/* CSSVariantEngine v3.0 — hbnuosheng.com */
/* Palette: mint-glow | Radius: soft-rounded | Shadow: luminous-glow */
/* Spacing: airy | Transition: smooth-spring */
/* Section layouts: {"news":"list-view","features":"grid-2","hero":"overlay","testimonials":"carousel","partners":"centered","faq":"single-column","stats":"inline","cta":"split"} */

@keyframes subtlePulse {
    0%, 100% { box-shadow: 0 4px 12px rgba(30,41,59,.1), 0 0 18px rgba(54,211,153,0.15); }
    50% { box-shadow: 0 4px 12px rgba(30,41,59,.1), 0 0 26px rgba(54,211,153,0.3); }
}

:root {
    --color-primary: #165DFF;
    --color-primary-dark: #0e42c2;
    --color-accent: #36d399;
    --color-surface: #f7fafc;
    --color-text: #1e293b;
    --rgb-primary: 22,93,255;
    --rgb-accent: 54,211,153;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --shadow-sm: 0 1px 3px rgba(30,41,59,.08), 0 0 8px rgba(54,211,153,0.08);
    --shadow-md: 0 4px 12px rgba(30,41,59,.1), 0 0 22px rgba(54,211,153,0.2);
    --shadow-lg: 0 14px 30px rgba(30,41,59,.12), 0 0 36px rgba(54,211,153,0.4);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    --heading-weight: 700;
    --body-line-height: 1.7;
    caret-color: var(--color-accent);
    accent-color: var(--color-accent);
}

/* 基础覆盖 */
body { 
    color: var(--color-text); 
    line-height: var(--body-line-height); 
    background-color: #f0f4f8;
}
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-color: #ffffff;
    border-top: 4px solid var(--color-accent);
    animation: subtlePulse 3.5s ease-in-out infinite;
}
.btn, button[class*="btn"], a[class*="btn"] { 
    border-radius: var(--radius-md); 
    transition: var(--transition); 
    background-color: var(--color-primary);
    color: white;
    border: 2px solid var(--color-primary-dark);
    box-shadow: 0 0 16px rgba(var(--rgb-primary), 0.25);
}
a:not([class]) { 
    color: var(--color-primary); 
    transition: var(--transition); 
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
}

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

/* 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, #eff6ff 0%, #ecfdf5 100%);
}
.hero-content { position: relative; z-index: 1; }

/* testimonials: carousel */
/* 单条轮播 */
.testimonial-list { display: flex; overflow: hidden; } 
.testimonial-list > * { flex: 0 0 100%; }

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

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }

/* 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(-6px) scale(1.02); 
    box-shadow: 0 18px 40px rgba(30,41,59,.15), 0 0 42px rgba(var(--rgb-accent), 0.6); 
    border-top-color: var(--color-primary);
}
a:not([class]):hover { 
    color: var(--color-accent); 
    text-shadow: 0 0 8px rgba(var(--rgb-accent), 0.4);
}
header, .header, .navbar { 
    background: rgba(255,255,255,0.85); 
    backdrop-filter: blur(12px); 
    border-bottom: 1px solid rgba(var(--rgb-accent), 0.15);
}

/* 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; }
}