:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #0f172a;
    --light: #f8fafc;
    --gray: #94a3b8;
    --accent: #f59e0b;
    --success: #10b981;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    color: #333;
    line-height: 1.6;
    background-color: #f9fafb;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
header {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 40px;
    margin-right: 10px;
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
}

.logo-text span {
    color: var(--secondary);
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--secondary);
    font-weight: 500;
    transition: color 0.3s;
    font-size: 16px;
    position: relative;
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.contact-btn {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    border: none;
    padding: 10px 25px;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 15px;
    box-shadow: 0 5px 15px rgba(37, 99, 235, 0.3);
}

.contact-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
}

/* 移动端导航样式 */
.mobile-toggle {
    display: none;
    cursor: pointer;
    font-size: 24px;
    color: var(--secondary);
}

.mobile-nav {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background: white;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    z-index: 999;
    padding: 20px 0;
}

.mobile-nav.active {
    display: block;
}

.mobile-nav-links {
    list-style: none;
}

.mobile-nav-links li {
    margin-bottom: 15px;
    text-align: center;
}

.mobile-nav-links a {
    text-decoration: none;
    color: var(--secondary);
    font-weight: 500;
    font-size: 18px;
    display: block;
    padding: 10px;
    transition: background 0.3s;
}

.mobile-nav-links a:hover,
.mobile-nav-links a.active {
    color: var(--primary);
    background: rgba(37, 99, 235, 0.05);
}

/* Hero区域样式 */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: rgba(37, 99, 235, 0.1);
}

.hero::after {
    content: "";
    position: absolute;
    bottom: -150px;
    left: -100px;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: rgba(37, 99, 235, 0.05);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-text h1 {
    font-size: 48px;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--secondary);
}

.hero-text h1 span {
    color: var(--primary);
}

.hero-text p {
    font-size: 18px;
    color: #475569;
    margin-bottom: 30px;
}

.hero-btns {
    display: flex;
    gap: 15px;
}

.btn {
    padding: 12px 28px;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}

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

.btn-outline:hover {
    background: rgba(37, 99, 235, 0.1);
}

.hero-img {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    height: 400px;
    background: linear-gradient(45deg, #bfdbfe, #dbeafe);
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-img-content {
    text-align: center;
    color: var(--primary);
    padding: 30px;
}

.hero-img-content i {
    font-size: 100px;
    margin-bottom: 20px;
}

.hero-img-content h3 {
    font-size: 24px;
    margin-bottom: 10px;
}

/* 核心功能区域 */
.features {
    padding: 100px 0;
    background: white;
}

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

.section-title h2 {
    font-size: 36px;
    color: var(--secondary);
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: "";
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--primary);
    border-radius: 2px;
}

.section-title p {
    color: var(--gray);
    max-width: 700px;
    margin: 20px auto 0;
}

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

.feature-card {
    background: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s, box-shadow 0.3s;
    border-top: 3px solid var(--primary);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.feature-icon {
    font-size: 50px;
    color: var(--primary);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--secondary);
}

.feature-card p {
    color: #64748b;
}

/* 解决方案区域 */
.solutions {
    padding: 100px 0;
    background: #f1f5f9;
}

.solutions-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 25px;
    background: white;
    border: none;
    border-radius: 5px;
    margin: 0 10px 10px;
    cursor: pointer;
    font-weight: 600;
    color: var(--secondary);
    transition: all 0.3s;
    box-shadow: 0 3px 10px rgba(0,0,0,0.05);
}

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

.tab-content {
    display: none;
}

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

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

.solution-text h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--secondary);
}

.solution-text p {
    color: #64748b;
    margin-bottom: 20px;
    line-height: 1.8;
}

.solution-list {
    list-style: none;
}

.solution-list li {
    padding: 10px 0;
    display: flex;
    align-items: center;
}

.solution-list li::before {
    content: "✓";
    color: var(--success);
    margin-right: 15px;
    font-size: 18px;
    font-weight: bold;
}

.solution-img {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
    height: 300px;
    background: linear-gradient(45deg, #3b82f6, #60a5fa);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

/* 技术优势区域 */
.advantages {
    padding: 100px 0;
    background: white;
}

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

.advantage-card {
    background: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s;
    text-align: center;
    border: 1px solid rgba(148, 163, 184, 0.1);
}

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

.advantage-icon {
    font-size: 50px;
    color: var(--primary);
    margin-bottom: 20px;
}

.advantage-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--secondary);
}

.advantage-card p {
    color: #64748b;
}

/* 操作演示区域 */
.demo {
    padding: 100px 0;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: white;
}

.demo-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.demo-video {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
    position: relative;
    height: 350px;
    background: rgba(0,0,0,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
}

.demo-video i {
    font-size: 80px;
    color: white;
    opacity: 0.7;
}

.demo-text h2 {
    font-size: 36px;
    margin-bottom: 20px;
    color: white;
}

.demo-text p {
    margin-bottom: 20px;
    color: #cbd5e1;
    font-size: 18px;
    line-height: 1.8;
}

.demo-steps {
    list-style: none;
    margin-top: 30px;
}

.demo-steps li {
    padding: 15px 0;
    border-bottom: 1px solid rgba(148, 163, 184, 0.2);
    display: flex;
    align-items: center;
    font-size: 18px;
}

.demo-steps li:last-child {
    border-bottom: none;
}

.demo-steps li::before {
    content: "→";
    color: var(--accent);
    margin-right: 15px;
    font-size: 20px;
    font-weight: bold;
}

/* 关于我们区域 */
.about {
    padding: 100px 0;
    background: white;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text h2 {
    font-size: 36px;
    margin-bottom: 20px;
    color: var(--secondary);
}

.about-text p {
    margin-bottom: 20px;
    color: #64748b;
    font-size: 18px;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: var(--light);
    border-radius: 10px;
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 10px;
}

.stat-text {
    color: #64748b;
}

.about-img {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    height: 400px;
    background: linear-gradient(45deg, #bfdbfe, #dbeafe);
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-img-content {
    text-align: center;
    color: var(--primary);
    padding: 30px;
}

.about-img-content i {
    font-size: 100px;
    margin-bottom: 20px;
}

/* CTA区域 */
.cta {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    text-align: center;
}

.cta h2 {
    font-size: 42px;
    margin-bottom: 20px;
}

.cta p {
    font-size: 20px;
    max-width: 700px;
    margin: 0 auto 40px;
    opacity: 0.9;
}

.cta-btn {
    background: white;
    color: var(--primary);
    border: none;
    padding: 15px 40px;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.cta-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.3);
}

/* 页脚样式 */
footer {
    background: var(--secondary);
    color: white;
    padding: 50px 0 20px;
}

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

.footer-about h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: white;
}

.footer-about p {
    color: #cbd5e1;
    margin-bottom: 20px;
    line-height: 1.8;
}

.footer-links h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: white;
}

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

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: #cbd5e1;
    text-decoration: none;
    transition: color 0.3s;
}

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

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    color: white;
    transition: background 0.3s;
}

.social-links a:hover {
    background: var(--primary);
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: #94a3b8;
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero-content,
    .solution-content,
    .demo-container,
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .hero-text h1 {
        font-size: 36px;
    }
    
    .nav-links {
        display: none;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .cta h2 {
        font-size: 32px;
    }
    
    .mobile-toggle {
        display: block;
    }
}