:root {
    --color-primary: #4338ca;
    --color-primary-dark: #1e1b4b;
    --color-accent: #06b6d4;
    --color-surface: #eef4ff;
    --color-text: #1c1b33;
    --rgb-primary: 67,56,202;
    --rgb-accent: 6,182,212;
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --shadow-sm: 0 2px 10px -2px rgba(49,46,129,.12), 0 1px 3px rgba(67,56,202,.07);
    --shadow-md: 0 16px 34px -12px rgba(49,46,129,.20), 0 6px 14px -6px rgba(67,56,202,.13);
    --shadow-lg: 0 32px 62px -18px rgba(30,27,75,.30), 0 14px 28px -14px rgba(6,182,212,.22);
    --space-section: 2.35rem;
    --space-card: 1.15rem;
    --space-gap: 0.85rem;
    --transition: 0.45s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 600;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: radial-gradient(1100px 560px at 10% -12%, #e0e7ff 0%, rgba(224,231,255,0) 62%), linear-gradient(180deg, #fbfcff 0%, #eef3ff 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: var(--color-primary-dark); }
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(67,56,202,.08); padding: var(--space-card); transition: var(--transition); background: linear-gradient(155deg, #ffffff 0%, #f6f9ff 62%, #eef6ff 100%); color: var(--color-text); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(135deg, #4f46e5 0%, #0ea5e9 100%); color: #f8fafc; box-shadow: 0 10px 22px -10px rgba(67,56,202,.55), inset 0 0 0 1px rgba(255,255,255,.18); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

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

/* news: list-view */
/* 列表模式 (图左文右) */
                .news-grid { display: flex; flex-direction: column; gap: var(--space-gap); }
                .news-grid .card { display: grid; grid-template-columns: 280px 1fr; }

/* features: centered */
/* 居中大卡片 */
                .feature-list { display: flex; flex-direction: column; align-items: center; gap: calc(var(--space-gap) * 2); max-width: 720px; margin: 0 auto; }

/* hero: minimal */
.hero { padding: 2.15rem 0; } .hero-content { max-width: 560px; }

/* 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: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }

/* stats: big-number */
/* 大数字居中 */
                .stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
                .stats-grid .stat-value { font-size: 3rem; color: var(--color-primary); text-shadow: 0 10px 26px rgba(6,182,212,.28); }

/* cta: card-style */
.cta-inner { background: linear-gradient(140deg, #eef2ff 0%, #e0f2fe 55%, #f5f3ff 100%); border-radius: var(--radius-xl); padding: 3.4rem; text-align: center; box-shadow: var(--shadow-lg), inset 0 0 0 1px rgba(67,56,202,.10); color: var(--color-primary-dark); }

/* Page Layout: wide */
/* 超宽 */
            .page-main { max-width: 1400px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg), inset 0 0 0 1px rgba(6,182,212,.28); }
a:not([class]):hover { color: var(--color-accent); }
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: 1.9rem; --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; }
}