:root {
    --color-primary: #5b21b6;
    --color-primary-dark: #111827;
    --color-accent: #22c55e;
    --color-surface: #fefce8;
    --color-text: #0b1220;
    --rgb-primary: 91,33,182;
    --rgb-accent: 34,197,94;
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 6px;
    --radius-xl: 8px;
    --shadow-sm: 0 1px 0 rgba(17,24,39,.25), 0 2px 10px rgba(91,33,182,.10);
    --shadow-md: 0 2px 0 rgba(17,24,39,.20), 0 10px 28px rgba(91,33,182,.14), 0 1px 0 rgba(34,197,94,.08) inset;
    --shadow-lg: 0 3px 0 rgba(17,24,39,.18), 0 18px 46px rgba(91,33,182,.18), 0 0 0 1px rgba(91,33,182,.14) inset;
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 320ms cubic-bezier(0.2, 0.9, 0.2, 1);
    --heading-weight: 700;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: radial-gradient(1200px 600px at 15% 0%, rgba(91,33,182,.10), transparent 60%), radial-gradient(900px 520px at 90% 10%, rgba(34,197,94,.10), transparent 55%), 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-xl);
    box-shadow: 0 1px 0 rgba(17,24,39,.20), 0 12px 30px rgba(91,33,182,.16), 0 0 0 1px rgba(91,33,182,.22) inset, 0 -1px 0 rgba(34,197,94,.10) inset;
    padding: var(--space-card);
    transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition), filter var(--transition);
    border: 1px solid rgba(91,33,182,.28);
    background: linear-gradient(180deg, rgba(254,252,232,.96), rgba(255,255,255,.90));
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: transform var(--transition), background-color var(--transition), color var(--transition), box-shadow var(--transition), border-color var(--transition), filter var(--transition);
    outline: 1px solid rgba(91,33,182,.35);
    outline-offset: 2px;
    box-shadow: 0 1px 0 rgba(17,24,39,.18), 0 10px 22px rgba(91,33,182,.12);
}
a:not([class]) {
    color: var(--color-primary);
    transition: color var(--transition), text-shadow var(--transition), filter var(--transition);
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
    text-shadow: 0 0 0 rgba(0,0,0,0);
}
a:not([class]):focus { outline: 2px solid rgba(34,197,94,.55); outline-offset: 3px; }

a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 18px rgba(34,197,94,.30); }

/* ========== 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); }
                .news-grid > * {
                    border-radius: var(--radius-lg);
                    box-shadow: 0 1px 0 rgba(17,24,39,.18), 0 12px 26px rgba(91,33,182,.10);
                    border: 1px solid rgba(17,24,39,.10);
                    background: linear-gradient(135deg, rgba(91,33,182,.08), rgba(34,197,94,.06));
                    transition: box-shadow var(--transition), transform var(--transition), filter var(--transition), background var(--transition);
                }

/* features: horizontal */
/* 水平滚动 */
                .feature-list { display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; }
                .feature-list > * { flex: 0 0 300px; scroll-snap-align: start; border-radius: var(--radius-sm); border: 1px solid rgba(91,33,182,.22); background: linear-gradient(180deg, rgba(17,24,39,.04), rgba(91,33,182,.06)); box-shadow: 0 1px 0 rgba(17,24,39,.16), 0 8px 20px rgba(91,33,182,.10); transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition); }
                .feature-list > *:hover { border-color: rgba(34,197,94,.45); box-shadow: 0 2px 0 rgba(17,24,39,.14), 0 14px 30px rgba(34,197,94,.18); transform: translateY(-1px); }

/* hero: left-aligned */
.hero-content { text-align: left; max-width: 600px; }

/* testimonials: stacked */
/* 垂直堆叠 */
                .testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; }
                .testimonial-list > * {
                    border-radius: var(--radius-md);
                    border: 1px solid rgba(34,197,94,.22);
                    background: linear-gradient(135deg, rgba(34,197,94,.10), rgba(91,33,182,.08));
                    box-shadow: 0 1px 0 rgba(17,24,39,.16), 0 10px 22px rgba(34,197,94,.12);
                    transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
                }

/* partners: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 20s linear infinite; }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }
                .partner-grid > * { border-radius: var(--radius-sm); border: 1px solid rgba(91,33,182,.18); background: linear-gradient(180deg, rgba(91,33,182,.07), rgba(17,24,39,.03)); box-shadow: 0 1px 0 rgba(17,24,39,.14), 0 10px 20px rgba(91,33,182,.08); }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }
.faq-list > * { border-radius: var(--radius-md); border: 1px solid rgba(17,24,39,.12); background: linear-gradient(180deg, rgba(255,255,255,.92), rgba(91,33,182,.06)); box-shadow: 0 1px 0 rgba(17,24,39,.14), 0 12px 26px rgba(91,33,182,.10); }

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }
.stats-grid > * {
    border-radius: var(--radius-md);
    border: 1px solid rgba(34,197,94,.22);
    background: linear-gradient(135deg, rgba(34,197,94,.10), rgba(91,33,182,.06));
    box-shadow: 0 1px 0 rgba(17,24,39,.14), 0 12px 28px rgba(34,197,94,.10);
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }
.cta-inner .card, .cta-inner [class*="card"] {
    border-radius: var(--radius-xl);
    border: 1px solid rgba(91,33,182,.26);
    background: radial-gradient(700px 240px at 20% 0%, rgba(34,197,94,.14), transparent 55%), radial-gradient(520px 220px at 90% 15%, rgba(91,33,182,.16), transparent 52%), linear-gradient(180deg, rgba(255,255,255,.92), rgba(254,252,232,.84));
    box-shadow: 0 1px 0 rgba(17,24,39,.18), 0 16px 44px rgba(91,33,182,.16), 0 0 0 1px rgba(34,197,94,.18) inset;
}

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
            .page-main { max-width: 1200px; margin: 0 auto; }

/* 条件性装饰 */
.hero, [class*="hero"], section:first-of-type {
    background: linear-gradient(105deg, #0b1220 0%, rgba(17,24,39,.98) 32%, rgba(91,33,182,.22) 64%, rgba(34,197,94,.18) 100%);
    border-bottom: 1px solid rgba(34,197,94,.18);
    box-shadow: 0 1px 0 rgba(255,255,255,.06) inset;
}
header, .header, .navbar {
    box-shadow: 0 1px 0 rgba(17,24,39,.22), 0 16px 40px rgba(91,33,182,.12), 0 0 0 1px rgba(34,197,94,.10) inset;
    backdrop-filter: saturate(130%) blur(6px);
    -webkit-backdrop-filter: saturate(130%) blur(6px);
}

/* 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; }
    .partner-grid { filter: saturate(112%); }
}
@media (max-width: 640px) {
    :root { --space-section: 2rem; --space-card: 1rem; --space-gap: 0.75rem; --transition: 260ms cubic-bezier(0.2, 1, 0.2, 1); --radius-md: 3px; --radius-lg: 5px; --radius-xl: 7px; }
    .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; }
    header, .header, .navbar { backdrop-filter: blur(5px); -webkit-backdrop-filter: blur(5px); box-shadow: 0 1px 0 rgba(17,24,39,.20), 0 10px 26px rgba(91,33,182,.10), 0 0 0 1px rgba(34,197,94,.10) inset; }
}