:root {
  --color-bg: #0B1B2B;
  --color-panel: #102C3E;
  --color-section: #0F2438;
  --color-yellow: #FFC400;
  --color-orange: #FF6B00;
  --color-cyan: #00D4FF;
  --color-text: #F5F7FA;
  --color-text-secondary: #A8B8C8;
  --color-text-muted: #6B7A8A;
  --color-border: #1D3A4F;
  --color-header-bg: rgba(11, 27, 43, 0.92);
  --font-headline: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Inter", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Roboto Mono", "SFMono-Regular", "Consolas", "Courier New", monospace;
  --header-height: 72px;
  --nav-width: 320px;
  --container-max: 1200px;
  --container-pad: 24px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-card: 0 12px 30px rgba(0, 0, 0, 0.35);
  --shadow-pop: 0 20px 50px rgba(0, 0, 0, 0.45);
  --grid-gap: 24px;
}

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

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

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}

ul,
ol {
  list-style: none;
}

a {
  color: var(--color-cyan);
  text-decoration: none;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

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

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

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 9999;
  background: var(--color-yellow);
  color: #0B1B2B;
  font-weight: 700;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 12px;
  color: #0B1B2B;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--color-header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
  transition: box-shadow 0.3s ease;
}

.site-header.scrolled {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(var(--container-max), 100% - var(--container-pad) * 2);
  margin-inline: auto;
  height: 100%;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--color-yellow);
  color: #0B1B2B;
  font-family: var(--font-headline);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -0.5px;
  border-radius: var(--radius-sm);
  transform: skew(-6deg);
  box-shadow: 4px 4px 0 rgba(255, 107, 0, 0.5);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

.brand-tagline {
  font-size: 11px;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-family: var(--font-mono);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  border-radius: 999px;
  border: 2px solid transparent;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
  text-decoration: none;
  white-space: nowrap;
}

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

.btn-primary {
  background: var(--color-yellow);
  color: #0B1B2B;
  border-color: var(--color-yellow);
}

.btn-primary:hover {
  background: #FFD633;
  color: #0B1B2B;
}

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

.btn-outline:hover {
  border-color: var(--color-yellow);
  background: rgba(255, 196, 0, 0.08);
  color: var(--color-yellow);
}

.btn-help {
  background: rgba(255, 196, 0, 0.1);
  border-color: var(--color-yellow);
  color: var(--color-yellow);
  font-size: 13px;
  padding: 8px 18px;
}

.btn-help:hover {
  background: var(--color-yellow);
  color: #0B1B2B;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text);
  padding: 6px 8px;
}

.nav-toggle-icon,
.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  position: static;
}

.nav-toggle-icon::before {
  transform: translateY(-6px);
}

.nav-toggle-icon::after {
  transform: translateY(4px);
}

.nav-toggle-label {
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

.site-nav[data-open] .nav-toggle-icon {
  background: transparent;
}

.site-nav[data-open] .nav-toggle-icon::before {
  transform: rotate(45deg) translateY(0);
}

.site-nav[data-open] .nav-toggle-icon::after {
  transform: rotate(-45deg) translateY(0);
}

.site-nav {
  position: fixed;
  top: var(--header-height);
  right: 0;
  bottom: 0;
  width: min(var(--nav-width), 86vw);
  background: var(--color-panel);
  border-left: 1px solid var(--color-border);
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  z-index: 90;
  padding: 28px 24px;
}

.site-nav[data-open] {
  transform: translateX(0);
  box-shadow: -20px 0 50px rgba(0, 0, 0, 0.5);
}

.nav-inner {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  gap: 32px;
}

.nav-index {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 14px;
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-link {
  display: block;
  font-size: 32px;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--color-text);
  padding: 8px 4px;
  border-left: 3px solid transparent;
  font-family: var(--font-headline);
  line-height: 1.2;
  transition: color 0.2s, border-color 0.2s, transform 0.2s;
}

.nav-link:hover {
  color: var(--color-yellow);
  border-left-color: var(--color-yellow);
  transform: translateX(4px);
}

.nav-link[aria-current="page"] {
  color: var(--color-yellow);
  border-left-color: var(--color-yellow);
}

.nav-footer {
  margin-top: auto;
  border-top: 1px solid var(--color-border);
  padding-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.nav-status {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-cyan);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-status::before {
  content: "● ";
  color: var(--color-cyan);
  font-size: 10px;
}

.nav-contact {
  font-size: 13px;
  color: var(--color-text-secondary);
}

.nav-contact:hover {
  color: var(--color-orange);
}

@media (min-width: 769px) {
  .site-header {
    height: auto;
  }

  .header-inner {
    min-height: 72px;
  }

  .site-nav {
    position: static;
    width: auto;
    height: auto;
    background: transparent;
    border-left: none;
    border-bottom: 1px solid var(--color-border);
    transform: none;
    padding: 0;
    overflow: visible;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: none;
  }

  .site-nav[data-open] {
    box-shadow: none;
  }

  .nav-inner {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    min-height: 44px;
    width: min(var(--container-max), 100% - var(--container-pad) * 2);
    margin-inline: auto;
  }

  .nav-index,
  .nav-footer {
    display: none;
  }

  .nav-list {
    display: flex;
    flex-direction: row;
    gap: 2px;
  }

  .nav-item {
    position: relative;
  }

  .nav-link {
    font-size: 14px;
    font-weight: 600;
    padding: 6px 14px;
    border-left: none;
    border-bottom: 2px solid transparent;
    border-radius: 4px;
    font-family: var(--font-body);
  }

  .nav-link:hover {
    border-left: none;
    transform: none;
    border-bottom-color: var(--color-yellow);
  }

  .nav-link[aria-current="page"] {
    border-left: none;
    border-bottom: 2px solid var(--color-yellow);
    color: var(--color-yellow);
  }

  .nav-toggle {
    display: none;
  }
}

.site-footer {
  position: relative;
  z-index: 10;
  background: var(--color-panel);
  border-top: 2px solid var(--color-yellow);
  padding: 48px 0 28px;
  margin-top: 0;
}

.footer-rule {
  position: absolute;
  top: 12px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-yellow) 0%, var(--color-orange) 35%, var(--color-cyan) 70%, transparent 100%);
  opacity: 0.4;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.footer-brand-name {
  font-size: 28px;
  font-weight: 900;
  letter-spacing: 0.02em;
  font-family: var(--font-headline);
  color: var(--color-text);
}

.footer-brand-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-cyan);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 8px;
}

.footer-trust {
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-top: 14px;
}

.footer-title {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-yellow);
  font-family: var(--font-mono);
  margin-bottom: 14px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 8px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: var(--color-text);
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color 0.2s, padding-left 0.2s;
}

.footer-links a::before {
  content: "›";
  color: var(--color-orange);
  font-style: normal;
  font-weight: 700;
  transition: transform 0.2s;
}

.footer-links a:hover {
  color: var(--color-yellow);
  padding-left: 4px;
}

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

.footer-contact {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  margin-top: 32px;
}

.contact-list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  padding: 18px 0;
}

.contact-item dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.contact-item dd {
  font-size: 14px;
  color: var(--color-text);
  word-break: break-all;
}

.contact-item a {
  color: var(--color-text);
}

.contact-item a:hover {
  color: var(--color-cyan);
}

.footer-bottom {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 24px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-muted);
}

.copyright,
.icp {
  font-size: 12px;
  letter-spacing: 0.03em;
}

.icp::after {
  content: " · 数据翻页快过翻日历";
  color: var(--color-text-muted);
}

@media (max-width: 768px) {
  :root {
    --container-pad: 20px;
  }

  .site-header {
    height: 60px;
  }

  .header-inner {
    min-height: 60px;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }

  .brand-name {
    font-size: 16px;
  }

  .brand-tagline {
    display: none;
  }

  .btn-help {
    padding: 7px 14px;
    font-size: 12px;
  }

  .nav-toggle {
    display: inline-flex;
  }

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

  .contact-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

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

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .contact-list {
    grid-template-columns: 1fr;
  }

  .brand-tagline {
    display: none;
  }

  .btn-help {
    display: none;
  }
}

.progress-track {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 100%;
  z-index: 998;
  background: rgba(255, 255, 255, 0.08);
  pointer-events: none;
}

.progress-track::after {
  content: "";
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-yellow), var(--color-orange));
  transition: width 0.15s ease-out;
}

[data-scroll-progress] .progress-track::after {
  width: var(--progress, 0%);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--grid-gap);
}

.section {
  background: var(--color-section);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin: 24px 0;
  position: relative;
}

.section::before {
  content: "";
  position: absolute;
  top: 8px;
  left: -4px;
  bottom: 8px;
  width: 3px;
  background: var(--color-yellow);
  opacity: 0.6;
}

.data-card {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.data-card::after {
  content: "//";
  position: absolute;
  top: 8px;
  right: 12px;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  opacity: 0.5;
  font-size: 14px;
}

.card-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-cyan);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.card-value {
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  color: var(--color-yellow);
  line-height: 1;
}

.card-unit {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-text-muted);
  margin-left: 4px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  background: transparent;
}

.tag-yellow {
  background: rgba(255, 196, 0, 0.14);
  border-color: rgba(255, 196, 0, 0.4);
  color: var(--color-yellow);
}

.tag-cyan {
  background: rgba(0, 212, 255, 0.1);
  border-color: rgba(0, 212, 255, 0.35);
  color: var(--color-cyan);
}

.tag-orange {
  background: rgba(255, 107, 0, 0.12);
  border-color: rgba(255, 107, 0, 0.4);
  color: var(--color-orange);
}

.diagonal-scan {
  position: relative;
  overflow: hidden;
}

.diagonal-scan::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 120%;
  height: 4px;
  background: linear-gradient(90deg, transparent, var(--color-orange), var(--color-yellow), transparent);
  transform: translateX(-110%) rotate(2deg);
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
}

.diagonal-scan[data-visible="true"]::before {
  animation: scan-line 0.6s ease forwards;
}

@keyframes scan-line {
  0% {
    transform: translateX(-110%) rotate(2deg);
    opacity: 1;
  }
  100% {
    transform: translateX(110%) rotate(2deg);
    opacity: 0.6;
  }
}

.diagonal-band {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: repeating-linear-gradient(
    -35deg,
    transparent 0,
    transparent 18px,
    rgba(255, 255, 255, 0.014) 18px,
    rgba(255, 255, 255, 0.014) 19px
  );
  pointer-events: none;
}

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

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