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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    background: #ffffff;
    color: #1a1a1a;
    line-height: 1.5;
}

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #e5e5e5;
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-brand {
    font-size: 22px;
    font-weight: 700;
    color: #1a1a1a;
    letter-spacing: -0.3px;
    text-decoration: none;
}

.navbar-brand i {
    font-size: 26px;
    margin-right: 8px;
    color: #1a1a1a;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: #4a4a4a;
    transition: color 0.2s ease;
}

.nav-link:hover {
    color: #1a1a1a;
}

.btn-trial {
    background: #1a1a1a;
    color: #ffffff;
    border: none;
    padding: 8px 24px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
    margin-left: 16px;
}

.btn-trial:hover {
    background: #333333;
    transform: translateY(-1px);
    color: #ffffff;
}

/* Hero 区域 */
.hero {
    padding: 100px 0;
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
}

.hero-title {
    font-size: 52px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 18px;
    color: #6c757d;
    margin-bottom: 32px;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn-primary {
    background: #1a1a1a;
    color: #ffffff;
    padding: 12px 32px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
    display: inline-block;
}

.btn-primary:hover {
    background: #333333;
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: #1a1a1a;
    padding: 12px 32px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 500;
    border: 1px solid #1a1a1a;
    transition: all 0.2s ease;
    display: inline-block;
}

.btn-secondary:hover {
    background: #f5f5f5;
    transform: translateY(-2px);
}

.hero-image {
    background: #f5f5f5;
    border-radius: 20px;
    padding: 60px 40px;
    text-align: center;
    border: 1px solid #e5e5e5;
}

.hero-image i {
    font-size: 100px;
    color: #adb5bd;
}

.hero-image p {
    margin-top: 20px;
    color: #9ca3af;
    font-size: 14px;
}

/* 功能特点 */
.features {
    padding: 80px 0;
    background: #ffffff;
}

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

.section-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    color: #6c757d;
    font-size: 16px;
}

.feature-card {
    background: #ffffff;
    border: 1px solid #e5e5e5;
    border-radius: 20px;
    padding: 40px 24px;
    text-align: center;
    transition: all 0.3s ease;
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);
    border-color: #d0d0d0;
}

.feature-card i {
    font-size: 48px;
    color: #1a1a1a;
    margin-bottom: 20px;
    display: inline-block;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-card p {
    color: #6c757d;
    font-size: 14px;
    line-height: 1.6;
}

/* 使用步骤 */
.steps {
    padding: 80px 0;
    background: #f8f9fa;
}

.step-card {
    text-align: center;
    position: relative;
    background: #ffffff;
    border-radius: 20px;
    padding: 40px 24px;
    border: 1px solid #e5e5e5;
}

.step-number {
    width: 40px;
    height: 40px;
    background: #1a1a1a;
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    margin: 0 auto 20px;
}

.step-image {
    width: 80px;
    height: 80px;
    background: #f5f5f5;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.step-image i {
    font-size: 36px;
    color: #1a1a1a;
}

.step-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
}

.step-card p {
    color: #6c757d;
    font-size: 13px;
}

.step-arrow {
    display: none;
}

/* 价格板块 */
.pricing {
    padding: 80px 0;
    background: #ffffff;
}

.pricing-card {
    background: #ffffff;
    border: 1px solid #e5e5e5;
    border-radius: 24px;
    padding: 32px 24px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    height: 100%;
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.pricing-card.popular {
    border: 2px solid #1a1a1a;
    transform: scale(1.02);
}

.pricing-card.popular:hover {
    transform: scale(1.02) translateY(-5px);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: #1a1a1a;
    color: #ffffff;
    font-size: 12px;
    font-weight: 500;
    padding: 4px 16px;
    border-radius: 20px;
    white-space: nowrap;
}

.pricing-price {
    font-size: 48px;
    font-weight: 700;
    color: #1a1a1a;
    margin: 20px 0 8px;
}

.pricing-price .currency {
    font-size: 24px;
    font-weight: 500;
    vertical-align: super;
}

.pricing-name {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 24px;
    color: #1a1a1a;
}

.pricing-features {
    list-style: none;
    padding: 0;
    margin: 0 0 28px 0;
}

.pricing-features li {
    font-size: 14px;
    color: #6c757d;
    padding: 8px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.pricing-features li i {
    font-size: 16px;
}

.pricing-features li i.bi-check-lg {
    color: #10b981;
}

.pricing-features li i.bi-info-circle {
    color: #6c757d;
    font-size: 12px;
}

.pricing-btn {
    display: inline-block;
    background: transparent;
    border: 1px solid #1a1a1a;
    color: #1a1a1a;
    padding: 10px 32px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    transition: all 0.2s ease;
}

.pricing-btn:hover {
    background: #1a1a1a;
    color: #ffffff;
}

.pricing-card.popular .pricing-btn {
    background: #1a1a1a;
    color: #ffffff;
}

.pricing-card.popular .pricing-btn:hover {
    background: #333333;
}

.pricing-note {
    text-align: center;
    margin-top: 40px;
    padding: 16px;
    background: #ffffff;
    border-radius: 12px;
    border: 1px solid #e5e5e5;
    font-size: 13px;
    color: #6c757d;
}

.pricing-note i {
    margin-right: 8px;
    color: #1a1a1a;
}

.btn-trial-large {
    display: inline-block;
    background: #1a1a1a;
    color: #ffffff;
    padding: 14px 40px;
    border-radius: 40px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
}

.btn-trial-large:hover {
    background: #333333;
    transform: translateY(-2px);
    color: #ffffff;
}

/* 页脚 */
.footer {
    background: #ffffff;
    border-top: 1px solid #e5e5e5;
    padding: 60px 0 30px;
}

.footer h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer p {
    color: #6c757d;
    font-size: 14px;
    margin-bottom: 20px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: #4a4a4a;
}

.contact-item i {
    font-size: 18px;
    color: #1a1a1a;
}

.qrcode-section {
    display: flex;
    justify-content: center;
    gap: 20px;
}

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

.qrcode-placeholder {
    width: 140px;
    height: 140px;
    background: #f5f5f5;
    border-radius: 16px;
    border: 1px solid #e5e5e5;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
}

.qrcode-placeholder i {
    font-size: 48px;
    color: #07C160;
    margin-bottom: 8px;
}

.qrcode-placeholder span {
    font-size: 12px;
    color: #6c757d;
}

.qrcode-item p {
    font-size: 12px;
    margin-bottom: 0;
}

.footer-bottom {
    text-align: center;
    padding-top: 40px;
    margin-top: 40px;
    border-top: 1px solid #e5e5e5;
}

.footer-bottom p {
    font-size: 12px;
    color: #adb5bd;
    margin-bottom: 0;
}

/* 响应式 */
@media (min-width: 992px) {
    .step-arrow {
        display: block;
        position: absolute;
        top: 50%;
        right: -40px;
        transform: translateY(-50%);
        font-size: 28px;
        color: #d0d0d0;
    }
    
    .col-md-4:last-child .step-arrow {
        display: none;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 60px 0;
        text-align: center;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .btn-trial {
        margin-left: 0;
        margin-top: 12px;
        display: inline-block;
    }
    
    .navbar-collapse {
        text-align: center;
    }
    
    .step-card {
        margin-bottom: 20px;
    }

    .pricing {
        padding: 60px 0;
    }
    
    .pricing-card.popular {
        transform: scale(1);
    }
    
    .pricing-card.popular:hover {
        transform: translateY(-5px);
    }
    
    .pricing-price {
        font-size: 40px;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 28px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-primary, .btn-secondary {
        width: 100%;
        text-align: center;
    }
    
    .feature-card {
        padding: 28px 20px;
    }
}