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

:root {
    --color-primary: #0e4194;      /* 飞利浦蓝 */
    --color-secondary: #f5f5f5;    /* 浅灰 */
    --color-accent: #0070c9;       /* 亮蓝 */
    --color-dark: #212121;         /* 深灰/黑 */
    --color-light: #ffffff;        /* 白色 */
    --color-text: #333333;
    --color-text-light: #666666;
    --color-border: #e0e0e0;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-light);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 40px;
}

/* 导航栏 */
.navbar {
    background-color: var(--color-light);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: -0.5px;
}

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-link {
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s ease;
    padding: 4px 0;
    border-bottom: 2px solid transparent;
}

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

.cta-button-nav {
    background-color: var(--color-primary);
    color: var(--color-light);
    border: none;
    padding: 10px 24px;
    border-radius: 4px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.cta-button-nav:hover {
    background-color: #0a3470;
}

/* 主横幅 */
.hero-banner {
    background: linear-gradient(135deg, #0e4194 0%, #0070c9 100%);
    padding: 120px 0;
    text-align: center;
    color: var(--color-light);
}

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

.banner-badge {
    display: inline-block;
    background-color: rgba(255, 255, 255, 0.2);
    color: var(--color-light);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 24px;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.banner-title {
    font-size: 3.5rem;
    font-weight: 300;
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.banner-subtitle {
    font-size: 1.25rem;
    margin-bottom: 40px;
    opacity: 0.95;
    font-weight: 300;
}

.banner-cta {
    background-color: var(--color-light);
    color: var(--color-primary);
    border: none;
    padding: 14px 40px;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.banner-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

/* 产品系列 */
.products {
    padding: 80px 0;
    background-color: var(--color-secondary);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--color-dark);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--color-text-light);
    margin-bottom: 60px;
    font-weight: 300;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 40px;
}

.product-card {
    background-color: var(--color-light);
    border-radius: 8px;
    padding: 32px 24px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.product-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-8px);
}

.product-card.featured {
    border: 2px solid var(--color-primary);
    box-shadow: var(--shadow-md);
}

.product-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background-color: #e0e0e0;
    color: var(--color-dark);
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.product-badge.recommended {
    background-color: var(--color-primary);
    color: var(--color-light);
}

.product-image {
    margin-bottom: 24px;
    padding: 20px;
}

.product-image svg {
    width: 100%;
    max-width: 200px;
    height: auto;
}

.product-name {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.product-model {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-bottom: 20px;
}

.product-features {
    list-style: none;
    text-align: left;
    margin-bottom: 24px;
    min-height: 120px;
}

.product-features li {
    padding: 6px 0;
    font-size: 0.9rem;
    color: var(--color-text);
    position: relative;
    padding-left: 20px;
}

.product-features li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

.product-price-area {
    margin-bottom: 20px;
    padding: 16px 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.product-price {
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-dark);
    display: block;
    margin-bottom: 4px;
}

.product-price.highlight {
    color: var(--color-primary);
}

.price-note {
    font-size: 0.75rem;
    color: var(--color-text-light);
}

.product-cta {
    background-color: var(--color-light);
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    padding: 12px 32px;
    border-radius: 4px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    width: 100%;
}

.product-cta:hover {
    background-color: var(--color-primary);
    color: var(--color-light);
}

.product-cta.primary {
    background-color: var(--color-primary);
    color: var(--color-light);
}

.product-cta.primary:hover {
    background-color: #0a3470;
}

.price-disclaimer {
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-text-light);
    font-style: italic;
}

/* 核心技术 */
.features {
    padding: 80px 0;
    background-color: var(--color-light);
}

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

.feature-card {
    text-align: left;
}

.feature-number {
    font-size: 3rem;
    font-weight: 200;
    color: var(--color-primary);
    opacity: 0.3;
    margin-bottom: 16px;
    line-height: 1;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-dark);
    margin-bottom: 12px;
}

.feature-desc {
    font-size: 0.95rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* 产品对比表 */
.comparison {
    padding: 80px 0;
    background-color: var(--color-secondary);
}

.comparison-table {
    background-color: var(--color-light);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.comparison-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    border-bottom: 1px solid var(--color-border);
}

.comparison-row:last-child {
    border-bottom: none;
}

.comparison-row.header {
    background-color: var(--color-dark);
    color: var(--color-light);
    font-weight: 600;
}

.comparison-cell {
    padding: 20px 24px;
    text-align: center;
    font-size: 0.95rem;
}

.comparison-row.header .comparison-cell:first-child,
.comparison-cell:first-child {
    text-align: left;
    font-weight: 600;
}

.comparison-cell.highlight-col {
    background-color: #f0f7ff;
    border-left: 2px solid var(--color-primary);
    border-right: 2px solid var(--color-primary);
    font-weight: 600;
    color: var(--color-primary);
}

/* 客户评价 */
.reviews {
    padding: 80px 0;
    background-color: var(--color-light);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.review-card {
    background-color: var(--color-secondary);
    padding: 32px;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    transition: box-shadow 0.3s ease;
}

.review-card:hover {
    box-shadow: var(--shadow-md);
}

.review-rating {
    color: #f59e0b;
    font-size: 1.2rem;
    margin-bottom: 16px;
}

.review-text {
    font-size: 0.95rem;
    color: var(--color-text);
    line-height: 1.8;
    margin-bottom: 24px;
}

.review-author {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: var(--color-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 500;
}

.author-name {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 2px;
}

.author-location {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.review-product {
    font-size: 0.85rem;
    color: var(--color-primary);
    font-weight: 500;
}

/* 页脚 */
.footer {
    background-color: var(--color-dark);
    color: #b0b0b0;
    padding: 60px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-title {
    color: var(--color-light);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 12px;
}

.footer-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 2px;
    background-color: var(--color-primary);
}

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

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: #b0b0b0;
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    display: inline-block;
    position: relative;
    padding: 2px 0;
}

.footer-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 1px;
    bottom: 0;
    left: 0;
    background-color: var(--color-light);
    transition: width 0.3s ease;
}

.footer-links a:hover {
    color: var(--color-light);
    padding-left: 4px;
}

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

.footer-text {
    font-size: 0.9rem;
    margin-bottom: 8px;
    color: #b0b0b0;
    line-height: 1.6;
}

.footer-cta {
    background-color: transparent;
    color: var(--color-light);
    border: 2px solid var(--color-light);
    padding: 12px 28px;
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 20px;
    display: inline-block;
    width: 100%;
    max-width: 200px;
}

.footer-cta:hover {
    background-color: var(--color-light);
    color: var(--color-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.2);
}

.footer-bottom {
    border-top: 1px solid #404040;
    padding-top: 24px;
    text-align: center;
    font-size: 0.875rem;
}

/* 微信二维码弹窗 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
    justify-content: center;
    align-items: center;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background-color: var(--color-light);
    padding: 48px 40px;
    border-radius: 8px;
    max-width: 480px;
    width: 90%;
    position: relative;
    animation: slideUp 0.4s ease;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.3);
}

@keyframes slideUp {
    from {
        transform: translateY(40px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 1.75rem;
    font-weight: 300;
    color: var(--color-text-light);
    cursor: pointer;
    transition: color 0.2s ease;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    color: var(--color-dark);
}

.modal-title {
    text-align: center;
    color: var(--color-dark);
    font-size: 1.5rem;
    margin-bottom: 32px;
    font-weight: 400;
}

.qr-container {
    background-color: var(--color-secondary);
    padding: 24px;
    border-radius: 8px;
    margin-bottom: 24px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.qr-image {
    width: 100%;
    max-width: 300px;
    height: auto;
    border-radius: 4px;
}

.modal-subtitle {
    text-align: center;
    color: var(--color-text);
    font-size: 1.05rem;
    margin-bottom: 8px;
    font-weight: 500;
}

.modal-note {
    text-align: center;
    color: var(--color-text-light);
    font-size: 0.9rem;
}

/* 响应式设计 - 平板 */
@media (max-width: 1024px) {
    .container {
        padding: 0 24px;
    }

    .products-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }

    .comparison-table {
        overflow-x: auto;
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 响应式设计 - 手机 */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }

    .nav-menu {
        display: none;
    }

    .banner-title {
        font-size: 2.5rem;
    }

    .banner-subtitle {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .reviews-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .product-price {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .navbar .container {
        height: 56px;
    }

    .logo {
        font-size: 1.25rem;
    }

    .cta-button-nav {
        padding: 8px 16px;
        font-size: 0.875rem;
    }

    .hero-banner {
        padding: 80px 0;
    }

    .banner-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .modal-content {
        padding: 32px 24px;
    }
}