:root {
    --color-primary: #0ea5e9;
    --color-primary-dark: #0369a1;
    --color-accent: #22c55e;
    --color-surface: #f3f4f6;
    --color-text: #052e2a;
    --rgb-primary: 14,165,233;
    --rgb-accent: 34,197,94;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 16px;
    --radius-xl: 22px;
    --shadow-sm: 0 2px 10px rgba(3,105,161,.14);
    --shadow-md: 0 10px 26px rgba(3,105,161,.10);
    --shadow-lg: 0 18px 48px rgba(3,105,161,.12);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 220ms cubic-bezier(.2,.8,.2,1);
    --heading-weight: 600;
    --body-line-height: 1.6;
    --shadow-glow: 0 0 24px rgba(var(--rgb-accent), .40);
    --shadow-halo: 0 0 32px rgba(var(--rgb-accent), .60);
    --shadow-border: rgba(2,132,199,.20);
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: var(--color-surface); }
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,.75) inset,
        0 0 0 1px rgba(2,132,199,.10),
        0 12px 30px rgba(3,105,161,.12),
        0 22px 60px rgba(2,132,199,.08);
    padding: var(--space-card);
    transition:
        box-shadow 240ms cubic-bezier(.2,.8,.2,1),
        transform 240ms cubic-bezier(.2,.8,.2,1),
        background-color 240ms cubic-bezier(.2,.8,.2,1),
        border-color 240ms cubic-bezier(.2,.8,.2,1);
    background: #ffffff;
    position: relative;
}
.card::after, [class*="card"]::after {
    content: "";
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    pointer-events: none;
    opacity: .0;
    transition: opacity 240ms cubic-bezier(.2,.8,.2,1);
    box-shadow: var(--shadow-glow);
}
.card:hover::after, [class*="card"]:hover::after { opacity: 1; box-shadow: var(--shadow-halo); }
.card:hover, [class*="card"]:hover { box-shadow: 0 1px 0 rgba(255,255,255,.78) inset, 0 0 0 1px rgba(34,197,94,.22), 0 14px 34px rgba(3,105,161,.14), 0 26px 72px rgba(34,197,94,.10), var(--shadow-halo); }

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition:
        box-shadow 240ms cubic-bezier(.2,.8,.2,1),
        transform 240ms cubic-bezier(.2,.8,.2,1),
        background-color 240ms cubic-bezier(.2,.8,.2,1),
        color 240ms cubic-bezier(.2,.8,.2,1),
        border-color 240ms cubic-bezier(.2,.8,.2,1),
        filter 240ms cubic-bezier(.2,.8,.2,1);
}
a:not([class]) { color: var(--color-primary-dark); transition: var(--transition); text-shadow: 0 1px 0 rgba(255,255,255,.55); }

/* ========== 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-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }

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

/* testimonials: stacked */
/* 垂直堆叠 */
                .testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; }

/* 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; text-shadow: 0 10px 30px rgba(2,132,199,.18); }

/* cta: full-bg */
.cta-section {
    background: radial-gradient(1200px 420px at 15% 25%, rgba(var(--rgb-accent), .35), transparent 55%),
                linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #f0fdf4;
    padding: 4rem 2rem;
    box-shadow: 0 18px 60px rgba(3,105,161,.18);
    position: relative;
    overflow: hidden;
}
.cta-section::before{
    content:"";
    position:absolute;
    inset:-2px;
    background:
        conic-gradient(from 180deg at 50% 50%,
            rgba(var(--rgb-accent), .0) 0deg,
            rgba(var(--rgb-accent), .45) 90deg,
            rgba(var(--rgb-primary), .0) 180deg,
            rgba(var(--rgb-accent), .35) 270deg,
            rgba(var(--rgb-accent), .0) 360deg);
    opacity:.25;
    filter: blur(14px);
    pointer-events:none;
}

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

/* 条件性装饰 */
a:not([class]):hover {
    color: rgba(var(--rgb-accent), 1);
    text-shadow: 0 0 18px rgba(var(--rgb-accent), .35);
}
.hero, [class*="hero"], section:first-of-type {
    background:
        radial-gradient(900px 420px at 15% 25%, rgba(var(--rgb-accent), .26), transparent 60%),
        radial-gradient(800px 360px at 85% 35%, rgba(var(--rgb-primary), .22), transparent 58%),
        linear-gradient(135deg, rgba(14,165,233,1), rgba(3,105,161,1));
    color: #ecfeff;
    box-shadow: 0 16px 50px rgba(2,132,199,.18);
}

.card { border: 1px solid rgba(var(--rgb-primary), .14); }

/* header / navbar subtle depth */
header, .header, .navbar { box-shadow: 0 2px 12px rgba(2,132,199,.14), 0 10px 30px rgba(3,105,161,.10); }

/* 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; --radius-lg: 14px; --radius-md: 12px; }
    .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; }
}