/* 全局变量 */
:root {
    --primary-color: #3b82f6;
    --primary-light: #60a5fa;
    --primary-dark: #2563eb;
    --secondary-color: #8b5cf6;
    --accent-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --bg-gradient-start: #f0f9ff;
    --bg-gradient-end: #e0e7ff;
    --card-bg: rgba(255, 255, 255, 0.9);
    --card-shadow: 0 10px 40px rgba(59, 130, 246, 0.1);
    --card-shadow-hover: 0 20px 60px rgba(59, 130, 246, 0.2);
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: rgba(59, 130, 246, 0.15);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    min-height: 100vh;
    color: var(--text-primary);
    overflow-x: hidden;
}

/* 背景装饰 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 80%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(6, 182, 212, 0.05) 0%, transparent 40%);
    pointer-events: none;
    z-index: -1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 头部 */
.header {
    padding: 40px 0 30px;
    animation: fadeInDown 0.8s ease-out;
}

.header-content {
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo i {
    font-size: 36px;
    color: var(--primary-color);
    -webkit-text-fill-color: initial;
}

.header-decoration {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 200px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
    opacity: 0.5;
}

/* 主内容区 */
.main-content {
    flex: 1;
    padding: 20px 0 40px;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    padding: 20px 0;
}

/* 卡片样式 */
.card {
    position: relative;
    background: var(--card-bg);
    border-radius: 20px;
    padding: 32px 24px;
    text-decoration: none;
    color: inherit;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    cursor: pointer;
    animation: fadeInUp 0.8s ease-out backwards;
}

.card:nth-child(1) { animation-delay: 0.1s; }
.card:nth-child(2) { animation-delay: 0.2s; }
.card:nth-child(3) { animation-delay: 0.3s; }
.card:nth-child(4) { animation-delay: 0.4s; }

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--card-shadow-hover);
    border-color: var(--primary-light);
}

.card-hover {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg,
        rgba(59, 130, 246, 0.05) 0%,
        rgba(139, 92, 246, 0.05) 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.card:hover .card-hover {
    opacity: 1;
}

.card-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 32px;
    position: relative;
    overflow: hidden;
}

.card-icon::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    opacity: 0.1;
    transition: all 0.4s ease;
}

.card:hover .card-icon::before {
    opacity: 0.2;
}

/* NAS 图标 */
.nas-icon {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    color: #2563eb;
}

.nas-icon::before {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
}

/* Plex 图标 */
.plex-icon {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    color: #d97706;
}

.plex-icon::before {
    background: linear-gradient(135deg, #f59e0b 0%, #b45309 100%);
}

/* Calibre 图标 */
.calibre-icon {
    background: linear-gradient(135deg, #dcfce7 0%, #bbf7d0 100%);
    color: #059669;
}

.calibre-icon::before {
    background: linear-gradient(135deg, #10b981 0%, #047857 100%);
}

/* Study 图标 */
.study-icon {
    background: linear-gradient(135deg, #e0e7ff 0%, #c7d2fe 100%);
    color: #4f46e5;
}

.study-icon::before {
    background: linear-gradient(135deg, #6366f1 0%, #3730a3 100%);
}

.card-content {
    position: relative;
    z-index: 1;
}

.card-content h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.card:hover .card-content h3 {
    color: var(--primary-color);
}

.card-content p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.card-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.card-badge.online {
    background: linear-gradient(135deg, #dcfce7 0%, #bbf7d0 100%);
    color: #059669;
}

.card-badge.local {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    color: #d97706;
}

/* 局域网仅限提示 */
.local-only {
    cursor: pointer;
}

.local-only:hover::after {
    content: '仅限局域网访问';
    position: absolute;
    bottom: 12px;
    right: 12px;
    font-size: 11px;
    color: var(--warning-color);
    background: rgba(254, 243, 199, 0.9);
    padding: 4px 8px;
    border-radius: 6px;
}

/* 底部 */
.footer {
    padding: 30px 0 40px;
    border-top: 1px solid rgba(59, 130, 246, 0.1);
    animation: fadeInUp 0.8s ease-out 0.5s backwards;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-content p {
    font-size: 14px;
    color: var(--text-secondary);
}

.footer-links a {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary-color);
}

/* Toast 提示 */
.toast {
    position: fixed;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: rgba(30, 41, 59, 0.95);
    backdrop-filter: blur(10px);
    color: white;
    padding: 14px 24px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
}

.toast.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.toast.hidden {
    opacity: 0;
    visibility: hidden;
}

.toast i {
    font-size: 20px;
    color: #fbbf24;
}

/* 动画 */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header {
        padding: 30px 0 20px;
    }

    .logo {
        font-size: 24px;
    }

    .logo i {
        font-size: 32px;
    }

    .header-decoration {
        display: none;
    }

    .cards-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .card {
        padding: 24px 20px;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .card-icon {
        width: 56px;
        height: 56px;
        font-size: 28px;
    }
}