:root {
    --color-primary: #5b8c6b;
    --color-primary-dark: #3f6a4d;
    --color-accent: #c47b5a;
    --color-surface: #faf8f3;
    --color-text: #2d2d2d;

    --rgb-primary: 91,140,107;
    --rgb-accent: 196,123,90;

    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 28px;
    --radius-xl: 40px;

    --shadow-sm:
        0 1px 0 rgba(45,45,45,.06),
        0 8px 20px rgba(45,45,45,.08);
    --shadow-md:
        0 2px 0 rgba(45,45,45,.05),
        0 14px 30px rgba(45,45,45,.10),
        0 1px 0 rgba(255,255,255,.55) inset;
    --shadow-lg:
        0 6px 0 rgba(45,45,45,.04),
        0 24px 60px rgba(45,45,45,.14),
        0 1px 0 rgba(255,255,255,.65) inset;

    --space-section: 2.25rem;
    --space-card: 1.1rem;
    --space-gap: 1.15rem;

    --transition: 0.52s cubic-bezier(0.2, 0.85, 0.2, 1);

    --heading-weight: 650;
    --body-line-height: 1.72;
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background:
        radial-gradient(1200px 800px at 10% -10%, rgba(var(--rgb-primary), .14), transparent 55%),
        radial-gradient(900px 700px at 85% 5%, rgba(var(--rgb-accent), .12), transparent 52%),
        linear-gradient(180deg, rgba(250,248,243,1) 0%, rgba(250,248,243,.96) 100%);
}
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 0 0 1px rgba(45,45,45,.06),
        0 16px 44px rgba(45,45,45,.12),
        0 2px 0 rgba(255,255,255,.7) inset,
        0 -1px 0 rgba(0,0,0,.02) inset;
    padding: var(--space-card);
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        border-color var(--transition),
        background var(--transition),
        filter var(--transition);
    background:
        linear-gradient(180deg, rgba(250,248,243,.92) 0%, rgba(255,255,255,.72) 100%);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        background var(--transition),
        border-color var(--transition),
        color var(--transition),
        filter var(--transition);
    text-shadow: 0 1px 0 rgba(255,255,255,.55);
}
a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-shadow: 0 1px 0 rgba(255,255,255,.45);
    text-decoration-thickness: .08em;
}
a:not([class]):hover {
    color: var(--color-primary-dark);
    text-shadow: 0 6px 18px rgba(var(--rgb-primary), .22);
}

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

/* news: grid-3 */
/* 三列等宽网格 */
                .news-grid {
                    display: grid;
                    grid-template-columns: repeat(3, 1fr);
                    gap: var(--space-gap);
                }

/* 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: stacked */
/* 垂直堆叠 */
                .testimonial-list {
                    display: flex;
                    flex-direction: column;
                    gap: var(--space-gap);
                    max-width: 720px;
                    margin: 0 auto;
                }

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }

/* stats: grid-4 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-gap);
    text-align: center;
}

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }

/* 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 0 0 1px rgba(45,45,45,.08),
        0 26px 78px rgba(45,45,45,.16),
        0 2px 0 rgba(255,255,255,.72) inset,
        0 -1px 0 rgba(0,0,0,.03) inset;
    filter: saturate(1.03);
}
.card {
    border-style: solid;
    border-width: 0;
    border-color: rgba(var(--rgb-primary), .18);
    background:
        linear-gradient(180deg, rgba(250,248,243,.94) 0%, rgba(255,255,255,.78) 100%),
        radial-gradient(600px 260px at 20% 0%, rgba(var(--rgb-primary), .16), transparent 60%),
        radial-gradient(480px 240px at 90% 10%, rgba(var(--rgb-accent), .14), transparent 55%);
    box-shadow:
        0 0 0 1px rgba(45,45,45,.06),
        0 14px 36px rgba(45,45,45,.11),
        0 1px 0 rgba(255,255,255,.72) inset;
}

/* 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: 2.05rem; --space-card: 1rem; --space-gap: 0.95rem; }
    .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; }
}