:root {
    --color-primary: #0f2d1e;
    --color-primary-dark: #07190f;
    --color-accent: #ffd166;
    --color-surface: #fff6e6;
    --color-text: #123021;
    --rgb-primary: 15,45,30;
    --rgb-accent: 255,209,102;
    --radius-sm: 2px;
    --radius-md: 3px;
    --radius-lg: 4px;
    --radius-xl: 0px;
    --shadow-sm: 4px 4px 0px rgba(6, 18, 12, 0.45), 2px 2px 0px rgba(6, 18, 12, 0.22), 0 10px 24px rgba(0,0,0,.08);
    --shadow-md: 4px 4px 0px rgba(6, 18, 12, 0.55), 0 2px 0px rgba(6, 18, 12, 0.18), 0 14px 28px rgba(0,0,0,.10);
    --shadow-lg: 4px 4px 0px rgba(6, 18, 12, 0.65), 0 3px 0px rgba(6, 18, 12, 0.22), 0 18px 40px rgba(0,0,0,.14);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.15s cubic-bezier(0.2, 0.9, 0.2, 1);
    --heading-weight: 700;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(180deg, #ffffff 0%, #fff6e6 45%, #ffffff 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 1px 1px 0 rgba(0,0,0,.05); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); background-image: linear-gradient(90deg, rgba(13, 43, 28, 0.04), rgba(13, 43, 28, 0)); }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: filter var(--transition), box-shadow var(--transition), transform var(--transition), background-color var(--transition); border: 2px solid rgba(7, 25, 15, 0.16); }
.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); border: 2px solid rgba(7, 25, 15, 0.28); }
a:not([class]) { color: var(--color-primary); transition: color var(--transition), text-shadow var(--transition); text-shadow: 1px 1px 0 rgba(0,0,0,.03); }

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

/* news: featured-top */
/* 首篇横跨全宽 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
                .news-grid > *:first-child { grid-column: span 3; }
                .news-grid > * { background: rgba(255,255,255,.65); border: 2px solid rgba(7, 25, 15, 0.10); border-radius: var(--radius-lg); box-shadow: 4px 4px 0 rgba(7, 25, 15, 0.18); }

/* features: grid-3 */
.feature-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
.feature-list > * { background: linear-gradient(180deg, rgba(255,246,230,.9) 0%, rgba(255,255,255,.9) 100%); border: 2px solid rgba(7, 25, 15, 0.12); border-radius: var(--radius-lg); box-shadow: 4px 4px 0 rgba(7, 25, 15, 0.18); }

/* hero: split */
/* 左文右图 */
                .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }
                .hero-inner > * { background: rgba(255,255,255,.72); border: 2px solid rgba(7, 25, 15, 0.12); border-radius: var(--radius-lg); box-shadow: 4px 4px 0 rgba(7, 25, 15, 0.22); }

/* testimonials: stacked */
/* 垂直堆叠 */
                .testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; }
                .testimonial-list > * { border: 2px solid rgba(7, 25, 15, 0.12); border-radius: var(--radius-lg); background: linear-gradient(180deg, rgba(255,255,255,.9) 0%, rgba(255,246,230,.9) 100%); box-shadow: 4px 4px 0 rgba(7, 25, 15, 0.20); }

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }
.partner-grid > * { border: 2px solid rgba(7, 25, 15, 0.10); border-radius: var(--radius-lg); background: rgba(255,255,255,.65); box-shadow: 4px 4px 0 rgba(7, 25, 15, 0.16); }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }
                .faq-wrapper > * { border: 2px solid rgba(7, 25, 15, 0.14); border-radius: var(--radius-lg); background: linear-gradient(180deg, rgba(255,246,230,.92) 0%, rgba(255,255,255,.9) 100%); box-shadow: 4px 4px 0 rgba(7, 25, 15, 0.22); }

/* stats: big-number */
/* 大数字居中 */
                .stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
                .stats-grid .stat-value { font-size: 3rem; text-shadow: 2px 2px 0 rgba(0,0,0,.08); }
                .stats-grid > * { border: 2px solid rgba(7, 25, 15, 0.12); border-radius: var(--radius-lg); background: rgba(255,255,255,.75); box-shadow: 4px 4px 0 rgba(7, 25, 15, 0.18); }

/* cta: full-bg */
.cta-section { background: linear-gradient(90deg, #0f2d1e 0%, #0a2317 55%, #062015 100%); color: #fff; padding: 4rem 2rem; border-top: 3px solid rgba(255, 209, 102, 0.75); border-bottom: 3px solid rgba(255, 209, 102, 0.55); box-shadow: inset 0 0 0 2px rgba(255,255,255,.06), 4px 4px 0 rgba(0,0,0,.22); }
.cta-section a:not([class]) { color: #fff; text-shadow: 1px 1px 0 rgba(0,0,0,.25); }
.cta-section .card, .cta-section [class*="card"] { border-color: rgba(255,255,255,.18); background: rgba(255,255,255,.06); }

/* Page Layout: narrow-centered */
/* 窄版居中 */
            .page-main { max-width: 860px; margin: 0 auto; }
            .page-main { background-image: repeating-linear-gradient(90deg, rgba(7,25,15,.035) 0px, rgba(7,25,15,.035) 1px, rgba(255,255,255,0) 1px, rgba(255,255,255,0) 24px); }

/* 条件性装饰 */
a:not([class]):hover { color: var(--color-accent); text-shadow: 2px 2px 0 rgba(0,0,0,.12), 0 0 0 rgba(0,0,0,0); }
header, .header, .navbar { box-shadow: 4px 4px 0 rgba(7, 25, 15, 0.22), 0 14px 30px rgba(0,0,0,.12); background: rgba(255,255,255,.75); border-bottom: 3px solid rgba(7, 25, 15, 0.18); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }

/* 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; }
    .cta-section { border-top-width: 2px; border-bottom-width: 2px; }
}
@media (max-width: 640px) {
    :root { --space-section: 2rem; --space-card: 1rem; --space-gap: 0.75rem; --radius-lg: 3px; }
    .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; }
    header, .header, .navbar { box-shadow: 3px 3px 0 rgba(7, 25, 15, 0.20), 0 12px 26px rgba(0,0,0,.10); }
}