:root {
  --color-bg: #0A0E17;
  --color-surface: #111827;
  --color-surface-raised: #1F2937;
  --color-accent: #FF6B1A;
  --color-accent-2: #00E5FF;
  --color-text: #F9FAFB;
  --color-text-muted: #9CA3AF;
  --color-success: #10B981;
  --font-headline: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: Inter, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --radius-pill: 999px;
  --radius-lg: 16px;
  --radius-md: 12px;
  --shadow-header: 0 8px 32px rgba(0, 0, 0, 0.45);
  --hairline: 1px solid rgba(255, 255, 255, 0.06);
  --transition-fast: 150ms ease;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headline);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: -1px;
  line-height: 1.1;
  color: var(--color-text);
  transform: skew(-6deg);
}

h1 { font-size: clamp(2.5rem, 6vw, 5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 3rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }

ul {
  list-style: none;
}

a {
  color: var(--color-accent-2);
  text-decoration: none;
}

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

button {
  font-family: inherit;
  font-size: 100%;
  line-height: 1;
  cursor: pointer;
}

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

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 10000;
  background: var(--color-accent);
  color: var(--color-bg);
  font-weight: 700;
  padding: 12px 24px;
  border-radius: 0 0 12px 0;
  text-decoration: none;
}

.skip-link:focus {
  left: 0;
}

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding-left: clamp(20px, 5vw, 48px);
  padding-right: clamp(20px, 5vw, 48px);
}

.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border: 1px solid transparent;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

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

.btn--primary:hover {
  background: #ff7f35;
  color: #0A0E17;
}

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

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

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
}

.breadcrumb a {
  color: var(--color-text-muted);
}

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

.breadcrumb [aria-current="page"] {
  color: var(--color-text);
}

.grid {
  display: grid;
  gap: 24px;
}

.grid--2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.panel {
  background: var(--color-surface);
  border: var(--hairline);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.media-box {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--color-surface-raised), var(--color-surface));
  border: var(--hairline);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.media-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 300ms ease;
}

.media-box:hover img {
  transform: scale(1.02);
}

.site-header {
  position: sticky;
  top: 16px;
  z-index: 1000;
  max-width: 1360px;
  margin: 16px auto 0;
  padding: 8px 16px;
  background: rgba(17, 24, 39, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: var(--hairline);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-header);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  color: var(--color-text);
  flex-shrink: 0;
}

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

.brand__name {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 1.75rem;
  text-transform: uppercase;
  letter-spacing: -1px;
  transform: skew(-6deg);
  line-height: 1;
}

.brand__tagline {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.site-nav {
  margin-left: auto;
  margin-right: 8px;
}

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

.site-nav__link {
  display: inline-block;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.site-nav__link:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.06);
}

.site-nav__link[aria-current="page"] {
  color: var(--color-bg);
  background: var(--color-accent);
}

.header-cta {
  display: inline-block;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: var(--color-bg);
  font-weight: 700;
  font-size: 0.9rem;
  white-space: nowrap;
  transition: background var(--transition-fast);
}

.header-cta:hover {
  background: #ff7f35;
  color: var(--color-bg);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  transition: background var(--transition-fast);
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.06);
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(6px) 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(-6px) rotate(-45deg);
}

.site-footer {
  background: var(--color-surface);
  border-top: var(--hairline);
  margin-top: 80px;
  padding: 48px 0 24px;
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 40px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 48px);
}

.site-footer__brand .brand__name {
  font-size: 1.5rem;
}

.site-footer__about {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  max-width: 36em;
  margin-top: 12px;
}

.site-footer__trust {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  border-left: 2px solid var(--color-accent);
  padding-left: 12px;
  margin-top: 16px;
}

.site-footer__heading {
  font-size: 1rem;
  margin-bottom: 16px;
}

.site-footer__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.site-footer__list a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

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

.site-footer__address {
  font-style: normal;
  color: var(--color-text-muted);
  margin-top: 16px;
}

.site-footer__contact-line {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  margin-top: 4px;
}

.site-footer__meta {
  border-top: var(--hairline);
  margin-top: 40px;
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(20px, 5vw, 48px);
  padding-right: clamp(20px, 5vw, 48px);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-2));
  z-index: 10001;
  pointer-events: none;
  transition: width 80ms linear;
}

@media (max-width: 1024px) {
  .site-header {
    max-width: calc(100% - 24px);
    border-radius: 24px;
  }

  .brand__tagline {
    display: none;
  }

  .site-nav__link {
    padding: 8px 12px;
    font-size: 0.85rem;
  }
}

@media (max-width: 767px) {
  .site-header {
    top: 8px;
    margin: 8px 12px 0;
    border-radius: 20px;
    padding: 6px 12px;
  }

  .site-header__inner {
    flex-wrap: wrap;
    gap: 8px;
  }

  .brand {
    margin-right: auto;
  }

  .brand__name {
    font-size: 1.35rem;
  }

  .header-cta {
    margin-left: 0;
    margin-right: 4px;
    padding: 8px 14px;
    font-size: 0.8rem;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    order: 5;
    width: 100%;
    margin: 8px 0 2px;
    border-top: var(--hairline);
    padding-top: 8px;
  }

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

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .site-nav__link {
    display: block;
    border-radius: 10px;
    text-align: right;
  }

  .site-nav__link[aria-current="page"] {
    color: var(--color-bg);
  }

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

  .site-footer__meta {
    flex-direction: column;
    gap: 4px;
    align-items: flex-start;
  }

  .grid--2,
  .grid--3 {
    grid-template-columns: 1fr;
  }
}

@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;
    scroll-behavior: auto !important;
  }

  .scroll-progress {
    transition: none;
  }
}