/* CSSVariantEngine v3.0 — jiaoqiushujuwang.sh.cn */
/* Palette: sidebar-classic | Radius: soft | Shadow: multi-layer gradient */
/* Spacing: balanced | Transition: smooth long */
/* Section layouts: {"news":"list-view","features":"horizontal","hero":"overlay","testimonials":"grid-3","partners":"centered","faq":"with-sidebar","stats":"inline","cta":"centered"} */

:root {
    --color-primary: #252e3a;
    --color-primary-dark: #1a2129;
    --color-accent: #10b981;
    --color-surface: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    --color-text: #1e293b;
    --rgb-primary: 37, 46, 58;
    --rgb-accent: 16, 185, 129;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 22px;
    --shadow-sm: 0 1px 3px rgba(var(--rgb-primary), 0.07), 0 4px 6px rgba(var(--rgb-accent), 0.05);
    --shadow-md: 0 4px 12px rgba(var(--rgb-primary), 0.1), 0 8px 24px rgba(var(--rgb-accent), 0.07);
    --shadow-lg: 0 8px 24px rgba(var(--rgb-primary), 0.12), 0 16px 48px rgba(var(--rgb-accent), 0.1);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 0.55s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --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, #f8fafc 0%, #e2e8f0 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: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
}
.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: 0;
}
a:not([class]) { 
    color: var(--color-accent); 
    transition: var(--transition); 
}

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

/* news: list-view */
/* 列表模式 (图左文右) */
                .news-grid { display: flex; flex-direction: column; gap: var(--space-gap); }
                .news-grid .card { display: grid; grid-template-columns: 280px 1fr; }

/* 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: overlay */
/* 全屏背景+文字覆盖 */
                .hero { 
                    position: relative; 
                    min-height: 70vh; 
                    display: flex; 
                    align-items: center; 
                    background: linear-gradient(135deg, var(--color-primary) 0%, #2f3e4f 50%, #38bdf8 100%);
                }
                .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: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }

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

/* stats: inline */
/* 水平排列 */
                .stats-grid { display: flex; justify-content: center; gap: 3rem; }

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }

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

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { 
    transform: translateY(-4px); 
    box-shadow: var(--shadow-lg);
    filter: brightness(1.03);
}
.card { 
    border-left: 3px solid;
    border-image: linear-gradient(180deg, var(--color-primary) 0%, var(--color-accent) 100%) 1;
}
header, .header, .navbar { 
    background: linear-gradient(90deg, var(--color-primary) 0%, #2f3e4f 100%); 
    backdrop-filter: blur(8px);
}

/* 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; }
}