:root {
    --color-primary: #0d9488;
    --color-primary-dark: #0f766e;
    --color-accent: #fbbf24;
    --color-surface: #fef3c7;
    --color-text: #1e293b;
    --rgb-primary: 13,148,136;
    --rgb-accent: 251,191,36;
    --radius-sm: 10px;
    --radius-md: 20px;
    --radius-lg: 30px;
    --radius-xl: 40px;
    --shadow-sm: 0 3px 6px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 10px 25px rgba(0,0,0,0.12), 0 4px 6px rgba(0,0,0,0.05);
    --shadow-lg: 0 20px 40px rgba(0,0,0,0.2), 0 8px 16px rgba(0,0,0,0.1);
    --space-section: 4.5rem;
    --space-card: 1.75rem;
    --space-gap: 1.5rem;
    --transition: 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
    --heading-weight: 600;
    --body-line-height: 1.7;
}

/* CSSVariantEngine v3.0 — web-world-xingkongsports.com */
/* Palette: teal/amber | Radius: rounded | Shadow: layered */
/* Spacing: comfortable | Transition: smooth */
/* Section layouts: {"news":"grid-3","features":"horizontal","hero":"left-aligned","testimonials":"stacked","partners":"grid-6","faq":"two-column","stats":"inline","cta":"card-style"} */

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background: repeating-linear-gradient(180deg,
        #ffffff 0%, #ffffff 25%,
        #fef3c7 25%, #fef3c7 50%,
        #0d9488 50%, #0d9488 75%,
        #ffffff 75%, #ffffff 100%);
    background-size: 100% 80vh;
    background-attachment: fixed;
}

h1, h2, h3, h4 {
    font-weight: var(--heading-weight);
    color: transparent;
    background-clip: text;
    background-image: linear-gradient(135deg, var(--color-primary-dark), var(--color-accent));
}

section, .section {
    padding-top: var(--space-section);
    padding-bottom: var(--space-section);
    box-shadow: inset 0 -2px 4px rgba(0,0,0,0.05), inset 0 2px 4px rgba(255,255,255,0.1);
}

.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--space-card);
    transition: var(--transition);
    background: linear-gradient(135deg, #ffffff, var(--color-surface));
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: white;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

a:not([class]) {
    color: transparent;
    background-clip: text;
    background-image: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    transition: var(--transition);
}

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

/* news: grid-3 */
/* 三列等宽网格 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); background: linear-gradient(135deg, #ffffff, var(--color-surface)); border-radius: var(--radius-md); padding: var(--space-card); }

/* features: horizontal */
/* 水平滚动 */
                .feature-list { display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; background: linear-gradient(90deg, var(--color-primary), var(--color-accent)); border-radius: var(--radius-lg); padding: var(--space-card); }
                .feature-list > * { flex: 0 0 300px; scroll-snap-align: start; }

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

/* testimonials: stacked */
/* 垂直堆叠 */
                .testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; background: linear-gradient(180deg, #ffffff, var(--color-surface)); border-radius: var(--radius-xl); padding: var(--space-card); }

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; background: linear-gradient(135deg, var(--color-surface), #ffffff); border-radius: var(--radius-md); padding: var(--space-card); }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); background: linear-gradient(135deg, #ffffff, var(--color-surface)); border-radius: var(--radius-md); padding: var(--space-card); }

/* stats: inline */
/* 水平排列 */
                .stats-grid { display: flex; justify-content: center; gap: 3rem; background: linear-gradient(180deg, var(--color-primary-dark), var(--color-primary)); border-radius: var(--radius-lg); padding: var(--space-card); color: white; }

/* cta: card-style */
.cta-inner { background: linear-gradient(135deg, var(--color-surface), #ffffff); border-radius: var(--radius-xl); padding: 3rem; text-align: center; box-shadow: var(--shadow-lg); }

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
            .page-main { max-width: 1200px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); background: linear-gradient(135deg, var(--color-surface), #ffffff); }
header, .header, .navbar { box-shadow: 0 4px 8px rgba(0,0,0,0.1); background: linear-gradient(180deg, var(--color-primary-dark), var(--color-primary)); }

/* 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; }
}