:root {
    --primary-color: #0b81cb;
    --secondary-color: #a8c6d9;
    --background-color: #f5f9fc;
    --text-color: #2c3e50;
    --border-color: #d1e3f0;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    background-color: var(--background-color);
    color: var(--text-color);
    min-height: 100vh;
}

.page-wrap {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    max-width: 900px;
    margin: 0 auto;
    padding: 1.25rem 1.5rem 0;
}

/* 顶部：左上角 logo + 中英文标题 */
.site-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-bottom: 1.25rem;
    margin-bottom: 1.25rem;
    border-bottom: 2px solid var(--border-color);
    flex-shrink: 0;
}

.site-logo {
    width: 72px;
    height: 72px;
    object-fit: contain;
    flex-shrink: 0;
}

.site-titles {
    flex: 1;
    min-width: 0;
}

.site-title-zh {
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.35;
    margin-bottom: 0.25rem;
}

.site-title-en {
    color: #6a8dad;
    font-size: 0.95rem;
    font-weight: 400;
    font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    letter-spacing: 0.02em;
}

/* 计算器主体 */
.calculator-main {
    flex: 1;
    width: 100%;
}

.calculator-panel {
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 0 20px rgba(59, 109, 140, 0.08);
    padding: 1.75rem 2rem;
}

.page-heading {
    color: var(--primary-color);
    font-size: 1.35rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.result-heading {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: 1rem;
    text-align: center;
    font-weight: 600;
}

.question {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
    font-weight: 500;
}

input,
select {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    background-color: white;
    transition: border-color 0.3s ease;
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 2px rgba(168, 198, 217, 0.2);
}

small {
    display: block;
    margin-top: 0.5rem;
    color: #6a8dad;
    font-size: 0.9rem;
}

button {
    width: 100%;
    padding: 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #2c5876;
}

.hidden {
    display: none;
}

.result-content {
    padding: 0.5rem 0;
}

.risk-level {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 4px;
    text-align: center;
    font-weight: 500;
}

.recommendations {
    margin-top: 1rem;
    padding: 1.5rem;
    background-color: var(--background-color);
    border-radius: 8px;
}

.recommendations h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.recommendations ul {
    list-style-type: none;
    padding-left: 0;
}

.recommendations li {
    margin-bottom: 0.8rem;
    padding-left: 1.5rem;
    position: relative;
}

.recommendations li:before {
    content: "•";
    color: var(--secondary-color);
    position: absolute;
    left: 0;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--border-color);
    border-radius: 4px;
    margin-bottom: 2rem;
    position: relative;
}

.progress {
    height: 100%;
    background-color: var(--secondary-color);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.progress-bar span {
    position: absolute;
    right: 0;
    top: -20px;
    font-size: 0.9rem;
    color: var(--text-color);
}

.button-group {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.button-group button {
    flex: 1;
}

.back-btn {
    background-color: var(--secondary-color);
    color: var(--primary-color);
}

.back-btn:hover {
    background-color: #97b5c9;
}

.restart-btn {
    background-color: var(--primary-color);
    margin-top: 1rem;
}

.result-number {
    font-size: 1.5rem;
    font-weight: bold;
    text-align: center;
    margin: 1.5rem 0;
}

.section-title {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.question-section {
    background-color: var(--background-color);
    padding: 1.5rem;
    border-radius: 8px;
}

.breakdown {
    background-color: var(--background-color);
    padding: 1rem 1.25rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.breakdown h3 {
    color: var(--primary-color);
    margin-bottom: 0.75rem;
    font-size: 1rem;
}

.breakdown ul {
    margin-left: 1.25rem;
}

.breakdown li {
    margin-bottom: 0.35rem;
}

/* 页脚版权 */
.site-footer {
    flex-shrink: 0;
    margin-top: 2rem;
    padding: 1.25rem 0 1.5rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.site-footer p {
    font-size: 0.85rem;
    color: #6a8dad;
    letter-spacing: 0.03em;
}

@media (max-width: 600px) {
    .page-wrap {
        padding: 1rem 1rem 0;
    }

    .site-header {
        align-items: flex-start;
    }

    .site-logo {
        width: 56px;
        height: 56px;
    }

    .site-title-zh {
        font-size: 1.2rem;
    }

    .site-title-en {
        font-size: 0.85rem;
    }

    .calculator-panel {
        padding: 1.25rem 1rem;
    }
}