:root {
    --color-primary: #0ea5e9;
    --color-primary-dark: #0284c7;
    --color-accent: #d946ef;
    --color-surface: #1e293b;
    --color-text: #f1f5f9;
    --rgb-primary: 14,165,233;
    --rgb-accent: 217,70,239;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 22px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.4), 0 0 8px rgba(var(--rgb-accent), 0.15);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.5), 0 0 16px rgba(var(--rgb-accent), 0.2);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.6), 0 0 32px rgba(var(--rgb-accent), 0.3);
    --space-section: 5.5rem;
    --space-card: 2.2rem;
    --space-gap: 1.6rem;
    --transition: 0.4s cubic-bezier(0.2, 0.9, 0.4, 1);
    --heading-weight: 600;
    --body-line-height: 1.75;
}

@keyframes pulse-glow {
    0%, 100% { box-shadow: var(--shadow-md), 0 0 20px rgba(var(--card-accent-rgb, var(--rgb-accent)), 0.3); }
    50% { box-shadow: var(--shadow-md), 0 0 28px rgba(var(--card-accent-rgb, var(--rgb-accent)), 0.5); }
}

/* 基础覆盖 */
body { background-color: #0a0f1a; color: var(--color-text); line-height: var(--body-line-height); }
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), 0 0 20px rgba(var(--card-accent-rgb, var(--rgb-accent)), 0.3); padding: var(--space-card); transition: var(--transition); background: rgba(30, 41, 59, 0.7); backdrop-filter: blur(12px); animation: pulse-glow 4s ease-in-out infinite; }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

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

/* news: featured-top */
/* 首篇横跨全宽 */
                .news-grid { --card-accent: #38bdf8; --card-accent-rgb: 56,189,248; display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
                .news-grid > *:first-child { grid-column: span 3; }

/* features: grid-4 */
.feature-list { --card-accent: #a78bfa; --card-accent-rgb: 167,139,250; display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }

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

/* testimonials: masonry */
.testimonial-list { --card-accent: #f472b6; --card-accent-rgb: 244,114,182; column-count: 2; column-gap: var(--space-gap); }
                .testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }

/* partners: grid-4 */
.partner-grid { --card-accent: #34d399; --card-accent-rgb: 52,211,153; display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }

/* faq: two-column */
.faq-list { --card-accent: #fbbf24; --card-accent-rgb: 251,191,36; display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }

/* stats: big-number */
/* 大数字居中 */
                .stats-grid { --card-accent: #f87171; --card-accent-rgb: 248,113,113; display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
                .stats-grid .stat-value { font-size: 3rem; }

/* cta: card-style */
.cta-inner { --card-accent: #22d3ee; --card-accent-rgb: 34,211,238; background: linear-gradient(135deg, rgba(var(--card-accent-rgb), 0.2), rgba(var(--card-accent-rgb), 0.05)); border-radius: var(--radius-xl); padding: 3rem; text-align: center; }

/* Page Layout: narrow-centered */
/* 窄版居中 */
            .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), 0 0 32px rgba(var(--card-accent-rgb, var(--rgb-accent)), 0.6); animation: none; }
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(135deg, #0ea5e9, #d946ef); }
.card { border-left: 3px solid var(--card-accent, var(--color-accent)); }
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: 2.2rem; --space-card: 1.1rem; --space-gap: 0.8rem; }
    .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; }
}