:root {
    --color-primary: #2f6fdb;
    --color-primary-dark: #1f4f9f;
    --color-accent: #18d5a6;
    --color-surface: #f6fbff;
    --color-text: #0f1b2a;
    --rgb-primary: 47,111,219;
    --rgb-accent: 24,213,166;
    --radius-sm: 5px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --shadow-sm: 0 1px 0 rgba(15,27,42,0.08);
    --shadow-md: 0 10px 26px rgba(16,24,40,0.10), 0 2px 8px rgba(16,24,40,0.06), 0 0 0 1px rgba(31,79,159,0.08) inset;
    --shadow-lg: 0 18px 42px rgba(16,24,40,0.14), 0 6px 18px rgba(16,24,40,0.10), 0 0 0 1px rgba(24,213,166,0.14) inset;
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 520ms cubic-bezier(0.2, 0.8, 0.2, 1);
    --heading-weight: 700;
    --body-line-height: 1.7;
}

body { color: var(--color-text); line-height: var(--body-line-height); background: radial-gradient(900px 420px at 20% 0%, rgba(47,111,219,0.10), rgba(47,111,219,0) 60%), radial-gradient(900px 420px at 80% 0%, rgba(24,213,166,0.10), rgba(24,213,166,0) 60%), var(--color-surface); }

h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 1px 0 rgba(255,255,255,0.6); }

section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }

.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow:
        0 0 0 1px rgba(31,79,159,0.12) inset,
        0 10px 26px rgba(16,24,40,0.10),
        0 2px 10px rgba(16,24,40,0.06),
        0 0 0 rgba(0,0,0,0);
    padding: var(--space-card);
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        filter var(--transition),
        border-color var(--transition),
        background-color var(--transition),
        opacity var(--transition);
    background:
        linear-gradient(180deg, rgba(255,255,255,0.92), rgba(255,255,255,0.70));
    opacity: 1;
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        background-color var(--transition),
        border-color var(--transition),
        color var(--transition),
        filter var(--transition);
    box-shadow:
        0 0 0 1px rgba(24,213,166,0.18) inset,
        0 10px 22px rgba(16,24,40,0.10);
    background:
        linear-gradient(135deg, rgba(24,213,166,0.18), rgba(47,111,219,0.10));
    color: var(--color-text);
    caret-color: var(--color-accent);
    outline-color: rgba(24,213,166,0.55);
}

a:not([class]) { color: var(--color-primary); transition: var(--transition); text-shadow: none; }

.card:hover, [class*="card"]:hover {
    transform: translateY(-4px);
    box-shadow:
        0 0 0 1px rgba(24,213,166,0.22) inset,
        0 18px 44px rgba(16,24,40,0.16),
        0 0 24px rgba(var(--rgb-accent), 0.40),
        0 0 0 rgba(0,0,0,0);
    filter: saturate(1.04);
    animation: glowPulse 1.25s ease-in-out infinite;
}

a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 18px rgba(var(--rgb-accent), 0.38); }

@keyframes glowPulse {
    0% { box-shadow:
        0 0 0 1px rgba(24,213,166,0.22) inset,
        0 18px 44px rgba(16,24,40,0.16),
        0 0 18px rgba(var(--rgb-accent), 0.34),
        0 0 0 rgba(0,0,0,0);
    }
    50% { box-shadow:
        0 0 0 1px rgba(24,213,166,0.26) inset,
        0 18px 44px rgba(16,24,40,0.16),
        0 0 32px rgba(var(--rgb-accent), 0.60),
        0 0 0 rgba(0,0,0,0);
    }
    100% { box-shadow:
        0 0 0 1px rgba(24,213,166,0.22) inset,
        0 18px 44px rgba(16,24,40,0.16),
        0 0 18px rgba(var(--rgb-accent), 0.34),
        0 0 0 rgba(0,0,0,0);
    }
}

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

/* news: featured-left */
/* 左大右小 (1大+2小) */
                .news-grid { display: grid; grid-template-columns: 2fr 1fr; grid-template-rows: auto auto; gap: var(--space-gap); }
                .news-grid > *:first-child { grid-row: span 2; }

/* 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: carousel */
/* 单条轮播 */
                .testimonial-list { display: flex; overflow: hidden; } 
                .testimonial-list > * { flex: 0 0 100%; }

/* 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: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }

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