:root {
    --color-primary: #4338ca;
    --color-primary-dark: #312e81;
    --color-accent: #f472b6;
    --color-surface: #f6f4ff;
    --color-text: #1e1b4b;
    --rgb-primary: 67,56,202;
    --rgb-accent: 244,114,182;
    --gradient-surface: linear-gradient(155deg, #ffffff 0%, #f6f4ff 44%, #fdf2f8 100%);
    --gradient-brand: linear-gradient(118deg, #312e81 0%, #4338ca 38%, #7c3aed 68%, #db2777 100%);
    --gradient-edge: linear-gradient(135deg, rgba(67,56,202,.55) 0%, rgba(124,58,237,.30) 50%, rgba(244,114,182,.55) 100%);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 1px 2px rgba(49,46,129,.10), 0 3px 8px -2px rgba(67,56,202,.10);
    --shadow-md: 0 6px 14px -5px rgba(49,46,129,.22), 0 14px 30px -10px rgba(124,58,237,.18);
    --shadow-lg: 0 18px 34px -12px rgba(49,46,129,.32), 0 34px 60px -22px rgba(244,114,182,.26);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 0.45s cubic-bezier(0.22, 0.61, 0.36, 1);
    --transition-slow: 0.6s cubic-bezier(0.33, 0.05, 0.28, 0.98);
    --heading-weight: 600;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
body { background: linear-gradient(180deg, #fbfaff 0%, #f6f4ff 42%, #fdf2f8 100%); color: var(--color-text); line-height: var(--body-line-height); accent-color: #7c3aed; }
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: var(--gradient-surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-md), inset 0 0 0 1px rgba(124,58,237,.10); padding: var(--space-card); transition: var(--transition); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); border-color: rgba(124,58,237,.35); box-shadow: var(--shadow-sm), inset 0 0 0 1px rgba(255,255,255,.35); transition: var(--transition); }
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; }

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

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

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }

/* 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: full-bg */
.cta-section { background: linear-gradient(122deg, #312e81 0%, #4338ca 36%, #7c3aed 66%, #db2777 100%); color: #ffffff; padding: 4rem 2rem; box-shadow: inset 0 1px 0 rgba(255,255,255,.22), inset 0 -1px 0 rgba(30,27,75,.35); }

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

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg), inset 0 0 0 1px rgba(244,114,182,.28); }

/* 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; }
}