.breadcrumb {
    margin-bottom: 2rem;
    color: #666;
}

.breadcrumb a {
    color: #1a73e8;
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.converter-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

.input-section {
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.settings {
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.settings label {
    font-weight: 500;
    color: #333;
    min-width: 120px;
}

.settings input {
    width: 100px;
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.converter {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.converter input {
    flex: 1;
    padding: 1rem;
    font-size: 1.2rem;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    transition: border-color 0.3s;
}

.converter input:focus {
    border-color: #1a73e8;
    outline: none;
}

.button-group {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.btn {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    min-width: 120px;
}

.btn-primary {
    background-color: #1a73e8;
    color: white;
}

.btn-primary:hover {
    background-color: #1557b0;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: #f8f9fa;
    color: #1a73e8;
    border: 1px solid #1a73e8;
}

.btn-secondary:hover {
    background-color: #e8f0fe;
    transform: translateY(-2px);
}

.result-section {
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.result-display {
    font-size: 3rem;
    font-weight: 700;
    color: #1a73e8;
    margin-bottom: 1rem;
    padding: 2rem;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.unit {
    font-size: 0.8em;
    color: #666;
    margin-left: 0.5rem;
}

.formula-display {
    color: #666;
    font-size: 1.1rem;
    margin-top: 1rem;
}

.conversion-info {
    background: #fff;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.conversion-info h2 {
    color: #1a73e8;
    margin-bottom: 1rem;
}

.conversion-examples {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.conversion-examples li {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 6px;
    text-align: center;
}

.usage-notes, .tips {
    margin-top: 2rem;
}

.usage-notes h3, .tips h3 {
    color: #1a73e8;
    margin-bottom: 1rem;
}

.usage-notes ol, .tips ul {
    padding-left: 1.5rem;
    line-height: 1.8;
}

.introduction h2,
.usage-guide h2,
.examples-section h2,
.tips-section h2,
.notes-section h2 {
    color: #007bff;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.introduction,
.usage-guide,
.examples-section,
.tips-section,
.notes-section {
    background: #fff;
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.introduction p {
    margin-bottom: 1rem;
    line-height: 1.6;
}

.usage-guide ol {
    padding-left: 1.2rem;
    margin-bottom: 0;
}

.usage-guide li {
    margin-bottom: 0.5rem;
}

.conversion-examples {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.conversion-examples li {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 6px;
    text-align: center;
}

.tips-list,
.notes-list {
    padding-left: 0;
    list-style: none;
}

.tips-list li,
.notes-list li {
    margin-bottom: 1rem;
    line-height: 1.6;
}

.tips-list strong {
    color: #333;
    display: block;
    margin-bottom: 0.5rem;
}

/* 移动端响应式样式 */
@media (max-width: 768px) {
    .converter-container {
        padding: 1rem;
    }

    .input-section {
        padding: 1.5rem 1rem;
    }

    .settings {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }

    .settings label {
        min-width: auto;
    }

    .settings input {
        width: 100%;
    }

    .converter {
        flex-direction: column;
        gap: 0.5rem;
    }

    .converter input {
        width: 100%;
        font-size: 1.1rem;
        padding: 0.8rem;
    }

    .button-group {
        flex-direction: column;
        gap: 0.8rem;
    }

    .btn {
        width: 100%;
        padding: 0.8rem;
        font-size: 1rem;
    }

    .result-display {
        font-size: 2.5rem;
        padding: 1.5rem 1rem;
    }

    .formula-display {
        font-size: 1rem;
    }

    .conversion-info {
        padding: 1.5rem 1rem;
    }

    .conversion-examples {
        grid-template-columns: 1fr;
    }

    .conversion-examples li {
        font-size: 1rem;
    }
}

/* 小屏幕设备优化 */
@media (max-width: 480px) {
    .result-display {
        font-size: 2rem;
    }

    h1 {
        font-size: 1.5rem;
    }

    .conversion-info h2 {
        font-size: 1.3rem;
    }

    .breadcrumb {
        font-size: 0.9rem;
    }

    .unit-info p {
        font-size: 0.9rem;
    }
}

/* 暗色模式支持 */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #1a1a1a;
        color: #e0e0e0;
    }

    .input-section,
    .result-display,
    .conversion-info {
        background: #2d2d2d;
        box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    }

    .converter input {
        background: #1a1a1a;
        border-color: #404040;
        color: #e0e0e0;
    }

    .converter input:focus {
        border-color: #4a8cff;
    }

    .btn-secondary {
        background-color: #2d2d2d;
        border-color: #4a8cff;
        color: #4a8cff;
    }

    .btn-secondary:hover {
        background-color: #353535;
    }

    .conversion-examples li {
        background: #353535;
    }

    .settings label {
        color: #e0e0e0;
    }

    .unit {
        color: #999;
    }

    .formula-display {
        color: #999;
    }
}