/* CSSVariantEngine v3.0 — fengwoVPN.com.cn */
/* Palette: sidebar-classic cyan glow | Radius: medium rounded | Shadow: glow-effects */
/* Spacing: balanced | Transition: smooth ease */
/* Section layouts: {"news":"masonry-2","features":"grid-3","hero":"left-aligned","testimonials":"masonry","partners":"centered","faq":"with-sidebar","stats":"inline","cta":"split"} */

@keyframes subtle-pulse {
    0%, 100% { box-shadow: 0 0 16px rgba(var(--rgb-accent), 0.3); }
    50% { box-shadow: 0 0 28px rgba(var(--rgb-accent), 0.5); }
}

:root {
    --color-primary: #0ea5e9;
    --color-primary-dark: #0284c7;
    --color-accent: #38bdf8;
    --color-surface: #f8fafc;
    --color-text: #0f172a;
    --rgb-primary: 14, 165, 233;
    --rgb-accent: 56, 189, 248;
    --radius-sm: 8px;
    --radius-md: 10px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --shadow-sm: 0 0 12px rgba(var(--rgb-primary), 0.2);
    --shadow-md: 0 0 24px rgba(var(--rgb-primary), 0.4);
    --shadow-lg: 0 0 32px rgba(var(--rgb-primary), 0.5);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.3s ease-out;
    --heading-weight: 700;
    --body-line-height: 1.7;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background-color: 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-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); background-color: #ffffff; border: 1px solid rgba(var(--rgb-accent), 0.1); }
.card:hover { box-shadow: 0 0 32px rgba(var(--rgb-accent), 0.6); transform: translateY(-2px); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background-color: var(--color-primary); color: white; border: none; }
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover { box-shadow: 0 0 32px rgba(var(--rgb-accent), 0.6); animation: subtle-pulse 2s infinite; }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 8px rgba(var(--rgb-accent), 0.5); }

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

/* news: masonry-2 */
/* 两列瀑布流 */
                .news-grid { column-count: 2; column-gap: var(--space-gap); }
                .news-grid .card { break-inside: avoid; margin-bottom: var(--space-gap); }

/* features: grid-3 */
.feature-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

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

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

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
.partner-grid > * { filter: grayscale(0.7) brightness(1.1); transition: var(--transition); }
.partner-grid > *:hover { filter: grayscale(0) brightness(1); filter: drop-shadow(0 0 16px rgba(var(--rgb-accent), 0.6)); }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }
                .faq-wrapper > *:last-child { background-color: #252e3a; color: #f1f5f9; border-radius: var(--radius-xl); padding: var(--space-card); box-shadow: 0 0 24px rgba(14, 165, 233, 0.4); }

/* stats: inline */
/* 水平排列 */
                .stats-grid { display: flex; justify-content: center; gap: 3rem; }
                .stats-grid > * { text-align: center; padding: 1.5rem 2rem; border-radius: var(--radius-lg); background-color: white; box-shadow: var(--shadow-sm); transition: var(--transition); }
                .stats-grid > *:hover { box-shadow: var(--shadow-md); }

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; background: linear-gradient(135deg, #252e3a 0%, #0f172a 100%); padding: 3rem; border-radius: var(--radius-xl); color: white; }

/* 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-left: 3px solid var(--color-accent); }

/* 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; }
}