:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #5b21b6;
    --color-accent: #f59e0b;
    --color-surface: #f5f3ff;
    --color-text: #1f1b2e;
    --rgb-primary: 124,58,237;
    --rgb-accent: 245,158,11;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 26px;
    --shadow-sm: 0 1px 0 rgba(255,255,255,.55), 0 2px 10px rgba(17, 24, 39, .08);
    --shadow-md: 0 6px 18px rgba(0,0,0,.10), 0 2px 8px rgba(0,0,0,.06), 0 1px 0 rgba(255,255,255,.55);
    --shadow-lg: 0 10px 26px rgba(0,0,0,.16), 0 6px 16px -6px rgba(124,58,237,.35), 0 2px 8px rgba(0,0,0,.08);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 0.35s ease;
    --heading-weight: 650;
    --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: var(--shadow-md); padding: var(--space-card); transition: var(--transition); background: linear-gradient(180deg, rgba(255,255,255,.78), rgba(255,255,255,.62)); backdrop-filter: blur(6px); }
.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(255,255,255,.35); }

/* ========== Section Layout Variants ========== */

/* news: masonry-2 */
/* 两列瀑布流 */
                .news-grid { column-count: 2; column-gap: var(--space-gap); }
                .news-grid .card { break-inside: avoid; margin-bottom: var(--space-gap); }

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

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

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
                .testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }

/* 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: radial-gradient(1200px 500px at 20% 20%, rgba(245,158,11,.35), rgba(245,158,11,0) 55%), radial-gradient(900px 420px at 90% 10%, rgba(124,58,237,.55), rgba(124,58,237,0) 52%), linear-gradient(135deg, var(--color-primary), var(--color-primary-dark)); color: rgba(255,255,255,.96); padding: 4rem 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(-4px); box-shadow: 0 16px 40px rgba(0,0,0,.18), 0 8px 22px -10px rgba(124,58,237,.55), 0 3px 10px rgba(0,0,0,.10); }
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 18px rgba(245,158,11,.35); }
.hero, [class*="hero"], section:first-of-type { background: radial-gradient(900px 420px at 50% 20%, rgba(255,255,255,.10), rgba(255,255,255,0) 52%), linear-gradient(135deg, #0f0f1a, #2a0f4b 48%, #0b1220); }
.card { border-left: 3px solid var(--color-primary); border-color: var(--color-primary); border-style: solid; }
header, .header, .navbar { box-shadow: 0 10px 26px rgba(0,0,0,.12), 0 2px 8px rgba(0,0,0,.06), 0 1px 0 rgba(255,255,255,.35); backdrop-filter: blur(8px); background: rgba(255,255,255,.04); }

/* 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; }
}