/* ========== 基础变量 ========== */
:root { 
    --primary: #10b981;
    --primary-dark: #059669;
    --primary-light: #d1fae5;
    --accent: #0ea5e9;
    --warning: #f59e0b;
    --bg: #f0f9ff;
    --card: #ffffff;
    --text: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    --shadow: 0 4px 24px -4px rgba(16, 185, 129, 0.12);
    --shadow-lg: 0 12px 40px -8px rgba(16, 185, 129, 0.2);
    --radius: 16px;
    --radius-sm: 10px;
}

* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body { 
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 50%, #f0fdf4 100%);
    background-attachment: fixed;
    color: var(--text);
    padding: 16px;
    line-height: 1.6;
    margin: 0;
    font-size: 14px;
    min-height: 100vh;
}

/* ========== 容器布局 ========== */
.container { 
    max-width: 1080px; 
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* ========== 头部标题 ========== */
.header {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, #10b981 0%, #0ea5e9 100%);
    border-radius: var(--radius);
    padding: 24px 20px;
    text-align: center;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 300px;
    height: 300px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
}

.header::after {
    content: '';
    position: absolute;
    bottom: -60%;
    left: -10%;
    width: 200px;
    height: 200px;
    background: rgba(255,255,255,0.08);
    border-radius: 50%;
}

h1 { 
    color: #fff;
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    position: relative;
    z-index: 1;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header-subtitle {
    color: rgba(255,255,255,0.9);
    font-size: 0.85rem;
    margin-top: 6px;
    position: relative;
    z-index: 1;
}

/* ========== 卡片样式 ========== */
.card { 
    background: var(--card);
    padding: 20px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid rgba(255,255,255,0.8);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

.full-width { 
    grid-column: 1 / -1; 
}

/* ========== 区块标题 ========== */
h2 { 
    font-size: 1rem;
    margin: 0 0 16px 0;
    padding-bottom: 12px;
    color: var(--text);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    border-bottom: none;
    position: relative;
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 50%, transparent 100%);
    border-radius: 2px;
}

.section-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    border-radius: 8px;
    color: #fff;
    font-size: 0.85rem;
    margin-right: 10px;
    flex-shrink: 0;
}

h2 > span:first-child {
    display: flex;
    align-items: center;
}

/* ========== 表单样式 ========== */
.form-group { 
    margin-bottom: 16px; 
}

label { 
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text);
}

input, select { 
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    box-sizing: border-box;
    font-size: 16px;
    background-color: #f8fafc;
    color: var(--text);
    transition: all 0.2s;
    -webkit-appearance: none;
    appearance: none;
}

input:hover, select:hover {
    border-color: #cbd5e1;
    background-color: #fff;
}

input:focus, select:focus { 
    outline: none;
    border-color: var(--primary);
    background-color: #fff;
    box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.1);
}

input[readonly] {
    background-color: #f1f5f9;
    color: var(--text-light);
    cursor: not-allowed;
}

select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 44px;
    cursor: pointer;
}

.hint { 
    font-size: 0.75rem;
    color: var(--text-light);
    margin-top: 6px;
    line-height: 1.5;
    display: flex;
    align-items: flex-start;
    gap: 4px;
}

.hint::before {
    content: '💡';
    font-size: 0.7rem;
}

/* ========== 补贴说明框 ========== */
.subsidy-info { 
    background: linear-gradient(135deg, #f0fdf4 0%, #ecfdf5 100%);
    border: 1px solid #a7f3d0;
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    color: #047857;
    line-height: 1.7;
}

.subsidy-info strong { 
    color: #065f46;
    font-weight: 600;
}

.subsidy-info ul {
    margin: 10px 0 0 0;
    padding-left: 0;
    list-style: none;
}

.subsidy-info li {
    margin-bottom: 6px;
    padding-left: 20px;
    position: relative;
}

.subsidy-info li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

/* ========== 开关切换 ========== */
.toggle-container { 
    background: #f1f5f9;
    padding: 4px;
    border-radius: 10px;
    display: inline-flex;
    flex-shrink: 0;
}

.toggle-btn { 
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.8rem;
    border: none;
    background: transparent;
    color: var(--text-light);
    cursor: pointer;
    transition: all 0.25s;
    white-space: nowrap;
    font-weight: 500;
}

.toggle-btn:hover {
    color: var(--text);
}

.toggle-btn.active { 
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #fff;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

/* ========== 动态年份列表 ========== */
.year-row { 
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 12px;
    padding: 14px;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    transition: all 0.2s;
}

.year-row:hover {
    border-color: var(--primary-light);
    background: linear-gradient(135deg, #fff 0%, #f8fafc 100%);
}

.year-label { 
    grid-column: 1 / -1;
    font-weight: 700;
    color: var(--primary-dark);
    font-size: 0.9rem;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.year-label::before {
    content: '📅';
    font-size: 0.85rem;
}

.year-label.last-year { 
    color: var(--warning);
}

.year-label.last-year::before {
    content: '🎯';
}

.col-header { 
    display: none;
}

.year-row .input-wrapper {
    display: flex;
    flex-direction: column;
}

.year-row .input-label {
    font-size: 0.7rem;
    color: var(--text-light);
    margin-bottom: 6px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.year-row select {
    padding: 10px 14px;
    font-size: 14px;
    background-color: #fff;
}

/* ========== 结果样式 ========== */
.result-box { 
    background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
    border: 1px solid #a7f3d0;
    padding: 18px;
    border-radius: var(--radius-sm);
    text-align: center;
    transition: transform 0.2s;
}

.result-box:hover {
    transform: translateY(-2px);
}

.result-title { 
    font-weight: 600;
    color: var(--primary-dark);
    font-size: 0.85rem;
    margin-bottom: 8px;
}

.result-val { 
    font-size: 1.5rem;
    font-weight: 800;
    color: #065f46;
    letter-spacing: -0.5px;
}

.breakdown { 
    font-size: 0.75rem;
    color: #047857;
    margin-top: 6px;
}

/* ========== 主按钮 ========== */
button.action-btn { 
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: white;
    border: none;
    padding: 16px 28px;
    border-radius: var(--radius-sm);
    font-size: 1.1rem;
    cursor: pointer;
    width: 100%;
    margin-top: 20px;
    transition: all 0.3s;
    font-weight: 700;
    box-shadow: 0 4px 16px rgba(16, 185, 129, 0.3);
    -webkit-appearance: none;
    position: relative;
    overflow: hidden;
}

button.action-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: 0.5s;
}

button.action-btn:hover::before {
    left: 100%;
}

button.action-btn:hover { 
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(16, 185, 129, 0.4);
}

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

/* ========== 结果区域网格 ========== */
.result-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
    margin-bottom: 24px;
}

/* ========== 结果表格 ========== */
.table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 0 -20px;
    padding: 0 20px;
}

.result-table {
    width: 100%;
    min-width: 500px;
    border-collapse: separate;
    border-spacing: 0;
    text-align: left;
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: 0 0 0 1px var(--border);
}

.result-table th {
    padding: 14px 12px;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    border-bottom: 2px solid var(--border);
}

.result-table td {
    padding: 14px 12px;
    border-bottom: 1px solid var(--border);
    background: #fff;
    vertical-align: middle;
}

.result-table tr:last-child td {
    border-bottom: none;
}

.result-table tr:hover td {
    background: #f8fafc;
}

.result-table .sub-text {
    font-size: 0.7rem;
    color: var(--text-light);
    display: block;
    margin-top: 4px;
}

/* ========== 图表容器 ========== */
.charts-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    margin-top: 24px;
}

.chart-box {
    height: 300px;
    position: relative;
    background: #fff;
    border-radius: var(--radius-sm);
    padding: 16px;
    border: 1px solid var(--border);
}

/* ========== 剩余缴费提示 ========== */
#remainingInfo {
    margin-bottom: 16px;
    color: #92400e;
    font-weight: 600;
    font-size: 0.85rem;
    background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid #fde68a;
    display: flex;
    align-items: center;
    gap: 8px;
}

#remainingInfo::before {
    content: '⏰';
    font-size: 1.1rem;
}

#remainingInfo span {
    color: #b45309;
    font-weight: 700;
}

/* ========== 滚动容器 ========== */
#dynamicYearsContainer {
    max-height: 50vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding-right: 8px;
}

#dynamicYearsContainer::-webkit-scrollbar {
    width: 6px;
}

#dynamicYearsContainer::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 3px;
}

#dynamicYearsContainer::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 3px;
}

#dynamicYearsContainer::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* ========== 分隔线 ========== */
.divider {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
    margin: 20px 0;
}

/* ========== 桌面端适配 ========== */
@media (min-width: 769px) { 
    body {
        padding: 24px;
        font-size: 15px;
    }
    
    h1 {
        font-size: 1.75rem;
    }
    
    .header {
        padding: 32px 24px;
    }
    
    .card {
        padding: 24px;
    }
    
    .year-row { 
        grid-template-columns: 100px 1fr 1fr;
        gap: 12px;
        padding: 12px 16px;
        margin-bottom: 8px;
        background: #fff;
        border: 1px solid var(--border);
    }
    
    .year-label {
        grid-column: auto;
        margin-bottom: 0;
        display: flex;
        align-items: center;
    }
    
    .col-header { 
        display: grid;
        grid-template-columns: 100px 1fr 1fr;
        gap: 12px;
        font-size: 0.8rem;
        font-weight: 600;
        color: var(--text-light);
        margin-bottom: 10px;
        padding: 0 16px;
        text-transform: uppercase;
        letter-spacing: 0.5px;
    }
    
    .year-row .input-wrapper {
        flex-direction: row;
        align-items: center;
    }
    
    .year-row .input-label {
        display: none;
    }
    
    .result-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 18px;
    }
    
    .charts-container {
        grid-template-columns: 1fr 1fr;
    }
    
    .chart-box {
        height: 360px;
    }
    
    #dynamicYearsContainer {
        max-height: 420px;
    }
}

/* ========== 小屏手机适配 ========== */
@media (max-width: 768px) { 
    .container { 
        grid-template-columns: 1fr;
    }
}

@media (max-width: 400px) {
    body {
        padding: 10px;
    }
    
    h1 {
        font-size: 1.25rem;
    }
    
    .header {
        padding: 20px 16px;
    }
    
    .card {
        padding: 16px;
    }
    
    h2 {
        font-size: 0.9rem;
    }
    
    .section-icon {
        width: 24px;
        height: 24px;
        font-size: 0.75rem;
    }
    
    .toggle-btn {
        padding: 6px 10px;
        font-size: 0.75rem;
    }
    
    .result-val {
        font-size: 1.3rem;
    }
    
    button.action-btn {
        padding: 14px 20px;
        font-size: 1rem;
    }
}

/* ========== 动画效果 ========== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.card {
    animation: fadeIn 0.4s ease-out;
}

.card:nth-child(2) { animation-delay: 0.1s; }
.card:nth-child(3) { animation-delay: 0.2s; }
.card:nth-child(4) { animation-delay: 0.3s; }