:root {
    --color-primary: #1D4ED8;
    --color-primary-dark: #1E40AF;
    --color-accent: #F97316;
    --color-surface: #F8FAFC;
    --color-text: #0F172A;
    --rgb-primary: 29,78,216;
    --rgb-accent: 249,115,22;
    --radius-sm: 0px;
    --radius-md: 2px;
    --radius-lg: 3px;
    --radius-xl: 4px;
    --shadow-sm: 3px 3px 0px rgba(15, 23, 42, 0.18);
    --shadow-md: 4px 4px 0px rgba(2, 6, 23, 0.22), 7px 8px 18px rgba(2, 6, 23, 0.10);
    --shadow-lg: 4px 4px 0px rgba(2, 6, 23, 0.26), 10px 12px 26px rgba(2, 6, 23, 0.14);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.15s cubic-bezier(0.2, 0.9, 0.15, 1);
    --heading-weight: 600;
    --body-line-height: 1.65;
    --border-strong: rgba(2, 6, 23, 0.22);
    --focus-ring: rgba(37, 99, 235, 0.35);
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: 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: var(--shadow-md);
    padding: var(--space-card);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background-color var(--transition), color var(--transition);
    border: 2px solid var(--border-strong);
    background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: background-color var(--transition), color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
    border: 2px solid rgba(2, 6, 23, 0.18);
    box-shadow: 3px 3px 0px rgba(2, 6, 23, 0.14);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-thickness: 2px; text-underline-offset: 3px; }

.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

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

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

.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
                .testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }

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

.faq-list { max-width: 800px; margin: 0 auto; }

.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }

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

            .page-main { max-width: 860px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(2, 6, 23, 0.32);
}
a:not([class]):hover { color: var(--color-accent); }
.hero, [class*="hero"], section:first-of-type {
    background:
      radial-gradient(1200px 500px at 15% 10%, rgba(249,115,22,0.35) 0%, rgba(249,115,22,0.00) 55%),
      radial-gradient(900px 380px at 85% 20%, rgba(29,78,216,0.38) 0%, rgba(29,78,216,0.00) 60%),
      linear-gradient(135deg, #1D4ED8 0%, #1E40AF 55%, #F97316 130%);
}
.card { border: 2px solid rgba(var(--rgb-primary), .28); }

header, .header, .navbar { background: transparent; }

/* 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; }
}