:root {
  --color-primary: #FF6B35;
  --color-secondary: #F9A825;
  --color-accent: #2E5BFF;
  --color-background: #0B1A30;
  --color-background-dark: #0F1A2E;
  --color-text: #FFFFFF;
  --color-text-muted: #C0C0C0;
  --color-border: #1A2A44;
  --gradient-primary: linear-gradient(135deg, #FF6B35, #F9A825);
  --gradient-nav-highlight: linear-gradient(90deg, #FF6B35, #F9A825);
  --gradient-border: linear-gradient(90deg, transparent, #2E5BFF, transparent);
}
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  font-size: 16px;
}
body {
  font-family: 'PingFang SC', 'Microsoft YaHei UI', sans-serif;
  font-weight: 400;
  line-height: 1.6;
  color: #FFFFFF;
  background: #0B1A30;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
:focus-visible {
  outline: 2px solid #FF6B35;
  outline-offset: 2px;
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html {
    scroll-behavior: auto;
  }
}
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  z-index: 10000;
  padding: 8px 16px;
  background: #FF6B35;
  color: #FFFFFF;
  font-weight: 700;
  text-decoration: none;
  border-radius: 0 0 4px 0;
  transition: top 0.2s;
}
.skip-link:focus {
  top: 0;
}
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 9999;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, #FF6B35, #F9A825);
  transition: width 0.15s ease-out;
  will-change: width;
  pointer-events: none;
}
@media (prefers-reduced-motion: reduce) {
  .progress-bar {
    transition: none;
  }
}
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 9000;
  width: 280px;
  height: 100vh;
  background: #0F1A2E;
  border-right: 1px solid #2E5BFF;
  box-shadow: 4px 0 20px rgba(46, 91, 255, 0.15);
  overflow-y: auto;
  overflow-x: hidden;
}
.header-topbar {
  display: none;
}
.sidebar {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 32px 24px;
}
.sidebar-brand {
  margin-bottom: 48px;
  text-align: center;
}
.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: #FFFFFF;
  transition: opacity 0.2s;
}
.brand-link:hover {
  opacity: 0.85;
}
.brand-icon {
  font-size: 28px;
  color: #F9A825;
  text-shadow: 0 0 10px rgba(249, 168, 37, 0.4);
  line-height: 1;
}
.brand-name {
  font-family: Impact, 'Arial Black', sans-serif;
  font-weight: 900;
  font-size: 20px;
  letter-spacing: 1px;
  color: #FFFFFF;
  text-shadow: 0 0 8px rgba(46, 91, 255, 0.3);
}
.sidebar-nav {
  flex: 1;
  margin-bottom: 32px;
}
.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.nav-item {
  margin: 0;
}
.nav-link {
  display: block;
  padding: 12px 16px;
  font-family: Impact, 'Arial Black', sans-serif;
  font-weight: 900;
  font-size: 18px;
  letter-spacing: 0.5px;
  color: #C0C0C0;
  text-decoration: none;
  border-radius: 4px;
  border-left: 3px solid transparent;
  transition: all 0.2s ease;
  position: relative;
}
.nav-link:hover {
  color: #FFFFFF;
  background: #1A2A44;
  border-left-color: #2E5BFF;
  padding-left: 20px;
}
.nav-link[aria-current="page"] {
  color: #FFFFFF;
  background: rgba(255, 107, 53, 0.12);
  border-left-color: #FF6B35;
  box-shadow: 0 0 12px rgba(255, 107, 53, 0.08);
}
.nav-link[aria-current="page"]::after {
  content: '';
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background: #F9A825;
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(249, 168, 37, 0.6);
}
.sidebar-cta {
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px solid #1A2A44;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-family: Impact, 'Arial Black', sans-serif;
  font-weight: 900;
  font-size: 16px;
  letter-spacing: 1px;
  text-decoration: none;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}
.btn-primary {
  width: 100%;
  background: linear-gradient(135deg, #FF6B35, #F9A825);
  color: #0B1A30;
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(255, 107, 53, 0.5);
}
.btn-primary:active {
  transform: translateY(0);
}
.sidebar-decor {
  height: 2px;
  margin-top: 16px;
  background: linear-gradient(90deg, transparent, #2E5BFF, transparent);
  opacity: 0.3;
}
.nav-toggle {
  display: none;
}
@media (max-width: 1023px) {
  .site-header {
    width: 100%;
    height: auto;
    position: fixed;
    top: 0;
    left: 0;
    background: #0F1A2E;
    border-right: none;
    border-bottom: 1px solid #2E5BFF;
    box-shadow: 0 2px 16px rgba(46, 91, 255, 0.12);
    overflow: visible;
  }
  .header-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    background: #0F1A2E;
    position: relative;
    z-index: 2;
  }
  .header-topbar .brand-link {
    gap: 8px;
  }
  .header-topbar .brand-icon {
    font-size: 24px;
  }
  .header-topbar .brand-name {
    font-size: 17px;
  }
  .nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
    transition: background 0.2s;
  }
  .nav-toggle:hover {
    background: #1A2A44;
  }
  .nav-toggle-bar {
    display: block;
    width: 24px;
    height: 2px;
    background: #FFFFFF;
    border-radius: 1px;
    transition: all 0.25s ease;
  }
  .nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
  }
  .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: rotate(-45deg) translate(4px, -4px);
  }
  .sidebar {
    position: fixed;
    top: 0;
    left: -100%;
    z-index: 9998;
    width: 280px;
    height: 100vh;
    background: #0F1A2E;
    border-right: 1px solid #2E5BFF;
    box-shadow: 4px 0 30px rgba(0, 0, 0, 0.6);
    padding: 24px 20px;
    transition: left 0.3s ease;
    overflow-y: auto;
  }
  .site-header[data-open="true"] .sidebar {
    left: 0;
  }
  .site-header[data-open="true"]::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    z-index: 9997;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(2px);
  }
  .sidebar-brand {
    display: block;
    margin-bottom: 32px;
    text-align: left;
  }
  .sidebar-brand .brand-link {
    gap: 10px;
  }
  .sidebar-brand .brand-icon {
    font-size: 26px;
  }
  .sidebar-brand .brand-name {
    font-size: 18px;
  }
}
.site-footer {
  background: #0F1A2E;
  border-top: 1px solid #1A2A44;
  padding: 48px 24px 24px;
  position: relative;
}
.site-footer::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, #2E5BFF, transparent);
  opacity: 0.25;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr 1.2fr;
  gap: 40px 32px;
}
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-brand .brand-link {
  gap: 8px;
}
.footer-brand .brand-icon {
  font-size: 24px;
}
.footer-brand .brand-name {
  font-size: 18px;
}
.footer-tagline {
  font-size: 14px;
  color: #C0C0C0;
  letter-spacing: 2px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links-title,
.footer-contact-title {
  font-family: Impact, 'Arial Black', sans-serif;
  font-weight: 900;
  font-size: 15px;
  color: #F9A825;
  letter-spacing: 1px;
  margin-bottom: 4px;
}
.footer-link {
  color: #C0C0C0;
  text-decoration: none;
  font-size: 15px;
  transition: color 0.2s, padding-left 0.2s;
  padding-left: 0;
}
.footer-link:hover {
  color: #FFFFFF;
  padding-left: 6px;
  border-left: 2px solid #FF6B35;
}
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.footer-contact-item {
  font-size: 14px;
  color: #C0C0C0;
}
.footer-contact-note {
  font-size: 13px;
  color: #888;
  margin-top: 8px;
  line-height: 1.5;
}
.footer-bottom {
  grid-column: 1 / -1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  margin-top: 24px;
  border-top: 1px solid #1A2A44;
}
.footer-legal,
.footer-icp {
  font-size: 13px;
  color: #666;
}
@media (max-width: 1023px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px 24px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}
@media (max-width: 639px) {
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-brand {
    align-items: center;
    text-align: center;
  }
  .footer-links,
  .footer-contact {
    align-items: center;
    text-align: center;
  }
  .footer-contact-item {
    text-align: center;
  }
  .footer-link:hover {
    padding-left: 0;
    border-left: none;
    color: #FF6B35;
  }
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
@media (max-width: 767px) {
  .container {
    padding: 0 16px;
  }
}
.main-content {
  min-height: calc(100vh - 180px);
  margin-left: 280px;
  padding: 40px 32px 60px;
}
@media (max-width: 1023px) {
  .main-content {
    margin-left: 0;
    padding: 80px 20px 48px;
  }
}
@media (max-width: 639px) {
  .main-content {
    padding: 72px 14px 36px;
  }
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: #FF6B35;
  transition: color 0.2s;
}
a:hover {
  color: #F9A825;
}
h1, h2, h3, h4, h5, h6 {
  font-family: Impact, 'Arial Black', sans-serif;
  font-weight: 900;
  line-height: 1.15;
  color: #FFFFFF;
  letter-spacing: 0.5px;
}
h1 { font-size: 48px; }
h2 { font-size: 32px; }
h3 { font-size: 24px; }
p {
  font-size: 16px;
  color: #C0C0C0;
  line-height: 1.7;
}
small, .text-small {
  font-size: 14px;
  color: #888;
}
::selection {
  background: #FF6B35;
  color: #0B1A30;
}
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: #0F1A2E;
}
::-webkit-scrollbar-thumb {
  background: #1A2A44;
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: #2E5BFF;
}