/* CSSVariantEngine v3.0 — yunwandianjing.org.cn */
/* Palette: sidebar-classic | Radius: generous | Shadow: multi-layer gradient */
/* Spacing: spacious | Transition: long smooth */
/* Section layouts: {"news":"grid-3","features":"grid-3","hero":"overlay","testimonials":"grid-3","partners":"grid-4","faq":"with-sidebar","stats":"grid-3","cta":"card-style"} */

:root {
    --color-primary: #3a86ff;
    --color-primary-dark: #1e57b3;
    --color-accent: #38b000;
    --color-surface: #f8fafc;
    --color-text: #1e293b;
    --rgb-primary: 58, 134, 255;
    --rgb-accent: 56, 176, 0;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 10px rgba(37, 46, 58, 0.1);
    --shadow-md: 0 7px 22px rgba(37, 46, 58, 0.17);
    --shadow-lg: 0 14px 36px rgba(37, 46, 58, 0.24), 0 4px 12px rgba(var(--rgb-accent), 0.12);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.75rem;
    --transition: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 800;
    --body-line-height: 1.65;
}

/* 基础覆盖 */
body { 
    background: linear-gradient(145deg, #f8fafc 0%, #e2e8f0 100%);
    color: var(--color-text); 
    line-height: var(--body-line-height); 
    caret-color: var(--color-primary);
    accent-color: var(--color-accent);
}
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: linear-gradient(180deg, #ffffff 0%, #f1f5f9 100%);
    border-radius: var(--radius-lg); 
    box-shadow: var(--shadow-md); 
    padding: var(--space-card); 
    transition: var(--transition);
    border: 1px solid;
    border-image: linear-gradient(135deg, rgba(var(--rgb-primary), 0.2), rgba(37,46,58,0.15), rgba(var(--rgb-accent), 0.2)) 1;
}
.btn, button[class*="btn"], a[class*="btn"] { 
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #ffffff;
    border-radius: var(--radius-md); 
    transition: var(--transition);
    border: 1px solid transparent;
    border-image: linear-gradient(90deg, var(--color-accent), var(--color-primary)) 1;
}
a:not([class]) { 
    color: var(--color-primary); 
    transition: var(--transition); 
    text-shadow: 0 0 1px rgba(var(--rgb-primary), 0.1);
}

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

/* news: grid-3 */
/* 三列等宽网格 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

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

/* hero: overlay */
/* 全屏背景+文字覆盖 */
                .hero { 
                    background: linear-gradient(120deg, rgba(37, 46, 58, 0.92) 0%, rgba(var(--rgb-primary), 0.65) 100%);
                    position: relative; 
                    min-height: 70vh; 
                    display: flex; 
                    align-items: center; 
                }
                .hero-content { position: relative; z-index: 1; }

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

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

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }
                .faq-wrapper > *:last-child {
                    background: linear-gradient(180deg, #252e3a 0%, #1a202c 100%);
                    color: #f8fafc;
                    border-radius: var(--radius-lg);
                    box-shadow: var(--shadow-md);
                }

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

/* cta: card-style */
.cta-inner { 
    background: linear-gradient(135deg, #252e3a 0%, #334155 48%, #1e293b 100%);
    border-radius: var(--radius-xl); 
    padding: 3rem; 
    text-align: center; 
    color: #ffffff;
    border: 1px solid;
    border-image: linear-gradient(90deg, var(--color-primary), var(--color-accent), #ffca3a) 1 stretch;
    box-shadow: 0 8px 32px rgba(37,46,58,0.3);
}

/* 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: var(--shadow-lg); 
    border-image: linear-gradient(135deg, var(--color-primary), #252e3a, var(--color-accent)) 1;
    filter: saturate(1.05);
}
a:not([class]):hover { 
    color: var(--color-accent); 
    text-shadow: 0 0 4px rgba(var(--rgb-accent), 0.3);
}
.card { border: 1px solid rgba(var(--rgb-primary), .08); }

/* 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; }
}