:root {
    --color-primary: #0ea5e9;
    --color-primary-dark: #0369a1;
    --color-accent: #22c55e;
    --color-surface: #f0fdf4;
    --color-text: #052e16;
    --rgb-primary: 14,165,233;
    --rgb-accent: 34,197,94;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --shadow-sm:
        0 1px 0 rgba(2,6,23,.06),
        0 10px 22px rgba(2,6,23,.06);
    --shadow-md:
        0 10px 28px rgba(2,6,23,.10),
        0 2px 8px rgba(2,6,23,.06),
        0 0 0 1px rgba(2,132,199,.10);
    --shadow-lg:
        0 18px 44px rgba(2,6,23,.14),
        0 6px 16px rgba(2,6,23,.08),
        0 0 30px rgba(14,165,233,.10);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 340ms cubic-bezier(.2,.9,.2,1);
    --heading-weight: 600;
    --body-line-height: 1.7;
}

/* 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 0 0 1px rgba(var(--rgb-primary), .10),
        0 10px 22px rgba(2,6,23,.10),
        0 1px 6px rgba(2,6,23,.06),
        0 0 24px rgba(var(--rgb-accent), .14);
    padding: var(--space-card);
    transition: var(--transition);
    background-clip: padding-box;
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow:
        0 0 0 1px rgba(var(--rgb-primary), .18),
        0 10px 24px rgba(2,6,23,.10),
        0 0 18px rgba(var(--rgb-primary), .10);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); }
.card { border: 1px solid rgba(var(--rgb-primary), .10); }

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

/* 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: 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: card-style */
.cta-inner {
    background: radial-gradient(1200px 500px at 20% 10%, rgba(var(--rgb-accent), .18), transparent 55%),
                radial-gradient(900px 420px at 85% 20%, rgba(var(--rgb-primary), .18), transparent 60%),
                linear-gradient(135deg, #ffffff, var(--color-surface));
    border-radius: var(--radius-xl);
    padding: 3rem;
    text-align: center;
    box-shadow:
        0 0 0 1px rgba(var(--rgb-primary), .10),
        0 20px 60px rgba(2,6,23,.12),
        0 0 28px rgba(var(--rgb-accent), .18);
}

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
            .page-main { max-width: 1200px; margin: 0 auto; }

/* 条件性装饰 */
.hero, [class*="hero"], section:first-of-type {
    background:
        linear-gradient(90deg, rgba(var(--rgb-primary), .18), transparent 35%),
        linear-gradient(180deg, rgba(255,255,255,.0), rgba(255,255,255,.0)),
        linear-gradient(135deg, #0ea5e9, #0369a1);
    box-shadow:
        inset 0 0 0 1px rgba(255,255,255,.10),
        0 0 0 1px rgba(0,0,0,.02);
}
section:first-of-type { position: relative; }
section:first-of-type::before{
    content:"";
    position:absolute;
    inset: 0;
    border-radius: var(--radius-xl);
    background:
        radial-gradient(900px 280px at 15% 25%, rgba(var(--rgb-accent), .22), transparent 60%),
        radial-gradient(700px 260px at 80% 35%, rgba(var(--rgb-primary), .22), transparent 58%);
    opacity: .9;
    pointer-events:none;
}

/* 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; }
}