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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* 头部样式 */
.header {
    text-align: center;
    margin-bottom: 3rem;
    opacity: 0;
    transform: translateY(-30px);
    animation: fadeInUp 0.8s ease forwards;
    position: relative;
}

.header h1 {
    font-size: 3rem;
    font-weight: 700;
    color: white;
    margin-bottom: 1rem;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.header p {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.9);
    max-width: 600px;
    margin: 0 auto;
}

/* 卡片网格布局 */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

/* 卡片样式 */
.tool-card {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
    text-decoration: none;
    color: inherit;
    display: block;
    position: relative;
    overflow: hidden;
}

.tool-card::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: left 0.5s ease;
}

.tool-card:hover::before {
    left: 100%;
}

.tool-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.tool-card:nth-child(1) { animation-delay: 0.1s; }

.card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #667eea;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #333;
}

.card-description {
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.card-link {
    display: inline-flex;
    align-items: center;
    color: #667eea;
    font-weight: 500;
    text-decoration: none;
    transition: color 0.3s ease;
}

.card-link:hover {
    color: #764ba2;
}

.card-link::after {
    content: '→';
    margin-left: 0.5rem;
    transition: transform 0.3s ease;
}

.tool-card:hover .card-link::after {
    transform: translateX(5px);
}

/* 动画定义 */
@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .header h1 {
        font-size: 2rem;
    }

    .header p {
        font-size: 1rem;
    }

    .tools-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .tool-card {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.8rem;
    }

    .tool-card {
        padding: 1rem;
    }

    .card-icon {
        font-size: 2.5rem;
    }

    .card-title {
        font-size: 1.3rem;
    }
}

/* 页脚样式 */
.footer {
    text-align: center;
    color: rgba(255,255,255,0.7);
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.2);
}

/* 通知铃铛样式 */
.notification-bell {
    position: absolute;
    top: 0;
    right: 0;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 100;
}

.notification-bell:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.bell-icon {
    width: 24px;
    height: 24px;
    color: white;
    stroke: white;
}

.notification-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: #ff4757;
    color: white;
    font-size: 12px;
    font-weight: bold;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
    animation: pulse 2s infinite;
}

/* 更新公告弹窗样式 */
.update-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.update-modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(3px);
}

.modal-content {
    position: relative;
    background: white;
    border-radius: 20px;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease;
    display: flex;
    flex-direction: column;
}

.modal-header {
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    color: white;
    font-size: 2rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.3s ease;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

.modal-body {
    padding: 2rem;
    flex: 1;
    overflow-y: auto;
}

.update-info {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #eee;
}

.update-version {
    background: #667eea;
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.update-date {
    color: #666;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
}

.update-content {
    line-height: 1.6;
    color: #333;
}

.update-content h3 {
    color: #667eea;
    margin: 1.5rem 0 0.5rem 0;
    font-size: 1.2rem;
}

.update-content ul {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
}

.update-content li {
    margin-bottom: 0.5rem;
}

.update-content p {
    margin-bottom: 1rem;
}

.modal-footer {
    padding: 1.5rem 2rem;
    border-top: 1px solid #eee;
    text-align: right;
}

.btn-read {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 10px 24px;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-read:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

/* 动画 */
@keyframes pulse {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 71, 87, 0.7);
    }
    70% {
        transform: scale(1.05);
        box-shadow: 0 0 0 10px rgba(255, 71, 87, 0);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 71, 87, 0);
    }
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* 响应式设计 - 弹窗 */
@media (max-width: 768px) {
    .modal-content {
        width: 95%;
        max-height: 90vh;
    }
    
    .modal-header {
        padding: 1rem 1.5rem;
    }
    
    .modal-body {
        padding: 1.5rem;
    }
    
    .modal-footer {
        padding: 1rem 1.5rem;
    }
    
    .notification-bell {
        width: 36px;
        height: 36px;
        top: 10px;
        right: 10px;
    }
    
    .bell-icon {
        width: 20px;
        height: 20px;
    }
}

@media (max-width: 480px) {
    .modal-content {
        border-radius: 15px;
    }
    
    .modal-title {
        font-size: 1.3rem;
    }
    
    .update-info {
        flex-direction: column;
        gap: 0.5rem;
    }
}