:root {
    --color-primary: #0b6bcb;
    --color-primary-dark: #074a86;
    --color-accent: #e65d0b;
    --color-surface: #fff3d6;
    --color-text: #111827;
    --rgb-primary: 11,107,203;
    --rgb-accent: 230,93,11;
    --radius-sm: 0px;
    --radius-md: 1px;
    --radius-lg: 2px;
    --radius-xl: 3px;
    --shadow-sm: 4px 4px 0 rgba(var(--rgb-primary),.35);
    --shadow-md: 4px 4px 0 rgba(var(--rgb-accent),.28), 6px 6px 0 rgba(var(--rgb-primary),.12);
    --shadow-lg: 4px 4px 0 rgba(var(--rgb-accent),.38), 10px 10px 18px rgba(17,24,39,.14);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.15s cubic-bezier(.2,.8,.2,1);
    --heading-weight: 700;
    --body-line-height: 1.6;
}

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: 4px 4px 0 rgba(var(--rgb-primary),.32), 0 0 0 2px rgba(var(--rgb-primary),.12); padding: var(--space-card); transition: var(--transition); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-shadow: 0 1px 0 rgba(0,0,0,.08); }

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

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

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }

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

/* cta: card-style */
.cta-inner { background: linear-gradient(180deg, #fff6e7 0%, var(--color-surface) 65%, #ffe9b8 100%); border-radius: var(--radius-xl); padding: 3rem; text-align: center; box-shadow: 4px 4px 0 rgba(var(--rgb-primary),.28), 0 0 0 3px rgba(var(--rgb-accent),.15); border: 3px solid rgba(var(--rgb-accent),.15); }

/* 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: 4px 4px 0 rgba(var(--rgb-accent),.45), 10px 10px 20px rgba(17,24,39,.18); }
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(135deg, #0ea5e9 0%, #2563eb 35%, var(--color-primary-dark) 70%, #0b1220 110%); border-top: 3px solid rgba(var(--rgb-accent),.35); border-bottom: 3px solid rgba(var(--rgb-primary),.35); box-shadow: inset 0 0 0 2px rgba(255,255,255,.12); }
header, .header, .navbar { box-shadow: 4px 4px 0 rgba(37,99,235,.14), 0 10px 24px rgba(0,0,0,.10); border-bottom: 2px solid rgba(11,107,203,.25); }

/* 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; border-width: 2px; box-shadow: 4px 4px 0 rgba(var(--rgb-primary),.24), 0 0 0 2px rgba(var(--rgb-accent),.14); }
}