/* CSSVariantEngine v3.0 — zrg4-huatihuitiyu.com.cn */
/* Palette: ink-cream | Radius: sharp | Shadow: hard-offset */
/* Spacing: balanced | Transition: snappy */
/* Section layouts: {"news":"list-view","features":"grid-3","hero":"overlay","testimonials":"stacked","partners":"grid-4","faq":"with-sidebar","stats":"grid-4","cta":"full-bg"} */

:root {
    --color-primary: #1e293b;
    --color-primary-dark: #0f172a;
    --color-accent: #f59e0b;
    --color-surface: #faf6ef;
    --color-text: #1c1917;
    --rgb-primary: 30,41,59;
    --rgb-accent: 245,158,11;
    --radius-sm: 0;
    --radius-md: 0;
    --radius-lg: 0;
    --radius-xl: 2px;
    --shadow-sm: 2px 2px 0px 0px #334155;
    --shadow-md: 4px 4px 0px 0px #334155;
    --shadow-lg: 6px 6px 0px 0px #334155;
    --space-section: 3.5rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 700;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background: var(--color-surface);
    accent-color: var(--color-accent);
    caret-color: var(--color-accent);
}

h1, h2, h3, h4 { font-weight: var(--heading-weight); }

section, .section {
    padding-top: var(--space-section);
    padding-bottom: var(--space-section);
    background: var(--color-surface);
    box-shadow: inset 0 -3px 0 rgba(30, 41, 59, 0.2);
}

.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md), 0 0 0 2px var(--color-primary);
    padding: var(--space-card);
    transition: var(--transition);
    background: #ffffff;
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-decoration-color: var(--color-accent);
}

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

/* news: list-view */
/* 列表模式 (图左文右) */
.news-grid { display: flex; flex-direction: column; gap: var(--space-gap); }
.news-grid .card { display: grid; grid-template-columns: 280px 1fr; }

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

/* cta: full-bg */
.cta-section {
    background: var(--color-accent);
    color: var(--color-primary-dark);
    padding: 4rem 2rem;
    box-shadow: inset 0 0 0 3px var(--color-primary);
}

/* 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(-2px);
    box-shadow: var(--shadow-lg), 0 0 0 2px var(--color-primary);
}

.hero, [class*="hero"], section:first-of-type {
    background: linear-gradient(160deg, #0f172a 0%, #1e293b 65%, #334155 100%);
    color: var(--color-surface);
    text-shadow: 2px 2px 0px rgba(15, 23, 42, 0.8);
}

/* 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; }
}