/* ============================================
   国内大模型导航 - 样式表
   设计风格: 亮色、简约高级
   主色调: 白色 + 淡绿色辅色
   ============================================ */

/* CSS Variables */
:root {
    /* 主色调 */
    --color-primary: #ffffff;
    --color-secondary: #f8faf8;
    --color-accent: #4ade80;
    --color-accent-light: #dcfce7;
    --color-accent-dark: #22c55e;

    /* 文字颜色 */
    --color-text-primary: #1a1a2e;
    --color-text-secondary: #6b7280;
    --color-text-muted: #9ca3af;

    /* 边框和阴影 */
    --color-border: #e5e7eb;
    --color-border-light: #f3f4f6;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.02);

    /* 间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 1.5rem;
    --spacing-2xl: 3rem;

    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    /* 过渡 */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #f8faf8 0%, #f0fdf4 50%, #ecfdf5 100%);
    color: var(--color-text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
}

/* ============================================
   Header
   ============================================ */
.header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    /*padding: var(--spacing-2xl) 0;*/
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
    color: white;
    letter-spacing: -0.02em;
}

.logo h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-text-primary) 0%, #374151 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    font-weight: 400;
    letter-spacing: 0.02em;
}

/* ============================================
   Models Grid
   ============================================ */
.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

/* ============================================
   Model Card
   ============================================ */
.model-card {
    background: var(--color-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    border: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.model-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.model-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-accent-light);
}

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

/* Card Header */
.card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.model-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.4rem;
    font-weight: 700;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: white;
    letter-spacing: -0.02em;
}

.model-info h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
}

.model-tag {
    display: inline-block;
    padding: 2px 10px;
    background: var(--color-accent-light);
    color: var(--color-accent-dark);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 20px;
    letter-spacing: 0.02em;
}

/* Card Links */
.card-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
}

.link-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-secondary);
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--color-text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.link-item:hover {
    background: var(--color-accent-light);
    border-color: var(--color-accent);
    color: var(--color-accent-dark);
    transform: translateX(2px);
}

.link-icon {
    font-size: 1rem;
    flex-shrink: 0;
}

/* ============================================
   Logo Colors (per brand)
   ============================================ */
.model-logo.aliyun {
    background: linear-gradient(135deg, #ff6a00 0%, #ff8c38 100%);
}

.model-logo.zhipu {
    background: linear-gradient(135deg, #2b5ce6 0%, #4f7bff 100%);
}

.model-logo.deepseek {
    background: linear-gradient(135deg, #4d6bfe 0%, #6b8aff 100%);
}

.model-logo.kimi {
    background: linear-gradient(135deg, #000000 0%, #333333 100%);
}

.model-logo.minimax {
    background: linear-gradient(135deg, #fe604a 0%, #ed8678 100%);
}

.model-logo.xiaomi {
    background: linear-gradient(135deg, #ff6900 0%, #ff8f3f 100%);
}

.model-logo.doubao {
    background: linear-gradient(135deg, #3b82f6 0%, #60a5fa 100%);
}

.model-logo.baidu {
    background: linear-gradient(135deg, #2932e1 0%, #5b6bff 100%);
}

.model-logo.xunfei {
    background: linear-gradient(135deg, #ed6c00 0%, #ff9800 100%);
}

.model-logo.tencent {
    background: linear-gradient(135deg, #0052d9 0%, #4377ef 100%);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    text-align: center;
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--color-border-light);
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.footer p {
    margin-bottom: var(--spacing-xs);
}

.update-time {
    color: var(--color-text-muted);
    font-size: 0.8rem;
}

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

.model-card {
    animation: fadeInUp 0.5s ease-out forwards;
    opacity: 0;
}

.model-card:nth-child(1) { animation-delay: 0.05s; }
.model-card:nth-child(2) { animation-delay: 0.1s; }
.model-card:nth-child(3) { animation-delay: 0.15s; }
.model-card:nth-child(4) { animation-delay: 0.2s; }
.model-card:nth-child(5) { animation-delay: 0.25s; }
.model-card:nth-child(6) { animation-delay: 0.3s; }
.model-card:nth-child(7) { animation-delay: 0.35s; }
.model-card:nth-child(8) { animation-delay: 0.4s; }
.model-card:nth-child(9) { animation-delay: 0.45s; }
.model-card:nth-child(10) { animation-delay: 0.5s; }

/* Hidden state for search filtering */
.model-card.hidden {
    display: none;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .logo h1 {
        font-size: 1.8rem;
    }

    .subtitle {
        font-size: 0.95rem;
    }

    .models-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .model-card {
        padding: var(--spacing-lg);
    }

    .card-links {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .logo {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .logo h1 {
        font-size: 1.5rem;
    }
}

/* ============================================
   Scrollbar
   ============================================ */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

/* ============================================
   Selection
   ============================================ */
::selection {
    background: var(--color-accent-light);
    color: var(--color-accent-dark);
}