:root {
    --color-primary: #f5c518;
    --color-primary-dark: #d4a017;
    --color-accent: #e63946;
    --color-surface: #1a1a2e;
    --color-text: #ffffff;
    --rgb-primary: 245,197,24;
    --rgb-accent: 230,57,70;
    --radius-sm: 2px;
    --radius-md: 3px;
    --radius-lg: 4px;
    --radius-xl: 4px;
    --shadow-sm: 3px 3px 0px rgba(245,197,24,.35);
    --shadow-md: 4px 4px 0px rgba(245,197,24,.45);
    --shadow-lg: 6px 6px 0px rgba(245,197,24,.55);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.15s cubic-bezier(.4,0,.2,1);
    --heading-weight: 800;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background-color: #0f0f1a; }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: #ffffff; }
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); background-color: #1a1a2e; border: 2px solid rgba(245,197,24,.6); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background-color: #f5c518; color: #0f0f1a; border: 2px solid #f5c518; box-shadow: 3px 3px 0px #e63946; }
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover { background-color: #e63946; border-color: #e63946; color: #ffffff; box-shadow: 3px 3px 0px #f5c518; transform: translate(-1px, -1px); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration: none; border-bottom: 2px solid transparent; }
a:not([class]):hover { border-bottom-color: var(--color-primary); }

/* ========== 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: grid-3 */
.testimonial-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 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: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }

/* stats: big-number */
/* 大数字居中 */
                .stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
                .stats-grid .stat-value { font-size: 3rem; }

/* 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 */
a:not([class]):hover { color: var(--color-accent); }
.card { border-left: 3px solid var(--color-primary); border-top: 2px solid rgba(245,197,24,.3); border-right: 2px solid rgba(245,197,24,.3); border-bottom: 2px solid rgba(245,197,24,.3); }
header, .header, .navbar { box-shadow: 0 3px 0px rgba(245,197,24,.5); background-color: #0f0f1a; border-bottom: 2px solid #f5c518; }
.card:hover { box-shadow: 6px 6px 0px rgba(245,197,24,.6); transform: translate(-2px, -2px); }

/* 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; }
}