/* CSSVariantEngine v3.0 — zh-go-hongyunchess.com.cn */
/* Palette: teal-cyan glow | Radius: medium rounded | Shadow: accent glow */
/* Spacing: symmetric uniform | Transition: smooth easing */
/* Section layouts: {"news":"masonry-2","features":"centered","hero":"overlay","testimonials":"carousel","partners":"grid-6","faq":"two-column","stats":"grid-3","cta":"full-bg"} */

@keyframes softPulse {
    0% { box-shadow: 0 0 22px rgba(var(--rgb-accent), 0.35), 0 3px 6px rgba(var(--rgb-primary), 0.09); }
    50% { box-shadow: 0 0 28px rgba(var(--rgb-accent), 0.45), 0 3px 6px rgba(var(--rgb-primary), 0.09); }
    100% { box-shadow: 0 0 22px rgba(var(--rgb-accent), 0.35), 0 3px 6px rgba(var(--rgb-primary), 0.09); }
}

:root {
    --color-primary: #0d9488;
    --color-primary-dark: #134e4a;
    --color-accent: #22d3ee;
    --color-surface: #f0fdfa;
    --color-text: #0f766e;
    --rgb-primary: 13,148,136;
    --rgb-accent: 34,211,238;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --shadow-sm: 0 0 12px rgba(var(--rgb-accent), 0.15), 0 2px 4px rgba(var(--rgb-primary), 0.07);
    --shadow-md: 0 0 24px rgba(var(--rgb-accent), 0.4), 0 4px 8px rgba(var(--rgb-primary), 0.1);
    --shadow-lg: 0 0 32px rgba(var(--rgb-accent), 0.5), 0 8px 16px rgba(var(--rgb-primary), 0.12);
    --space-section: 3.1rem;
    --space-card: 1.3rem;
    --space-gap: 1.5rem;
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 800;
    --body-line-height: 1.7;
    --accent-glow: 0 0 24px rgba(var(--rgb-accent), 0.4);
    --accent-halo: 0 0 32px rgba(var(--rgb-accent), 0.6);
}

/* 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); animation: softPulse 3.5s ease-in-out infinite; background-color: #ffffff; }
.card:hover { box-shadow: var(--accent-halo), 0 6px 12px rgba(var(--rgb-primary), 0.15); 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: 1px solid rgba(var(--rgb-accent), 0.2); }
.btn:hover { box-shadow: var(--accent-halo); background-color: var(--color-accent); color: #0f172a; }
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), 0.6); }

/* ========== 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: centered */
/* 居中大卡片 */
.feature-list { display: flex; flex-direction: column; align-items: center; gap: calc(var(--space-gap) * 2); max-width: 720px; margin: 0 auto; }

/* hero: overlay */
/* 全屏背景+文字覆盖 */
.hero { position: relative; min-height: 70vh; display: flex; align-items: center; background: linear-gradient(180deg, rgba(var(--rgb-primary), 0.05) 0%, rgba(var(--rgb-accent), 0.08) 100%); }
.hero-content { position: relative; z-index: 1; }

/* testimonials: carousel */
/* 单条轮播 */
.testimonial-list { display: flex; overflow: hidden; } 
.testimonial-list > * { flex: 0 0 100%; }

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }
.partner-grid > * { border-radius: var(--radius-sm); background-color: white; padding: 1rem; box-shadow: var(--shadow-sm); transition: var(--transition); }
.partner-grid > *:hover { box-shadow: var(--accent-glow); }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }
.stats-grid .card { background-color: rgba(255,255,255,0.9); }

/* cta: full-bg */
.cta-section { background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%); color: #ffffff; padding: 4rem 2rem; box-shadow: inset 0 0 60px rgba(255,255,255,0.1); }

/* Page Layout: wide */
/* 超宽 */
.page-main { max-width: 1400px; margin: 0 auto; }

/* 条件性装饰 */
.card { border: 1px solid rgba(var(--rgb-accent), 0.12); }

/* 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; }
}