/* CSSVariantEngine v3.0 — zh-tianboapp.com.cn */
/* Palette: dense-dashboard | Radius: soft rounded | Shadow: multi-layer gradient */
/* Spacing: compact | Transition: long smooth gradient-rich */
/* Section layouts: {"news":"grid-4","features":"grid-2","hero":"left-aligned","testimonials":"grid-3","partners":"grid-6","faq":"with-sidebar","stats":"big-number","cta":"card-style"} */

:root {
    --color-primary: #3b82f6;
    --color-primary-dark: #2563eb;
    --color-accent: #60a5fa;
    --color-surface: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    --color-text: #1e293b;
    --rgb-primary: 59, 130, 246;
    --rgb-accent: 96, 165, 250;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --shadow-sm: 0 1px 3px rgba(30, 41, 59, 0.08), 0 2px 6px rgba(59, 130, 246, 0.06);
    --shadow-md: 0 2px 8px rgba(30, 41, 59, 0.1), 0 4px 16px rgba(59, 130, 246, 0.08), 0 8px 24px rgba(30, 41, 59, 0.05);
    --shadow-lg: 0 4px 12px rgba(30, 41, 59, 0.12), 0 8px 28px rgba(59, 130, 246, 0.1), 0 16px 48px rgba(30, 41, 59, 0.08);
    --space-section: 3.5rem;
    --space-card: 1rem;
    --space-gap: 0.875rem;
    --transition: 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
    --heading-weight: 800;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { 
    color: var(--color-text); 
    line-height: var(--body-line-height); 
    background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] { 
    border-radius: var(--radius-lg); 
    box-shadow: var(--shadow-md); 
    padding: var(--space-card); 
    transition: var(--transition); 
    background: #ffffff;
    border: 1px solid transparent;
    border-image: linear-gradient(135deg, #3b82f6 0%, #93c5fd 100%) 1;
}
.btn, button[class*="btn"], a[class*="btn"] { 
    border-radius: var(--radius-md); 
    transition: var(--transition); 
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: #ffffff;
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

/* ========== Section Layout Variants ========== */

/* news: grid-4 */
/* 四列紧凑网格 */
.news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 0.8); }

/* features: grid-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }

/* hero: left-aligned */
.hero-content { text-align: left; max-width: 600px; }

/* testimonials: grid-3 */
.testimonial-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
.faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }

/* stats: big-number */
/* 大数字居中 */
.stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
.stats-grid .stat-value { font-size: 3rem; color: #3b82f6; }

/* cta: card-style */
.cta-inner { 
    background: var(--color-surface); 
    border-radius: var(--radius-xl); 
    padding: 3rem; 
    text-align: center; 
    border: 2px solid transparent;
    border-image: linear-gradient(135deg, #3b82f6 0%, #60a5fa 50%, #93c5fd 100%) 1;
}

/* Page Layout: wide */
/* 超宽 */
.page-main { max-width: 1400px; margin: 0 auto; }

/* 条件性装饰 */
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 8px rgba(var(--rgb-primary), 0.3); }
.hero, [class*="hero"], section:first-of-type { 
    background: linear-gradient(135deg, #1e293b 0%, #334155 40%, #3b82f6 100%); 
}

/* Responsive */
@media (max-width: 1024px) {
    .news-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .feature-list { grid-template-columns: repeat(2, 1fr) !important; }
    .partner-grid { grid-template-columns: repeat(3, 1fr) !important; }
    .stats-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .hero-inner { grid-template-columns: 1fr !important; }
}
@media (max-width: 640px) {
    :root { --space-section: 1.5rem; --space-card: 0.75rem; --space-gap: 0.5rem; }
    .news-grid { grid-template-columns: 1fr !important; }
    .feature-list { grid-template-columns: 1fr !important; }
    .faq-list { grid-template-columns: 1fr !important; }
    .testimonial-list { column-count: 1 !important; }
    .partner-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .stats-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .cta-inner { grid-template-columns: 1fr !important; }
}