:root {
    --color-primary: #0ea5e9;
    --color-primary-dark: #075985;
    --color-accent: #67e8f9;
    --color-surface: #ecfeff;
    --color-text: #0b1220;
    --rgb-primary: 14,165,233;
    --rgb-accent: 103,232,249;
    --shadow-sm: 0 4px 10px rgba(14,165,233,0.10), 0 1px 0 rgba(255,255,255,0.55) inset;
    --shadow-md: 0 6px 18px rgba(5, 20, 41, 0.10), 0 14px 30px -14px rgba(14,165,233,0.28);
    --shadow-lg: 0 10px 28px rgba(5, 20, 41, 0.14), 0 26px 60px -20px rgba(14,165,233,0.35);
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 0.38s cubic-bezier(.2,.8,.2,1);
    --heading-weight: 650;
    --body-line-height: 1.6;
    --focus-outline: rgba(103,232,249,0.85);
}

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 4px 10px rgba(0,0,0,0.05),
        0 14px 28px -16px rgba(14,165,233,0.35);
    padding: var(--space-card);
    transition: var(--transition);
    background: color-mix(in oklab, #ffffff 92%, var(--color-surface) 8%);
    border: 1px solid rgba(7, 89, 133, 0.10);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow:
        0 3px 10px rgba(0,0,0,0.06),
        0 10px 25px -18px rgba(14,165,233,0.35);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-shadow: 0 1px 0 rgba(255,255,255,0.35); }

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

/* news: featured-top */
/* 首篇横跨全宽 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
                .news-grid > *:first-child { grid-column: span 3; }

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

/* hero: minimal */
.hero { padding: 2rem 0; } .hero-content { max-width: 560px; }

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

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }

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

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }

/* 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 4px 10px rgba(0,0,0,0.06),
        0 16px 38px -18px rgba(14,165,233,0.40),
        0 38px 80px -34px rgba(103,232,249,0.22);
    border-color: rgba(14,165,233,0.22);
}
a:not([class]):hover { color: color-mix(in oklab, var(--color-accent) 85%, var(--color-primary) 15%); }
.hero, [class*="hero"], section:first-of-type {
    background:
        radial-gradient(1200px 420px at 15% 5%, rgba(103,232,249,0.35) 0%, rgba(103,232,249,0.0) 55%),
        radial-gradient(900px 380px at 85% 15%, rgba(14,165,233,0.35) 0%, rgba(14,165,233,0.0) 55%),
        linear-gradient(135deg, #0ea5e9 0%, #075985 55%, #0b4a6b 100%);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.35);
}

/* 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; }
}