/* ==========================================================================
   必一BSPORTS —— 全站共享样式 / assets/site.css
   夜场竞技场 · 非对称编辑部 · 切角面板 · 双层导航
   ========================================================================== */

/* ---------- 1. Design Tokens ---------- */
:root {
  --primary: #0A1F44;
  --primary-light: #16336B;
  --primary-dark: #051021;
  --accent-green: #39FF14;
  --accent-orange: #FF6A00;
  --text-main: #E8ECF2;
  --text-muted: #9BA8BC;
  --line: #2A3B5C;
  --bg-light: #F2F4F8;

  --font-headline: 'Oswald', 'Noto Sans SC', 'Impact', 'Arial Narrow', sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'Roboto Mono', 'SF Mono', 'Cascadia Code', Consolas, 'Courier New', monospace;

  --container-w: 1280px;
  --cut: 14px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

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

body {
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.65;
  background:
    radial-gradient(ellipse 55% 45% at 88% 0%, rgba(57, 255, 20, 0.07), transparent 60%),
    radial-gradient(ellipse 40% 30% at 8% 15%, rgba(255, 106, 0, 0.05), transparent 55%),
    var(--primary);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

#main-content {
  flex: 1;
  width: 100%;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-headline);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-main);
}

p {
  margin-bottom: 1em;
}

a {
  color: var(--accent-green);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--accent-orange);
}

ul {
  list-style: none;
}

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

/* ---------- 3. Utilities ---------- */
.container {
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: 24px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.divider {
  display: block;
  height: 2px;
  background: var(--line);
  border: none;
  position: relative;
}

.divider::after {
  content: '';
  position: absolute;
  top: -4px;
  right: 0;
  width: 10px;
  height: 10px;
  background: var(--accent-green);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}

/* ---------- 4. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  line-height: 1.2;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--primary-dark);
  background: var(--accent-green);
  border: none;
  cursor: pointer;
  position: relative;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: filter 0.2s ease, transform 0.2s ease, background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  filter: brightness(1.12);
  transform: translateY(-2px);
  color: var(--primary-dark);
}

.btn:active {
  transform: translateY(0);
}

.btn--green {
  background: var(--accent-green);
  color: var(--primary-dark);
}

.btn--orange {
  background: var(--accent-orange);
  color: var(--primary-dark);
}

.btn--ghost {
  background: transparent;
  color: var(--text-main);
  border: 1px solid var(--line);
  clip-path: none;
}

.btn--ghost:hover {
  border-color: var(--accent-green);
  color: var(--accent-green);
  filter: none;
}

/* ---------- 5. Skip Link ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 2000;
  padding: 10px 20px;
  background: var(--accent-green);
  color: var(--primary-dark);
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transform: translateY(-220%);
  transition: transform 0.25s var(--ease);
}

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

/* ---------- 6. Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background:
    repeating-linear-gradient(135deg, transparent 0 22px, rgba(57, 255, 20, 0.025) 22px 23px),
    var(--primary);
  border-bottom: 1px solid var(--line);
}

.site-header::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 100%;
  background: linear-gradient(90deg, var(--accent-green) 0%, var(--accent-green) 24%, var(--line) 50%, transparent 100%);
  opacity: 0.55;
  pointer-events: none;
}

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  z-index: 5;
  background: linear-gradient(90deg, var(--accent-green), var(--accent-orange));
  pointer-events: none;
}

/* ---- Header Top ---- */
.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  max-width: var(--container-w);
  margin-inline: auto;
  padding: 6px 24px;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  background: var(--primary-dark);
  border-bottom: 1px solid var(--line);
}

.header-top__notice {
  margin: 0;
}

.header-top__icp {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  padding-left: 16px;
  border-left: 1px solid var(--line);
}

/* ---- Header Main ---- */
.header-main {
  display: flex;
  align-items: center;
  gap: 32px;
  padding-block: 14px;
  position: relative;
}

/* ---- Brand ---- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
  flex-shrink: 0;
}

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

.brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  height: 42px;
  padding: 4px 10px;
  background: var(--accent-green);
  color: var(--primary-dark);
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 1.05rem;
  line-height: 1;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand__name {
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 1.12rem;
  letter-spacing: 0.14em;
  color: var(--text-main);
}

.brand__sub {
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--text-muted);
}

/* ---- Main Nav (Desktop) ---- */
.main-nav {
  margin-left: auto;
}

.main-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.main-nav__link {
  display: inline-block;
  padding: 8px 10px;
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: 0.88rem;
  letter-spacing: 0.08em;
  color: var(--text-main);
  text-decoration: none;
  position: relative;
  transition: color 0.2s ease;
}

.main-nav__link::after {
  content: '';
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 2px;
  height: 2px;
  background: var(--accent-green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s var(--ease);
}

.main-nav__link:hover {
  color: var(--accent-green);
}

.main-nav__link:hover::after {
  transform: scaleX(1);
}

.main-nav__link[aria-current="page"] {
  color: var(--accent-green);
}

.main-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--accent-green);
}

/* ---- Header Actions ---- */
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.header-cta::after {
  content: '';
  width: 6px;
  height: 6px;
  border-top: 2px solid currentColor;
  border-right: 2px solid currentColor;
  transform: rotate(45deg);
  margin-left: 4px;
  flex-shrink: 0;
}

/* ---- Nav Toggle (Mobile) ---- */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: var(--primary-light);
  border: 1px solid var(--line);
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  align-items: center;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.nav-toggle:hover {
  border-color: var(--accent-green);
  background: var(--primary);
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-main);
  transition: transform 0.3s var(--ease), opacity 0.3s ease;
}

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

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

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

/* ---------- 7. Footer ---------- */
.site-footer {
  background:
    radial-gradient(ellipse 60% 80% at 100% 0%, rgba(57, 255, 20, 0.05), transparent 60%),
    var(--primary-dark);
  color: var(--text-muted);
  margin-top: auto;
}

.site-footer::before {
  content: '';
  display: block;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-green) 0%, var(--accent-green) 140px, var(--line) 320px, transparent 100%);
}

.footer-main {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 48px;
  padding: 56px 24px 40px;
  max-width: var(--container-w);
  margin-inline: auto;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-start;
}

.footer-slogan {
  font-family: var(--font-headline);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
  max-width: 34ch;
  margin: 0;
}

.footer-trust {
  font-size: 0.8rem;
  line-height: 1.7;
  max-width: 44ch;
  color: var(--text-muted);
  margin: 0;
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding-top: 8px;
}

.footer-nav__title {
  font-family: var(--font-headline);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-main);
  margin: 0 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  position: relative;
}

.footer-nav__title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 24px;
  height: 2px;
  background: var(--accent-green);
}

.footer-nav__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-nav__link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.86rem;
  display: inline-block;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-nav__link:hover {
  color: var(--accent-green);
  padding-left: 4px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 24px;
  padding-block: 20px 24px;
  border-top: 1px solid var(--line);
  font-size: 0.78rem;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: 24px;
}

.footer-contact {
  margin: 0;
  color: var(--text-muted);
}

.footer-meta {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.footer-icp {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.footer-copyright {
  color: var(--text-muted);
}

/* ---------- 8. Shared Components ---------- */
.section-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
}

.section-head__num {
  font-family: var(--font-headline);
  font-size: clamp(3rem, 6vw, 4.2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--accent-green);
  opacity: 0.4;
  letter-spacing: 0.02em;
}

.section-head__title {
  font-family: var(--font-headline);
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.04em;
  border-left: 3px solid var(--accent-orange);
  padding-left: 14px;
  margin: 0;
}

.panel-cut {
  background: linear-gradient(135deg, rgba(22, 51, 107, 0.92), rgba(5, 16, 33, 0.92));
  border: 1px solid var(--line);
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
  padding: 24px;
}

.tag {
  display: inline-block;
  padding: 4px 10px;
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-main);
  background: var(--primary-light);
  border-left: 3px solid var(--accent-green);
}

.tag--orange {
  border-left-color: var(--accent-orange);
  color: var(--accent-orange);
}

.data-value {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--accent-green);
  font-variant-numeric: tabular-nums;
}

/* ---------- 9. Scroll Reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.6s ease var(--reveal-delay, 0ms),
    transform 0.6s ease var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 10. Focus Visible ---------- */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent-orange);
  outline-offset: 3px;
}

/* ---------- 11. Responsive ---------- */
@media (max-width: 1080px) {
  .header-main {
    gap: 16px;
  }

  .main-nav__link {
    font-size: 0.8rem;
    padding: 8px 7px;
  }

  .header-cta {
    padding-inline: 16px;
    font-size: 0.74rem;
  }
}

@media (max-width: 920px) {
  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--primary);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    margin-left: 0;
    display: none;
    max-height: 70vh;
    overflow-y: auto;
  }

  .main-nav[data-open] {
    display: block;
    animation: nav-drop 0.25s var(--ease);
  }

  .main-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 24px 16px;
  }

  .main-nav__item {
    width: 100%;
  }

  .main-nav__link {
    display: block;
    padding: 14px 0;
    font-size: 1rem;
    border-bottom: 1px solid var(--line);
  }

  .main-nav__link::after {
    left: 0;
    right: auto;
    bottom: -1px;
    width: 32px;
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: 36px;
    padding-top: 44px;
  }

  .footer-columns {
    padding-top: 0;
  }
}

@media (max-width: 640px) {
  .header-top {
    display: none;
  }

  .header-main {
    padding-block: 10px;
  }

  .brand__sub {
    display: none;
  }

  .brand__name {
    font-size: 0.98rem;
  }

  .brand__mark {
    min-width: 36px;
    height: 36px;
    font-size: 0.92rem;
  }

  .header-cta {
    padding-inline: 12px;
    font-size: 0.68rem;
  }

  .header-cta::after {
    width: 5px;
    height: 5px;
    margin-left: 2px;
  }

  .container,
  .footer-main,
  .footer-bottom {
    padding-inline: 16px;
  }

  .footer-columns {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- 12. Keyframes & Reduced Motion ---------- */
@keyframes nav-drop {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@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;
    transition: none;
  }

  .main-nav[data-open] {
    animation: none;
  }
}