:root {
    --color-primary: #1f6f5b;
    --color-primary-dark: #124e40;
    --color-accent: #34d399;
    --color-surface: #f0fdfb;
    --color-text: #0f3d34;

    --rgb-primary: 31,111,91;
    --rgb-accent: 52,211,153;

    --radius-sm: 0;
    --radius-md: 2px;
    --radius-lg: 3px;
    --radius-xl: 10px;

    --shadow-sm:
        0 1px 0 rgba(0, 0, 0, 0.10),
        0 6px 18px rgba(16, 185, 129, 0.10);
    --shadow-md:
        0 10px 30px rgba(2, 44, 35, 0.14),
        0 2px 8px rgba(2, 44, 35, 0.10),
        0 1px 0 rgba(255, 255, 255, 0.55) inset;
    --shadow-lg:
        0 20px 60px rgba(2, 44, 35, 0.18),
        0 6px 18px rgba(2, 44, 35, 0.10),
        0 1px 0 rgba(255, 255, 255, 0.65) inset;

    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;

    --transition: 0.55s cubic-bezier(0.22, 0.9, 0.2, 1);
    --heading-weight: 800;
    --body-line-height: 1.65;
}

body { color: var(--color-text); 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:
        0 1px 0 rgba(255, 255, 255, 0.70) inset,
        0 16px 44px rgba(2, 44, 35, 0.18),
        0 4px 14px rgba(2, 44, 35, 0.12);
    padding: var(--space-card);
    transition: var(--transition);
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.35);
}

a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.25);
}

:root {
    caret-color: var(--color-primary);
    accent-color: var(--color-accent);
}

.card { border-left: 3px solid var(--color-primary); }

section:first-of-type,
.hero,
[class*="hero"] { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

.hero, [class*="hero"], section:first-of-type {
    background:
        radial-gradient(900px 380px at 15% 5%, rgba(52, 211, 153, 0.28), rgba(52, 211, 153, 0) 60%),
        radial-gradient(720px 360px at 95% 20%, rgba(34, 197, 94, 0.22), rgba(34, 197, 94, 0) 62%),
        linear-gradient(135deg, #1f6f5b, #124e40);
    box-shadow:
        0 1px 0 rgba(255, 255, 255, 0.55) inset,
        0 26px 90px rgba(2, 44, 35, 0.18);
}

header, .header, .navbar { background: transparent; }

/* ========== 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; }

/* features: centered */
/* 居中大卡片 */
                .feature-list { display: flex; flex-direction: column; align-items: center; gap: calc(var(--space-gap) * 2); max-width: 720px; margin: 0 auto; }

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

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
                .testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }

/* 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; }

/* cta: card-style */
.cta-inner {
    background:
        radial-gradient(520px 220px at 10% 10%, rgba(52, 211, 153, 0.30), rgba(52, 211, 153, 0) 60%),
        radial-gradient(420px 180px at 90% 30%, rgba(16, 185, 129, 0.22), rgba(16, 185, 129, 0) 62%),
        linear-gradient(180deg, rgba(240, 253, 251, 0.92), rgba(240, 253, 251, 0.70));
    border-radius: var(--radius-xl);
    padding: 3rem;
    text-align: center;
    box-shadow:
        0 1px 0 rgba(255, 255, 255, 0.75) inset,
        0 26px 80px rgba(2, 44, 35, 0.16),
        0 6px 20px rgba(2, 44, 35, 0.10);
    border: 1px solid rgba(18, 78, 64, 0.10);
}

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
            .page-main { max-width: 1200px; margin: 0 auto; }

/* 条件性装饰 */
.card { border-left: 3px solid var(--color-primary); }
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: 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; }
}