solid var(--c-outline);
  padding: var(--board-gap);
  position: relative;
  min-width: 0;
}
.bento-card--cut {
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}
.bento-card--col-8 { grid-column: span 8; }
.bento-card--col-6 { grid-column: span 6; }
.bento-card--col-4 { grid-column: span 4; }
.bento-card--col-3 { grid-column: span 3; }
.panel {
  background: var(--c-panel);
  border: 2px solid var(--c-outline);
  padding: var(--board-gap);
  position: relative;
}
.big-number {
  font-family: var(--font-mono);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1;
  color: var(--c-accent);
  font-variant-numeric: tabular-nums;
}
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  border: 1px solid var(--c-outline);
  border-radius: 2px;
  color: var(--c-mist);
  text-transform: uppercase;
  white-space: nowrap;
}
.tag--live {
  border-color: var(--c-accent);
  color: var(--c-accent);
}
.tag--alert {
  border-color: var(--c-alert);
  color: var(--c-alert);
}

/* ---------- 14. Breadcrumbs ---------- */
.breadcrumb {
  margin-bottom: var(--board-gap);
}
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  gap: 0.5rem;
  align-items: center;
}
.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--c-mist);
}
.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--c-outline);
  font-family: var(--font-mono);
}
.breadcrumb__link {
  color: var(--c-mist);
  text-decoration: none;
  transition: color 0.2s ease;
}
.breadcrumb__link:hover {
  color: var(--c-accent);
}
.breadcrumb__current {
  color: var(--c-white);
  font-weight: 600;
}

/* ---------- 15. Image Placeholder ---------- */
.image-placeholder {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--c-panel);
  border: 2px solid var(--c-outline);
  position: relative;
  overflow: hidden;
}
.image-placeholder--tall {
  aspect-ratio: 4 / 5;
}
.image-placeholder--wide {
  aspect-ratio: 21 / 9;
}
.image-placeholder::before {
  content: attr(data-caption);
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--c-mist);
  text-align: center;
  padding: 1rem;
  background: repeating-linear-gradient(
    -45deg,
    transparent 0 12px,
    rgba(46, 125, 99, 0.08) 12px 24px
  );
}

/* ---------- 16. Utility ---------- */
.speed-lines {
  background: repeating-linear-gradient(
    -45deg,
    transparent 0 10px,
    rgba(46, 125, 99, 0.18) 10px 20px
  );
  height: 8px;
  border: 0;
}
.text-accent {
  color: var(--c-accent);
}
.text-mist {
  color: var(--c-mist);
}
.text-mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}
.mt-1 { margin-top: var(--space-3); }
.mb-1 { margin-bottom: var(--space-3); }

/* ---------- 17. Responsive ---------- */
@media (max-width: 1023px) {
  body {
    display: block;
    min-height: 0;
  }
  .site-header {
    position: relative;
    top: auto;
    height: auto;
    width: 100%;
    border-right: 0;
    border-bottom: var(--border-thick) solid var(--c-outline);
    align-self: auto;
  }
  .site-header__inner {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    padding: 0.75rem 1rem;
  }
  .site-header__foot {
    margin-top: 0;
    padding: 0.6rem 1rem;
  }
  .skip-link {
    left: 12px;
  }
  .scroll-progress {
    left: 0;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .site-nav {
    flex-basis: 100%;
    margin-top: 0;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, opacity 0.25s ease, margin-top 0.25s ease;
  }
  .site-nav[data-open] {
    max-height: 80vh;
    opacity: 1;
    overflow-y: auto;
    margin-top: 0.75rem;
  }
  .site-nav__link:hover {
    transform: none;
  }
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }
  .site-footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 767px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: var(--board-gap);
  }
  .site-footer__brand {
    grid-column: auto;
  }
  .site-footer__bottom {
    flex-direction: column;
    gap: 0.25rem;
  }
  .bento-card--col-8,
  .bento-card--col-6,
  .bento-card--col-4,
  .bento-card--col-3 {
    grid-column: span 12;
  }
  .section-head {
    flex-wrap: wrap;
    gap: 0.25rem 1rem;
  }
  .section-head__sub {
    margin-left: 0;
    text-align: left;
    flex-basis: 100%;
  }
}

@media (max-width: 480px) {
  .brand__sub {
    white-space: normal;
    font-size: 0.62rem;
  }
  .nav-toggle__label {
    display: none;
  }
}

/* ---------- 18. Accessibility & Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .nav-toggle__bar {
    transition: none;
  }
}