:root {
  --c-deep-blue: #0A1F44;
  --c-gold: #D4AF37;
  --c-orange: #FF6B35;
  --c-purple: #7B5CE6;
  --c-teal: #0F766E;
  --c-cream: #F8F5F0;
  --c-ink: #1F2937;
  --c-gray: #9CA3AF;
  --c-warning: #FBBF24;
  --c-white: #FFFFFF;
  --font-head: "Source Han Sans SC", "Noto Sans CJK SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", "SimSun", serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", "Cascadia Code", Consolas, "Courier New", monospace;
  --header-w: 280px;
  --space-page: 96px;
  --space-section: 72px;
  --content-w: 1200px;
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 12px;
  --radius-sm: 6px;
}

*, *::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: 16px;
  line-height: 1.6;
  color: var(--c-ink);
  background: var(--c-cream);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.5em;
  font-family: var(--font-head);
  font-weight: 900;
  color: var(--c-deep-blue);
  line-height: 1.2;
}
h1 { font-size: clamp(36px, 5vw, 60px); }
h2 { font-size: clamp(26px, 3.6vw, 40px); }
h3 { font-size: clamp(20px, 2.4vw, 28px); }
h4 { font-size: 20px; }
h5 { font-size: 16px; }
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; }
li { list-style: none; }
a { color: var(--c-orange); text-decoration: none; }
a:hover { color: var(--c-deep-blue); }
img, svg { display: block; max-width: 100%; }
button { font-family: inherit; }

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

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  background: var(--c-gold);
  color: var(--c-deep-blue);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 14px;
  box-shadow: 0 4px 16px rgba(10, 31, 68, 0.25);
  transform: translateY(-200%);
  transition: transform 0.2s ease;
}
.skip-link:focus {
  transform: translateY(0);
  color: var(--c-deep-blue);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--header-w);
  background: var(--c-deep-blue);
  color: var(--c-white);
  z-index: 100;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 4px 0 24px rgba(10, 31, 68, 0.16);
}
.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 24px 20px;
  flex-shrink: 0;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  color: var(--c-white);
  text-decoration: none;
}
.site-brand:hover { color: var(--c-white); }
.site-brand__mark {
  position: relative;
  width: 48px;
  height: 48px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--c-gold), var(--c-orange));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.site-brand__mark::after {
  content: "";
  position: absolute;
  inset: 3px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 12px;
  pointer-events: none;
}
.site-brand__glyph {
  font-family: var(--font-head);
  font-size: 24px;
  font-weight: 900;
  color: var(--c-deep-blue);
  line-height: 1;
}
.site-brand__copy {
  display: flex;
  flex-direction: column;
}
.site-brand__name {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: 0.08em;
}
.site-brand__sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--c-gray);
  margin-top: 3px;
}

.site-header__toggle {
  display: none;
  align-items: center;
  gap: 8px;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  color: var(--c-white);
}
.site-header__toggle-text {
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
}
.site-header__burger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 22px;
}
.site-header__burger-line {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--c-white);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.site-header__toggle[aria-expanded="true"] .site-header__burger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.site-header__toggle[aria-expanded="true"] .site-header__burger-line:nth-child(2) {
  opacity: 0;
}
.site-header__toggle[aria-expanded="true"] .site-header__burger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-drawer {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 16px 16px 24px;
  overflow-y: auto;
}
.site-drawer__watermark {
  position: absolute;
  right: -16px;
  bottom: -20px;
  font-family: var(--font-head);
  font-size: 180px;
  font-weight: 900;
  line-height: 1;
  color: rgba(255, 255, 255, 0.035);
  transform: rotate(-8deg);
  pointer-events: none;
  user-select: none;
}

.site-nav {
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}
.site-nav__list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.site-nav__link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 16px;
  border-radius: var(--radius-md);
  color: rgba(255, 255, 255, 0.78);
  text-decoration: none;
  transition: background 0.25s ease, color 0.25s ease;
  position: relative;
}
.site-nav__link:hover {
  background: rgba(212, 175, 55, 0.12);
  color: var(--c-gold);
}
.site-nav__link[aria-current="page"] {
  background: linear-gradient(90deg, rgba(212, 175, 55, 0.2), rgba(212, 175, 55, 0.04));
  color: var(--c-gold);
  box-shadow: inset 3px 0 0 var(--c-gold);
  margin-left: -16px;
  padding-left: 29px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}
.site-nav__link::after {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-orange);
  opacity: 0;
  margin-left: auto;
  flex-shrink: 0;
  transition: opacity 0.3s ease;
}
.site-nav__link.is-spied::after { opacity: 1; }
.site-nav__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-gray);
  width: 24px;
  flex-shrink: 0;
  letter-spacing: 0.04em;
}
.site-nav__link:hover .site-nav__idx,
.site-nav__link[aria-current="page"] .site-nav__idx {
  color: var(--c-gold);
}
.site-nav__label {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
}

.site-header__meta {
  position: relative;
  z-index: 1;
  margin-top: auto;
  padding: 20px 16px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.site-header__meta-rule {
  display: block;
  width: 32px;
  height: 2px;
  background: var(--c-gold);
  border-radius: 2px;
  margin-bottom: 8px;
}
.site-header__meta-line {
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.62);
  margin: 0;
}
.site-header__meta-icp {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.35);
  margin: 6px 0 0;
}

.site-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 120;
  pointer-events: none;
  background: transparent;
}
.site-progress__bar {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--c-gold), var(--c-orange));
  border-radius: 0 3px 3px 0;
}

.site-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 90;
  width: 48px;
  height: 48px;
  border: none;
  border-radius: 50%;
  background: var(--c-deep-blue);
  color: var(--c-gold);
  font-size: 22px;
  font-weight: 900;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(10, 31, 68, 0.32);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease, background 0.3s ease;
}
.site-top[data-visible] {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.site-top:hover {
  background: var(--c-gold);
  color: var(--c-deep-blue);
}

.site-main {
  margin-left: var(--header-w);
  min-height: 60vh;
}
#main-content {
  scroll-margin-top: 72px;
}

.site-footer {
  margin-left: var(--header-w);
  background: var(--c-deep-blue);
  color: rgba(255, 255, 255, 0.78);
  border-top: 3px solid var(--c-gold);
  padding: 64px 48px 28px;
}
.site-footer__inner {
  max-width: var(--content-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr 1.3fr 1fr;
  gap: 48px;
}
.site-footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.site-brand--footer .site-brand__mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
}
.site-brand--footer .site-brand__glyph {
  font-size: 21px;
}
.site-brand--footer .site-brand__name {
  font-size: 18px;
}
.site-footer__tagline {
  margin: 20px 0 10px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.72);
  max-width: 280px;
}
.site-footer__note {
  margin: 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
  max-width: 280px;
}
.site-footer__columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.site-footer__heading {
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin-bottom: 16px;
}
.site-footer__list li {
  margin-bottom: 9px;
}
.site-footer__list a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.2s ease;
}
.site-footer__list a:hover {
  color: var(--c-gold);
}
.site-footer__contact-line {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
}
.site-footer__contact-address {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.55);
}
.site-footer__bottom {
  max-width: var(--content-w);
  margin: 40px auto 0;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}
.site-footer__copyright,
.site-footer__icp,
.site-footer__slogan {
  margin: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 999px;
  border: none;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}
.btn--primary {
  background: var(--c-orange);
  color: var(--c-white);
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.3);
}
.btn--primary:hover {
  background: #e85a29;
  color: var(--c-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 107, 53, 0.4);
}
.btn--ghost {
  background: transparent;
  color: var(--c-deep-blue);
  border: 2px solid var(--c-deep-blue);
}
.btn--ghost:hover {
  background: var(--c-deep-blue);
  color: var(--c-white);
  transform: translateY(-2px);
}
.btn--gold {
  background: var(--c-gold);
  color: var(--c-deep-blue);
  box-shadow: 0 4px 16px rgba(212, 175, 55, 0.3);
}
.btn--gold:hover {
  background: #c4a032;
  color: var(--c-deep-blue);
  transform: translateY(-2px);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-gray);
  margin-bottom: 24px;
}
.breadcrumb a {
  color: var(--c-deep-blue);
  text-decoration: none;
}
.breadcrumb a:hover { color: var(--c-orange); }
.breadcrumb__sep {
  color: var(--c-gray);
  margin: 0 2px;
}

.container {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 0 48px;
}
.section {
  padding: var(--space-section) 0;
}

.page-head {
  padding: 72px 0 48px;
}
.page-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-orange);
  margin-bottom: 10px;
}
.page-title {
  font-family: var(--font-head);
  font-weight: 900;
}
.lead {
  font-size: 19px;
  line-height: 1.75;
  color: var(--c-gray);
  max-width: 720px;
}

.grid {
  display: grid;
  gap: 24px;
}
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  background: var(--c-purple);
  color: var(--c-white);
  line-height: 1.4;
}
.tag--gold {
  background: var(--c-gold);
  color: var(--c-deep-blue);
}
.tag--teal {
  background: var(--c-teal);
  color: var(--c-white);
}

.figure {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--c-white);
  aspect-ratio: 16 / 9;
}
.figure--wide { aspect-ratio: 21 / 9; }
.figure--portrait { aspect-ratio: 4 / 5; }
.figure__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--c-deep-blue) 0%, var(--c-purple) 100%);
  color: rgba(255, 255, 255, 0.75);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.1em;
  text-align: center;
  padding: 16px;
}
.figure__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.metric {
  font-family: var(--font-mono);
  font-size: 38px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--c-deep-blue);
  letter-spacing: -0.01em;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat {
  background: var(--c-white);
  border-radius: var(--radius-lg);
  padding: 24px;
  border-left: 4px solid var(--c-gold);
  box-shadow: 0 4px 20px rgba(10, 31, 68, 0.05);
}
.stat__number {
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--c-deep-blue);
}
.stat__label {
  font-size: 14px;
  color: var(--c-gray);
  margin-top: 4px;
}

body.no-scroll {
  overflow: hidden;
}
body.nav-open::after {
  content: "";
  position: fixed;
  inset: 64px 0 0 0;
  background: rgba(10, 31, 68, 0.45);
  z-index: 94;
}

@media (max-width: 1199px) {
  :root {
    --space-page: 64px;
    --space-section: 56px;
  }
  .container {
    padding: 0 32px;
  }
  .site-footer {
    padding: 48px 32px 24px;
  }
  .site-footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
  .site-footer__contact {
    grid-column: span 2;
  }
  .stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 899px) {
  :root {
    --space-page: 40px;
    --space-section: 40px;
  }

  .site-header {
    width: 100%;
    height: 64px;
    bottom: auto;
    flex-direction: row;
    align-items: center;
    padding: 0 16px;
    box-shadow: none;
  }
  .site-header__bar {
    flex: 1;
    height: 100%;
    padding: 0;
  }
  .site-header__toggle {
    display: inline-flex;
  }
  .site-brand__mark {
    width: 40px;
    height: 40px;
    border-radius: 12px;
  }
  .site-brand__glyph {
    font-size: 20px;
  }
  .site-brand__name {
    font-size: 18px;
  }
  .site-brand__sub {
    display: none;
  }

  .site-drawer {
    position: fixed;
    top: 64px;
    left: 0;
    bottom: 0;
    width: min(360px, 85vw);
    padding: 24px 24px 32px;
    transform: translateX(-100%);
    transition: transform 0.35s ease;
    z-index: 95;
    box-shadow: 4px 0 24px rgba(10, 31, 68, 0.3);
  }
  .site-drawer[data-open] {
    transform: translateX(0);
  }
  .site-nav__link[aria-current="page"] {
    margin-left: -24px;
    padding-left: 37px;
  }

  .site-progress {
    top: 0;
  }

  .site-main {
    margin-left: 0;
    padding-top: 64px;
    min-height: calc(100vh - 300px);
  }
  .site-footer {
    margin-left: 0;
    padding: 48px 20px 24px;
  }
  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .site-footer__contact {
    grid-column: span 1;
  }
  .site-footer__columns {
    gap: 24px;
  }
  .site-footer__bottom {
    flex-direction: column;
    text-align: center;
    gap: 8px;
  }
  .container {
    padding: 0 20px;
  }
  .page-head {
    padding: 48px 0 32px;
  }
  .grid--2,
  .grid--3 {
    grid-template-columns: 1fr;
  }
  .stats {
    grid-template-columns: 1fr;
  }
  .site-top {
    right: 16px;
    bottom: 16px;
  }
}

@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;
  }
  .site-top {
    transition: none;
  }
}