/* 暗黑科技风 (Dark Tech / Cyber) 基础设置 */
:root {
    --bg-main: #090a0f;
    --bg-card: #14151a;
    --bg-card-hover: #1c1e26;
    --text-primary: #f0f0f5;
    --text-secondary: #8c8f9e;
    --accent: #00ffcc;
    --accent-hover: #00e6b8;
    --accent-gradient: linear-gradient(135deg, #00ffcc 0%, #0088ff 100%);
    --glow: 0 0 20px rgba(0, 255, 204, 0.2);
    --border-color: #2a2b36;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* 玻璃拟态导航栏 */
.glass-header {
    position: sticky;
    top: 0;
    z-index: 999;
    background: rgba(9, 10, 15, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.nav-menu {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s;
}

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

/* 容器与通用排版 */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 5rem 5%;
}

.section-title {
    text-align: center;
    margin-bottom: 3.5rem;
}

.section-title h3 {
    font-size: 2.2rem;
    margin-bottom: 0.5rem;
}

.section-title p {
    color: var(--text-secondary);
}

.bg-darker {
    background-color: #050608;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

/* 按钮通用 */
.btn-primary {
    display: inline-block;
    background: var(--accent-gradient);
    color: #000;
    padding: 0.8rem 2.2rem;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    border: none;
    transition: all 0.3s ease;
    box-shadow: var(--glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0, 255, 204, 0.4);
}

.btn-secondary, .btn-outline {
    display: inline-block;
    padding: 0.8rem 2.2rem;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 500;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    transition: all 0.3s ease;
}

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

/* 主视觉区 Hero */
.hero-section {
    padding: 6rem 5% 4rem;
    position: relative;
    overflow: hidden;
}

/* 已移除可能产生边界割裂感的背景极光特效，保持极简纯净暗黑背景 */

.hero-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: rgba(0, 255, 204, 0.1);
    color: var(--accent);
    border-radius: 20px;
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(0, 255, 204, 0.3);
}

.hero-text h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

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

.hero-text h2 {
    font-size: 1.2rem;
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.cyber-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 12px;
    position: relative;
    overflow: hidden;
    animation: float-horizontal 4s ease-in-out infinite;
}

.cyber-card.delay-1 {
    animation-delay: 2s;
    margin-left: 2rem;
}

.cyber-line {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 4px;
    background: var(--accent);
}

.cyber-card h3 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.cyber-card .ping {
    font-size: 2rem;
    font-weight: bold;
}

.cyber-card .ping span {
    color: var(--accent);
}

.cyber-card .ai-status {
    font-size: 1.5rem;
    font-weight: bold;
    color: #0088ff;
}

.cyber-card .status {
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: #4caf50;
}

@keyframes float-horizontal {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(10px); }
}

/* 核心优势 */
.feature-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.feature-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 2.5rem 2rem;
    border-radius: 16px;
    transition: all 0.3s;
}

.feature-box:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent);
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.feature-box h4 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.feature-box p {
    color: var(--text-secondary);
}

/* 价格套餐 */
.pricing-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.price-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 3rem 2rem;
    border-radius: 16px;
    text-align: center;
    position: relative;
}

.premium-box {
    border-color: var(--accent);
    box-shadow: var(--glow);
    transform: scale(1.02);
}

.popular-tag {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-gradient);
    color: #000;
    padding: 0.3rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: bold;
}

.price-box h4 {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.price {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 2rem;
}

.price span {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: normal;
}

.price-features {
    list-style: none;
    text-align: left;
    margin-bottom: 2.5rem;
}

.price-features li {
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.price-features li:last-child {
    border-bottom: none;
}

/* 文章列表排版 (行式排版) */
.article-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.article-row {
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s;
}

.article-row:hover {
    border-color: var(--accent);
    background: var(--bg-card-hover);
}

.article-meta {
    color: var(--accent);
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
}

.article-content h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.article-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.article-arrow {
    display: none; /* 移动端隐藏，桌面端显示 */
    font-size: 1.5rem;
    color: var(--text-secondary);
    align-self: center;
}

.article-row:hover .article-arrow {
    color: var(--accent);
}

/* FAQ */
.faq-accordion {
    max-width: 800px;
    margin: 0 auto;
}

.faq-block {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1rem;
}

.faq-block h4 {
    color: var(--accent);
    margin-bottom: 0.8rem;
}

.faq-block p {
    color: var(--text-secondary);
}

/* 底部与外链 */
.cyber-footer {
    background: #050608;
    border-top: 1px solid var(--border-color);
    padding: 4rem 5% 2rem;
}

.footer-grid {
    max-width: 1200px;
    margin: 0 auto 3rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 1rem;
}

.footer-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-nav a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
    text-align: center;
}

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

.pbn-links a {
    color: var(--accent);
    text-decoration: none;
    margin: 0 0.5rem;
}

.copyright {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* 响应式桌面端 */
@media (min-width: 768px) {
    .nav-menu {
        display: flex;
    }
    
    .hero-grid {
        flex-direction: row;
        align-items: center;
    }
    
    .hero-text {
        flex: 1.2;
    }
    
    .hero-visual {
        flex: 0.8;
    }
    
    .feature-layout {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .pricing-cards {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .article-row {
        flex-direction: row;
        align-items: center;
        gap: 2rem;
    }
    
    .article-meta {
        margin-bottom: 0;
        flex: 0 0 100px;
    }
    
    .article-content {
        flex: 1;
    }
    
    .article-arrow {
        display: block;
    }
    
    .footer-grid {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
    
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}