:root {
    --primary: #0f172a;        /* 深科技蓝 */
    --secondary: #0ea5e9;      /* 科技蓝 */
    --accent: #8b5cf6;         /* 科技紫 */
    --light: #f1f5f9;          /* 浅灰蓝 */
    --dark: #1e293b;           /* 柔和的深蓝灰 */
    --text-primary: #334155;   /* 主文本颜色 - 深灰蓝 */
    --text-secondary: #64748b; /* 次级文本颜色 - 中灰蓝 */
    --text-tertiary: #94a3b8;  /* 三级文本颜色 - 浅灰蓝 */
    --transition: all 0.3s ease;
    --tech-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --card-gradient: linear-gradient(to bottom right, #ffffff, #f0f9ff);
}

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

body {
    background-color: #f8fafc;
    color: var(--text-primary); 
    line-height: 1.6;
    font-weight: 400;
}

/* 导航栏样式 - 优化文本颜色 */
.navbar {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(14, 165, 233, 0.15);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo h1 {
    font-size: 1.8rem;
    color: var(--primary); 
    font-weight: 700;
    letter-spacing: -0.5px;
}

.logo span {
    color: var(--accent);
    font-weight: 700;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-primary); 
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary);
    transition: var(--transition);
    border-radius: 2px;
}

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

.nav-links a:hover {
    color: var(--secondary);
}

.cta-button {
    background: var(--tech-gradient);
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 6px rgba(14, 165, 233, 0.3);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.cta-button:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background: linear-gradient(90deg, #0ea5e9 0%, #8b5cf6 100%);
    transition: var(--transition);
    z-index: -1;
}

.cta-button:hover:before {
    width: 100%;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 15px rgba(14, 165, 233, 0.4);
}

/* 首屏区域 - 增强文本可读性 */
.hero {
    background: var(--tech-gradient);
    color: rgba(255, 255, 255, 0.95);
    padding: 10rem 5% 7rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero:before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, transparent 70%),
        radial-gradient(circle, rgba(14, 165, 233, 0.1) 0%, transparent 70%);
    animation: rotate 30s linear infinite;
    z-index: 0;
}

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

.hero h2 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    line-height: 1.2;
    color: white;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 2rem;
    opacity: 0.92;
    color: #e2e8f0;
    font-weight: 300;
    letter-spacing: 0.3px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    justify-content: center;
}

.secondary-button {
    background-color: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.secondary-button:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    transition: var(--transition);
    z-index: -1;
}

.secondary-button:hover:before {
    width: 100%;
}

.secondary-button:hover {
    background-color: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.5);
}

/* 功能展示区 - 优化文本颜色 */
.features {
    padding: 6rem 5%;
    background-color: #f8fafc;
    position: relative;
}

.section-title {
    text-align: center;
    margin-bottom: 4rem;
    position: relative;
    z-index: 2;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1rem;
    font-weight: 700;
}

.section-title p {
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    font-size: 1.1rem;
    font-weight: 400;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.feature-card {
    background: var(--card-gradient);
    border-radius: 16px;
    padding: 2.5rem 2rem;
    text-align: center;
    transition: var(--transition);
    box-shadow: 0 8px 20px rgba(14, 165, 233, 0.08);
    border: 1px solid rgba(226, 232, 240, 0.5);
    position: relative;
    overflow: hidden;
}

.feature-card:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, var(--secondary), var(--accent));
    transition: var(--transition);
}

.feature-card:hover:before {
    width: 100%;
    opacity: 0.05;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(14, 165, 233, 0.15);
}

.feature-icon {
    font-size: 3rem;
    color: var(--secondary);
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    color: var(--accent);
    transform: scale(1.1);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary);
    font-weight: 600;
}

.feature-card p {
    color: var(--text-secondary);
    font-weight: 400;
}

/* 优势展示区 - 优化文本颜色 */
.benefits {
    padding: 6rem 5%;
    background-color: #f1f5f9;
    position: relative;
}

.benefits:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 10% 20%, rgba(139, 92, 246, 0.05) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(14, 165, 233, 0.05) 0%, transparent 20%);
    z-index: 1;
}

.benefits-container {
    display: flex;
    flex-wrap: wrap;
    gap: 3rem;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.benefit-content {
    flex: 1;
    min-width: 300px;
}

.benefit-content h2 {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.benefit-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    background: rgba(255, 255, 255, 0.7);
    padding: 1.5rem;
    border-radius: 12px;
    backdrop-filter: blur(10px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.03);
    transition: var(--transition);
    border: 1px solid rgba(241, 245, 249, 0.5);
}

.benefit-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(14, 165, 233, 0.1);
    border-color: rgba(14, 165, 233, 0.2);
}

.benefit-icon {
    background: linear-gradient(135deg, var(--secondary), var(--accent));
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.5rem;
}

.benefit-text h3 {
    margin-bottom: 0.5rem;
    color: var(--primary);
    font-weight: 600;
}

.benefit-text p {
    color: var(--text-secondary);
    font-weight: 400;
}

.benefit-image {
    flex: 1;
    min-width: 300px;
    background: linear-gradient(45deg, #e0f2fe, #ede9fe);
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    position: relative;
    border: 1px solid rgba(226, 232, 240, 0.5);
}

.benefit-image:before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, transparent 70%),
        radial-gradient(circle, rgba(14, 165, 233, 0.1) 0%, transparent 70%);
    animation: rotate 30s linear infinite;
    z-index: 1;
}

.benefit-image-content {
    position: relative;
    z-index: 2;
    padding: 2rem;
    text-align: center;
    color: var(--primary);
}

.benefit-image-content i {
    font-size: 4rem;
    margin-bottom: 1rem;
    color: var(--secondary);
}

.benefit-image-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--primary);
    font-weight: 600;
}

.benefit-image-content p {
    color: var(--text-secondary);
    font-weight: 400;
}

/* 客户评价 - 优化文本颜色 */
.testimonials {
    padding: 6rem 5%;
    background-color: #f8fafc;
    position: relative;
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.testimonial-card {
    background: var(--card-gradient);
    border-radius: 16px;
    padding: 2.5rem 2rem;
    position: relative;
    box-shadow: 0 8px 20px rgba(14, 165, 233, 0.08);
    border: 1px solid rgba(226, 232, 240, 0.5);
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(14, 165, 233, 0.15);
}

.testimonial-card::before {
    content: "";
    font-size: 5rem;
    position: absolute;
    top: -20px;
    left: 20px;
    color: var(--secondary);
    opacity: 0.15;
}

.testimonial-content {
    margin-bottom: 1.5rem;
    font-style: italic;
    color: var(--text-secondary);
    position: relative;
    z-index: 2;
    line-height: 1.7;
    font-weight: 400;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--secondary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 1.2rem;
}

.author-info h4 {
    color: var(--primary);
    font-weight: 600;
}

.author-info p {
    color: var(--text-tertiary);
    font-size: 0.9rem;
    font-weight: 400;
}

/* 定价区域 - 优化文本颜色 */
.pricing {
    padding: 6rem 5%;
    background-color: #f1f5f9;
    position: relative;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--card-gradient);
    border-radius: 16px;
    padding: 2.5rem;
    text-align: center;
    box-shadow: 0 8px 20px rgba(14, 165, 233, 0.08);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(226, 232, 240, 0.5);
    z-index: 2;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(14, 165, 233, 0.15);
}

.popular-badge {
    position: absolute;
    top: 20px;
    right: -34px;
    background: linear-gradient(90deg, var(--accent), var(--secondary));
    color: white;
    padding: 0.5rem 2rem;
    transform: rotate(45deg);
    font-size: 0.8rem;
    font-weight: bold;
    box-shadow: 0 3px 10px rgba(139, 92, 246, 0.3);
}

.pricing-card h3 {
    font-size: 1.8rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.price {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: linear-gradient(90deg, var(--secondary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.price span {
    font-size: 1rem;
    color: var(--text-tertiary);
    font-weight: 400;
}

.pricing-features {
    list-style: none;
    margin-bottom: 2rem;
    text-align: left;
}

.pricing-features li {
    padding: 0.8rem 0;
    border-bottom: 1px solid #eee;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.pricing-features li:before {
    content: "✓";
    color: var(--secondary);
    font-weight: bold;
}

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

/* 页脚 - 增强文本可读性 */
.footer {
    background: var(--tech-gradient);
    color: white;
    padding: 4rem 5% 2rem;
    position: relative;
    overflow: hidden;
}

.footer:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(14, 165, 233, 0.1) 0%, transparent 50%);
    z-index: 1;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    max-width: 1200px;
    margin: 0 auto 3rem;
    position: relative;
    z-index: 2;
}

.footer-column h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    position: relative;
    color: white;
    font-weight: 600;
}

.footer-column h3::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--secondary);
    border-radius: 2px;
}

.footer-column p {
    color: #cbd5e1;
    font-weight: 300;
}

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

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

.footer-links a {
    color: #e2e8f0;
    text-decoration: none;
    transition: var(--transition);
    display: inline-block;
    padding: 0.2rem 0;
    position: relative;
    font-weight: 400;
}

.footer-links a:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary);
    transition: var(--transition);
}

.footer-links a:hover:after {
    width: 100%;
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: #e2e8f0;
    font-weight: 300;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255,255,255,0.1);
    border-radius: 10px;
    color: white;
    transition: var(--transition);
}

.social-links a:hover {
    background: linear-gradient(135deg, var(--secondary), var(--accent));
    transform: translateY(-3px);
}

.copyright {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: #a0aec0;
    font-size: 0.9rem;
    position: relative;
    z-index: 2;
    font-weight: 300;
}

.copyright a {
    color: #cbd5e1;
    text-decoration: none;
    transition: var(--transition);
    font-weight: 400;
}

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

/* 动画效果 */
@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        padding: 1rem;
    }
    
    .nav-links {
        margin: 1.5rem 0;
        gap: 1.5rem;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero h2 {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
        max-width: 300px;
    }
    
    .hero-buttons button {
        width: 100%;
    }
    
    .benefits-container {
        flex-direction: column;
    }
}