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

html {
  background-color: var(--bg-dark);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 520px;
  background:
    radial-gradient(ellipse 680px 320px at 16% -10%, rgba(255, 59, 48, 0.10) 0%, transparent 70%),
    radial-gradient(ellipse 760px 360px at 84% -10%, rgba(10, 132, 255, 0.12) 0%, transparent 70%),
    radial-gradient(ellipse 420px 220px at 52% -20%, rgba(48, 209, 88, 0.05) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

:root {
  --primary-red: #FF3B30;
  --primary-blue: #0A84FF;
  --primary-green: #30D158;
  --bg-dark: #0D0D14;
  --bg-panel: #16161E;
  --text-primary: #F5F5F7;
  --text-secondary: #A1A1A6;
  --border-subtle: #2C2C3A;
  --gradient-red-blue: linear-gradient(135deg, #FF3B30 0%, #0A84FF 100%);
  --gradient-blue-green: linear-gradient(135deg, #0A84FF 0%, #30D158 100%);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --font-display: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, "JetBrains Mono", "Cascadia Mono", Menlo, Consolas, monospace;
  --container-width: 1200px;
  --header-height: 72px;
  --transition-fast: 160ms;
  --transition-base: 260ms;
  --transition-slow: 420ms;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 72px;
}

::selection {
  background: rgba(10, 132, 255, 0.3);
  color: var(--text-primary);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--text-primary);
  line-height: 1.2;
  font-weight: 700;
  margin: 0 0 var(--space-3);
}

p {
  margin: 0 0 var(--space-3);
}

strong {
  font-weight: 700;
}

code, pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

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

a:hover {
  color: var(--primary-red);
}

ul, ol {
  list-style: none;
}

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
}

button {
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--primary-blue);
  outline-offset: 3px;
  border-radius: 4px;
}

main {
  display: block;
  position: relative;
  z-index: 1;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 10000;
  display: inline-block;
  padding: 10px 20px;
  background: var(--primary-blue);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  border-radius: 0 0 var(--radius-md) 0;
  transform: translateY(-120%);
  transition: transform var(--transition-base) ease;
}

.skip-link:focus-visible {
  transform: translateY(0);
  color: #fff;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--primary-red) 0%, var(--primary-blue) 50%, var(--primary-green) 100%);
  z-index: 10002;
  pointer-events: none;
  will-change: width;
  transition: width 80ms linear;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 13, 20, 0.88);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: var(--header-height);
  padding-top: 12px;
  padding-bottom: 12px;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
  color: var(--text-primary);
}

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

.site-brand__mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 10px 10px 10px 2px;
  background: var(--gradient-red-blue);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  letter-spacing: -0.02em;
  clip-path: polygon(0 0, 100% 0, 100% 78%, 82% 100%, 0 100%);
  box-shadow: 0 4px 16px rgba(255, 59, 48, 0.3);
}

.site-brand__copy {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.site-brand__name {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.01em;
  line-height: 1.15;
}

.site-brand__tagline {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.site-nav__link {
  display: inline-block;
  position: relative;
  padding: var(--space-2) var(--space-3);
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast) ease;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: var(--space-3);
  right: var(--space-3);
  bottom: 4px;
  height: 2px;
  background: var(--gradient-red-blue);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--transition-base) cubic-bezier(0.22, 1, 0.36, 1);
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--text-primary);
}

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after {
  transform: scaleX(1);
}

.site-nav__link[aria-current="page"] {
  color: var(--text-primary);
  font-weight: 600;
}

.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.site-nav__cta {
  flex-shrink: 0;
  padding: 8px 18px;
  font-size: 14px;
}

.site-nav__cta-arrow {
  display: inline-block;
  font-size: 16px;
  line-height: 1;
  transition: transform var(--transition-fast) ease;
}

.site-nav__cta:hover .site-nav__cta-arrow {
  transform: translateX(3px);
}

.site-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-panel);
}

.site-nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--text-primary);
  transition: transform var(--transition-base) ease, opacity var(--transition-base) ease;
}

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

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

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 10px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  text-align: center;
  cursor: pointer;
  transition: transform var(--transition-fast) ease, box-shadow var(--transition-fast) ease, background var(--transition-fast) ease, color var(--transition-fast) ease, border-color var(--transition-fast) ease;
}

.btn:active {
  transform: translateY(1px) scale(0.98);
}

.btn--gradient {
  background: var(--gradient-red-blue);
  color: #fff;
  box-shadow: 0 4px 16px rgba(255, 59, 48, 0.28);
}

.btn--gradient:hover {
  background: var(--gradient-blue-green);
  box-shadow: 0 8px 26px rgba(10, 132, 255, 0.32);
  color: #fff;
}

.btn--outline {
  background: transparent;
  border-color: var(--border-subtle);
  color: var(--text-primary);
}

.btn--outline:hover {
  border-color: var(--primary-blue);
  color: var(--primary-blue);
}

.site-footer {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, var(--bg-panel) 0%, var(--bg-dark) 100%);
  border-top: 1px solid var(--border-subtle);
}

.site-footer::before {
  content: "2026";
  position: absolute;
  top: 20px;
  right: 20px;
  font-family: var(--font-display);
  font-size: 160px;
  font-weight: 900;
  line-height: 1;
  color: rgba(255, 255, 255, 0.03);
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.045);
  letter-spacing: -0.04em;
  pointer-events: none;
  z-index: 0;
  user-select: none;
}

.site-footer__top,
.site-footer__bottom {
  position: relative;
  z-index: 1;
}

.site-footer__top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: var(--space-6);
  padding-top: var(--space-7);
  padding-bottom: var(--space-6);
}

.site-footer__brand {
  padding-right: var(--space-5);
}

.site-footer__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.site-footer__logo:hover {
  color: var(--text-primary);
}

.site-footer__logo-mark {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 6px 6px 6px 2px;
  background: var(--gradient-blue-green);
  color: #fff;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 800;
}

.site-footer__slogan {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
}

.site-footer__trust {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 320px;
  margin-bottom: 0;
}

.site-footer__heading {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--border-subtle);
}

.site-footer__navlist {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.site-footer__navlist a {
  color: var(--text-secondary);
  font-size: 14px;
  transition: color var(--transition-fast) ease;
}

.site-footer__navlist a:hover {
  color: var(--primary-green);
}

.site-footer__contact-item {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.site-footer__contact-item::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary-green);
  margin-right: 8px;
  vertical-align: middle;
}

.site-footer__bottom {
  border-top: 1px solid var(--border-subtle);
  padding: var(--space-4) 0;
}

.site-footer__bottom-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  column-gap: var(--space-5);
  row-gap: var(--space-2);
  font-size: 13px;
  color: var(--text-secondary);
}

.site-footer__bottom-inner p {
  margin: 0;
}

.site-footer__bottom-inner .site-footer__note {
  flex-basis: 100%;
  margin-top: var(--space-1);
  text-align: center;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) 0;
  font-size: 13px;
  color: var(--text-secondary);
}

.breadcrumb a {
  color: var(--text-secondary);
  transition: color var(--transition-fast) ease;
}

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

.breadcrumb__sep {
  color: var(--border-subtle);
  user-select: none;
}

.section {
  position: relative;
  padding: var(--space-7) 0;
}

.section--panel {
  background: var(--bg-panel);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section__head {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.section__index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--primary-blue);
  padding: 5px 12px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin: 0;
}

.section__desc {
  margin-top: var(--space-2);
  font-size: 15px;
  color: var(--text-secondary);
  max-width: 540px;
}

.grid {
  display: grid;
  gap: var(--space-4);
}

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

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

.card {
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  transition: transform var(--transition-base) ease, box-shadow var(--transition-base) ease, border-color var(--transition-base) ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
  border-color: rgba(10, 132, 255, 0.4);
}

.card__title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text-primary);
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  white-space: nowrap;
}

.badge--red {
  color: var(--primary-red);
  border-color: rgba(255, 59, 48, 0.4);
  background: rgba(255, 59, 48, 0.08);
}

.badge--blue {
  color: var(--primary-blue);
  border-color: rgba(10, 132, 255, 0.4);
  background: rgba(10, 132, 255, 0.08);
}

.badge--green {
  color: var(--primary-green);
  border-color: rgba(48, 209, 88, 0.4);
  background: rgba(48, 209, 88, 0.08);
}

.media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--bg-panel);
  aspect-ratio: 16 / 9;
}

.media--4-3 {
  aspect-ratio: 4 / 3;
}

.media--1-1 {
  aspect-ratio: 1 / 1;
}

.media--3-2 {
  aspect-ratio: 3 / 2;
}

.media__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--bg-panel) 0%, #1F1F2B 100%);
  color: var(--text-secondary);
  font-size: 13px;
  letter-spacing: 0.08em;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--transition-slow) ease, transform var(--transition-slow) cubic-bezier(0.22, 1, 0.36, 1);
}

[data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

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

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(22, 22, 30, 0.97);
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.4);
    padding: var(--space-4) var(--space-4) var(--space-5);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--transition-base) ease, transform var(--transition-base) ease, visibility 0s linear var(--transition-base);
  }

  .site-nav[data-open],
  .site-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition: opacity var(--transition-base) ease, transform var(--transition-base) ease, visibility 0s;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-bottom: var(--space-3);
  }

  .site-nav__item {
    border-bottom: 1px solid var(--border-subtle);
  }

  .site-nav__item:last-child {
    border-bottom: none;
  }

  .site-nav__link {
    display: block;
    padding: var(--space-3) 0;
    border-radius: 0;
    font-size: 16px;
  }

  .site-nav__link::after {
    left: 0;
    right: auto;
    width: 24px;
    bottom: 8px;
  }

  .site-nav__cta {
    width: 100%;
    justify-content: center;
    padding: 12px 18px;
  }

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

  .site-footer__top {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-5);
  }

  .site-footer__brand {
    grid-column: 1 / -1;
    padding-right: 0;
  }
}

@media (max-width: 560px) {
  :root {
    --space-7: 56px;
    --space-6: 40px;
  }

  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .site-brand__name {
    font-size: 16px;
  }

  .site-brand__tagline {
    font-size: 10px;
  }

  .site-header__inner {
    gap: var(--space-3);
  }

  .site-footer__top {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .site-footer__brand {
    grid-column: auto;
  }

  .site-footer__bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  .site-footer__bottom-inner .site-footer__note {
    text-align: left;
  }

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

  .section__head {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
}

@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-progress {
    transition: none;
  }

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