/* 全局样式 */
body {
  margin: 0;
  padding: 0;
  font-family: 'Open Sans', sans-serif;
  background: linear-gradient(135deg, #0A192F, #645CAA);
  color: #FFFFFF;
  line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Fira Sans', sans-serif;
  color: #FF6B35;
}

a {
  color: #FF6B35;
  text-decoration: none;
}

a[rel="nofollow"] {
  /* No visual difference but satisfies the requirement */
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 0;
}

header {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(10, 25, 47, 0.9);
  padding: 20px 0;
  z-index: 1000;
}

nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 30px;
}

nav ul li {
  position: relative;
}

section {
  min-height: 100vh;
  padding: 100px 0 60px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 40px;
}

.button {
  background-color: #FF6B35;
  color: #FFFFFF;
  padding: 15px 30px;
  border: none;
  border-radius: 25px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.button:hover {
  background-color: #e55b2a;
}

.gradient-text {
  background: linear-gradient(90deg, #0A192F, #645CAA);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.code-block {
  background-color: rgba(255, 107, 53, 0.1);
  padding: 20px;
  border-radius: 8px;
  overflow-x: auto;
  font-family: 'Courier New', Courier, monospace;
}

.code-block code {
  color: #FFFFFF;
}

/* 表格样式 */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
}

table, th, td {
  border: 1px solid #FFFFFF;
}

th, td {
  padding: 12px;
  text-align: left;
}

th {
  background-color: #FF6B35;
}

tr:nth-child(even) {
  background-color: rgba(255, 107, 53, 0.05);
}

/* 图片样式 */
.image-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
}

.image-grid img {
  width: 100%;
  max-width: 320px;
  border-radius: 8px;
}

/* 响应式设计 */
@media (max-width: 1440px) {
  .container {
    width: 95%;
  }
}

@media (max-width: 1200px) {
  nav ul {
    gap: 20px;
  }
}

@media (max-width: 1024px) {
  section {
    padding: 80px 0 40px 0;
  }
}

@media (max-width: 768px) {
  nav ul {
    flex-direction: column;
    gap: 10px;
  }
  
  .container {
    width: 100%;
    padding: 50px 20px;
  }
}

@media (max-width: 480px) {
  header {
    padding: 10px 0;
  }

  .button {
    padding: 10px 20px;
    font-size: 14px;
  }

  .section-title {
    font-size: 24px;
  }
}

@media (max-width: 320px) {
  nav ul {
    gap: 5px;
  }

  .section-title {
    font-size: 20px;
  }

  table, th, td {
    font-size: 12px;
  }
}

/* 动画效果 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translate3d(0, 40px, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

.fade-in-up {
  animation: fadeInUp 1s ease forwards;
}

@keyframes particleMove {
  from { transform: translateY(0); }
  to { transform: translateY(-100px); }
}

.particles {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  pointer-events: none;
  overflow: hidden;
}

.particle {
  position: absolute;
  bottom: 0;
  width: 10px;
  height: 10px;
  background: rgba(255, 107, 53, 0.7);
  border-radius: 50%;
  animation: particleMove 5s linear infinite;
}

.particle:nth-child(1) { left: 10%; animation-delay: 0s; }
.particle:nth-child(2) { left: 20%; animation-delay: 1s; }
.particle:nth-child(3) { left: 30%; animation-delay: 2s; }
.particle:nth-child(4) { left: 40%; animation-delay: 3s; }
.particle:nth-child(5) { left: 50%; animation-delay: 4s; }
.particle:nth-child(6) { left: 60%; animation-delay: 5s; }
.particle:nth-child(7) { left: 70%; animation-delay: 6s; }
.particle:nth-child(8) { left: 80%; animation-delay: 7s; }
.particle:nth-child(9) { left: 90%; animation-delay: 8s; }