/* 基础重置与变量 */
:root {
    --bg-color: #0d0d12; /* Terminal Geek Dark */
    --text-color: #f1f1f5;
    --text-muted: #8b8b9a;
    --brand-color: #00F6FF;
    --brand-secondary: #FF007A;
    --glass-bg: rgba(20, 20, 28, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --terminal-green: #4ade80;
    --terminal-font: 'Fira Code', monospace;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, .price {
    font-family: 'Outfit', sans-serif;
}

/* Geek/Terminal Grid Background */
.grid-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    background-position: center center;
}

/* Background glow */
.grid-bg::after {
    content: '';
    position: absolute;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 80vw;
    height: 80vh;
    background: radial-gradient(ellipse at center, rgba(0, 246, 255, 0.1) 0%, transparent 60%);
    pointer-events: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 头部导航 */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
    border-bottom: 1px solid var(--glass-border);
}

.logo {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--brand-color);
    font-family: var(--terminal-font);
    letter-spacing: -1px;
}

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-menu a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.3s;
}

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

.header-actions {
    display: flex;
    gap: 12px;
}

/* 文本渐变工具类 */
.text-gradient {
    background: linear-gradient(135deg, var(--brand-color), var(--brand-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 40px;
    letter-spacing: -1px;
}

.section-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 40px;
}

/* 玻璃拟物态卡片 */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    padding: 14px 24px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    transition: all 0.2s;
    cursor: pointer;
    font-size: 1.05rem;
    border: none;
    font-family: 'Inter', sans-serif;
}

.btn-primary {
    background: var(--brand-color);
    color: #000;
    box-shadow: 0 0 15px rgba(0, 246, 255, 0.4);
}

.btn-primary:hover {
    box-shadow: 0 0 25px rgba(0, 246, 255, 0.6);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--text-color);
    border: 1px solid var(--glass-border);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* SEO Link Special Style */
.seo-link {
    font-family: var(--terminal-font);
    font-size: 0.95rem;
    letter-spacing: -0.5px;
    color: var(--brand-color);
    border-color: rgba(0, 246, 255, 0.3);
}

.seo-link::before {
    content: '>';
    margin-right: 6px;
    color: var(--brand-secondary);
}

.seo-link:hover {
    background: rgba(0, 246, 255, 0.05);
    border-color: var(--brand-color);
    color: #fff;
}

.cta-small {
    padding: 8px 16px;
    background: var(--brand-color);
    color: #000;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 700;
    font-size: 0.9rem;
    transition: all 0.3s;
}

.cta-small:hover {
    box-shadow: 0 0 10px rgba(0,246,255,0.5);
}

.cta-small.outline {
    background: transparent;
    color: var(--text-color);
    border: 1px solid var(--glass-border);
}

.cta-small.outline:hover {
    background: rgba(255,255,255,0.1);
    box-shadow: none;
}

/* Hero Split Section */
.hero-split {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 60px;
    align-items: center;
    padding: 80px 0 100px;
}

.hero-text h1 {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -2px;
}

.hero-text p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 90%;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Dynamic Terminal Visual */
.terminal-card {
    background: #09090b;
    border: 1px solid #27272a;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.05);
}

.terminal-header {
    background: #18181b;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid #27272a;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-right: 8px;
}
.dot.red { background: #ef4444; }
.dot.yellow { background: #eab308; }
.dot.green { background: #22c55e; }

.terminal-title {
    margin-left: 12px;
    color: #a1a1aa;
    font-family: var(--terminal-font);
    font-size: 0.85rem;
}

.terminal-body {
    padding: 24px;
    font-family: var(--terminal-font);
    font-size: 0.9rem;
    color: #d4d4d8;
    min-height: 250px;
}

.typing-line {
    margin-bottom: 12px;
    opacity: 0;
    animation: fadeInLine 0.5s forwards;
}

.highlight-text { color: var(--brand-color); }
.success-text { color: var(--terminal-green); }

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin: 24px 0;
    opacity: 0;
    animation: fadeInLine 0.5s forwards;
}

.stat-box {
    background: #18181b;
    border: 1px solid #27272a;
    padding: 16px;
    border-radius: 8px;
    text-align: center;
}

.stat-label {
    color: #a1a1aa;
    font-size: 0.8rem;
    margin-bottom: 8px;
}

.stat-value {
    color: #fff;
    font-size: 1.5rem;
    font-weight: 700;
}

.unit {
    font-size: 0.8rem;
    color: var(--brand-color);
    margin-left: 2px;
}

.pulse-text {
    animation: textPulse 2s infinite alternate;
}

.delay-1 { animation-delay: 0.8s; }
.delay-2 { animation-delay: 1.5s; }
.delay-3 { animation-delay: 2.2s; }

@keyframes fadeInLine {
    to { opacity: 1; }
}

@keyframes textPulse {
    0% { color: #fff; }
    100% { color: var(--brand-color); text-shadow: 0 0 10px rgba(0,246,255,0.5); }
}

/* 定价区 */
.pricing-section {
    padding: 40px 0 100px;
}

.countdown {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 10px 24px;
    border-radius: 50px;
    font-family: var(--terminal-font);
    font-weight: 600;
    color: #fff;
    font-size: 0.95rem;
    border-color: rgba(255, 0, 122, 0.4);
}

#timer {
    color: var(--brand-secondary);
}

.pulsing-dot {
    width: 10px;
    height: 10px;
    background-color: var(--brand-secondary);
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(255, 0, 122, 0.7); }
    70% { box-shadow: 0 0 0 12px rgba(255, 0, 122, 0); }
    100% { box-shadow: 0 0 0 0 rgba(255, 0, 122, 0); }
}

/* 价格表网格 */
.pricing-table {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    align-items: stretch;
}

.pricing-card {
    padding: 40px 32px;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: transform 0.3s;
}

.pricing-card:hover {
    transform: translateY(-8px);
}

.pricing-card h3 {
    font-size: 1.5rem;
    margin-bottom: 8px;
    color: #fff;
}

.pricing-card .price {
    font-size: 3.5rem;
    font-weight: 900;
    margin-bottom: 24px;
    color: #fff;
    letter-spacing: -1px;
}

.pricing-card .price span {
    font-size: 1.1rem;
    color: var(--text-muted);
    font-weight: 400;
    font-family: 'Inter', sans-serif;
}

.pricing-card ul {
    list-style: none;
    margin-bottom: 32px;
    flex-grow: 1;
}

.pricing-card ul li {
    margin-bottom: 16px;
    color: var(--text-muted);
    font-size: 1.05rem;
    display: flex;
    align-items: center;
}

.check {
    color: var(--terminal-green);
    margin-right: 12px;
    font-weight: bold;
}

.card-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.card-actions .btn {
    width: 100%;
}

/* 核心推荐套餐魔改 */
.pricing-card.highlight {
    background: rgba(0, 246, 255, 0.03);
    border-color: var(--brand-color);
    box-shadow: 0 0 30px rgba(0, 246, 255, 0.1);
}

.badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--brand-color);
    color: #000;
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 800;
    white-space: nowrap;
}

/* SEO Articles Grid */
.seo-articles {
    padding: 80px 0;
}

.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.article-card {
    display: flex;
    flex-direction: column;
    padding: 24px;
    text-decoration: none;
    transition: transform 0.3s ease, border-color 0.3s ease;
    cursor: pointer;
}

.article-card:hover {
    transform: translateY(-5px);
    border-color: var(--brand-color);
    background: rgba(255, 255, 255, 0.05);
}

.article-meta {
    margin-bottom: 12px;
}

.badge-seo {
    background: rgba(0, 246, 255, 0.1);
    color: var(--brand-color);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-family: var(--terminal-font);
    font-weight: 600;
}

.article-card h3 {
    color: #fff;
    font-size: 1.2rem;
    margin-bottom: 12px;
    line-height: 1.4;
}

.article-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 20px;
    flex-grow: 1;
}

.read-more {
    color: var(--brand-secondary);
    font-size: 0.9rem;
    font-weight: 700;
    font-family: var(--terminal-font);
    margin-top: auto;
}

/* Bento Grid */
.features-bento {
    padding: 80px 0;
}

.bento-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.bento-item {
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    min-height: 240px;
    transition: all 0.3s ease;
}

.bento-item:hover {
    transform: translateY(-4px);
    border-color: var(--brand-color);
    background: rgba(255, 255, 255, 0.05);
}

.bento-item .icon {
    font-size: 3rem;
    margin-bottom: auto;
}

.bento-item h4 {
    font-size: 1.4rem;
    margin-bottom: 8px;
    color: #fff;
}

.bento-item p {
    color: var(--text-muted);
    font-size: 1.05rem;
}

.item-native-ip {
    background: linear-gradient(135deg, rgba(0, 246, 255, 0.05), transparent);
    border: 1px solid rgba(0, 246, 255, 0.2);
}

/* 核心优势卡片 */
.core-advantages {
    padding: 80px 0;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.advantage-card {
    padding: 40px 32px;
    text-align: center;
}

.advantage-card:hover {
    background: rgba(255,255,255,0.05);
}

.advantage-card .icon-large {
    font-size: 3.5rem;
    margin-bottom: 24px;
}

.advantage-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: #fff;
}

.advantage-card p {
    color: var(--text-muted);
    font-size: 1rem;
}

/* FAQ */
.faq {
    padding: 80px 0;
    max-width: 800px;
    margin: 0 auto;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.faq-item {
    padding: 24px 32px;
}

.faq-item h4 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: #fff;
}

.faq-item p {
    color: var(--text-muted);
}

/* 页脚 */
.footer {
    padding: 60px 0 100px;
    text-align: center;
    border-top: 1px solid var(--glass-border);
    margin-top: 40px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: #fff;
}

.copyright {
    color: rgba(255, 255, 255, 0.2);
    font-size: 0.85rem;
}

/* PBN SEO Links */
.pbn-links {
    margin-top: 24px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.75rem; /* Equivalent to text-xs */
    color: rgba(255, 255, 255, 0.15); /* Extremely low key grey */
}

.pbn-text {
    letter-spacing: 0.5px;
}

.pbn-link {
    color: rgba(255, 255, 255, 0.15);
    text-decoration: none;
    transition: color 0.2s ease;
}

.pbn-link:hover {
    color: #60a5fa; /* Tailwind's text-blue-400 */
}

.pbn-separator {
    color: rgba(255, 255, 255, 0.1);
}

/* 移动端悬浮 CTA */
.floating-cta {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 12px 16px;
    background: rgba(13, 13, 18, 0.9);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid var(--glass-border);
    z-index: 100;
}

/* 响应式适配 */
@media (max-width: 1024px) {
    .hero-split {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-text {
        text-align: center;
    }
    
    .hero-text p {
        margin: 0 auto 30px;
    }
    
    .hero-actions {
        justify-content: center;
    }

    .pricing-table {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pricing-card.highlight {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 20px;
    }
    
    .nav-menu {
        display: none; 
    }

    .hero-text h1 {
        font-size: 3rem;
    }
    
    .pricing-table, .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-card.highlight {
        grid-column: 1;
    }

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

    .footer {
        padding-bottom: 120px; 
    }

    .floating-cta {
        display: block;
    }
}