:root {
  --bg-deep: #0A1F44;
  --bg-sea: #102A5E;
  --accent: #FF6B00;
  --accent-soft: #FF8C32;
  --silver: #C0C0C0;
  --silver-light: #E5E7EB;
  --white: #FFFFFF;
  --border-alpha: rgba(255, 255, 255, 0.1);
  --font-display: 'Impact', 'Arial Black', 'Noto Sans SC', sans-serif;
  --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-num: 'DIN Alternate', 'Roboto Mono', 'Consolas', monospace;
  --rail: 240px;
  --header-h: 72px;
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-pill: 999px;
  --shadow-accent: 0 10px 30px rgba(255, 107, 0, 0.28);
  --ease: cubic-bezier(0.22, 0.8, 0.24, 1);
}

*,
*::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: 1rem;
  line-height: 1.6;
  color: var(--silver-light);
  background-color: var(--bg-deep);
  background-image:
    radial-gradient(1200px 600px at 85% -10%, rgba(255, 107, 0, 0.10), transparent 60%),
    radial-gradient(900px 500px at -10% 30%, rgba(16, 42, 94, 0.7), transparent 65%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: linear-gradient(115deg, rgba(255, 255, 255, 0.022) 25%, transparent 25%);
  background-size: 56px 56px;
  pointer-events: none;
  z-index: 0;
}

::selection {
  background: var(--accent);
  color: var(--bg-deep);
}

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

a {
  color: inherit;
}

button {
  font-family: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

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

.site-main {
  position: relative;
  z-index: 1;
  min-height: 65vh;
  margin-left: 0;
}

.shell {
  padding-inline: clamp(20px, 4vw, 56px);
}

.section {
  padding-block: clamp(56px, 8vw, 110px);
  position: relative;
}

.eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent);
}

.display-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.4rem, 7vw, 5.2rem);
  line-height: 0.96;
  letter-spacing: -0.01em;
  color: var(--white);
  text-transform: uppercase;
}

.lead {
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  line-height: 1.75;
  color: var(--silver-light);
  max-width: 34em;
}

.section-number {
  font-family: var(--font-num);
  font-size: 0.9rem;
  color: var(--accent);
  letter-spacing: 0.1em;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 300;
  padding: 10px 18px;
  background: var(--accent);
  color: var(--bg-deep);
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  border-radius: var(--radius-pill);
  transition: top 0.2s var(--ease);
}

.skip-link:focus {
  top: 12px;
}

.site-header {
  position: fixed;
  inset: 0;
  z-index: 200;
  pointer-events: none;
}

.site-header > * {
  pointer-events: auto;
}

.header-track {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--rail);
  display: none;
  flex-direction: column;
  padding: 28px 20px 24px;
  background: linear-gradient(165deg, var(--bg-sea) 0%, var(--bg-deep) 78%);
  border-right: 1px solid var(--border-alpha);
  z-index: 2;
}

.header-track-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 28px;
  flex: 1;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  line-height: 1.2;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-soft));
  color: var(--bg-deep);
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1;
  box-shadow: 0 8px 24px rgba(255, 107, 0, 0.35);
}

.brand-name {
  font-weight: 800;
  font-size: 1.12rem;
  color: var(--white);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.brand-badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  background: rgba(255, 107, 0, 0.16);
  border: 1px solid rgba(255, 107, 0, 0.4);
  color: var(--accent-soft);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
}

.track-label {
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--silver);
  opacity: 0.65;
}

.header-track-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.track-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  color: var(--silver-light);
  text-decoration: none;
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  transition: background 0.25s, color 0.25s, transform 0.25s, border-color 0.25s;
}

.track-num {
  font-family: var(--font-num);
  font-size: 0.75rem;
  color: var(--accent);
  min-width: 22px;
  opacity: 0.9;
}

.track-link:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--white);
  transform: translateX(4px);
}

.track-link[aria-current="page"] {
  background: rgba(255, 107, 0, 0.12);
  border-color: rgba(255, 107, 0, 0.35);
  color: var(--white);
}

.track-foot {
  margin-top: auto;
  border-top: 1px dashed rgba(255, 255, 255, 0.14);
  padding-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--silver);
  font-size: 0.8rem;
}

.track-status {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--silver-light);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 rgba(255, 107, 0, 0.6);
  animation: status-pulse 2.2s infinite;
}

@keyframes status-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(255, 107, 0, 0.55);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(255, 107, 0, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(255, 107, 0, 0);
  }
}

.track-gradient {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 180px;
  background: radial-gradient(120% 100% at 50% 100%, rgba(255, 107, 0, 0.12), transparent 70%);
  pointer-events: none;
}

.header-bar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  display: flex;
  align-items: center;
  padding: 0 clamp(18px, 3vw, 40px);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
  z-index: 3;
}

.header-bar::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(255, 107, 0, 0.55), transparent);
  opacity: 0;
  transition: opacity 0.35s var(--ease);
}

.site-header.is-scrolled .header-bar {
  background: rgba(10, 31, 68, 0.92);
  border-bottom-color: var(--border-alpha);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(12px);
}

.site-header.is-scrolled .header-bar::after {
  opacity: 1;
}

.header-bar-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
}

.brand-bar {
  display: flex;
  margin-right: auto;
}

.bar-status {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.04);
  color: var(--silver);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.header-nav {
  display: none;
  gap: 4px;
  margin-left: auto;
}

.header-nav a {
  position: relative;
  display: inline-block;
  padding: 10px 14px;
  color: var(--silver-light);
  text-decoration: none;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  border-radius: var(--radius-pill);
  transition: color 0.2s, background 0.2s;
}

.header-nav a:hover {
  color: var(--white);
  background: rgba(255, 255, 255, 0.06);
}

.header-nav a[aria-current="page"] {
  color: var(--white);
  background: rgba(255, 107, 0, 0.14);
  box-shadow: inset 0 0 0 1px rgba(255, 107, 0, 0.35);
}

.header-cta {
  display: none;
  align-items: center;
  padding: 11px 18px;
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: var(--bg-deep);
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  box-shadow: var(--shadow-accent);
  transition: background 0.2s var(--ease), transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.header-cta:hover {
  background: var(--accent-soft);
  transform: translateY(-2px);
  box-shadow: 0 14px 36px rgba(255, 107, 0, 0.4);
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.04);
}

.nav-toggle-line {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--white);
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.site-header[data-open] .nav-toggle-line:nth-child(2) {
  opacity: 0;
  transform: translateX(-6px);
}

.site-header[data-open] .nav-toggle-line:first-child {
  transform: translateY(8px) rotate(45deg);
}

.site-header[data-open] .nav-toggle-line:last-child {
  transform: translateY(-8px) rotate(-45deg);
}

.nav-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(88vw, 380px);
  z-index: 4;
  display: flex;
  flex-direction: column;
  padding: 28px 24px;
  overflow-y: auto;
  background: var(--bg-deep);
  border-left: 1px solid var(--border-alpha);
  box-shadow: -30px 0 70px rgba(0, 0, 0, 0.5);
  transform: translateX(104%);
  transition: transform 0.45s var(--ease);
}

.site-header[data-open] .nav-drawer {
  transform: none;
}

.nav-drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 28px;
}

.nav-drawer-headline {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--silver);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.nav-drawer-menu {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nav-drawer-menu a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  color: var(--silver-light);
  text-decoration: none;
  font-size: 1rem;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.nav-drawer-menu a:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--white);
}

.nav-drawer-menu a[aria-current="page"] {
  background: rgba(255, 107, 0, 0.12);
  border-color: rgba(255, 107, 0, 0.35);
  color: var(--white);
}

.nav-drawer-contact {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px dashed rgba(255, 255, 255, 0.14);
  color: var(--silver);
  font-size: 0.85rem;
  line-height: 1.9;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-soft));
  transform: scaleX(0);
  transform-origin: left center;
  will-change: transform;
  pointer-events: none;
  z-index: 6;
}

.totop {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 46px;
  height: 46px;
  border-radius: 16px;
  border: 1px solid rgba(255, 107, 0, 0.4);
  background: rgba(10, 31, 68, 0.9);
  color: var(--white);
  font-size: 1.1rem;
  z-index: 210;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
  transition: opacity 0.3s, transform 0.3s, visibility 0.3s, background 0.2s;
}

.totop.is-visible {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.totop:hover {
  background: var(--accent);
  color: var(--bg-deep);
}

.site-footer {
  position: relative;
  margin-left: 0;
  overflow: hidden;
  background: linear-gradient(180deg, var(--bg-deep) 0%, #070F26 100%);
  border-top: 1px solid var(--border-alpha);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 100%;
  background: linear-gradient(90deg, var(--accent), transparent 40%);
}

.site-footer::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(115deg, rgba(255, 255, 255, 0.016) 25%, transparent 25%);
  background-size: 44px 44px;
  pointer-events: none;
}

.footer-frame {
  position: relative;
  z-index: 1;
  padding: clamp(48px, 7vw, 84px) clamp(20px, 4vw, 56px) 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.footer-brand .brand {
  margin-bottom: 18px;
}

.footer-brief {
  color: var(--silver-light);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 16px;
  max-width: 560px;
}

.footer-trust {
  color: var(--silver);
  font-size: 0.82rem;
  line-height: 1.75;
  border-left: 2px solid rgba(255, 107, 0, 0.5);
  border-radius: 0 12px 12px 0;
  background: rgba(255, 255, 255, 0.02);
  padding: 12px 14px;
}

.footer-label {
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--silver);
  margin-bottom: 18px;
}

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

.footer-nav a {
  width: fit-content;
  color: var(--silver-light);
  text-decoration: none;
  font-size: 0.92rem;
  transition: color 0.2s, padding-left 0.2s;
}

.footer-nav a:hover {
  color: var(--accent);
}

.footer-nav a[aria-current="page"] {
  color: var(--accent);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-line {
  color: var(--silver-light);
  font-size: 0.92rem;
  line-height: 1.8;
}

.footer-note {
  margin-top: 10px;
  padding: 10px 12px;
  border: 1px dashed rgba(255, 255, 255, 0.14);
  border-radius: 12px;
  color: var(--silver);
  font-size: 0.82rem;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 48px;
  padding-top: 22px;
  border-top: 1px solid var(--border-alpha);
}

.footer-copy {
  color: var(--silver);
  font-size: 0.82rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
}

.footer-links a {
  color: var(--silver);
  text-decoration: none;
  font-size: 0.82rem;
  transition: color 0.2s;
}

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

.footer-icp {
  color: rgba(255, 255, 255, 0.4);
  font-size: 0.78rem;
  padding: 4px 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-pill);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 24px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  transition: background 0.25s var(--ease), color 0.25s, border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg-deep);
  box-shadow: var(--shadow-accent);
}

.btn-primary:hover {
  background: var(--accent-soft);
  transform: translateY(-2px);
  box-shadow: 0 14px 36px rgba(255, 107, 0, 0.4);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.03);
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent-soft);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 96px;
  color: var(--silver);
  font-size: 0.85rem;
}

.breadcrumbs a {
  color: var(--silver-light);
  text-decoration: none;
  transition: color 0.2s;
}

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

.breadcrumbs .crumb-sep {
  color: rgba(255, 255, 255, 0.3);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr));
  gap: clamp(18px, 2.4vw, 28px);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
  gap: clamp(16px, 2.4vw, 26px);
}

.card {
  position: relative;
  overflow: hidden;
  padding: 28px;
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(16, 42, 94, 0.5), rgba(16, 42, 94, 0.2));
  border: 1px solid var(--border-alpha);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), background 0.3s;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 24px;
  height: 3px;
  width: 64px;
  background: linear-gradient(90deg, var(--accent), transparent);
  border-radius: 0 0 4px 4px;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 107, 0, 0.35);
  background: linear-gradient(180deg, rgba(16, 42, 94, 0.7), rgba(16, 42, 94, 0.3));
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: rgba(255, 107, 0, 0.12);
  border: 1px solid rgba(255, 107, 0, 0.3);
  color: var(--accent-soft);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
}

.media-panel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-alpha);
  background: linear-gradient(135deg, var(--bg-sea) 0%, var(--bg-deep) 55%, #071225 100%);
  aspect-ratio: 3 / 2;
}

.media-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(115deg, rgba(255, 255, 255, 0.03) 25%, transparent 25%),
    linear-gradient(0deg, rgba(255, 107, 0, 0.05), transparent 50%);
  background-size: 36px 36px, 100% 100%;
  z-index: 1;
}

.media-panel::after {
  content: "B·SPORTS 2025";
  position: absolute;
  left: 16px;
  bottom: 16px;
  z-index: 2;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: rgba(255, 107, 0, 0.16);
  border: 1px solid rgba(255, 107, 0, 0.4);
  color: var(--accent-soft);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
}

.media-panel img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 3;
}

.media-panel.is-16x9 {
  aspect-ratio: 16 / 9;
}

.media-panel.is-portrait {
  aspect-ratio: 4 / 5;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s var(--ease);
  will-change: opacity, transform;
}

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

[data-count] {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

@media (min-width: 1024px) {
  .site-main {
    margin-left: var(--rail);
  }

  .site-footer {
    margin-left: var(--rail);
  }

  .header-track {
    display: flex;
  }

  .header-bar {
    left: var(--rail);
    right: 0;
    padding-inline: clamp(24px, 3vw, 44px);
  }

  .brand-bar {
    display: none;
  }

  .bar-status {
    display: inline-flex;
    margin-left: auto;
  }

  .header-nav {
    display: flex;
  }

  .header-cta {
    display: inline-flex;
  }

  .nav-toggle {
    display: none;
  }

  .nav-drawer {
    display: none;
  }

  .scroll-progress {
    left: var(--rail);
    width: calc(100% - var(--rail));
  }

  .footer-grid {
    grid-template-columns: 1.4fr 0.8fr 1fr;
    gap: 48px;
  }
}

@media (min-width: 1440px) {
  :root {
    --rail: 256px;
  }
}

@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;
  }
}