/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-blue: #1a3a5c;
    --secondary-blue: #2c5f8d;
    --gold: #D4AF37;
    --light-gold: #F4D03F;
    --white: #ffffff;
    --light-gray: #f8f9fa;
    --gray: #e9ecef;
    --text-dark: #333;
    --text-light: #666;
    --success: #28a745;
    --error: #e74c3c;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--light-gray);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    background: var(--primary-blue);
    padding: 15px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-img {
    height: 50px;
}

.back-home {
    color: white;
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    font-size: 14px;
}

.back-home:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(-5px);
}

/* 页面头部 */
.page-header {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: white;
    padding: 60px 20px;
    text-align: center;
}

.page-header h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 10px;
    font-family: 'Playfair Display', serif;
}

.header-subtitle {
    font-size: 18px;
    opacity: 0.9;
    font-style: italic;
    margin-bottom: 10px;
}

.header-tagline {
    font-size: 16px;
    opacity: 0.8;
    margin-bottom: 25px;
}

.budget-notice {
    display: inline-block;
    background: linear-gradient(135deg, var(--gold) 0%, var(--light-gold) 100%);
    color: var(--primary-blue);
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 18px;
    box-shadow: 0 5px 20px rgba(212, 175, 55, 0.3);
}

/* 主内容区 */
.main-content {
    padding: 60px 20px;
}

/* 标签切换 */
.tabs-container {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-bottom: 40px;
}

.tab-btn {
    padding: 15px 40px;
    background: white;
    border: 2px solid var(--gray);
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    border-color: var(--secondary-blue);
    transform: translateY(-2px);
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: white;
    border-color: var(--primary-blue);
}

.tab-content {
    display: none;
    background: white;
    border-radius: 20px;
    padding: 50px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* AI问诊介绍 */
.diagnosis-intro,
.inquiry-intro {
    text-align: center;
    margin-bottom: 50px;
}

.diagnosis-intro h2,
.inquiry-intro h2 {
    font-size: 36px;
    color: var(--primary-blue);
    margin-bottom: 15px;
}

.intro-text {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto 30px;
}

.diagnosis-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 25px;
    margin-top: 40px;
}

.feature-item {
    text-align: center;
    padding: 25px;
    background: var(--light-gray);
    border-radius: 15px;
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 48px;
    display: block;
    margin-bottom: 15px;
}

.feature-item h3 {
    font-size: 18px;
    color: var(--primary-blue);
    margin-bottom: 8px;
}

.feature-item p {
    font-size: 14px;
    color: var(--text-light);
}

/* 表单样式 */
.diagnosis-form,
.inquiry-form {
    max-width: 900px;
    margin: 0 auto;
}

.form-section {
    margin-bottom: 50px;
}

.section-title {
    font-size: 24px;
    color: var(--primary-blue);
    margin-bottom: 10px;
    padding-bottom: 10px;
    border-bottom: 3px solid var(--gold);
}

.section-desc {
    color: var(--text-light);
    font-size: 15px;
    margin-bottom: 30px;
    line-height: 1.6;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 15px;
}

.required {
    color: var(--error);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--gray);
    border-radius: 10px;
    font-size: 15px;
    font-family: inherit;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-blue);
    box-shadow: 0 0 0 4px rgba(44, 95, 141, 0.1);
}

.form-group textarea {
    resize: vertical;
}

/* 问诊问题块 */
.diagnosis-questions {
    background: linear-gradient(135deg, #f0f7ff 0%, #e6f2ff 100%);
    padding: 40px;
    border-radius: 15px;
}

.question-block {
    background: white;
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 30px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.question-block:hover {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.question-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.question-number {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
    flex-shrink: 0;
}

.question-title {
    font-size: 20px;
    color: var(--primary-blue);
    font-weight: 600;
}

.question-prompt {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.6;
    margin-bottom: 15px;
    padding: 15px;
    background: var(--light-gray);
    border-radius: 8px;
    border-left: 3px solid var(--gold);
}

.question-block textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid var(--gray);
    border-radius: 10px;
    font-size: 15px;
    line-height: 1.8;
    font-family: inherit;
    resize: vertical;
    min-height: 150px;
    transition: all 0.3s ease;
}

.question-block textarea:focus {
    outline: none;
    border-color: var(--secondary-blue);
    box-shadow: 0 0 0 4px rgba(44, 95, 141, 0.1);
}

.char-counter {
    text-align: right;
    font-size: 13px;
    color: var(--text-light);
    margin-top: 5px;
}

.char-counter .current {
    font-weight: 600;
    color: var(--secondary-blue);
}

/* 复选框和单选框 */
.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
    margin-top: 10px;
}

.checkbox-item,
.radio-item {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    background: var(--light-gray);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.checkbox-item:hover,
.radio-item:hover {
    background: #e6f2ff;
    border-color: var(--secondary-blue);
}

.checkbox-item input,
.radio-item input {
    width: auto;
    margin-right: 10px;
    cursor: pointer;
}

.checkbox-item span,
.radio-item span {
    font-size: 14px;
    color: var(--text-dark);
}

.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 10px;
}

/* 预算选择器 */
.budget-selector {
    background: var(--light-gray);
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 25px;
}

.budget-display {
    text-align: center;
    margin-bottom: 25px;
}

.budget-amount {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 5px;
}

.budget-note {
    font-size: 14px;
    color: var(--text-light);
}

.budget-slider {
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: linear-gradient(to right, var(--gold) 0%, var(--primary-blue) 100%);
    outline: none;
    -webkit-appearance: none;
    cursor: pointer;
    margin-bottom: 10px;
}

.budget-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--primary-blue);
    cursor: pointer;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.budget-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.budget-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--primary-blue);
    cursor: pointer;
    border: none;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
}

.budget-labels {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-light);
}

.budget-reference {
    background: white;
    padding: 20px;
    border-radius: 10px;
    border-left: 4px solid var(--gold);
}

.budget-reference h4 {
    color: var(--primary-blue);
    margin-bottom: 15px;
    font-size: 16px;
}

.budget-reference ul {
    list-style: none;
}

.budget-reference li {
    padding: 8px 0;
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.6;
}

.budget-reference strong {
    color: var(--primary-blue);
}

/* 隐私声明 */
.privacy-notice {
    background: #fff9e6;
    border: 2px solid var(--gold);
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 30px;
}

.privacy-notice h4 {
    color: var(--primary-blue);
    margin-bottom: 15px;
    font-size: 18px;
}

.privacy-notice ul {
    list-style: none;
}

.privacy-notice li {
    padding: 8px 0;
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.6;
    position: relative;
    padding-left: 20px;
}

.privacy-notice li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--gold);
    font-weight: bold;
}

/* 提交按钮 */
.submit-btn {
    width: 100%;
    padding: 18px 40px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: #212241;
}

.submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(26, 58, 92, 0.5);
}

.submit-btn:active {
    transform: translateY(0);
}

.btn-icon {
    font-size: 24px;
    transition: transform 0.3s ease;
}

.submit-btn:hover .btn-icon {
    transform: translateX(5px);
}

/* 成功消息 */
.success-message {
    display: none;
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
    border: 3px solid var(--success);
    border-radius: 15px;
    padding: 40px;
    text-align: center;
    margin-top: 30px;
}

.success-message.show {
    display: block;
    animation: slideIn 0.5s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.success-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.success-message h3 {
    color: var(--primary-blue);
    font-size: 28px;
    margin-bottom: 15px;
}

.success-message p {
    color: var(--text-light);
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 10px;
}

.success-message strong {
    color: var(--primary-blue);
}

.success-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 25px;
}

.btn-primary,
.btn-secondary {
    padding: 12px 30px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: white;
}

.btn-secondary {
    background: white;
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

.btn-primary:hover,
.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* 页脚 */
.footer {
    background: var(--primary-blue);
    color: white;
    padding: 40px 20px 20px;
    margin-top: 80px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.footer-logo {
    height: 50px;
    margin-bottom: 10px;
}

.footer-info p {
    font-size: 14px;
    opacity: 0.9;
}

.footer-contact h4 {
    margin-bottom: 10px;
    font-size: 16px;
}

.footer-contact p {
    font-size: 14px;
    opacity: 0.9;
    margin: 5px 0;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 13px;
    opacity: 0.8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .page-header h1 {
        font-size: 32px;
    }

    .tabs-container {
        flex-direction: column;
    }

    .tab-btn {
        width: 100%;
    }

    .tab-content {
        padding: 30px 20px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .diagnosis-features {
        grid-template-columns: 1fr;
    }

    .checkbox-grid {
        grid-template-columns: 1fr;
    }

    .radio-group {
        flex-direction: column;
    }

    .diagnosis-questions {
        padding: 20px;
    }

    .question-block {
        padding: 20px;
    }

    .question-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .budget-amount {
        font-size: 36px;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }

    .success-actions {
        flex-direction: column;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .page-header {
        padding: 40px 15px;
    }

    .page-header h1 {
        font-size: 28px;
    }

    .budget-notice {
        font-size: 14px;
        padding: 10px 20px;
    }

    .diagnosis-intro h2,
    .inquiry-intro h2 {
        font-size: 28px;
    }

    .question-number {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }

    .question-title {
        font-size: 18px;
    }
}