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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* 头部导航 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    z-index: 1000;
    transition: all 0.3s ease;
    padding: 1rem 0;
}

.header.scrolled {
    background-color: rgba(0, 0, 0, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.logo {
    color: #fff;
    font-size: 1.5rem;
    font-weight: bold;
    z-index: 1001;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: #fff;
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.3s ease;
    padding: 0.5rem 0;
}

.nav-links a:hover {
    color: #007bff;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    z-index: 1001;
    padding: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: #fff;
    transition: all 0.3s ease;
}

/* 主要内容区域 */
main {
    margin-top: 70px;
}

section {
    padding: 4rem 1rem;
}

section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #1a1a1a;
}

/* 英雄区域 */
.hero {
    background: linear-gradient(135deg, #1a1a1a, #2c3e50);
    padding: 6rem 0;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-text {
    color: #fff;
    z-index: 2;
}

.hero-text h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-text p {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-features {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.hero-features span {
    background: rgba(255, 255, 255, 0.1);
    padding: 0.8rem 1.5rem;
    border-radius: 30px;
    font-size: 1rem;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.hero-features span:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.hero-image {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.banner-image {
    width: 100%;
    height: auto;
    max-width: 500px;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
}

.banner-image:hover {
    transform: scale(1.02);
}

/* 全局布局框架 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.section-wrapper {
    position: relative;
    padding: 4rem 0;
    background-color: #fff;
}

.section-wrapper:nth-child(even) {
    background-color: #f8f9fa;
}

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

.section-header h2 {
    font-size: 2.5rem;
    color: #1a1a1a;
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: #007bff;
}

.section-header p {
    font-size: 1.2rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* 服务项目框架 */
.services .section-wrapper {
    background: linear-gradient(to bottom, #fff, #f8f9fa);
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    position: relative;
}

.service-card {
    background: #fff;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(to right, #007bff, #00bcd4);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #1a1a1a;
}

.service-details {
    list-style: none;
    margin-top: 1rem;
}

.service-details li {
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.service-details li::before {
    content: "•";
    color: #007bff;
    position: absolute;
    left: 0;
}

/* 技术优势框架 */
.features .section-wrapper {
    background: linear-gradient(to bottom, #f8f9fa, #fff);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    position: relative;
}

.feature-card {
    background: #fff;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    text-align: center;
    position: relative;
}

.feature-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background-color: #007bff;
    transition: width 0.3s ease;
}

.feature-card:hover::after {
    width: 100px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #1a1a1a;
}

.feature-details {
    list-style: none;
    margin-top: 1rem;
}

.feature-details li {
    margin-bottom: 0.5rem;
}

/* 服务流程框架 */
.process .section-wrapper {
    background: linear-gradient(135deg, #fff, #f8f9fa);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    position: relative;
}

.process-steps::before {
    content: '';
    position: absolute;
    top: 50px;
    left: 0;
    width: 100%;
    height: 2px;
    background: #e9ecef;
    z-index: 1;
}

.step {
    background: #fff;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 2;
    text-align: center;
}

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #007bff, #00bcd4);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.5rem;
    margin: 0 auto 1.5rem;
    position: relative;
    z-index: 3;
}

.step h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #1a1a1a;
}

.step-details {
    list-style: none;
    margin-top: 1rem;
}

.step-details li {
    margin-bottom: 0.5rem;
}

/* 成功案例框架 */
.cases .section-wrapper {
    background: linear-gradient(to bottom, #f8f9fa, #fff);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    position: relative;
}

.case-card {
    background: #fff;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.case-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, transparent 50%, rgba(0, 123, 255, 0.1) 50%);
    border-radius: 0 0 0 100px;
}

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.case-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #1a1a1a;
}

.case-card p {
    font-size: 1.2rem;
    color: #007bff;
    margin-bottom: 1rem;
}

.case-details {
    list-style: none;
    margin-top: 1rem;
}

.case-details li {
    margin-bottom: 0.5rem;
}

/* FAQ框架 */
.faq .section-wrapper {
    background: linear-gradient(to bottom, #fff, #f8f9fa);
}

.faq-container {
    max-width: 1000px;
    margin: 0 auto;
}

.faq-category {
    margin-bottom: 3rem;
    background: #fff;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.faq-category h3 {
    font-size: 1.8rem;
    color: #1a1a1a;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #007bff;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.faq-item {
    background: #f8f9fa;
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #f8f9fa;
    transition: background-color 0.3s ease;
}

.faq-question:hover {
    background-color: #e9ecef;
}

.faq-question h4 {
    font-size: 1.2rem;
    color: #1a1a1a;
    margin: 0;
    font-weight: 600;
}

.faq-toggle {
    font-size: 1.5rem;
    color: #007bff;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    background-color: #fff;
}

.faq-item.active .faq-answer {
    padding: 1.5rem;
    max-height: 1000px;
}

.faq-answer p {
    margin-bottom: 1rem;
    color: #666;
    line-height: 1.6;
}

.faq-answer ul {
    list-style: none;
    padding-left: 1rem;
}

.faq-answer ul li {
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
    color: #666;
}

.faq-answer ul li::before {
    content: "•";
    color: #007bff;
    position: absolute;
    left: 0;
}

/* 联系我们框架 */
.contact .section-wrapper {
    background: linear-gradient(135deg, #f8f9fa, #fff);
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    position: relative;
}

.contact-item {
    background: #fff;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.contact-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 123, 255, 0.1), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.contact-item:hover::before {
    opacity: 1;
}

.contact-item h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #1a1a1a;
}

.contact-details {
    list-style: none;
    margin-top: 1rem;
}

.contact-details li {
    margin-bottom: 0.5rem;
}

/* 页脚 */
.footer {
    background-color: #1a1a1a;
    color: #fff;
    padding: 4rem 1rem 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-section h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: #fff;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #fff;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #007bff;
}

.footer-bottom {
    text-align: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .service-grid,
    .features-grid,
    .process-steps,
    .cases-grid,
    .contact-info {
        gap: 1.5rem;
        padding: 0 1rem;
    }

    .hero h1 {
        font-size: 2.5rem;
    }
}

@media (max-width: 992px) {
    .service-grid,
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .features-grid,
    .process-steps {
        grid-template-columns: repeat(2, 1fr);
    }

    .process-steps::before {
        display: none;
    }

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

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-text h1 {
        font-size: 2.5rem;
    }

    .hero-text p {
        font-size: 1.3rem;
    }

    .hero-features {
        justify-content: center;
    }

    .hero-image {
        order: -1;
    }

    .banner-image {
        max-width: 400px;
    }
}

@media (max-width: 768px) {
    .header {
        padding: 0.5rem 0;
    }

    .nav-links {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background-color: rgba(0, 0, 0, 0.95);
        padding: 5rem 1rem 1rem;
        flex-direction: column;
        align-items: center;
        gap: 2rem;
        z-index: 1000;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

    .nav-links.active {
        display: flex;
        opacity: 1;
        visibility: visible;
    }

    .nav-links a {
        font-size: 1.2rem;
        width: 100%;
        text-align: center;
        padding: 1rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        color: #fff;
    }

    .nav-links a:last-child {
        border-bottom: none;
    }

    .mobile-menu-btn {
        display: flex;
        flex-direction: column;
        gap: 6px;
        cursor: pointer;
        z-index: 1001;
        padding: 5px;
    }

    .mobile-menu-btn span {
        display: block;
        width: 25px;
        height: 2px;
        background-color: #fff;
        transition: all 0.3s ease;
    }

    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    body.menu-open {
        overflow: hidden;
    }

    /* 调整主内容区域，避免被固定导航栏遮挡 */
    main {
        margin-top: 60px;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .service-grid,
    .features-grid,
    .process-steps,
    .cases-grid,
    .contact-info {
        grid-template-columns: 1fr;
    }

    .section-wrapper {
        padding: 3rem 0;
    }

    .service-card,
    .feature-card,
    .step,
    .case-card,
    .contact-item {
        padding: 1.5rem;
    }

    .faq-category h3 {
        font-size: 1.5rem;
    }

    .faq-question h4 {
        font-size: 1.1rem;
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }

    .hero {
        padding: 4rem 0;
    }

    .hero-text h1 {
        font-size: 2rem;
    }

    .hero-text p {
        font-size: 1.1rem;
    }

    .banner-image {
        max-width: 300px;
    }
}

@media (max-width: 576px) {
    .hero {
        padding: 3rem 0;
    }

    .hero-text h1 {
        font-size: 1.8rem;
    }

    .hero-text p {
        font-size: 1rem;
    }

    .hero-features span {
        font-size: 0.9rem;
        padding: 0.6rem 1.2rem;
    }

    .banner-image {
        max-width: 250px;
    }

    .section-header h2 {
        font-size: 1.8rem;
    }

    .section-wrapper {
        padding: 2rem 0;
    }

    .service-card h3,
    .feature-card h3,
    .step h3,
    .case-card h3,
    .contact-item h3 {
        font-size: 1.3rem;
    }

    .faq-container {
        padding: 0 0.5rem;
    }

    .faq-category {
        margin-bottom: 2rem;
    }

    .faq-question {
        padding: 1rem;
    }

    .faq-answer {
        padding: 0 1rem;
    }

    .faq-item.active .faq-answer {
        padding: 1rem;
    }

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

    .footer-section {
        margin-bottom: 2rem;
    }

    .footer-bottom {
        font-size: 0.9rem;
    }

    .nav-links {
        padding: 4rem 1rem 1rem;
    }

    .nav-links a {
        font-size: 1.1rem;
        padding: 0.8rem;
    }

    .mobile-menu-btn span {
        width: 22px;
    }
}

/* 打印样式 */
@media print {
    .header,
    .hero,
    .footer {
        display: none;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
    }

    .service-card,
    .feature-card,
    .step,
    .case-card,
    .contact-item {
        break-inside: avoid;
        page-break-inside: avoid;
    }
}

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

.service-card,
.feature-card,
.step,
.case-card,
.contact-item {
    animation: fadeInUp 0.5s ease-out forwards;
}

/* 添加滚动动画 */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}