:root {
            --primary: #3B82F6;
            --primary-dark: #2563eb;
            --primary-light: #eff6ff;
            --secondary: #10B981;
            --neutral: #64748b;
            --neutral-light: #f1f5f9;
            --neutral-dark: #334155;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 10px 30px rgba(0, 0, 0, 0.12);
            --radius: 8px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.1;
    color: #333;
    max-width: 100%;
    margin: 0 auto;
    padding: 0px;
    background-color: #ffffff;
    -webkit-text-size-adjust: 100%;
}


.container {
    background-color: #ffffff;
    max-width: 1180px;
    margin: 0 auto;
    border-radius: 5px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 10px;
    margin-bottom: 10px;
    overflow-x: auto;
    margin-top: 25px;
}

        header {
            backdrop-filter: blur(10px);
            background-color: rgba(255, 255, 255, 0.8);
            padding: 20px 0px;
            position: sticky;
            top: 0;
            z-index: 5;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
        }
        .header-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0px;
            box-sizing: border-box;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            transition: transform 0.3s;
        }
        .logo:hover {
            transform: translateY(-2px);
        }
        .logo i {
            color: #3B82F6;
            font-size: 28px;
        }
        .logo h1 {
            font-size: 22px;
            font-weight: 600;
            color: #3B82F6;
            margin: 0;
            letter-spacing: 0.5px;
        }
        .logo a {
            text-decoration: none;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 20px;
            margin: 0;
            padding: 0;
        }
        nav a {
            color: #6B7280;
            text-decoration: none;
            transition: color 0.3s;
        }

        nav a:hover {
            color: #3B82F6;
        }       



h1 {
    color: #3B82F6;
    text-align: center;
    font-size: 1.6rem;
    margin: 10px 0;
}
h2 {
    color: #6B7280;
    text-align: center;
    font-size: 1.0rem;
    margin: 5px 0;
}


.project-info {
    margin-bottom: 5px;
    padding: 10px;
    background-color: #ffffff;
    border-radius: 5px;
}
.info-item {
    margin-bottom: 15px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    font-size: 13px;
    color: #333;
}
.info-label {
    font-weight: bold;
    width: 100%;
    margin-bottom: 5px;
    font-size: 13px;
    color: #333;
}
.btn {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 8px 15px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 13px;
    transition: background-color 0.3s;
    margin: 5px;
    white-space: nowrap;
}
.btn:hover {
    background-color: #2980b9;
}
.btn-primary {
    background-color: #3B82F6;
}
.btn-primary:hover {
    background-color: #2563eb;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin: 10px 0;
    font-size: 13px;
}
th, td {
    border: 1px solid #ddd;
    padding: 8px;
    text-align: center;
    word-break: break-word;
}
th {
    background-color: #ffffff;
    color: #333;
    font-size: 13px;
}
tr:nth-child(even) {
    background-color: #ffffff;
}
.results {
    margin-top: 20px;
}
.result-item {
    display: flex;
    flex-wrap: wrap;
    margin-bottom: 10px;
    padding: 8px;
    background-color: #e8f4fc;
    border-radius: 5px;
}
.result-label {
    font-weight: bold;
    width: 100%;
    margin-bottom: 5px;
}
input[type="text"], input[type="number"], select {
    padding: 5px;
    border: 1px solid #ddd;
    border-radius: 4px;
    width: 1000px;
    max-width: 259.7px;
    box-sizing: border-box;
    font-size: 0.8rem;
}
.formula-note {
    font-size: 0.8rem;
    color: #666;
    margin-top: 5px;
    width: 100%;
}
.range-input {
    width: 60px;
    max-width: 100%;
}
.percent-input {
    width: 60px;
    max-width: 100%;
}
.count-input {
    width: 60px;
    max-width: 100%;
}
.total-percent {
    font-weight: bold;
    color: #2c3e50;
}
#calculation-section {
    display: none;
}
.highlight {
    background-color: #f8d7da;
    font-weight: bold;
}
.k-values-input {
    width: 100%;
    max-width: 250px;
}
.percent-symbol {
    margin-left: 5px;
}
.closest {
    background-color: #d4edda !important;
}
.k-value-result {
    margin-bottom: 15px;
    padding: 10px;
    background-color: #f8f9fa;
    border-radius: 5px;
}
.range-container {
    display: inline-block;
}
.calculation-header {
    background-color: #3498db;
    color: white;
    font-weight: bold;
}
.summary-row {
    background-color: #e8f4fc !important;
    font-weight: bold;
}
.optimal-k {
    background-color: #d4edda !important;
}
.attempt-info {
    text-align: center;
    margin: 10px 0;
    color: #666;
    font-size: 0.8rem;
}
.progress-container {
    width: 100%;
    background-color: #f1f1f1;
    border-radius: 5px;
    margin: 10px 0;
}
.progress-bar {
    height: 20px;
    background-color: #4CAF50;
    border-radius: 4px;
    text-align: center;
    line-height: 20px;
    color: white;
    width: 0%;
    transition: width 0.3s;
    font-size: 0.8rem;
}
.add-range-btn {
    background-color: #f39c12;
}
.add-range-btn:hover {
    background-color: #e67e22;
}
.remove-range-btn {
    background-color: #e74c3c;
}
.remove-range-btn:hover {
    background-color: #c0392b;
}
.range-control-row {
    text-align: right;
    padding: 5px 0;
}
.range-control-buttons {
    display: flex;
    justify-content: flex-end;
    gap: 5px;
}
.summary-row:hover {
    background-color: #d4e6f1 !important;
    cursor: pointer;
}

        footer {
            padding: 23px 0;
            margin-top: 25px;
            color: #333;
            background-color: rgba(255, 255, 255, 0.8);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.0);
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            text-align: center;
            padding: 0 20px;
            box-sizing: border-box;
            font-size: 13px;
        }
        .footer-container p {
            margin: 4px 0;
        }
        .footer-container .contact {
            font-size: 13px;
            color: #6B7280;
        }

/* 移动端调整 */
@media screen and (max-width: 768px) {
    body {
        padding: 5px;
        font-size: 14px;
    }
    .container {
        padding: 10px;
    }
    .info-item {
        flex-direction: column;
        align-items: flex-start;
    }
    .info-label {
        width: 100%;
    }
    input[type="text"], input[type="number"], select {
        width: 100%;
        max-width: none;
    }
    .btn {
        width: 100%;
        margin: 5px 0px;
        padding: 10px;
    }
    table {
        font-size: 0.8rem;
    }
    th, td {
        padding: 6px 4px;
    }
    .k-values-input {
        max-width: none;
    }
    .range-control-buttons {
        justify-content: center;
    }
}