:root {
  --c-navy: #0A1F44;
  --c-navy-2: #1A3A6B;
  --c-gold: #D4AF37;
  --c-gold-soft: #F0C75E;
  --c-orange: #FF6B35;
  --c-orange-deep: #E55B2B;
  --c-ink: #F5F0E6;
  --c-cadet: #2C3E5A;
  --font-body: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  --font-display: Impact, "Arial Black", "Microsoft YaHei", Arial, sans-serif;
  --font-mono: "Courier New", ui-monospace, SFMono-Regular, monospace;
  --radius: 20px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--c-navy);
  color: var(--c-ink);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  padding-top: 72px;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.2;
  margin: 0;
}

p, ul, ol, dl, dd {
  margin: 0;
}

ul[class], ol[class] {
  list-style: none;
  padding: 0;
}

a {
  color: inherit;
}

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

button {
  font-family: inherit;
}

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

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 2000;
  padding: 12px 20px;
  background: var(--c-gold);
  color: var(--c-navy);
  font-weight: 700;
  text-decoration: none;
  border-radius: 10px;
  transform: translateY(-160%);
  transition: transform 0.2s ease;
}

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

.container-sm, .container-md, .container-lg, .container-xl {
  width: 100%;
  margin-inline: auto;
  padding-inline: 24px;
}

.container-sm { max-width: 780px; }
.container-md { max-width: 1080px; }
.container-lg { max-width: 1280px; }
.container-xl { max-width: 1440px; }

.section {
  padding-block: clamp(48px, 8vw, 96px);
}

.section--tight {
  padding-block: clamp(32px, 5vw, 64px);
}

.section--light {
  background: var(--c-ink);
  color: var(--c-navy);
}

.section-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}

.section-head__index {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--c-gold);
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid rgba(212, 175, 55, 0.35);
  padding: 4px 10px;
  border-radius: 6px;
  white-space: nowrap;
}

.section-head::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, rgba(212, 175, 55, 0.5), transparent);
}

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

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 12px;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.btn--primary {
  background: var(--c-orange);
  color: #fff;
  box-shadow: 0 6px 16px rgba(255, 107, 53, 0.25);
}

.btn--primary:hover {
  background: var(--c-orange-deep);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(229, 91, 43, 0.35);
}

.btn--primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 10px rgba(229, 91, 43, 0.3);
}

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

.btn--gold:hover {
  background: var(--c-gold-soft);
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  color: var(--c-ink);
  border-color: rgba(212, 175, 55, 0.6);
}

.btn--ghost:hover {
  border-color: var(--c-gold);
  color: var(--c-gold);
  transform: translateY(-2px);
}

.btn--sm {
  padding: 10px 16px;
  font-size: 0.9rem;
  border-radius: 10px;
}

.btn--lg {
  padding: 16px 28px;
  font-size: 1.125rem;
  border-radius: 14px;
}

.card-panel {
  background: linear-gradient(180deg, rgba(26, 58, 107, 0.6), rgba(10, 31, 68, 0.9));
  border: 1px solid rgba(212, 175, 55, 0.25);
  border-radius: var(--radius);
  padding: clamp(20px, 3vw, 36px);
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.card-panel:hover {
  border-color: var(--c-gold);
  transform: scale(1.02);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
}

.card-panel--angled {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), 0 100%);
}

.stat-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

.stat-block {
  background: rgba(26, 58, 107, 0.5);
  border: 1px solid rgba(212, 175, 55, 0.2);
  border-radius: 16px;
  padding: 16px 20px;
}

.stat-block__value {
  display: block;
  font-family: var(--font-display);
  font-size: 2.2rem;
  color: var(--c-gold);
  line-height: 1.1;
}

.stat-block__label {
  display: block;
  margin-top: 4px;
  font-size: 0.8rem;
  color: rgba(245, 240, 230, 0.7);
}

.label-mono {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-gold);
}

.prose {
  font-size: 1rem;
  line-height: 1.75;
}

.prose h1, .prose h2, .prose h3 {
  margin-bottom: 0.5em;
}

.prose p {
  margin-bottom: 1em;
}

.prose a {
  color: var(--c-gold);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.list-check {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.list-check li {
  padding-left: 32px;
  position: relative;
}

.list-check li::before {
  content: "+";
  position: absolute;
  left: 0;
  top: 0;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  background: rgba(212, 175, 55, 0.15);
  border: 1px solid rgba(212, 175, 55, 0.4);
  border-radius: 6px;
  color: var(--c-gold);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.topic-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  border-top: 1px solid rgba(212, 175, 55, 0.3);
  border-bottom: 1px solid rgba(212, 175, 55, 0.3);
  padding-block: 14px;
}

.topic-strip__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: rgba(245, 240, 230, 0.75);
  text-decoration: none;
}

.topic-strip__item::before {
  content: "+";
  color: var(--c-gold);
}

a.topic-strip__item:hover {
  color: var(--c-gold);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

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

.breadcrumbs li + li::before {
  content: "/";
  color: rgba(212, 175, 55, 0.5);
}

.breadcrumbs a {
  color: rgba(245, 240, 230, 0.7);
  text-decoration: none;
}

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

.breadcrumbs [aria-current="page"] {
  color: var(--c-gold);
}

.media-frame {
  position: relative;
  display: block;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.12), transparent 40%), var(--c-navy-2);
  border: 1px solid rgba(212, 175, 55, 0.2);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.media-frame--portrait {
  aspect-ratio: 4 / 5;
}

.media-frame--panorama {
  aspect-ratio: 21 / 9;
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(10, 31, 68, 0.4) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 31, 68, 0.4) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.35;
  z-index: 1;
  transition: opacity 0.2s ease;
  pointer-events: none;
}

.media-frame:hover {
  border-color: var(--c-gold);
  transform: scale(1.02);
}

.media-frame:hover::before {
  opacity: 0.8;
}

.media-frame img {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame::after {
  content: attr(data-index);
  position: absolute;
  z-index: 3;
  top: 10px;
  right: 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 2px 8px;
  background: rgba(10, 31, 68, 0.82);
  color: var(--c-gold);
  border: 1px solid rgba(212, 175, 55, 0.35);
  border-radius: 4px;
  pointer-events: none;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 31, 68, 0.72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(212, 175, 55, 0.35);
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.site-header.is-scrolled {
  background: rgba(10, 31, 68, 0.96);
  border-bottom-color: rgba(212, 175, 55, 0.7);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(212, 175, 55, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212, 175, 55, 0.05) 1px, transparent 1px);
  background-size: 28px 28px;
}

.site-header__inner {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: 24px;
  height: 72px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.site-header__progress {
  position: absolute;
  bottom: -1px;
  left: 0;
  height: 3px;
  width: 100%;
  transform-origin: 0 50%;
  transform: scaleX(0);
  background: linear-gradient(90deg, var(--c-gold), var(--c-orange));
  z-index: 2;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--c-ink);
  flex-shrink: 0;
}

.brand__mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--c-gold) 0%, var(--c-orange) 100%);
  color: var(--c-navy);
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 900;
  clip-path: polygon(0 0, 100% 0, 100% 80%, 0 100%);
  line-height: 1;
}

.brand__text {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  line-height: 1.2;
}

.brand__text span {
  color: var(--c-gold);
  font-size: 0.8em;
  margin-left: 4px;
}

.site-nav {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  display: none;
  padding: 16px 24px 24px;
  background: rgba(7, 16, 44, 0.98);
  border-top: 1px solid var(--c-gold);
  border-bottom: 1px solid rgba(212, 175, 55, 0.4);
}

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

.site-nav__list {
  display: flex;
  flex-direction: column;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__link {
  display: block;
  padding: 14px 2px;
  font-size: 1rem;
  color: rgba(245, 240, 230, 0.85);
  text-decoration: none;
  border-bottom: 1px solid rgba(245, 240, 230, 0.08);
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.site-nav__link::after {
  display: none;
}

.site-nav__link:hover {
  color: var(--c-gold);
}

.site-nav__link[aria-current="page"] {
  color: var(--c-gold);
  padding-left: 12px;
  border-left: 3px solid var(--c-gold);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.header-actions__cta {
  white-space: nowrap;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid rgba(212, 175, 55, 0.5);
  border-radius: 10px;
  cursor: pointer;
  color: var(--c-gold);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 6px;
}

.nav-toggle__line {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle__label {
  display: block;
  font-size: 0.625rem;
  line-height: 1;
}

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

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

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

.site-footer {
  position: relative;
  margin-top: clamp(60px, 10vw, 120px);
  background:
    radial-gradient(circle at 85% 10%, rgba(212, 175, 55, 0.12), transparent 24rem),
    linear-gradient(180deg, #0A1F44 0%, #050D20 100%);
  border-top: 2px solid rgba(212, 175, 55, 0.55);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(212, 175, 55, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212, 175, 55, 0.045) 1px, transparent 1px);
  background-size: 40px 40px;
}

.site-footer__inner {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin-inline: auto;
  padding: 64px 24px 0;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.4fr 1fr;
  gap: clamp(24px, 4vw, 64px);
  padding-bottom: 48px;
}

.footer-col--brand {
  padding-right: 12px;
}

.footer-col--links {
  min-width: 0;
}

.footer-col--support {
  min-width: 0;
}

.footer-col--policy {
  min-width: 0;
}

.brand--footer .brand__mark {
  width: 38px;
  height: 38px;
  font-size: 1.2rem;
}

.brand--footer .brand__text {
  font-size: 0.95rem;
}

.footer-brand__slogan {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--c-ink);
  margin: 8px 0 4px;
}

.footer-brand__desc {
  font-size: 0.9rem;
  color: rgba(245, 240, 230, 0.62);
  line-height: 1.7;
  max-width: 36em;
}

.footer-meta {
  margin: 24px 0 0;
  display: grid;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.footer-meta div {
  display: flex;
  gap: 10px;
}

.footer-meta dt {
  color: var(--c-gold);
  width: 48px;
}

.footer-meta dd {
  color: rgba(245, 240, 230, 0.7);
}

.footer-col__head {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin: 0 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(212, 175, 55, 0.25);
}

.page-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: rgba(245, 240, 230, 0.78);
  text-decoration: none;
  font-size: 0.92rem;
  position: relative;
}

.page-links a::before {
  content: "/";
  font-family: var(--font-mono);
  color: var(--c-gold);
  font-size: 0.8rem;
}

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

.page-links--policy {
  gap: 12px;
  margin-top: 4px;
}

.footer-contact-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
  font-size: 0.9rem;
}

.footer-contact-list li {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 10px;
}

.footer-contact-list__label {
  color: var(--c-gold);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  align-self: end;
}

.footer-records {
  border: 1px solid rgba(212, 175, 55, 0.25);
  border-radius: 12px;
  background: rgba(10, 31, 68, 0.35);
  padding: 4px 12px;
  margin-top: 8px;
}

.footer-records__summary {
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--c-gold);
  cursor: pointer;
}

.footer-records__summary::-webkit-details-marker {
  display: none;
}

.footer-records__arrow {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 1px solid rgba(212, 175, 55, 0.5);
  border-radius: 50%;
  text-align: center;
  line-height: 17px;
  font-family: var(--font-mono);
  transition: transform 0.2s ease;
}

.footer-records[open] .footer-records__arrow {
  transform: rotate(45deg);
}

.footer-records__list {
  list-style: none;
  margin: 0;
  padding: 10px 0 4px;
  display: grid;
  gap: 2px 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  max-height: 260px;
  overflow-y: auto;
  overscroll-behavior: contain;
  border-top: 1px dashed rgba(212, 175, 55, 0.2);
}

.record-item {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: rgba(245, 240, 230, 0.68);
  padding: 6px 8px;
  border-radius: 6px;
  background: rgba(245, 240, 230, 0.03);
}

.record-item__id {
  color: var(--c-gold);
}

.record-item__cat {
  text-align: right;
  color: rgba(245, 240, 230, 0.75);
}

.footer-policy__note {
  font-size: 0.78rem;
  line-height: 1.7;
  color: rgba(245, 240, 230, 0.5);
  border-left: 2px solid rgba(212, 175, 55, 0.4);
  padding-left: 12px;
  margin-top: 18px;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  padding: 22px 0 28px;
  border-top: 1px solid rgba(212, 175, 55, 0.22);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: rgba(245, 240, 230, 0.5);
}

@media (min-width: 768px) {
  body {
    padding-top: 72px;
  }

  .site-nav {
    position: static;
    display: block;
    flex: 1;
    min-width: 0;
    padding: 0;
    background: transparent;
    border: 0;
  }

  .site-nav__list {
    display: flex;
    flex-direction: row;
    justify-content: flex-end;
    gap: clamp(14px, 2.2vw, 28px);
  }

  .site-nav__link {
    display: inline-block;
    padding: 8px 2px;
    font-size: 0.95rem;
    border-bottom: 0;
    color: rgba(245, 240, 230, 0.82);
  }

  .site-nav__link::after {
    display: block;
    content: "";
    position: absolute;
    left: 50%;
    right: 50%;
    bottom: 2px;
    height: 3px;
    background: var(--c-gold);
    transition: left 0.2s ease, right 0.2s ease;
  }

  .site-nav__link:hover::after,
  .site-nav__link:focus-visible::after,
  .site-nav__link[aria-current="page"]::after {
    left: 0;
    right: 0;
  }

  .site-nav__link:hover {
    color: var(--c-ink);
  }

  .site-nav__link[aria-current="page"] {
    color: var(--c-gold);
    padding-left: 2px;
    border-left: 0;
  }

  .nav-toggle {
    display: none;
  }
}

@media (max-width: 1023.98px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }

  .grid--3,
  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 767.98px) {
  body {
    padding-top: 64px;
  }

  .site-header__inner {
    height: 64px;
    gap: 10px;
    padding-inline: 16px;
  }

  .brand__text {
    font-size: 0.9rem;
  }

  .brand__mark {
    width: 36px;
    height: 36px;
    font-size: 1.2rem;
  }

  .header-actions__cta {
    padding: 9px 12px;
    font-size: 0.8rem;
  }

  .site-footer__inner {
    padding: 40px 16px 0;
  }
}

@media (max-width: 639.98px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
  }

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

  .footer-legal {
    flex-direction: column;
    gap: 8px;
  }
}

@media (max-width: 399.98px) {
  .footer-records__list {
    grid-template-columns: 1fr;
  }

  .footer-contact-list li {
    grid-template-columns: 60px 1fr;
  }
}

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

  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}