:root {
    --color-primary: #87a878;
    --color-primary-dark: #6b8a5e;
    --color-accent: #c47b5a;
    --color-surface: #faf8f3;
    --color-text: #2d2d2d;
    --rgb-primary: 135,168,120;
    --rgb-accent: 196,123,90;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 1px 3px rgba(100,80,60,0.08), 0 1px 2px rgba(100,80,60,0.06);
    --shadow-md: 0 4px 6px -1px rgba(100,80,60,0.1), 0 2px 4px -2px rgba(100,80,60,0.05);
    --shadow-lg: 0 10px 15px -3px rgba(100,80,60,0.12), 0 4px 6px -4px rgba(100,80,60,0.08);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
    --heading-weight: 600;
    --body-line-height: 1.75;
}

body { 
    color: var(--color-text); 
    line-height: var(--body-line-height); 
    background: radial-gradient(ellipse at 20% 50%, #faf8f3 0%, #f0ebe0 100%);
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section { 
    padding-top: var(--space-section); 
    padding-bottom: var(--space-section); 
    background: linear-gradient(180deg, transparent 0%, rgba(135,168,120,0.04) 100%);
}
.card, [class*="card"] { 
    border-radius: var(--radius-lg); 
    box-shadow: var(--shadow-md); 
    padding: var(--space-card); 
    transition: var(--transition); 
    background: linear-gradient(145deg, #faf8f3, #f5f0e8);
    border: 1px solid transparent;
    border-image: linear-gradient(135deg, var(--color-primary), var(--color-accent)) 1;
}
.btn, button[class*="btn"], a[class*="btn"] { 
    border-radius: var(--radius-md); 
    transition: var(--transition); 
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
    border: none;
}
a:not([class]) { 
    color: var(--color-primary); 
    transition: var(--transition); 
    text-shadow: 0 1px 2px rgba(135,168,120,0.15);
}

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

/* news: featured-left */
/* 左大右小 (1大+2小) */
.news-grid { display: grid; grid-template-columns: 2fr 1fr; grid-template-rows: auto auto; gap: var(--space-gap); }
.news-grid > *:first-child { grid-row: span 2; }

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

/* cta: card-style */
.cta-inner { 
    background: linear-gradient(135deg, #faf8f3, #e8e0d5); 
    border-radius: var(--radius-xl); 
    padding: 3rem; 
    text-align: center; 
    box-shadow: 0 8px 20px -6px rgba(100,80,60,0.15);
}

/* Page Layout: narrow-centered */
.page-main { max-width: 800px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { 
    transform: translateY(-4px); 
    box-shadow: var(--shadow-lg); 
    border-image: linear-gradient(135deg, var(--color-accent), var(--color-primary)) 1;
}
.card { 
    border: 1px solid; 
}
header, .header, .navbar { 
    box-shadow: 0 2px 8px rgba(100,80,60,0.06); 
    background: linear-gradient(180deg, #faf8f3, #f5f0e8);
}

/* 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; }
}