/* ========================================
   导航网站 - 优雅极简风格
   ======================================== */

/* CSS 变量 */
:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --bg-tertiary: #1a1a1a;
    --text-primary: #f5f5f5;
    --text-secondary: #999;
    --text-muted: #666;
    --accent: #c9a962;
    --accent-light: #e5d4a1;
    --border: #2a2a2a;
    --card-hover: #1f1f1f;
    --shadow: rgba(0, 0, 0, 0.5);
    --transition: cubic-bezier(0.4, 0, 0.2, 1);
}

/* 重置 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* 背景效果 */
.noise {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

.grid-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    background-image: 
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.08;
}

/* 头部 */
.header {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    background: linear-gradient(180deg, var(--bg-primary) 0%, transparent 100%);
    backdrop-filter: blur(10px);
}

.header-left {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.time-display {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
}

.time {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    font-weight: 500;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.date {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
}

.greeting {
    font-family: 'Playfair Display', serif;
    font-size: 0.875rem;
    font-style: italic;
    color: var(--accent);
    opacity: 0.7;
}

.header-center {
    flex: 1;
    max-width: 480px;
    margin: 0 2rem;
}

.header-right {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* 搜索框 */
.search-container {
    position: relative;
    width: 100%;
}

#searchInput {
    width: 100%;
    padding: 0.75rem 2.5rem 0.75rem 1.25rem;
    font-family: 'Inter', sans-serif;
    font-size: 0.9375rem;
    font-weight: 400;
    color: var(--text-primary);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    outline: none;
    transition: all 0.3s var(--transition);
}

#searchInput::placeholder {
    color: var(--text-muted);
}

#searchInput:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(201, 169, 98, 0.1);
    background: var(--bg-tertiary);
}

.search-icon {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

/* 主内容区 */
.main-content {
    position: relative;
    z-index: 10;
    padding: 1.5rem 2rem 8rem;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 1600px;
    margin: 0 auto;
}

/* 分类区块 */
.category {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.5s var(--transition) forwards;
}

.category:nth-child(1) { animation-delay: 0.05s; }
.category:nth-child(2) { animation-delay: 0.1s; }
.category:nth-child(3) { animation-delay: 0.15s; }
.category:nth-child(4) { animation-delay: 0.2s; }
.category:nth-child(5) { animation-delay: 0.25s; }
.category:nth-child(6) { animation-delay: 0.3s; }
.category:nth-child(7) { animation-delay: 0.35s; }
.category:nth-child(8) { animation-delay: 0.4s; }

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

.category-title {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.category-title .number {
    font-family: 'Playfair Display', serif;
    font-size: 0.8125rem;
    color: var(--accent);
    font-style: italic;
}

.category-title .text {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

/* 链接网格 */
.links-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
}

.link-card {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.25s var(--transition);
    position: relative;
    overflow: hidden;
}

.link-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.03), transparent);
    transition: left 0.4s var(--transition);
}

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

.link-card:hover {
    background: var(--card-hover);
    border-color: var(--accent);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--shadow);
}

.link-card.dimmed {
    opacity: 0.15;
    transform: scale(0.98);
}

.link-card.highlighted {
    opacity: 1;
    border-color: var(--accent);
    background: var(--bg-tertiary);
}

.link-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
    filter: grayscale(20%);
    transition: filter 0.25s var(--transition);
}

.link-card:hover .link-icon {
    filter: grayscale(0%);
}

.link-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.link-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.link-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 页脚 */
.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1rem 2rem;
    background: linear-gradient(0deg, var(--bg-primary) 0%, transparent 100%);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1600px;
    margin: 0 auto;
}

.shortcuts {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.shortcuts .label {
    color: var(--text-muted);
}

.shortcuts kbd {
    padding: 0.2rem 0.5rem;
    font-family: 'Inter', sans-serif;
    font-size: 0.6875rem;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 4px;
}

.beian {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.beian a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s var(--transition);
}

.beian a:hover {
    color: var(--accent);
}

/* 响应式 */
@media (max-width: 1200px) {
    .main-content {
        grid-template-columns: 1fr;
    }
    
    .links-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .header {
        flex-wrap: wrap;
        gap: 0.75rem;
        padding: 1rem;
    }
    
    .header-center {
        order: 3;
        margin: 0;
        max-width: 100%;
        width: 100%;
    }
    
    .main-content {
        padding: 1rem 1rem 8rem;
    }
    
    .links-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .greeting {
        display: none;
    }
    
    .footer {
        padding: 0.75rem 1rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 0.5rem;
    }
}

@media (max-width: 480px) {
    .links-grid {
        grid-template-columns: 1fr;
    }
}

/* 打印样式 */
@media print {
    .noise, .grid-overlay, .header, .footer {
        display: none;
    }
    
    .main-content {
        padding: 0;
        display: block;
    }
    
    .category {
        page-break-inside: avoid;
        margin-bottom: 1.5rem;
    }
}