:root {
    --color-primary: #0ea5e9;
    --color-primary-dark: #0369a1;
    --color-accent: #f97316;
    --color-surface: #fff7ea;
    --color-text: #0b1b3a;
    --rgb-primary: 14,165,233;
    --rgb-accent: 249,115,22;
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 10px;
    --radius-xl: 14px;
    --shadow-sm: 0 1px 0 rgba(var(--rgb-primary), .08), 0 8px 18px rgba(2, 132, 199, .08);
    --shadow-md: 0 1px 0 rgba(3, 105, 161, .06), 0 10px 26px rgba(2, 132, 199, .10);
    --shadow-lg: 0 1px 0 rgba(3, 105, 161, .07), 0 18px 44px rgba(2, 132, 199, .14);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 120ms cubic-bezier(.2,.9,.2,1);
    --heading-weight: 600;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(180deg, #ffffff 0%, #f6fbff 55%, #fff7ea 100%); }
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: 5px; box-shadow: 0 1px 0 rgba(var(--rgb-primary), .10), 0 6px 16px rgba(14,165,233,.10), 0 0 0 1px rgba(14,165,233,.06) inset; padding: var(--space-card); transition: var(--transition); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: 7px; transition: var(--transition); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-shadow: 0 1px 0 rgba(255,255,255,.45); }

a:not([class]):focus, a:not([class]):hover { text-decoration-thickness: 2px; }

/* ========== 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: horizontal */
/* 水平滚动 */
                .feature-list { display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; }
                .feature-list > * { flex: 0 0 300px; scroll-snap-align: start; }
                .feature-list { scrollbar-color: rgba(3, 105, 161, .35) rgba(0,0,0,0); }
                .feature-list::-webkit-scrollbar { height: 10px; }
                .feature-list::-webkit-scrollbar-thumb { background: linear-gradient(180deg, rgba(14,165,233,.35), rgba(3,105,161,.25)); border-radius: 999px; border: 2px solid transparent; background-clip: content-box; }
                .feature-list::-webkit-scrollbar-track { background: transparent; }

/* 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: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }

/* 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: narrow-centered */
/* 窄版居中 */
            .page-main { max-width: 860px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-3px); box-shadow: 0 1px 0 rgba(var(--rgb-primary), .14), 0 14px 36px rgba(14,165,233,.18), 0 0 0 1px rgba(14,165,233,.10) inset; }
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 1px 0 rgba(255,255,255,.55); }
.hero, [class*="hero"], section:first-of-type { 
    background: linear-gradient(90deg, rgba(255,255,255,.95) 0%, rgba(255,255,255,.75) 18%, rgba(14,165,233,.14) 42%, rgba(3,105,161,.20) 62%, rgba(249,115,22,.14) 100%);
    box-shadow: 0 1px 0 rgba(3, 105, 161, .06) inset, 0 -1px 0 rgba(249,115,22,.06) inset;
}

section:nth-of-type(2) { 
    background: linear-gradient(180deg, rgba(255,247,234,1) 0%, rgba(255,247,234,.92) 100%);
}
section:nth-of-type(3) { 
    background: linear-gradient(180deg, rgba(10, 19, 43, .94) 0%, rgba(3, 105, 161, .18) 100%);
    color: #eaf3ff;
}
section:nth-of-type(4) { 
    background: linear-gradient(180deg, rgba(255,255,255,1) 0%, rgba(250, 245, 255, .96) 100%);
}

.card { border: 1px solid rgba(var(--rgb-primary), .10); }
header, .header, .navbar { box-shadow: 0 8px 26px rgba(2, 132, 199, .10), 0 2px 0 rgba(3, 105, 161, .05); }

/* 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; }
}