/* CSSVariantEngine v3.0 — yunkaidianjing.org.cn */
/* Palette: teal-cream | Radius: soft rounded | Shadow: multi-layer gradient tinted */
/* Spacing: strip-aligned spacious | Transition: long smooth */
/* Section layouts: {"news":"featured-top","features":"grid-3","hero":"overlay","testimonials":"stacked","partners":"grid-4","faq":"with-sidebar","stats":"big-number","cta":"full-bg"} */

:root {
    --color-primary: #0f766e;
    --color-primary-dark: #0d5d56;
    --color-accent: #14b8a6;
    --color-surface: #fffbeb;
    --color-text: #134e4a;
    --rgb-primary: 15, 118, 110;
    --rgb-accent: 20, 184, 166;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --shadow-sm: 0 2px 4px rgba(var(--rgb-primary), 0.06), 0 1px 2px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 4px 12px rgba(var(--rgb-primary), 0.1), 0 2px 6px rgba(var(--rgb-accent), 0.08);
    --shadow-lg: 0 8px 24px rgba(var(--rgb-primary), 0.12), 0 4px 12px rgba(var(--rgb-accent), 0.1), 0 2px 6px rgba(0, 0, 0, 0.05);
    --space-section: 5.5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
    --heading-weight: 600;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(180deg, #ffffff 0%, var(--color-surface) 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 1px 2px rgba(var(--rgb-primary), 0.05); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); background-attachment: fixed; }
.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 0%, #fffdf7 100%); border: 1px solid transparent; border-image: linear-gradient(135deg, rgba(var(--rgb-accent), 0.25), rgba(var(--rgb-primary), 0.15)) 1 stretch; }
.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: #ffffff; border: none; box-shadow: var(--shadow-sm); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

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

/* hero: overlay */
/* 全屏背景+文字覆盖 */
                .hero { position: relative; min-height: 70vh; display: flex; align-items: center; background: radial-gradient(ellipse at top left, var(--color-surface) 0%, #f0fdfa 50%, #ccfbf1 100%); }
                .hero-content { position: relative; z-index: 1; }

/* 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-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }

/* 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-dark) 0%, var(--color-accent) 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* cta: full-bg */
.cta-section { background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 40%, var(--color-accent) 100%); color: #fff; padding: 4rem 2rem; box-shadow: inset 0 2px 20px rgba(0,0,0,0.1), inset 0 -2px 20px rgba(255,255,255,0.1); }

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

/* 条件性装饰 */
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 4px rgba(var(--rgb-accent), 0.3); }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.btn:hover { filter: brightness(1.1); box-shadow: var(--shadow-lg); }

/* 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; }
}