:root {
    --color-primary: #4338ca;
    --color-primary-dark: #312e81;
    --color-accent: #f97316;
    --color-surface: #eef2ff;
    --color-text: #1e1b3a;
    --rgb-primary: 67,56,202;
    --rgb-accent: 249,115,22;
    --block-a: #eef2ff;
    --block-b: #fff3e8;
    --block-c: #f5f3ff;
    --block-d: #ffe9ec;
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 22px;
    --radius-xl: 28px;
    --shadow-sm: 0 2px 10px -2px rgba(67,56,202,.18), 0 1px 2px rgba(30,27,58,.06);
    --shadow-md: 0 14px 34px -14px rgba(67,56,202,.30), 0 4px 12px -6px rgba(249,115,22,.18);
    --shadow-lg: 0 34px 68px -22px rgba(49,46,129,.42), 0 14px 32px -14px rgba(249,115,22,.28);
    --space-section: 2.25rem;
    --space-card: 1.15rem;
    --space-gap: 0.875rem;
    --transition: 0.42s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(180deg, #fbfaff 0%, #eef2ff 48%, #fff3e8 100%); caret-color: var(--color-accent); accent-color: var(--color-primary); }
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: 0 0 0 1px rgba(67,56,202,.10), var(--shadow-md); padding: var(--space-card); transition: var(--transition); background: linear-gradient(160deg, #ffffff 0%, #f5f3ff 100%); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); box-shadow: 0 12px 24px -12px rgba(67,56,202,.48); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-color: rgba(249,115,22,.55); }

/* ========== 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); background: var(--block-a); border-radius: var(--radius-xl); box-shadow: inset 0 0 0 1px rgba(67,56,202,.14); }

/* features: grid-3 */
.feature-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); background: var(--block-b); border-radius: var(--radius-xl); box-shadow: inset 0 0 0 1px rgba(249,115,22,.18); }

/* hero: overlay */
/* 全屏背景+文字覆盖 */
                .hero { position: relative; min-height: 70vh; display: flex; align-items: center; box-shadow: inset 0 -90px 130px -70px rgba(30,27,58,.38), inset 0 0 0 1px rgba(67,56,202,.10); }
                .hero-content { position: relative; z-index: 1; }

/* testimonials: carousel */
/* 单条轮播 */
                .testimonial-list { display: flex; overflow: hidden; background: var(--block-c); border-radius: var(--radius-xl); box-shadow: inset 0 0 0 1px rgba(67,56,202,.12); } 
                .testimonial-list > * { flex: 0 0 100%; }

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; background: var(--block-d); border-radius: var(--radius-xl); box-shadow: inset 0 0 0 1px rgba(249,115,22,.16); }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; background: var(--block-b); border-radius: var(--radius-xl); box-shadow: inset 0 0 0 1px rgba(67,56,202,.14); }

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; background: var(--block-a); border-radius: var(--radius-xl); box-shadow: inset 0 0 0 1px rgba(67,56,202,.14); }

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; background: linear-gradient(135deg, #eef2ff 0%, #f5f3ff 50%, #fff3e8 100%); border-radius: var(--radius-xl); box-shadow: 0 0 0 1px rgba(249,115,22,.20), var(--shadow-md); }

/* Page Layout: narrow-centered */
/* 窄版居中 */
            .page-main { max-width: 860px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); background: linear-gradient(160deg, #ffffff 0%, #eef2ff 100%); }
a:not([class]):hover { color: var(--color-accent); }

/* 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; background: var(--block-a); border-radius: var(--radius-lg); }
    .feature-list { grid-template-columns: 1fr !important; background: var(--block-b); border-radius: var(--radius-lg); }
    .faq-list { grid-template-columns: 1fr !important; }
    .testimonial-list { column-count: 1 !important; background: var(--block-c); border-radius: var(--radius-lg); }
    .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; border-radius: var(--radius-lg); }
}