:root {
    --color-primary: #7c5cff;
    --color-primary-dark: #4b2fd6;
    --color-accent: #e8b04b;
    --color-surface: #fbf9ff;
    --color-text: #1a1330;
    --color-ink: #ece8ff;
    --color-stage: #0f0f1a;
    --rgb-primary: 124,92,255;
    --rgb-accent: 232,176,75;
    --radius-sm: 12px;
    --radius-md: 18px;
    --radius-lg: 22px;
    --radius-xl: 28px;
    --shadow-sm: 0 1px 2px rgba(15,15,26,0.05), 0 4px 10px rgba(15,15,26,0.06);
    --shadow-md: 0 4px 8px rgba(15,15,26,0.05), 0 20px 40px -10px rgba(15,15,26,0.12);
    --shadow-lg: 0 10px 20px rgba(15,15,26,0.10), 0 36px 68px -14px rgba(75,47,214,0.38);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 0.4s cubic-bezier(0.25, 0.8, 0.3, 1);
    --heading-weight: 700;
    --body-line-height: 1.7;
}

/* 基础覆盖 */
body {
    color: var(--color-ink);
    background-color: var(--color-stage);
    background-image:
        radial-gradient(1200px 620px at 50% -12%, rgba(124,92,255,0.38), rgba(15,15,26,0) 70%),
        radial-gradient(900px 520px at 50% 112%, rgba(232,176,75,0.20), rgba(15,15,26,0) 72%);
    accent-color: var(--color-accent);
    caret-color: var(--color-accent);
    line-height: var(--body-line-height);
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
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(180deg, rgba(124,92,255,0.05) 0%, rgba(124,92,255,0) 55%);
    color: var(--color-text);
    border-color: rgba(124,92,255,0.16);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    color: #fdfbff;
    background-image: linear-gradient(135deg, #8a6bff 0%, #4b2fd6 100%);
    box-shadow: 0 4px 10px rgba(75,47,214,0.28), 0 16px 34px -14px rgba(75,47,214,0.50);
    border-color: rgba(232,176,75,0.45);
}
a:not([class]) { color: var(--color-accent); transition: var(--transition); }

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

/* news: featured-left */
/* 左大右小 (1大+2小) */
                .news-grid { display: grid; grid-template-columns: 2fr 1fr; grid-template-rows: auto auto; gap: var(--space-gap); }
                .news-grid > *:first-child { grid-row: span 2; }

/* 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: carousel */
/* 单条轮播 */
                .testimonial-list { display: flex; overflow: hidden; }
                .testimonial-list > * { flex: 0 0 100%; }

/* 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: inline */
/* 水平排列 */
                .stats-grid { display: flex; justify-content: center; gap: 3rem; }

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }

/* 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(-4px); box-shadow: var(--shadow-lg); }
.card { border-left: 3px solid 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; }
    .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; }
}