:root {
  --color-primary: #0A1F44;
  --color-primary-deep: #071733;
  --color-primary-soft: #0D2B56;
  --color-gold: #D4AF37;
  --color-gold-bright: #E6C75C;
  --color-gold-dim: #B8942B;
  --color-orange: #FF6B35;
  --color-orange-deep: #E85326;
  --color-text: #FFFFFF;
  --color-muted: #B0B8C8;
  --color-surface-light: #F5F7FA;
  --color-surface-dark: #0D2B56;
  --color-border: #3A5A80;
  --color-success: #2E8B57;
  --color-warning: #E74C3C;

  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-pill: 999px;

  --container: 1240px;
  --gutter: 24px;
  --h-header: 76px;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --speed-fast: 0.18s;
  --speed-base: 0.32s;
  --speed-slow: 0.55s;

  --shadow-header: 0 8px 32px rgba(2, 10, 30, 0.4);
  --shadow-card: 0 16px 40px rgba(2, 10, 30, 0.35);
}

@media (max-width: 960px) {
  :root {
    --h-header: 64px;
    --gutter: 20px;
  }
}

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

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

body {
  margin: 0;
  padding-top: var(--h-header);
  background: var(--color-primary);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--color-gold);
  transition: color var(--speed-fast) var(--ease-out);
}

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

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.5em;
  font-family: var(--font-sans);
  line-height: 1.2;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.01em;
  text-wrap: balance;
}

h1 { font-size: clamp(2.25rem, 4.5vw, 3.75rem); font-weight: 900; }
h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); font-weight: 800; }
h3 { font-size: clamp(1.25rem, 1.8vw, 1.5rem); font-weight: 700; }
h4 { font-size: 1.125rem; font-weight: 700; }

p {
  margin: 0 0 1em;
}

ul, ol {
  margin: 0 0 1em;
  padding-left: 1.4em;
}

li {
  margin-bottom: 0.4em;
}

blockquote {
  margin: 1.6em 0;
  padding: 16px 24px;
  border-left: 3px solid var(--color-gold);
  background: rgba(212, 175, 55, 0.06);
  border-radius: var(--radius-sm);
  color: var(--color-text);
}

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

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-primary-deep);
}

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-pill);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-gold);
}

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

[hidden] {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

#main-content {
  scroll-margin-top: calc(var(--h-header) + 16px);
}

.section {
  padding: 72px 0;
}

.section-sm {
  padding: 40px 0;
}

.section-dark {
  background: var(--color-primary-deep);
  border-top: 1px solid rgba(58, 90, 128, 0.35);
  border-bottom: 1px solid rgba(58, 90, 128, 0.35);
}

.section-light {
  background: var(--color-surface-light);
  color: var(--color-primary);
  border-top: 1px solid rgba(58, 90, 128, 0.15);
  border-bottom: 1px solid rgba(58, 90, 128, 0.15);
}

.section-light h1,
.section-light h2,
.section-light h3,
.section-light h4,
.section-light p {
  color: var(--color-primary);
}

.section-light .text-muted,
.section-light .section-desc {
  color: #5A6B85;
}

.section-head {
  max-width: 720px;
  margin-bottom: 48px;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 900;
  margin-bottom: 12px;
}

.section-desc {
  font-size: 16px;
  color: var(--color-muted);
  line-height: 1.7;
  margin: 0;
}

.display-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.lead {
  font-size: 17px;
  line-height: 1.8;
  color: var(--color-muted);
  max-width: 640px;
}

.prose {
  max-width: 720px;
  font-size: 16px;
  line-height: 1.85;
}

.prose p {
  margin-bottom: 1.6em;
}

.prose strong {
  color: var(--color-gold);
  font-weight: 700;
}

.prose h2 {
  margin-top: 2.2em;
  font-size: 1.75rem;
  font-weight: 800;
}

.prose h3 {
  margin-top: 1.6em;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-gold);
}

.prose ul,
.prose ol {
  margin-bottom: 1.6em;
}

.prose li {
  margin-bottom: 0.6em;
}

.text-gold {
  color: var(--color-gold) !important;
}

.text-muted {
  color: var(--color-muted) !important;
}

.text-center {
  text-align: center;
}

.text-bold {
  font-weight: 700;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color var(--speed-fast) var(--ease-out), border-color var(--speed-fast) var(--ease-out), color var(--speed-fast) var(--ease-out), transform var(--speed-fast) var(--ease-out), box-shadow var(--speed-fast) var(--ease-out);
}

.btn:hover {
  transform: translateY(-2px);
}

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

.btn-gold {
  background: linear-gradient(135deg, var(--color-gold-bright), var(--color-gold));
  color: var(--color-primary);
  box-shadow: 0 8px 20px rgba(212, 175, 55, 0.2);
}

.btn-gold:hover {
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-dim));
  color: var(--color-primary);
  box-shadow: 0 12px 28px rgba(212, 175, 55, 0.35);
}

.btn-orange {
  background: var(--color-orange);
  color: #FFFFFF;
  box-shadow: 0 8px 20px rgba(255, 107, 53, 0.25);
}

.btn-orange:hover {
  background: var(--color-orange-deep);
  color: #FFFFFF;
  box-shadow: 0 12px 28px rgba(255, 107, 53, 0.35);
}

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

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

.btn-sm {
  padding: 8px 18px;
  font-size: 13px;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 17px;
}

.btn-block {
  display: flex;
  width: 100%;
}

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

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: 24px;
}

@media (min-width: 641px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 961px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

.card {
  background: var(--color-surface-dark);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: border-color var(--speed-base) var(--ease-out), transform var(--speed-base) var(--ease-out), box-shadow var(--speed-base) var(--ease-out);
}

.card:hover {
  border-color: rgba(212, 175, 55, 0.5);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.card-light {
  background: var(--color-surface-light);
  border: none;
  color: var(--color-primary);
}

.card-light h1,
.card-light h2,
.card-light h3,
.card-light h4,
.card-light p {
  color: var(--color-primary);
}

.doc-card {
  position: relative;
  display: block;
  padding: 48px 28px 28px;
  background: var(--color-surface-dark);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--color-text);
  overflow: hidden;
  transition: border-color var(--speed-base) var(--ease-out), transform var(--speed-base) var(--ease-out), box-shadow var(--speed-base) var(--ease-out);
}

.doc-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-orange));
}

.doc-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 24px;
  width: 48px;
  height: 18px;
  background: var(--color-gold);
  border-radius: 0 0 8px 8px;
  transition: transform var(--speed-base) var(--ease-out);
}

.doc-card:hover {
  transform: translateY(-4px);
  border-color: rgba(212, 175, 55, 0.6);
  box-shadow: var(--shadow-card);
}

.doc-card:hover::after {
  transform: scaleX(1.1);
}

.stat {
  padding: 24px;
  border-radius: var(--radius-md);
  background: rgba(13, 43, 86, 0.6);
  border: 1px solid var(--color-border);
  text-align: center;
}

.stat-num {
  display: block;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  line-height: 1;
  color: var(--color-gold);
  letter-spacing: -0.02em;
}

.stat-label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-muted);
  letter-spacing: 0.06em;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.6;
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid rgba(212, 175, 55, 0.35);
  color: var(--color-gold);
}

.tag-gold {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-primary);
}

.tag-orange {
  background: rgba(255, 107, 53, 0.12);
  border-color: rgba(255, 107, 53, 0.4);
  color: var(--color-orange);
}

.tag-outline {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-muted);
}

.timeline {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-gold) 0%, var(--color-border) 100%);
}

.timeline-item {
  position: relative;
  padding: 0 0 36px 40px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-mark {
  position: absolute;
  left: 0;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid var(--color-gold);
  box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.18);
}

.list-check {
  list-style: none;
  margin: 0;
  padding: 0;
}

.list-check li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 12px;
}

.list-check li::before {
  content: '';
  position: absolute;
  left: 2px;
  top: 8px;
  width: 12px;
  height: 6px;
  border-left: 2px solid var(--color-gold);
  border-bottom: 2px solid var(--color-gold);
  transform: rotate(-45deg);
}

.divider {
  height: 1px;
  border: none;
  background: linear-gradient(90deg, var(--color-border), rgba(58, 90, 128, 0));
  margin: 32px 0;
}

.code-inline {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.9em;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid rgba(212, 175, 55, 0.3);
  color: var(--color-gold);
}

.kbd {
  display: inline-block;
  padding: 2px 8px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.85em;
  border-radius: 6px;
  background: var(--color-surface-dark);
  border: 1px solid var(--color-border);
  border-bottom-width: 2px;
  color: var(--color-text);
}

.img-frame,
.img-card,
.img-hero {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, var(--color-primary-soft), var(--color-primary-deep));
}

.img-frame::before,
.img-card::before,
.img-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 0%, transparent 38%, rgba(212, 175, 55, 0.18) 50%, transparent 62%, transparent 100%);
  background-size: 280% 100%;
  background-position: 100% 0;
  animation: light-sweep 5.5s ease-in-out infinite alternate;
  pointer-events: none;
  z-index: 1;
}

.img-frame {
  aspect-ratio: 16 / 9;
}

.img-card {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-md);
}

.img-hero {
  aspect-ratio: 21 / 9;
  border-radius: var(--radius-xl);
}

@keyframes light-sweep {
  0% { background-position: 100% 0; }
  100% { background-position: 0% 0; }
}

.breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 20px 0 0;
  font-size: 13px;
  color: var(--color-muted);
}

.breadcrumbs a {
  color: var(--color-muted);
  text-decoration: none;
  transition: color var(--speed-fast) var(--ease-out);
}

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

.crumb-sep {
  color: var(--color-border);
  user-select: none;
}

.crumb-current {
  color: var(--color-text);
  font-weight: 500;
}

.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 48px;
}

.page-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-muted);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--speed-fast) var(--ease-out);
}

.page-link:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.page-link.is-current {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-primary);
  font-weight: 700;
}

.page-link.is-disabled {
  opacity: 0.4;
  pointer-events: none;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  padding: 10px 20px;
  background: var(--color-gold);
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-pill);
  opacity: 0;
  transform: translateY(-14px);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.skip-link:focus {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 31, 68, 0.86);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--speed-base) var(--ease-out), box-shadow var(--speed-base) var(--ease-out);
}

.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-gold) 0%, var(--color-orange) 100%);
  opacity: 0.85;
  z-index: 2;
}

.site-header.is-scrolled {
  background: rgba(7, 23, 51, 0.96);
  box-shadow: var(--shadow-header);
}

.scroll-progress {
  position: absolute;
  bottom: -2px;
  left: 0;
  height: 2px;
  width: 100%;
  background: linear-gradient(90deg, var(--color-gold), var(--color-orange));
  transform: scaleX(0);
  transform-origin: left center;
  z-index: 3;
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  height: var(--h-header);
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--color-text);
  flex-shrink: 0;
  transition: opacity var(--speed-fast) var(--ease-out);
}

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

.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-gold-bright), var(--color-gold));
  color: var(--color-primary);
  font-size: 20px;
  font-weight: 900;
  box-shadow: 0 4px 16px rgba(212, 175, 55, 0.3);
}

.brand-text {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 2px;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 10px 16px;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-muted);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color var(--speed-fast) var(--ease-out), background-color var(--speed-fast) var(--ease-out);
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: -1px;
  height: 2px;
  background: var(--color-gold);
  border-radius: var(--radius-pill);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--speed-base) var(--ease-out);
}

.nav-link:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.05);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link[aria-current="page"] {
  color: var(--color-gold);
  font-weight: 700;
}

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

.nav-cta {
  margin-left: 18px;
  padding: 10px 22px;
  font-size: 14px;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-left: 8px;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  cursor: pointer;
  transition: border-color var(--speed-fast) var(--ease-out), background-color var(--speed-fast) var(--ease-out);
}

.nav-toggle:hover {
  border-color: var(--color-gold);
  background: rgba(212, 175, 55, 0.08);
}

.nav-toggle-box {
  position: relative;
  width: 18px;
  height: 14px;
}

.nav-toggle-bar {
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  border-radius: var(--radius-pill);
  background: var(--color-text);
  transition: transform 0.25s var(--ease-out), opacity 0.2s ease;
}

.nav-toggle-bar:nth-child(1) { top: 0; }
.nav-toggle-bar:nth-child(2) { top: 6px; }
.nav-toggle-bar:nth-child(3) { top: 12px; }

.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);
}

@media (max-width: 960px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: var(--h-header);
    left: 12px;
    right: 12px;
    z-index: 90;
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin: 0;
    padding: 16px;
    border-radius: var(--radius-lg);
    background: rgba(8, 23, 48, 0.98);
    border: 1px solid var(--color-border);
    box-shadow: 0 24px 60px rgba(2, 10, 30, 0.5);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px) scale(0.98);
    pointer-events: none;
    transition: opacity 0.25s var(--ease-out), transform 0.25s var(--ease-out), visibility 0.25s;
  }

  .site-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
    pointer-events: auto;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-item:not(:last-child) {
    border-bottom: 1px solid rgba(58, 90, 128, 0.3);
  }

  .nav-link {
    display: block;
    width: 100%;
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    border-left: 3px solid transparent;
  }

  .nav-link[aria-current="page"] {
    border-left-color: var(--color-gold);
    background: rgba(212, 175, 55, 0.08);
  }

  .nav-cta {
    width: 100%;
    margin: 12px 0 4px;
  }
}

.page-hero {
  position: relative;
  padding: 64px 0 56px;
  background: linear-gradient(160deg, var(--color-primary-soft) 0%, var(--color-primary-deep) 100%);
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}

.page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 85% 20%, rgba(212, 175, 55, 0.12) 0%, transparent 40%),
    radial-gradient(ellipse at 20% 80%, rgba(255, 107, 53, 0.08) 0%, transparent 35%);
  pointer-events: none;
}

.page-hero-title {
  font-size: clamp(1.75rem, 3.5vw, 3rem);
  font-weight: 900;
  margin: 8px 0 12px;
  position: relative;
  z-index: 1;
}

.page-hero-desc {
  font-size: 16px;
  color: var(--color-muted);
  max-width: 640px;
  position: relative;
  z-index: 1;
}

.site-footer {
  position: relative;
  background: var(--color-primary-deep);
  color: var(--color-text);
  border-top: 1px solid var(--color-border);
  padding-bottom: 28px;
}

.footer-rule {
  position: absolute;
  top: -3px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-gold) 0%, var(--color-orange) 100%);
  opacity: 0.8;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.3fr 1.2fr 1.4fr;
  gap: 48px;
  padding-top: 64px;
  padding-bottom: 48px;
}

.footer-brand-col .brand {
  margin-bottom: 4px;
}

.footer-tagline {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-gold);
  letter-spacing: 0.16em;
  margin: 16px 0 8px;
}

.footer-about {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-muted);
  max-width: 360px;
  margin: 0;
}

.footer-heading {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--color-gold);
  margin: 0 0 18px;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  columns: 2;
  column-gap: 24px;
}

.footer-links li {
  break-inside: avoid;
  margin-bottom: 0;
}

.footer-link {
  display: inline-block;
  padding: 5px 0;
  color: var(--color-muted);
  text-decoration: none;
  font-size: 14px;
  transition: color var(--speed-fast) var(--ease-out), padding-left var(--speed-fast) var(--ease-out);
}

.footer-link:hover {
  color: var(--color-gold);
  padding-left: 4px;
}

.footer-contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-contact-item {
  padding: 10px 0;
  border-bottom: 1px solid rgba(58, 90, 128, 0.35);
}

.footer-contact-item:last-child {
  border-bottom: none;
}

.footer-contact-label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-gold);
  margin-bottom: 3px;
}

.footer-contact-text {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.5;
  display: block;
}

.footer-bottom {
  border-top: 1px solid rgba(58, 90, 128, 0.4);
  padding: 18px 0;
  background: rgba(4, 14, 34, 0.4);
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.copyright,
.footer-note {
  font-size: 13px;
  color: var(--color-muted);
  margin: 0;
}

.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: var(--color-gold);
  color: var(--color-primary);
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(212, 175, 55, 0.3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px) scale(0.92);
  transition: opacity var(--speed-base) var(--ease-out), transform var(--speed-base) var(--ease-out), visibility var(--speed-base);
  z-index: 80;
}

.back-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.back-top:hover {
  background: var(--color-orange);
  color: #FFFFFF;
  box-shadow: 0 10px 26px rgba(255, 107, 53, 0.4);
}

.back-top-icon {
  display: block;
  transform: translateY(-1px);
}

[data-tabs] {
  margin-top: 28px;
}

[data-tab-list] {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0 0 24px;
  padding: 0 0 12px;
  border-bottom: 1px solid var(--color-border);
}

[data-tab-trigger] {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-muted);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  cursor: pointer;
  transition: all var(--speed-fast) var(--ease-out);
}

[data-tab-trigger]:hover {
  border-color: var(--color-gold);
  color: var(--color-text);
}

[data-tab-trigger][aria-selected="true"] {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-primary);
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(212, 175, 55, 0.25);
}

[data-tab-panel] {
  color: var(--color-muted);
  font-size: 15px;
  line-height: 1.7;
}

[data-tab-panel][hidden] {
  display: none !important;
}

[data-accordion-item] {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-dark);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color var(--speed-base) var(--ease-out);
}

[data-accordion-item].is-open {
  border-color: var(--color-gold);
}

[data-accordion-header] {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 18px 24px;
  background: none;
  border: none;
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}

[data-accordion-header]::after {
  content: '';
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--color-gold);
  border-bottom: 2px solid var(--color-gold);
  transform: rotate(45deg);
  transition: transform var(--speed-base) var(--ease-out);
  flex-shrink: 0;
  margin-top: -4px;
}

[data-accordion-item].is-open [data-accordion-header]::after {
  transform: rotate(225deg);
  margin-top: 4px;
}

[data-accordion-panel] {
  padding: 0 24px 20px;
  color: var(--color-muted);
  font-size: 15px;
  line-height: 1.7;
}

[data-accordion-panel][hidden] {
  display: none !important;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
  will-change: opacity, transform;
}

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

@media (max-width: 960px) {
  .section {
    padding: 48px 0;
  }

  .section-head {
    margin-bottom: 32px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 40px;
    padding-top: 48px;
    padding-bottom: 40px;
  }

  .page-hero {
    padding: 48px 0 40px;
  }

  .back-top {
    right: 16px;
    bottom: 16px;
  }
}

@media (max-width: 640px) {
  .brand-text {
    font-size: 18px;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
    font-size: 18px;
    border-radius: 10px;
  }

  .gap-24 {
    gap: 16px;
  }

  .footer-links {
    columns: 1;
  }

  .footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .card,
  .doc-card {
    padding: 24px;
  }

  .doc-card {
    padding-top: 44px;
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding: 0 16px;
  }

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

  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }

  .btn {
    padding: 11px 20px;
    font-size: 14px;
  }

  .section {
    padding: 40px 0;
  }
}

@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 !important;
    transform: none !important;
    transition: none !important;
  }

  .back-top,
  .scroll-progress {
    transition: none !important;
  }
}