/* 基础样式设置 */
:root {
    --primary-color: #0055a8;
    --secondary-color: #00b3e3;
    --accent-color: #ffa500;
    --text-color: #333333;
    --light-text: #ffffff;
    --background-color: #ffffff;
    --light-bg: #f5f9ff;
    --dark-bg: #004080;
    --border-radius: 8px;
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
    color: var(--text-color);
    background-color: var(--background-color);
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1.2rem;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--secondary-color);
}

ul, ol {
    list-style: none;
}

img, svg {
    max-width: 100%;
    height: auto;
}

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

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    position: relative;
    color: var(--primary-color);
}

.section-title::after {
    content: "";
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--secondary-color);
    border-radius: 2px;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    text-transform: none;
    border: none;
    outline: none;
}

.btn.primary {
    background-color: var(--primary-color);
    color: var(--light-text);
}

.btn.primary:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: var(--box-shadow);
}

.btn.secondary {
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn.secondary:hover {
    background-color: var(--primary-color);
    color: var(--light-text);
    transform: translateY(-3px);
}

/* 头部样式 */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: 15px 0;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-container {
    display: flex;
    align-items: center;
}

.logo-container h1 {
    margin-left: 10px;
    font-size: 1.8rem;
    margin-bottom: 0;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    align-items: center;
}

.nav-menu li {
    margin-left: 25px;
}

.nav-menu a {
    color: var(--text-color);
    font-weight: 600;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    bottom: -5px;
    left: 0;
    transition: var(--transition);
}

.nav-menu a:hover::after {
    width: 100%;
}

.cta-button {
    padding: 8px 20px;
    background-color: var(--primary-color);
    color: var(--light-text) !important;
    border-radius: var(--border-radius);
}

.cta-button:hover {
    background-color: var(--secondary-color);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    background: transparent;
    border: none;
    cursor: pointer;
}

.menu-toggle span {
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

/* 英雄区域 */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(135deg, var(--light-bg) 0%, #e6f0ff 100%);
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.hero-content {
    max-width: 600px;
}

.hero-content h2 {
    font-size: 2.8rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.hero-content h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--secondary-color);
}

.hero-content .highlight {
    color: var(--secondary-color);
}

.hero-buttons {
    margin-top: 30px;
    display: flex;
    gap: 15px;
}

.hero-image {
    flex-shrink: 0;
    animation: float 5s ease-in-out infinite;
}

@keyframes float {
    0% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
    100% {
        transform: translateY(0);
    }
}

/* 服务区域 */
.services {
    padding: 100px 0;
    background-color: var(--background-color);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.service-card {
    padding: 30px;
    background: var(--light-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.service-icon {
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
}

.service-card h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

/* 优势区域 */
.advantages {
    padding: 100px 0;
    background-color: var(--light-bg);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.advantage-item {
    padding: 30px;
    background: var(--background-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    position: relative;
    transition: var(--transition);
}

.advantage-item:hover {
    transform: translateY(-5px);
}

.advantage-number {
    font-size: 4rem;
    font-weight: 900;
    position: absolute;
    top: -20px;
    right: 20px;
    color: rgba(0, 85, 168, 0.1);
    z-index: 0;
}

.advantage-item h3 {
    position: relative;
    z-index: 1;
    color: var(--primary-color);
}

.advantage-item p {
    position: relative;
    z-index: 1;
}

/* 案例区域 */
.cases {
    padding: 100px 0;
    background-color: var(--background-color);
}

.cases-slider {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
}

.case-item {
    flex: 1;
    min-width: 300px;
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.case-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.case-content {
    padding: 30px;
}

.case-tag {
    display: inline-block;
    padding: 5px 15px;
    background-color: rgba(0, 85, 168, 0.1);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.case-stats {
    margin-top: 20px;
    display: flex;
    justify-content: space-around;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    display: block;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-color);
}

/* 关于我们 */
.about {
    padding: 100px 0;
    background-color: var(--light-bg);
}

.about-content {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
}

.about-text {
    flex: 2;
    min-width: 300px;
}

.about-values {
    flex: 1;
    min-width: 300px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.value-item {
    padding: 20px;
    background-color: var(--background-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.value-item h4 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

/* 联系区域 */
.contact {
    padding: 100px 0;
    background-color: var(--background-color);
}

.contact-content {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
}

.contact-info {
    flex: 1;
    min-width: 300px;
}

.contact-method {
    display: flex;
    align-items: center;
    margin: 20px 0;
}

.contact-method svg {
    margin-right: 15px;
}

.contact-form {
    flex: 1;
    min-width: 300px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    background-color: #f9f9f9;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 85, 168, 0.1);
}

/* 页脚 */
footer {
    padding: 70px 0 20px;
    background-color: var(--dark-bg);
    color: var(--light-text);
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 40px;
    margin-bottom: 50px;
}

.footer-logo {
    display: flex;
    align-items: center;
}

.footer-logo h3 {
    margin-left: 10px;
    margin-bottom: 0;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
}

.footer-links-column h4 {
    margin-bottom: 20px;
    color: var(--light-text);
}

.footer-links-column ul li {
    margin-bottom: 10px;
}

.footer-links-column a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-links-column a:hover {
    color: var(--light-text);
}

.footer-bottom {
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.footer-bottom p:first-child {
    margin-bottom: 5px;
}

/* 媒体查询 - 响应式设计 */
@media (max-width: 992px) {
    .hero .container {
        flex-direction: column;
    }
    
    .hero-content {
        text-align: center;
        margin-bottom: 40px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .advantage-number {
        font-size: 3rem;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        flex-direction: column;
        background-color: var(--background-color);
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
        padding: 20px 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.5s ease;
    }
    
    .nav-menu.active {
        max-height: 500px;
    }
    
    .nav-menu li {
        margin: 15px 0;
    }
    
    .cases-slider {
        justify-content: center;
    }
    
    .hero-content h2 {
        font-size: 2.2rem;
    }
    
    .hero-content h3 {
        font-size: 1.5rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .hero {
        padding: 120px 0 60px;
    }
    
    .services,
    .advantages,
    .cases,
    .about,
    .contact {
        padding: 60px 0;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .btn {
        padding: 10px 20px;
    }
    
    .advantage-number {
        font-size: 2.5rem;
    }
}