:root {
    --color-primary: #2f5b4a;
    --color-primary-dark: #1d3f33;
    --color-accent: #63e6be;
    --color-surface: #f3fff8;
    --color-text: #0e3b2e;
    --rgb-primary: 47,91,74;
    --rgb-accent: 99,230,190;
    --radius-sm: 3px;
    --radius-md: 10px;
    --radius-lg: 22px;
    --radius-xl: 28px;
    --shadow-sm: 0 1px 0 rgba(0,0,0,.02), 0 0 0 1px rgba(15, 70, 52, .04);
    --shadow-md: 0 10px 30px rgba(6, 47, 34, .10), 0 2px 10px rgba(6, 47, 34, .06), 0 0 0 1px rgba(15, 70, 52, .06);
    --shadow-lg: 0 18px 50px rgba(6, 47, 34, .14), 0 6px 22px rgba(6, 47, 34, .10), 0 0 0 1px rgba(15, 70, 52, .08);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.28s cubic-bezier(.2,.9,.2,1);
    --heading-weight: 650;
    --body-line-height: 1.62;
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background: linear-gradient(180deg, rgba(243,255,248,1) 0%, rgba(240,253,244,1) 55%, rgba(255,255,255,1) 100%);
}

h1, h2, h3, h4 {
    font-weight: var(--heading-weight);
    color: var(--color-text);
}

section, .section {
    padding-top: var(--space-section);
    padding-bottom: var(--space-section);
}

.card, [class*="card"] {
    border-radius: var(--radius-xl);
    box-shadow:
        0 1px 0 rgba(255,255,255,.65) inset,
        0 0 0 1px rgba(var(--rgb-primary), .10),
        0 18px 55px rgba(9, 74, 54, .14),
        0 6px 18px rgba(9, 74, 54, .10),
        0 2px 6px rgba(0,0,0,.04);
    padding: var(--space-card);
    transition: var(--transition);
    background:
        radial-gradient(1200px 220px at 20% -10%, rgba(99,230,190,.28) 0%, rgba(99,230,190,0) 55%),
        radial-gradient(900px 220px at 95% 10%, rgba(99,230,190,.18) 0%, rgba(99,230,190,0) 60%),
        linear-gradient(180deg, rgba(255,255,255,.92) 0%, rgba(243,255,248,.92) 100%);
    border: 1px solid rgba(var(--rgb-primary), .10);
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow:
        0 1px 0 rgba(255,255,255,.6) inset,
        0 10px 25px rgba(9, 74, 54, .14);
    border: 1px solid rgba(var(--rgb-primary), .14);
    background-image: linear-gradient(180deg, rgba(99,230,190,.18) 0%, rgba(99,230,190,.06) 60%, rgba(255,255,255,.22) 100%);
}

a:not([class]) {
    color: #1f6b52;
    transition: var(--transition);
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}
a:not([class]):hover {
    color: #145e43;
}

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

/* news: grid-4 */
/* 四列紧凑网格 */
                .news-grid {
                    display: grid;
                    grid-template-columns: repeat(4, 1fr);
                    gap: 24px;
                    align-items: baseline;
                }

/* features: grid-2 */
.feature-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    align-items: baseline;
}

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

/* testimonials: carousel */
/* 单条轮播 */
                .testimonial-list {
                    display: flex;
                    overflow: hidden;
                } 
                .testimonial-list > * {
                    flex: 0 0 100%;
                }

/* partners: scroll */
/* 自动滚动 */
                .partner-grid {
                    display: flex;
                    gap: 24px;
                    overflow: hidden;
                    animation: partnerScroll 20s linear infinite;
                    align-items: center;
                }
                @keyframes partnerScroll {
                    0% { transform: translateX(0); }
                    100% { transform: translateX(-50%); }
                }

/* faq: two-column */
.faq-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    align-items: start;
}

/* stats: inline */
/* 水平排列 */
                .stats-grid {
                    display: flex;
                    justify-content: center;
                    gap: 24px;
                    align-items: baseline;
                }

/* cta: full-bg */
.cta-section {
    background:
        radial-gradient(900px 360px at 15% 20%, rgba(99,230,190,.38) 0%, rgba(99,230,190,0) 60%),
        radial-gradient(700px 300px at 95% 10%, rgba(99,230,190,.22) 0%, rgba(99,230,190,0) 58%),
        linear-gradient(135deg, var(--color-primary) 0%, #2b5a44 40%, var(--color-primary-dark) 100%);
    color: #f2fff8;
    padding: 4rem 2rem;
    box-shadow:
        0 1px 0 rgba(255,255,255,.18) inset,
        0 0 0 1px rgba(255,255,255,.12),
        0 22px 70px rgba(0,0,0,.20);
    border-radius: var(--radius-xl);
}

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

/* 条件性装饰 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-6px);
    box-shadow:
        0 1px 0 rgba(255,255,255,.70) inset,
        0 0 0 1px rgba(var(--rgb-primary), .12),
        0 26px 85px rgba(9, 74, 54, .18),
        0 10px 30px rgba(9, 74, 54, .12),
        0 3px 10px rgba(0,0,0,.05);
}
.card {
    border: 1px solid rgba(var(--rgb-primary), .12);
    outline: 0 solid 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; }
}