:root {
    --color-primary: #0f766e;
    --color-primary-dark: #115e59;
    --color-accent: #f97316;
    --color-surface: #f7f4e9;
    --color-text: #0b1220;
    --rgb-primary: 15,118,110;
    --rgb-accent: 249,115,22;
    --radius-sm: 2px;
    --radius-md: 3px;
    --radius-lg: 4px;
    --radius-xl: 6px;
    --shadow-sm: none;
    --shadow-md: none;
    --shadow-lg: none;
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 160ms linear;
    --heading-weight: 700;
    --body-line-height: 1.75;
}

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: 0px;
    box-shadow: none;
    padding: var(--space-card);
    transition: var(--transition);
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: 3px;
    transition: var(--transition);
}

a:not([class]) { color: var(--color-primary); transition: var(--transition); }

/* ========== 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: horizontal */
/* 水平滚动 */
                .feature-list { display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; }
                .feature-list > * { flex: 0 0 300px; scroll-snap-align: start; }

/* hero: minimal */
.hero { padding: 2rem 0; } .hero-content { max-width: 560px; }

/* testimonials: grid-3 */
.testimonial-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }

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

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

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }

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

/* 条件性装饰 */
a:not([class]):hover { color: var(--color-accent); }

.card { border: 1px solid rgba(15,118,110,.22); }

header, .header, .navbar {
    box-shadow: none;
    border-bottom: 1px solid rgba(2,6,23,.12);
    background: #ffffff;
}

/* Horizontal-strips visual identity (distinct alternating zones) */
section, .section { background: #ffffff; }
section:nth-of-type(odd), .section:nth-of-type(odd) { background: #ffffff; }
section:nth-of-type(even), .section:nth-of-type(even) { background: #f7f4e9; }
section:nth-of-type(3n), .section:nth-of-type(3n) { background: #0b1220; color: #ffffff; }
section:nth-of-type(4n), .section:nth-of-type(4n) { background: #ffffff; }

.news-grid > * { background: #ffffff; border-radius: 0px; }
.news-grid > *:first-child { background: #ffffff; }

.feature-list { background: transparent; }
.testimonial-list > * { background: #ffffff; border-radius: 0px; }
.partner-grid > * { background: transparent; border-radius: 0px; }
.faq-list > * { background: #ffffff; border-radius: 0px; }
.stats-grid > * { background: transparent; border-radius: 0px; }
.cta-inner > * { 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; --transition: 140ms linear; }
    .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; }
}