:root {
    --color-primary: #2d2d2d;
    --color-primary-dark: #121212;
    --color-accent: #87a878;
    --color-surface: #faf8f3;
    --color-text: #2d2d2d;
    --rgb-primary: 45,45,45;
    --rgb-accent: 135,168,120;
    --radius-sm: 2px;
    --radius-md: 3px;
    --radius-lg: 4px;
    --radius-xl: 6px;
    --shadow-sm: 2px 2px 0 rgba(45,45,45,.18);
    --shadow-md: 4px 4px 0 rgba(45,45,45,.22);
    --shadow-lg: 6px 6px 0 rgba(45,45,45,.26);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.15s cubic-bezier(.2,.8,.2,1);
    --heading-weight: 700;
    --body-line-height: 1.7;
    --focus-ring: rgba(135,168,120,.55);
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: var(--color-surface); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); letter-spacing: -0.01em; }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] {
    border-radius: var(--radius-xl);
    box-shadow:
        4px 4px 0 rgba(45,45,45,.22),
        8px 10px 18px rgba(0,0,0,.08);
    padding: var(--space-card);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background-color var(--transition);
    background: #ffffff;
    border: 2px solid rgba(45,45,45,.10);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition), color var(--transition);
}
a:not([class]) {
    color: var(--color-accent);
    transition: color var(--transition), text-shadow var(--transition);
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
    text-shadow: none;
}

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

/* news: masonry-2 */
/* 两列瀑布流 */
                .news-grid { column-count: 2; column-gap: var(--space-gap); }
                .news-grid .card {
                    break-inside: avoid;
                    margin-bottom: var(--space-gap);
                    border-left: 0;
                    box-shadow:
                        4px 4px 0 rgba(45,45,45,.22),
                        10px 14px 26px rgba(0,0,0,.09);
                }

/* features: grid-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }
.feature-list .card {
    border-top: 2px solid rgba(135,168,120,.9);
    border-right: 2px solid rgba(45,45,45,.12);
    border-bottom: 2px solid rgba(45,45,45,.08);
    border-left: 2px solid rgba(45,45,45,.08);
    box-shadow:
        4px 4px 0 rgba(45,45,45,.20),
        0 10px 22px rgba(0,0,0,.07);
}

/* hero: split */
/* 左文右图 */
                .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }
.hero-inner .card {
    border-radius: var(--radius-sm);
    border: 2px solid rgba(45,45,45,.14);
    box-shadow:
        4px 4px 0 rgba(45,45,45,.26),
        0 18px 34px rgba(0,0,0,.10);
}

/* testimonials: carousel */
/* 单条轮播 */
                .testimonial-list { display: flex; overflow: hidden; } 
                .testimonial-list > * { flex: 0 0 100%; }
.testimonial-list .card {
    box-shadow:
        4px 4px 0 rgba(45,45,45,.22),
        0 12px 26px rgba(0,0,0,.08);
    border-color: rgba(45,45,45,.12);
}

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
.partner-grid .card {
    box-shadow:
        4px 4px 0 rgba(45,45,45,.18),
        0 10px 22px rgba(0,0,0,.06);
    border: 2px solid rgba(45,45,45,.10);
    background: linear-gradient(180deg, #ffffff 0%, #fbfaf7 100%);
}

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-list .card {
    box-shadow:
        4px 4px 0 rgba(45,45,45,.24),
        0 12px 24px rgba(0,0,0,.07);
    border-radius: 2px;
    border-style: solid;
}

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }
.stats-grid .card {
    box-shadow:
        4px 4px 0 rgba(45,45,45,.20),
        0 10px 22px rgba(0,0,0,.06);
    border-top: 2px solid rgba(135,168,120,.85);
    border-bottom: 2px solid rgba(45,45,45,.10);
}

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }
.cta-inner .card {
    box-shadow:
        4px 4px 0 rgba(45,45,45,.26),
        0 18px 38px rgba(0,0,0,.10);
    border: 3px solid rgba(45,45,45,.14);
}

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

/* 条件性装饰 */
.hero, [class*="hero"], section:first-of-type {
    background:
        radial-gradient(900px 320px at 12% 0%, rgba(135,168,120,.35) 0%, rgba(135,168,120,0) 55%),
        linear-gradient(135deg, #faf8f3 0%, #f0eee6 28%, #e7e4dc 55%, #faf8f3 100%);
    border-bottom: 3px solid rgba(45,45,45,.14);
}
.card { border-left: 3px solid var(--color-accent); }

/* 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; }
    .hero, [class*="hero"], section:first-of-type { border-bottom-color: rgba(45,45,45,.10); }
}
@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; }
    .card, [class*="card"] {
        border-radius: 4px;
        box-shadow:
            3px 3px 0 rgba(45,45,45,.22),
            0 10px 22px rgba(0,0,0,.07);
    }
}