body {
    font-family: "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", Arial, sans-serif;
    background-color: #f8f9fa;
    color: #374151;
}
.page-wrapper {
    position: relative;
    overflow-x: hidden;
}
.breadcrumb-container {
    background: white;
    padding: 1rem 1.5rem;
    margin: 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
.product-hero {
    background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
    color: white;
    padding: 3rem 0;
    margin-bottom: 0;
    position: relative;
    overflow: hidden;
    --hero-image: none;
}
.product-hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--hero-image) no-repeat center center;
    background-size: cover;
    opacity: 0.15;
}
.product-hero-content {
    position: relative;
    z-index: 1;
    animation: heroFade 0.9s ease-out forwards;
}
.product-title {
    font-weight: 800;
    margin-bottom: 1rem;
    font-size: clamp(2rem, 5vw, 3rem);
    letter-spacing: 0.02em;
}
.product-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 1.5rem;
}
.product-subtext {
    margin-bottom: 0;
    font-size: 1rem;
    opacity: 0.85;
}
@keyframes heroFade {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.product-overview {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin: 2rem 0;
    align-items: center;
}
.product-image-container {
    flex: 1;
    min-width: 280px;
}
.product-image-container img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    border: 1px solid #e2e8f0;
    background: white;
}
.product-details {
    flex: 2;
    min-width: 280px;
    font-size: 1.05rem;
    color: #1f2937;
    line-height: 1.8;
}
.product-details h2 {
    color: #1e40af;
    font-weight: 700;
    margin-bottom: 1rem;
}
.key-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin: 2.5rem 0;
}
.feature-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}
.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 18px rgba(0, 0, 0, 0.12);
}
.feature-icon {
    font-size: 2rem;
    color: #1d4ed8;
    margin-bottom: 1rem;
}
.feature-title {
    color: #1e40af;
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 1.15rem;
}
.feature-card::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 12px;
    border: 1px solid transparent;
    transition: border-color 0.3s ease;
}
.feature-card:hover::after {
    border-color: rgba(59, 130, 246, 0.4);
}
.tab-wrapper {
    margin-top: 2rem;
}
.nav-tabs {
    border-bottom: 2px solid #e2e8f0;
    margin-bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-radius: 12px 12px 0 0;
    padding: 0.5rem 0;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}
.nav-tabs .nav-link {
    color: #4b5563;
    border: none;
    border-bottom: 3px solid transparent;
    font-weight: 500;
    padding: 1rem 1.5rem;
    font-size: 1.05rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-radius: 0;
}
.nav-tabs .nav-link.active {
    color: #1d4ed8;
    border-bottom: 3px solid #1d4ed8;
    background: transparent;
}
.nav-tabs .nav-link:hover {
    color: #1d4ed8;
    border-bottom: 3px solid #dbeafe;
}
.tab-content {
    background: white;
    border-radius: 0 0 12px 12px;
    box-shadow: 0 6px 16px rgba(16, 24, 40, 0.05), 0 1px 3px rgba(16, 24, 40, 0.04);
    padding: 2rem;
    border: 1px solid #e2e8f0;
    border-top: none;
}
.section-title {
    color: #1e40af;
    font-weight: 700;
    margin: 1.5rem 0 1rem 0;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid #dbeafe;
    font-size: 1.4rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.subsection-title {
    color: #1e40af;
    font-weight: 600;
    margin: 1.25rem 0 0.75rem 0;
    font-size: 1.2rem;
}
.spec-table,
.download-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    overflow: hidden;
}
.spec-table th,
.download-table th {
    background-color: #1e40af;
    color: white;
    padding: 0.75rem;
    text-align: left;
}
.spec-table td,
.download-table td {
    padding: 0.75rem;
    border-bottom: 1px solid #e2e8f0;
}
.spec-table tr:nth-child(even),
.download-table tr:nth-child(even) {
    background-color: #f8fafc;
}
.spec-table tbody tr:hover,
.download-table tbody tr:hover {
    background-color: #eef2ff;
}
.feature-section {
    margin: 1.5rem 0;
}
.feature-category {
    margin-bottom: 2.5rem;
}
.feature-category h3 {
    color: #1e40af;
    font-weight: 600;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #e2e8f0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.feature-category ul {
    padding-left: 1.5rem;
}
.feature-category li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}
.image-container {
    text-align: center;
    margin: 2rem 0;
    padding: 1rem;
}
.image-container img {
    max-width: 100%;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: 1px solid #e2e8f0;
    background: white;
}
.btn-download {
    background-color: #1d4ed8;
    border-color: #1d4ed8;
    padding: 0.45rem 1.25rem;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: #fff;
    letter-spacing: 0.3px;
}
.btn-download:hover {
    background-color: #1e40af;
    border-color: #1e40af;
    transform: translateY(-2px);
}
.tech-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}
.highlight-card {
    background: #f9fafb;
    border-left: 4px solid #3b82f6;
    padding: 1.5rem;
    border-radius: 0 8px 8px 0;
}
.highlight-title {
    color: #1e40af;
    font-weight: 600;
    margin-bottom: 0.75rem;
}
.glass-card {
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(31, 38, 135, 0.37);
}
.reveal-on-scroll {
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.js-enabled .reveal-on-scroll {
    opacity: 0;
    transform: translateY(16px);
}
.js-enabled .reveal-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}
.stat-card {
    background: #1d4ed8;
    color: white;
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    box-shadow: 0 6px 12px rgba(29, 78, 216, 0.35);
}
.stat-value {
    font-size: 2rem;
    font-weight: 700;
    display: block;
}
.stat-label {
    font-size: 0.95rem;
    opacity: 0.9;
}
@media (max-width: 768px) {
    .product-hero {
        padding: 2rem 0;
    }
    .nav-tabs .nav-link {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }
    .product-overview {
        flex-direction: column;
    }
    .product-image-container,
    .product-details {
        min-width: 100%;
    }
}