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

:root {
    /* 主色调 */
    --primary-color: #0066ff;
    --primary-dark: #0052cc;
    --secondary-color: #00d4ff;
    --accent-color: #ff6b35;
    
    /* 中性色 */
    --dark-bg: #0a0e1a;
    --dark-surface: #1a1f2e;
    --dark-card: #252b3d;
    --light-text: #ffffff;
    --gray-text: #a0a6b8;
    --border-color: #2a3441;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #0066ff 0%, #00d4ff 100%);
    --gradient-bg: linear-gradient(135deg, #0a0e1a 0%, #1a1f2e 100%);
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 102, 255, 0.1);
    --shadow-md: 0 8px 32px rgba(0, 102, 255, 0.15);
    --shadow-lg: 0 16px 64px rgba(0, 102, 255, 0.2);
    
    /* 字体 */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background: var(--gradient-bg);
    color: var(--light-text);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* 粒子背景 */
#particles-js {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-logo {
    height: 40px;
    width: auto;
}

.brand-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--gray-text);
    text-decoration: none;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 8px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--light-text);
    background: rgba(0, 102, 255, 0.1);
}

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

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

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

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--dark-bg);
        border-top: 1px solid var(--border-color);
        flex-direction: column;
        padding: 2rem;
        gap: 1rem;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 999;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-link {
        padding: 12px 0;
        text-align: center;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-link:last-child {
        border-bottom: none;
    }
}

/* 主页横幅 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 100px 0;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 102, 255, 0.1);
    border: 1px solid rgba(0, 102, 255, 0.3);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--secondary-color);
    margin-bottom: 2rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--light-text);
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--gray-text);
    line-height: 1.8;
    margin-bottom: 2.5rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

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

.btn-outline {
    background: transparent;
    color: var(--light-text);
    border: 2px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--primary-color);
    background: rgba(0, 102, 255, 0.1);
}

.hero-stats {
    display: flex;
    gap: 2rem;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--gray-text);
    font-size: 0.9rem;
}

/* 技术圆环 */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.tech-circle {
    position: relative;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    border: 2px solid rgba(0, 102, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
}

.tech-item {
    position: absolute;
    width: 80px;
    height: 80px;
    background: var(--dark-card);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    transition: all 0.3s ease;
    animation: float 3s ease-in-out infinite;
    animation-delay: var(--delay);
}

.tech-item:hover {
    border-color: var(--primary-color);
    transform: scale(1.1);
    background: rgba(0, 102, 255, 0.1);
}

.tech-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.tech-item span {
    font-size: 0.7rem;
    color: var(--gray-text);
}

.tech-item:nth-child(1) { transform: rotate(0deg) translateX(150px) rotate(0deg); }
.tech-item:nth-child(2) { transform: rotate(60deg) translateX(150px) rotate(-60deg); }
.tech-item:nth-child(3) { transform: rotate(120deg) translateX(150px) rotate(-120deg); }
.tech-item:nth-child(4) { transform: rotate(180deg) translateX(150px) rotate(-180deg); }
.tech-item:nth-child(5) { transform: rotate(240deg) translateX(150px) rotate(-240deg); }
.tech-item:nth-child(6) { transform: rotate(300deg) translateX(150px) rotate(-300deg); }

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

/* 通用区域样式 */
section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--light-text);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--gray-text);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* 关于我们区域 */
.about-section {
    background: var(--dark-surface);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.about-card {
    background: var(--dark-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.about-card:hover {
    transform: translateX(10px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.card-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.card-icon i {
    font-size: 1.2rem;
    color: white;
}

.about-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--light-text);
}

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

.about-visual {
    display: flex;
    justify-content: center;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    max-width: 300px;
}

.tech-tag {
    background: var(--dark-card);
    border: 1px solid var(--border-color);
    padding: 12px 16px;
    border-radius: 8px;
    text-align: center;
    color: var(--gray-text);
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.tech-tag:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* 服务区域 - 横向布局 */
.services-grid {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.service-card {
    background: var(--dark-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    gap: 2rem;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.service-card:hover::before {
    transform: scaleX(1);
}

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

.service-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.service-icon i {
    font-size: 2.2rem;
    color: white;
}

.service-content {
    flex: 1;
    display: flex;
    gap: 2rem;
}

.service-info {
    flex: 2;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.8rem;
    color: var(--light-text);
}

.service-card > p,
.service-info > p {
    color: var(--gray-text);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.service-details {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.service-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
}

.service-list li {
    color: var(--gray-text);
    padding-left: 1rem;
    position: relative;
    font-size: 0.9rem;
}

.service-list li::before {
    content: '•';
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

.service-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-badge {
    background: rgba(0, 102, 255, 0.1);
    color: var(--primary-color);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    border: 1px solid rgba(0, 102, 255, 0.2);
}

/* 解决方案区域 */
.solutions-section {
    background: var(--dark-surface);
}

.solution-content {
    max-width: 800px;
    margin: 0 auto;
}

.tab-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.tab-btn {
    background: transparent;
    border: 2px solid var(--border-color);
    color: var(--gray-text);
    padding: 12px 24px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.tab-btn.active,
.tab-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(0, 102, 255, 0.1);
}

.tab-content {
    position: relative;
}

.tab-panel {
    display: none;
    animation: fadeInUp 0.5s ease;
}

.tab-panel.active {
    display: block;
}

.solution-card {
    background: var(--dark-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2.5rem;
}

.solution-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--light-text);
}

.solution-card p {
    color: var(--gray-text);
    line-height: 1.6;
    margin-bottom: 2rem;
}

.solution-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--gray-text);
}

.feature-item i {
    color: var(--primary-color);
    font-size: 0.9rem;
}

/* 联系我们区域 */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

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

.contact-card {
    background: var(--dark-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.contact-card:hover {
    transform: translateY(-3px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.contact-card.full-width {
    grid-column: 1 / -1;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.contact-icon i {
    font-size: 1.2rem;
    color: white;
}

.contact-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--light-text);
}

.contact-card p {
    color: var(--gray-text);
    line-height: 1.5;
    margin-bottom: 0.5rem;
}

.contact-note {
    font-size: 0.9rem;
    color: var(--primary-color);
}

/* 联系表单 */
.contact-form {
    background: var(--dark-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2.5rem;
}

.contact-form h3 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: var(--light-text);
    text-align: center;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    background: var(--dark-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 16px;
    color: var(--light-text);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--gray-text);
}

.form-group select {
    cursor: pointer;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* 页脚 - 横向布局 */
.footer {
    background: var(--dark-bg);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0 1rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 3rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex: 1;
}

.footer-logo {
    height: 40px;
    width: auto;
}

.brand-info h3 {
    color: var(--light-text);
    font-size: 1.2rem;
    margin-bottom: 0.3rem;
}

.brand-info p {
    color: var(--gray-text);
    line-height: 1.4;
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 4rem;
    align-items: flex-start;
}

.footer-section {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.footer-section h4 {
    color: var(--light-text);
    margin-bottom: 0.8rem;
    font-size: 1rem;
    font-weight: 600;
}

.footer-section-horizontal {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    flex-wrap: wrap;
}

.footer-section-horizontal h4 {
    margin-bottom: 0;
    margin-right: 0.5rem;
}

.footer-section a,
.footer-section span {
    color: var(--gray-text);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
    white-space: nowrap;
}

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

.footer-section-horizontal a,
.footer-section-horizontal span {
    position: relative;
}

.footer-section-horizontal a:not(:last-child)::after,
.footer-section-horizontal span:not(:last-child)::after {
    content: '·';
    color: var(--border-color);
    margin-left: 1.5rem;
    position: absolute;
    right: -1rem;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-info {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.footer-info p {
    color: var(--gray-text);
    font-size: 0.85rem;
    margin: 0;
}

.beian-link {
    color: var(--gray-text);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color 0.3s ease;
    background: rgba(0, 102, 255, 0.1);
    padding: 6px 12px;
    border-radius: 6px;
    border: 1px solid rgba(0, 102, 255, 0.2);
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

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

.beian-link i {
    color: var(--primary-color);
    font-size: 0.8rem;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* 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 forwards;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
    
    .tech-circle {
        width: 300px;
        height: 300px;
    }
    
    .tech-item:nth-child(1) { transform: rotate(0deg) translateX(120px) rotate(0deg); }
    .tech-item:nth-child(2) { transform: rotate(60deg) translateX(120px) rotate(-60deg); }
    .tech-item:nth-child(3) { transform: rotate(120deg) translateX(120px) rotate(-120deg); }
    .tech-item:nth-child(4) { transform: rotate(180deg) translateX(120px) rotate(-180deg); }
    .tech-item:nth-child(5) { transform: rotate(240deg) translateX(120px) rotate(-240deg); }
    .tech-item:nth-child(6) { transform: rotate(300deg) translateX(120px) rotate(-300deg); }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .service-card {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
    }
    
    .service-content {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .service-list {
        grid-template-columns: 1fr;
    }
    
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .tab-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 2rem;
    }
    
    .footer-brand {
        justify-content: center;
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 1.5rem;
        align-items: center;
    }
    
    .footer-section-horizontal {
        flex-direction: column;
        gap: 0.5rem;
        align-items: center;
        text-align: center;
    }
    
    .footer-section-horizontal h4 {
        margin-bottom: 0.5rem;
        margin-right: 0;
    }
    
    .footer-section-horizontal a::after,
    .footer-section-horizontal span::after {
        display: none;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .hero-visual {
        display: none;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    section {
        padding: 60px 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .service-card,
    .about-card,
    .contact-card {
        padding: 1.5rem;
    }
    
    .solution-features {
        grid-template-columns: 1fr;
    }
}