/* 
 * 宝云 BaoYun - 引力宝珠 (Gravity Orb) 风格
 */

:root {
    --bg: #0A0F1A;
    --panel: #101624;
    --ink: #E7ECF4;
    --dim: #7D899E;
    --line: rgba(231,236,244,0.09);
    --acc: #D8B96A;
    --border-radius: 3px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--ink);
    background-color: var(--bg);
    line-height: 1.8;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: var(--acc);
    transition: var(--transition);
}

a:hover {
    color: var(--ink);
}

ul {
    list-style: none;
}

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

.grid { display: grid; gap: 30px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.align-center { align-items: center; }
.text-center { text-align: center; }
.mt-2 { margin-top: 2rem; }

section { padding: 80px 0; }

/* Typography */
h1, h2, h3, h4, .logo, .section-title {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, serif;
    font-weight: 600;
    color: var(--ink);
}

h1 { font-size: 3.5rem; line-height: 1.2; margin-bottom: 1.5rem; }
.section-title { text-align: center; font-size: 2.2rem; margin-bottom: 3rem; }

.subtitle, p { color: var(--dim); }

.badge, .price, .nav-links a, .btn, .icon, .author, .g-item {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-size: 11px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    min-height: 44px;
    font-size: 13px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    border: 1px solid var(--line);
}

.btn-primary {
    background-color: var(--acc);
    color: var(--bg);
    border-color: var(--acc);
    font-weight: 500;
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--acc);
    border-color: rgba(216,185,106,0.5);
}

.btn-outline {
    background-color: transparent;
    color: var(--acc);
    border-color: var(--acc);
}

.btn-outline:hover {
    background-color: var(--acc);
    color: var(--bg);
}

.btn-large { padding: 16px 36px; font-size: 13px; }
.btn-block { display: block; width: 100%; }

/* Nav */
.navbar {
    background: rgba(10, 15, 26, 0.85);
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 70px;
    padding: 10px 0;
    flex-wrap: wrap;
}

.nav-links {
    display: flex;
    gap: 24px;
    align-items: center;
}

.nav-links a { color: var(--dim); font-size: 12px; }
.nav-links a:hover { color: var(--acc); }

.logo { font-size: 1.5rem; color: var(--ink); }

/* Hero */
.hero { text-align: center; padding: 100px 0; }
.hero .subtitle { max-width: 700px; margin: 0 auto 2.5rem; color: var(--dim); }

/* Cards & Panels */
.card {
    background: var(--panel);
    padding: 30px;
    border: 1px solid var(--line);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.card:hover {
    border-color: rgba(216,185,106,0.5);
    transform: translateY(-5px);
}

.card:hover h3, .card:hover .icon {
    color: var(--acc);
}

.icon {
    color: var(--line);
    font-size: 13px;
    margin-bottom: 1rem;
    transition: var(--transition);
}

.feature-card h3 { margin-bottom: 1rem; font-size: 1.25rem; }

/* Lists */
.check-list { margin: 1.5rem 0; color: var(--dim); }
.check-list li { position: relative; padding-left: 30px; margin-bottom: 10px; }
.check-list li::before {
    content: '//';
    position: absolute;
    left: 0;
    color: var(--acc);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
}

.graphic-box {
    display: flex;
    flex-direction: column;
    gap: 15px;
    padding: 20px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--border-radius);
}

.g-item {
    background: transparent;
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: var(--border-radius);
    text-align: center;
    color: var(--dim);
    border-left: 2px solid var(--acc);
    transition: var(--transition);
    font-size: 12px;
}

.g-item:hover {
    border-color: rgba(216,185,106,0.5);
    color: var(--acc);
}

/* Pricing */
.pricing-card { text-align: center; position: relative; }
.pricing-card.popular { border-color: rgba(216,185,106,0.3); }
.pricing-card.popular:hover { border-color: rgba(216,185,106,0.8); }

.pricing-card .badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--acc);
    color: var(--bg);
    padding: 4px 12px;
    border-radius: var(--border-radius);
}

.pricing-card h3 { font-size: 1.5rem; margin-bottom: 1rem; }
.pricing-card .price { font-size: 2.5rem; color: var(--ink); margin-bottom: 1.5rem; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace; }
.pricing-card .price span { font-size: 12px; color: var(--dim); font-weight: normal; }

.pricing-card .feature-list { margin-bottom: 2rem; text-align: left; color: var(--dim); }
.pricing-card .feature-list li { padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 13px; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
    background: var(--panel);
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: var(--border-radius);
    margin-bottom: 15px;
    transition: var(--transition);
}
.faq-item:hover { border-color: rgba(216,185,106,0.5); }
.faq-item h4 { margin-bottom: 10px; font-size: 1.1rem; }

/* Footer */
.footer { border-top: 1px solid var(--line); padding: 40px 0; text-align: center; margin-top: 60px; background: transparent; }
.footer-links { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; margin-bottom: 20px; }
.footer-links a { color: var(--dim); font-size: 11px; }
.footer-links a:hover { color: var(--acc); }
.copyright { color: rgba(231,236,244,0.2); font-size: 11px; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace; }

/* Canvas Labels */
.bg-label {
    position: fixed;
    z-index: -1;
    font-size: 11px;
    color: var(--dim);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    pointer-events: none;
}
.bg-label.top-left { top: 20px; left: 20px; }
.bg-label.bottom-left { bottom: 20px; left: 20px; }
.bg-label.top-right { top: 20px; right: 20px; text-align: right; }
.bg-label.bottom-right { bottom: 20px; right: 20px; text-align: right; }
#gravity-bg { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; z-index: -2; pointer-events: none; background: var(--bg); }

/* Scroll Reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: all 0.8s ease-out; }
.reveal.active { opacity: 1; transform: translateY(0); }

/* Subpages */
.page-header { border-bottom: 1px solid var(--line); padding: 60px 0; text-align: center; margin-bottom: 40px; }
.page-header h1 { font-size: 2.5rem; }
.page-content { max-width: 800px; margin: 0 auto 80px; padding: 0 20px; color: var(--dim); }
.page-content h2 { margin: 2rem 0 1rem; color: var(--ink); }
.page-content ul { list-style: disc; margin-left: 20px; margin-bottom: 1rem; }
.page-content li { margin-bottom: 0.5rem; }

/* Responsive */
@media (max-width: 768px) {
    .grid-3, .grid-2 { grid-template-columns: 1fr; }
    h1 { font-size: 2.5rem; }
    section { padding: 50px 0; }
    .section-title { font-size: 1.8rem; margin-bottom: 2rem; }
    .btn { width: 100%; margin-bottom: 10px; }
    .nav-container { padding: 0 15px; }
    .nav-links { order: 3; width: 100%; justify-content: center; margin-top: 15px; gap: 15px; }
}


/* A11y: Skip to content */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--acc);
    color: #000;
    padding: 8px;
    z-index: 9999;
    transition: top 0.2s ease;
}
.skip-link:focus {
    top: 0;
}

/* A11y: Focus visible */
*:focus-visible {
    outline: 2px solid var(--acc);
    outline-offset: 2px;
}

/* Scroll margin for fixed header */
#features, #pricing, #faq, #media-ai {
    scroll-margin-top: 80px;
}

/* Pricing Table styling */
.table-responsive {
    width: 100%;
    overflow-x: auto;
}
.pricing-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    text-align: left;
}
.pricing-table caption {
    display: none; /* Screen reader only */
}
.pricing-table th, .pricing-table td {
    padding: 20px;
    border: 1px solid var(--line);
    background: var(--panel);
    vertical-align: top;
}
.pricing-table th {
    font-size: 1.2rem;
    color: var(--acc);
    background: rgba(10, 15, 26, 0.8);
}
.pricing-table td .price {
    font-size: 2rem;
    font-weight: bold;
    color: var(--ink);
    margin-bottom: 20px;
}
.pricing-table td .price span {
    font-size: 1rem;
    color: var(--dim);
}
.pricing-table td .feature-list {
    margin-bottom: 30px;
}
.pricing-table td.popular-col {
    border: 1px solid var(--acc);
    position: relative;
}

/* Details/Summary overrides */
details.faq-item > summary {
    cursor: pointer;
    list-style: none;
}
details.faq-item > summary::-webkit-details-marker {
    display: none;
}