:root {
    --color-primary: #8b5cf6;
    --color-primary-dark: #7c3aed;
    --color-accent: #f472b6;
    --color-surface: #f1f5f9;
    --color-text: #0f172a;
    --rgb-primary: 139,92,246;
    --rgb-accent: 244,114,182;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --shadow-sm: 0 1px 3px rgba(99,102,241,0.08), 0 1px 2px rgba(99,102,241,0.06);
    --shadow-md: 0 4px 6px -1px rgba(99,102,241,0.12), 0 2px 4px -2px rgba(99,102,241,0.08);
    --shadow-lg: 0 10px 15px -3px rgba(99,102,241,0.15), 0 4px 6px -4px rgba(99,102,241,0.1);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 600;
    --body-line-height: 1.6;
}

body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section {
    padding-top: var(--space-section);
    padding-bottom: var(--space-section);
    background: linear-gradient(180deg, var(--color-surface) 0%, #ffffff 100%);
}
.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--space-card);
    transition: var(--transition);
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(139,92,246,0.08);
    border-left: 3px solid transparent;
    position: relative;
}
.card:nth-child(odd) { border-left-color: var(--color-primary); }
.card:nth-child(even) { border-left-color: var(--color-accent); }

.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 2px 4px rgba(139,92,246,0.2);
}
a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-decoration-color: transparent;
    text-underline-offset: 2px;
}
a:not([class]):hover { text-decoration-color: currentColor; }

/* ========== 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; border-left: none; background: linear-gradient(135deg, #ffffff, #f1f5f9); }

.feature-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
.feature-list .card { background: linear-gradient(145deg, #ffffff, #f8fafc); border-left: 3px solid var(--color-primary); }

.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }
.hero-inner > * { background: linear-gradient(135deg, rgba(255,255,255,0.8), rgba(255,255,255,0.95)); backdrop-filter: blur(4px); }

.testimonial-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
.testimonial-list .card { background: linear-gradient(135deg, #ffffff, #fce7f3); border-left: 3px solid var(--color-accent); }

.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }
.partner-grid .card { background: rgba(255,255,255,0.5); backdrop-filter: blur(4px); border: 1px solid rgba(139,92,246,0.1); border-left: none; }

.faq-list { max-width: 800px; margin: 0 auto; }
.faq-list .card { background: linear-gradient(135deg, #ffffff, #faf5ff); border-left: 3px solid var(--color-primary); }

.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }
.stats-grid .card { background: linear-gradient(135deg, #ffffff, #e0e7ff); border-left: none; }

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

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

.card:hover, [class*="card"]:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}
.card { border-left: 3px solid var(--color-primary); }

/* 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; }
}