:root {
    --color-primary: #1a1a2e;
    --color-primary-dark: #0f0f1a;
    --color-accent: #e94560;
    --color-surface: #f5f5f5;
    --color-text: #0f0f0f;
    --rgb-primary: 26,26,46;
    --rgb-accent: 233,69,96;
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 4px;
    --radius-xl: 4px;
    --shadow-sm: 3px 3px 0px #1a1a2e;
    --shadow-md: 4px 4px 0px #1a1a2e;
    --shadow-lg: 5px 5px 0px #1a1a2e;
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 0.15s ease-in-out;
    --heading-weight: 600;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background-color: #ededed; }
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); border: 2px solid #1a1a2e; background-color: #ffffff; }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); border: 2px solid var(--color-accent); background-color: var(--color-accent); color: #ffffff; }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

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

/* news: grid-3 */
/* 三列等宽网格 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); background-color: #f0f0f0; border: 2px solid #1a1a2e; padding: 1rem; border-radius: var(--radius-sm); }

/* features: horizontal */
/* 水平滚动 */
                .feature-list { display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; background-color: #e6e6e6; border: 2px solid #1a1a2e; padding: 1rem; border-radius: var(--radius-sm); }
                .feature-list > * { flex: 0 0 300px; scroll-snap-align: start; border: 2px solid #e94560; border-radius: var(--radius-sm); background-color: #ffffff; box-shadow: 3px 3px 0px #1a1a2e; }

/* hero: split */
/* 左文右图 */
                .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; background-color: #ffd166; border: 2px solid #1a1a2e; padding: 2rem; border-radius: var(--radius-sm); }

/* testimonials: grid-3 */
.testimonial-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); background-color: #f4f1de; border: 2px solid #1a1a2e; padding: 1rem; border-radius: var(--radius-sm); }

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; background-color: #e0fbfc; border: 2px solid #1a1a2e; padding: 1rem; border-radius: var(--radius-sm); }

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; background-color: #d9d9d9; border: 2px solid #1a1a2e; padding: 1rem; border-radius: var(--radius-sm); }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; background-color: #caf0f8; border: 2px solid #1a1a2e; padding: 1rem; border-radius: var(--radius-sm); }

/* cta: full-bg */
.cta-section { background: var(--color-primary); color: #fff; padding: 4rem 2rem; border: 2px solid #e94560; }

/* Page Layout: wide */
/* 超宽 */
            .page-main { max-width: 1400px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
a:not([class]):hover { color: var(--color-accent); }
header, .header, .navbar { box-shadow: 3px 3px 0px #1a1a2e; border-bottom: 2px solid #1a1a2e; background-color: #ffffff; }

/* 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; }
}