/* CSSVariantEngine v3.0 — zh-wendingyule.net.cn */
/* Palette: indigo-tangerine | Radius: soft rounded | Shadow: layered dual-tone */
/* Spacing: bold contrast | Transition: smooth long gradient-rich */
/* Section layouts: {"news":"featured-top","features":"grid-4","hero":"minimal","testimonials":"grid-3","partners":"scroll","faq":"single-column","stats":"grid-3","cta":"card-style"} */

:root {
    --color-primary: #6366f1;
    --color-primary-dark: #4338ca;
    --color-accent: #f97316;
    --color-surface: linear-gradient(135deg, #fdf4ff 0%, #f5f3ff 100%);
    --color-text: #1e1b4b;
    --rgb-primary: 99, 102, 241;
    --rgb-accent: 249, 115, 22;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 4px 8px rgba(99,102,241,0.15), 0 1px 3px rgba(249,115,22,0.08);
    --shadow-md: 0 12px 24px rgba(99,102,241,0.2), 0 4px 12px rgba(249,115,22,0.12);
    --shadow-lg: 0 28px 56px rgba(99,102,241,0.25), 0 12px 32px rgba(249,115,22,0.18), 0 2px 8px rgba(0,0,0,0.06);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 800;
    --body-line-height: 1.7;
}

/* 基础覆盖 */
body { 
    color: var(--color-text); 
    line-height: var(--body-line-height); 
    background: linear-gradient(180deg, #ffffff 0%, #f0e7ff 100%);
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section { 
    padding-top: var(--space-section); 
    padding-bottom: var(--space-section); 
    background: linear-gradient(180deg, rgba(255,255,255,0.6) 0%, rgba(245,243,255,0.8) 100%);
}
.card, [class*="card"] { 
    border-radius: var(--radius-lg); 
    box-shadow: var(--shadow-md); 
    padding: var(--space-card); 
    transition: var(--transition);
    background: linear-gradient(180deg, #ffffff 0%, #faf5ff 100%);
}
.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}
.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: 2px solid transparent;
    border-image: linear-gradient(135deg, var(--color-primary), var(--color-accent)) 1;
}
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary) 100%);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

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

/* news: featured-top */
/* 首篇横跨全宽 */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
.news-grid > *:first-child { grid-column: span 3; background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #f97316 100%); color: white; }

/* features: grid-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }

/* hero: minimal */
.hero { padding: 2rem 0; background: linear-gradient(120deg, #eef2ff 0%, #fdf4ff 100%); } 
.hero-content { max-width: 560px; }

/* 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 26s ease-in-out infinite; }
@keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }
.stats-grid > div {
    background: linear-gradient(180deg, #f5f3ff 0%, #ffffff 100%);
    border-radius: var(--radius-md);
    padding: 1.25rem;
}

/* cta: card-style */
.cta-inner { 
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 40%, var(--color-accent) 100%); 
    border-radius: var(--radius-xl); 
    padding: 3rem; 
    text-align: center;
    color: white;
    box-shadow: var(--shadow-lg);
}

/* Page Layout: narrow-centered */
/* 窄版居中 */
.page-main { max-width: 860px; margin: 0 auto; }

/* 条件性装饰 */
a:not([class]):hover { color: var(--color-accent); text-decoration-thickness: 3px; }
.card { 
    border-left: 4px solid;
    border-image: linear-gradient(180deg, var(--color-primary) 0%, var(--color-accent) 100%) 1;
}

/* 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; }
}