:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1e3a8a;
    --color-accent: #7dd3fc;
    --color-surface: #fefce8;
    --color-text: #1f2937;
    --rgb-primary: 37,99,235;
    --rgb-accent: 125,211,252;
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 26px;
    --radius-xl: 38px;
    --shadow-sm: 0 1px 0 rgba(15, 23, 42, .06), 0 6px 18px rgba(37, 99, 235, .08);
    --shadow-md: 0 10px 26px rgba(2, 6, 23, .10), 0 3px 10px rgba(37, 99, 235, .10), 0 1px 0 rgba(255,255,255,.35) inset;
    --shadow-lg: 0 18px 42px rgba(2, 6, 23, .14), 0 6px 18px rgba(37, 99, 235, .14), 0 1px 0 rgba(255,255,255,.42) inset;
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 0.5s cubic-bezier(.2,.85,.25,1);
    --heading-weight: 700;
    --body-line-height: 1.65;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: radial-gradient(900px 380px at 10% 0%, rgba(37,99,235,.14) 0%, rgba(37,99,235,0) 55%), radial-gradient(820px 360px at 90% 10%, rgba(125,211,252,.18) 0%, rgba(125,211,252,0) 55%), linear-gradient(180deg, rgba(254,252,232,1) 0%, rgba(255,255,255,1) 40%, rgba(248,250,252,1) 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"] { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); }
.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); text-shadow: 0 1px 0 rgba(255,255,255,.55); }

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

/* 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: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }

/* Page Layout: wide */
/* 超宽 */
            .page-main { max-width: 1400px; margin: 0 auto; }

/* 条件性装饰 */
.hero, [class*="hero"], section:first-of-type { 
    background:
      linear-gradient(90deg, rgba(37,99,235,.95) 0%, rgba(30,58,138,.95) 32%, rgba(125,211,252,.92) 70%, rgba(254,252,232,.92) 100%);
    background-image:
      linear-gradient(135deg, rgba(37,99,235,1) 0%, rgba(30,58,138,1) 38%, rgba(125,211,252,1) 78%, rgba(254,252,232,1) 110%),
      radial-gradient(900px 320px at 10% 20%, rgba(125,211,252,.35) 0%, rgba(125,211,252,0) 55%),
      radial-gradient(720px 280px at 92% 0%, rgba(254,252,232,.35) 0%, rgba(254,252,232,0) 60%);
    border-top: 1px solid rgba(37,99,235,.18);
    border-bottom: 1px solid rgba(125,211,252,.18);
}
.card { border-left: 3px solid var(--color-primary); box-shadow: var(--shadow-md); }
header, .header, .navbar { box-shadow: 0 16px 40px rgba(2, 6, 23, .12), 0 3px 12px rgba(37, 99, 235, .12), 0 1px 0 rgba(255,255,255,.45) inset; }

/* 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; --radius-sm: 10px; --radius-md: 16px; --radius-lg: 22px; --radius-xl: 30px; --shadow-md: 0 12px 30px rgba(2, 6, 23, .12), 0 3px 10px rgba(37, 99, 235, .10), 0 1px 0 rgba(255,255,255,.40) inset; }
    .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; }
}