:root {
    --color-primary: #6f4bd8;
    --color-primary-dark: #27164f;
    --color-accent: #d4a94b;
    --color-surface: #f6f1ff;
    --color-text: #171426;
    --rgb-primary: 111,75,216;
    --rgb-accent: 212,169,75;
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 5px;
    --radius-xl: 6px;
    --shadow-sm: 0 1px 2px rgba(18,16,35,.08), 0 0 0 1px rgba(111,75,216,.06);
    --shadow-md: 0 6px 14px rgba(13,10,28,.08), 0 1px 0 rgba(255,255,255,.55) inset, 0 0 0 1px rgba(83,57,163,.08);
    --shadow-lg: 0 10px 24px rgba(15,12,34,.12), 0 0 0 1px rgba(212,169,75,.14), 0 1px 0 rgba(255,255,255,.6) inset;
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 0.22s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 800;
    --body-line-height: 1.7;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(180deg, #0f0f1a 0%, #171426 42%, #f8f5ff 42.1%, #f8f5ff 100%); caret-color: var(--color-primary); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: #120f22; text-shadow: 0 1px 0 rgba(255,255,255,.45); }
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: linear-gradient(180deg, #ffffff 0%, #f7f2ff 100%); border-color: rgba(111,75,216,.14); border-style: solid; backdrop-filter: blur(4px); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(180deg, #7a58de 0%, #5f3fc5 100%); color: #ffffff; border-color: rgba(212,169,75,.45); border-style: solid; box-shadow: 0 4px 10px rgba(50,31,105,.16), 0 0 0 1px rgba(255,255,255,.1) inset; text-shadow: 0 1px 1px rgba(0,0,0,.18); accent-color: var(--color-accent); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-color: rgba(111,75,216,.35); }

/* ========== 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); }

/* features: grid-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }

/* 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: 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; }

/* cta: full-bg */
.cta-section { background: linear-gradient(135deg, #1a1430 0%, #5f3fc5 58%, #d4a94b 100%); color: #fffaf0; padding: 4rem 2rem; box-shadow: inset 0 1px 0 rgba(255,255,255,.12), 0 -10px 30px rgba(16,12,35,.18); text-shadow: 0 1px 2px rgba(0,0,0,.18); }

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
            .page-main { max-width: 1200px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); filter: saturate(1.03) brightness(1.01); }
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 10px rgba(212,169,75,.18); }

/* 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; }
    .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; }
}