:root {
  --color-space: #1B1035;
  --color-nebula: #3B2A6D;
  --color-paper: #F5E6CA;
  --color-gold: #D4AF37;
  --color-coral: #FF7F3F;
  --color-violet: #4A3B7C;
  --color-silver: #C0C0C0;
  --color-white: #FFFFFF;
  --color-ink: #1A1A1A;
  --font-heading: 'Orbitron', 'Microsoft YaHei', 'PingFang SC', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-index: 'Rajdhani', 'Arial', 'PingFang SC', sans-serif;
  --header-height: 76px;
  --container: 1280px;
  --gutter: clamp(1rem, 4vw, 2rem);
  --radius: 16px;
  --shadow-card: 0 18px 42px rgba(0, 0, 0, 0.28);
  --shadow-gold: 0 0 22px rgba(212, 175, 55, 0.28);
  --ease: cubic-bezier(0.22, 0.75, 0.28, 1);
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-white);
  background-color: var(--color-space);
  background-image:
    radial-gradient(1px 1px at 12% 22%, rgba(255, 255, 255, 0.9) 0, transparent 100%),
    radial-gradient(1px 1px at 68% 12%, rgba(212, 175, 55, 0.9) 0, transparent 100%),
    radial-gradient(2px 2px at 82% 61%, rgba(255, 255, 255, 0.8) 0, transparent 100%),
    radial-gradient(1px 1px at 28% 71%, rgba(212, 175, 55, 0.8) 0, transparent 100%),
    radial-gradient(1px 1px at 47% 48%, rgba(255, 255, 255, 0.6) 0, transparent 100%),
    radial-gradient(circle at 18% 15%, var(--color-nebula) 0, transparent 45%),
    radial-gradient(circle at 82% -10%, var(--color-violet) 0, transparent 42%),
    radial-gradient(circle at 60% 110%, rgba(59, 42, 109, 0.75) 0, transparent 55%),
    linear-gradient(145deg, #1B1035 0%, #201745 100%);
  background-attachment: fixed;
}

body::selection {
  background: var(--color-gold);
  color: var(--color-ink);
}

#main-content {
  display: block;
  position: relative;
  z-index: 1;
  flex: 1 0 auto;
  outline: none;
  width: 100%;
}

img,
picture,
svg,
video,
canvas {
  max-width: 100%;
  display: block;
}

a {
  color: var(--color-gold);
  text-decoration: none;
  transition: color 0.25s var(--ease), background-color 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

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

p {
  margin: 0 0 1rem;
}

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

button {
  border: 0;
  padding: 0;
  background: none;
  font: inherit;
  color: inherit;
  cursor: pointer;
  appearance: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 1rem;
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-paper);
  text-shadow: 0 0 10px rgba(212, 175, 55, 0.45);
}

.container {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 3px;
  border-radius: 6px;
}

.skip-link {
  position: fixed;
  top: 0;
  left: 1rem;
  z-index: 2000;
  padding: 0.75rem 1.25rem;
  background: var(--color-paper);
  color: var(--color-ink);
  font-weight: 600;
  border-radius: 0 0 10px 10px;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
  transform: translateY(-160%);
  transition: transform 0.25s var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: linear-gradient(180deg, rgba(27, 16, 53, 0.97), rgba(27, 16, 53, 0.88));
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(212, 175, 55, 0.3);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.24);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-height);
  position: relative;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  flex-shrink: 0;
  color: var(--color-paper);
  text-decoration: none;
}

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

.brand-mark {
  position: relative;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1px solid rgba(212, 175, 55, 0.85);
  background:
    radial-gradient(circle at 32% 30%, rgba(255, 255, 255, 0.85) 0, transparent 12%),
    radial-gradient(circle at 65% 65%, var(--color-gold) 0, transparent 42%),
    radial-gradient(circle at center, var(--color-nebula), var(--color-space));
  box-shadow: 0 0 18px rgba(212, 175, 55, 0.4), inset 0 0 12px rgba(212, 175, 55, 0.18);
}

.brand-mark::before {
  content: "";
  position: absolute;
  inset: 7px;
  border-radius: 50%;
  border: 1px dashed rgba(212, 175, 55, 0.7);
  transform: rotate(24deg);
}

.brand-mark::after {
  content: "";
  position: absolute;
  top: 5px;
  left: 23px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-white);
  box-shadow: 0 0 8px var(--color-gold);
}

.brand-text {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: 0.12em;
  color: var(--color-paper);
  text-shadow: 0 0 12px rgba(212, 175, 55, 0.5);
  line-height: 1.2;
  text-transform: uppercase;
}

.brand-text small {
  display: block;
  font-family: var(--font-body);
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.24em;
  color: var(--color-silver);
  text-shadow: none;
  margin-top: 0.15rem;
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 46px;
  height: 46px;
  padding: 10px;
  margin-left: auto;
  border: 1px solid rgba(212, 175, 55, 0.4);
  border-radius: 10px;
  background: rgba(27, 16, 53, 0.8);
  transition: border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.nav-toggle:hover {
  border-color: var(--color-gold);
  background: rgba(59, 42, 109, 0.65);
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-gold);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--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);
}

.site-nav {
  margin-left: auto;
}

.nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.nav-item {
  list-style: none;
}

.nav-link {
  display: block;
  padding: 0.55rem 0.8rem;
  font-family: var(--font-index);
  font-size: 0.98rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--color-silver);
  border-radius: 8px;
  position: relative;
}

.nav-link:hover {
  color: var(--color-paper);
  background: rgba(212, 175, 55, 0.1);
}

.nav-link[aria-current="page"] {
  color: var(--color-paper);
  background: rgba(212, 175, 55, 0.12);
  box-shadow: inset 0 -2px 0 var(--color-gold);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: 0.75rem;
  padding: 0.58rem 1.2rem;
  background: var(--color-coral);
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  border-radius: 999px;
  box-shadow: 0 0 18px rgba(255, 127, 63, 0.35);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background-color 0.25s var(--ease);
}

.nav-cta:hover {
  background: var(--color-paper);
  color: var(--color-ink);
  box-shadow: 0 0 24px rgba(245, 230, 202, 0.35);
  transform: translateY(-2px);
}

.header-progress {
  position: absolute;
  bottom: -1px;
  left: 0;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--color-gold), var(--color-coral));
  box-shadow: 0 0 12px rgba(212, 175, 55, 0.8);
  z-index: 3;
}

@media (max-width: 899.98px) {
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-left: 0;
    padding: 1rem;
    background: linear-gradient(180deg, rgba(27, 16, 53, 0.99), rgba(20, 10, 40, 0.99));
    border-bottom: 1px solid rgba(212, 175, 55, 0.35);
    box-shadow: 0 18px 42px rgba(0, 0, 0, 0.4);
  }

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

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.2rem;
  }

  .nav-link {
    padding: 0.85rem 1rem;
    font-size: 1.05rem;
  }

  .nav-cta {
    margin: 0.85rem 0 0;
    width: 100%;
    padding: 0.85rem 1rem;
  }
}

@media (min-width: 900px) {
  .nav-toggle {
    display: none;
  }

  .site-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.25rem;
  }
}

.site-footer {
  position: relative;
  z-index: 1;
  background:
    radial-gradient(circle at 78% 20%, rgba(74, 59, 124, 0.5), transparent 42%),
    linear-gradient(180deg, rgba(27, 16, 53, 0.92), rgba(12, 6, 28, 0.99));
  border-top: 1px solid rgba(212, 175, 55, 0.25);
  padding: clamp(2.5rem, 6vw, 4rem) 0 1.5rem;
  margin-top: auto;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
  pointer-events: none;
}

.footer-grid {
  display: grid;
  gap: 2.2rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: 1.3fr 1fr;
  }
}

@media (min-width: 960px) {
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1.2fr;
  }
}

.footer-brand-name {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-paper);
  text-shadow: 0 0 12px rgba(212, 175, 55, 0.45);
  margin-bottom: 1rem;
}

.footer-brand-name:hover {
  color: var(--color-gold);
}

.footer-trust {
  color: var(--color-silver);
  font-size: 0.92rem;
  max-width: 44ch;
  line-height: 1.8;
}

.footer-heading {
  font-family: var(--font-index);
  font-size: 0.86rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gold);
  text-shadow: none;
  margin-bottom: 1rem;
}

.footer-links,
.footer-contact-list,
.legal-links {
  list-style: none;
}

.footer-links li,
.footer-contact-list li {
  margin-bottom: 0.45rem;
}

.footer-links a {
  display: inline-block;
  padding: 0.15rem 0;
  color: var(--color-silver);
  font-size: 0.95rem;
  position: relative;
}

.footer-links a::before {
  content: "› ";
  color: var(--color-gold);
}

.footer-links a:hover {
  color: var(--color-paper);
  transform: translateX(2px);
}

.footer-contact-list {
  color: var(--color-silver);
  font-size: 0.92rem;
  line-height: 1.7;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.9rem;
  margin-top: clamp(2rem, 5vw, 3rem);
  padding-top: 1.25rem;
  border-top: 1px solid rgba(212, 175, 55, 0.18);
  color: var(--color-silver);
  font-size: 0.84rem;
}

.footer-bottom p {
  margin: 0;
}

.legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
}

.legal-links a {
  color: var(--color-silver);
  font-size: 0.84rem;
  padding: 0.2rem 0;
}

.legal-links a:hover {
  color: var(--color-gold);
}

.section {
  position: relative;
  padding: clamp(3rem, 8vw, 6rem) 0;
}

.section-head {
  max-width: 720px;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.section-eyebrow {
  display: block;
  font-family: var(--font-index);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 0.8rem;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.12;
  margin-bottom: 1rem;
}

.section-copy {
  color: var(--color-silver);
  font-size: 1.05rem;
  max-width: 60ch;
}

.page-wrap {
  position: relative;
  z-index: 1;
  padding: clamp(2rem, 6vw, 5rem) 0;
}

.page-title {
  font-size: clamp(2.2rem, 6vw, 4rem);
  line-height: 1.08;
  margin-bottom: 1rem;
}

.lead {
  color: var(--color-silver);
  font-size: 1.14rem;
  max-width: 60ch;
}

.breadcrumb {
  font-family: var(--font-index);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  color: var(--color-silver);
  margin-bottom: 1.2rem;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background-color 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.btn-primary {
  background: var(--color-coral);
  color: var(--color-ink);
  box-shadow: 0 0 20px rgba(255, 127, 63, 0.35);
}

.btn-primary:hover {
  background: var(--color-paper);
  color: var(--color-ink);
  box-shadow: 0 0 26px rgba(245, 230, 202, 0.35);
  transform: translateY(-2px);
}

.btn-ghost {
  border: 1px solid rgba(212, 175, 55, 0.6);
  color: var(--color-gold);
  background: rgba(27, 16, 53, 0.5);
}

.btn-ghost:hover {
  background: rgba(212, 175, 55, 0.12);
  color: var(--color-paper);
  box-shadow: var(--shadow-gold);
  transform: translateY(-2px);
}

.btn-gold {
  background: var(--color-gold);
  color: var(--color-ink);
}

.btn-gold:hover {
  background: var(--color-paper);
  color: var(--color-ink);
  transform: translateY(-2px);
}

.card {
  position: relative;
  padding: 1.75rem;
  background:
    radial-gradient(circle at 85% 10%, rgba(74, 59, 124, 0.45), transparent 44%),
    linear-gradient(145deg, rgba(59, 42, 109, 0.9), rgba(27, 16, 53, 0.94));
  border: 1px solid rgba(212, 175, 55, 0.22);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.card:hover {
  border-color: rgba(212, 175, 55, 0.7);
  box-shadow: var(--shadow-card), var(--shadow-gold);
  transform: translateY(-5px);
}

.tilt-card {
  transform: rotate(-1.2deg);
}

.tilt-card:nth-child(even) {
  transform: rotate(1.1deg);
}

.tilt-card:hover,
.tilt-card:nth-child(even):hover {
  transform: rotate(0deg) translateY(-6px);
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.card-text {
  color: var(--color-silver);
  font-size: 0.94rem;
}

.chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.1rem;
  border: 1px solid rgba(212, 175, 55, 0.4);
  border-radius: 999px;
  background: rgba(27, 16, 53, 0.65);
  color: var(--color-paper);
  font-family: var(--font-index);
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  transition: background-color 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.chip:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
  box-shadow: var(--shadow-gold);
}

.chip[aria-pressed="true"] {
  background: var(--color-gold);
  color: var(--color-ink);
  border-color: var(--color-gold);
  box-shadow: 0 0 16px rgba(212, 175, 55, 0.5);
}

.visual-frame {
  position: relative;
  overflow: hidden;
  border-radius: 18px;
  border: 1px solid rgba(212, 175, 55, 0.2);
  background:
    radial-gradient(circle at 30% 25%, rgba(255, 255, 255, 0.12) 0, transparent 22%),
    radial-gradient(circle at 75% 70%, rgba(212, 175, 55, 0.22), transparent 52%),
    radial-gradient(circle at center, var(--color-nebula), var(--color-space));
  min-height: 150px;
}

.visual-frame::before {
  content: "";
  display: block;
  padding-top: 56.25%;
}

.visual-frame[data-aspect="square"]::before {
  padding-top: 100%;
}

.visual-frame[data-aspect="portrait"]::before {
  padding-top: 125%;
}

.visual-frame[data-aspect="landscape"]::before {
  padding-top: 56.25%;
}

.visual-frame > * {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.timeline {
  position: relative;
  display: grid;
  gap: 2rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--color-gold), transparent);
}

.timeline-item {
  position: relative;
  padding-left: 2.5rem;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 0.65rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-gold);
  box-shadow: 0 0 12px rgba(212, 175, 55, 0.75);
}

.tree {
  position: relative;
  display: grid;
  gap: 1rem;
  padding-left: 1rem;
}

.tree::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--color-gold), transparent);
}

.tree-node {
  position: relative;
  padding-left: 1.5rem;
}

.tree-node::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 0.72rem;
  width: 8px;
  height: 8px;
  background: var(--color-coral);
  border: 2px solid var(--color-gold);
  transform: rotate(45deg);
}

.orbit-divider {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  color: var(--color-gold);
  font-family: var(--font-index);
  letter-spacing: 0.2em;
}

.orbit-divider::before,
.orbit-divider::after {
  content: "";
  height: 1px;
  flex: 1;
  background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.6), transparent);
}

html.js [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

html.js [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  html:focus-within {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

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

  .header-progress {
    display: none;
  }
}

@media (max-width: 639.98px) {
  body {
    font-size: 15px;
  }

  .card {
    padding: 1.25rem;
  }

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