:root {
    --color-primary: #6b2fa0;
    --color-primary-dark: #3a1b5e;
    --color-accent: #b980e0;
    --color-surface: #f9f2fc;
    --color-text: #1c0e24;
    --rgb-primary: 107,47,160;
    --rgb-accent: 185,128,224;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 28px;
    --shadow-sm: 0 3px 6px rgba(107,47,160,0.1), 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 8px 24px rgba(107,47,160,0.12), 0 4px 12px rgba(0,0,0,0.06);
    --shadow-lg: 0 24px 48px rgba(107,47,160,0.15), 0 12px 24px rgba(0,0,0,0.08);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    --heading-weight: 700;
    --body-line-height: 1.6;
}

body { 
    color: var(--color-text); 
    line-height: var(--body-line-height); 
    background: linear-gradient(135deg, #f8f0ff 0%, #efe6f9 50%, #e6d8f2 100%);
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section { 
    padding-top: var(--space-section); 
    padding-bottom: var(--space-section); 
    background: radial-gradient(circle at 10% 20%, rgba(107,47,160,0.03) 0%, transparent 50%);
}
.card, [class*="card"] { 
    border-radius: var(--radius-lg); 
    box-shadow: var(--shadow-md); 
    padding: var(--space-card); 
    transition: var(--transition); 
    background: linear-gradient(135deg, #ffffff, #fcfaff);
    border-left: 3px solid;
    border-image: linear-gradient(180deg, var(--color-primary) 0%, var(--color-accent) 100%) 1;
}
.btn, button[class*="btn"], a[class*="btn"] { 
    border-radius: var(--radius-md); 
    transition: var(--transition); 
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: #fff;
    border: none;
    box-shadow: 0 4px 12px rgba(107,47,160,0.3);
}
a:not([class]) { 
    color: var(--color-primary); 
    transition: var(--transition); 
    text-decoration: none;
    border-bottom: 1px solid transparent;
}
a:not([class]):hover { 
    color: var(--color-accent); 
    border-bottom-color: var(--color-accent);
}

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

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

/* features: grid-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }

/* hero: overlay */
.hero { position: relative; min-height: 70vh; display: flex; align-items: center; background: radial-gradient(ellipse at center, rgba(107,47,160,0.1) 0%, transparent 70%); }
.hero-content { position: relative; z-index: 1; }

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

/* partners: scroll */
.partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 20s linear infinite; }
@keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* faq: with-sidebar */
.faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }

/* stats: big-number */
.stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
.stats-grid .stat-value { font-size: 3rem; background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

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

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

/* 条件性装饰 */
a:not([class]):hover { color: var(--color-accent); }
.card { 
    border-left: 3px solid; 
    border-image: linear-gradient(180deg, var(--color-primary) 0%, var(--color-accent) 100%) 1;
}
header, .header, .navbar { 
    box-shadow: 0 2px 12px rgba(107,47,160,0.08); 
    background: rgba(255,255,255,0.8);
    backdrop-filter: blur(12px);
}

/* 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; }
}