:root {
    --color-primary: #2d3142;
    --color-primary-dark: #1a1c29;
    --color-accent: #ef476f;
    --color-surface: #fcf6f2;
    --color-text: #1b1b1b;
    --rgb-primary: 45,49,66;
    --rgb-accent: 239,71,111;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 28px;
    --shadow-sm: 0 4px 12px rgba(45,49,66,.08);
    --shadow-md: 0 8px 24px rgba(45,49,66,.12);
    --shadow-lg: 0 16px 48px rgba(45,49,66,.15);
    --space-section: 6rem;
    --space-card: 2.4rem;
    --space-gap: 1.8rem;
    --transition: 0.5s cubic-bezier(.25,.46,.45,.94);
    --heading-weight: 700;
    --body-line-height: 1.65;
}

body { color: var(--color-text); line-height: var(--body-line-height); }
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); }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

/* ========== 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); background: #fff9f5; border-radius: var(--radius-lg); padding: var(--space-card); }
                .news-grid .card { display: grid; grid-template-columns: 280px 1fr; background: #ffffff; border-color: var(--color-accent); border-style: solid; }

/* features: horizontal */
/* 水平滚动 */
                .feature-list { display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; background: #f0ece4; border-radius: var(--radius-xl); padding: var(--space-card); }
                .feature-list > * { flex: 0 0 300px; scroll-snap-align: start; background: #ffffff; border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }

/* hero: minimal */
.hero { padding: 2rem 0; background: linear-gradient(135deg, #2d3142, #4a4e69); color: #fcf6f2; border-radius: 0 0 var(--radius-xl) var(--radius-xl); } .hero-content { max-width: 560px; }

/* testimonials: stacked */
/* 垂直堆叠 */
                .testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; background: #f0ece4; border-radius: var(--radius-xl); padding: var(--space-card); }
                .testimonial-list .card { background: #ffffff; border-left: 4px solid var(--color-accent); }

/* partners: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 20s linear infinite; background: #e8e4da; border-radius: var(--radius-lg); padding: 1.5rem 0; }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; background: #fcf6f2; border-radius: var(--radius-xl); padding: var(--space-card); }
                .faq-wrapper .card { background: #ffffff; border: 1px solid #e0d6c8; }

/* stats: inline */
/* 水平排列 */
                .stats-grid { display: flex; justify-content: center; gap: 3rem; background: #fff0eb; border-radius: var(--radius-xl); padding: 2.5rem 1rem; }
                .stats-grid .card { background: #ffffff; border-radius: var(--radius-md); padding: 1.5rem 2rem; box-shadow: var(--shadow-sm); }

/* cta: card-style */
.cta-inner { background: linear-gradient(135deg, #ef476f, #ff6b6b); border-radius: var(--radius-xl); padding: 3rem; text-align: center; color: #ffffff; }

/* 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(-4px); box-shadow: var(--shadow-lg); }
header, .header, .navbar { background: transparent; }

/* 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; }
}