/* 全局样式 */
:root {
    --primary-color: #2c7be5;
    --secondary-color: #1e5daf;
    --accent-color: #25cb9e;
    --light-color: #f8fafd;
    --dark-color: #2c3e50;
    --gray-color: #95aac9;
    --border-color: #e3ebf6;
    --text-color: #3c4858;
    --text-light: #6e84a3;
    --shadow: 0 2px 10px rgba(44, 123, 229, 0.1);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

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

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

p {
    margin-bottom: 1rem;
}

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

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

ul {
    list-style: none;
}

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

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 4px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.primary-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
}

.primary-btn:hover {
    background-color: var(--secondary-color);
    color: white;
}

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

.outline-btn:hover {
    background-color: var(--primary-color);
    color: white;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: var(--primary-color);
}

.section-header p {
    color: var(--text-light);
    font-size: 1.1rem;
}

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

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

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

.logo-svg {
    height: 40px;
    width: auto;
}

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

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-links a {
    color: var(--dark-color);
    font-weight: 500;
    position: relative;
}

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

.nav-links a:hover::after,
.nav-links a:focus::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 30px;
    height: 20px;
    position: relative;
}

.mobile-menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--dark-color);
    position: absolute;
    transition: var(--transition);
}

.mobile-menu-toggle span:nth-child(1) {
    top: 0;
}

.mobile-menu-toggle span:nth-child(2) {
    top: 50%;
    transform: translateY(-50%);
}

.mobile-menu-toggle span:nth-child(3) {
    bottom: 0;
}

/* 首页横幅 */
.hero {
    padding: 80px 0 60px;
    background: linear-gradient(120deg, #f8fafd 0%, #edf2fa 100%);
    overflow: hidden;
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 40px;
}

.hero-content {
    flex: 1;
}

.hero-content h1 {
    font-size: 2.8rem;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.hero-content h2 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.hero-content p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: var(--text-light);
}

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

.hero-image {
    flex: 1;
    text-align: center;
}

/* 服务项目 */
.services {
    padding: 80px 0;
    background-color: #fff;
}

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

.service-card {
    padding: 30px;
    border-radius: 8px;
    background-color: #fff;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(44, 123, 229, 0.2);
}

.service-icon {
    margin: 0 auto 20px;
    width: 80px;
    height: 80px;
}

.service-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.service-card p {
    color: var(--text-light);
}

/* 我们的优势 */
.advantage {
    padding: 80px 0;
    background-color: var(--light-color);
}

.advantage-container {
    display: flex;
    align-items: center;
    gap: 40px;
}

.advantage-content {
    flex: 1;
}

.advantage-list li {
    display: flex;
    margin-bottom: 30px;
    gap: 20px;
    align-items: flex-start;
}

.advantage-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    padding: 5px 15px;
    border-radius: 50px;
    background-color: rgba(44, 123, 229, 0.1);
    display: inline-block;
}

.advantage-list h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
}

.advantage-list p {
    color: var(--text-light);
}

.advantage-image {
    flex: 1;
    text-align: center;
}

/* 成功案例 */
.cases {
    padding: 80px 0;
    background-color: #fff;
}

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

.case-card {
    padding: 30px;
    border-radius: 8px;
    background-color: #fff;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(44, 123, 229, 0.2);
}

.case-icon {
    margin-bottom: 20px;
    width: 80px;
    height: 80px;
}

.case-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.case-card p {
    color: var(--text-light);
}

/* 流程介绍 */
.process {
    padding: 80px 0;
    background-color: var(--light-color);
}

.process-flow {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.process-step {
    text-align: center;
    flex: 1;
    min-width: 200px;
    margin-bottom: 30px;
}

.step-number {
    width: 60px;
    height: 60px;
    line-height: 60px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 15px;
}

.process-step h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.process-step p {
    color: var(--text-light);
}

.process-arrow {
    width: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 联系我们 */
.contact {
    padding: 80px 0;
    background-color: #fff;
}

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

.contact-info {
    flex: 1;
}

.contact-info h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.contact-info ul li {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.contact-icon {
    width: 24px;
    height: 24px;
    margin-right: 15px;
}

.contact-form {
    flex: 1;
}

.contact-form h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-color);
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(44, 123, 229, 0.1);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

/* 页脚 */
footer {
    background-color: var(--dark-color);
    color: white;
    padding: 60px 0 20px;
}

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

.footer-logo {
    max-width: 300px;
    margin-bottom: 20px;
}

.footer-logo p {
    margin-top: 15px;
    color: rgba(255, 255, 255, 0.7);
}

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

.footer-links-column h4 {
    color: white;
    margin-bottom: 20px;
    font-size: 1.2rem;
}

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

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

.footer-links-column ul li a:hover {
    color: white;
}

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

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
}

/* 响应式设计 */
@media screen and (max-width: 992px) {
    .hero .container,
    .advantage-container,
    .contact-container {
        flex-direction: column;
    }
    
    .advantage-image {
        margin-top: 30px;
    }
    
    .process-arrow {
        transform: rotate(90deg);
        margin: -15px 0;
    }
    
    .footer-top {
        flex-direction: column;
    }
}

@media screen and (max-width: 768px) {
    .section-header h2 {
        font-size: 2rem;
    }
    
    .hero-content h1 {
        font-size: 2.2rem;
    }
    
    .hero-content h2 {
        font-size: 1.5rem;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: white;
        padding: 20px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        text-align: center;
        transform: translateY(-20px);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
}

@media screen and (max-width: 576px) {
    .hero-buttons {
        flex-direction: column;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 20px;
    }
}