:root {
    --color-primary: #c44536;
    --color-primary-dark: #a2362c;
    --color-accent: #6b705c;
    --color-surface: #f5f1e8;
    --color-text: #1a1a1a;
    --rgb-primary: 196,69,54;
    --rgb-accent: 107,112,92;
    --radius-sm: 0px;
    --radius-md: 2px;
    --radius-lg: 3px;
    --radius-xl: 4px;
    --shadow-sm: 4px 4px 0px rgba(26,26,26,.18);
    --shadow-md: 6px 6px 0px rgba(26,26,26,.22), 10px 12px 24px rgba(26,26,26,.14);
    --shadow-lg: 8px 8px 0px rgba(26,26,26,.24), 18px 18px 0px rgba(196,69,54,.10), 22px 26px 50px rgba(26,26,26,.18);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 0.15s cubic-bezier(0.2, 0.9, 0.2, 1);
    --heading-weight: 700;
    --body-line-height: 1.7;

    --color-border: #1a1a1a;
    --color-muted: rgba(26,26,26,.72);
    --color-ink-soft: rgba(26,26,26,.08);
    --shadow-card-hover: 7px 7px 0px rgba(26,26,26,.26), 0 16px 40px rgba(26,26,26,.16);
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background: radial-gradient(900px 520px at 15% 0%, rgba(196,69,54,.10), transparent 55%),
                radial-gradient(820px 500px at 85% 15%, rgba(107,112,92,.12), transparent 50%),
                linear-gradient(#f5f1e8, #f5f1e8);
}
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: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background-color var(--transition);
    border: 3px solid var(--color-border);
    background: linear-gradient(180deg, rgba(245,241,232,.92), rgba(245,241,232,1));
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: background-color var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
    border: 2px solid var(--color-border);
    box-shadow: 4px 4px 0px rgba(26,26,26,.16);
    background: linear-gradient(180deg, rgba(245,241,232,1), rgba(245,241,232,.88));
    color: var(--color-text);
}
a:not([class]) {
    color: var(--color-primary);
    transition: color var(--transition), text-shadow var(--transition), background-color var(--transition), border-color var(--transition);
    text-decoration-color: rgba(196,69,54,.45);
}

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

/* news: grid-3 */
/* 三列等宽网格 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

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

/* hero: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; }

/* 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-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }

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

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

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }

/* 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: 2px 2px 0px rgba(26,26,26,.18);
}
.hero, [class*="hero"], section:first-of-type {
    background:
      linear-gradient(135deg, rgba(196,69,54,.98) 0%, rgba(162,54,44,.94) 35%, rgba(107,112,92,.92) 100%),
      radial-gradient(900px 520px at 20% 10%, rgba(245,241,232,.35), transparent 55%);
}
.card { border-left: 3px solid var(--color-primary); }
header, .header, .navbar {
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-bottom: 2px solid rgba(26,26,26,.16);
}

/* 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; }
}