:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #5b21b6;
    --color-accent: #22c55e;
    --color-surface: #f5f3ff;
    --color-text: #111827;
    --rgb-primary: 124,58,237;
    --rgb-accent: 34,197,94;

    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 26px;
    --radius-xl: 40px;

    --shadow-sm: 0 1px 0 rgba(0,0,0,.12);
    --shadow-md:
        0 10px 28px rgba(20, 18, 48, .16),
        0 2px 6px rgba(20, 18, 48, .08),
        0 0 0 1px rgba(124,58,237,.10);
    --shadow-lg:
        0 18px 48px rgba(10, 10, 25, .20),
        0 6px 18px rgba(124,58,237,.18),
        0 1px 0 rgba(255,255,255,.22) inset,
        0 0 0 1px rgba(34,197,94,.14);

    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;

    --transition: 0.5s cubic-bezier(.22, 1, .36, 1);
    --heading-weight: 650;
    --body-line-height: 1.6;
}

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 14px 36px rgba(9, 9, 22, .18),
        0 3px 10px rgba(9, 9, 22, .10),
        0 0 0 1px rgba(124,58,237,.20),
        0 0 0 6px rgba(124,58,237,.06);
    padding: var(--space-card);
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        border-color var(--transition),
        background var(--transition),
        color var(--transition);
}

.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);
}

a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-shadow:
        0 1px 0 rgba(255,255,255,.35),
        0 8px 24px rgba(124,58,237,.18);
}

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

/* news: grid-3 */
/* 三列等宽网格 */
                .news-grid {
                    display: grid;
                    grid-template-columns: repeat(3, 1fr);
                    gap: var(--space-gap);
                }

/* features: grid-3 */
.feature-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-gap);
}

/* hero: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; }

/* 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: card-style */
.cta-inner {
    background:
        linear-gradient(135deg, rgba(124,58,237,.16) 0%, rgba(34,197,94,.10) 48%, rgba(59,130,246,.10) 100%),
        radial-gradient(900px 260px at 20% 0%, rgba(124,58,237,.35) 0%, rgba(124,58,237,0) 60%),
        radial-gradient(700px 220px at 95% 30%, rgba(34,197,94,.28) 0%, rgba(34,197,94,0) 62%),
        var(--color-surface);
    border-radius: var(--radius-xl);
    padding: 3rem;
    text-align: center;
    box-shadow:
        0 20px 60px rgba(10, 10, 25, .18),
        0 0 0 1px rgba(124,58,237,.18),
        0 0 0 10px rgba(124,58,237,.06);
}

/* 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(-6px);
    box-shadow:
        0 28px 78px rgba(10, 10, 25, .26),
        0 10px 24px rgba(124,58,237,.22),
        0 2px 8px rgba(34,197,94,.10),
        0 0 0 1px rgba(34,197,94,.20),
        0 0 0 12px rgba(34,197,94,.08);
}
a:not([class]):hover { color: #16a34a; }
.card {
    border-left-style: solid;
    border-left-color: #7c3aed;
    border-left-width: 3px;
    border-image: linear-gradient(180deg, rgba(124,58,237,1) 0%, rgba(34,197,94,1) 100%) 1;
}

/* 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; }
}