/* 谁啊这是 App 落地页专属样式 */
.app-hero {
    background: linear-gradient(135deg, #007AFF 0%, #5856D6 50%, #AF52DE 100%);
    color: white;
    min-height: 100vh;
    display: flex;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.app-hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(circle at 30% 20%, rgba(255,255,255,0.1) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(255,255,255,0.08) 0%, transparent 40%);
}
.app-icon {
    width: 180px;
    height: 180px;
    border-radius: 40px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    margin-bottom: 2rem;
    animation: float 3s ease-in-out infinite;
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}
.app-name {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}
.app-tagline {
    font-size: 1.5rem;
    opacity: 0.95;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}
.coming-soon-badge {
    display: inline-block;
    background: rgba(255,255,255,0.2);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.3);
    padding: 14px 32px;
    border-radius: 27px;
    font-size: 1.1rem;
    font-weight: 500;
    color: white;
}
.app-store-badge { display: inline-block; transition: transform 0.3s ease; }
.app-store-badge:hover { transform: scale(1.05); }
.app-store-badge img { height: 54px; }

/* 功能区块 */
.features { background: var(--bg); padding: 100px 0; }
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}
.feature-card {
    background: var(--card);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    text-align: center;
}
.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.12);
}
.feature-icon { font-size: 3.5rem; margin-bottom: 1.5rem; }
.feature-card h3 { font-size: 1.4rem; color: var(--heading); margin-bottom: 1rem; }
.feature-card p { color: var(--muted); line-height: 1.7; }

/* 差异化区块 */
.difference { background: var(--bg-alt); padding: 100px 0; }
.diff-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}
.diff-text h3 { font-size: 2rem; color: var(--heading); margin-bottom: 1.5rem; }
.diff-text p { color: var(--muted); font-size: 1.1rem; line-height: 1.8; margin-bottom: 1.5rem; }
.diff-list { list-style: none; }
.diff-list li {
    padding: 0.8rem 0;
    padding-left: 2rem;
    position: relative;
    color: var(--text);
    font-size: 1.05rem;
}
.diff-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #34C759;
    font-weight: bold;
    font-size: 1.2rem;
}
.diff-visual { display: flex; justify-content: center; align-items: center; }
.graph-preview {
    width: 100%;
    max-width: 400px;
    aspect-ratio: 1;
    background: linear-gradient(135deg, #007AFF 0%, #5856D6 100%);
    border-radius: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 20px 60px rgba(0,122,255,0.3);
}
.graph-preview::before { content: '🕸️'; font-size: 8rem; opacity: 0.9; }

/* 定价区块 */
.pricing { background: var(--bg); padding: 100px 0; }
.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}
.pricing-card {
    background: var(--card);
    border-radius: 24px;
    padding: 3rem;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0,0,0,0.08);
    position: relative;
    transition: all 0.3s ease;
}
.pricing-card:hover { transform: translateY(-5px); }
.pricing-card.featured { border: 2px solid #007AFF; }
.pricing-card.featured::before {
    content: '推荐';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: #007AFF;
    color: white;
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}
.pricing-card h3 { font-size: 1.5rem; color: var(--heading); margin-bottom: 0.5rem; }
.pricing-card .price { font-size: 3rem; font-weight: 700; color: var(--heading); margin: 1rem 0; }
.pricing-card .price span { font-size: 1rem; font-weight: 400; color: var(--muted); }
.pricing-card .price-desc { color: var(--muted); margin-bottom: 2rem; }
.pricing-features { list-style: none; text-align: left; margin-bottom: 2rem; }
.pricing-features li { padding: 0.6rem 0; padding-left: 1.8rem; position: relative; color: var(--text); }
.pricing-features li::before { content: '✓'; position: absolute; left: 0; color: #34C759; font-weight: bold; }

/* FAQ 区块 */
.faq { background: var(--bg-alt); padding: 100px 0; }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
    background: var(--card);
    border-radius: 16px;
    margin-bottom: 1rem;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}
.faq-question {
    padding: 1.5rem 2rem;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--heading);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s ease;
}
.faq-question:hover { background: var(--bg-alt); }
.faq-question::after { content: '+'; font-size: 1.5rem; color: var(--muted); transition: transform 0.3s ease; }
.faq-item.active .faq-question::after { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.faq-item.active .faq-answer { max-height: 500px; }
.faq-answer p { padding: 0 2rem 1.5rem; color: var(--muted); line-height: 1.7; }

/* CTA 区块 */
.cta {
    background: linear-gradient(135deg, #007AFF 0%, #5856D6 100%);
    padding: 80px 0;
    text-align: center;
    color: white;
}
.cta h2 { font-size: 2.5rem; margin-bottom: 1rem; }
.cta p { font-size: 1.2rem; opacity: 0.9; margin-bottom: 2rem; }

/* App 页脚 */
.app-footer { background: var(--footer-bg); color: white; padding: 3rem 0 1.5rem; }
.app-footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 2rem;
}
.app-footer-brand { display: flex; align-items: center; gap: 1rem; }
.app-footer-brand img { width: 48px; height: 48px; border-radius: 12px; }
.app-footer-brand h3 { color: white; font-size: 1.3rem; }
.app-footer-links { display: flex; gap: 2rem; flex-wrap: wrap; }
.app-footer-links a { color: #bdc3c7; text-decoration: none; transition: color 0.3s ease; }
.app-footer-links a:hover { color: white; }
.app-footer-bottom { text-align: center; padding-top: 2rem; border-top: 1px solid var(--footer-border); color: #bdc3c7; }
.app-footer-bottom a { color: #bdc3c7; text-decoration: none; }
.app-footer-bottom a:hover { color: var(--brand); }

/* 法律页面样式 */
.legal-page { padding-top: 100px; padding-bottom: 60px; min-height: 100vh; background: var(--bg); }
.legal-content { max-width: 800px; margin: 0 auto; }
.legal-content h1 { font-size: 2.5rem; color: var(--heading); margin-bottom: 0.5rem; }
.legal-content .update-date { color: var(--muted); margin-bottom: 2rem; }
.legal-content h2 { font-size: 1.5rem; color: var(--heading); margin-top: 2rem; margin-bottom: 1rem; }
.legal-content p, .legal-content li { color: var(--text); line-height: 1.8; margin-bottom: 1rem; }
.legal-content ul { padding-left: 1.5rem; }
.legal-content a { color: var(--brand); }

/* 响应式 */
@media (max-width: 768px) {
    .app-name { font-size: 3rem; }
    .app-icon { width: 140px; height: 140px; border-radius: 32px; }
    .diff-content { grid-template-columns: 1fr; }
    .diff-visual { order: -1; }
    .graph-preview { max-width: 280px; }
    .pricing-cards { grid-template-columns: 1fr; }
    .app-footer-content { flex-direction: column; align-items: center; text-align: center; }
    .app-footer-links { justify-content: center; }
    .cta h2 { font-size: 2rem; }
    .legal-content h1 { font-size: 2rem; }
}