/* Modern Enterprise-Grade Tech CSS - RedApricot Cloud (红杏云) */
:root {
    --bg-color: #F5F8FF;
    --text-color: #0B1B3F;
    --text-muted: #5b6a8f;
    --primary-color: #1E5EFF;
    --primary-hover: #1545CC;
    --accent-orange: #FF9A62;
    --border-color: #DCE6F8;
    --white: rgba(255, 255, 255, 0.85);
    --white-solid: #ffffff;
    --shadow-soft: 0 12px 32px rgba(11, 27, 63, 0.05);
    --shadow-hover: 0 16px 48px rgba(30, 94, 255, 0.12);
    --border-radius: 16px;
    --border-radius-pill: 9999px;
    --font-zh: 'Noto Sans SC', sans-serif;
    --font-en: 'Inter', -apple-system, sans-serif;
    --font-display: 'Space Grotesk', sans-serif;
}

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

body {
    font-family: var(--font-en);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    position: relative;
}
body::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; height: 800px;
    background-image: 
      linear-gradient(rgba(30, 94, 255, 0.03) 1px, transparent 1px),
      linear-gradient(90deg, rgba(30, 94, 255, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: -1;
    pointer-events: none;
    mask-image: linear-gradient(to bottom, rgba(0,0,0,1) 0%, rgba(0,0,0,0) 100%);
    -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,1) 0%, rgba(0,0,0,0) 100%);
}

h1, h2, h3, .logo-zh {
    font-family: var(--font-zh);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-color);
}
h1 { font-size: 3.5rem; letter-spacing: -1px; line-height: 1.2; }
h2.section-title { font-size: 2.5rem; text-align: center; margin: 5rem 0 3rem; }
h3 { font-size: 1.25rem; }

a { text-decoration: none; color: var(--primary-color); transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); }

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

/* Header */
.header {
    padding: 24px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 16px 32px;
    border-radius: var(--border-radius-pill);
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(255,255,255,0.5);
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}
.logo-icon {
    width: 36px;
    height: 36px;
}
.logo-text {
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.logo-zh {
    font-size: 1.125rem;
    line-height: 1.1;
    margin: 0;
    font-weight: 700;
}
.logo-en {
    font-family: var(--font-display);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--primary-color);
    line-height: 1.1;
}

.main-nav a {
    margin-left: 32px;
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.95rem;
}
.main-nav a:hover { color: var(--primary-color); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 32px;
    border-radius: var(--border-radius-pill);
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.btn-primary {
    background: linear-gradient(135deg, #3E7BFF 0%, #7B5CFF 100%);
    color: #fff;
    box-shadow: 0 8px 24px rgba(62, 123, 255, 0.25);
}
.btn-primary:hover {
    box-shadow: 0 12px 32px rgba(62, 123, 255, 0.4);
    transform: translateY(-2px);
    color: #fff;
}
.btn-secondary {
    background-color: var(--white-solid);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(11, 27, 63, 0.03);
}
.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}
.btn-small {
    padding: 10px 24px;
    font-size: 0.9rem;
    background-color: var(--bg-color);
    color: var(--primary-color);
}

/* Glassmorphism Cards */
.card {
    background: var(--white);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-color);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(62, 123, 255, 0.2);
}

/* Hero */
.hero {
    text-align: center;
    padding: 100px 20px 80px;
}
.hero-content {
    max-width: 800px;
    margin: 0 auto;
}
.hero h1 {
    background: linear-gradient(135deg, #0B1B3F 0%, #1E5EFF 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 24px;
}
.hero h2 {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 24px;
}
.hero p {
    font-size: 1.125rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 48px;
}
.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

/* Grids */
.feature-grid, .media-grid, .pricing-grid, .review-grid {
    display: grid;
    gap: 24px;
}
.feature-grid { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.media-grid { grid-template-columns: repeat(auto-fit, minmax(400px, 1fr)); }
.pricing-grid { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); align-items: start; }
.review-grid { grid-template-columns: repeat(auto-fit, minmax(400px, 1fr)); }

/* Feature Cards (Removing img if missing, adding pseudo-icons for tech feel) */
.card h3 { display: flex; align-items: center; gap: 12px; }
.card h3::before {
    content: '';
    display: block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent-orange);
}
.feature-grid .card p { color: var(--text-muted); }

/* Pricing */
.price-card {
    text-align: center;
    position: relative;
    overflow: hidden;
}
.price-card h3::before { display: none; }
.price-card h3 { justify-content: center; font-size: 1.5rem; }
.price-card.highlight {
    border: 2px solid var(--primary-color);
    transform: scale(1.02);
    background: var(--white-solid);
}
.price-card.highlight::before {
    content: 'RECOMMENDED';
    position: absolute;
    top: 16px;
    right: -32px;
    background: var(--primary-color);
    color: #fff;
    font-size: 0.7rem;
    font-family: var(--font-display);
    font-weight: 700;
    padding: 4px 40px;
    transform: rotate(45deg);
    letter-spacing: 0.1em;
}
.price-card.highlight:hover { transform: scale(1.02) translateY(-8px); }
.price {
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text-color);
    margin: 24px 0;
    line-height: 1;
}
.price span { font-size: 1.2rem; color: var(--text-muted); font-family: var(--font-en); font-weight: 500; }
.price-card ul {
    list-style: none;
    margin-bottom: 32px;
    text-align: left;
}
.price-card li {
    padding: 12px 0;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
}
.price-card li::before {
    content: '✓';
    color: var(--primary-color);
    font-weight: bold;
    margin-right: 12px;
}
.price-card li:last-child { border-bottom: none; }

/* Reviews & FAQ */
.review-card span { font-family: var(--font-display); font-size: 0.9rem; color: var(--primary-color); font-weight: 600; display: block; margin-top: 16px; }
.faq-card h3 { justify-content: flex-start; }

/* Footer */
.footer {
    background: var(--white-solid);
    margin-top: 100px;
    padding: 80px 0 40px;
    border-radius: 40px 40px 0 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}
.footer-brand h2 { color: var(--text-color); margin-bottom: 8px; }
.footer-brand p { color: var(--text-muted); font-size: 0.95rem; }
.footer-links {
    margin: 40px 0;
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}
.footer-links a { color: var(--text-muted); font-weight: 500; }
.footer-links a:hover { color: var(--primary-color); }
.copyright {
    margin-top: 60px;
    color: #94a3b8;
    font-size: 0.85rem;
}

/* Media Queries */
@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2.section-title { font-size: 2rem; margin: 3rem 0 2rem; }
    .nav-wrapper { flex-direction: column; gap: 16px; padding: 20px; border-radius: 24px; }
    .main-nav a { margin: 0 12px; }
    .hero-buttons { flex-direction: column; width: 100%; }
    .btn { width: 100%; }
    .price-card.highlight { transform: scale(1); }
    .price-card.highlight:hover { transform: scale(1) translateY(-8px); }
    .media-grid, .review-grid, .feature-grid, .pricing-grid { grid-template-columns: 1fr; }
}