/* 全局样式 */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --text-color: #333;
    --light-text: #666;
    --white: #fff;
    --background-color: #f8f9fa;
    --border-color: #e9ecef;
    --shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    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: var(--text-color);
    background-color: var(--white);
}

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

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--white);
    box-shadow: var(--shadow);
    z-index: 1000;
    padding: 15px 0;
}

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

.nav-brand a {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-link {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--secondary-color);
}

.mobile-menu {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    padding: 5px;
    z-index: 1002;
}

.mobile-menu span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

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

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

.mobile-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* 移动端导航 */
.mobile-nav {
    position: fixed;
    top: 0;
    right: -300px;
    width: 300px;
    height: 100vh;
    background-color: var(--white);
    box-shadow: var(--shadow);
    z-index: 1001;
    transition: var(--transition);
    padding: 80px 20px 20px;
    overflow-y: auto;
}

.mobile-nav.active {
    right: 0;
}

.mobile-nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mobile-nav-link {
    display: block;
    padding: 15px 0;
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
    font-size: 16px;
}

.mobile-nav-link:hover {
    color: var(--secondary-color);
    padding-left: 10px;
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.overlay.active {
    display: block;
    opacity: 1;
}

/* 英雄区域 */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, var(--background-color) 0%, var(--primary-color) 100%);
    position: relative;
    overflow: hidden;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.hero-text {
    z-index: 2;
}

.hero-image {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    transform: perspective(1000px) rotateY(-5deg);
    transition: transform 0.3s ease;
    height: 500px; /* 设置固定高度 */
}

.hero-image:hover {
    transform: perspective(1000px) rotateY(0deg);
}

.hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 20px;
    transition: transform 0.3s ease;
}

.hero-image:hover .hero-img {
    transform: scale(1.05);
}

.hero-image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.7));
    display: flex;
    align-items: flex-end;
    padding: 30px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.hero-image:hover .hero-image-overlay {
    opacity: 1;
}

.overlay-content {
    color: var(--white);
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.hero-image:hover .overlay-content {
    transform: translateY(0);
}

.overlay-content h3 {
    font-size: 24px;
    margin-bottom: 10px;
    color: var(--white);
}

.overlay-content p {
    font-size: 16px;
    margin-bottom: 20px;
    color: var(--white);
}

.overlay-features {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.overlay-feature {
    display: flex;
    align-items: center;
    gap: 10px;
}

.feature-icon {
    color: var(--accent-color);
    font-weight: bold;
}

/* 英雄区域统计 */
.hero-stats {
    display: flex;
    gap: 30px;
    margin-top: 30px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: bold;
    color: var(--white);
    margin-bottom: 5px;
}

.stat-text {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
}

/* 英雄图片覆盖层特性 */
.overlay-features {
    margin-top: 20px;
}

.overlay-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.overlay-feature .feature-icon {
    color: var(--secondary-color);
    font-size: 18px;
}

/* 特性列表 */
.feature-list {
    list-style: none;
    margin-top: 15px;
}

.feature-list li {
    color: var(--light-text);
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
}

.feature-list li:before {
    content: "•";
    color: var(--secondary-color);
    position: absolute;
    left: 0;
}

/* 步骤详情 */
.step-details {
    list-style: none;
    margin-top: 15px;
}

.step-details li {
    color: var(--light-text);
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
}

.step-details li:before {
    content: "→";
    color: var(--secondary-color);
    position: absolute;
    left: 0;
}

/* 服务特点 */
.features {
    padding: 80px 0;
    background-color: var(--background-color);
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.section-header p {
    color: var(--light-text);
    font-size: 18px;
}

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

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

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.feature-card p {
    color: var(--light-text);
    margin-bottom: 20px;
}

/* 服务流程 */
.process {
    padding: 80px 0;
    background-color: var(--white);
}

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

.process-step {
    text-align: center;
    padding: 30px;
    background-color: var(--background-color);
    border-radius: 10px;
    transition: var(--transition);
}

.process-step:hover {
    transform: translateY(-5px);
}

.step-number {
    font-size: 48px;
    font-weight: bold;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.process-step h3 {
    font-size: 20px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.process-step p {
    color: var(--light-text);
    margin-bottom: 20px;
}

/* 成功案例 */
.cases {
    padding: 80px 0;
    background-color: var(--background-color);
}

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

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

.case-card:hover {
    transform: translateY(-5px);
}

.case-icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.case-card h3 {
    font-size: 20px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.case-card p {
    color: var(--light-text);
    margin-bottom: 20px;
}

.case-stats {
    display: flex;
    gap: 20px;
}

.case-stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 24px;
    font-weight: bold;
    color: var(--secondary-color);
}

.stat-label {
    font-size: 14px;
    color: var(--light-text);
}

/* 服务优势 */
.advantages {
    padding: 80px 0;
    background-color: var(--white);
}

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

.advantage-card {
    background-color: var(--background-color);
    padding: 30px;
    border-radius: 10px;
    transition: var(--transition);
}

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

.advantage-card h3 {
    font-size: 20px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.advantage-card ul {
    list-style: none;
}

.advantage-card li {
    color: var(--light-text);
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
}

.advantage-card li:before {
    content: "✓";
    color: var(--secondary-color);
    position: absolute;
    left: 0;
}

/* 客户评价 */
.testimonials {
    padding: 80px 0;
    background-color: var(--background-color);
}

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

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

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

.testimonial-content p {
    color: var(--text-color);
    font-style: italic;
    line-height: 1.6;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 15px;
}

.author-info h4 {
    color: var(--primary-color);
    margin-bottom: 5px;
}

.author-info p {
    color: var(--light-text);
    font-size: 14px;
}

/* 联系我们 */
.contact {
    padding: 80px 0;
    background-color: var(--white);
}

.contact-content {
    max-width: 1000px;
    margin: 0 auto;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.contact-card {
    background-color: var(--background-color);
    padding: 30px;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.contact-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
    opacity: 0;
    transition: var(--transition);
}

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

.contact-icon {
    font-size: 40px;
    margin-bottom: 20px;
    color: var(--secondary-color);
}

.contact-text h3 {
    color: var(--primary-color);
    font-size: 20px;
    margin-bottom: 10px;
}

.contact-text p {
    color: var(--light-text);
    margin-bottom: 5px;
}

.contact-detail {
    font-size: 14px;
    color: var(--secondary-color);
    margin-top: 5px;
}

.contact-note {
    text-align: center;
    padding: 20px;
    background-color: var(--background-color);
    border-radius: 10px;
    margin-top: 30px;
}

.contact-note p {
    color: var(--accent-color);
    font-size: 16px;
    font-weight: 500;
}

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

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 50px;
    margin-bottom: 40px;
}

.footer-info h3 {
    font-size: 24px;
    margin-bottom: 15px;
}

.footer-info p {
    color: rgba(255, 255, 255, 0.7);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.footer-link-group h4 {
    font-size: 18px;
    margin-bottom: 20px;
}

.footer-link-group a {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    margin-bottom: 10px;
    transition: var(--transition);
}

.footer-link-group a:hover {
    color: var(--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, 0.7);
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .container {
        max-width: 960px;
    }
}

@media (max-width: 992px) {
    .container {
        max-width: 720px;
    }

    .nav-menu {
        display: none;
    }

    .mobile-menu {
        display: flex;
    }

    .mobile-nav {
        display: block;
    }

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

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

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

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .hero-image {
        max-width: 600px;
        margin: 0 auto;
        transform: none;
        height: 400px; /* 移动端调整高度 */
    }

    .hero-image:hover {
        transform: none;
    }

    .hero-image-overlay {
        opacity: 1;
    }

    .overlay-content {
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    .container {
        max-width: 540px;
    }

    .hero-title h1 {
        font-size: 36px;
    }

    .section-header h2 {
        font-size: 28px;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 20px;
    }

    .contact-card {
        padding: 20px;
    }

    .contact-icon {
        font-size: 32px;
        margin-bottom: 15px;
    }

    .contact-text h3 {
        font-size: 18px;
    }

    .contact-detail {
        font-size: 13px;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-image {
        max-width: 100%;
        height: 300px; /* 平板端调整高度 */
    }
}

@media (max-width: 576px) {
    .hero-badges {
        flex-direction: column;
        align-items: center;
    }

    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }

    .feature-card,
    .process-step,
    .case-card,
    .advantage-card,
    .testimonial-card,
    .contact-card {
        padding: 20px;
    }

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

    .hero-image {
        height: 250px; /* 手机端调整高度 */
    }

    .mobile-nav {
        width: 100%;
        right: -100%;
    }

    .mobile-nav-link {
        padding: 20px 0;
        font-size: 18px;
        text-align: center;
    }

    .mobile-nav-link:hover {
        padding-left: 0;
        background-color: var(--background-color);
    }
}