:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #4c1d95;
    --color-accent: #f59e0b;
    --color-surface: #ecfeff;
    --color-text: #0f172a;
    --rgb-primary: 124,58,237;
    --rgb-accent: 245,158,11;

    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 26px;

    --shadow-sm:
        0 1px 0 rgba(15, 23, 42, 0.08),
        0 8px 18px rgba(124, 58, 237, 0.10);
    --shadow-md:
        0 4px 10px rgba(15, 23, 42, 0.07),
        0 18px 30px rgba(15, 23, 42, 0.10);
    --shadow-lg:
        0 6px 18px rgba(15, 23, 42, 0.10),
        0 30px 60px rgba(124, 58, 237, 0.16),
        0 10px 20px -10px rgba(0, 0, 0, 0.22);

    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;

    --transition: 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);

    --heading-weight: 700;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: radial-gradient(900px 380px at 12% -10%, rgba(124,58,237,0.12), transparent 55%), radial-gradient(820px 360px at 92% 0%, rgba(245,158,11,0.10), transparent 50%), var(--color-surface); }
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 1px 0 rgba(255,255,255,0.55) inset,
        0 4px 10px rgba(15, 23, 42, 0.08),
        0 20px 40px -18px rgba(124, 58, 237, 0.25);
    padding: var(--space-card);
    transition:
        var(--transition),
        box-shadow var(--transition),
        transform var(--transition),
        border-color var(--transition),
        background var(--transition);
    border: 1px solid rgba(124, 58, 237, 0.16);
    background: linear-gradient(180deg, rgba(255,255,255,0.78), rgba(255,255,255,0.55));
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        background var(--transition),
        color var(--transition),
        border-color var(--transition),
        filter var(--transition);
    outline: 2px solid transparent;
    outline-offset: 2px;
}
a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-decoration-color: rgba(124, 58, 237, 0.35);
    text-shadow: 0 0 0 rgba(0,0,0,0);
}

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

/* news: grid-4 */
/* 四列紧凑网格 */
                .news-grid {
                    display: grid;
                    grid-template-columns: repeat(4, 1fr);
                    gap: calc(var(--space-gap) * 0.8);
                }

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

/* partners: scroll */
/* 自动滚动 */
                .partner-grid {
                    display: flex;
                    gap: 2rem;
                    overflow: hidden;
                    animation: partnerScroll 22s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
                    filter: saturate(1.05) contrast(1.02);
                }
                @keyframes partnerScroll {
                    0% { transform: translateX(0); }
                    100% { transform: translateX(-50%); }
                }

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }

/* 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: narrow-centered */
/* 窄版居中 */
            .page-main { max-width: 860px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-6px);
    box-shadow:
        0 1px 0 rgba(255,255,255,0.65) inset,
        0 10px 26px rgba(15, 23, 42, 0.10),
        0 40px 80px -40px rgba(124, 58, 237, 0.35);
    border-color: rgba(245, 158, 11, 0.35);
}
a:not([class]):hover {
    color: var(--color-accent);
    text-shadow: 0 10px 22px rgba(245, 158, 11, 0.18);
    text-decoration-color: rgba(245, 158, 11, 0.55);
}
.hero, [class*="hero"], section:first-of-type {
    background:
        radial-gradient(900px 420px at 15% 20%, rgba(124,58,237,0.55), transparent 55%),
        radial-gradient(700px 360px at 92% 20%, rgba(245,158,11,0.45), transparent 52%),
        linear-gradient(135deg, rgba(124,58,237,0.95), rgba(76,29,149,0.92) 52%, rgba(245,158,11,0.40));
    border-top: 1px solid rgba(255,255,255,0.18);
    border-bottom: 1px solid rgba(0,0,0,0.06);
    box-shadow:
        0 1px 0 rgba(255,255,255,0.35) inset,
        0 30px 70px -40px rgba(124,58,237,0.35);
}

/* 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; }
}