/* Enhanced Typography & Layout */
body {
    font-family: 'Helvetica Neue', Helvetica, Arial, 'Microsoft YaHei', sans-serif;
    color: #333;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: #1a1a1a;
}

.product-info h1 {
    font-size: 2rem;
    font-weight: 700;
    color: #000;
    line-height: 1.3;
    margin-bottom: 24px;
}

/* Specs Table Enhancement */
.specs-table {
    width: 100%;
    margin-top: 24px;
    border-collapse: collapse;
    font-size: 0.95rem;
    border: 1px solid #e0e0e0;
}

.specs-table th {
    background-color: #f5f7fa;
    color: #333;
    font-weight: 600;
    padding: 12px 16px;
    border-bottom: 1px solid #e0e0e0;
}

.specs-table td {
    padding: 12px 16px;
    border: 1px solid #e0e0e0;
    color: #555;
}

.specs-table td:nth-child(odd) {
    background-color: #fafafa;
    font-weight: 500;
    color: #333;
    width: 15%;
}

.specs-table td:nth-child(even) {
    background-color: #fff;
    width: 35%;
}

/* Button Refinement */
.btn--primary {
    background-color: #00A0E9;
    color: #fff;
    padding: 12px 32px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 0.5px;
    transition: background-color 0.2s, transform 0.1s;
    text-decoration: none;
    display: inline-block;
}

.btn--primary:hover {
    background-color: #008ccb;
    transform: translateY(-1px);
}

/* Sidebar Refinement */
.sidebar-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid #f0f0f0;
}

.sidebar-header {
    font-weight: 600;
    padding: 10px 0;
    font-size: 1rem;
}

.sidebar-subitem a {
    padding: 8px 0 8px 12px;
    font-size: 0.9rem;
    border-left: 2px solid transparent;
}

.sidebar-subitem a:hover, .sidebar-subitem a.active {
    border-left-color: #00A0E9;
    color: #00A0E9;
    background-color: #f9fcff;
}