:root {
--primary: #7986CB;
--on-primary: #FFFFFF;
--primary-container: #EADDFF;
--on-primary-container: #21005D;
--secondary: #625B71;
--on-secondary: #FFFFFF;
--secondary-container: #E8DEF8;
--on-secondary-container: #1D192B;
--tertiary: #7D5260;
--on-tertiary: #FFFFFF;
--tertiary-container: #FFD8E4;
--on-tertiary-container: #31111D;
--error: #B3261E;
--on-error: #FFFFFF;
--error-container: #F9DEDC;
--on-error-container: #410E0B;
--background: #FFFBFE;
--on-background: #1C1B1F;
--surface: #FFFBFE;
--on-surface: #1C1B1F;
--surface-variant: #E7E0EC;
--on-surface-variant: #49454F;
--outline: #79747E;
--shadow: #000000;
    
--active: #E57373;
--expired: #66BB6A;
--permanent: #424242;
    
--elevation-1: 0 1px 3px 1px rgba(0, 0, 0, 0.15), 0 1px 2px rgba(0, 0, 0, 0.3);
--elevation-2: 0 2px 6px 2px rgba(0, 0, 0, 0.15), 0 1px 2px rgba(0, 0, 0, 0.3);
--elevation-3: 0 4px 8px 3px rgba(0, 0, 0, 0.15), 0 1px 3px rgba(0, 0, 0, 0.3);
    
--shape-corner-extra-small: 6px;
--shape-corner-small: 8px;
--shape-corner-medium: 12px;
--shape-corner-large: 16px;
--shape-corner-extra-large: 28px;
--shape-corner-full: 999px;
}
 
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
 
body {
    font-family: 'Roboto', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.5;
    color: var(--on-background);
    background-color: var(--background);
-webkit-font-smoothing: antialiased;
    padding: 16px;
}
 
.container {
    max-width: 1200px;
    margin: 0 auto;
}
 
header {
    text-align: center;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--outline);
}
 
h1 {
    color: var(--primary);
    margin-bottom: 8px;
    font-size: 28px;
    font-weight: 400;
}
 
header p {
    color: var(--on-surface-variant);
    font-size: 14px;
    margin: 0;
}
 
.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 24px;
    align-items: center;
}
 
.search-box {
    flex-grow: 1;
    min-width: 240px;
}
 
.filter-box {
    min-width: 160px;
}
 
.maintenance-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}
 
.maintenance-card {
    background: var(--surface);
    border-radius: var(--shape-corner-medium);
    box-shadow: var(--elevation-1);
    padding: 16px;
    transition: all 0.2s ease;
    border: 1px solid var(--surface-variant);
    position: relative;
    overflow: hidden;
}
 
.maintenance-card:hover {
    box-shadow: var(--elevation-2);
    transform: translateY(-2px);
}
 
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--surface-variant);
}
 
.card-date {
    font-weight: 500;
    color: var(--on-surface-variant);
    font-size: 12px;
}
 
.status {
    padding: 4px 12px;
    border-radius: var(--shape-corner-full);
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: white;
}
 
.status.active {
    background-color: var(--active);
}
 
.status.expired {
    background-color: var(--expired);
}
 
.status.permanent {
    background-color: var(--permanent);
}
 
.card-title {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--on-surface);
}
 
.card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
    font-size: 12px;
    color: var(--on-surface-variant);
}
 
.card-content {
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--on-surface);
    line-height: 1.6;
}
 
.time-remaining {
    font-weight: 500;
}
 
/* MD3 文本字段样式 */
.m3-text-field {
    position: relative;
    height: 56px;
    border-radius: var(--shape-corner-extra-small);
    background-color: var(--surface);
    border: 1px solid var(--outline);
    transition: all 0.2s ease;
}
 
.m3-text-field:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 1px var(--primary);
}
 
.m3-text-field input {
    width: 100%;
    height: 100%;
    padding: 16px 16px 0 16px;
    border: none;
    background: transparent;
    font-size: 16px;
    color: var(--on-surface);
    outline: none;
}
 
.m3-text-field label {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--on-surface-variant);
    font-size: 16px;
    pointer-events: none;
    transition: all 0.2s ease;
}
 
.m3-text-field input:focus + label,
.m3-text-field input:not(:placeholder-shown) + label {
    top: 30%;
    font-size: 12px;
    color: var(--primary);
}
 
.m3-text-field .trailing-icon {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 24px;
    height: 24px;
    color: var(--on-surface-variant);
}
 
.m3-text-field .trailing-icon svg {
    width: 100%;
    height: 100%;
    fill: currentColor;
}
 
/* MD3 选择框样式 */
.m3-select {
    position: relative;
    height: 56px;
    border-radius: var(--shape-corner-extra-small);
    background-color: var(--surface);
    border: 1px solid var(--outline);
    transition: all 0.2s ease;
    cursor: pointer;
    user-select: none;
}
 
.m3-select:focus,
.m3-select:focus-visible {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 1px var(--primary);
}
 
.m3-select .selected-option {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 16px;
    font-size: 16px;
    color: var(--on-surface);
}
 
.m3-select .selected-option svg {
    width: 24px;
    height: 24px;
    fill: var(--on-surface-variant);
    transition: transform 0.2s ease;
}
 
.m3-select .options {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    width: 100%;
    background-color: var(--surface);
    border-radius: var(--shape-corner-extra-small);
    box-shadow: var(--elevation-3);
    z-index: 10;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
    max-height: 200px;
    overflow-y: auto;
}
 
.m3-select.open .options {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
 
.m3-select.open .selected-option svg {
    transform: rotate(180deg);
}
 
.m3-select .option {
    padding: 12px 16px;
    font-size: 16px;
    color: var(--on-surface);
    transition: background-color 0.2s ease;
}
 
.m3-select .option:hover {
    background-color: var(--surface-variant);
}
 
/* MD3 按钮样式 */
.m3-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 40px;
    padding: 0 24px;
    border-radius: var(--shape-corner-full);
    background-color: var(--primary);
    color: var(--on-primary);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.1px;
    text-transform: uppercase;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--elevation-1);
}
 
.m3-button:hover {
    box-shadow: var(--elevation-2);
}
 
.m3-button:active {
    box-shadow: var(--elevation-1);
}
 
.m3-button svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}
 
.refresh-btn {
    background-color: transparent;
    color: var(--primary);
    box-shadow: none;
}
 
.refresh-btn:hover {
    background-color: rgba(103, 80, 164, 0.08);
}
 
/* 响应式设计 */
@media (max-width: 768px) {
    .controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box, .filter-box {
        width: 100%;
    }
    
    .maintenance-list {
        grid-template-columns: 1fr;
    }
    
    h1 {
        font-size: 24px;
    }
}
 
@media (max-width: 480px) {
    body {
        padding: 12px;
    }
    
    .maintenance-card {
        padding: 12px;
    }
    
    .card-title {
        font-size: 15px;
    }
    
    .card-content {
        font-size: 13px;
    }
    
    .m3-text-field, .m3-select {
        height: 52px;
    }
}
/* ===== 刷新按钮动画 ===== */
.refresh-btn.refreshing svg {
    animation: rotate 0.8s linear infinite;
}
 
@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
 
/* ===== 卡片重载动画 ===== */
.maintenance-list {
    transition: opacity 0.3s ease;
}
 
.maintenance-card {
    transition: all 0.3s ease;
    animation: cardEnter 0.4s ease-out forwards;
    opacity: 0;
    transform: translateY(10px);
}
 
@keyframes cardEnter {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
 
/* 卡片延迟入场效果 */
.maintenance-card:nth-child(1) { animation-delay: 0.1s; }
.maintenance-card:nth-child(2) { animation-delay: 0.2s; }
.maintenance-card:nth-child(3) { animation-delay: 0.3s; }
.maintenance-card:nth-child(4) { animation-delay: 0.4s; }
.maintenance-card:nth-child(5) { animation-delay: 0.5s; }
 
/* 卡片重载时的缩放效果 */
.card-reloading {
    transform: scale(0.95);
    opacity: 0.7;
    transition: all 0.3s ease;
}
/* ===== 提示框样式 ===== */
.ban-tips {
    background-color: var(--primary-container);
    color: var(--on-primary-container);
    padding: 16px;
    border-radius: var(--shape-corner-medium);
    margin-bottom: 24px;
    border-left: 4px solid var(--primary);
    box-shadow: var(--elevation-1);
    font-size: 14px;
    line-height: 1.6;
}
 
.ban-tips a {
    color: var(--primary);
    font-weight: 500;
    text-decoration: none;
    transition: color 0.2s ease;
}
 
.ban-tips a:hover {
    color: var(--secondary);
    text-decoration: underline;
}
 
.ban-tips strong {
    font-weight: 500;
    color: var(--error);
}