/* CSSVariantEngine v3.0 — zh-c7online.org.cn */
/* Palette: bold-contrast | Radius: micro | Shadow: subtle */
/* Spacing: compact | Transition: snappy */
/* Section layouts: {"news":"list-view","features":"horizontal","hero":"centered","testimonials":"stacked","partners":"scroll","faq":"two-column","stats":"big-number","cta":"card-style"} */

:root {
    --color-primary: #0ea5e9;
    --color-primary-dark: #0369a1;
    --color-accent: #f59e0b;
    --color-surface: #fef3c7;
    --color-text: #1e293b;
    --rgb-primary: 14,165,233;
    --rgb-accent: 245,158,11;
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 5px;
    --radius-xl: 6px;
    --shadow-sm: 0 1px 2px rgba(15,23,42,.08);
    --shadow-md: 0 3px 6px rgba(15,23,42,.1);
    --shadow-lg: 0 6px 12px rgba(15,23,42,.12);
    --space-section: 3rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 0.2s ease-out;
    --heading-weight: 700;
    --body-line-height: 1.65;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background-color: #f1f5f9; }
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-sm); padding: var(--space-card); transition: var(--transition); background-color: #ffffff; border: 1px solid #cbd5e1; }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background-color: var(--color-primary); color: white; border: 1px solid var(--color-primary-dark); }
a:not([class]) { color: var(--color-primary); 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; background-color: #eff6ff; border: 1px solid #93c5fd; }

/* 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; }
.testimonial-list .card { background-color: #fef3c7; border-color: #fdba74; }

/* partners: scroll */
/* 自动滚动 */
.partner-grid { display: flex; gap: 1rem; overflow: hidden; animation: partnerScroll 16s linear infinite; }
.partner-grid > * { background-color: #f8fafc; padding: 8px 12px; border: 1px solid #e2e8f0; border-radius: var(--radius-sm); }
@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); }
.faq-list .card { background-color: #ecfdf5; border-color: #6ee7b7; }

/* stats: big-number */
/* 大数字居中 */
.stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; }
.stats-grid .stat-value { font-size: 3rem; color: var(--color-primary-dark); }

/* cta: card-style */
.cta-inner { background: linear-gradient(135deg, #0ea5e9, #f59e0b); border-radius: var(--radius-xl); padding: 2rem; text-align: center; color: white; }

/* 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(-2px); box-shadow: var(--shadow-md); }
a:not([class]):hover { color: var(--color-accent); }
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(135deg, #020617, #1e293b); color: white; }
.card { border-left: 3px solid var(--color-accent); }
header, .header, .navbar { background: #0f172a; color: white; border-bottom: 1px solid #334155; }

/* 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: 0.8rem; --space-gap: 0.6rem; }
    .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; }
}