/* CSSVariantEngine v3.0 — bing01 template */
/* Palette: cyan-blue gradient | Radius: soft rounded | Shadow: dual-tone colored */
/* Spacing: symmetric 24px gap | Transition: smooth long curve */
/* Section layouts: {"news":"featured-left","features":"grid-4","hero":"centered","testimonials":"grid-3","partners":"grid-6","faq":"two-column","stats":"big-number","cta":"card-style"} */

:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1e40af;
    --color-accent: #06b6d4;
    --color-surface: #eff6ff;
    --color-text: #1e293b;
    --rgb-primary: 37,99,235;
    --rgb-accent: 6,182,212;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 10px rgba(var(--rgb-primary),.15), 0 1px 3px rgba(var(--rgb-accent),.08);
    --shadow-md: 0 6px 22px rgba(var(--rgb-primary),.12), 0 3px 9px rgba(var(--rgb-accent),.1);
    --shadow-lg: 0 12px 45px rgba(var(--rgb-primary),.1), 0 5px 18px rgba(var(--rgb-accent),.08);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.5rem;
    --transition: 0.55s cubic-bezier(0.25, 0.1, 0.25, 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: linear-gradient(180deg, #f8fafc 0%, #eff6ff 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card:not(.about-card):not(.stats-card):not(.whyus-card):not(.testimonial-card):not(.news-card-v2) { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); background: linear-gradient(180deg, #ffffff 0%, #f0f9ff 100%); }
.btn:not(.btn-close):not(.btn-light),
button[class*="btn"]:not(.btn-close):not(.btn-light),
a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent), #8b5cf6);
    background-size: 200% 100%;
    background-position: 0% 50%;
    color: #fff;
    border-color: transparent;
}
.btn:not(.btn-close):not(.btn-light):hover,
button[class*="btn"]:not(.btn-close):not(.btn-light):hover,
a[class*="btn"]:hover {
    color: #fff;
    filter: brightness(1.06);
}
.btn-warning,
a.btn-warning {
    color: #1e293b !important;
    background: linear-gradient(90deg, #fbbf24, #f59e0b) !important;
}
.btn-light,
button.btn-light {
    color: var(--color-text) !important;
    background: #f8f9fa !important;
    border-color: #dee2e6 !important;
}
.btn-outline-light,
a.btn-outline-light {
    color: #fff !important;
    background: transparent !important;
    border-color: rgba(255, 255, 255, 0.75) !important;
}
.btn-outline-light:hover,
a.btn-outline-light:hover {
    color: #fff !important;
    background-color: rgba(255, 255, 255, 0.15) !important;
}
.btn-outline-secondary,
a.btn-outline-secondary {
    color: var(--color-text) !important;
    background: #fff !important;
    border-color: #dee2e6 !important;
}
.header .btn-outline-primary,
.header a.btn-outline-primary {
    color: #fff !important;
    font-weight: 600;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.18);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

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

/* features: grid-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }

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

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

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }

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

/* stats: big-number */
/* 大数字居中 */
                .stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
                .stats-grid .stat-value { font-size: 3rem; background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* cta: card-style */
.cta-inner { background: radial-gradient(circle at top left, #dbeafe 0%, #e0f2fe 50%, #f0f9ff 100%); border-radius: var(--radius-xl); padding: 3rem; text-align: center; border: 2px solid transparent; border-image: linear-gradient(135deg, rgba(var(--rgb-primary), 0.3), rgba(var(--rgb-accent), 0.3), rgba(139,92,246,0.3)) 1 stretch; }

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

/* 条件性装饰 */
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(135deg, #1e40af 0%, #2563eb 30%, #0ea5e9 65%, #06b6d4 100%); }
.card { border: 1px solid transparent; border-image: linear-gradient(135deg, rgba(var(--rgb-primary), .15), rgba(var(--rgb-accent), .15), rgba(139,92,246,.15)) 1 stretch; }

/* 深色区块内的玻璃卡片：避免被全局 .card 白底覆盖 */
.about-section .about-card {
    background: rgba(255, 255, 255, 0.08) !important;
    border: 1px solid rgba(255, 255, 255, 0.14) !important;
    border-image: none !important;
    box-shadow: none !important;
    padding: var(--space-card);
    color: #fff;
}
.about-section .about-card:hover {
    background: rgba(255, 255, 255, 0.14) !important;
}

/* 首页热门资讯：三列区域加宽 */
.news-section .container {
    max-width: 1140px;
}

/* 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; }
}