/**
 * CYBERLOG Design System v1.0
 * 统一的 CSS 变量、基础样式和公共组件
 * 所有页面共享此文件，确保视觉一致性
 */

/* ==================== CSS 变量 ==================== */
:root {
    /* 主色调 */
    --primary: #00ff9d;
    --primary-dim: rgba(0, 255, 157, 0.08);
    --primary-border: rgba(0, 255, 157, 0.15);
    --primary-glow: rgba(0, 255, 157, 0.3);

    /* 辅助色 */
    --accent: #00f0ff;
    --accent-dim: rgba(0, 240, 255, 0.08);
    --secondary: #ff00aa;
    --secondary-dim: rgba(255, 0, 170, 0.08);
    --yellow: #f0ff00;
    --red: #ff3366;

    /* 背景色 */
    --bg: transparent;
    --bg-dark: transparent;
    --bg-card: rgba(255, 255, 255, 0.05);
    --bg-card-hover: rgba(255, 255, 255, 0.08);
    --bg-overlay: rgba(10, 10, 15, 0.85);

    /* 文字色 */
    --text: #e0e0e0;
    --text-primary: #e0e0e0;
    --text-dim: rgba(255, 255, 255, 0.55);
    --text-muted: rgba(255, 255, 255, 0.35);

    /* 边框 */
    --border: rgba(255, 255, 255, 0.08);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-primary: rgba(0, 255, 157, 0.2);

    /* 发光效果 */
    --glow: 0 0 20px rgba(0, 255, 157, 0.2);
    --glow-strong: 0 0 40px rgba(0, 255, 157, 0.4);

    /* 字体 */
    --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;
    --font-display: 'Orbitron', 'Arial Black', sans-serif;
    --font-body: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;

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

    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* 过渡 */
    --transition: all 0.2s ease;
    --transition-slow: all 0.4s ease;
}

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

html {
    scroll-behavior: smooth;
    background: #0a0a0f;
}

body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* ==================== 扫描线背景效果 ==================== */
.scanlines::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 255, 157, 0.008) 2px,
        rgba(0, 255, 157, 0.008) 4px
    );
    pointer-events: none;
    z-index: 9999;
}

/* 网格背景 */
.grid-bg {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 255, 157, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 157, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
    z-index: 0;
}

/* ==================== 导航栏 ==================== */
.cyber-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-primary);
    padding: 0 var(--space-xl);
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.cyber-nav .logo {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 900;
    color: var(--primary);
    text-decoration: none;
    letter-spacing: 2px;
    text-shadow: 0 0 20px var(--primary-glow);
    transition: var(--transition);
}

.cyber-nav .logo:hover {
    text-shadow: 0 0 30px rgba(0, 255, 157, 0.6);
}

.cyber-nav .nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    list-style: none;
}

.cyber-nav .nav-links a {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-dim);
    text-decoration: none;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: var(--transition);
    position: relative;
}

.cyber-nav .nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--primary);
    transition: width 0.2s ease;
}

.cyber-nav .nav-links a:hover,
.cyber-nav .nav-links a.active {
    color: var(--primary);
}

.cyber-nav .nav-links a:hover::after,
.cyber-nav .nav-links a.active::after {
    width: 100%;
}

/* ==================== 按钮 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.6rem 1.4rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 1px;
    text-decoration: none;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary);
    color: #000;
    border-color: var(--primary);
}

.btn-primary:hover {
    background: transparent;
    color: var(--primary);
    box-shadow: var(--glow);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border-color: var(--border-primary);
}

.btn-outline:hover {
    background: var(--primary-dim);
    border-color: var(--primary);
    box-shadow: var(--glow);
}

.btn-ghost {
    background: transparent;
    color: var(--text-dim);
    border-color: var(--border);
}

.btn-ghost:hover {
    color: var(--text);
    border-color: var(--border-primary);
}

/* ==================== 标签/徽章 ==================== */
.tag {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.6rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    border-radius: var(--radius-sm);
    background: var(--primary-dim);
    color: var(--primary);
    border: 1px solid var(--primary-border);
    text-decoration: none;
    transition: var(--transition);
}

.tag:hover {
    background: rgba(0, 255, 157, 0.15);
    border-color: var(--primary);
}

.tag-accent {
    background: var(--accent-dim);
    color: var(--accent);
    border-color: rgba(0, 240, 255, 0.2);
}

/* ==================== 卡片 ==================== */
.cyber-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.cyber-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-border), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.cyber-card:hover {
    border-color: var(--border-primary);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 0 1px var(--primary-border);
}

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

/* ==================== 章节标题 ==================== */
.section-header {
    margin-bottom: var(--space-2xl);
}

.section-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--primary);
    letter-spacing: 3px;
    text-transform: uppercase;
    display: block;
    margin-bottom: var(--space-sm);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--text);
    letter-spacing: 2px;
}

/* ==================== 页脚 ==================== */
.cyber-footer {
    padding: 56px var(--space-xl) 28px;
    border-top: 1px solid var(--border-primary);
    background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.5) 100%);
}

.cyber-footer .footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.cyber-footer .footer-main {
    display: grid;
    grid-template-columns: 1.2fr repeat(2, 1fr);
    gap: 48px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--border);
}

.cyber-footer .footer-brand .logo {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    letter-spacing: 2px;
    display: block;
    margin-bottom: var(--space-md);
}

.cyber-footer .footer-brand p {
    color: var(--text-dim);
    font-size: 0.875rem;
    line-height: 1.65;
    max-width: 280px;
}

.cyber-footer .footer-col h4 {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    font-weight: 500;
    color: rgba(0, 255, 157, 0.85);
    letter-spacing: 2.5px;
    text-transform: uppercase;
    margin-bottom: 18px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--primary-border);
}

.cyber-footer .footer-col ul {
    list-style: none;
}

.cyber-footer .footer-col li {
    margin-bottom: 12px;
}

.cyber-footer .footer-col a {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.875rem;
    transition: var(--transition);
    display: inline-block;
}

.cyber-footer .footer-col a:hover {
    color: var(--primary);
    padding-left: 4px;
}

.cyber-footer .footer-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 28px;
}

.cyber-footer .footer-copyright {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

.cyber-footer .footer-social a {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.8rem;
    margin-left: 20px;
    transition: var(--transition);
}

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

/* ==================== 加载动画 ==================== */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.fade-in {
    animation: fadeIn 0.4s ease forwards;
}

/* ==================== 滚动条 ==================== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 255, 157, 0.03);
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 255, 157, 0.2);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 255, 157, 0.4);
}

/* ==================== 工具类 ==================== */
.text-primary { color: var(--primary); }
.text-accent { color: var(--accent); }
.text-dim { color: var(--text-dim); }
.text-mono { font-family: var(--font-mono); }
.text-display { font-family: var(--font-display); }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.section {
    padding: var(--space-2xl) var(--space-xl);
    max-width: 1200px;
    margin: 0 auto;
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
    .cyber-nav {
        padding: 0 var(--space-md);
    }

    .cyber-footer .footer-main {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .section {
        padding: var(--space-xl) var(--space-md);
    }
}