:root {
    --color-primary: #0ea5e9;
    --color-primary-dark: #0369a1;
    --color-accent: #22c55e;
    --color-surface: #f0f9ff;
    --color-text: #0b1220;
    --rgb-primary: 14,165,233;
    --rgb-accent: 34,197,94;
    --radius-sm: 3px;
    --radius-md: 6px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --shadow-sm: 0 6px 18px rgba(var(--rgb-primary), .16), 0 1px 0 rgba(0,0,0,.06);
    --shadow-md: 0 14px 36px rgba(var(--rgb-primary), .14), 0 2px 0 rgba(0,0,0,.05), 0 0 0 1px rgba(14,165,233,.18) inset;
    --shadow-lg: 0 22px 60px rgba(var(--rgb-primary), .18), 0 6px 18px rgba(2,132,199,.18), 0 0 0 1px rgba(34,197,94,.16) inset;
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 1.5rem;
    --transition: 0.5s cubic-bezier(.2,.85,.25,1);
    --heading-weight: 650;
    --body-line-height: 1.75;
    --card-glow: rgba(34,197,94,.20);
    --ring: rgba(14,165,233,.35);
    --ring-2: rgba(34,197,94,.28);
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: radial-gradient(1200px 600px at 10% -10%, rgba(14,165,233,.14), transparent 55%), radial-gradient(900px 520px at 95% 0%, rgba(34,197,94,.14), transparent 50%), linear-gradient(180deg, #f7fbff 0%, #f0f9ff 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: var(--radius-lg); box-shadow: 0 18px 44px rgba(var(--rgb-primary), .16), 0 3px 0 rgba(0,0,0,.04), 0 0 0 1px rgba(14,165,233,.16) inset, 0 0 0 0 rgba(34,197,94,.0); padding: var(--space-card); transition: var(--transition); background: linear-gradient(180deg, rgba(255,255,255,.88) 0%, rgba(255,255,255,.68) 100%); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(135deg, rgba(14,165,233,.95) 0%, rgba(3,105,161,.95) 55%, rgba(2,132,199,.95) 100%); color: #f8fafc; box-shadow: 0 14px 30px rgba(14,165,233,.22), 0 0 0 1px rgba(255,255,255,.22) inset, 0 2px 0 rgba(0,0,0,.06); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-shadow: 0 1px 0 rgba(0,0,0,.04); }

a:not([class]):hover { color: var(--color-accent); }
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover { box-shadow: 0 22px 55px rgba(14,165,233,.28), 0 0 0 1px rgba(34,197,94,.25) inset, 0 2px 0 rgba(0,0,0,.06); transform: translateY(-2px); }

.card:hover, [class*="card"]:hover { transform: translateY(-6px); box-shadow: 0 28px 78px rgba(var(--rgb-primary), .24), 0 10px 30px rgba(34,197,94,.16), 0 0 0 1px rgba(34,197,94,.22) inset; }

/* ========== 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: centered */
/* 居中大卡片 */
                .feature-list { display: flex; flex-direction: column; align-items: center; gap: calc(var(--space-gap) * 2); max-width: 720px; margin: 0 auto; }

/* hero: left-aligned */
.hero-content { text-align: left; max-width: 600px; }

/* 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: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: full-bg */
.cta-section { 
    background: linear-gradient(135deg, #0ea5e9 0%, #0369a1 40%, #059669 100%);
    color: #f8fafc;
    padding: 4rem 2rem;
    box-shadow: 0 26px 90px rgba(14,165,233,.26), 0 0 0 1px rgba(255,255,255,.16) inset;
    position: relative;
    overflow: hidden;
}
.cta-section:before{
    content:"";
    position:absolute;
    inset:-2px;
    background: radial-gradient(700px 220px at 20% 0%, rgba(255,255,255,.30), transparent 55%), radial-gradient(520px 240px at 85% 30%, rgba(34,197,94,.30), transparent 60%);
    opacity:.9;
    pointer-events:none;
}

/* Page Layout: wide */
/* 超宽 */
            .page-main { max-width: 1400px; margin: 0 auto; }

/* 条件性装饰 */
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(135deg, rgba(14,165,233,.98) 0%, rgba(3,105,161,.92) 48%, rgba(34,197,94,.88) 100%); box-shadow: 0 22px 80px rgba(14,165,233,.22), 0 0 0 1px rgba(255,255,255,.14) inset; }
.card { border-left: 3px solid rgba(14,165,233,.95); border-top-left-radius: calc(var(--radius-lg) + 2px); }
header, .header, .navbar { box-shadow: 0 10px 30px rgba(2,6,23,.10), 0 1px 0 rgba(255,255,255,.45) inset; background: rgba(255,255,255,.62); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border: 1px solid rgba(14,165,233,.16); }

/* 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: 1.25rem; }
    .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; }
}