/* CSSVariantEngine v3.0 — zhangqudianjing.org.cn */
/* Palette: deep-purple gold | Radius: soft rounded | Shadow: multi-layer gradient */
/* Spacing: spacious | Transition: smooth long */
/* Section layouts: {"news":"featured-left","features":"horizontal","hero":"centered","testimonials":"stacked","partners":"grid-4","faq":"single-column","stats":"grid-3","cta":"full-bg"} */

:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #4c1d95;
    --color-accent: #f59e0b;
    --color-surface: linear-gradient(135deg, #ffffff 0%, #f8fafc 50%, #f0f4ff 100%);
    --color-text: #0f172a;
    --rgb-primary: 124,58,237;
    --rgb-accent: 245,158,11;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 32px;
    --shadow-sm: 0 4px 12px rgba(var(--rgb-primary), 0.08), 0 1px 3px rgba(0,0,0,0.05);
    --shadow-md: 0 12px 28px rgba(var(--rgb-primary), 0.12), 0 4px 8px rgba(var(--rgb-accent), 0.06);
    --shadow-lg: 0 24px 60px rgba(var(--rgb-primary), 0.18), 0 8px 20px rgba(var(--rgb-accent), 0.1);
    --space-section: 4.5rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 600;
    --body-line-height: 1.7;
}

/* 基础覆盖 */
body { 
    background: radial-gradient(ellipse at 50% 0%, #1e1b4b 0%, #0f0f1a 60%, #070710 100%);
    color: var(--color-text); 
    line-height: var(--body-line-height); 
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section { 
    padding-top: var(--space-section); 
    padding-bottom: var(--space-section); 
}
.card, [class*="card"] { 
    background: var(--color-surface);
    border: 2px solid transparent;
    border-image: linear-gradient(135deg, rgba(var(--rgb-primary), 0.2) 0%, rgba(var(--rgb-accent), 0.2) 100%) 1;
    border-radius: var(--radius-lg); 
    box-shadow: var(--shadow-md); 
    padding: var(--space-card); 
    transition: var(--transition); 
}
.btn, button[class*="btn"], a[class*="btn"] { 
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 50%, var(--color-primary) 100%);
    background-size: 200% 100%;
    color: white;
    border-radius: var(--radius-md); 
    transition: var(--transition); 
}
a:not([class]) { 
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent; 
    transition: var(--transition); 
}

/* ========== 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: horizontal */
/* 水平滚动 */
                .feature-list { display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; }
                .feature-list > * { flex: 0 0 300px; scroll-snap-align: start; }

/* 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: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }

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

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: full-bg */
.cta-section { 
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 30%, var(--color-accent) 70%, var(--color-primary-dark) 100%); 
    color: #fff; 
    padding: 4rem 2rem; 
}

/* Page Layout: narrow-centered */
/* 窄版居中 */
            .page-main { max-width: 860px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { 
    transform: translateY(-6px); 
    box-shadow: var(--shadow-lg); 
    border-image: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%) 1;
}
header, .header, .navbar { 
    background: linear-gradient(to bottom, rgba(15,15,26,0.92), rgba(15,15,26,0.7)); 
    backdrop-filter: blur(12px);
}

/* 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: 0.75rem; }
    .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; }
}