:root {
    --color-primary: #0f3d66;
    --color-primary-dark: #072840;
    --color-accent: #2dd4bf;
    --color-surface: #f2fbff;
    --color-text: #0b1220;

    --rgb-primary: 15,61,102;
    --rgb-accent: 45,212,191;

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

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

    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;

    --transition: 220ms cubic-bezier(0.2, 0.9, 0.2, 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: var(--color-surface); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: none; }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: none; padding: var(--space-card); transition: var(--transition); background: #ffffff; border: 1px solid rgba(var(--rgb-primary), .14); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); border: 1px solid rgba(var(--rgb-primary), .18); background: #ffffff; color: var(--color-primary); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration: none; }
a:not([class]):hover { color: var(--color-primary-dark); }

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

/* news: list-view */
/* 列表模式 (图左文右) */
                .news-grid { display: flex; flex-direction: column; gap: var(--space-gap); }
                .news-grid .card { display: grid; grid-template-columns: 280px 1fr; border-color: rgba(var(--rgb-primary), .16); background: #ffffff; }

/* features: grid-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }
.feature-list .card { background: #ffffff; border: 1px solid rgba(var(--rgb-primary), .14); }

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

/* testimonials: stacked */
/* 垂直堆叠 */
                .testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; }
                .testimonial-list .card { background: #ffffff; border: 1px solid rgba(var(--rgb-primary), .14); }

/* partners: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 24s 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); }
.faq-list .card { background: #ffffff; border: 1px solid rgba(var(--rgb-primary), .14); }

/* stats: inline */
/* 水平排列 */
                .stats-grid { display: flex; justify-content: center; gap: 3rem; }
                .stats-grid .card { background: #ffffff; border: 1px solid rgba(var(--rgb-primary), .14); }

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }
.cta-inner .card { background: #ffffff; border: 1px solid rgba(var(--rgb-accent), .38); }

/* 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: #0b2840; }
.hero { color: #eaf6ff; }
.hero h1, .hero h2, .hero h3, .hero h4 { color: #ffffff; }
.hero p { color: rgba(234, 246, 255, .92); }

.card { border: 1px solid rgba(var(--rgb-primary), .14); }
header, .header, .navbar { background: transparent; border-color: transparent; }

header a, .header a, .navbar a { color: var(--color-primary); }
header a:hover, .header a:hover, .navbar a:hover { color: var(--color-accent); }

/* 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; }
}