/* style.css - Clean Dark Space Tech Blue */
:root {
    --primary-color: #3B82F6; /* 电光蓝 */
    --primary-hover: #2563EB;
    --text-main: #E2E8F0;
    --text-light: #94A3B8;
    --bg-dark: #0B1026; /* 深夜蓝 */
    --bg-card: rgba(255, 255, 255, 0.03); 
    --bg-card-hover: rgba(255, 255, 255, 0.05);
    --border-color: rgba(255, 255, 255, 0.08); 
    --glow-shadow: 0 0 20px rgba(59, 130, 246, 0.15);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-main);
    line-height: 1.6;
    /* CSS Radial Gradient replicating the clean dark space look */
    
    background-color: transparent;
    background-attachment: fixed;
    scroll-behavior: smooth;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3 {
    margin-bottom: 20px;
    font-weight: 600;
    color: #ffffff;
}

h2 {
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: 40px;
}

/* Header */
header {
    padding-top: 15px;
    position: relative;
    z-index: 100;
}

header .header-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.25rem;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: 0.5px;
}

.centered-nav {
    display: flex;
    gap: 35px;
}

.centered-nav a {
    text-decoration: none;
    color: var(--text-light);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

.centered-nav a:hover {
    color: #ffffff;
}

.header-right {
    text-align: right;
}

.btn-header {
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    padding: 8px 20px;
    color: #ffffff;
    text-decoration: none;
    font-size: 0.85rem;
    transition: 0.3s;
}

.btn-header:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 80px 20px 200px; /* Space for bottom waves */
    position: relative;
}

.pill-badge {
    display: inline-block;
    padding: 6px 20px;
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.03);
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 30px;
    letter-spacing: 1px;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.hero p {
    font-size: 1.1rem;
    color: var(--text-light);
    letter-spacing: 1px;
}

.btn-primary-glow {
    background: var(--primary-color);
    color: #ffffff;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    box-shadow: 0 0 25px rgba(59, 130, 246, 0.5);
    transition: 0.3s;
}

.btn-primary-glow:hover {
    box-shadow: 0 0 35px rgba(59, 130, 246, 0.8);
    transform: translateY(-2px);
}

.btn-outline-glow {
    background: transparent;
    color: #ffffff;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: 0.3s;
}

.btn-outline-glow:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.4);
}

/* Hero Bottom Graphics (Waves & Stats) */
.hero-bottom-graphics {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 250px;
    overflow: hidden;
    pointer-events: none;
}

.waves {
    width: 100%;
    height: 100%;
    display: block;
}

.stats-container {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 80px;
    z-index: 3;
}

.stat-box {
    text-align: center;
    position: relative;
}

.stat-box:not(:last-child)::after {
    content: '';
    position: absolute;
    right: -40px;
    top: 30%;
    height: 40%;
    width: 1px;
    background: rgba(255, 255, 255, 0.2);
}

.stat-num {
    font-size: 1.5rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 2px;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* Section padding */
section:not(.hero) {
    padding: 80px 0;
    position: relative;
    z-index: 5;
}

/* Buttons (Legacy support for other sections) */
.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: #ffffff;
    padding: 12px 24px;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.2);
}

.btn:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
}

/* Features grid */
.grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(59, 130, 246, 0.4);
    transform: translateY(-5px);
}

.card p {
    color: var(--text-light);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

/* Pricing */
.pricing-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px;
    text-align: center;
    transition: all 0.3s ease;
}

.pricing-card:hover {
    transform: translateY(-5px);
    border-color: rgba(59, 130, 246, 0.4);
}

.pricing-card.popular {
    border-color: var(--primary-color);
    background: rgba(59, 130, 246, 0.05);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: #ffffff;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 20px 0;
}

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

.features-list {
    list-style: none;
    margin: 30px 0;
    text-align: left;
}

.features-list li {
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-main);
}

.features-list li::before {
    content: "✓";
    color: var(--primary-color);
    margin-right: 10px;
    font-weight: bold;
}

.pricing-card .btn {
    width: 100%;
    border-radius: 50px;
}

/* FAQ */
.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 15px;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: rgba(59, 130, 246, 0.3);
}

.faq-item h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    color: #ffffff;
}

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

/* Reviews */
.review-card {
    text-align: left;
    padding: 30px;
}

.review-text {
    font-style: italic;
    margin-bottom: 20px;
    color: var(--text-main);
}

.reviewer {
    font-weight: 500;
    color: var(--primary-color);
}

/* Footer */
footer {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 60px 0 20px;
    color: var(--text-light);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    color: #ffffff;
    font-size: 1.1rem;
    margin-bottom: 20px;
}

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

.footer-col ul li {
    margin-bottom: 10px;
}

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

.footer-col a:hover {
    color: #ffffff;
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 20px;
    font-size: 0.9rem;
}

/* Subpages styles */
.page-content { 
    padding: 60px 40px; 
    max-width: 800px; 
    margin: 40px auto; 
    min-height: calc(100vh - 250px);
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 16px;
    border: 1px solid var(--border-color);
}
.page-content h2 { 
    text-align: left; 
    font-size: 1.5rem; 
    margin: 30px 0 15px; 
}
.page-content p { 
    margin-bottom: 15px; 
}
.page-content ul { 
    padding-left: 20px; 
    margin-bottom: 15px; 
}
.page-content ul li {
    margin-bottom: 8px;
}
.page-content a {
    color: var(--primary-color);
}
.page-content-header {
    text-align: center;
    margin-bottom: 40px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 20px;
}

/* Media Queries for Mobile */
@media (max-width: 768px) {
    .grid, #media-ai .grid {
        grid-template-columns: 1fr !important;
    }
    
    header .header-grid {
        grid-template-columns: 1fr auto;
    }
    
    .centered-nav {
        display: none !important;
    }
    
    .hero {
        padding: 60px 20px 220px;
    }

    .hero h1 {
        font-size: 2.2rem;
    }
    
    .stats-container {
        gap: 20px;
        width: 100%;
        justify-content: center;
    }
    
    .stat-box:not(:last-child)::after {
        right: -10px;
    }
    
    .stat-num {
        font-size: 1.2rem;
    }
    
    .btn-primary-glow, .btn-outline-glow {
        padding: 12px 24px;
        width: 100%;
        text-align: center;
    }
    
    .hero > div > div[style*="display: flex"] {
        flex-direction: column;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
}