:root {
    --color-primary: #c44536;
    --color-primary-dark: #9f3023;
    --color-accent: #6b705c;
    --color-surface: #f4efe6;
    --color-text: #1a1a1a;
    --rgb-primary: 196, 69, 54;
    --rgb-accent: 107, 112, 92;
    --radius-sm: 0;
    --radius-md: 0;
    --radius-lg: 2px;
    --radius-xl: 4px;
    --shadow-sm: 3px 3px 0 0 #1a1a1a, 6px 6px 0 0 rgba(196, 69, 54, 0.12);
    --shadow-md: 4px 4px 0 0 #1a1a1a, 8px 8px 0 0 rgba(196, 69, 54, 0.1);
    --shadow-lg: 6px 6px 0 0 #1a1a1a, 12px 12px 0 0 rgba(107, 112, 92, 0.16);
    --space-section: 4.5rem;
    --space-card: 1.75rem;
    --space-gap: 1.5rem;
    --transition: 0.15s cubic-bezier(0.2, 0, 0, 1);
    --heading-weight: 800;
    --body-line-height: 1.75;
    accent-color: var(--color-primary);
    caret-color: var(--color-primary);
}

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

.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--space-card);
    transition: var(--transition);
    background-color: #fffaf1;
    outline: 2px solid var(--color-text);
    outline-offset: -2px;
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    outline: 1px solid var(--color-text);
    outline-offset: -1px;
}

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

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

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

/* features: grid-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }

/* hero: minimal */
.hero { padding: 2rem 0; } .hero-content { max-width: 560px; }

/* testimonials: carousel */
.testimonial-list { display: flex; overflow: hidden; } 
.testimonial-list > * { flex: 0 0 100%; }

/* partners: scroll */
.partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 28s linear infinite; }
@keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

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

/* stats: inline */
.stats-grid { display: flex; justify-content: center; gap: 3rem; }

/* cta: full-bg */
.cta-section { background: var(--color-primary); color: #f5f1e8; padding: 4rem 2rem; outline: 3px solid var(--color-text); outline-offset: -3px; }

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

/* 条件性装饰 */
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(135deg, #1a1a1a, #c44536 75%); color: var(--color-surface); }
.card { border-left: 3px double var(--color-accent); }
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: 2.25rem; --space-card: 1.125rem; --space-gap: 0.875rem; }
    .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; }
}