:root {
    --color-primary: #6d28d9;
    --color-primary-dark: #4c1d95;
    --color-accent: #22d3ee;
    --color-surface: #f1f6fc;
    --color-text: #14162b;
    --rgb-primary: 109,40,217;
    --rgb-accent: 34,211,238;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --shadow-sm: 0 1px 2px rgba(20,22,43,.08), 0 0 10px rgba(34,211,238,.16);
    --shadow-md: 0 8px 20px rgba(20,22,43,.10), 0 0 24px rgba(34,211,238,.28);
    --shadow-lg: 0 18px 40px rgba(20,22,43,.18), 0 0 32px rgba(34,211,238,.42);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 0.28s cubic-bezier(.25,.8,.35,1);
    --heading-weight: 700;
    --body-line-height: 1.6;
}

@keyframes glowPulse {
    0%, 100% { box-shadow: 0 4px 14px rgba(20,22,43,.14), 0 0 4px rgba(34,211,238,.10); }
    50% { box-shadow: 0 8px 24px rgba(20,22,43,.20), 0 0 26px rgba(34,211,238,.48); }
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background-color: #ffffff;
    background-image: repeating-linear-gradient(180deg, #ffffff 0 140px, #eef4fb 140px 280px);
    caret-color: var(--color-accent);
    accent-color: var(--color-primary);
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: #14162b; text-shadow: 0 1px 0 rgba(255,255,255,.7), 0 0 18px rgba(34,211,238,.22); }
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), inset 0 0 0 1px rgba(34,211,238,.24);
    padding: var(--space-card);
    transition: var(--transition);
    background-color: #ffffff;
    background-image: linear-gradient(160deg, #ffffff 0%, #f3f9ff 58%, #e8f6fd 100%);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    color: #ffffff;
    background-image: linear-gradient(135deg, #6d28d9 0%, #3b5bdb 55%, #22d3ee 100%);
    box-shadow: 0 6px 18px rgba(109,40,217,.38), 0 0 22px rgba(34,211,238,.38);
    outline-color: var(--color-accent);
    animation: glowPulse 5.5s ease-in-out infinite;
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-shadow: 0 0 12px rgba(34,211,238,.32); }

/* ========== 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: grid-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }

/* hero: left-aligned */
.hero-content { text-align: left; max-width: 600px; }

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
                .testimonial-list > * { break-inside: avoid; margin-bottom: 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: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; color: #14162b; }

/* cta: split */
.cta-inner {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 2rem;
    border-radius: var(--radius-xl);
    background-image: linear-gradient(120deg, rgba(109,40,217,.10) 0%, rgba(34,211,238,.14) 100%);
    box-shadow: inset 0 0 0 1px rgba(34,211,238,.30), 0 0 30px rgba(34,211,238,.22);
}

/* 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-shadow: 0 0 18px rgba(34,211,238,.70); }
header, .header, .navbar { background: transparent; box-shadow: 0 10px 28px -22px rgba(20,22,43,.65); }

/* 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; }
}