:root {
    --color-primary: #2f7aa6;
    --color-primary-dark: #1f4f6b;
    --color-accent: #ff3d81;
    --color-surface: #f3f7ff;
    --color-text: #0b1624;
    --rgb-primary: 47,122,166;
    --rgb-accent: 255,61,129;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 26px;
    --shadow-sm: 0 1px 0 rgba(11,22,36,.25), 0 8px 20px rgba(47,122,166,.08);
    --shadow-md: 0 10px 24px rgba(11,22,36,.10), 0 2px 6px rgba(11,22,36,.08), 0 0 0 1px rgba(47,122,166,.10);
    --shadow-lg: 0 18px 46px rgba(11,22,36,.14), 0 8px 18px rgba(11,22,36,.10), 0 0 0 1px rgba(255,61,129,.10);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 260ms cubic-bezier(.2,.9,.2,1);
    --heading-weight: 800;
    --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 10px 26px rgba(11,22,36,.14),
        0 3px 10px rgba(11,22,36,.10),
        0 0 0 1px rgba(47,122,166,.14),
        0 0 0 0 rgba(255,61,129,0);
    padding: var(--space-card);
    transition: var(--transition);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow:
        0 10px 24px rgba(11,22,36,.10),
        0 0 0 1px rgba(47,122,166,.20);
}
a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-shadow: 0 0 0 rgba(0,0,0,0);
}

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

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

/* partners: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 20s linear infinite; }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }

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

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }

/* 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:
        radial-gradient(1100px 420px at 14% 20%, rgba(255,61,129,.18) 0%, rgba(255,61,129,0) 55%),
        radial-gradient(900px 320px at 86% 26%, rgba(47,122,166,.22) 0%, rgba(47,122,166,0) 58%),
        linear-gradient(135deg, #263445 0%, #1a2534 40%, #101a28 100%);
    border-radius: var(--radius-xl);
    box-shadow:
        0 18px 56px rgba(11,22,36,.22),
        0 0 0 1px rgba(255,61,129,.10);
}
.card { border-left: 3px solid var(--color-primary); }
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; }
    .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; }
}