:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #4c1d95;
    --color-accent: #06b6d4;
    --color-surface: #f8f9fc;
    --color-text: #1e1b4b;
    --rgb-primary: 124,58,237;
    --rgb-accent: 6,182,212;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --shadow-sm: 0 1px 3px rgba(124,58,237,.08), 0 1px 2px rgba(30,27,75,.06);
    --shadow-md: 0 4px 14px rgba(124,58,237,.12), 0 2px 6px rgba(6,182,212,.08), 0 1px 2px rgba(30,27,75,.05);
    --shadow-lg: 0 12px 40px rgba(124,58,237,.16), 0 4px 12px rgba(6,182,212,.10), 0 2px 4px rgba(30,27,75,.06);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 600;
    --body-line-height: 1.65;
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background: linear-gradient(160deg, #f8f9fc 0%, #eef1f8 40%, #e8ecf7 100%);
    background-attachment: fixed;
}
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: var(--shadow-md);
    padding: var(--space-card);
    transition: var(--transition);
    background: linear-gradient(145deg, #ffffff 0%, #fafbff 50%, #f3f5fe 100%);
    border: 1px solid transparent;
    background-clip: padding-box;
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    background: linear-gradient(135deg, #7c3aed 0%, #6d28d9 50%, #4c1d95 100%);
    color: #ffffff;
    border: 1px solid rgba(124,58,237,.3);
    box-shadow: 0 2px 8px rgba(124,58,237,.25), inset 0 1px 0 rgba(255,255,255,.15);
}
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 50%, #5b21b6 100%);
    box-shadow: 0 6px 20px rgba(124,58,237,.35), 0 2px 6px rgba(6,182,212,.15), inset 0 1px 0 rgba(255,255,255,.2);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); }
a:not([class]):hover { color: var(--color-accent); }

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

/* news: list-view */
/* 列表模式 (图左文右) */
                .news-grid { display: flex; flex-direction: column; gap: var(--space-gap); }
                .news-grid .card { display: grid; grid-template-columns: 280px 1fr; }

/* features: grid-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }
.feature-list .card {
    background: linear-gradient(160deg, #ffffff 0%, #f5f3ff 60%, #ede9fe 100%);
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius-xl);
}
.feature-list .card:hover {
    box-shadow: var(--shadow-lg);
    background: linear-gradient(160deg, #ffffff 0%, #f0edff 40%, #e4defc 100%);
}

/* hero: split */
/* 左文右图 */
                .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }

/* 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 .card {
                    background: linear-gradient(135deg, #fafbff 0%, #f0f4ff 50%, #e8eeff 100%);
                    box-shadow: 0 3px 12px rgba(124,58,237,.10), 0 1px 4px rgba(6,182,212,.06);
                    border-radius: var(--radius-xl);
                }

/* 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%); } }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }
.faq-list .card {
    background: linear-gradient(180deg, #ffffff 0%, #f8f7ff 70%, #f0effe 100%);
    border-radius: var(--radius-lg);
    box-shadow: 0 2px 10px rgba(124,58,237,.08), 0 1px 3px rgba(6,182,212,.05);
}

/* stats: inline */
/* 水平排列 */
                .stats-grid { display: flex; justify-content: center; gap: 3rem; }

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }
.cta-inner .btn, .cta-inner button[class*="btn"], .cta-inner a[class*="btn"] {
    background: linear-gradient(135deg, #06b6d4 0%, #7c3aed 50%, #4c1d95 100%);
    box-shadow: 0 4px 18px rgba(6,182,212,.30), 0 2px 8px rgba(124,58,237,.20), inset 0 1px 0 rgba(255,255,255,.18);
}
.cta-inner .btn:hover, .cta-inner button[class*="btn"]:hover, .cta-inner a[class*="btn"]:hover {
    background: linear-gradient(135deg, #22d3ee 0%, #8b5cf6 50%, #5b21b6 100%);
    box-shadow: 0 8px 28px rgba(6,182,212,.35), 0 4px 14px rgba(124,58,237,.25), inset 0 1px 0 rgba(255,255,255,.22);
}

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

/* 条件性装饰 */
.card { border: 1px solid rgba(124,58,237,.10); border-image: linear-gradient(135deg, rgba(124,58,237,.15), rgba(6,182,212,.10), rgba(124,58,237,.05)) 1; }
header, .header, .navbar {
    background: linear-gradient(180deg, rgba(248,249,252,.95) 0%, rgba(238,241,248,.85) 100%);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(124,58,237,.08);
}

/* 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; }
}