:root {
    --color-primary: #1f3a8a;
    --color-primary-dark: #0b1226;
    --color-accent: #38bdf8;
    --color-surface: #f6f7fb;
    --color-text: #0b1226;
    --rgb-primary: 31,58,138;
    --rgb-accent: 56,189,248;
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 22px;
    --radius-xl: 30px;
    --shadow-sm: 0 3px 8px rgba(15, 23, 42, 0.08), 0 1px 0 rgba(255, 255, 255, 0.6) inset;
    --shadow-md: 0 4px 8px rgba(0,0,0,0.05), 0 20px 40px -10px rgba(0,0,0,0.12), 0 1px 0 rgba(255,255,255,0.55) inset;
    --shadow-lg: 0 10px 22px rgba(2, 6, 23, 0.12), 0 40px 80px -30px rgba(2, 6, 23, 0.22), 0 1px 0 rgba(255,255,255,0.6) inset;
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.5rem;
    --transition: 0.38s ease;
    --heading-weight: 650;
    --body-line-height: 1.65;

    --color-border: rgba(2, 6, 23, 0.10);
    --color-softline: rgba(2, 6, 23, 0.08);
    --text-shadow-soft: 0 2px 10px rgba(2, 6, 23, 0.08);
    --caret-color: var(--color-accent);
    --accent-color: var(--color-accent);
}

body { color: var(--color-text); line-height: var(--body-line-height); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: var(--text-shadow-soft); }
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: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition), color var(--transition), filter var(--transition); border: 1px solid var(--color-softline); background: linear-gradient(180deg, rgba(255,255,255,0.86), rgba(255,255,255,0.65)); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition), color var(--transition), filter var(--transition); border: 1px solid rgba(2, 6, 23, 0.14); }
a:not([class]) { color: var(--color-primary); transition: color var(--transition), text-shadow var(--transition), filter var(--transition); text-shadow: 0 1px 0 rgba(255,255,255,0.55); }

:focus { outline-color: rgba(56, 189, 248, 0.55); outline-style: solid; }
::selection { background: rgba(56, 189, 248, 0.25); color: var(--color-text); }
body { caret-color: var(--caret-color); accent-color: var(--accent-color); }

/* ========== Section Layout Variants ========== */

/* news: grid-3 */
/* 三列等宽网格 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: baseline; }

/* features: grid-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; align-items: baseline; }

/* hero: split */
/* 左文右图 */
                .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }

/* testimonials: carousel */
/* 单条轮播 */
                .testimonial-list { display: flex; overflow: hidden; } 
                .testimonial-list > * { flex: 0 0 100%; }

/* partners: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 22s linear infinite; }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

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

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; align-items: baseline; }

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

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

/* 条件性装饰 */
.hero, [class*="hero"], section:first-of-type { background: radial-gradient(900px 420px at 12% 18%, rgba(56, 189, 248, 0.22), rgba(56, 189, 248, 0) 60%), radial-gradient(700px 360px at 88% 22%, rgba(99, 102, 241, 0.22), rgba(99, 102, 241, 0) 58%), linear-gradient(135deg, #1f3a8a 0%, #0b1226 52%, #07102a 100%); }
header, .header, .navbar { background: transparent; }

/* 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; --transition: 0.34s ease; }
    .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; }
}