/* 全局样式 */
:root {
    --primary-color: #0056b3;
    --secondary-color: #00376b;
    --accent-color: #ffc107;
    --text-color: #333;
    --light-text: #fff;
    --background-color: #fff;
    --section-bg: #f8f9fa;
    --card-bg: #fff;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px 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', 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--background-color);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 15px;
}

p {
    margin-bottom: 15px;
}

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

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

ul {
    list-style: none;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--primary-color);
    position: relative;
    display: inline-block;
}

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

.section-header p {
    font-size: 1.2rem;
    color: #666;
}

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

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

.btn-primary:hover {
    background-color: var(--secondary-color);
    color: var(--light-text);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

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

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: var(--light-text);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* 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: 20px 0;
    transition: var(--transition);
}

header.scrolled {
    padding: 15px 0;
    background-color: rgba(255, 255, 255, 0.98);
}

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

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

.logo .slogan {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 0;
}

nav ul {
    display: flex;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    color: var(--text-color);
    font-weight: 600;
    position: relative;
    padding-bottom: 5px;
}

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

nav ul li a:hover:after,
nav ul li a.active:after {
    width: 100%;
}

nav ul li a.active {
    color: var(--primary-color);
}

/* 英雄区域样式 */
.hero {
    height: 100vh;
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('https://images.unsplash.com/photo-1567427017947-545c5f8d16ad?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    color: var(--light-text);
    text-align: center;
    padding-top: 70px;
}

/* 面包屑导航样式 */
.breadcrumb {
    background-color: #f8f9fa;
    padding: 10px 0;
    border-bottom: 1px solid #e9ecef;
    margin-top: 70px;
}

.breadcrumb-list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.breadcrumb-list li {
    font-size: 0.9rem;
    color: #6c757d;
}

.breadcrumb-list li a {
    color: var(--primary-color);
    text-decoration: none;
}

.breadcrumb-list li a:hover {
    text-decoration: underline;
}

.breadcrumb-separator {
    margin: 0 10px;
}

.hero-content h2 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    animation: fadeInDown 1s ease-out;
}

.hero-content p {
    font-size: 1.5rem;
    margin-bottom: 40px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 1s ease-out;
}

.hero-buttons {
    animation: fadeIn 1.5s ease-out;
}

.hero-buttons a {
    margin: 0 10px;
}

/* 服务部分样式 */
.services {
    padding: 100px 0;
    background-color: var(--section-bg);
}

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

.service-card {
    background-color: var(--card-bg);
    border-radius: 10px;
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.service-card .icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

/* 优势部分样式 */
.advantages {
    padding: 100px 0;
    background-color: var(--background-color);
}

/* 使用场景部分样式 */
.scenarios {
    padding: 100px 0;
    background-color: var(--section-bg);
}

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

.scenario-card {
    background-color: var(--card-bg);
    border-radius: 10px;
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

.scenario-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.scenario-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    width: 80px;
    height: 80px;
    line-height: 80px;
    border-radius: 50%;
    background-color: rgba(0, 86, 179, 0.1);
    margin: 0 auto 20px;
}

.scenario-card h3 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

/* 信任元素部分样式 */
.trust {
    padding: 100px 0;
    background-color: var(--section-bg);
}

/* FAQ部分样式 */
.faq {
    padding: 100px 0;
    background-color: var(--background-color);
}

.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
    background-color: var(--card-bg);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.faq-item:hover {
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.faq-question {
    padding: 20px 30px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #f9f9f9;
    transition: var(--transition);
}

.faq-question h3 {
    margin: 0;
    font-size: 1.2rem;
    color: var(--primary-color);
}

.faq-icon {
    color: var(--primary-color);
    transition: var(--transition);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 30px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 20px 30px;
    max-height: 500px;
}

.stats-container {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    margin-bottom: 70px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    min-width: 200px;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stat-title {
    font-size: 1.2rem;
    color: #666;
}

.testimonial-heading {
    text-align: center;
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 40px;
    position: relative;
}

.testimonial-heading:after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background-color: var(--accent-color);
}

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

.testimonial {
    background-color: var(--card-bg);
    border-radius: 10px;
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.testimonial:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.testimonial-content {
    margin-bottom: 20px;
    position: relative;
}

.testimonial-content p {
    font-style: italic;
    color: #555;
    line-height: 1.7;
}

.testimonial-author {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.author-title {
    font-size: 0.9rem;
    color: #777;
}

.advantages-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

.advantage-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    background-color: var(--card-bg);
}

.advantage-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.advantage-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    width: 80px;
    height: 80px;
    line-height: 80px;
    border-radius: 50%;
    background-color: rgba(0, 86, 179, 0.1);
}

.advantage-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

/* 流程部分样式 */
.process {
    padding: 100px 0;
    background-color: var(--section-bg);
}

.process-timeline {
    max-width: 1100px;
    margin: 0 auto;
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.process-timeline:before {
    content: '';
    position: absolute;
    top: 30px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
    z-index: 1;
}

.process-step {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 22%;
    z-index: 2;
}

.step-number {
    width: 60px;
    height: 60px;
    background-color: var(--primary-color);
    color: var(--light-text);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    box-shadow: 0 0 0 10px rgba(0, 86, 179, 0.1);
}

.step-content {
    width: 100%;
    padding: 20px;
    background-color: var(--card-bg);
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.step-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.step-content h3 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

/* 联系部分样式 */
.contact {
    padding: 100px 0;
    background-color: var(--background-color);
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.centered-contact {
    grid-template-columns: 1fr;
    max-width: 800px;
    margin: 0 auto;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.contact-method {
    text-align: center;
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    background-color: var(--card-bg);
    position: relative;
}

.contact-method:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.copy-btn {
    margin-top: 10px;
    padding: 8px 15px;
    background-color: #f0f0f0;
    color: var(--primary-color);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
}

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

.copy-btn i {
    margin-right: 5px;
}

.contact-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.contact-method h3 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.contact-form {
    background-color: var(--card-bg);
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.contact-form h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    text-align: center;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    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(0, 86, 179, 0.1);
}

/* 页脚样式 */
footer {
    background-color: #002147;
    color: var(--light-text);
    padding: 70px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.footer-seo {
    grid-column: 1 / -1;
    margin-top: 20px;
}

.footer-seo h3 {
    color: var(--accent-color);
    font-size: 1.3rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-seo h3:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--accent-color);
}

.footer-seo p {
    color: #ccc;
    line-height: 1.6;
    font-size: 0.9rem;
}

.footer-logo h2 {
    font-size: 1.8rem;
    color: var(--light-text);
    margin-bottom: 10px;
}

.footer-links h3,
.footer-services h3,
.footer-contact h3 {
    color: var(--accent-color);
    font-size: 1.3rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-links h3:after,
.footer-services h3:after,
.footer-contact h3:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--accent-color);
}

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

.footer-links ul li a {
    color: #ccc;
}

.footer-links ul li a:hover {
    color: var(--accent-color);
    padding-left: 5px;
}

.footer-services ul li {
    color: #ccc;
}

.footer-contact p {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
}

.footer-contact p i {
    margin-right: 10px;
    color: var(--accent-color);
}

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

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: var(--light-text);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    z-index: 99;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--secondary-color);
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

/* 移动端导航 */
.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--primary-color);
    cursor: pointer;
    z-index: 1001;
}

@media screen and (max-width: 768px) {
    .mobile-nav-toggle {
        display: block;
        position: absolute;
        right: 20px;
        top: 20px;
    }
    
    nav ul {
        position: fixed;
        top: 0;
        right: -100%;
        width: 250px;
        height: 100vh;
        background-color: var(--background-color);
        flex-direction: column;
        justify-content: flex-start;
        align-items: flex-start;
        padding: 80px 30px 30px;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
        transition: right 0.3s ease;
        z-index: 1000;
    }
    
    nav.active ul {
        right: 0;
    }
    
    nav ul li {
        margin: 15px 0;
        width: 100%;
    }
    
    header .container {
        position: relative;
    }
}

/* 动画效果 */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* 响应式设计 */
@media screen and (max-width: 992px) {
    .section-header h2 {
        font-size: 2rem;
    }
    
    .hero-content h2 {
        font-size: 2.5rem;
    }
    
    .hero-content p {
        font-size: 1.2rem;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
    }
}

@media screen and (max-width: 768px) {
    header .container {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
    
    .logo {
        z-index: 1001;
    }
    
    nav {
        margin-top: 0;
    }
    
    .process-timeline {
        flex-direction: column;
        align-items: center;
    }
    
    .process-timeline:before {
        display: none;
    }
    
    .process-step {
        width: 100%;
        max-width: 350px;
        margin-bottom: 30px;
    }
}

@media screen and (max-width: 576px) {
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    .hero-buttons a {
        display: block;
        margin: 10px auto;
        width: 200px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
}