:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #4c1d95;
    --color-accent: #f2c14e;
    --color-surface: #17142a;
    --color-text: #ece8fb;
    --rgb-primary: 124,58,237;
    --rgb-accent: 242,193,78;
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 22px;
    --radius-xl: 28px;
    --shadow-sm: 0 4px 14px -6px rgba(124,58,237,.45), 0 2px 6px rgba(11,10,20,.70);
    --shadow-md: 0 18px 38px -18px rgba(124,58,237,.55), 0 32px 64px -40px rgba(0,0,0,.95);
    --shadow-lg: 0 34px 74px -30px rgba(124,58,237,.60), 0 16px 34px -20px rgba(0,0,0,.90);
    --space-section: 3.5rem;
    --space-card: 1.45rem;
    --space-gap: 1.15rem;
    --transition: 0.34s 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-color: #0f0f1a; background-image: radial-gradient(1100px 620px at 50% -10%, rgba(124,58,237,.42), rgba(15,15,26,0) 62%), radial-gradient(820px 480px at 50% 108%, rgba(242,193,78,.14), rgba(15,15,26,0) 60%); accent-color: var(--color-primary); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 2px 20px rgba(124,58,237,.38); }
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-color: var(--color-surface); background-image: linear-gradient(155deg, #241d3f 0%, #17142a 55%, #110f1f 100%); color: var(--color-text); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background-color: #6d28d9; background-image: linear-gradient(140deg, #8b5cf6 0%, #5b21b6 100%); color: #fdf7e6; box-shadow: var(--shadow-sm); }
a:not([class]) { color: var(--color-accent); 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: grid-3 */
.feature-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

/* hero: split */
/* 左文右图 */
                .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }

/* testimonials: stacked */
/* 垂直堆叠 */
                .testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; }

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

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: full-bg */
.cta-section { background-color: #4c1d95; background-image: radial-gradient(circle at 30% 18%, rgba(242,193,78,.28), rgba(76,29,149,0) 58%), linear-gradient(135deg, #3b0f70 0%, #7c3aed 55%, #4c1d95 100%); color: #fdf6e8; padding: 4.5rem 2.25rem; box-shadow: var(--shadow-lg); }

/* 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: #fff2cf; }
.card { border-left: 3px solid var(--color-accent); }
header, .header, .navbar { box-shadow: 0 14px 38px -22px rgba(0,0,0,.90), 0 1px 0 rgba(124,58,237,.42); }

/* 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: 1.15rem; --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; }
}