:root {
    --color-primary: #6b7cff;
    --color-primary-dark: #4457d6;
    --color-accent: #ff8a5b;
    --color-surface: #f3f5f9;
    --color-text: #243046;
    --rgb-primary: 107,124,255;
    --rgb-accent: 255,138,91;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 26px;
    --shadow-sm: 0 3px 10px rgba(36,48,70,.05), 0 10px 24px -14px rgba(36,48,70,.18);
    --shadow-md: 0 6px 16px rgba(36,48,70,.06), 0 18px 42px -16px rgba(36,48,70,.16);
    --shadow-lg: 0 10px 24px rgba(107,124,255,.10), 0 28px 56px -18px rgba(36,48,70,.22);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 0.38s cubic-bezier(.22,.61,.36,1);
    --heading-weight: 600;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(180deg, #eef2f7 0%, #f7f9fc 100%); caret-color: var(--color-primary); accent-color: var(--color-primary); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: #182235; text-shadow: 0 1px 0 rgba(255,255,255,.72); }
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, #ffffff 0%, #fcfdff 100%); border-color: rgba(98,113,145,.16); border-style: solid; backdrop-filter: blur(10px); filter: saturate(1.02); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(135deg, #6b7cff 0%, #8592ff 100%); color: #ffffff; border-color: rgba(68,87,214,.24); border-style: solid; box-shadow: 0 8px 18px rgba(107,124,255,.18), 0 18px 34px -18px rgba(68,87,214,.34); text-shadow: 0 1px 1px rgba(40,49,87,.16); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-color: rgba(var(--rgb-primary), .35); text-shadow: 0 1px 0 rgba(255,255,255,.65); }

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

/* news: featured-left */
/* 左大右小 (1大+2小) */
                .news-grid { display: grid; grid-template-columns: 2fr 1fr; grid-template-rows: auto auto; gap: var(--space-gap); }
                .news-grid > *:first-child { grid-row: span 2; }

/* 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; }

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

/* cta: full-bg */
.cta-section { background: linear-gradient(135deg, #5f73ff 0%, #7c89ff 52%, #ff8a5b 100%); color: #fefeff; padding: 4rem 2rem; box-shadow: inset 0 1px 0 rgba(255,255,255,.18), 0 20px 48px -24px rgba(58,73,142,.45); border-radius: var(--radius-xl); text-shadow: 0 1px 2px rgba(32,41,74,.22); }

/* 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 12px 28px rgba(36,48,70,.08), 0 30px 60px -20px rgba(36,48,70,.22), 0 0 0 1px rgba(107,124,255,.08); }
a:not([class]):hover { color: var(--color-accent); text-decoration-color: rgba(var(--rgb-accent), .5); }
.card { border: 1px solid rgba(98,113,145,.14); }
header, .header, .navbar { background: linear-gradient(180deg, rgba(255,255,255,.72) 0%, rgba(255,255,255,.38) 100%); backdrop-filter: blur(14px); box-shadow: 0 6px 18px rgba(36,48,70,.05); }

/* 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; }
}