:root {
    --color-primary: #2d6cdf;
    --color-primary-dark: #173a7a;
    --color-accent: #27d3a2;
    --color-surface: #f3fbff;
    --color-text: #0f2237;
    --rgb-primary: 45,108,223;
    --rgb-accent: 39,211,162;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 26px;
    --shadow-sm: 0 2px 6px rgba(9, 22, 43, 0.06);
    --shadow-md: 0 4px 10px rgba(9, 22, 43, 0.08), 0 1px 2px rgba(9, 22, 43, 0.05);
    --shadow-lg: 0 6px 18px rgba(9, 22, 43, 0.10), 0 26px 55px -18px rgba(9, 22, 43, 0.22);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 0.38s ease;
    --heading-weight: 650;
    --body-line-height: 1.6;
}

body { color: var(--color-text); line-height: var(--body-line-height); }
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:
        0 4px 8px rgba(0,0,0,0.05),
        0 20px 40px -10px rgba(0,0,0,0.12);
    padding: var(--space-card);
    transition: var(--transition);
    background: linear-gradient(180deg, rgba(255,255,255,0.92), rgba(255,255,255,0.76));
}
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

.card:hover, [class*="card"]:hover {
    transform: translateY(-4px);
    box-shadow:
        0 10px 22px rgba(0,0,0,0.08),
        0 28px 70px -24px rgba(0,0,0,0.18);
}

.hero, [class*="hero"], section:first-of-type {
    background:
        radial-gradient(1200px 600px at 10% 10%, rgba(39,211,162,0.28), rgba(39,211,162,0) 55%),
        radial-gradient(900px 520px at 85% 30%, rgba(45,108,223,0.35), rgba(45,108,223,0) 52%),
        linear-gradient(135deg, #1f6feb, #0f2f63);
    box-shadow:
        0 8px 22px rgba(0,0,0,0.08),
        0 30px 70px -30px rgba(0,0,0,0.20);
}

.card { border-left: 3px solid var(--color-accent); }

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

/* hero: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; }

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

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }

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

/* stats: big-number */
/* 大数字居中 */
                .stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
                .stats-grid .stat-value { font-size: 3rem; }

/* cta: card-style */
.cta-inner {
    background:
        radial-gradient(900px 420px at 20% 20%, rgba(39,211,162,0.22), rgba(39,211,162,0) 55%),
        linear-gradient(180deg, rgba(243,251,255,0.96), rgba(243,251,255,0.78));
    border-radius: var(--radius-xl);
    padding: 3rem;
    text-align: center;
    box-shadow:
        0 4px 10px rgba(9, 22, 43, 0.08),
        0 22px 50px -18px rgba(9, 22, 43, 0.20);
}

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

/* 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; }
}