/* ==============================================
 紧固件计算器全局样式
 命名空间：.calculator-page-container 隔离样式冲突
============================================== */
.calculator-page-container {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 32px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* 侧边导航栏 PC端 */
.calculator-sidebar {
    position: sticky;
    top: 40px;
    height: fit-content;
    background: #ffffff;
    border: 1px solid #e2e2e2;
    border-radius: 8px;
    padding: 24px;
}
.calculator-sidebar h3 {
    margin-top: 0;
    margin-bottom: 16px;
    font-size: 18px;
    color: #222;
}
.calc-nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.calc-nav-list li {
    margin-bottom: 8px;
}
.calc-nav-list li a {
    display: block;
    padding: 10px 12px;
    border-radius: 6px;
    color: #444;
    text-decoration: none;
    transition: 0.2s ease;
}
.calc-nav-list li a:hover {
    background-color: #f4f4f4;
}
.calc-nav-list li.active a {
    background-color: #232323;
    color: #fff;
}
.sidebar-toggle {
    display: none;
    width: 100%;
    padding: 10px;
    margin-top: 16px;
    border: 1px solid #ddd;
    background: #f7f7f7;
    border-radius: 6px;
    cursor: pointer;
}

/* 主内容区域 */
.calculator-main-content {
    min-width: 0;
}

/* 计算器通用盒子 */
.calc-box {
    background: #fff;
    border: 1px solid #e2e2e2;
    border-radius: 10px;
    padding: 32px;
}
.calc-box h2 {
    margin-top: 0;
    margin-bottom: 28px;
    color: #1a1a1a;
}
.calc-row {
    margin-bottom: 20px;
}
.calc-row label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #333;
}
.calc-row input,
.calc-row select {
    width: 100%;
    max-width: 420px;
    padding: 12px 14px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 15px;
}
.calc-btn {
    padding: 12px 28px;
    background: #111;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 15px;
    transition: .2s;
}
.calc-btn:hover {
    background: #333;
}
.result-panel {
    margin-top: 24px;
    padding: 20px;
    background: #f8f8f8;
    border-radius: 8px;
    font-size: 16px;
    line-height: 1.7;
}

/* 计算器首页卡片网格（列表页） */
.calc-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
}
.calc-card {
    display: block;
    padding: 24px;
    border: 1px solid #e2e2e2;
    border-radius: 10px;
    text-decoration: none;
    transition: 0.2s;
}
.calc-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.07);
    border-color: #aaa;
}
.calc-card h4 {
    margin: 0 0 10px;
    color: #111;
}
.calc-card p {
    margin:0;
    color:#555;
    font-size:14px;
}

/* ===================== 移动端适配 <992px ===================== */
@media (max-width: 992px) {
    .calculator-page-container {
        grid-template-columns: 1fr;
        padding: 20px 12px;
    }
    .sidebar-toggle {
        display: block;
    }
    .calculator-sidebar {
        position: static;
    }
    .calculator-sidebar.calc-sidebar-hide .calc-nav-list {
        display: none;
    }
}