:root {
    --color-primary: #1d4ed8;
    --color-primary-dark: #1e3a8a;
    --color-accent: #60a5fa;
    --color-surface: #f8fafc;
    --color-text: #0f172a;
    --rgb-primary: 29,78,216;
    --rgb-accent: 96,165,250;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 16px;
    --radius-xl: 22px;
    --shadow-sm: 0 1px 0 rgba(15,23,42,.05), 0 10px 22px rgba(15,23,42,.06);
    --shadow-md: 0 1px 0 rgba(15,23,42,.06), 0 10px 30px rgba(2,6,23,.10);
    --shadow-lg: 0 1px 0 rgba(15,23,42,.08), 0 18px 50px rgba(2,6,23,.18);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.18s cubic-bezier(.2,.9,.2,1);
    --heading-weight: 800;
    --body-line-height: 1.65;
}

body { color: var(--color-text); line-height: var(--body-line-height); background: #0b1220; }
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,.08),
        0 12px 35px rgba(2,6,23,.18),
        0 0 0 1px rgba(148,163,184,.12),
        0 0 18px rgba(59,130,246,.14);
    padding: var(--space-card);
    transition: transform 0.22s cubic-bezier(.2,.9,.2,1), box-shadow 0.22s cubic-bezier(.2,.9,.2,1), filter 0.22s cubic-bezier(.2,.9,.2,1), opacity 0.22s cubic-bezier(.2,.9,.2,1);
    background: linear-gradient(180deg, rgba(255,255,255,.94), rgba(255,255,255,.86));
    color: #0b1220;
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: transform 0.18s cubic-bezier(.2,.9,.2,1), box-shadow 0.18s cubic-bezier(.2,.9,.2,1), background-color 0.18s cubic-bezier(.2,.9,.2,1), color 0.18s cubic-bezier(.2,.9,.2,1);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-shadow: 0 0 18px rgba(59,130,246,.12); }
a:not([class]):focus-visible {
    outline: 2px solid rgba(96,165,250,.55);
    outline-offset: 3px;
    border-radius: 10px;
}

@keyframes dashGlowPulse {
    0% { filter: drop-shadow(0 0 0 rgba(96,165,250,.0)); opacity: .98; }
    50% { filter: drop-shadow(0 0 22px rgba(96,165,250,.22)); opacity: 1; }
    100% { filter: drop-shadow(0 0 0 rgba(96,165,250,.0)); opacity: .98; }
}

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

/* news: grid-3 */
/* 三列等宽网格 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.9rem; }

/* features: grid-3 */
.feature-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.9rem; }

/* hero: overlay */
/* 全屏背景+文字覆盖 */
                .hero { position: relative; min-height: 70vh; display: flex; align-items: center; background: radial-gradient(1200px 650px at 12% 10%, rgba(59,130,246,.22), rgba(59,130,246,0) 60%), radial-gradient(900px 520px at 85% 25%, rgba(96,165,250,.18), rgba(96,165,250,0) 55%), linear-gradient(180deg, rgba(15,23,42,.0), rgba(15,23,42,.35)); }
                .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: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 1.2rem; }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem; }

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.9rem; text-align: center; }

/* cta: full-bg */
.cta-section {
    background: linear-gradient(120deg, rgba(29,78,216,.98), rgba(59,130,246,.98));
    color: rgba(255,255,255,.96);
    padding: 4rem 2rem;
    box-shadow: 0 24px 60px rgba(29,78,216,.22), inset 0 0 0 1px rgba(255,255,255,.14);
}
.cta-section * { caret-color: #ffffff; accent-color: #ffffff; }

/* 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,.10),
        0 18px 55px rgba(2,6,23,.22),
        0 0 0 1px rgba(96,165,250,.26),
        0 0 32px rgba(59,130,246,.45);
    filter: saturate(1.02);
    animation: dashGlowPulse 1.1s ease-in-out infinite;
}
a:not([class]):hover {
    color: var(--color-accent);
    text-shadow: 0 0 26px rgba(96,165,250,.35);
}
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; }
}