/* ============================================
   功能特性页专属样式 - 赛博霓虹风格
   ============================================ */

/* 功能详情区块 */
.feature-detail {
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
    padding-top: var(--space-2xl);
}

.feature-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
    padding: var(--space-3xl) 0;
    border-bottom: 1px solid var(--border-subtle);
}

.feature-block:last-child {
    border-bottom: none;
}

.feature-block:nth-child(even) .feature-content {
    order: 2;
}

.feature-block:nth-child(even) .feature-visual {
    order: 1;
}

/* 内容区 */
.feature-content {
    padding: var(--space-xl);
}

.feature-tag {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: rgba(0, 245, 255, 0.1);
    border: 1px solid var(--neon-cyan);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--neon-cyan);
    margin-bottom: var(--space-md);
    font-family: var(--font-display);
    letter-spacing: 1px;
    box-shadow: 0 0 10px var(--neon-cyan-glow);
}

.feature-tag.tag-blue {
    background: rgba(0, 122, 255, 0.1);
    border-color: #007aff;
    color: #007aff;
    box-shadow: 0 0 10px rgba(0, 122, 255, 0.3);
}

.feature-tag.tag-green {
    background: rgba(57, 255, 20, 0.1);
    border-color: var(--neon-green);
    color: var(--neon-green);
    box-shadow: 0 0 10px var(--neon-green-glow);
}

.feature-tag.tag-orange {
    background: rgba(255, 149, 0, 0.1);
    border-color: #ff9500;
    color: #ff9500;
    box-shadow: 0 0 10px rgba(255, 149, 0, 0.3);
}

.feature-content .feature-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    letter-spacing: 1px;
}

.feature-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-lg);
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.feature-list li::before {
    content: '▸';
    color: var(--neon-cyan);
    font-size: 1.2rem;
    text-shadow: 0 0 10px var(--neon-cyan-glow);
}

/* 视觉展示区 */
.feature-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
}

/* 延迟演示 */
.latency-demo {
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    text-align: center;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.latency-demo::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-green));
}

.latency-value {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 800;
    color: var(--neon-cyan);
    text-shadow: 0 0 30px var(--neon-cyan-glow);
    line-height: 1;
}

.latency-value span {
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.latency-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: var(--space-sm) 0 var(--space-lg);
    letter-spacing: 2px;
}

.latency-bar {
    width: 100%;
    height: 8px;
    background: rgba(0, 245, 255, 0.1);
    border-radius: var(--radius-full);
    overflow: hidden;
    position: relative;
}

.latency-fill {
    height: 100%;
    width: 15%;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-green));
    border-radius: var(--radius-full);
    box-shadow: 0 0 20px var(--neon-cyan-glow);
    animation: latencyPulse 2s ease-in-out infinite;
}

@keyframes latencyPulse {
    0%, 100% { width: 15%; }
    50% { width: 20%; }
}

/* 安全演示 */
.security-demo {
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    text-align: center;
    backdrop-filter: blur(10px);
    position: relative;
}

.security-demo::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--neon-pink), var(--neon-purple));
}

.lock-icon {
    font-size: 4rem;
    margin-bottom: var(--space-md);
    filter: drop-shadow(0 0 20px var(--neon-pink-glow));
    animation: lockPulse 2s ease-in-out infinite;
}

@keyframes lockPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.security-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--neon-pink);
    margin-bottom: var(--space-lg);
    text-shadow: 0 0 15px var(--neon-pink-glow);
}

.security-badges {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.security-badges span {
    padding: var(--space-xs) var(--space-md);
    background: rgba(255, 0, 255, 0.1);
    border: 1px solid var(--neon-pink);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--neon-pink);
    font-family: var(--font-display);
    letter-spacing: 1px;
}

/* AI演示 */
.ai-demo {
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    text-align: center;
    backdrop-filter: blur(10px);
    position: relative;
}

.ai-demo::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--neon-green), var(--neon-cyan));
}

.ai-brain {
    font-size: 4rem;
    margin-bottom: var(--space-md);
    filter: drop-shadow(0 0 20px var(--neon-green-glow));
    animation: brainPulse 3s ease-in-out infinite;
}

@keyframes brainPulse {
    0%, 100% { filter: drop-shadow(0 0 20px var(--neon-green-glow)); }
    50% { filter: drop-shadow(0 0 40px var(--neon-green-glow)); }
}

.ai-connections {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.ai-node {
    font-size: 1.5rem;
    opacity: 0.7;
    animation: nodeFloat 2s ease-in-out infinite;
}

.ai-node:nth-child(2) { animation-delay: 0.5s; }
.ai-node:nth-child(3) { animation-delay: 1s; }
.ai-node:nth-child(4) { animation-delay: 1.5s; }

@keyframes nodeFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

.ai-text {
    font-family: var(--font-display);
    font-size: 0.9rem;
    color: var(--neon-green);
    letter-spacing: 2px;
    text-shadow: 0 0 10px var(--neon-green-glow);
}

/* 资源演示 */
.resource-demo {
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    backdrop-filter: blur(10px);
    position: relative;
}

.resource-demo::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, #ff9500, var(--neon-pink));
}

.resource-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.resource-item:last-child {
    margin-bottom: 0;
}

.resource-label {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    width: 50px;
    letter-spacing: 1px;
}

.resource-bar {
    flex: 1;
    height: 10px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.resource-fill {
    height: 100%;
    background: linear-gradient(90deg, #ff9500, var(--neon-pink));
    border-radius: var(--radius-full);
    box-shadow: 0 0 15px rgba(255, 149, 0, 0.5);
    transition: width 1s ease;
}

.resource-value {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--neon-pink);
    width: 60px;
    text-align: right;
    text-shadow: 0 0 10px var(--neon-pink-glow);
}

/* 认证演示 */
.cert-demo {
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    text-align: center;
    backdrop-filter: blur(10px);
    position: relative;
}

.cert-demo::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
}

.cert-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: linear-gradient(135deg, rgba(0, 245, 255, 0.1), rgba(184, 41, 221, 0.1));
    border: 2px solid var(--neon-cyan);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-lg);
    box-shadow: 0 0 20px var(--neon-cyan-glow);
}

.cert-icon {
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-primary);
    font-weight: 700;
    font-size: 0.9rem;
}

.cert-text {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--neon-cyan);
    letter-spacing: 1px;
}

.cert-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.cert-item {
    padding: var(--space-sm) var(--space-md);
    background: rgba(0, 245, 255, 0.05);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.cert-item:hover {
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    box-shadow: 0 0 10px var(--neon-cyan-glow);
}

/* 技术规格区 */
.specs {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    position: relative;
}

.specs::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--neon-purple), transparent);
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.spec-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
}

.spec-card::before {
    content: '';
    display: block;
    height: 2px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
    margin: calc(-1 * var(--space-xl)) calc(-1 * var(--space-xl)) var(--space-lg);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.spec-card:hover {
    border-color: var(--border-neon);
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4), 0 0 20px var(--neon-cyan-glow);
}

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

.spec-card h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--neon-cyan);
    margin-bottom: var(--space-md);
    letter-spacing: 1px;
}

.spec-card ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.spec-card li {
    font-size: 0.9rem;
    color: var(--text-secondary);
    padding: var(--space-xs) 0;
    border-bottom: 1px solid var(--border-subtle);
}

.spec-card li:last-child {
    border-bottom: none;
}

.spec-card li strong {
    color: var(--text-primary);
    font-weight: 500;
}

/* CTA区域 */
.cta-section {
    padding: var(--space-4xl) 0;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 50%, var(--bg-secondary) 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 30% 50%, rgba(0, 245, 255, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 50%, rgba(255, 0, 255, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.cta-title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    text-shadow: 0 0 30px var(--neon-cyan-glow);
    letter-spacing: 2px;
}

.cta-desc {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

.cta-section .btn-primary {
    background: var(--text-primary);
    color: var(--bg-primary);
    box-shadow: 0 4px 30px rgba(255, 255, 255, 0.3);
}

.cta-section .btn-primary:hover {
    background: var(--neon-cyan);
    box-shadow: 0 8px 40px var(--neon-cyan-glow), 0 0 60px var(--neon-cyan-glow);
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
    .feature-block {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .feature-block:nth-child(even) .feature-content,
    .feature-block:nth-child(even) .feature-visual {
        order: unset;
    }
    
    .specs-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .feature-content .feature-title {
        font-size: 1.75rem;
    }
    
    .cta-title {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .feature-content .feature-title {
        font-size: 1.5rem;
    }
    
    .latency-value {
        font-size: 3rem;
    }
    
    .specs-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .cta-title {
        font-size: 1.75rem;
    }
}

@media (max-width: 480px) {
    .feature-content {
        padding: var(--space-md);
    }
    
    .feature-visual {
        padding: var(--space-md);
    }
    
    .feature-content .feature-title {
        font-size: 1.25rem;
    }
    
    .latency-value {
        font-size: 2.5rem;
    }
    
    .lock-icon,
    .ai-brain {
        font-size: 3rem;
    }
    
    .cta-title {
        font-size: 1.5rem;
    }
}