/* OptionPet 落地页 - 华尔街风格 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-dark: #0a0e17;
    --bg-card: #0d1117;
    --border-subtle: #21262d;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --accent-gold: #c9a227;
    --accent-green: #238636;
    --accent-gold-dim: rgba(201, 162, 39, 0.15);
}

body {
    font-family: 'Source Sans 3', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.landing-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 48px 24px 32px;
    max-width: 960px;
    margin: 0 auto;
}

/* Header */
.landing-header {
    text-align: center;
    margin-bottom: 56px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border-subtle);
}

.logo-section {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 12px;
}

.logo-icon {
    height: 56px;
    width: auto;
    object-fit: contain;
}

.brand-name {
    font-size: 2.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    font-family: 'Source Sans 3', sans-serif;
}

.tagline {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 400;
    letter-spacing: 0.08em;
}

/* Main Content */
.landing-content {
    flex: 1;
    width: 100%;
}

.intro-section {
    margin-bottom: 48px;
}

.section-title {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--accent-gold);
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--accent-gold-dim);
}

.intro-text {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 640px;
}

/* Features Grid */
.features-section {
    margin-bottom: 56px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 20px;
}

.feature-item {
    padding: 24px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    text-align: center;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.feature-item:hover {
    border-color: var(--accent-gold);
    box-shadow: 0 0 0 1px var(--accent-gold-dim);
}

.feature-icon {
    font-size: 1.5rem;
    color: var(--accent-gold);
    margin-bottom: 12px;
}

.feature-item h3 {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.feature-item p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* CTA Section */
.cta-section {
    text-align: center;
    padding: 32px 0;
}

.btn-enter {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 36px;
    background: var(--accent-gold);
    color: var(--bg-dark);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
    letter-spacing: 0.04em;
}

.btn-enter:hover {
    background: #d4ad2e;
    transform: translateY(-1px);
}

.btn-enter:active {
    transform: translateY(0);
}

/* Footer */
.landing-footer {
    margin-top: auto;
    padding-top: 32px;
    border-top: 1px solid var(--border-subtle);
}

.beian-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.beian-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.beian-icon {
    height: 14px;
    width: auto;
    vertical-align: middle;
}

.beian-item a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.beian-item a:hover {
    color: var(--text-primary);
}

/* Responsive */
@media (max-width: 600px) {
    .landing-container {
        padding: 32px 16px 24px;
    }

    .landing-header {
        margin-bottom: 40px;
    }

    .brand-name {
        font-size: 1.875rem;
    }

    .logo-icon {
        height: 44px;
    }

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

    .btn-enter {
        padding: 12px 28px;
        font-size: 0.9375rem;
    }
}