/* CSSVariantEngine v3.0 — go-mahjong.com.cn */
/* Palette: gradient-strips | Radius: soft rounded | Shadow: layered glow */
/* Spacing: generous vertical | Transition: smooth long */
/* Section layouts: {"news":"featured-top","features":"centered","hero":"centered","testimonials":"stacked","partners":"centered","faq":"two-column","stats":"grid-3","cta":"centered"} */

:root {
    --color-primary: #0d9488;
    --color-primary-dark: #0f766e;
    --color-accent: #f97316;
    --color-surface: linear-gradient(135deg, #fffbeb 0%, #fef9c3 100%);
    --color-text: #1e293b;
    --rgb-primary: 13, 148, 136;
    --rgb-accent: 249, 115, 22;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --shadow-sm: 0 2px 10px rgba(13, 148, 136, 0.1), 0 1px 4px rgba(30, 41, 59, 0.07);
    --shadow-md: 0 8px 20px rgba(13, 148, 136, 0.14), 0 4px 8px rgba(30, 41, 59, 0.09);
    --shadow-lg: 0 16px 36px rgba(13, 148, 136, 0.17), 0 8px 16px rgba(30, 41, 59, 0.11);
    --space-section: 3.6rem;
    --space-card: 1.5rem;
    --space-gap: 1.2rem;
    --transition: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 700;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(to bottom, #ffffff 0%, #f8fafc 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
section:nth-child(even) { background: linear-gradient(180deg, #fef3c7 0%, #fff7ed 100%); }
section:nth-child(odd):not(:first-child):not(:last-child) { background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%); color: #f8fafc; }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); background: linear-gradient(145deg, #ffffff 0%, #fefefe 100%); border: 2px solid transparent; border-image: linear-gradient(135deg, #0d9488 0%, #f97316 100%) 1; }
.card:hover, [class*="card"]:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%); color: white; border: none; }
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover { filter: brightness(1.1); box-shadow: 0 8px 24px rgba(var(--rgb-primary), 0.3); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 2px rgba(var(--rgb-accent), 0.2); }

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

/* news: featured-top */
/* 首篇横跨全宽 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
                .news-grid > *:first-child { grid-column: span 3; }

/* 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: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; }

/* testimonials: stacked */
/* 垂直堆叠 */
                .testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; }

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }

/* 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; }

/* cta: centered */
.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; }

/* 条件性装饰 */
header, .header, .navbar { box-shadow: 0 4px 12px rgba(13, 148, 136, 0.1), 0 2px 6px rgba(30, 41, 59, 0.06); background: linear-gradient(to right, #ffffff 0%, #f0fdfa 100%); }

/* 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: 2.4rem; --space-card: 1.2rem; --space-gap: 0.9rem; }
    .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; }
}