:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #5b21b6;
    --color-accent: #fbbf24;
    --color-surface: #ffffff;
    --color-text: #101225;
    --rgb-primary: 124,58,237;
    --rgb-accent: 251,191,36;
    --radius-sm: 10px;
    --radius-md: 12px;
    --radius-lg: 14px;
    --radius-xl: 16px;
    --shadow-sm: 0 10px 24px rgba(14, 10, 30, .18);
    --shadow-md: 0 18px 44px rgba(10, 8, 22, .28), 0 2px 0 rgba(255, 255, 255, .18) inset, 0 0 0 1px rgba(255, 255, 255, .10) inset;
    --shadow-lg: 0 26px 70px rgba(10, 8, 22, .34), 0 0 28px rgba(124, 58, 237, .22), 0 0 0 1px rgba(255, 255, 255, .14) inset;
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 520ms cubic-bezier(0.16, 1, 0.3, 1);
    --heading-weight: 650;
    --body-line-height: 1.75;
}

body { color: var(--color-text); 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:
        0 16px 34px rgba(6, 4, 18, .28),
        0 2px 0 rgba(255, 255, 255, .22) inset,
        0 0 0 1px rgba(255, 255, 255, .10) inset;
    padding: var(--space-card);
    transition:
        transform 520ms cubic-bezier(0.16, 1, 0.3, 1),
        box-shadow 520ms cubic-bezier(0.16, 1, 0.3, 1),
        background-color 520ms cubic-bezier(0.16, 1, 0.3, 1),
        border-color 520ms cubic-bezier(0.16, 1, 0.3, 1),
        filter 520ms cubic-bezier(0.16, 1, 0.3, 1);
    background:
        radial-gradient(120% 120% at 15% 0%, rgba(124, 58, 237, .10), rgba(255,255,255,0) 55%),
        radial-gradient(120% 120% at 90% 30%, rgba(251, 191, 36, .10), rgba(255,255,255,0) 58%),
        var(--color-surface);
    border: 1px solid rgba(255, 255, 255, .16);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition:
        transform 520ms cubic-bezier(0.16, 1, 0.3, 1),
        box-shadow 520ms cubic-bezier(0.16, 1, 0.3, 1),
        background-color 520ms cubic-bezier(0.16, 1, 0.3, 1),
        color 520ms cubic-bezier(0.16, 1, 0.3, 1),
        filter 520ms cubic-bezier(0.16, 1, 0.3, 1);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

@keyframes glowPulse {
    0% { opacity: .72; filter: blur(0px); transform: translateY(0); }
    50% { opacity: .98; filter: blur(.2px); transform: translateY(-1px); }
    100% { opacity: .72; filter: blur(0px); transform: translateY(0); }
}

/* ========== 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: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
                .testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }

/* stats: big-number */
/* 大数字居中 */
                .stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
                .stats-grid .stat-value { font-size: 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:
        0 30px 92px rgba(6, 4, 18, .44),
        0 0 36px rgba(251, 191, 36, .42),
        0 0 18px rgba(124, 58, 237, .26),
        0 2px 0 rgba(255, 255, 255, .24) inset,
        0 0 0 1px rgba(255, 255, 255, .18) inset;
    filter: saturate(1.06);
}
.hero, [class*="hero"], section:first-of-type {
    background:
        radial-gradient(1000px 420px at 50% 20%, rgba(251, 191, 36, .13), rgba(255,255,255,0) 55%),
        radial-gradient(900px 420px at 10% 0%, rgba(124, 58, 237, .24), rgba(255,255,255,0) 55%),
        linear-gradient(135deg, #0f0f1a 0%, #14112b 45%, #0c0b16 100%);
}

/* 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; }
}