:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #5b21b6;
    --color-accent: #22c55e;
    --color-surface: #fbfbff;
    --color-text: #0f172a;
    --rgb-primary: 124,58,237;
    --rgb-accent: 34,197,94;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 16px;
    --shadow-sm: 0 2px 10px rgba(var(--rgb-primary), .18);
    --shadow-md: 0 10px 28px rgba(var(--rgb-primary), .16), 0 2px 8px rgba(2, 6, 23, .06);
    --shadow-lg: 0 18px 50px rgba(var(--rgb-primary), .16), 0 6px 18px rgba(2, 6, 23, .08);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 260ms cubic-bezier(.2,.8,.2,1);
    --heading-weight: 650;
    --body-line-height: 1.65;
    --ring: 0 0 0 3px rgba(var(--rgb-accent), .28);
    --glow: 0 0 24px rgba(var(--rgb-primary), .38);
    --glow-strong: 0 0 32px rgba(var(--rgb-primary), .55);
}

body { color: var(--color-text); line-height: var(--body-line-height); background: radial-gradient(1200px 600px at 15% -10%, rgba(var(--rgb-primary), .10), transparent 55%), radial-gradient(900px 500px at 90% 0%, rgba(var(--rgb-accent), .10), transparent 50%), 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,.6) inset,
        0 -1px 0 rgba(2,6,23,.05) inset,
        0 12px 30px rgba(var(--rgb-primary), .14),
        0 2px 10px rgba(2, 6, 23, .06);
    padding: var(--space-card);
    transition: transform var(--transition), box-shadow var(--transition), filter var(--transition), border-color var(--transition), background var(--transition);
    background:
        linear-gradient(180deg, rgba(255,255,255,.75), rgba(255,255,255,.35));
    border: 1px solid rgba(15, 23, 42, .08);
}

.card, [class*="card"]:hover {
    box-shadow:
        0 1px 0 rgba(255,255,255,.65) inset,
        0 -1px 0 rgba(2,6,23,.06) inset,
        0 14px 38px rgba(var(--rgb-primary), .18),
        0 0 0 1px rgba(var(--rgb-primary), .22),
        var(--glow-strong);
    filter: saturate(1.05);
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
}

a:not([class]) { color: rgba(var(--rgb-primary), 1); transition: var(--transition); text-decoration-color: rgba(var(--rgb-primary), .35); }
a:not([class]):hover { color: rgba(var(--rgb-accent), 1); text-decoration-color: rgba(var(--rgb-accent), .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-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }

/* 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: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 22s linear infinite; }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

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

/* stats: inline */
/* 水平排列 */
                .stats-grid { display: flex; justify-content: center; gap: 3rem; }

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }

/* 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: var(--color-accent); }

.hero, [class*="hero"], section:first-of-type {
    background:
        radial-gradient(900px 380px at 20% 10%, rgba(var(--rgb-accent), .26), transparent 55%),
        radial-gradient(760px 420px at 95% 0%, rgba(var(--rgb-primary), .35), transparent 52%),
        linear-gradient(135deg, rgba(var(--rgb-primary), .98), rgba(var(--rgb-primary-dark), .92));
}

.card { border-left: 3px solid var(--color-primary); }

header, .header, .navbar { background: transparent; }

/* 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; }
}