:root {
    --color-primary: #e85d3f;
    --color-primary-dark: #c54428;
    --color-accent: #2a9d8f;
    --color-surface: #f4f1ea;
    --color-text: #22302b;
    --color-border: #22302b;
    --color-card: #fff8f0;
    --rgb-primary: 232,93,63;
    --rgb-accent: 42,157,143;
    --radius-sm: 0px;
    --radius-md: 2px;
    --radius-lg: 4px;
    --radius-xl: 6px;
    --shadow-sm: 0 0 0 1px var(--color-border), 2px 2px 0 var(--color-border);
    --shadow-md: 0 0 0 2px var(--color-border), 4px 4px 0 var(--color-border);
    --shadow-lg: 0 0 0 3px var(--color-border), 6px 6px 0 var(--color-border), 12px 12px 0 rgba(34,48,43,.08);
    --space-section: 5rem;
    --space-card: 1.75rem;
    --space-gap: 1.5rem;
    --transition: 0.15s cubic-bezier(.2,.8,.2,1);
    --heading-weight: 700;
    --body-line-height: 1.7;
}

body { color: var(--color-text); line-height: var(--body-line-height); background: var(--color-surface); }

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: var(--color-card); }

.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 */
.news-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-gap);
    --shadow-md: var(--shadow-lg);
    --color-primary: #f25c54;
    --color-accent: #f49cbb;
    --color-card: #ffe9e8;
}

.news-grid .card { display: grid; grid-template-columns: 280px 1fr; }

/* features: centered */
.feature-list {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: calc(var(--space-gap) * 2);
    max-width: 720px;
    margin: 0 auto;
    --shadow-md: var(--shadow-lg);
    --color-primary: #2a9d8f;
    --color-accent: #87c7b9;
    --color-card: #e4f4f1;
}

/* hero: centered */
.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    --color-primary: #e85d3f;
    --color-accent: #f4a261;
    --color-card: #fff3e8;
}

/* testimonials: stacked */
.testimonial-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-gap);
    max-width: 720px;
    margin: 0 auto;
    --shadow-md: var(--shadow-lg);
    --color-primary: #7b5cd6;
    --color-accent: #b49cf4;
    --color-card: #f0ebff;
}

/* partners: scroll */
.partner-grid {
    display: flex;
    gap: 2rem;
    overflow: hidden;
    animation: partnerScroll 20s linear infinite;
    --shadow-md: var(--shadow-sm);
    --color-primary: #e2a22e;
    --color-accent: #f4d58d;
    --color-card: #fff7e0;
}

@keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* faq: with-sidebar */
.faq-wrapper {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
    --shadow-md: var(--shadow-lg);
    --color-primary: #f06449;
    --color-accent: #ffb6a3;
    --color-card: #fff0ea;
}

/* stats: grid-3 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-gap);
    text-align: center;
    --shadow-md: var(--shadow-sm);
    --color-primary: #2f6d7a;
    --color-accent: #83c5be;
    --color-card: #e8f4f6;
}

/* cta: split */
.cta-inner {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 2rem;
    --shadow-md: var(--shadow-lg);
    --color-primary: #d64550;
    --color-accent: #ff9f68;
    --color-card: #ffeae8;
}

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

/* 条件性装饰 */
.card { border-left: 3px solid var(--color-primary); }

/* 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; }
}