/* CSSVariantEngine v3.0 — variant.css */
/* Palette: violet-teal | Radius: soft | Shadow: layered */
/* Spacing: tight | Transition: smooth-long */
/* Section layouts: {"news":"list-view","features":"grid-2","hero":"minimal","testimonials":"stacked","partners":"grid-4","faq":"two-column","stats":"inline","cta":"full-bg"} */

:root {
    --color-primary: #6d28d9;
    --color-primary-dark: #4c1d95;
    --color-accent: #14b8a6;
    --color-surface: #f3f0fa;
    --color-text: #251b3e;
    --rgb-primary: 109,40,217;
    --rgb-accent: 20,184,166;
    --radius-sm: 6px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --radius-xl: 32px;
    --shadow-sm: 0 1px 2px rgba(37, 27, 62, 0.05), 0 3px 8px -1px rgba(109, 40, 217, 0.06);
    --shadow-md: 0 4px 12px -2px rgba(37, 27, 62, 0.10), 0 18px 36px -14px rgba(109, 40, 217, 0.18);
    --shadow-lg: 0 12px 28px -6px rgba(37, 27, 62, 0.18), 0 28px 60px -18px rgba(20, 184, 166, 0.26);
    --space-section: 2.25rem;
    --space-card: 1.125rem;
    --space-gap: 0.875rem;
    --transition: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.7;
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background:
        radial-gradient(circle at 85% 0%, rgba(var(--rgb-accent), 0.10), transparent 30rem),
        radial-gradient(circle at 10% 0%, rgba(var(--rgb-primary), 0.10), transparent 24rem),
        linear-gradient(180deg, #fbfaff 0%, var(--color-surface) 55%, #e9e3f8 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"] {
    background:
        radial-gradient(circle at 100% 0%, rgba(var(--rgb-accent), 0.10), transparent 14rem),
        linear-gradient(145deg, rgba(255, 255, 255, 0.96) 0%, rgba(247, 244, 253, 0.88) 100%);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--space-card);
    transition: var(--transition);
}
.btn, button[class*="btn"], a[class*="btn"] {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    box-shadow: 0 8px 18px -8px rgba(var(--rgb-primary), 0.55), 0 2px 6px -1px rgba(37, 27, 62, 0.25);
    border-radius: var(--radius-md);
    transition: var(--transition);
}
a:not([class]) {
    color: var(--color-primary);
    text-decoration-color: rgba(var(--rgb-primary), 0.35);
    text-underline-offset: 3px;
    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: grid-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }

/* hero: minimal */
.hero { padding: 2rem 0; }
.hero-content { max-width: 560px; }

/* testimonials: stacked */
/* 垂直堆叠 */
.testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; }

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }

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

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

/* cta: full-bg */
.cta-section {
    background:
        radial-gradient(820px 260px at 85% 0%, rgba(var(--rgb-accent), 0.28), transparent 60%),
        linear-gradient(135deg, #2f1c58 0%, #5b21b6 52%, #0f766e 130%);
    color: #fdf9ff;
    padding: 4rem 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(-4px); box-shadow: var(--shadow-lg); }
.hero, [class*="hero"], section:first-of-type {
    color: #f6f5ff;
    background:
        radial-gradient(1000px 400px at 88% -10%, rgba(var(--rgb-accent), 0.25), transparent 60%),
        radial-gradient(700px 400px at 0% 100%, rgba(var(--rgb-primary), 0.35), transparent 60%),
        linear-gradient(115deg, #2e1a54 0%, #5b21b6 50%, #6d28d9 100%);
}
.card { border-left: 3px solid var(--color-primary); }

/* 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; }
}