* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-color: #ffffff;
    --bg-alt: #f9fafb;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    justify-content: center;
}

.brand-logo {
    height: 50px;
    width: auto;
    max-width: 200px;
    object-fit: contain;
    transition: transform 0.3s ease;
    display: block;
}

.brand-logo:hover {
    transform: scale(1.05);
}

.brand-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.brand-name {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    line-height: 1.2;
}

.brand-tagline {
    font-size: 0.75rem;
    color: var(--text-light);
    font-weight: normal;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

.nav-menu a:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-color);
    transition: all 0.3s ease;
    border-radius: 2px;
}

/* 英雄区域 */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: var(--bg-gradient);
    color: white;
    position: relative;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    max-width: 900px;
    padding: 2rem;
    position: relative;
    z-index: 1;
}

.hero-logo {
    max-width: 300px;
    width: 100%;
    height: auto;
    margin-bottom: 2rem;
    animation: fadeInUp 0.6s ease;
    filter: drop-shadow(0 4px 20px rgba(0, 0, 0, 0.3));
}

.hero-title {
    font-size: 4rem;
    font-weight: bold;
    margin-bottom: 1rem;
    animation: fadeInUp 0.8s ease;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    opacity: 0.95;
    animation: fadeInUp 1s ease;
    font-weight: 500;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
    animation: fadeInUp 1.2s ease;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1.4s ease;
}

.hero-scroll {
    position: absolute;
    bottom: 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    animation: bounce 2s infinite;
    cursor: pointer;
}

.hero-scroll span {
    font-size: 0.9rem;
    opacity: 0.8;
}

.scroll-arrow {
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scroll-arrow i {
    font-size: inherit;
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: #f8f9fa;
}

.btn-outline {
    background: transparent;
    color: white;
    border-color: white;
}

.btn-outline:hover {
    background: white;
    color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
    text-align: center;
}

/* 章节 */
.section {
    padding: 100px 0;
}

.section-alt {
    background: var(--bg-alt);
}

.section-title {
    font-size: 2.8rem;
    text-align: center;
    margin-bottom: 4rem;
    color: var(--text-color);
    font-weight: bold;
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
}

/* 关于我们 */
.about-content {
    display: grid;
    gap: 3rem;
}

.about-main {
    max-width: 900px;
    margin: 0 auto;
}

.about-text {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.8;
    text-align: justify;
}

.about-text strong {
    color: var(--primary-color);
    font-weight: 600;
}

.about-mission {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.mission-card {
    text-align: center;
    padding: 2.5rem 2rem;
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-color);
}

.mission-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.mission-icon {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.mission-icon i {
    font-size: inherit;
}

.mission-card h3 {
    margin-bottom: 0.8rem;
    color: var(--text-color);
    font-size: 1.3rem;
}

.mission-card p {
    color: var(--text-light);
    line-height: 1.6;
}

/* 企业资质 */
.about-qualifications {
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 2px solid var(--border-color);
}

.qualifications-title {
    text-align: center;
    font-size: 1.8rem;
    color: var(--text-color);
    margin-bottom: 2.5rem;
    font-weight: 600;
}

.qualifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.qualification-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 2rem;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-color);
}

.qualification-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.qualification-icon {
    font-size: 2rem;
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    color: white;
}

.qualification-icon i {
    font-size: 2rem;
}

.qualification-content {
    flex: 1;
}

.qualification-content h4 {
    font-size: 1.3rem;
    color: var(--text-color);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.qualification-content p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* 业务版图 */
.business-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
}

.business-item {
    text-align: center;
    padding: 2rem 1.5rem;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.business-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.business-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.business-icon i {
    font-size: inherit;
}

.business-item h3 {
    margin-bottom: 0.8rem;
    color: var(--text-color);
    font-size: 1.2rem;
}

.business-item p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* 产品服务 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
}

.product-card {
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-color);
    position: relative;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.product-card.featured {
    border: 2px solid var(--primary-color);
}

.product-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--primary-color);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    z-index: 1;
}

.product-header {
    padding: 2.5rem 2rem 1.5rem;
    text-align: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.product-card.featured .product-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.product-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-icon i {
    font-size: inherit;
}

.product-card.featured .product-icon {
    color: white;
}

.product-header h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.product-card.featured .product-header h3 {
    color: white;
}

.product-subtitle {
    font-size: 0.9rem;
    color: var(--text-light);
    font-weight: 500;
    letter-spacing: 1px;
}

.product-card.featured .product-subtitle {
    color: rgba(255, 255, 255, 0.9);
}

.product-body {
    padding: 2rem;
}

.product-body p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.8;
    text-align: justify;
}

.product-features {
    list-style: none;
    padding: 0;
}

.product-features li {
    padding: 0.8rem 0;
    color: var(--text-color);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
}

.product-features li:last-child {
    border-bottom: none;
}

/* 联系我们 */
.contact-content {
    max-width: 1100px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-info-center {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    max-width: 900px;
    margin: 0 auto;
}

.contact-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.contact-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-icon i {
    font-size: inherit;
}

.contact-card h3 {
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-size: 1.2rem;
}

.contact-card p {
    color: var(--text-light);
    line-height: 1.6;
}

.contact-card a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-card a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

.contact-form {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
}

.contact-form h3 {
    margin-bottom: 1.5rem;
    color: var(--text-color);
    font-size: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    background: var(--bg-alt);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    background: white;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* 页脚 */
.footer {
    background: var(--text-color);
    color: white;
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-brand h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: white;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
}

.footer-links h4,
.footer-contact h4 {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

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

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

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: white;
}

.footer-contact p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

.footer-bottom p {
    margin-bottom: 0.5rem;
}

.beian {
    margin-top: 0.5rem;
}

.beian a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    transition: color 0.3s ease;
}

.beian a:hover {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: underline;
}

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* 响应式设计 */
@media (max-width: 968px) {
    .products-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
        gap: 1rem;
    }

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

    .brand-logo {
        height: 40px;
        max-width: 150px;
    }

    .hero-logo {
        max-width: 200px;
        margin-bottom: 1.5rem;
    }

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

    .hero-subtitle {
        font-size: 1.4rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .section {
        padding: 60px 0;
    }

    .about-mission {
        grid-template-columns: 1fr;
    }

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

    .qualification-item {
        flex-direction: column;
        text-align: center;
    }

    .qualification-icon {
        width: 70px;
        height: 70px;
        font-size: 2.5rem;
    }

    .business-content {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    }

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

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

    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }

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

@media (max-width: 480px) {
    .brand-logo {
        height: 35px;
        max-width: 120px;
    }

    .hero-logo {
        max-width: 150px;
        margin-bottom: 1rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .product-header,
    .product-body {
        padding: 1.5rem;
    }

    .contact-form {
        padding: 1.5rem;
    }
}