* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-card: rgba(255, 255, 255, 0.05);
  --text-primary: #ffffff;
  --text-secondary: #b0b0c0;
  --accent: #ffd700;
  --accent-hover: #ffed4a;
  --glass-bg: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.15);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --radius: 16px;
  --transition: 0.3s ease;
}
body {
  font-family: 'Segoe UI', 'PingFang SC', Roboto, 'Helvetica Neue', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}
a {
  color: var(--accent);
  text-decoration: none;
  transition: var(--transition);
}
a:hover {
  color: var(--accent-hover);
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.btn {
  display: inline-block;
  padding: 12px 32px;
  background: linear-gradient(135deg, var(--accent), #f0c000);
  color: #1a1a2e;
  font-weight: 700;
  border-radius: 40px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1rem;
  box-shadow: 0 4px 16px rgba(255, 215, 0, 0.3);
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 215, 0, 0.5);
}
.section {
  padding: 80px 0;
}
.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--accent), #fff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.section-sub {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 48px;
  font-size: 1.1rem;
}
.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px;
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: var(--transition);
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
  border-color: rgba(255, 215, 0, 0.2);
}
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(15, 15, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: var(--transition);
}
header.scrolled {
  background: rgba(15, 15, 26, 0.95);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  max-width: 1200px;
  margin: 0 auto;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.6rem;
  font-weight: 800;
}
.logo svg {
  width: 40px;
  height: 40px;
}
.logo span {
  background: linear-gradient(135deg, var(--accent), #fff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.nav {
  display: flex;
  gap: 24px;
  align-items: center;
}
.nav a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 6px 0;
  position: relative;
}
.nav a:hover,
.nav a.active {
  color: var(--accent);
}
.nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: var(--transition);
}
.nav a:hover::after,
.nav a.active::after {
  width: 100%;
}
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 8px;
}
.mobile-toggle span {
  display: block;
  width: 28px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}
.banner {
  padding-top: 80px;
  position: relative;
  overflow: hidden;
  min-height: 600px;
  display: flex;
  align-items: center;
}
.banner-slider {
  position: relative;
  width: 100%;
}
.banner-slide {
  display: none;
  padding: 60px 24px;
  text-align: center;
  animation: fadeIn 0.8s ease;
}
.banner-slide.active {
  display: block;
}
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.banner h1 {
  font-size: 3.2rem;
  font-weight: 900;
  margin-bottom: 20px;
  line-height: 1.2;
}
.banner h1 span {
  background: linear-gradient(135deg, var(--accent), #ff8c00);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.banner p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 32px;
}
.banner-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
}
.banner-bg svg {
  width: 100%;
  height: 100%;
  opacity: 0.15;
}
.banner-dots {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 32px;
}
.banner-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}
.banner-dots span.active {
  background: var(--accent);
  transform: scale(1.3);
}
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.grid-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 24px;
}
.grid-4 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 20px;
}
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}
.number-counter {
  font-size: 2.8rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent), #ff8c00);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.faq-item {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  cursor: pointer;
}
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-size: 1.1rem;
}
.faq-question span {
  transition: var(--transition);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  color: var(--text-secondary);
  padding-top: 0;
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding-top: 16px;
}
.faq-item.open .faq-question span {
  transform: rotate(180deg);
}
.article-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: var(--transition);
}
.article-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 215, 0, 0.2);
}
.article-card h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}
.article-card .date {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 12px;
}
.article-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}
footer {
  background: var(--bg-secondary);
  padding: 60px 24px 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-col h4 {
  font-size: 1.1rem;
  margin-bottom: 16px;
  color: var(--accent);
}
.footer-col a {
  display: block;
  color: var(--text-secondary);
  margin-bottom: 8px;
  font-size: 0.9rem;
}
.footer-col a:hover {
  color: var(--accent);
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 20px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
}
.footer-bottom a {
  color: var(--text-secondary);
  margin: 0 8px;
}
.footer-bottom a:hover {
  color: var(--accent);
}
.back-top {
  position: fixed;
  bottom: 40px;
  right: 40px;
  width: 48px;
  height: 48px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
  border: none;
  box-shadow: 0 4px 16px rgba(255, 215, 0, 0.3);
}
.back-top.show {
  opacity: 1;
  visibility: visible;
}
.back-top:hover {
  transform: scale(1.1);
}
.search-box {
  display: flex;
  gap: 8px;
  align-items: center;
}
.search-box input {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 24px;
  padding: 8px 16px;
  color: #fff;
  font-size: 0.9rem;
  width: 180px;
  outline: none;
  transition: var(--transition);
}
.search-box input:focus {
  border-color: var(--accent);
  width: 240px;
}
.search-box button {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1.2rem;
}
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 15, 26, 0.98);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
}
.mobile-menu.open {
  display: flex;
}
.mobile-menu a {
  color: var(--text-primary);
  font-size: 1.4rem;
  font-weight: 600;
}
.mobile-menu .close-btn {
  position: absolute;
  top: 24px;
  right: 24px;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 2rem;
  cursor: pointer;
}
.breadcrumb {
  padding: 16px 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
}
.breadcrumb a {
  color: var(--text-secondary);
}
.breadcrumb a:hover {
  color: var(--accent);
}
.breadcrumb span {
  margin: 0 8px;
}
@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: 1fr 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 768px) {
  .nav {
    display: none;
  }
  .mobile-toggle {
    display: flex;
  }
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  .banner h1 {
    font-size: 2rem;
  }
  .section-title {
    font-size: 1.6rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .search-box input {
    width: 120px;
  }
  .search-box input:focus {
    width: 160px;
  }
  .back-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
  }
}
@media (prefers-color-scheme: light) {
  :root {
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --bg-card: rgba(0, 0, 0, 0.03);
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a6a;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.08);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  }
  header {
    background: rgba(255, 255, 255, 0.85);
  }
  header.scrolled {
    background: rgba(255, 255, 255, 0.95);
  }
  .mobile-menu {
    background: rgba(255, 255, 255, 0.98);
  }
  .mobile-menu a {
    color: #1a1a2e;
  }
  .search-box input {
    background: rgba(0, 0, 0, 0.05);
    border-color: rgba(0, 0, 0, 0.1);
    color: #1a1a2e;
  }
}
.dark-mode {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-card: rgba(255, 255, 255, 0.05);
  --text-primary: #ffffff;
  --text-secondary: #b0b0c0;
  --glass-bg: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.15);
}
.light-mode {
  --bg-primary: #f5f7fa;
  --bg-secondary: #ffffff;
  --bg-card: rgba(0, 0, 0, 0.03);
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a6a;
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(0, 0, 0, 0.08);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}