:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #5b21b6;
    --color-accent: #f59e0b;
    --color-surface: #fffbeb;
    --color-text: #292524;
    --rgb-primary: 124,58,237;
    --rgb-accent: 245,158,11;
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --shadow-sm: 0 2px 8px rgba(124,58,237,.08), 0 1px 2px rgba(245,158,11,.06);
    --shadow-md: 0 12px 28px rgba(124,58,237,.12), 0 4px 8px rgba(245,158,11,.08);
    --shadow-lg: 0 20px 44px rgba(124,58,237,.16), 0 8px 16px rgba(245,158,11,.12);
    --space-section: 5.5rem;
    --space-card: 2.25rem;
    --space-gap: 1.75rem;
    --transition: 0.55s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(135deg, var(--color-surface) 0%, #faf5ff 50%, #ecfeff 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: var(--color-primary-dark); text-shadow: 0 1px 6px rgba(124,58,237,.15); }
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), inset 0 0 0 1px rgba(var(--rgb-accent), .18);
    padding: var(--space-card);
    transition: var(--transition);
    background: linear-gradient(145deg, rgba(255,255,255,.94), rgba(255,255,255,.84));
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    background: linear-gradient(120deg, var(--color-primary), var(--color-accent));
    color: #fff;
    box-shadow: 0 6px 18px rgba(124,58,237,.28), inset 0 1px 0 rgba(255,255,255,.25);
    text-shadow: 0 1px 2px rgba(0,0,0,.18);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-shadow: 0 1px 4px rgba(var(--rgb-primary), .15); }

/* ========== 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); background: linear-gradient(145deg, rgba(var(--rgb-primary), .06), transparent 60%); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.news-grid > *:first-child { grid-column: span 3; }

/* features: horizontal */
/* 水平滚动 */
.feature-list { display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; background: linear-gradient(90deg, rgba(var(--rgb-accent), .05), rgba(var(--rgb-primary), .04)); border-radius: var(--radius-xl); box-shadow: var(--shadow-sm); }
.feature-list > * { flex: 0 0 300px; scroll-snap-align: start; }

/* hero: split */
/* 左文右图 */
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2.25rem; align-items: center; background: linear-gradient(160deg, rgba(var(--rgb-primary), .05), rgba(var(--rgb-accent), .06)); border-radius: var(--radius-xl); box-shadow: var(--shadow-sm); }

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); background: linear-gradient(180deg, rgba(var(--rgb-primary), .03), transparent); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.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) * 1.25); align-items: center; background: linear-gradient(135deg, rgba(var(--rgb-accent), .06), rgba(var(--rgb-primary), .04)); border-radius: var(--radius-xl); box-shadow: var(--shadow-sm); }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
.faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2.25rem; background: linear-gradient(135deg, rgba(var(--rgb-primary), .05), rgba(var(--rgb-accent), .05)); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }

/* stats: big-number */
/* 大数字居中 */
.stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2.25rem; background: radial-gradient(circle at 20% 20%, rgba(var(--rgb-primary), .08), transparent 50%), radial-gradient(circle at 80% 80%, rgba(var(--rgb-accent), .08), transparent 50%); border-radius: var(--radius-xl); box-shadow: var(--shadow-sm); }
.stats-grid .stat-value { font-size: 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); text-shadow: 0 2px 10px rgba(var(--rgb-accent), .35); }
.card { border: 1px solid transparent; background:
    linear-gradient(160deg, rgba(255,255,255,.94), rgba(255,255,255,.78)) padding-box,
    linear-gradient(135deg, rgba(var(--rgb-primary), .7), rgba(var(--rgb-accent), .5), rgba(8,145,178,.6)) border-box; }
header, .header, .navbar { background: linear-gradient(180deg, rgba(255,255,255,.8), rgba(255,255,255,.35)); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }

/* 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: 2.25rem; --space-card: 1.1rem; --space-gap: .85rem; }
    .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; }
}