/* CSSVariantEngine v3.0 — ogdianjing.org.cn */
/* Palette: coastal-sunset | Radius: soft-rounded | Shadow: multi-layer-gradient */
/* Spacing: spacious | Transition: smooth-slow */
/* Section layouts: {"news":"featured-left","features":"grid-4","hero":"centered","testimonials":"stacked","partners":"centered","faq":"single-column","stats":"big-number","cta":"card-style"} */

:root {
    --color-primary: #165DFF;
    --color-primary-dark: #0E42D2;
    --color-accent: #FF7D00;
    --color-surface: linear-gradient(135deg, #f0f9ff 0%, #e6f7ff 50%, #fff7ed 100%);
    --color-text: #1e293b;
    --rgb-primary: 22,93,255;
    --rgb-accent: 255,125,0;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 22px;
    --radius-xl: 32px;
    --shadow-sm: 0 2px 8px rgba(22,93,255,0.07), 0 1px 3px rgba(255,125,0,0.05);
    --shadow-md: 0 4px 16px rgba(22,93,255,0.1), 0 2px 6px rgba(255,125,0,0.07), 0 1px 2px rgba(0,0,0,0.03);
    --shadow-lg: 0 8px 32px rgba(22,93,255,0.15), 0 4px 12px rgba(255,125,0,0.1), 0 2px 6px rgba(0,0,0,0.05);
    --space-section: 2.4rem;
    --space-card: 1.2rem;
    --space-gap: 1.5rem;
    --transition: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 800;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
body { 
    color: var(--color-text); 
    line-height: var(--body-line-height); 
    background: linear-gradient(180deg, #f8fafc 0%, #eff6ff 60%, #fff7ed 100%);
    min-height: 100vh;
}
h1, h2, h3, h4 { 
    font-weight: var(--heading-weight); 
    text-shadow: 0 1px 2px rgba(22,93,255,0.08);
}
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: linear-gradient(145deg, #ffffff 0%, #f8faff 100%);
    border: 2px solid transparent;
    border-image: linear-gradient(135deg, rgba(22,93,255,0.2), rgba(255,125,0,0.2)) 1 stretch;
}
.btn, button[class*="btn"], a[class*="btn"] { 
    border-radius: var(--radius-md); 
    transition: var(--transition);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: white;
    border: none;
    box-shadow: var(--shadow-sm);
}
a:not([class]) { 
    color: var(--color-primary); 
    transition: var(--transition);
    text-decoration-thickness: 2px;
    text-decoration-color: rgba(255,125,0,0.3);
}
a:not([class]):hover {
    color: var(--color-accent);
    text-decoration-color: var(--color-accent);
}

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

/* news: featured-left */
/* 左大右小 (1大+2小) */
.news-grid { display: grid; grid-template-columns: 2fr 1fr; grid-template-rows: auto auto; gap: var(--space-gap); }
.news-grid > *:first-child { grid-row: span 2; }

/* features: grid-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }

/* hero: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; }

/* testimonials: stacked */
/* 垂直堆叠 */
.testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; }

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }

/* 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; background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%); -webkit-background-clip: text; color: transparent; }

/* cta: card-style */
.cta-inner { 
    background: linear-gradient(135deg, #165DFF 0%, #3672FF 35%, #FF7D00 100%); 
    border-radius: var(--radius-xl); 
    padding: 3rem; 
    text-align: center; 
    color: white;
    box-shadow: 0 12px 48px rgba(22,93,255,0.25), 0 6px 20px rgba(255,125,0,0.2);
}

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
.page-main { max-width: 1200px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { 
    transform: translateY(-6px); 
    box-shadow: 0 12px 40px rgba(22,93,255,0.18), 0 6px 16px rgba(255,125,0,0.12), 0 3px 8px rgba(0,0,0,0.06); 
}
.card { border: 2px solid rgba(var(--rgb-primary), .1); }
header, .header, .navbar { 
    background: linear-gradient(180deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.7) 100%); 
    backdrop-filter: blur(10px);
}
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 24px rgba(var(--rgb-primary), 0.3), 0 3px 10px rgba(var(--rgb-accent), 0.2);
}

/* 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: 2rem; --space-card: 1rem; --space-gap: 1rem; }
    .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; }
}