/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #1a237e;
    --secondary: #283593;
    --accent: #3949ab;
    --gold: #ffb300;
    --bg-light: #f5f7fa;
    --bg-white: #ffffff;
    --text-dark: #1a1a1a;
    --text: #333333;
    --text-light: #666666;
    --border: #e0e0e0;
    --shadow: 0 4px 12px rgba(26, 35, 126, 0.15);
    --shadow-lg: 0 8px 24px rgba(26, 35, 126, 0.2);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.6;
}

.section-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
}

/* 顶部导航栏 */
.header-section {
    background: var(--bg-white);
    border-bottom: 3px solid var(--primary);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo-wrapper {
    display: flex;
    align-items: baseline;
    gap: 12px;
}

.logo-name {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.logo-tag {
    font-size: 13px;
    color: var(--text-light);
    font-weight: 500;
    background: var(--bg-light);
    padding: 4px 12px;
    border-radius: 4px;
}

.nav-wrapper {
    flex: 1;
    display: flex;
    justify-content: center;
}

.nav-items {
    display: flex;
    list-style: none;
    gap: 45px;
}

.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    padding: 10px 0;
    position: relative;
    transition: color 0.3s;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

.nav-button {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-button span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 3px;
    transition: all 0.3s;
}

/* 主横幅 */
.hero-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    padding: 100px 0;
    color: var(--bg-white);
}

.hero-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content {
    flex: 1;
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 24px;
    margin-bottom: 25px;
    color: var(--gold);
    font-weight: 500;
}

.hero-text {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.btn-primary,
.btn-secondary {
    padding: 14px 32px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
}

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

.btn-primary:hover {
    background: #ffa000;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 179, 0, 0.3);
}

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

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

.hero-image {
    flex: 1;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.hero-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* 主容器 */
.content-section {
    padding: 0;
}

/* 介绍区块 */
.intro-section {
    padding: 100px 0;
    background: var(--bg-white);
}

.intro-layout {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: center;
}

.intro-image {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.intro-image img {
    width: 100%;
    height: auto;
    display: block;
}

.intro-content {
    flex: 1;
}

.section-title {
    font-size: 42px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 30px;
}

.section-text {
    font-size: 17px;
    line-height: 1.9;
    color: var(--text-dark);
}

.section-text p {
    margin-bottom: 25px;
}

.section-text p:last-child {
    margin-bottom: 0;
}

/* 服务区块 */
.services-section {
    padding: 100px 0;
    background: var(--bg-light);
}

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

.section-subtitle {
    font-size: 18px;
    color: var(--text-light);
    margin-top: 15px;
}

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

.service-card {
    background: var(--bg-white);
    border-radius: 12px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.card-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--primary);
}

.card-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.card-text {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-light);
    margin-bottom: 20px;
}

.card-link {
    color: var(--primary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s;
}

.card-link:hover {
    color: var(--accent);
}

/* 作品区块 */
.works-section {
    padding: 100px 0;
    background: var(--bg-white);
}

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

.work-item {
    background: var(--bg-light);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s;
    border: 1px solid var(--border);
}

.work-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.work-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.work-image {
    position: relative;
    width: 100%;
    height: 240px;
    overflow: hidden;
    background: var(--text-dark);
}

.work-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.work-item:hover .work-image img {
    transform: scale(1.15);
}

.work-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(26, 35, 126, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.work-item:hover .work-overlay {
    opacity: 1;
}

.play-icon {
    font-size: 56px;
    color: var(--bg-white);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.work-info {
    padding: 30px;
}

.work-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.work-desc {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-light);
}

/* 案例区块 */
.cases-section {
    padding: 100px 0;
    background: var(--bg-light);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
}

.case-item {
    background: var(--bg-white);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.case-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.case-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.case-image {
    width: 100%;
    height: 240px;
    overflow: hidden;
    background: var(--text-dark);
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.case-item:hover .case-image img {
    transform: scale(1.15);
}

.case-content {
    padding: 30px;
}

.case-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.case-desc {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-light);
}

/* 优势特色 */
.features-section {
    padding: 100px 0;
    background: var(--bg-white);
}

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

.feature-box {
    background: var(--bg-light);
    border-radius: 12px;
    padding: 40px 30px;
    text-align: center;
    border: 1px solid var(--border);
    transition: all 0.3s;
}

.feature-box:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 25px;
    background: var(--primary);
    color: var(--bg-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
}

.feature-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.feature-text {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-light);
}

/* 页面标题 */
.page-hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    padding: 80px 0;
    text-align: center;
    color: var(--bg-white);
}

.page-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 15px;
}

.page-subtitle {
    font-size: 20px;
    opacity: 0.9;
}

/* 详情区块 */
.detail-section {
    padding: 80px 0;
    background: var(--bg-white);
}

.detail-layout {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: start;
}

.detail-image {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.detail-image img {
    width: 100%;
    height: auto;
    display: block;
}

.detail-content {
    flex: 1;
}

.detail-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 25px;
}

.detail-text {
    font-size: 17px;
    line-height: 1.8;
    color: var(--text-dark);
}

.detail-text p {
    margin-bottom: 20px;
}

.detail-text p:last-child {
    margin-bottom: 0;
}

/* 关于布局 */
.about-section {
    padding: 80px 0;
    background: var(--bg-white);
}

.about-layout {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-content {
    flex: 1;
}

.about-image {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* 联系区块 */
.contact-section {
    padding: 80px 0;
    background: var(--bg-white);
}

.contact-layout {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-info {
    flex: 1;
}

.contact-text {
    font-size: 17px;
    line-height: 1.8;
    color: var(--text-dark);
    margin-bottom: 40px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.detail-item h3 {
    font-size: 22px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 10px;
}

.detail-item p {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-light);
}

.contact-image {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.contact-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* 信息区块 */
.info-section {
    padding: 60px 0;
    background: var(--bg-light);
}

.info-box {
    background: var(--bg-white);
    padding: 50px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.info-box h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 25px;
}

.info-box p {
    font-size: 17px;
    line-height: 1.8;
    color: var(--text-light);
}

.view-more {
    color: var(--primary);
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: color 0.3s;
}

.view-more:hover {
    color: var(--accent);
}

/* 页脚 */
.footer-section {
    background: var(--text-dark);
    color: var(--bg-white);
    padding: 60px 0 20px;
    margin-top: 50px;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
}

.footer-layout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 50px;
    margin-bottom: 50px;
}

.footer-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 25px;
    color: var(--gold);
}

.footer-text {
    font-size: 15px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.7);
}

.footer-menu {
    list-style: none;
}

.footer-menu li {
    margin-bottom: 12px;
}

.footer-menu a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 15px;
    transition: color 0.3s;
}

.footer-menu a:hover {
    color: var(--gold);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
    }

    .intro-layout,
    .detail-layout,
    .about-layout,
    .contact-layout {
        grid-template-columns: 1fr;
    }

    .hero-title {
        font-size: 42px;
    }
}

@media (max-width: 768px) {
    .nav-items {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        background: var(--bg-white);
        flex-direction: column;
        padding: 30px;
        gap: 0;
        box-shadow: var(--shadow-lg);
        transition: left 0.3s;
        z-index: 99;
    }

    .nav-items.active {
        left: 0;
    }

    .nav-items li {
        width: 100%;
        border-bottom: 1px solid var(--border);
    }

    .nav-link {
        display: block;
        padding: 15px 0;
    }

    .nav-button {
        display: flex;
    }

    .nav-button.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

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

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

    .hero-title {
        font-size: 32px;
    }

    .section-title {
        font-size: 32px;
    }

    .services-grid,
    .works-grid,
    .cases-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }

    .page-title {
        font-size: 32px;
    }

    .services-grid,
    .works-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }
}