:root {
    --color-primary: #0ea5e9;
    --color-primary-dark: #0369a1;
    --color-accent: #a78bfa;
    --color-surface: #ecfeff;
    --color-text: #0f172a;
    --rgb-primary: 14,165,233;
    --rgb-accent: 167,139,250;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 26px;
    --shadow-sm: 0 1px 0 rgba(2,6,23,.08);
    --shadow-md: 0 10px 24px rgba(2,6,23,.08), 0 2px 8px rgba(2,6,23,.06), 0 0 0 1px rgba(2,6,23,.04);
    --shadow-lg: 0 16px 40px rgba(2,6,23,.12), 0 6px 18px rgba(2,6,23,.08), 0 0 0 1px rgba(2,6,23,.05), 0 0 24px rgba(167,139,250,.22);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 280ms cubic-bezier(.2,.8,.2,1);
    --heading-weight: 700;
    --body-line-height: 1.7;
}

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:
        0 14px 36px rgba(2,6,23,.10),
        0 3px 10px rgba(2,6,23,.07),
        0 0 0 1px rgba(2,6,23,.06),
        0 0 0 rgba(167,139,250,0);
    padding: var(--space-card);
    transition: var(--transition);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow:
        0 10px 22px rgba(2,6,23,.08),
        0 0 0 1px rgba(2,6,23,.06);
}
a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-shadow: 0 0 0 rgba(0,0,0,0);
}

:root { accent-color: var(--color-accent); caret-color: var(--color-accent); }

/* ========== 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: horizontal */
/* 水平滚动 */
                .feature-list { display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; }
                .feature-list > * { flex: 0 0 300px; scroll-snap-align: start; }
                .feature-list::-webkit-scrollbar { height: 10px; }
                .feature-list::-webkit-scrollbar-thumb {
                    background: linear-gradient(90deg, rgba(167,139,250,.45), rgba(14,165,233,.35));
                    border-radius: 999px;
                    box-shadow: 0 0 14px rgba(167,139,250,.18);
                }
                .feature-list::-webkit-scrollbar-track { background: rgba(2,6,23,.06); }

/* 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: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 20s linear infinite; }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }

/* 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 420px at 20% 0%, rgba(167,139,250,.65) 0%, rgba(167,139,250,0) 55%),
        radial-gradient(900px 380px at 85% 30%, rgba(14,165,233,.55) 0%, rgba(14,165,233,0) 60%),
        linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 55%, #0b1220 120%);
    color: #ffffff;
    padding: 4rem 2rem;
    box-shadow: inset 0 0 0 1px rgba(255,255,255,.14);
}

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

/* 条件性装饰 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-4px);
    box-shadow:
        0 20px 56px rgba(2,6,23,.14),
        0 6px 22px rgba(2,6,23,.10),
        0 0 0 1px rgba(2,6,23,.06),
        0 0 32px rgba(167,139,250,.42);
    animation: glowPulse 1.4s ease-in-out infinite;
}
@keyframes glowPulse {
    0%, 100% {
        filter: saturate(1) brightness(1);
    }
    50% {
        filter: saturate(1.05) brightness(1.03);
    }
}
.hero, [class*="hero"], section:first-of-type {
    background:
        radial-gradient(900px 420px at 15% 10%, rgba(167,139,250,.55) 0%, rgba(167,139,250,0) 55%),
        radial-gradient(820px 360px at 88% 30%, rgba(14,165,233,.55) 0%, rgba(14,165,233,0) 60%),
        linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 60%, #0b1220 120%);
    box-shadow: inset 0 0 0 1px rgba(255,255,255,.10);
}
header, .header, .navbar {
    box-shadow:
        0 10px 26px rgba(2,6,23,.10),
        0 2px 10px rgba(2,6,23,.06),
        0 0 24px rgba(167,139,250,.14);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* 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; }
}