:root {
    --primary-color: #0077cc;
    --secondary-color: #00aaff;
    --dark-color: #1a1a2e;
    --light-color: #f0f0f0;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --card-bg: rgba(255, 255, 255, 0.7);
    --card-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --blur-effect: 10px;
    --card-border: 1px solid rgba(255, 255, 255, 0.4);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
}

body {
    background-color: #f0f4f8;
    color: #333;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(0, 119, 204, 0.08) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(0, 170, 255, 0.09) 0%, transparent 20%),
        linear-gradient(135deg, #f0f4f8 0%, #e4edf5 100%);
    background-attachment: fixed;
    line-height: 1.6;
    padding: 15px;
    padding-bottom: 70px; /* 为固定底部导航栏留出空间 */
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 10px;
}

/* Header Styles */
header {
    position: relative;
    margin-bottom: 20px;
    overflow: hidden;
    border-radius: 16px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1), 
                inset 0 1px 0 rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(var(--blur-effect));
    -webkit-backdrop-filter: blur(var(--blur-effect));
    border: var(--card-border);
}

.header-content {
    position: relative;
    z-index: 2;
    padding: 20px 15px;
    color: white;
    text-align: center;
}

.header-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 119, 204, 0.8), rgba(0, 170, 255, 0.8));
    z-index: 1;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.header-bg:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M54.627 0l.83.828-1.415 1.415L51.8 0h2.827zM5.373 0l-.83.828L5.96 2.243 8.2 0H5.374zM48.97 0l3.657 3.657-1.414 1.414L46.143 0h2.828zM11.03 0L7.372 3.657 8.787 5.07 13.857 0H11.03zm32.284 0L49.8 6.485 48.384 7.9l-7.9-7.9h2.83zM16.686 0L10.2 6.485 11.616 7.9l7.9-7.9h-2.83zm20.97 0l9.315 9.314-1.414 1.414L34.828 0h2.83zM22.344 0L13.03 9.314l1.414 1.414L25.172 0h-2.83zM32 0l12.142 12.142-1.414 1.414L30 .828 17.272 13.556l-1.414-1.414L28 0h4zM.284 0l28 28-1.414 1.414L0 2.544V0h.284zM0 5.373l25.456 25.455-1.414 1.415L0 8.2V5.374zm0 5.656l22.627 22.627-1.414 1.414L0 13.86v-2.83zm0 5.656l19.8 19.8-1.415 1.413L0 19.514v-2.83zm0 5.657l16.97 16.97-1.414 1.415L0 25.172v-2.83zM0 28l14.142 14.142-1.414 1.414L0 30.828V28zm0 5.657L11.314 44.97 9.9 46.386l-9.9-9.9v-2.828zm0 5.657L8.485 47.8 7.07 49.212 0 42.143v-2.83zm0 5.657l5.657 5.657-1.414 1.415L0 47.8v-2.83zm0 5.657l2.828 2.83-1.414 1.413L0 53.456v-2.83zM54.627 60L30 35.373 5.373 60H8.2L30 38.2 51.8 60h2.827zm-5.656 0L30 41.03 11.03 60h2.828L30 43.858 46.142 60h2.83zm-5.656 0L30 46.686 16.686 60h2.83L30 49.515 40.485 60h2.83zm-5.657 0L30 52.343 22.344 60h2.83L30 55.172 34.828 60h2.83zM32 60l-2-2-2 2h4zM59.716 0l-28 28 1.414 1.414L60 2.544V0h-.284zM60 5.373L34.544 30.828l1.414 1.415L60 8.2V5.374zm0 5.656L37.373 33.656l1.414 1.414L60 13.86v-2.83zm0 5.656l-19.8 19.8 1.415 1.413L60 19.514v-2.83zm0 5.657l-16.97 16.97 1.414 1.415L60 25.172v-2.83zM60 28L45.858 42.142l1.414 1.414L60 30.828V28zm0 5.657L48.686 44.97l1.415 1.415 9.9-9.9v-2.828zm0 5.657L51.515 47.8l1.414 1.413 7.07-7.07v-2.83zm0 5.657l-5.657 5.657 1.414 1.415L60 47.8v-2.83zm0 5.657l-2.828 2.83 1.414 1.413L60 53.456v-2.83zM39.9 16.385l1.414-1.414 1.413 1.414-1.414 1.414-1.413-1.414zm-2.83 2.827l1.414-1.413 1.414 1.413-1.413 1.414-1.414-1.414zM44.544 16.385l-1.414 1.414-1.414-1.414 1.414-1.414 1.414 1.414zm-2.83-2.828l-1.413 1.414-1.414-1.414 1.414-1.414 1.414 1.414zM41.715 16.384l-1.414 1.414-1.414-1.414 1.414-1.414 1.414 1.414zm-2.83-2.83l-1.414 1.416-1.414-1.415 1.414-1.414 1.414 1.414zM38.885 16.384l-1.414 1.414-1.414-1.414 1.414-1.414 1.414 1.414zM41.715 19.213l-1.414 1.414-1.414-1.414 1.414-1.414 1.414 1.414zM38.885 19.213l-1.414 1.414-1.414-1.414 1.414-1.414 1.414 1.414zm-2.83-2.83l-1.414 1.415-1.414-1.414 1.414-1.414 1.414 1.414zM36.055 19.213l-1.414 1.414-1.414-1.414 1.414-1.414 1.414 1.414zM33.225 19.213l-1.414 1.414-1.414-1.414 1.414-1.414 1.414 1.414zm-2.83 2.827l-1.414 1.414-1.414-1.414 1.414-1.414 1.414 1.414zM30.395 19.213l-1.414 1.414-1.414-1.414 1.414-1.414 1.414 1.414zm-2.83 2.827l-1.414 1.414-1.414-1.414 1.414-1.414 1.414 1.414z' fill='%23ffffff' fill-opacity='0.1' fill-rule='evenodd'/%3E%3C/svg%3E");
    opacity: 0.7;
}

h1 {
    font-size: 1.8rem;
    margin-bottom: 10px; /* 减小底边距，因为下方没有搜索框 */
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    position: relative;
    display: inline-block;
}

h1:after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 50%;
    height: 3px;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 3px;
}

/* Tool Categories */
.tool-category {
    margin-bottom: 20px;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 16px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06), 
                inset 0 1px 0 rgba(255, 255, 255, 0.8);
    overflow: hidden;
    transition: var(--transition);
    backdrop-filter: blur(var(--blur-effect));
    -webkit-backdrop-filter: blur(var(--blur-effect));
    border: var(--card-border);
}

.tool-category:hover {
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1), 
               inset 0 1px 0 rgba(255, 255, 255, 0.8);
    transform: translateY(-2px);
}

.tool-category h2 {
    padding: 12px;
    color: var(--dark-color);
    background: linear-gradient(to right, rgba(248, 249, 250, 0.7), rgba(233, 236, 239, 0.7));
    border-bottom: 1px solid rgba(238, 238, 238, 0.5);
    font-size: 1rem;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.tool-category h2 i {
    margin-right: 10px;
    color: var(--primary-color);
}

.tools-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
    gap: 12px;
    padding: 12px;
}

/* Tool Cards */
.tool-card {
    position: relative;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 12px;
    padding: 12px;
    display: flex;
    align-items: center;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05), 
               inset 0 1px 0 rgba(255, 255, 255, 0.6);
    cursor: pointer;
    overflow: hidden;
    border: var(--card-border);
    z-index: 1;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.tool-card:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1), 
                0 2px 5px rgba(0, 0, 0, 0.05), 
                inset 0 1px 0 rgba(255, 255, 255, 0.6);
    border-color: rgba(0, 119, 204, 0.3);
}

.tool-card:active {
    transform: translateY(1px) scale(0.98);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1), 
                inset 0 1px 3px rgba(0, 0, 0, 0.1);
}

.tool-card:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-color);
    opacity: 0.7;
    z-index: -1;
}

.tool-card:hover:before {
    width: 100%;
    opacity: 0.05;
    transition: all 0.5s ease;
}

.tool-icon {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    width: 34px;
    height: 34px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 10px;
    flex-shrink: 0;
    color: white;
    font-size: 0.95rem;
    box-shadow: 0 4px 10px rgba(0, 119, 204, 0.3), 
                inset 0 1px 1px rgba(255, 255, 255, 0.4);
}

.tool-info {
    flex: 1;
}

.tool-info h3 {
    margin-bottom: 2px;
    color: var(--dark-color);
    font-size: 0.95rem;
}

.tool-info p {
    color: #666;
    font-size: 0.8rem;
}

.tool-link {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
}

/* Footer */
footer {
    background: rgba(255, 255, 255, 0.7);
    border-radius: 16px;
    padding: 15px;
    margin-top: 20px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05), 
                inset 0 1px 0 rgba(255, 255, 255, 0.5);
    color: #666;
    font-size: 0.85rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    backdrop-filter: blur(var(--blur-effect));
    -webkit-backdrop-filter: blur(var(--blur-effect));
    border: var(--card-border);
    
    /* 添加固定定位，但保持原始布局 */
    position: fixed;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 30px);
    max-width: 1100px;
    z-index: 1000;
}

.system-info {
    display: flex;
    gap: 15px;
}

.status-normal {
    color: var(--success-color);
    font-weight: bold;
}

/* Media Queries */
@media (max-width: 768px) {
    .tools-container {
        /* 修改为两列布局，而不是一列 */
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    
    /* 缩小卡片内边距，以适应两列布局 */
    .tool-card {
        padding: 8px;
    }
    
    .tool-icon {
        width: 28px;
        height: 28px;
        font-size: 0.85rem;
        margin-right: 8px;
    }
    
    .tool-info h3 {
        font-size: 0.9rem;
    }
    
    .tool-info p {
        font-size: 0.75rem;
    }
    
    footer {
        flex-direction: column;
        gap: 10px;
        width: calc(100% - 16px);
        bottom: 8px;
    }
    
    h1 {
        font-size: 1.4rem;
    }
    
    .tool-card {
        padding: 10px;
    }
    
    .tool-icon {
        width: 30px;
        height: 30px;
        font-size: 0.9rem;
    }
    
    .container {
        padding: 0 5px;
    }
    
    .header-content {
        padding: 15px 10px;
    }
    
    body {
        padding: 8px;
    }
}

@media (max-width: 480px) {
    /* 在极小屏幕上保持两列，但进一步减小间距和字体 */
    .tools-container {
        padding: 6px;
        gap: 6px;
    }
    
    .tool-card {
        padding: 6px;
        border-radius: 10px;
    }
    
    .tool-icon {
        width: 24px;
        height: 24px;
        font-size: 0.8rem;
        border-radius: 6px;
        margin-right: 6px;
    }
    
    .tool-info h3 {
        font-size: 0.8rem;
    }
    
    .tool-info p {
        font-size: 0.7rem;
    }
    
    .tool-category h2 {
        font-size: 0.95rem;
        padding: 10px;
    }
    
    .tools-container {
        padding: 8px;
        gap: 8px;
    }
    
    footer {
        padding: 12px 10px;
        width: calc(100% - 12px);
    }
    
    h1 {
        font-size: 1.2rem;
    }
    
    body {
        padding: 6px;
        padding-bottom: 60px;
    }
}

/* 添加专门针对非常小屏幕的优化 */
@media (max-width: 360px) {
    .tool-icon {
        width: 22px;
        height: 22px;
        font-size: 0.75rem;
    }
    
    .tool-info h3 {
        font-size: 0.75rem;
    }
    
    .tool-info p {
        font-size: 0.65rem;
    }
}

/* Animation */
@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(0, 119, 204, 0.4), 
                    inset 0 1px 1px rgba(255, 255, 255, 0.4);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(0, 119, 204, 0), 
                    inset 0 1px 1px rgba(255, 255, 255, 0.4);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(0, 119, 204, 0), 
                    inset 0 1px 1px rgba(255, 255, 255, 0.4);
    }
}

/* 拟物化效果额外样式 */
.neumorphic-inset {
    box-shadow: inset 3px 3px 7px rgba(0, 0, 0, 0.1),
                inset -3px -3px 7px rgba(255, 255, 255, 0.8);
}

.neumorphic-outset {
    box-shadow: 3px 3px 7px rgba(0, 0, 0, 0.1),
                -3px -3px 7px rgba(255, 255, 255, 0.8);
}

/* 添加微妙的纹理效果 */
.texture-effect {
    background-image: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%23000000' fill-opacity='0.03' fill-rule='evenodd'/%3E%3C/svg%3E");
    background-position: center center;
}

/* 添加密码验证模态框样式 */
.auth-modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.6);
}

.auth-modal-content {
    background-color: #fefefe;
    margin: 15% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 400px;
    max-width: 90%;
    border-radius: 6px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.auth-close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.auth-close:hover,
.auth-close:focus {
    color: black;
    text-decoration: none;
}

.auth-form {
    margin: 20px 0;
    display: flex;
    gap: 10px;
}

.auth-form input {
    flex: 1;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.auth-form button {
    padding: 10px 15px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.auth-form button:hover {
    background-color: #45a049;
}

.auth-error {
    color: #f44336;
    margin-top: 10px;
}

/* 注销按钮容器 */
.logout-container {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 100;
}

/* 危险按钮样式 */
.btn-danger {
    background-color: #dc3545;
    color: white;
    border: none;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
}

.btn-danger:hover {
    background-color: #c82333;
}