:root {
    --color-primary: #1b2a4a;
    --color-primary-dark: #071225;
    --color-accent: #7c3aed;
    --color-surface: #f7fbff;
    --color-text: #0c1222;
    --rgb-primary: 27,42,74;
    --rgb-accent: 124,58,237;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --shadow-sm: 0 1px 0 rgba(7, 18, 37, .06), 0 6px 16px rgba(9, 18, 40, .08);
    --shadow-md: 0 10px 28px rgba(7, 18, 37, .14), 0 2px 0 rgba(255,255,255,.55) inset;
    --shadow-lg: 0 22px 60px rgba(7, 18, 37, .18), 0 10px 24px rgba(124,58,237,.16);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 520ms cubic-bezier(0.16, 1, 0.3, 1);
    --heading-weight: 650;
    --body-line-height: 1.75;
    --focus-ring: rgba(var(--rgb-accent), .42);
    --glow: rgba(var(--rgb-accent), .40);
    --glow-strong: rgba(var(--rgb-accent), .65);
}

/* 基础覆盖 */
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:
        0 1px 0 rgba(255,255,255,.65) inset,
        0 10px 28px rgba(7, 18, 37, .12),
        0 0 0 1px rgba(var(--rgb-primary), .08),
        0 0 24px rgba(var(--rgb-accent), .12);
    padding: var(--space-card);
    transition: var(--transition);
}
.card:focus-within,
[class*="card"]:focus-within {
    outline: 2px solid rgba(var(--rgb-accent), .35);
    outline-offset: 3px;
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow:
        0 1px 0 rgba(255,255,255,.55) inset,
        0 10px 22px rgba(7, 18, 37, .10);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); }
a:not([class]):hover { text-shadow: 0 0 22px rgba(var(--rgb-accent), .30); }

/* ========== 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); }

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

/* hero: overlay */
/* 全屏背景+文字覆盖 */
                .hero { position: relative; min-height: 70vh; display: flex; align-items: center; }
                .hero-content { position: relative; z-index: 1; }

/* 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: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }

/* stats: inline */
/* 水平排列 */
                .stats-grid { display: flex; justify-content: center; gap: 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; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-4px);
    box-shadow:
        0 1px 0 rgba(255,255,255,.70) inset,
        0 18px 44px rgba(7, 18, 37, .16),
        0 0 0 1px rgba(var(--rgb-accent), .18),
        0 0 32px rgba(var(--rgb-accent), .45);
    animation: glowPulse 1.35s ease-in-out infinite;
}
a:not([class]):hover { color: var(--color-accent); }
.card { border: 1px solid rgba(var(--rgb-accent), .18); }
header, .header, .navbar { background: transparent; }

/* 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; }
}

@keyframes glowPulse {
    0% {
        filter: saturate(1) brightness(1);
        box-shadow:
            0 1px 0 rgba(255,255,255,.70) inset,
            0 18px 44px rgba(7, 18, 37, .16),
            0 0 0 1px rgba(var(--rgb-accent), .16),
            0 0 26px rgba(var(--rgb-accent), .42);
    }
    50% {
        filter: saturate(1.05) brightness(1.02);
        box-shadow:
            0 1px 0 rgba(255,255,255,.75) inset,
            0 18px 44px rgba(7, 18, 37, .16),
            0 0 0 1px rgba(var(--rgb-accent), .22),
            0 0 38px rgba(var(--rgb-accent), .60);
    }
    100% {
        filter: saturate(1) brightness(1);
        box-shadow:
            0 1px 0 rgba(255,255,255,.70) inset,
            0 18px 44px rgba(7, 18, 37, .16),
            0 0 0 1px rgba(var(--rgb-accent), .16),
            0 0 26px rgba(var(--rgb-accent), .42);
    }
}