:root {
  --color-ink: #0B1F1A;
  --color-panel: #0F2A22;
  --color-line: #1E3A2E;
  --color-gold: #D4AF37;
  --color-gold-soft: #E8C95E;
  --color-orange: #FF7A00;
  --color-aqua: #00E5CC;
  --color-text: #F2F5F0;
  --color-muted: #B8C4BC;
  --font-head: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-body: "Noto Serif SC", "Source Han Serif SC", "Songti SC", STSong, serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Roboto Mono", Consolas, monospace;
  --header-h: 60px;
  --max-w: 1200px;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow-panel: 0 18px 50px rgba(0, 0, 0, 0.28);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scrollbar-color: var(--color-line) var(--color-ink);
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  background:
    radial-gradient(1100px 520px at 88% -10%, rgba(0, 229, 204, 0.07), transparent 60%),
    radial-gradient(820px 420px at -8% 28%, rgba(212, 175, 55, 0.05), transparent 60%),
    var(--color-ink);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  padding-top: calc(var(--header-h) + 40px);
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.5em;
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--color-text);
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.1rem, 4vw, 3.75rem);
}

h2 {
  font-size: clamp(1.75rem, 3vw, 2.75rem);
}

h3 {
  font-size: 1.35rem;
}

h4 {
  font-size: 1.125rem;
}

p {
  margin: 0 0 1em;
}

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

strong {
  color: var(--color-text);
}

::selection {
  background: rgba(212, 175, 55, 0.32);
  color: var(--color-text);
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: -120px;
  left: 24px;
  z-index: 2000;
  padding: 12px 22px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-soft));
  color: var(--color-ink);
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 0.90625rem;
  text-decoration: none;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
  transition: top 0.25s ease;
}

.skip-link:focus-visible {
  top: 18px;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  z-index: 3000;
  background: linear-gradient(90deg, var(--color-gold), var(--color-orange), var(--color-aqua));
  box-shadow: 0 0 12px rgba(212, 175, 55, 0.5);
  pointer-events: none;
}

.site-header {
  position: fixed;
  top: 10px;
  left: 0;
  right: 0;
  width: min(calc(100% - 20px), 1240px);
  margin-inline: auto;
  z-index: 1000;
  border: 1px solid rgba(212, 175, 55, 0.26);
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(15, 42, 34, 0.97), rgba(11, 31, 26, 0.98));
  box-shadow: 0 10px 34px rgba(0, 0, 0, 0.38);
  transition: border-color 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.site-header.is-scrolled {
  border-color: rgba(212, 175, 55, 0.5);
  background: linear-gradient(180deg, rgba(7, 20, 16, 0.97), rgba(9, 25, 20, 0.98));
  box-shadow: 0 14px 44px rgba(0, 0, 0, 0.5);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 10px;
  height: var(--header-h);
  padding: 0 10px 0 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
  text-decoration: none;
}

.brand-logo {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1rem;
  line-height: 1;
  padding: 8px 9px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-soft));
  color: var(--color-ink);
  letter-spacing: 0.08em;
}

.brand-text {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.0625rem;
  letter-spacing: 0.05em;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  padding: 8px 16px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--color-orange), #E86A00);
  color: var(--color-ink);
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 0.875rem;
  line-height: 1;
  text-decoration: none;
  box-shadow: 0 6px 20px rgba(255, 122, 0, 0.2);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.header-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(255, 122, 0, 0.45);
}

.header-cta-code {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.75rem;
  background: rgba(11, 31, 26, 0.9);
  color: var(--color-gold);
  padding: 4px 7px;
  border-radius: 7px;
  letter-spacing: 0.04em;
}

.header-cta-label {
  white-space: nowrap;
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 8px;
  border-radius: 50%;
  background: rgba(30, 58, 46, 0.85);
  border: 1px solid var(--color-line);
  color: var(--color-text);
  cursor: pointer;
  transition: border-color 0.25s ease, background 0.25s ease;
}

.nav-toggle:hover {
  border-color: rgba(212, 175, 55, 0.5);
  background: rgba(30, 58, 46, 1);
}

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

.main-nav {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(320px, 86vw);
  margin: 0;
  padding: calc(var(--header-h) + 36px) 24px 32px;
  background: rgba(11, 31, 26, 0.98);
  border-left: 1px solid var(--color-line);
  box-shadow: -24px 0 60px rgba(0, 0, 0, 0.5);
  transform: translateX(100%);
  visibility: hidden;
  transition: transform 0.32s ease, visibility 0.32s ease;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  z-index: 1001;
}

.main-nav[data-open] {
  transform: translateX(0);
  visibility: visible;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nav-link {
  display: block;
  padding: 12px 16px;
  border-radius: 14px;
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-muted);
  text-decoration: none;
  transition: color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.nav-link:hover {
  color: var(--color-text);
  background: rgba(30, 58, 46, 0.7);
}

.nav-link[aria-current="page"] {
  color: var(--color-ink);
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-soft));
  font-weight: 800;
  box-shadow: 0 4px 18px rgba(212, 175, 55, 0.28);
}

.drawer-note {
  display: block;
  margin: 26px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--color-line);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-muted);
}

body.nav-open {
  overflow: hidden;
}

@media (min-width: 1080px) {
  :root {
    --header-h: 64px;
  }

  .site-header {
    top: 14px;
    width: min(calc(100% - 32px), 1240px);
  }

  .nav-toggle {
    display: none;
  }

  .main-nav {
    position: absolute;
    top: 50%;
    left: 50%;
    right: auto;
    bottom: auto;
    transform: translate(-50%, -50%);
    width: auto;
    padding: 0;
    background: none;
    border: 0;
    box-shadow: none;
    visibility: visible;
    overflow: visible;
    transition: none;
  }

  .nav-list {
    flex-direction: row;
    align-items: center;
    gap: 2px;
  }

  .nav-link {
    padding: 8px 12px;
    border-radius: 999px;
    font-size: 0.90625rem;
  }

  .drawer-note {
    display: none;
  }
}

@media (max-width: 480px) {
  .header-inner {
    gap: 8px;
    padding-left: 12px;
    padding-right: 8px;
  }

  .brand-text {
    font-size: 0.9375rem;
  }

  .brand-logo {
    font-size: 0.875rem;
    padding: 7px 8px;
  }

  .header-cta-label {
    display: none;
  }

  .header-cta {
    padding: 8px 12px;
  }

  .nav-toggle {
    width: 38px;
    height: 38px;
  }
}

.page-shell {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px 80px;
}

#main-content {
  outline: none;
  scroll-margin-top: 96px;
}

.section-block {
  padding: 56px 0;
  position: relative;
}

.section-block + .section-block {
  margin-top: 8px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gold);
}

.section-label::before {
  content: "";
  width: 30px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}

.section-title {
  margin: 12px 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
}

.section-desc {
  margin: 0 0 28px;
  color: var(--color-muted);
  max-width: 62ch;
}

.breadcrumbs {
  margin-bottom: 24px;
}

.breadcrumbs-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.breadcrumbs-list li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-muted);
}

.breadcrumbs-list li + li::before {
  content: "/";
  color: var(--color-gold);
}

.breadcrumb-link {
  color: var(--color-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.breadcrumb-current {
  color: var(--color-text);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.90625rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, color 0.25s ease;
}

.btn-gold {
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-soft));
  color: var(--color-ink);
  font-weight: 800;
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(212, 175, 55, 0.4);
}

.btn-ghost {
  background: rgba(212, 175, 55, 0.06);
  border-color: rgba(212, 175, 55, 0.45);
  color: var(--color-gold);
}

.btn-ghost:hover {
  background: rgba(212, 175, 55, 0.14);
  box-shadow: 0 0 22px rgba(212, 175, 55, 0.2);
}

.btn-aqua {
  background: rgba(0, 229, 204, 0.08);
  border-color: rgba(0, 229, 204, 0.4);
  color: var(--color-aqua);
}

.btn-aqua:hover {
  background: rgba(0, 229, 204, 0.16);
  box-shadow: 0 0 22px rgba(0, 229, 204, 0.25);
}

.panel-card {
  position: relative;
  overflow: hidden;
  padding: 26px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(15, 42, 34, 0.9), rgba(11, 31, 26, 0.96));
  box-shadow: var(--shadow-panel);
}

.panel-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(212, 175, 55, 0.08), transparent 42%);
  pointer-events: none;
}

.panel-title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1rem;
  color: var(--color-gold);
  letter-spacing: 0.02em;
}

.panel-meta {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-muted);
}

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

.data-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  padding: 11px 0;
  border-bottom: 1px solid rgba(30, 58, 46, 0.8);
}

.data-row:last-child {
  border-bottom: 0;
}

.data-key {
  color: var(--color-muted);
  font-size: 0.9375rem;
}

.data-val {
  font-family: var(--font-mono);
  font-size: 1.0625rem;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}

.data-val--gold {
  color: var(--color-gold);
  font-weight: 700;
}

.tag-pill {
  display: inline-block;
  padding: 6px 13px;
  border-radius: 999px;
  border: 1px solid rgba(212, 175, 55, 0.32);
  background: rgba(212, 175, 55, 0.1);
  color: var(--color-gold);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
}

.mono-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

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

.img-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-line);
  background: linear-gradient(135deg, rgba(30, 58, 46, 0.75), rgba(15, 42, 34, 0.35));
}

.img-frame::after {
  content: attr(data-placeholder);
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: rgba(184, 196, 188, 0.65);
  text-align: center;
}

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

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: 26px;
}

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

@media (min-width: 620px) {
  .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: 980px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

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

.divider-gold {
  border: 0;
  height: 3px;
  margin: 40px 0;
  background: linear-gradient(90deg, var(--color-gold), rgba(212, 175, 55, 0.12) 70%, transparent);
}

.skew-strip {
  height: 14px;
  margin: 0;
  border: 0;
  background: linear-gradient(90deg, var(--color-gold), var(--color-orange));
  clip-path: polygon(0 0, 100% 0, calc(100% - 48px) 100%, 48px 100%);
  opacity: 0.85;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

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

.back-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 900;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  padding: 0;
  border: 1px solid rgba(212, 175, 55, 0.5);
  border-radius: 50%;
  background: rgba(11, 31, 26, 0.92);
  color: var(--color-gold);
  font-family: var(--font-mono);
  font-size: 1.125rem;
  cursor: pointer;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease, background 0.25s ease, color 0.25s ease;
}

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

.back-top:hover {
  background: var(--color-gold);
  color: var(--color-ink);
  box-shadow: 0 0 26px rgba(212, 175, 55, 0.4);
}

.site-footer {
  position: relative;
  margin-top: 72px;
  background: linear-gradient(180deg, var(--color-ink), #060F0C 70%);
  border-top: 1px solid var(--color-line);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.7) 30%, rgba(0, 229, 204, 0.5) 70%, transparent);
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 52px 24px 36px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

@media (min-width: 620px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 960px) {
  .footer-inner {
    grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
    gap: 40px;
  }
}

.footer-col {
  display: grid;
  align-content: start;
  gap: 12px;
  min-width: 0;
}

.footer-col-brand {
  gap: 14px;
}

.footer-col-contact {
  gap: 10px;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--color-text);
}

.footer-trust {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.8;
  max-width: 34ch;
}

.footer-heading {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 0.8125rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
}

.footer-link-list,
.footer-contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  font-size: 0.9375rem;
}

.footer-link-list a {
  color: var(--color-muted);
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

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

.footer-contact-list {
  color: var(--color-muted);
}

.footer-contact-list li {
  line-height: 1.65;
}

.footer-bottom {
  border-top: 1px solid var(--color-line);
  padding: 18px 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 22px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-muted);
  text-align: center;
}

@media (max-width: 600px) {
  .page-shell {
    padding-left: 16px;
    padding-right: 16px;
  }

  .section-block {
    padding: 36px 0;
  }

  .panel-card {
    padding: 20px;
  }
}

@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;
  }

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