/* CSSVariantEngine v3.0 — m4-panda-sports.com.cn */
/* Palette: mosaic-vibrant | Radius: medium | Shadow: glow */
/* Spacing: tight | Transition: spring */
/* Section layouts: {"news":"featured-left","features":"grid-3","hero":"left-aligned","testimonials":"stacked","partners":"centered","faq":"single-column","stats":"grid-4","cta":"centered"} */

:root {
    --color-primary: #4338ca;
    --color-primary-dark: #1e1b4b;
    --color-accent: #f59e0b;
    --color-surface: #f7f4ef;
    --color-text: #1c1917;
    --rgb-primary: 67,56,202;
    --rgb-accent: 245,158,11;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --shadow-sm: 0 2px 6px rgba(30,27,75,.08), 0 0 10px rgba(67,56,202,.06);
    --shadow-md: 0 8px 20px rgba(30,27,75,.12), 0 0 16px rgba(67,56,202,.10);
    --shadow-lg: 0 16px 32px rgba(30,27,75,.14), 0 0 24px rgba(67,56,202,.16);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.875rem;
    --transition: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    --heading-weight: 800;
    --body-line-height: 1.75;
}

/* 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);
    color: var(--color-primary-dark);
    text-shadow: 0 0 18px rgba(var(--rgb-accent), .12);
}

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 24px var(--glow-color, rgba(var(--rgb-accent), .25));
    padding: var(--space-card);
    transition: var(--transition);
    background: var(--card-gradient, linear-gradient(135deg, #ffffff, #f4f4f5));
    animation: cardGlowPulse 4s ease-in-out infinite;
}

@keyframes cardGlowPulse {
    0%, 100% { box-shadow: var(--shadow-md), 0 0 18px var(--glow-color, rgba(var(--rgb-accent), .2)); }
    50% { box-shadow: var(--shadow-md), 0 0 36px var(--glow-color, rgba(var(--rgb-accent), .5)); }
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow: 0 4px 14px rgba(var(--rgb-accent), .35);
    text-shadow: 0 1px 2px rgba(0,0,0,.08);
}

a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-decoration-color: var(--color-accent);
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
}

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

/* news: featured-left */
/* 左大右小 (1大+2小) */
.news-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    grid-template-rows: auto auto;
    gap: var(--space-gap);
    --glow-color: rgba(239,68,68,.45);
    --card-gradient: linear-gradient(135deg, #ffffff, #ffe4e6);
    background: radial-gradient(circle at 10% 20%, rgba(239,68,68,.08), transparent 45%);
}

.news-grid > *:first-child {
    grid-row: span 2;
}

/* features: grid-3 */
.feature-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-gap);
    --glow-color: rgba(245,158,11,.45);
    --card-gradient: linear-gradient(135deg, #ffffff, #fef3c7);
    background: radial-gradient(circle at 90% 10%, rgba(245,158,11,.08), transparent 50%);
}

/* hero: left-aligned */
.hero-content {
    text-align: left;
    max-width: 600px;
    --glow-color: rgba(236,72,153,.4);
    --card-gradient: linear-gradient(135deg, #ffffff, #fce7f3);
    background: radial-gradient(circle at 0% 50%, rgba(236,72,153,.08), transparent 40%);
    border-radius: var(--radius-xl);
}

/* testimonials: stacked */
/* 垂直堆叠 */
.testimonial-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-gap);
    max-width: 720px;
    margin: 0 auto;
    --glow-color: rgba(16,185,129,.45);
    --card-gradient: linear-gradient(135deg, #ffffff, #d1fae5);
    background: radial-gradient(circle at 50% 50%, rgba(16,185,129,.06), transparent 60%);
}

/* partners: centered */
.partner-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    --glow-color: rgba(59,130,246,.45);
    --card-gradient: linear-gradient(135deg, #ffffff, #dbeafe);
    background: radial-gradient(circle at 50% 100%, rgba(59,130,246,.08), transparent 50%);
}

/* faq: single-column */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    --glow-color: rgba(139,92,246,.45);
    --card-gradient: linear-gradient(135deg, #ffffff, #ede9fe);
    background: radial-gradient(circle at 50% 0%, rgba(139,92,246,.08), transparent 55%);
}

/* stats: grid-4 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-gap);
    text-align: center;
    --glow-color: rgba(236,72,153,.45);
    --card-gradient: linear-gradient(135deg, #ffffff, #fce7f3);
    background: radial-gradient(circle at 50% 0%, rgba(236,72,153,.08), transparent 50%);
}

/* cta: centered */
.cta-inner {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
    --glow-color: rgba(20,184,166,.45);
    --card-gradient: linear-gradient(135deg, #ffffff, #ccfbf1);
}

/* Page Layout: narrow-centered */
/* 窄版居中 */
.page-main {
    max-width: 860px;
    margin: 0 auto;
}

/* 条件性装饰 */
header, .header, .navbar {
    background: rgba(255,255,255,.65);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    box-shadow: 0 4px 20px rgba(30,27,75,.08);
}

/* 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: 0.875rem; }
    .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; }
}