:root {
    --color-primary: #6d28d9;
    --color-primary-dark: #4c1d95;
    --color-accent: #22c55e;
    --color-surface: #0b1220;
    --color-text: #e5e7eb;

    --rgb-primary: 109,40,217;
    --rgb-accent: 34,197,94;

    --radius-sm: 9px;
    --radius-md: 14px;
    --radius-lg: 16px;
    --radius-xl: 22px;

    --shadow-sm: 0 6px 14px rgba(0,0,0,.22);
    --shadow-md: 0 14px 28px rgba(0,0,0,.28), 0 0 0 1px rgba(var(--rgb-primary),.14);
    --shadow-lg: 0 26px 60px rgba(0,0,0,.35), 0 0 0 1px rgba(var(--rgb-primary),.18);

    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;

    --transition: 520ms cubic-bezier(.2,.9,.2,1);
    --heading-weight: 800;
    --body-line-height: 1.7;
    --glow-1: rgba(var(--rgb-accent),.38);
    --glow-2: rgba(var(--rgb-accent),.62);
    --glow-3: rgba(var(--rgb-primary),.35);
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: radial-gradient(1000px 600px at 20% 10%, rgba(var(--rgb-primary),.18), transparent 55%), radial-gradient(900px 550px at 80% 0%, rgba(var(--rgb-accent),.12), transparent 58%), linear-gradient(180deg, #070b14 0%, #0b1220 55%, #070b14 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 1px 0 rgba(255,255,255,.06); }
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: transform 520ms cubic-bezier(.2,.9,.2,1), box-shadow 520ms cubic-bezier(.2,.9,.2,1), border-color 520ms cubic-bezier(.2,.9,.2,1), background 520ms cubic-bezier(.2,.9,.2,1), filter 520ms cubic-bezier(.2,.9,.2,1);
    box-shadow:
        0 18px 40px rgba(0,0,0,.38),
        0 0 0 1px rgba(var(--rgb-primary),.18),
        0 0 0 6px rgba(109,40,217,.05);
    background:
        linear-gradient(180deg, rgba(255,255,255,.06) 0%, rgba(255,255,255,.02) 100%);
    border: 1px solid rgba(var(--rgb-primary), .22);
}
.card:hover, [class*="card"]:hover {
    box-shadow:
        0 26px 62px rgba(0,0,0,.45),
        0 0 0 1px rgba(var(--rgb-primary),.26),
        0 0 24px rgba(var(--rgb-accent),.35);
    filter: saturate(1.06);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: transform 520ms cubic-bezier(.2,.9,.2,1), box-shadow 520ms cubic-bezier(.2,.9,.2,1), background 520ms cubic-bezier(.2,.9,.2,1), color 520ms cubic-bezier(.2,.9,.2,1), border-color 520ms cubic-bezier(.2,.9,.2,1);
    box-shadow:
        0 10px 28px rgba(0,0,0,.26),
        0 0 0 1px rgba(var(--rgb-primary),.24);
}
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover {
    box-shadow:
        0 14px 34px rgba(0,0,0,.32),
        0 0 0 1px rgba(var(--rgb-primary),.32),
        0 0 32px rgba(var(--rgb-accent),.48);
}
a:not([class]) {
    color: #a78bfa;
    transition: color 420ms cubic-bezier(.2,.9,.2,1), text-shadow 420ms cubic-bezier(.2,.9,.2,1);
}
a:not([class]):hover {
    color: #34d399;
    text-shadow: 0 0 18px rgba(var(--rgb-accent),.35);
}

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

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }

/* Page Layout: wide */
/* 超宽 */
            .page-main { max-width: 1400px; margin: 0 auto; }

/* 条件性装饰 */
.card { border-color: rgba(var(--rgb-primary), .28); border-style: solid; border-width: 1px; background-image: linear-gradient(135deg, rgba(var(--rgb-primary),.13), rgba(var(--rgb-accent),.08)); }
header, .header, .navbar {
    background: rgba(255,255,255,.02);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(var(--rgb-primary),.18);
    box-shadow:
        0 14px 34px rgba(0,0,0,.26),
        0 0 22px rgba(var(--rgb-primary),.10);
}

/* 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; }
}