* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
}
body {
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
    color: #333;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}
body::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
    radial-gradient(circle at 10% 20%, rgba(255, 255, 255, 0.05) 0%, transparent 20%),
    radial-gradient(circle at 90% 80%, rgba(255, 255, 255, 0.05) 0%, transparent 20%);
    z-index: -1;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}
.logo {
    display: flex;
    align-items: center;
}
.logo-icon {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
}
.logo-icon span {
    font-size: 24px;
    font-weight: bold;
}
nav ul {
    display: flex;
    list-style: none;
}
nav li {
    margin-left: 25px;
}
nav ul li:nth-last-child(2),
nav ul li:nth-last-child(3),
nav ul li:nth-last-child(4),
nav ul li:nth-last-child(5) {
    margin-left: 10px;
}
nav a {
    color: #2c4a7a;
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
    transition: all 0.3s ease;
    padding: 8px 0;
    position: relative;
}
nav a:hover {
    color: #1a2c4e;
}
nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(45deg, #4a6bac, #2c4a7a);
    transition: width 0.3s ease;
}
nav a:hover::after {
    width: 100%;
}
.current {
    color: #1a2c4e;
}
.current::after {
    width: 100%;
}
footer {
    text-align: center;
    padding: 30px 0;
    margin-top: 50px;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    color: #4a5568;
    font-size: 0.9rem;
}