/* Reset & Basic Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

a {
    text-decoration: none;
    color: #333;
    transition: color 0.3s;
}

a:hover {
    color: #003366;
}

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #003366;
}

.logo span {
    color: #666;
    font-size: 14px;
    margin-left: 10px;
    font-weight: normal;
}

nav ul {
    display: flex;
}

nav li {
    margin-left: 40px;
}

nav a {
    font-size: 16px;
    font-weight: 500;
    color: #555;
    padding-bottom: 5px;
}

nav a.active, nav a:hover {
    color: #003366;
    border-bottom: 2px solid #003366;
}

/* Banner Section */
.banner {
    background: linear-gradient(135deg, #003366 0%, #004080 100%);
    color: #fff;
    padding: 100px 0;
    text-align: center;
}

.banner h1 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: normal;
    letter-spacing: 2px;
}

.banner p {
    font-size: 18px;
    opacity: 0.9;
    max-width: 800px;
    margin: 0 auto;
}

/* Main Content Sections */
.section {
    padding: 80px 0;
    background-color: #fff;
}

.section-alt {
    background-color: #f9f9f9;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 32px;
    color: #003366;
    margin-bottom: 15px;
}

.section-title p {
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: #fff;
    padding: 40px;
    border-radius: 4px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    text-align: center;
    border-top: 4px solid #003366;
    transition: transform 0.3s;
}

.service-card:hover {
    transform: translateY(-5px);
}

.service-card h3 {
    margin: 20px 0;
    color: #333;
}

.service-card p {
    color: #666;
    font-size: 14px;
}

/* About Page Content */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: justify;
}

.about-content p {
    margin-bottom: 20px;
    font-size: 16px;
    line-height: 1.8;
}

/* Footer */
footer {
    background-color: #333;
    color: #aaa;
    padding: 40px 0;
    text-align: center;
    font-size: 14px;
}

footer p {
    margin: 10px 0;
}

footer a {
    color: #aaa;
}

footer a:hover {
    color: #fff;
    text-decoration: underline;
}

/* Utility */
.btn {
    display: inline-block;
    background-color: #003366;
    color: #fff;
    padding: 10px 25px;
    border-radius: 2px;
    margin-top: 20px;
    transition: background 0.3s;
}

.btn:hover {
    background-color: #004080;
    color: #fff;
}

/* Contact List */
.contact-list {
    max-width: 600px;
    margin: 0 auto;
    background: #fff;
    padding: 40px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    border-radius: 4px;
}

.contact-item {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.contact-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.contact-item h3 {
    font-size: 18px;
    color: #003366;
    margin-bottom: 10px;
}