@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: #f8fafc;
    color: #0f172a;
}

/* 隐藏 Number 输入框自带的上下箭头 */
input[type=number]::-webkit-inner-spin-button, 
input[type=number]::-webkit-outer-spin-button { 
    -webkit-appearance: none; 
    margin: 0; 
}
input[type=number] {
    -moz-appearance: textfield;
}

.fade-in {
    animation: fadeIn 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 优质表格样式，利于 Google 抓取精选摘要 */
.seo-table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
}
.seo-table th, .seo-table td {
    border: 1px solid #e2e8f0;
    padding: 1rem;
    text-align: left;
}
.seo-table th {
    background-color: #f1f5f9;
    font-weight: 700;
}