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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

/* 导航栏样式 */
.header {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.nav {
    max-width: 1200px;
    margin: 0 auto;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
}

.nav-logo a {
    font-size: 1.5rem;
    font-weight: bold;
    color: #00838F;
    text-decoration: none;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: #666;
    cursor: pointer;
}

.nav-menu ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-menu li {
    margin: 0 1rem;
}

.nav-menu a {
    color: #666;
    text-decoration: none;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: #00838F;
}

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

.login-btn, .register-btn {
    padding: 0.5rem 1rem;
    border-radius: 4px;
    text-decoration: none;
    transition: all 0.3s;
}

.login-btn {
    color: #00838F;
    border: 1px solid #00838F;
}

.register-btn {
    color: #fff;
    background-color: #00838F;
    border: 1px solid #00838F;
}

.login-btn:hover {
    background-color: rgba(0, 131, 143, 0.1);
}

.register-btn:hover {
    background-color: #006064;
}

/* 主要内容区样式 */
main {
    margin-top: 60px;
    padding: 2rem 0;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1rem;
}

h1 {
    text-align: center;
    color: #00838F;
    margin-bottom: 0.5rem;
}

.subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 2rem;
}

/* 计算器容器样式 */
.calculator-container {
    background-color: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    padding: 2rem;
    margin-bottom: 2rem;
}

/* 标签页样式 */
.calculator-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid #eee;
}

.tab-btn {
    padding: 0.8rem 1.5rem;
    border: none;
    background: none;
    color: #666;
    cursor: pointer;
    font-size: 1rem;
    border-bottom: 2px solid transparent;
    transition: all 0.3s;
}

.tab-btn:hover {
    color: #00838F;
}

.tab-btn.active {
    color: #00838F;
    border-bottom-color: #00838F;
}

/* 输入区域样式 */
.input-section {
    margin-bottom: 2rem;
}

.input-section h3 {
    color: #00838F;
    margin-bottom: 1rem;
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #333;
}

.input-group input,
.input-group select {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: #00838F;
}

/* 保险项目列表样式 */
.insurance-list {
    display: grid;
    gap: 1rem;
}

.insurance-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background-color: #E0F7FA;
    border-radius: 4px;
}

.insurance-item label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.insurance-item select {
    width: auto;
    padding: 0.5rem;
}

/* 按钮样式 */
.calculate-btn {
    width: 100%;
    padding: 1rem;
    background-color: #00838F;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
}

.calculate-btn:hover {
    background-color: #006064;
}

/* 结果显示样式 */
.result {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: #E0F7FA;
    border-radius: 8px;
}

.result h3 {
    color: #00838F;
    margin-bottom: 1rem;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.result-item {
    padding: 1rem;
    background-color: #fff;
    border-radius: 4px;
    text-align: center;
    transition: transform 0.3s;
}

.result-item:hover {
    transform: translateY(-5px);
}

.result-item .label {
    color: #666;
    font-size: 0.9rem;
}

.result-item .value {
    display: block;
    color: #00838F;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0.5rem 0;
}

.result-item .unit {
    color: #666;
    font-size: 0.9rem;
}

/* 使用说明样式 */
.tips-container {
    background-color: #fff;
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    min-height: 420px;
}

.tips-container h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #00838F;
    margin-bottom: 1.5rem;
}

.tips-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.tip-card {
    display: flex;
    gap: 1rem;
    padding: 1.8rem;
    background-color: #E0F7FA;
    border-radius: 8px;
    transition: transform 0.3s;
    min-height: 120px;
}

.tip-card:hover {
    transform: translateY(-3px);
}

.tip-icon {
    font-size: 1.5rem;
}

.tip-text h4 {
    color: #00838F;
    margin-bottom: 0.5rem;
}

.tip-text p {
    color: #666;
    font-size: 0.9rem;
    line-height: 1.6;
    margin-top: 0.5rem;
}

.tip-note {
    margin-top: 2rem;
    padding: 1.2rem;
    background-color: #E0F7FA;
    border-left: 4px solid #00838F;
    border-radius: 4px;
}

/* 广告容器样式 */
.ad-container {
    width: 100%;
    max-width: 800px;
    margin: 20px auto;
    padding: 0 15px;
}

.ad-content {
    border: 1px dashed #ccc;
    padding: 40px;
    border-radius: 4px;
    text-align: center;
    color: #666;
    font-size: 14px;
    background-color: #fff;
}

/* 底部版权样式 */
.footer {
    background-color: #fff;
    padding: 1.5rem 0;
    text-align: center;
    box-shadow: 0 -2px 4px rgba(0,0,0,0.1);
    margin-top: 2rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.footer p {
    margin: 0.5rem 0;
    color: #666;
    font-size: 0.9rem;
}

.footer a {
    color: #666;
    text-decoration: none;
    transition: color 0.3s;
}

.footer a:hover {
    color: #00838F;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: #fff;
        padding: 1rem;
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    }

    .nav-menu.active {
        display: block;
    }

    .nav-menu ul {
        flex-direction: column;
    }

    .nav-menu li {
        margin: 0.5rem 0;
    }

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

    .tab-btn {
        width: 100%;
        text-align: center;
    }

    .insurance-item {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

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

    .tips-content {
        grid-template-columns: 1fr;
    }
}