:root {
  --color-bg: #0A1128;
  --color-bg-panel: #1B2A4A;
  --color-neon: #00E5A0;
  --color-orange: #FF6D2E;
  --color-text: #EAF2FF;
  --color-text-muted: #8A9BC1;
  --color-violet: #5327A3;
  --color-yellow: #F2C94C;
  --font-head: Impact, 'Arial Black', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'SF Mono', 'Cascadia Mono', 'Roboto Mono', Consolas, monospace;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-pill: 999px;
  --container: 1280px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --header-bg: rgba(10, 17, 40, 0.92);
  --border-soft: rgba(138, 155, 193, 0.16);
}

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(138, 155, 193, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(138, 155, 193, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
}

body::after {
  content: '';
  position: fixed;
  top: -18vmax;
  right: -14vmax;
  width: 55vmax;
  height: 55vmax;
  border-radius: 50%;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(circle, rgba(83, 39, 163, 0.16), transparent 65%);
}

main,
#main-content {
  display: block;
  position: relative;
  z-index: 2;
  flex: 1 0 auto;
  min-height: 55vh;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 900;
  line-height: 1.15;
  margin: 0 0 16px;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

p {
  margin: 0 0 16px;
}

a {
  color: var(--color-neon);
  text-decoration: none;
  transition: color var(--transition);
}

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

ul, ol {
  margin: 0;
  padding: 0;
}

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

button {
  font-family: var(--font-body);
  cursor: pointer;
}

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

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 48px);
}

.skip-link {
  position: fixed;
  top: -56px;
  left: 16px;
  z-index: 3000;
  padding: 10px 24px;
  background: var(--color-neon);
  color: #0A1128;
  font-size: 0.875rem;
  font-weight: 700;
  border-radius: 0 0 12px 12px;
  transition: top 0.3s ease;
  text-decoration: none;
  box-shadow: 0 4px 24px rgba(0, 229, 160, 0.35);
}

.skip-link:focus {
  top: 0;
  color: #0A1128;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  z-index: 4000;
  background: linear-gradient(90deg, var(--color-neon), var(--color-orange));
  box-shadow: 0 0 12px rgba(0, 229, 160, 0.6);
  pointer-events: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--header-bg);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-soft);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
}

.site-header__topbar {
  background: rgba(6, 10, 24, 0.72);
  border-bottom: 1px solid rgba(138, 155, 193, 0.08);
}

.site-header__topbar-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 5px clamp(16px, 4vw, 48px);
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  line-height: 1.4;
}

.site-header__status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  text-transform: uppercase;
}

.site-header__pulse {
  position: relative;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-neon);
  flex: 0 0 auto;
}

.site-header__pulse::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid var(--color-neon);
  animation: pulse-ring 2s ease-out infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.4); opacity: 1; }
  80%, 100% { transform: scale(1.8); opacity: 0; }
}

.site-header__ver {
  font-family: var(--font-mono);
  color: var(--color-yellow);
  padding: 2px 10px;
  border: 1px solid rgba(242, 201, 76, 0.35);
  border-radius: var(--radius-pill);
  font-size: 0.62rem;
}

.site-header__icp {
  margin-left: auto;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.site-header__mast {
  position: relative;
  border-bottom: 1px solid rgba(138, 155, 193, 0.08);
}

.site-header__mast::after {
  content: '';
  position: absolute;
  top: 8px;
  right: clamp(16px, 5vw, 72px);
  width: 64px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-orange), transparent);
  opacity: 0.7;
  pointer-events: none;
}

.site-header__mast-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 20px clamp(16px, 4vw, 48px) 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.site-header__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  color: var(--color-text);
  transition: opacity 0.25s ease;
}

.site-header__brand:hover {
  color: var(--color-text);
  opacity: 0.88;
}

.site-header__logo {
  font-family: var(--font-head);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.07em;
  position: relative;
  text-shadow: 0 0 40px rgba(0, 229, 160, 0.25);
}

.site-header__logo::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 4%;
  width: 92%;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--color-neon), var(--color-orange));
  opacity: 0.85;
}

.site-header__tag {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-top: 8px;
  white-space: nowrap;
}

.site-header__toggle {
  display: none;
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid rgba(138, 155, 193, 0.25);
  border-radius: 12px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: border-color 0.25s ease, background 0.25s ease;
}

.site-header__toggle:hover {
  border-color: var(--color-neon);
  background: rgba(0, 229, 160, 0.08);
}

.site-header__toggle-line {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-text);
  transition: transform 0.3s ease, opacity 0.3s ease, background 0.3s ease;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
  background: var(--color-neon);
}

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

.site-header__toggle[aria-expanded="true"] .site-header__toggle-line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
  background: var(--color-neon);
}

.site-header__bar {
  background: rgba(27, 42, 74, 0.35);
  border-top: 1px solid rgba(138, 155, 193, 0.07);
}

.site-header__nav {
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: clamp(16px, 4vw, 48px);
  min-height: 52px;
}

.site-header__list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 2px;
}

.site-header__link {
  display: block;
  padding: 15px 16px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.06em;
  position: relative;
  transition: color 0.25s ease;
  white-space: nowrap;
}

.site-header__link::after {
  content: '';
  position: absolute;
  bottom: 8px;
  left: 16px;
  right: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-neon);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.site-header__link:hover {
  color: var(--color-neon);
}

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

.site-header__link[aria-current="page"] {
  color: var(--color-text);
  font-weight: 700;
}

.site-header__download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-left: 20px;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  background: var(--color-neon);
  color: #0A1128;
  font-size: 0.875rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
  transition: box-shadow 0.3s ease, transform 0.3s ease, background 0.3s ease;
}

.site-header__download:hover {
  background: #00F0AA;
  color: #0A1128;
  box-shadow: 0 0 28px rgba(0, 229, 160, 0.5);
  transform: translateY(-2px);
}

.site-header__download:active {
  transform: translateY(0);
  box-shadow: 0 0 10px rgba(0, 229, 160, 0.3);
}

.site-header__download-icon {
  font-size: 1.1em;
  transition: transform 0.3s ease;
}

.site-header__download:hover .site-header__download-icon {
  transform: translate(2px, 2px);
}

.site-footer {
  position: relative;
  z-index: 3;
  background: linear-gradient(180deg, rgba(10, 17, 40, 0.9), #070D20 100%);
  border-top: 1px solid rgba(138, 155, 193, 0.14);
  margin-top: auto;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 229, 160, 0.5), rgba(255, 109, 46, 0.5), transparent);
  pointer-events: none;
}

.site-footer__top {
  max-width: var(--container);
  margin: 0 auto;
  padding: 60px clamp(16px, 4vw, 48px) 36px;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.4fr;
  gap: clamp(32px, 6vw, 72px);
}

.site-footer__brand-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.site-footer__logo {
  font-family: var(--font-head);
  font-size: 1.75rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  color: var(--color-text);
  text-decoration: none;
  line-height: 1;
  transition: color 0.25s ease;
}

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

.site-footer__sub {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-top: 6px;
}

.site-footer__about {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin: 20px 0 12px;
  max-width: 400px;
}

.site-footer__trust {
  font-size: 0.75rem;
  color: rgba(138, 155, 193, 0.8);
  line-height: 1.65;
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid var(--color-neon);
  max-width: 400px;
}

.site-footer__col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.site-footer__heading {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-yellow);
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(138, 155, 193, 0.12);
  width: 100%;
}

.site-footer__links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.site-footer__link {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  position: relative;
  padding-left: 18px;
  transition: color 0.25s ease, transform 0.25s ease;
}

.site-footer__link::before {
  content: '↗';
  position: absolute;
  left: 0;
  color: var(--color-neon);
  font-size: 0.8em;
  top: 0;
}

.site-footer__link:hover {
  color: var(--color-neon);
  transform: translateX(3px);
}

.site-footer__contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.site-footer__contact-item {
  display: block;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  text-decoration: none;
  transition: color 0.25s ease;
  word-break: break-all;
}

.site-footer__contact-item:hover {
  color: var(--color-neon);
}

.site-footer__meta {
  border-top: 1px solid rgba(138, 155, 193, 0.1);
  background: rgba(6, 10, 24, 0.5);
}

.site-footer__meta-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 16px clamp(16px, 4vw, 48px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.site-footer__copy {
  font-size: 0.78rem;
}

.site-footer__icp {
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1.4;
  text-decoration: none;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
  white-space: nowrap;
}

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

.btn--primary {
  background: var(--color-neon);
  color: #0A1128;
}

.btn--primary:hover {
  background: #00F0AA;
  color: #0A1128;
  box-shadow: 0 0 32px rgba(0, 229, 160, 0.45);
  transform: translateY(-2px);
}

.btn--outline {
  background: transparent;
  color: var(--color-neon);
  border-color: var(--color-neon);
}

.btn--outline:hover {
  background: rgba(0, 229, 160, 0.1);
  color: var(--color-neon);
  box-shadow: 0 0 24px rgba(0, 229, 160, 0.2);
  transform: translateY(-2px);
}

.btn--accent {
  background: var(--color-orange);
  color: #0A1128;
}

.btn--accent:hover {
  background: #FF7D42;
  color: #0A1128;
  box-shadow: 0 0 32px rgba(255, 109, 46, 0.45);
  transform: translateY(-2px);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 20px 0 0;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-text-muted);
  list-style: none;
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb__item + .breadcrumb__item::before {
  content: '/';
  color: rgba(138, 155, 193, 0.35);
}

.breadcrumb__link {
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: color 0.25s ease;
}

.breadcrumb__link:hover {
  color: var(--color-neon);
}

.breadcrumb__item:last-child {
  color: var(--color-text);
}

.page-title {
  padding: clamp(32px, 6vw, 64px) 0 clamp(24px, 4vw, 40px);
  position: relative;
}

.page-title__index {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 400;
  color: var(--color-neon);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin: 0 0 12px;
  display: block;
}

.page-title__heading {
  font-family: var(--font-head);
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: 0.01em;
  margin: 0;
  max-width: 12em;
}

.page-title__sub {
  font-size: 1rem;
  font-weight: 300;
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 16px 0 0;
  line-height: 1.8;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-head);
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  font-weight: 900;
  margin: 0 0 24px;
}

.section-title__num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--color-neon);
  letter-spacing: 0.1em;
  padding: 4px 14px;
  border: 1px solid rgba(0, 229, 160, 0.35);
  border-radius: var(--radius-pill);
  white-space: nowrap;
  text-transform: uppercase;
}

.card {
  background: linear-gradient(145deg, rgba(27, 42, 74, 0.7), rgba(27, 42, 74, 0.3));
  border: 1px solid rgba(138, 155, 193, 0.12);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3vw, 32px);
  transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 160, 0.3);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.35);
}

.card--accent {
  position: relative;
}

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

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

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

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.index-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 400;
  color: var(--color-text-muted);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
}

.index-label::before {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--color-neon);
  flex: 0 0 auto;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

#main-content {
  position: relative;
  z-index: 2;
  flex: 1 0 auto;
}

@media (max-width: 1100px) {
  .site-header__link {
    padding: 15px 10px;
    font-size: 0.82rem;
  }

  .site-header__link::after {
    left: 10px;
    right: 10px;
  }

  .site-header__download {
    margin-left: 10px;
    padding: 10px 16px;
    font-size: 0.82rem;
  }

  .site-footer__grid {
    grid-template-columns: 1.6fr 1fr 1.3fr;
    gap: 32px;
  }
}

@media (max-width: 767px) {
  body {
    font-size: 0.95rem;
  }

  .site-header__topbar-inner {
    padding: 4px 14px;
    font-size: 0.6rem;
  }

  .site-header__status-text {
    display: none;
  }

  .site-header__ver {
    font-size: 0.56rem;
    padding: 2px 8px;
  }

  .site-header__mast-inner {
    padding: 16px 14px 14px;
    justify-content: center;
  }

  .site-header__mast::after {
    right: 16px;
    width: 40px;
  }

  .site-header__logo {
    font-size: 1.75rem;
  }

  .site-header__tag {
    font-size: 0.55rem;
    letter-spacing: 0.2em;
    margin-top: 6px;
  }

  .site-header__toggle {
    display: flex;
    right: 12px;
  }

  .site-header__bar {
    background: transparent;
    border-top: none;
  }

  .site-header__nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    min-height: 0;
    background: rgba(10, 17, 40, 0.98);
    border-bottom: 1px solid rgba(138, 155, 193, 0.18);
    padding: 12px 20px 20px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
  }

  .site-header__nav[data-open] {
    display: flex;
  }

  .site-header__list {
    flex-direction: column;
    width: 100%;
    gap: 0;
  }

  .site-header__item {
    width: 100%;
  }

  .site-header__link {
    padding: 13px 8px;
    font-size: 1rem;
    text-align: center;
    border-bottom: 1px solid rgba(138, 155, 193, 0.08);
  }

  .site-header__link::after {
    bottom: 6px;
    left: 50%;
    right: auto;
    width: 40px;
    transform: translateX(-50%) scaleX(0);
  }

  .site-header__link:hover::after,
  .site-header__link[aria-current="page"]::after {
    transform: translateX(-50%) scaleX(1);
  }

  .site-header__download {
    margin: 16px 0 4px;
    justify-content: center;
    width: 100%;
  }

  .site-footer__top {
    padding: 44px 16px 28px;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .site-footer__about,
  .site-footer__trust {
    max-width: 100%;
  }

  .site-footer__meta-inner {
    padding: 14px 16px;
    flex-direction: column;
    text-align: center;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .page-title {
    padding: 28px 0 24px;
  }

  .page-title__heading {
    font-size: clamp(2rem, 9vw, 3rem);
  }

  .section-title {
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .site-header__icp {
    display: block;
    max-width: 50%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .site-header__mast-inner {
    padding: 14px 12px 12px;
  }

  .site-header__logo {
    font-size: 1.55rem;
  }

  .site-header__tag {
    font-size: 0.5rem;
  }

  .site-footer__grid {
    gap: 24px;
  }
}

@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;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .site-header__pulse::after {
    animation: none;
    opacity: 0;
  }
}