:root {
    --color-primary: #4338ca;
    --color-primary-dark: #312e81;
    --color-accent: #22d3ee;
    --color-surface: #fff7ea;
    --color-text: #14183a;
    --color-ink: #0d1030;
    --color-ink-soft: #1b1f4d;
    --color-on-dark: #e9edff;
    --rgb-primary: 67,56,202;
    --rgb-accent: 34,211,238;
    --rgb-ink: 13,16,48;
    --radius-sm: 8px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 16px;
    --shadow-sm: 0 0 12px rgba(var(--rgb-accent), .28), 0 2px 6px rgba(var(--rgb-ink), .10);
    --shadow-md: 0 0 24px rgba(var(--rgb-accent), .40), 0 10px 26px rgba(var(--rgb-ink), .14);
    --shadow-lg: 0 0 48px rgba(var(--rgb-accent), .50), 0 22px 52px rgba(var(--rgb-ink), .20);
    --space-section: 4.75rem;
    --space-card: 1.75rem;
    --space-gap: 1.4rem;
    --transition: 0.28s cubic-bezier(.22,.61,.36,1);
    --heading-weight: 800;
    --body-line-height: 1.65;
}

/* 基础覆盖 */
body { background: #ffffff; color: var(--color-text); line-height: var(--body-line-height); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 0 28px rgba(var(--rgb-accent), .28); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); background: linear-gradient(180deg, #ffffff 0%, var(--color-surface) 55%, #ffffff 100%); }
.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: #ffffff; color: var(--color-text); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%); color: #ffffff; box-shadow: 0 0 32px rgba(var(--rgb-accent), .55), 0 10px 22px rgba(var(--rgb-ink), .18); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-color: rgba(var(--rgb-accent), .65); }

/* ========== 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; background: linear-gradient(135deg, var(--color-ink-soft) 0%, var(--color-ink) 100%); color: var(--color-on-dark); border-radius: var(--radius-xl); box-shadow: 0 0 32px rgba(var(--rgb-accent), .38), 0 18px 42px rgba(var(--rgb-ink), .45); }

/* features: grid-3 */
.feature-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

/* hero: minimal */
.hero { padding: 2rem 0; background: radial-gradient(65% 100% at 50% 0%, rgba(var(--rgb-accent), .20) 0%, rgba(var(--rgb-accent), 0) 72%); } .hero-content { max-width: 560px; }

/* testimonials: grid-3 */
.testimonial-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; color: var(--color-primary-dark); text-shadow: 0 0 24px rgba(var(--rgb-accent), .45); }

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; background: linear-gradient(120deg, var(--color-ink-soft) 0%, var(--color-primary-dark) 100%); color: var(--color-on-dark); border-radius: var(--radius-xl); box-shadow: 0 0 48px rgba(var(--rgb-accent), .42), 0 20px 44px rgba(var(--rgb-ink), .38); }

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

/* 条件性装饰 */
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 32px rgba(var(--rgb-accent), .60); }

/* 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: 0.85rem; }
    .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; }
}