/* CSSVariantEngine v3.0 — kaiyun-praenomen.com.cn */
/* Palette: sidebar-classic | Radius: moderate | Shadow: glow */
/* Spacing: comfortable | Transition: smooth-glow */
/* Section layouts: {"news":"grid-3","features":"centered","hero":"split","testimonials":"grid-3","partners":"scroll","faq":"two-column","stats":"big-number","cta":"card-style"} */

:root {
    --color-primary: #3b82c4;
    --color-primary-dark: #1e3a5f;
    --color-accent: #5ec4ff;
    --color-surface: #252e3a;
    --color-text: #d8e4f0;
    --rgb-primary: 59,130,196;
    --rgb-accent: 94,196,255;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --shadow-sm: 0 0 8px rgba(94,196,255,.18), 0 1px 3px rgba(0,0,0,.35);
    --shadow-md: 0 0 16px rgba(94,196,255,.25), 0 4px 8px rgba(0,0,0,.4);
    --shadow-lg: 0 0 28px rgba(94,196,255,.4), 0 8px 20px rgba(0,0,0,.45);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --heading-weight: 800;
    --body-line-height: 1.7;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: #1a212b; }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: #eaf2fa; text-shadow: 0 0 18px rgba(94,196,255,.25); }
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: #2c3644; }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); box-shadow: 0 0 12px rgba(94,196,255,.3); }
a:not([class]) { color: var(--color-accent); transition: var(--transition); }

/* ========== 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: centered */
/* 居中大卡片 */
                .feature-list { display: flex; flex-direction: column; align-items: center; gap: calc(var(--space-gap) * 2); max-width: 720px; margin: 0 auto; }

/* hero: split */
/* 左文右图 */
                .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }

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

/* partners: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 20s linear infinite; }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }

/* 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; color: var(--color-accent); text-shadow: 0 0 24px rgba(94,196,255,.5); }

/* cta: card-style */
.cta-inner { background: linear-gradient(135deg, #252e3a 0%, #2f3d4f 100%); border-radius: var(--radius-xl); padding: 3rem; text-align: center; box-shadow: 0 0 32px rgba(94,196,255,.3), inset 0 0 24px rgba(94,196,255,.08); }

/* 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: 0 0 32px rgba(94,196,255,.6), 0 10px 24px rgba(0,0,0,.5); }
.card { border: 1px solid rgba(var(--rgb-accent), .15); }
header, .header, .navbar { background: transparent; }

/* 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; }
}