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

:root {
    --primary-color: #0066ff;
    --primary-dark: #0052cc;
    --primary-light: #3385ff;
    --secondary-color: #6366f1;
    --accent-color: #8b5cf6;
    --text-dark: #1a202c;
    --text-gray: #4a5568;
    --text-light: #718096;
    --bg-white: #ffffff;
    --bg-gray: #f7fafc;
    --bg-light: #edf2f7;
    --border-color: #e2e8f0;
    --gradient-primary: linear-gradient(135deg, #0066ff 0%, #6366f1 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --shadow-md: 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', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-white);
    overflow-x: hidden;
}

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

/* 顶部导航栏 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: all 0.3s ease;
}

.header.scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.2rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    cursor: pointer;
    letter-spacing: -0.5px;
}

.logo img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.logo-text {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-dark);
    white-space: nowrap;
}

.nav-menu {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    font-size: 0.95rem;
}

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

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

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

.cta-btn {
    background: var(--gradient-primary);
    color: white;
    border: none;
    display: inline-block;
    text-decoration: none;
    padding: 0.75rem 1.8rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
    font-size: 0.95rem;
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 102, 255, 0.4);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

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

/* 首屏Hero区 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 140px 20px 100px;
    overflow: hidden;
    background: linear-gradient(180deg, #ffffff 0%, #f7fafc 100%);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.4;
    z-index: 0;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(90deg, rgba(0, 102, 255, 0.05) 1px, transparent 1px),
        linear-gradient(rgba(0, 102, 255, 0.05) 1px, transparent 1px);
    background-size: 50px 50px;
}

.hero-bg::after {
    content: '';
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.8rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 2rem;
    color: var(--text-dark);
    letter-spacing: -1px;
}

.hero-title::after {
    content: '';
    display: block;
    width: 100px;
    height: 5px;
    background: var(--gradient-primary);
    margin: 1.5rem auto 0;
    border-radius: 3px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-gray);
    margin-bottom: 3rem;
    line-height: 1.8;
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 1.1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
    cursor: pointer;
    border: none;
    font-size: 1.05rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 102, 255, 0.4);
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
}

.btn-block {
    width: 100%;
}

/* 通用区块样式 */
section {
    padding: 100px 20px;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 5rem;
}

.section-title {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
    letter-spacing: -0.5px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.15rem;
    color: var(--text-gray);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
    margin-top: 2rem;
}

/* 关于我们 */
.about {
    background: var(--bg-gray);
}

.about-content {
    max-width: 1000px;
    margin: 0 auto 5rem;
}

.about-text {
    font-size: 1.15rem;
    line-height: 2;
    color: var(--text-gray);
    margin-bottom: 2rem;
    text-align: center;
}

.capabilities-title {
    font-size: 2.2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 4rem;
    color: var(--text-dark);
}

.capabilities-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

@media (max-width: 1024px) {
    .capabilities-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .capabilities-grid {
        grid-template-columns: 1fr;
    }
}

.capability-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.capability-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.capability-icon {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: rgba(0, 102, 255, 0.08);
    border-radius: 8px;
}

.capability-card h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: var(--text-dark);
    line-height: 1.4;
    width: 100%;
}

.capability-card p {
    color: var(--text-gray);
    line-height: 1.6;
    font-size: 0.95rem;
    width: 100%;
}

/* 核心服务 */
.services {
    background: white;
}

.services-list {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.service-card {
    background: var(--bg-gray);
    border-radius: 20px;
    padding: 3rem;
    position: relative;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.service-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-xl);
    transform: translateY(-5px);
}

.service-number {
    position: absolute;
    top: 2.5rem;
    right: 2.5rem;
    font-size: 5rem;
    font-weight: 900;
    color: rgba(0, 102, 255, 0.08);
    line-height: 1;
}

.service-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.service-intro {
    font-size: 1.1rem;
    line-height: 1.9;
    color: var(--text-gray);
    margin-bottom: 2.5rem;
}

.service-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.service-section h4 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.service-section ul {
    list-style: none;
    padding: 0;
}

.service-section li {
    padding: 0.6rem 0;
    padding-left: 1.8rem;
    position: relative;
    color: var(--text-gray);
    line-height: 1.7;
}

.service-section li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.1rem;
}

.service-section p {
    color: var(--text-gray);
    line-height: 1.8;
}

/* 核心优势 */
.advantages {
    background: var(--bg-gray);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1.5rem;
}

@media (max-width: 1200px) {
    .advantages-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .advantages-grid {
        grid-template-columns: 1fr;
    }
}

.advantage-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.advantage-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.advantage-icon {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: rgba(0, 102, 255, 0.08);
    border-radius: 8px;
}

.advantage-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: var(--text-dark);
    line-height: 1.4;
    width: 100%;
}

.advantage-card p {
    color: var(--text-gray);
    line-height: 1.6;
    font-size: 0.95rem;
    width: 100%;
}

/* 行业解决方案 */
.solutions {
    background: white;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

@media (max-width: 768px) {
    .solutions-grid {
        grid-template-columns: 1fr;
    }
}

.solution-card {
    background: var(--bg-gray);
    padding: 2rem;
    border-radius: 16px;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.solution-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
    transform: translateY(-8px);
    background: white;
}

.solution-icon {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: rgba(0, 102, 255, 0.08);
    border-radius: 8px;
}

.solution-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: var(--text-dark);
    width: 100%;
}

.solution-card p {
    color: var(--text-gray);
    line-height: 1.6;
    font-size: 0.95rem;
    width: 100%;
}

/* 合作流程 */
.process {
    background: var(--bg-gray);
}

.process-timeline {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1.5rem;
    position: relative;
}

@media (max-width: 1200px) {
    .process-timeline {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .process-timeline {
        grid-template-columns: 1fr;
    }
}

.process-step {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.process-step:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.step-number {
    width: 48px;
    height: 48px;
    background: rgba(0, 102, 255, 0.08);
    color: var(--primary-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    box-shadow: none;
}

.process-step h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: var(--text-dark);
    width: 100%;
}

.process-step p {
    color: var(--text-gray);
    line-height: 1.6;
    font-size: 0.95rem;
    width: 100%;
}

/* 联系我们 */
.contact {
    background: white;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 4rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info h3,
.contact-form h3 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.info-item {
    display: flex;
    flex-direction: column;
    margin-bottom: 1.8rem;
    padding-bottom: 1.8rem;
    border-bottom: 1px solid var(--border-color);
}

.info-item:last-child {
    border-bottom: none;
}

.info-label {
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.info-value {
    color: var(--text-gray);
    font-size: 1.05rem;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    font-family: inherit;
    background: var(--bg-gray);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: white;
    box-shadow: 0 0 0 4px rgba(0, 102, 255, 0.1);
}

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

/* 网站页脚 */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 4rem 20px 2rem;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--primary-light);
}

.footer-logo img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.footer-logo .logo-text {
    color: white;
}

.footer-desc {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.footer-copyright,
.footer-icp,
.footer-beian {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.footer-beian a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-col h4 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.footer-links,
.footer-contact {
    list-style: none;
}

.footer-links li,
.footer-contact li {
    margin-bottom: 0.8rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-contact li {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

/* 联系电话快捷按钮 */
.phone-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--gradient-primary);
    color: white;
    padding: 1rem 1.8rem;
    border-radius: 50px;
    box-shadow: 0 4px 20px rgba(0, 102, 255, 0.4);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    transition: all 0.3s ease;
    z-index: 999;
}

.phone-float:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(0, 102, 255, 0.5);
}

.phone-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.phone-icon img {
    width: 24px;
    height: 24px;
}

.phone-text {
    font-weight: 600;
    font-size: 1rem;
    display: flex;
    align-items: center;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 1.5rem;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        gap: 0;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-link {
        padding: 1rem;
        width: 100%;
        text-align: center;
        border-bottom: 1px solid var(--border-color);
    }

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

    .cta-btn {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-subtitle {
        font-size: 1.05rem;
    }

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

    .section-subtitle {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .capabilities-grid,
    .advantages-grid,
    .solutions-grid,
    .process-timeline {
        grid-template-columns: 1fr;
    }

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

    .service-number {
        font-size: 3rem;
        top: 2rem;
        right: 2rem;
    }

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

    .phone-float {
        bottom: 20px;
        right: 20px;
        left: 20px;
        justify-content: center;
    }

    section {
        padding: 60px 20px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 120px 20px 80px;
    }

    .service-card,
    .capability-card,
    .advantage-card,
    .solution-card,
    .process-step {
        padding: 2rem;
    }

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

    .section-title {
        font-size: 1.6rem;
    }
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 404 页面 */
.header-static {
    position: sticky;
}

.page-404 {
    min-height: calc(100vh - 88px);
    display: flex;
    align-items: center;
    padding: 60px 20px;
    background: linear-gradient(180deg, #ffffff 0%, #f7fafc 100%);
}

.page-404-card {
    max-width: 760px;
    margin: 0 auto;
    text-align: center;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 3.5rem 2.5rem;
    box-shadow: var(--shadow-lg);
}

.page-404-code {
    font-size: 5rem;
    font-weight: 900;
    line-height: 1;
    letter-spacing: -2px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 1rem;
}

.page-404-title {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.page-404-desc {
    color: var(--text-gray);
    font-size: 1.05rem;
    line-height: 1.8;
    margin: 0 auto 2rem;
    max-width: 560px;
}

.page-404-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

@media (max-width: 480px) {
    .page-404-card {
        padding: 2.5rem 1.5rem;
    }
    .page-404-code {
        font-size: 4rem;
    }
    .page-404-title {
        font-size: 1.8rem;
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}