:root {
    --color-primary: #12324a;
    --color-primary-dark: #081a27;
    --color-accent: #22c55e;
    --color-surface: #fff7e6;
    --color-text: #0b1220;

    --rgb-primary: 18,50,74;
    --rgb-accent: 34,197,94;

    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 6px;
    --radius-xl: 0px;

    --shadow-sm: none;
    --shadow-md: none;
    --shadow-lg: none;

    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;

    --transition: 160ms cubic-bezier(.2,.9,.2,1);
    --heading-weight: 700;
    --body-line-height: 1.7;

    --strip-cream: #fff3d6;
    --strip-white: #ffffff;
    --strip-dark: #0e2233;
    --strip-border: rgba(18, 50, 74, .18);
    --strip-border-strong: rgba(18, 50, 74, .28);
    --strip-text-muted: rgba(11, 18, 32, .78);
}

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: 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); }

body { background: var(--strip-white); }
:focus-visible { outline: 2px solid rgba(var(--rgb-accent), .55); outline-offset: 2px; }

.card, [class*="card"] { border: 1px solid rgba(var(--rgb-primary), .16); }
.card:hover, [class*="card"]:hover { transform: translateY(-2px); box-shadow: none; }
a:not([class]):hover { color: var(--color-accent); }

:root { caret-color: var(--color-accent); accent-color: var(--color-accent); }

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

/* news: masonry-2 */
/* 两列瀑布流 */
                .news-grid { column-count: 2; column-gap: var(--space-gap); }
                .news-grid .card { break-inside: avoid; margin-bottom: var(--space-gap); }

/* features: horizontal */
/* 水平滚动 */
                .feature-list { display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; }
                .feature-list > * { flex: 0 0 300px; scroll-snap-align: start; }

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

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
                .testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); 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: inline */
/* 水平排列 */
                .stats-grid { display: flex; justify-content: center; gap: 3rem; }

/* cta: full-bg */
.cta-section { background: var(--color-primary-dark); color: #ffffff; padding: 4rem 2rem; }
.cta-section { border-top: 1px solid var(--strip-border-strong); border-bottom: 1px solid var(--strip-border-strong); }

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
            .page-main { max-width: 1200px; margin: 0 auto; }

/* Strip-style color zones (horizontal-strips) */
section, .section { background: transparent; }
section:nth-of-type(odd), .section:nth-of-type(odd) { background: var(--strip-white); }
section:nth-of-type(even), .section:nth-of-type(even) { background: var(--strip-cream); }

.hero-inner, .feature-list, .testimonial-list, .news-grid, .faq-wrapper, .stats-grid, .partner-grid { background: transparent; }

/* Strong dark zone for CTA and following content blocks */
.cta-section, .cta-section + section, .cta-section + .section { background: var(--strip-dark); color: #ffffff; }
.cta-section .card, .cta-section [class*="card"] { border-color: rgba(255,255,255,.18); background: rgba(255,255,255,.04); }

/* 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; }
}