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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
    line-height: 1.6;
    color: #333;
    background: #fff
}

#targetDiv {
    width: 100%;
    overflow: hidden
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    z-index: 1000;
    backdrop-filter: blur(10px)
}

nav {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px
}

.logo {
    font-size: 28px;
    font-weight: 700;
    color: #2d8cf0;
    text-decoration: none;
    letter-spacing: -1px
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 40px
}

.nav-links a {
    text-decoration: none;
    color: #333;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s;
    position: relative
}

.nav-links a:hover {
    color: #2d8cf0
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #2d8cf0;
    transition: width 0.3s
}

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

.hero {
    width: 100%;
    min-height: 50vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    padding: 120px 40px 80px
}

.hero-content {
    max-width: 900px
}

.hero h1 {
    font-size: 64px;
    font-weight: 800;
    margin-bottom: 30px;
    line-height: 1.1;
    letter-spacing: -2px
}

.hero p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.95;
    line-height: 1.8
}

.downlbtnvmmn {
    display: inline-block;
    padding: 18px 50px;
    background: #fff;
    color: #2d8cf0;
    text-decoration: none;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 600;
    transition: all 0.3s;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2)
}

.downlbtnvmmn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
    background: #f8f9fa
}

section {
    padding: 100px 40px
}

.container {
    max-width: 1400px;
    margin: 0 auto
}

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

.section-title h2 {
    font-size: 42px;
    font-weight: 700;
    color: #333;
    margin-bottom: 20px
}

.section-title p {
    font-size: 18px;
    color: #666;
    max-width: 700px;
    margin: 0 auto
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-top: 60px
}

.feature-card {
    background: #fff;
    padding: 50px 40px;
    border-radius: 20px;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.3s;
    text-align: center
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.15)
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 30px;
    font-size: 36px
}

.feature-card h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #333
}

.feature-card p {
    color: #666;
    line-height: 1.8;
    font-size: 15px
}

.solutions-section {
    background: #f8f9fa
}

.solutions-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px
}

.solution-item {
    background: #fff;
    padding: 50px;
    border-radius: 20px;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.3s;
    display: flex;
    align-items: flex-start;
    gap: 30px
}

.solution-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.12)
}

.solution-number {
    font-size: 48px;
    font-weight: 800;
    color: #2d8cf0;
    line-height: 1;
    min-width: 60px
}

.solution-content h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #333
}

.solution-content p {
    color: #666;
    line-height: 1.8;
    font-size: 15px
}

.download-section {
    background: linear-gradient(135deg, #2d8cf0 0%, #5b8ff9 100%);
    color: #fff;
    text-align: center
}

.download-section .section-title h2,
.download-section .section-title p {
    color: #fff
}

.download-section .section-title p {
    opacity: 0.9
}

.download-options {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 60px
}

.download-card {
    background: rgba(255, 255, 255, 0.15);
    padding: 40px 30px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    transition: all 0.3s
}

.download-card:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-5px)
}

.download-card .icon {
    font-size: 48px;
    margin-bottom: 20px
}

.download-card h3 {
    font-size: 20px;
    margin-bottom: 15px
}

.download-card p {
    font-size: 14px;
    opacity: 0.9;
    margin-bottom: 25px
}

.download-card .downlbtnvmmn {
    background: #fff;
    color: #2d8cf0;
    padding: 12px 30px;
    font-size: 14px;
    box-shadow: none
}

.stats-section {
    background: #fff
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center
}

.stat-item {
    padding: 40px 20px
}

.stat-number {
    font-size: 56px;
    font-weight: 800;
    color: #2d8cf0;
    margin-bottom: 15px;
    line-height: 1
}

.stat-label {
    font-size: 18px;
    color: #666;
    font-weight: 500
}

.pricing-section {
    background: #f8f9fa
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 60px
}

.pricing-card {
    background: #fff;
    padding: 60px 40px;
    border-radius: 20px;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.3s;
    text-align: center;
    position: relative
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15)
}

.pricing-card.featured {
    border: 3px solid #2d8cf0;
    transform: scale(1.05)
}

.pricing-card.featured::before {
    content: '推荐';
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: #2d8cf0;
    color: #fff;
    padding: 8px 25px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600
}

.pricing-card h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #333
}

.pricing-price {
    font-size: 48px;
    font-weight: 800;
    color: #2d8cf0;
    margin-bottom: 10px
}

.pricing-price span {
    font-size: 18px;
    color: #666;
    font-weight: 400
}

.pricing-desc {
    color: #666;
    margin-bottom: 30px;
    font-size: 15px
}

.pricing-features {
    list-style: none;
    text-align: left;
    margin-bottom: 40px
}

.pricing-features li {
    padding: 12px 0;
    border-bottom: 1px solid #f0f0f0;
    color: #666;
    font-size: 15px
}

.pricing-features li::before {
    content: '✓';
    color: #2d8cf0;
    margin-right: 10px;
    font-weight: bold
}

footer {
    background: #1a1a2e;
    color: #fff;
    padding: 80px 40px 40px
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px
}

.footer-brand h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: #2d8cf0
}

.footer-brand p {
    color: #999;
    line-height: 1.8;
    margin-bottom: 30px
}

.footer-links h4 {
    font-size: 18px;
    margin-bottom: 25px;
    color: #fff
}

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

.footer-links li {
    margin-bottom: 15px
}

.footer-links a {
    color: #999;
    text-decoration: none;
    transition: color 0.3s;
    font-size: 15px
}

.footer-links a:hover {
    color: #2d8cf0
}

.footer-bottom {
    max-width: 1400px;
    margin: 60px auto 0;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: #666;
    font-size: 14px
}

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

    .solutions-list {
        grid-template-columns: 1fr
    }

    .download-options {
        grid-template-columns: repeat(2, 1fr)
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr)
    }

    .pricing-grid {
        grid-template-columns: 1fr
    }

    .pricing-card.featured {
        transform: none
    }

    .footer-content {
        grid-template-columns: 1fr 1fr
    }
}

@media (max-width: 768px) {
    nav {
        padding: 0 20px
    }

    .nav-links {
        gap: 20px
    }

    .hero h1 {
        font-size: 42px
    }

    .hero p {
        font-size: 16px
    }

    .features-grid {
        grid-template-columns: 1fr
    }

    .download-options {
        grid-template-columns: 1fr
    }

    .footer-content {
        grid-template-columns: 1fr
    }
}