/* Topgamebeat - Developer Tools - Dark Theme Stylesheet */
:root {
    /* Dark Theme Colors */
    --bg-primary: #0D1117;
    --bg-secondary: #161B22;
    --bg-tertiary: #21262D;
    --bg-card: #1C2128;
    --bg-hover: #30363D;
    
    /* Accent Colors - Neon */
    --accent-green: #00FF88;
    --accent-cyan: #00D4FF;
    --accent-purple: #A855F7;
    --accent-yellow: #FBBF24;
    --accent-red: #FF6B6B;
    --accent-orange: #FF9F43;
    
    /* Primary Gradient */
    --gradient-primary: linear-gradient(135deg, #00FF88 0%, #00D4FF 100%);
    --gradient-purple: linear-gradient(135deg, #A855F7 0%, #6366F1 100%);
    --gradient-warm: linear-gradient(135deg, #FF9F43 0%, #FF6B6B 100%);
    
    /* Text Colors */
    --text-primary: #FFFFFF;
    --text-secondary: #B3BAC5;
    --text-muted: #8B949E;
    --text-code: #00FF88;
    
    /* Border & Shadow */
    --border-color: #30363D;
    --border-glow: rgba(0, 255, 136, 0.3);
    --shadow-glow: 0 0 20px rgba(0, 255, 136, 0.15);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.4);
    
    /* Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transition */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

/* Code Font */
.mono, code, pre, .terminal {
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

/* ========== HEADER ========== */
header {
    background: rgba(13, 17, 23, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    max-width: 1280px;
    margin: 0 auto;
}

.logo {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo i {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo span { color: var(--accent-green); }

.nav-menu { display: flex; list-style: none; gap: 32px; }

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-menu a:hover { color: var(--accent-green); }

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition);
}

.nav-menu a:hover::after { width: 100%; }

.mobile-menu-toggle { display: none; background: none; border: none; color: var(--text-primary); font-size: 1.5rem; cursor: pointer; }

/* ========== BUTTONS ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--bg-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--accent-green);
    color: var(--accent-green);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--accent-green);
    color: var(--accent-green);
}

.btn-outline:hover {
    background: var(--accent-green);
    color: var(--bg-primary);
}

.btn-lg { padding: 16px 32px; font-size: 1rem; }

/* ========== HERO SECTION - Terminal Style ========== */
.hero {
    position: relative;
    padding: 100px 24px 80px;
    overflow: hidden;
    background: var(--bg-primary);
}

.hero-bg {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(0, 255, 136, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(0, 212, 255, 0.06) 0%, transparent 40%),
        radial-gradient(ellipse at 50% 80%, rgba(168, 85, 247, 0.05) 0%, transparent 40%);
    pointer-events: none;
}

/* Code Rain Effect */
.code-rain {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    overflow: hidden;
    opacity: 0.15;
    pointer-events: none;
}

.code-rain span {
    position: absolute;
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    color: var(--accent-green);
    animation: rain 8s linear infinite;
    opacity: 0;
}

@keyframes rain {
    0% { transform: translateY(-100%); opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { transform: translateY(100vh); opacity: 0; }
}

.hero-content {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.hero-badge i { color: var(--accent-green); }

.hero h1 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 3.2rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.gradient-text {
    background: var(--gradient-primary);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    /* 添加备用颜色以防渐变不支持 */
    color: var(--accent-green);
    font-weight: 800;
    text-shadow: 0 0 20px rgba(0, 255, 136, 0.3);
}

.hero-desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.7;
    font-weight: 500;
}

/* Terminal Input */
.terminal-input {
    max-width: 600px;
    margin: 0 auto 50px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

.terminal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.terminal-dot.red { background: #FF5F56; }
.terminal-dot.yellow { background: #FFBD2E; }
.terminal-dot.green { background: #27CA40; }

.terminal-title {
    flex: 1;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}

.terminal-body {
    display: flex;
    align-items: center;
    padding: 16px 20px;
}

.terminal-prompt {
    color: var(--accent-green);
    font-family: 'JetBrains Mono', monospace;
    margin-right: 12px;
}

.terminal-body input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
}

.terminal-body input::placeholder { color: var(--text-muted); }

/* Hero Stats */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
}

.stat-item { text-align: center; }

.stat-num {
    display: block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-green);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ========== TOOLS SECTION ========== */
.tools-section {
    padding: 80px 24px;
    background: var(--bg-secondary);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
    gap: 20px;
}

.section-header h2 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.8rem;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    color: var(--text-primary);
}

.section-header h2 i { color: var(--accent-green); }

.tool-filters { display: flex; gap: 10px; flex-wrap: wrap; }

.filter-btn {
    padding: 10px 20px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover { border-color: var(--accent-green); color: var(--accent-green); }
.filter-btn.active { background: var(--accent-green); color: var(--bg-primary); border-color: var(--accent-green); }

/* Terminal Style Tool Cards */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.tool-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
}

.tool-card:hover {
    border-color: var(--accent-green);
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
}

/* Terminal Window Header */
.card-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

.card-dots { display: flex; gap: 6px; }

.card-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.card-dot.red { background: #FF5F56; }
.card-dot.yellow { background: #FFBD2E; }
.card-dot.green { background: #27CA40; }

.card-title {
    flex: 1;
    text-align: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Card Body */
.card-body { padding: 24px; }

.card-icon {
    width: 50px;
    height: 50px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    font-size: 1.5rem;
}

.card-body h3 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.1rem;
    margin-bottom: 8px;
    font-weight: 700;
    color: var(--text-primary);
}

.card-body p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 16px;
}

.card-tag {
    display: inline-block;
    padding: 4px 10px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--accent-cyan);
}

/* Icon Colors */
.icon-green { color: var(--accent-green); }
.icon-cyan { color: var(--accent-cyan); }
.icon-purple { color: var(--accent-purple); }
.icon-yellow { color: var(--accent-yellow); }
.icon-red { color: var(--accent-red); }
.icon-orange { color: var(--accent-orange); }

/* ========== FEATURES SECTION ========== */
.features-section {
    padding: 80px 24px;
    background: var(--bg-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.feature-card {
    padding: 30px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-4px);
}

.feature-card i {
    font-size: 2rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.1rem;
    margin-bottom: 10px;
    font-weight: 700;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ========== CTA SECTION ========== */
.cta-section {
    padding: 80px 24px;
    background: var(--bg-secondary);
    text-align: center;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-content h2 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2rem;
    margin-bottom: 16px;
    font-weight: 700;
    color: var(--text-primary);
}

.cta-content p {
    color: var(--text-secondary);
    margin-bottom: 30px;
}

/* ========== FOOTER ========== */
footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 60px 24px 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    max-width: 1280px;
    margin: 0 auto;
}

.footer-section h3 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    margin-bottom: 20px;
    color: var(--accent-green);
}

.footer-section p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.8;
}

.footer-section ul { list-style: none; }
.footer-section ul li { margin-bottom: 10px; }

.footer-section ul a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-section ul a:hover { color: var(--accent-green); }

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    margin-top: 40px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ========== PAGE CONTENT ========== */
.page-content {
    padding: 60px 24px;
    min-height: calc(100vh - 200px);
}

.page-header {
    text-align: center;
    margin-bottom: 50px;
}

.page-header h1 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.page-header h1 i { color: var(--accent-green); }
.page-header p { color: var(--text-secondary); margin-top: 12px; }

/* ========== TOOL PAGE LAYOUT ========== */
.tool-page { padding: 40px 24px; }

.tool-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.tool-panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.panel-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

.panel-dots { display: flex; gap: 6px; }
.panel-dot { width: 10px; height: 10px; border-radius: 50%; }
.panel-dot.red { background: #FF5F56; }
.panel-dot.yellow { background: #FFBD2E; }
.panel-dot.green { background: #27CA40; }

.panel-title {
    flex: 1;
    text-align: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.panel-body { padding: 24px; }

/* Form Controls */
.form-group { margin-bottom: 20px; }

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-green);
    box-shadow: 0 0 0 3px rgba(0, 255, 136, 0.1);
}

textarea.form-control {
    font-family: 'JetBrains Mono', monospace;
    resize: vertical;
    min-height: 200px;
}

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238B949E' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
}

/* Code Output */
.code-output {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    color: var(--accent-green);
    min-height: 200px;
    overflow: auto;
    white-space: pre-wrap;
    word-break: break-all;
}

/* Tool Actions */
.tool-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 20px;
}

/* Notification */
.notification {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 16px 24px;
    border-radius: var(--radius-md);
    color: var(--bg-primary);
    font-weight: 500;
    z-index: 1000;
    animation: slideIn 0.3s ease;
}

.notification.success { background: var(--accent-green); }
.notification.error { background: var(--accent-red); }
.notification.info { background: var(--accent-cyan); }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ========== CONTENT PAGES ========== */
.content-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    margin-bottom: 30px;
}

.content-section h2 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.4rem;
    margin-bottom: 20px;
    color: var(--accent-green);
}

.content-section p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.feature-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.feature-item:hover { border-color: var(--accent-green); }
.feature-item i { font-size: 1.5rem; color: var(--accent-green); margin-top: 4px; }
.feature-item h3 { font-size: 1rem; margin-bottom: 6px; }
.feature-item p { font-size: 0.9rem; color: var(--text-secondary); margin: 0; }

/* Contact Page */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-form-section, .contact-info-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.contact-form-section h2, .contact-info-section h2 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.3rem;
    margin-bottom: 24px;
    color: var(--accent-green);
}

.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 16px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
}

.contact-info-item i { font-size: 1.3rem; color: var(--accent-cyan); margin-top: 4px; }
.contact-info-item h3 { font-size: 0.95rem; margin-bottom: 4px; }
.contact-info-item p { color: var(--text-secondary); font-size: 0.9rem; margin: 0; }

/* Legal Pages */
.legal-content {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 50px;
}

.legal-content section { margin-bottom: 35px; }

.legal-content h2 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.2rem;
    color: var(--accent-green);
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.legal-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 12px;
}

.legal-content ul { list-style: none; padding: 0; margin: 16px 0; }

.legal-content ul li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 10px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.legal-content ul li::before {
    content: '>';
    position: absolute;
    left: 0;
    color: var(--accent-green);
    font-family: 'JetBrains Mono', monospace;
}

.legal-content a { color: var(--accent-cyan); text-decoration: none; }
.legal-content a:hover { text-decoration: underline; }

/* ========== BLOG PAGES ========== */
.blog-hero {
    padding: 80px 24px 60px;
    background: var(--bg-secondary);
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.blog-hero h1 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.blog-hero p { color: var(--text-secondary); font-size: 1.1rem; }

.blog-main { padding: 60px 24px; }

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
    margin-bottom: 50px;
}

.blog-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
}

.blog-card:hover {
    border-color: var(--accent-green);
    transform: translateY(-4px);
}

.blog-card-image {
    height: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.blog-card-image i { font-size: 2.5rem; color: white; opacity: 0.9; }

.blog-card-content { padding: 24px; }

.blog-tag {
    display: inline-block;
    padding: 4px 10px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--accent-cyan);
    margin-bottom: 12px;
}

.blog-card-content h3 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.1rem;
    margin-bottom: 10px;
    line-height: 1.4;
}

.blog-card-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 16px;
}

.blog-meta {
    display: flex;
    gap: 16px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.blog-meta span { display: flex; align-items: center; gap: 6px; }

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--accent-green);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    margin-top: 16px;
    transition: var(--transition);
}

.read-more:hover { gap: 10px; }

/* Article Page */
.article-hero {
    padding: 100px 24px 60px;
    text-align: center;
    color: white;
}

.article-hero h1 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2.2rem;
    margin: 16px 0 24px;
    line-height: 1.3;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    font-size: 0.9rem;
    margin-bottom: 20px;
    transition: var(--transition);
}

.back-link:hover { color: white; }

.article-content { padding: 60px 24px; }

.article-content .container {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 40px;
    max-width: 1100px;
}

.article-body {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.article-body .lead {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}

.article-body h2 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.4rem;
    margin: 35px 0 16px;
    color: var(--accent-green);
}

.article-body h3 { font-size: 1.1rem; margin: 25px 0 12px; }

.article-body p { color: var(--text-secondary); line-height: 1.8; margin-bottom: 16px; }

.article-body ul { margin: 16px 0; padding-left: 0; list-style: none; }

.article-body ul li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 10px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.article-body ul li::before {
    content: '>';
    position: absolute;
    left: 0;
    color: var(--accent-green);
    font-family: 'JetBrains Mono', monospace;
}

.info-box {
    background: var(--bg-tertiary);
    border-left: 4px solid var(--accent-cyan);
    padding: 20px;
    border-radius: var(--radius-md);
    margin: 24px 0;
}

.info-box h4 { color: var(--accent-cyan); margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
.info-box p { margin: 0; color: var(--text-secondary); }

.cta-box {
    background: var(--gradient-primary);
    padding: 30px;
    border-radius: var(--radius-lg);
    text-align: center;
    margin: 30px 0;
}

.cta-box h3 { color: var(--bg-primary); margin-bottom: 10px; }
.cta-box p { color: var(--bg-primary); opacity: 0.9; margin-bottom: 20px; }
.cta-box .btn { background: var(--bg-primary); color: var(--accent-green); }

/* Sidebar */
.article-sidebar { display: flex; flex-direction: column; gap: 20px; }

.sidebar-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.sidebar-card h3 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    margin-bottom: 16px;
    color: var(--accent-green);
}

.related-tools, .related-articles { list-style: none; padding: 0; margin: 0; }
.related-tools li, .related-articles li { margin-bottom: 12px; }

.related-tools a, .related-articles a {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.related-tools a:hover, .related-articles a:hover { color: var(--accent-green); }
.related-tools i { color: var(--accent-cyan); width: 18px; }

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
    .tools-grid { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
    .footer-content { grid-template-columns: 1fr 1fr; gap: 30px; }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: 20px;
        gap: 16px;
        border-top: 1px solid var(--border-color);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    }
    .nav-menu.active {
        display: flex;
        height: 100vh;
    }
    .mobile-menu-toggle { display: block; }
    .header-content { position: relative; }

    .hero h1 { 
        font-size: 2.4rem; 
        font-weight: 800;
    }
    .hero-stats { gap: 30px; }
    .stat-num { font-size: 1.5rem; }

    .terminal-input { margin: 0 auto 40px; }

    .tools-grid { grid-template-columns: 1fr; }
    .tool-container { grid-template-columns: 1fr; }

    .contact-grid { grid-template-columns: 1fr; }
    .contact-form-section, .contact-info-section { padding: 30px; }

    .legal-content { padding: 30px; }

    .blog-grid { grid-template-columns: 1fr; }

    .article-hero h1 { font-size: 1.8rem; }
    .article-content .container { grid-template-columns: 1fr; }
    .article-sidebar { order: -1; }
    .article-body { padding: 30px; }

    .footer-content { grid-template-columns: 1fr; text-align: center; }
    
    .section-header h2 {
        font-size: 1.6rem;
        font-weight: 800;
    }
    
    .card-body h3 {
        font-size: 1.2rem;
        font-weight: 800;
    }
}

@media (max-width: 480px) {
    .hero { padding: 60px 16px 50px; }
    .hero h1 { 
        font-size: 2rem; 
        font-weight: 800;
        text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
    }
    .hero-desc { 
        font-size: 1.1rem; 
        font-weight: 600;
    }

    .section-header { flex-direction: column; align-items: flex-start; }
    .section-header h2 {
        font-size: 1.4rem;
        font-weight: 800;
    }
    .tool-filters { width: 100%; overflow-x: auto; flex-wrap: nowrap; padding-bottom: 10px; }

    .content-section { padding: 24px; }
    .feature-list { grid-template-columns: 1fr; }
    
    .card-body h3 {
        font-size: 1.1rem;
        font-weight: 800;
    }
    
    .feature-card h3 {
        font-size: 1rem;
        font-weight: 800;
    }
}

/* 提高标题可读性的额外样式 */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 700;
}

/* 确保所有主要标题都有足够的对比度 */
.hero h1,
.section-header h2,
.card-body h3,
.feature-card h3,
.cta-content h2 {
    color: var(--text-primary) !important;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 为渐变文字添加更好的备用方案 */
@supports not (-webkit-background-clip: text) {
    .gradient-text {
        color: var(--accent-green) !important;
        font-weight: 800;
    }
}

/* 提高小文本的可读性 */
.card-tag,
.knowledge-badge,
.tag {
    font-weight: 600;
    letter-spacing: 0.025em;
}

/* Utility Classes */
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.text-center { text-align: center; }
.text-green { color: var(--accent-green); }
.text-cyan { color: var(--accent-cyan); }
.text-muted { color: var(--text-muted); }

/* Developer Knowledge Base Styles */
.dev-knowledge {
    padding: 100px 0;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: white;
}

.knowledge-categories {
    margin-top: 48px;
}

.category-nav {
    display: flex;
    gap: 8px;
    margin-bottom: 32px;
    overflow-x: auto;
    padding-bottom: 8px;
}

.category-btn {
    background: rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.7);
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
    flex-shrink: 0;
}

.category-btn:hover,
.category-btn.active {
    background: #3b82f6;
    color: white;
    transform: translateY(-2px);
}

.knowledge-section {
    display: none;
}

.knowledge-section.active {
    display: block;
}

.knowledge-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

.knowledge-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 16px;
    padding: 24px;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.knowledge-card:hover {
    transform: translateY(-8px);
    border-color: #3b82f6;
    box-shadow: 0 20px 40px rgba(59, 130, 246, 0.2);
}

.knowledge-card.featured {
    grid-column: span 2;
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    border-color: transparent;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.card-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: rgba(59, 130, 246, 0.2);
    color: #3b82f6;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.knowledge-card.featured .card-icon {
    background: rgba(255,255,255,0.2);
    color: white;
}

.knowledge-badge {
    background: #3b82f6;
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.knowledge-badge.essential {
    background: #f59e0b;
}

.knowledge-badge.hot {
    background: #ef4444;
}

.knowledge-badge.security {
    background: #10b981;
}

.knowledge-badge.performance {
    background: #8b5cf6;
}

.knowledge-badge.critical {
    background: #dc2626;
}

.knowledge-card.featured .knowledge-badge {
    background: rgba(255,255,255,0.2);
}

.knowledge-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: white;
}

.knowledge-card p {
    color: rgba(255,255,255,0.8);
    line-height: 1.6;
    margin-bottom: 20px;
}

.code-preview {
    background: rgba(0,0,0,0.3);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 20px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    overflow-x: auto;
}

.code-preview code {
    color: #a3a3a3;
    white-space: pre;
}

.knowledge-points {
    margin-bottom: 20px;
}

.point {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    color: rgba(255,255,255,0.8);
    font-size: 14px;
}

.point i {
    color: #10b981;
    font-size: 12px;
}

.regex-examples {
    margin-bottom: 20px;
}

.regex-item {
    background: rgba(0,0,0,0.3);
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 8px;
}

.regex-item code {
    display: block;
    font-family: 'JetBrains Mono', monospace;
    color: #fbbf24;
    margin-bottom: 4px;
}

.regex-item span {
    color: rgba(255,255,255,0.6);
    font-size: 12px;
}

.performance-metrics {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
}

.metric {
    text-align: center;
    background: rgba(0,0,0,0.3);
    border-radius: 8px;
    padding: 12px;
    flex: 1;
}

.metric-value {
    display: block;
    font-size: 18px;
    font-weight: 700;
    color: #10b981;
}

.metric-label {
    font-size: 12px;
    color: rgba(255,255,255,0.6);
}

.auth-flow {
    background: rgba(0,0,0,0.3);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 20px;
    text-align: center;
}

.flow-step {
    font-family: 'JetBrains Mono', monospace;
    color: #3b82f6;
    font-size: 14px;
}

.knowledge-links {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.tool-link {
    background: rgba(255,255,255,0.1);
    color: white;
    padding: 8px 16px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.tool-link:hover {
    background: rgba(255,255,255,0.2);
    transform: translateY(-2px);
}

.read-time {
    display: flex;
    align-items: center;
    gap: 4px;
    color: rgba(255,255,255,0.6);
    font-size: 12px;
}

/* Code Snippets Library Styles */
.code-snippets {
    padding: 80px 0;
    background: #33404e;
}

.snippets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 24px;
    margin-top: 48px;
}

.snippet-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.snippet-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.15);
}

.snippet-header {
    padding: 20px 24px 16px;
    border-bottom: 1px solid #e2e8f0;
}

.snippet-header h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
    color: #000;
}

.snippet-tags {
    display: flex;
    gap: 8px;
}

.tag {
    background: #e2e8f0;
    color: #64748b;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.tag.js {
    background: #fef3c7;
    color: #d97706;
}

.snippet-code {
    background: #1e293b;
    padding: 20px 24px;
    overflow-x: auto;
}

.snippet-code pre {
    margin: 0;
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    line-height: 1.5;
}

.snippet-code code {
    color: #e2e8f0;
}

.snippet-actions {
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #f8fafc;
}

.copy-btn {
    background: #3b82f6;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.copy-btn:hover {
    background: #2563eb;
    transform: translateY(-2px);
}

.usage-count {
    display: flex;
    align-items: center;
    gap: 4px;
    color: #64748b;
    font-size: 12px;
}

.usage-count i {
    color: #ef4444;
}

.snippets-cta {
    text-align: center;
    margin-top: 48px;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .dev-knowledge {
        padding: 60px 0;
    }
    
    .knowledge-cards {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .knowledge-card.featured {
        grid-column: span 1;
    }
    
    .knowledge-card {
        padding: 20px;
    }
    
    .category-nav {
        gap: 4px;
    }
    
    .category-btn {
        padding: 10px 16px;
        font-size: 14px;
    }
    
    .code-snippets {
        padding: 60px 0;
    }
    
    .snippets-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-top: 32px;
    }
    
    .snippet-code {
        padding: 16px 20px;
    }
    
    .snippet-code pre {
        font-size: 12px;
    }
}

@media (max-width: 480px) {
    .knowledge-card {
        padding: 16px;
    }
    
    .card-icon {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    
    .knowledge-card h3 {
        font-size: 18px;
    }
    
    .code-preview {
        padding: 12px;
        font-size: 12px;
    }
    
    .snippet-header {
        padding: 16px 20px 12px;
    }
    
    .snippet-actions {
        padding: 12px 20px;
        flex-direction: column;
        gap: 8px;
        align-items: stretch;
    }
    
    .copy-btn {
        justify-content: center;
    }
}