:root {
    --color-primary: #334155;
    --color-primary-dark: #0b1220;
    --color-accent: #ff3d81;
    --color-surface: #f8fafc;
    --color-text: #0b1220;

    --rgb-primary: 51,65,85;
    --rgb-accent: 255,61,129;

    --radius-sm: 0;
    --radius-md: 2px;
    --radius-lg: 2px;
    --radius-xl: 4px;

    --shadow-sm: 4px 4px 0 rgba(51,65,85,.35);
    --shadow-md: 4px 4px 0 rgba(51,65,85,.45), 8px 8px 18px rgba(11,18,32,.10);
    --shadow-lg: 4px 4px 0 rgba(51,65,85,.55), 10px 12px 26px rgba(11,18,32,.14);

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

    --transition: 0.15s cubic-bezier(0.2, 1, 0.2, 1);
    --heading-weight: 700;
    --body-line-height: 1.7;

    --card-border: rgba(51,65,85,.28);
    --card-edge: rgba(15,23,42,.10);
}

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:
        4px 4px 0 rgba(var(--rgb-primary), .55),
        0 0 0 2px rgba(255,255,255,.55) inset,
        10px 16px 28px rgba(11,18,32,.10);
    padding: var(--space-card);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
}
a:not([class]) {
    color: #1f2a44;
    text-shadow: 0 1px 0 rgba(255,255,255,.35);
    transition: color var(--transition), text-shadow var(--transition);
}

.card:hover, [class*="card"]:hover {
    transform: translateY(-4px);
    box-shadow:
        4px 4px 0 rgba(var(--rgb-primary), .70),
        0 0 0 2px rgba(255,255,255,.65) inset,
        14px 22px 40px rgba(11,18,32,.14);
}
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 0 rgba(0,0,0,0); }
.hero, [class*="hero"], section:first-of-type {
    background:
        linear-gradient(135deg, #ff3d81 0%, #6d28d9 35%, #2563eb 75%, #0b1220 100%);
    color: #ffffff;
}
.card { border: 2px solid var(--card-border); }

header, .header, .navbar { background: transparent; }

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

/* news: grid-4 */
/* 四列紧凑网格 */
                .news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 0.8); }

/* features: grid-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }

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

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

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); 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: wide */
/* 超宽 */
            .page-main { max-width: 1400px; margin: 0 auto; }

/* 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; }
}