:root {
    --color-primary: #0f766e;
    --color-primary-dark: #115e59;
    --color-accent: #fbbf24;
    --color-surface: #f0fdf4;
    --color-text: #083344;

    --rgb-primary: 15,118,110;
    --rgb-accent: 251,191,36;

    --radius-sm: 0px;
    --radius-md: 3px;
    --radius-lg: 4px;
    --radius-xl: 6px;

    --shadow-sm: none;
    --shadow-md: none;
    --shadow-lg: none;

    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;

    --transition: 420ms cubic-bezier(0.2, 0.9, 0.15, 1);
    --heading-weight: 600;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: #f8fafc; }
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: none;
    padding: var(--space-card);
    transition: background-color var(--transition), border-color var(--transition), transform var(--transition), color var(--transition);
    border: 1px solid rgba(var(--rgb-primary), .28);
    background: #ffffff;
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: background-color var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
    border: 1px solid rgba(var(--rgb-primary), .35);
    background: #ffffff;
    color: var(--color-primary-dark);
}

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

:focus { outline: 2px solid rgba(var(--rgb-accent), .7); outline-offset: 2px; }
::selection { background: rgba(var(--rgb-accent), .35); color: var(--color-text); caret-color: var(--color-primary); }
html { accent-color: var(--color-primary); }

/* ========== 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: left-aligned */
.hero-content { text-align: left; max-width: 600px; }

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

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

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: card-style */
.cta-inner {
    background: #111827;
    border-radius: var(--radius-xl);
    padding: 3rem;
    text-align: center;
    border: 1px solid rgba(251,191,36,.55);
    color: #f9fafb;
}

/* Page Layout: narrow-centered */
/* 窄版居中 */
            .page-main { max-width: 860px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-2px);
    box-shadow: none;
    border-color: rgba(var(--rgb-accent), .75);
    background: #ffffff;
}

a:not([class]):hover { color: var(--color-accent); }

.card { border: 1px solid rgba(var(--rgb-primary), .28); }

/* Section asymmetry (visual only; layout unchanged) */
.news-grid > *:first-child {
    background: #fffbeb;
    border-color: rgba(234,88,12,.55);
    border-radius: var(--radius-xl);
}

.feature-list > * {
    border-radius: var(--radius-lg);
    border: 1px solid rgba(15,118,110,.35);
    background: #ecfeff;
}

.testimonial-list > * {
    border-radius: var(--radius-lg);
    border: 1px solid rgba(59,130,246,.35);
    background: #eff6ff;
}

.partner-grid > * {
    border-radius: var(--radius-md);
    border: 1px solid rgba(16,185,129,.32);
    background: #f0fdf4;
}

.faq-wrapper > :first-child {
    border-radius: var(--radius-xl);
    border: 1px solid rgba(244,63,94,.35);
    background: #fff1f2;
}

.faq-wrapper > :last-child {
    border-radius: var(--radius-xl);
    border: 1px solid rgba(251,191,36,.45);
    background: #fffbeb;
}

.stats-grid > * {
    border-radius: var(--radius-lg);
    border: 1px solid rgba(56,189,248,.35);
    background: #ecfeff;
}

header, .header, .navbar { background: transparent; border-color: 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; }
}