:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #6d28d9;
    --color-accent: #22c55e;
    --color-surface: #ecfeff;
    --color-text: #0f172a;
    --rgb-primary: 124,58,237;
    --rgb-accent: 34,197,94;
    --radius-sm: 1px;
    --radius-md: 6px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --shadow-sm: 0 1px 0 rgba(15,23,42,.06), 0 10px 18px rgba(124,58,237,.08);
    --shadow-md: 0 10px 30px rgba(2,6,23,.14), 0 1px 0 rgba(255,255,255,.55) inset, 0 0 0 1px rgba(124,58,237,.14) inset;
    --shadow-lg: 0 30px 70px rgba(2,6,23,.18), 0 8px 22px rgba(124,58,237,.18), 0 1px 0 rgba(255,255,255,.6) inset, 0 0 0 1px rgba(34,197,94,.12) inset;
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 24px;
    --transition: 0.52s cubic-bezier(.16,1,.3,1);
    --heading-weight: 650;
    --body-line-height: 1.65;
    --glow-1: rgba(124,58,237,.35);
    --glow-2: rgba(34,197,94,.28);
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background:
        radial-gradient(1200px 600px at 15% -10%, rgba(124,58,237,.18), transparent 55%),
        radial-gradient(900px 520px at 90% 10%, rgba(34,197,94,.16), transparent 52%),
        linear-gradient(180deg, rgba(236,254,255,.85), rgba(255,255,255,1) 42%, rgba(255,255,255,1));
    caret-color: var(--color-primary-dark);
    accent-color: var(--color-accent);
}
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);
    padding: var(--space-card);
    transition: var(--transition);
    box-shadow:
        0 1px 0 rgba(255,255,255,.6) inset,
        0 0 0 1px rgba(124,58,237,.14) inset,
        0 14px 34px rgba(2,6,23,.16),
        0 2px 10px rgba(124,58,237,.12),
        0 0 0 10px rgba(124,58,237,.03);
    background:
        linear-gradient(180deg, rgba(255,255,255,.9), rgba(255,255,255,.78)),
        radial-gradient(700px 240px at 10% 0%, rgba(124,58,237,.16), transparent 55%),
        radial-gradient(600px 220px at 95% 15%, rgba(34,197,94,.12), transparent 58%);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow:
        0 1px 0 rgba(255,255,255,.65) inset,
        0 10px 24px rgba(2,6,23,.12),
        0 0 0 1px rgba(124,58,237,.18) inset;
    background:
        linear-gradient(180deg, rgba(124,58,237,.95), rgba(109,40,217,.95));
    color: rgba(255,255,255,.96);
}
a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-shadow: 0 1px 0 rgba(255,255,255,.4);
}
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 18px rgba(34,197,94,.35); }
.card { border: 1px solid rgba(var(--rgb-primary), .16); }
header, .header, .navbar {
    background:
        linear-gradient(180deg, rgba(2,6,23,.02), rgba(2,6,23,.01)),
        radial-gradient(800px 220px at 20% 0%, rgba(124,58,237,.12), transparent 55%),
        radial-gradient(700px 220px at 90% 20%, rgba(34,197,94,.10), transparent 58%);
}

/* ========== 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: centered */
/* 居中大卡片 */
                .feature-list { display: flex; flex-direction: column; align-items: center; gap: calc(var(--space-gap) * 2); max-width: 720px; margin: 0 auto; }

/* hero: left-aligned */
.hero-content { text-align: left; max-width: 600px; }

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

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }

/* 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: 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; }

/* 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; }
}