/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 全局变量 */
:root {
    --primary-color: #0050B3;
    --secondary-color: #096DD9;
    --text-color: #262626;
    --text-secondary: #595959;
    --light-bg: #F5F5F5;
    --white: #ffffff;
    --border-color: #E8E8E8;
    --transition-normal: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 导航栏样式 */
.navbar {
    background: var(--white);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
    transition: var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-normal);
    padding: 8px 0;
}

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

.logo:hover::after,
.logo.active::after {
    width: 100%;
}

.logo:hover {
    transform: translateY(-1px);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
    margin: 0;
    padding: 0;
}

.nav-links li a {
    text-decoration: none;
    color: var(--text-color);
    font-size: 15px;
    transition: var(--transition-normal);
    position: relative;
    padding: 8px 0;
}

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

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

.nav-links li a:hover,
.nav-links li a.active {
    color: var(--primary-color);
}

/* Hero部分样式 */
.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 120px 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
    padding-top: 152px;  /* 导航栏高度 + 原padding-top */
}

.hero h1 {
    font-size: 44px;
    font-weight: 600;
    margin-bottom: 24px;
    line-height: 1.3;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease forwards;
}

.hero p {
    font-size: 18px;
    margin-bottom: 40px;
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease 0.2s forwards;
}

.hero-buttons {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease 0.4s forwards;
}

.cta-button {
    display: inline-block;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    border-radius: 4px;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.cta-button::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 120%;
    height: 120%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%) scale(0);
    border-radius: 50%;
    opacity: 0;
    transition: transform 0.5s ease, opacity 0.3s ease;
}

.cta-button:hover::after {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
}

.cta-button.primary {
    background: var(--white);
    color: var(--primary-color);
}

.cta-button.secondary {
    background: transparent;
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.8);
    margin-left: 16px;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* 数据统计部分 */
.stats {
    padding: 80px 0;
    background: var(--white);
    border-bottom: 1px solid var(--border-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.stat-item {
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
}

.stat-item.visible {
    animation: fadeInUp 0.8s ease forwards;
}

.stat-number {
    font-size: 36px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 15px;
    color: var(--text-secondary);
}

/* 服务部分样式 */
.services {
    padding: 96px 0;
    background: var(--light-bg);
}

.section-title {
    text-align: center;
    margin-bottom: 64px;
    opacity: 0;
    transform: translateY(20px);
}

.section-title.visible {
    animation: fadeInUp 0.8s ease forwards;
}

.section-title h2 {
    font-size: 32px;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 16px;
}

.section-title p {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.service-card {
    background: var(--white);
    padding: 32px;
    border-radius: 8px;
    transition: var(--transition-normal);
    opacity: 0;
    transform: translateY(20px);
}

.service-card.visible {
    animation: fadeInUp 0.8s ease forwards;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.service-icon {
    width: 56px;
    height: 56px;
    background: rgba(0, 80, 179, 0.08);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    transition: var(--transition-normal);
}

.service-card:hover .service-icon {
    transform: scale(1.1);
    background: var(--primary-color);
}

.service-card:hover .service-icon i {
    color: var(--white);
}

.service-icon i {
    font-size: 24px;
    color: var(--primary-color);
    transition: var(--transition-normal);
}

.service-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-color);
}

.service-card p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 15px;
}

.service-features {
    list-style: none;
}

.service-features li {
    display: flex;
    align-items: center;
    margin-bottom: 12px;
    color: var(--text-secondary);
    font-size: 14px;
}

.service-features li i {
    color: var(--primary-color);
    margin-right: 12px;
    font-size: 14px;
}

/* 优势部分样式 */
.advantages {
    padding: 96px 0;
    background: var(--white);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 32px;
}

.advantage-item {
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
}

.advantage-item.visible {
    animation: fadeInUp 0.8s ease forwards;
}

.advantage-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
    background: rgba(0, 80, 179, 0.08);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-normal);
}

.advantage-item:hover .advantage-icon {
    transform: rotateY(180deg);
    background: var(--primary-color);
}

.advantage-item:hover .advantage-icon i {
    color: var(--white);
    transform: rotateY(180deg);
}

.advantage-icon i {
    font-size: 28px;
    color: var(--primary-color);
    transition: var(--transition-normal);
}

.advantage-item h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-color);
}

.advantage-item p {
    color: var(--text-secondary);
    font-size: 15px;
}

/* 关于我们部分样式 */
.about {
    padding: 96px 0;
    background: var(--light-bg);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.about-text p {
    margin-bottom: 32px;
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.8;
}

.tech-stack {
    margin-top: 40px;
}

.tech-stack h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-color);
}

.tech-icons {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.tech-icon {
    padding: 8px 16px;
    background: var(--white);
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    transition: var(--transition-normal);
}

.tech-icon:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.tech-icon i {
    color: var(--primary-color);
}

.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.feature-item {
    padding: 24px;
    background: var(--white);
    border-radius: 8px;
    transition: var(--transition-normal);
}

.feature-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.feature-item i {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 16px;
}

.feature-item h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-color);
}

.feature-item p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* 联系我们部分样式 */
.contact {
    padding: 96px 0;
    background: var(--white);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
    margin-top: 48px;
}

.contact-info {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.contact-item {
    padding: 32px;
    background: var(--light-bg);
    border-radius: 8px;
    transition: var(--transition-normal);
}

.contact-item i {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 16px;
}

.contact-item h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-color);
}

.contact-item p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
    margin-bottom: 8px;
}

.contact-item p:last-child {
    margin-bottom: 0;
}

.contact-card {
    background: var(--light-bg);
    border-radius: 8px;
    padding: 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
}

.contact-text {
    text-align: center;
    margin-bottom: 24px;
}

.contact-text h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 12px;
}

.contact-text p {
    color: var(--text-secondary);
    font-size: 15px;
}

.qr-code {
    text-align: center;
}

.qr-code img {
    width: 180px;
    height: 180px;
    border-radius: 8px;
    margin-bottom: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.qr-code p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* 页脚样式 */
.footer {
    background: var(--light-bg);
    padding: 64px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 64px;
    margin-bottom: 48px;
}

.footer-info h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 16px;
}

.footer-info p {
    color: var(--text-secondary);
    max-width: 400px;
    margin-bottom: 8px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition-normal);
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* 面包屑导航样式 */
.breadcrumb {
    background: var(--white);
    padding: 8px 0;
    margin-top: 72px;
    border-bottom: 1px solid var(--border-color);
}

.breadcrumb ol {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
}

.breadcrumb li {
    font-size: 14px;
    color: var(--text-secondary);
}

.breadcrumb a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-normal);
}

.breadcrumb a:hover {
    color: var(--primary-color);
}

/* 动画关键帧 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 移动端导航按钮 */
.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    position: relative;
    z-index: 1001;
}

.mobile-nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--primary-color);
    margin: 6px 0;
    transition: var(--transition-normal);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 36px;
    }

    .hero p {
        font-size: 16px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .service-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 32px;
    }

    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .navbar {
        height: 60px;
    }

    .navbar .container {
        height: 60px;
    }

    /* 导航栏移动端样式 */
    .mobile-nav-toggle {
        display: block;
        position: relative;
        background: none;
        border: none;
        width: 30px;
        height: 24px;
        padding: 0;
        cursor: pointer;
    }

    .mobile-nav-toggle span {
        display: block;
        position: absolute;
        height: 2px;
        width: 100%;
        background: var(--primary-color);
        transition: all 0.3s ease;
    }

    .mobile-nav-toggle span:nth-child(1) { top: 0; }
    .mobile-nav-toggle span:nth-child(2) { top: 11px; }
    .mobile-nav-toggle span:nth-child(3) { top: 22px; }

    .mobile-nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg);
        top: 11px;
    }

    .mobile-nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg);
        top: 11px;
    }

    .nav-links {
        display: none;
        position: fixed;
        top: 0;
        right: 0;
        width: 100%;
        max-width: 300px;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        align-items: center;
        padding: 80px 0 40px;
    }

    .nav-links.active {
        display: flex;
        box-shadow: -4px 0 15px rgba(0, 0, 0, 0.1);
    }

    .nav-links li {
        width: 100%;
    }

    .nav-links li a {
        display: block;
        padding: 15px 25px;
        font-size: 16px;
        color: var(--text-color);
        text-align: center;
        width: 100%;
        transition: all 0.3s ease;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
        color: var(--primary-color);
        background: rgba(0, 123, 255, 0.05);
    }

    body.menu-open {
        overflow: hidden;
    }

    /* 内容区域移动端样式 */
    .hero {
        padding-top: 120px;
        padding-bottom: 60px;
        text-align: center;
    }

    .hero h1 {
        font-size: 28px;
    }

    .hero p {
        font-size: 15px;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 16px;
    }

    .cta-button {
        width: 100%;
        text-align: center;
    }

    .cta-button.secondary {
        margin-left: 0;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .service-grid {
        grid-template-columns: 1fr;
    }

    .service-card {
        padding: 24px;
    }

    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .tech-icons {
        justify-content: center;
    }

    .contact-info {
        grid-template-columns: 1fr;
    }

    .section-title h2 {
        font-size: 24px;
    }

    .section-title p {
        font-size: 14px;
    }
}