/* CSSVariantEngine v3.0 — shangniudianjing.org.cn */
/* Palette: ocean-gradient | Radius: soft-rounded | Shadow: multi-layer-harmonious */
/* Spacing: uniform-24px | Transition: smooth-0.5s */
/* Section layouts: {"news":"grid-3","features":"grid-3","hero":"centered","testimonials":"stacked","partners":"grid-6","faq":"single-column","stats":"grid-4","cta":"card-style"} */

:root {
    --color-primary: #0ea5e9;
    --color-primary-dark: #0369a1;
    --color-accent: #14b8a6;
    --color-surface: linear-gradient(135deg, #f0fdfa 0%, #e0f2fe 100%);
    --color-text: #0f172a;
    --rgb-primary: 14, 165, 233;
    --rgb-accent: 20, 184, 166;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 12px rgba(14, 165, 233, 0.08);
    --shadow-md: 0 8px 24px rgba(14, 165, 233, 0.12);
    --shadow-lg: 0 16px 48px rgba(20, 184, 166, 0.15);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1.5rem;
    --transition: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 700;
    --body-line-height: 1.75;
    accent-color: var(--color-primary);
    caret-color: var(--color-primary);
}

/* 基础覆盖 */
body { 
    color: var(--color-text); 
    line-height: var(--body-line-height); 
    background: linear-gradient(180deg, #f8fafc 0%, #ecfeff 100%);
}
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); 
    background: linear-gradient(145deg, #ffffff 0%, #f0f9ff 100%);
}
.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(145deg, #f0f9ff 0%, #ccfbf1 100%);
}
.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;
    box-shadow: var(--shadow-sm);
}
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover {
    box-shadow: var(--shadow-md);
    filter: brightness(1.08);
}
a:not([class]) { 
    color: var(--color-primary); 
    transition: var(--transition); 
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
}
a:not([class]):hover {
    color: var(--color-accent);
}

/* ========== 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); }

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

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

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: card-style */
.cta-inner { 
    background: linear-gradient(135deg, #0ea5e9 0%, #14b8a6 50%, #0d9488 100%); 
    border-radius: var(--radius-xl); 
    padding: 3rem; 
    text-align: center; 
    color: white;
    box-shadow: var(--shadow-lg);
}

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

/* 条件性装饰 */
.card { 
    border: 1px solid transparent; 
    border-image: linear-gradient(135deg, rgba(var(--rgb-primary), 0.2) 0%, rgba(var(--rgb-accent), 0.2) 100%) 1;
}
header, .header, .navbar { 
    box-shadow: 0 4px 16px rgba(14, 165, 233, 0.1), 0 1px 4px rgba(20, 184, 166, 0.06); 
    backdrop-filter: blur(12px) saturate(180%);
    background: linear-gradient(90deg, rgba(255,255,255,0.9) 0%, rgba(240,253,250,0.9) 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: 2rem; --space-card: 1rem; --space-gap: 1.125rem; }
    .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; }
}