:root {
    --primary-color: #6366f1;
    --secondary-color: #a855f7;
    --accent-color: #ec4899;
    --bg-dark: #0f172a;
    --text-light: #f8fafc;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --form-bg: #1a1a1a;
    --input-bg: #2a2a2a;
    --btn-primary: #457b88; /* Mimicking the color in the screenshot */
    --btn-hover: #3a6b77;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-light);
    overflow-x: hidden;
    scroll-behavior: smooth;
}

/* Hero Section (Page 1) */
.hero {
    height: 100vh;
    width: 100%;
    background: linear-gradient(rgba(0,0,0,0.3), rgba(0,0,0,0.3)), url('hero-bg.png');
    background-size: cover;
    background-position: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
}

.hero-content {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    padding: 3rem;
    border-radius: 2rem;
    border: 1px solid var(--glass-border);
    max-width: 800px;
    animation: fadeIn 1.5s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, #fff, #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-btn {
    padding: 1rem 3rem;
    font-size: 1.2rem;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    text-decoration: none;
    display: inline-block;
}

.cta-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.4);
}


/* Pricing Table */
.pricing-section {
    padding: 5rem 2rem;
    background: #0f172a;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.price-card {
    background: #1e293b;
    padding: 3rem 2rem;
    border-radius: 2rem;
    text-align: center;
    border: 1px solid #334155;
    transition: transform 0.3s;
}

.price-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
}

.price-card.featured {
    border: 2px solid var(--primary-color);
    position: relative;
}

.price-card.featured::after {
    content: "推荐";
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-size: 0.8rem;
}

.price-card h3 { font-size: 1.8rem; margin-bottom: 1rem; }
.price-card .price { font-size: 3rem; font-weight: bold; margin-bottom: 1.5rem; color: var(--primary-color); }
.price-card .price span { font-size: 1rem; color: #94a3b8; }
.price-card ul { list-style: none; margin-bottom: 2rem; text-align: left; }
.price-card ul li { margin-bottom: 0.8rem; color: #cbd5e1; }
.price-card ul li::before { content: "✓"; color: var(--primary-color); margin-right: 0.5rem; }

/* FAQ & Reviews */
.faq-section, .reviews-section {
    padding: 5rem 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.faq-item {
    background: #1e293b;
    margin-bottom: 1rem;
    border-radius: 1rem;
    overflow: hidden;
}

.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    font-weight: bold;
    display: flex;
    justify-content: space-between;
}

.faq-answer {
    padding: 0 1.5rem 1.5rem;
    color: #94a3b8;
    display: none;
}

.faq-item.active .faq-answer { display: block; }

.review-card {
    background: #1e293b;
    padding: 2rem;
    border-radius: 1rem;
    margin-bottom: 2rem;
    border-left: 4px solid var(--primary-color);
}

.review-card p { font-style: italic; margin-bottom: 1rem; }
.review-card .author { font-weight: bold; color: var(--primary-color); }

/* Article List */
.article-section {
    padding: 5rem 2rem;
    background: #111827;
}

.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.article-link {
    background: #1f2937;
    padding: 1.5rem;
    border-radius: 1rem;
    text-decoration: none;
    color: white;
    transition: background 0.3s;
}

.article-link:hover { background: #374151; }

footer {
    padding: 3rem 2rem;
    text-align: center;
    border-top: 1px solid #334155;
    color: #64748b;
}