/* ============================================
   询盘表单系统 - 前端样式
   风格：简单大气
   ============================================ */

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

:root {
    --primary-color: #2c3e50;
    --primary-hover: #1a252f;
    --accent-color: #3498db;
    --accent-hover: #2980b9;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-light: #95a5a6;
    --bg-page: #f5f7fa;
    --bg-card: #ffffff;
    --border-color: #e1e8ed;
    --border-focus: #3498db;
    --success-color: #27ae60;
    --error-color: #e74c3c;
    --warning-color: #f39c12;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-page);
    min-height: 100vh;
}

.page-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ---------- Header ---------- */
.site-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #34495e 100%);
    color: #fff;
    padding: 60px 0 50px;
    text-align: center;
}

.site-title {
    font-size: 32px;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.site-subtitle {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.75);
    font-weight: 300;
}

/* ---------- Main ---------- */
.main-content {
    flex: 1;
    padding: 40px 0 60px;
}

.form-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 40px;
    margin-top: -60px;
    position: relative;
    z-index: 1;
}

.form-header {
    text-align: center;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.form-header h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-header p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ---------- Form ---------- */
.inquiry-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.required {
    color: var(--error-color);
    margin-left: 2px;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="number"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 14px;
    font-size: 14px;
    font-family: inherit;
    color: var(--text-primary);
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%237f8c8d' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
}

/* Radio & Checkbox */
.radio-group,
.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.radio-item,
.checkbox-item {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-primary);
}

.radio-item input,
.checkbox-item input {
    cursor: pointer;
}

/* ---------- Buttons ---------- */
.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 12px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    font-size: 14px;
    font-family: inherit;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    line-height: 1.5;
}

.btn-primary {
    background: var(--accent-color);
    color: #fff;
}

.btn-primary:hover {
    background: var(--accent-hover);
}

.btn-outline {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

.btn-lg {
    padding: 12px 32px;
    font-size: 15px;
}

.form-actions .btn {
    flex: 1;
}

/* ---------- Alert ---------- */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    margin-bottom: 24px;
    border-left: 4px solid;
}

.alert-success {
    background: #eafaf1;
    color: var(--success-color);
    border-color: var(--success-color);
}

.alert-error {
    background: #fdedec;
    color: var(--error-color);
    border-color: var(--error-color);
}

.alert-warning {
    background: #fef5e7;
    color: var(--warning-color);
    border-color: var(--warning-color);
}

/* ---------- Footer ---------- */
.site-footer {
    background: var(--primary-color);
    color: rgba(255, 255, 255, 0.6);
    text-align: center;
    padding: 24px 0;
    font-size: 13px;
}

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
    .site-header {
        padding: 40px 0 40px;
    }
    .site-title {
        font-size: 24px;
    }
    .form-card {
        padding: 24px 20px;
        margin-top: -40px;
    }
    .form-header h2 {
        font-size: 20px;
    }
    .form-actions {
        flex-direction: column;
    }
}