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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f5f5f5;
}

html {
  scroll-padding-top: 80px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  background-color: white;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

header {
  background: linear-gradient(135deg, #1f5189 0%, #1b5e20 100%);
  color: white;
  padding: 2rem;
  text-align: center;
}

header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

header p {
  font-size: 1.1rem;
  opacity: 0.9;
}

nav {
  background-color: #f8f9fa;
  padding: 1rem 2rem;
  border-bottom: 2px solid #e0e0e0;
  position: sticky;
  top: 0;
  z-index: 100;
}

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
}

nav a {
  color: #667eea;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
}

nav a:hover {
  color: #1b5e20;
}

main {
  padding: 2rem;
}

section {
  margin-bottom: 3rem;
}

h2 {
  color: #1f5189;
  font-size: 2rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 3px solid #1f5189;
}

h3 {
  color: #1b5e20;
  font-size: 1.5rem;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

h4 {
  color: #555;
  font-size: 1.2rem;
  margin-top: 1rem;
  margin-bottom: 0.5rem;
}

p {
  margin-bottom: 1rem;
}

ul,
ol {
  margin-left: 2rem;
  margin-bottom: 1rem;
}

li {
  margin-bottom: 0.5rem;
}

.feature-box {
  background-color: #f8f9fa;
  border-left: 4px solid #667eea;
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.step-box {
  background-color: #fff;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  padding: 1.5rem;
  margin: 1rem 0;
}

.step-number {
  display: inline-block;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #1f5189 50%, #1b5e20 100%);
  color: white;
  border-radius: 50%;
  text-align: center;
  line-height: 40px;
  font-weight: bold;
  margin-right: 1rem;
  font-size: 1.2rem;
}

.workflow-diagram {
  background-color: #f8f9fa;
  padding: 2rem;
  border-radius: 8px;
  margin: 2rem 0;
  text-align: center;
}

.workflow-step {
  display: inline-block;
  background: white;
  padding: 1.5rem;
  margin: 0.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  max-width: 300px;
}

.arrow {
  font-size: 2rem;
  color: #667eea;
  margin: 0 1rem;
}

code {
  background-color: #f4f4f4;
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  font-family: "Courier New", monospace;
  color: #d63384;
}

.warning {
  background-color: #fff3cd;
  border-left: 4px solid #ffc107;
  padding: 1rem;
  margin: 1rem 0;
}

.tip {
  background-color: #d1ecf1;
  border-left: 4px solid #17a2b8;
  padding: 1rem;
  margin: 1rem 0;
}

footer {
  background-color: #333;
  color: white;
  text-align: center;
  padding: 2rem;
  margin-top: 3rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}

th,
td {
  padding: 0.75rem;
  text-align: left;
  border: 1px solid #ddd;
}

th {
  background-color: #1f5189;
  color: white;
}

tr:nth-child(even) {
  background-color: #f8f9fa;
}

.floating-home-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, #1f5189 0%, #1b5e20 100%);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  transition: all 0.3s;
  z-index: 1000;
}

.floating-home-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
  color: white;
}

@media (max-width: 768px) {
  .floating-home-btn {
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
    bottom: 1rem;
    right: 1rem;
  }
}