:root {
    --color-primary: #0ea5e9;
    --color-primary-dark: #0369a1;
    --color-accent: #22c55e;
    --color-surface: #f6fffb;
    --color-text: #0b1220;
    --rgb-primary: 14,165,233;
    --rgb-accent: 34,197,94;
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 6px;
    --radius-xl: 6px;
    --shadow-sm: none;
    --shadow-md: none;
    --shadow-lg: none;
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 260ms cubic-bezier(0.2, 0.9, 0.2, 1);
    --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: var(--radius-xl);
    box-shadow: none;
    padding: var(--space-card);
    transition: var(--transition);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

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

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

/* news: list-view */
/* 列表模式 (图左文右) */
                .news-grid { display: flex; flex-direction: column; gap: var(--space-gap); }
                .news-grid .card {
                    display: grid;
                    grid-template-columns: 260px 1fr;
                    border-radius: var(--radius-lg);
                    border: 2px solid rgba(3, 105, 161, 0.35);
                    background: #ffffff;
                }

/* 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; }
                .feature-list .card {
                    border-radius: 0;
                    border: 2px solid rgba(34, 197, 94, 0.45);
                    background: #f0fff4;
                    padding: calc(var(--space-card) * 1.02);
                    color: #052e16;
                }

/* hero: split */
/* 左文右图 */
                .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }
                .hero-inner .card {
                    border-radius: var(--radius-sm);
                    border: 2px solid rgba(14, 165, 233, 0.4);
                    background: #f8fbff;
                }
                .hero-inner .card + .card {
                    border-color: rgba(34, 197, 94, 0.45);
                    background: #ecfdf5;
                }

/* testimonials: grid-3 */
.testimonial-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: left; }
.testimonial-list .card {
    border-radius: 3px;
    border: 2px solid rgba(124, 58, 237, 0.35);
    background: #faf7ff;
}

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }
.partner-grid .card {
    border-radius: 0;
    border: 2px solid rgba(2, 132, 199, 0.35);
    background: #f2fbff;
}

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-list .card {
    border-radius: var(--radius-sm);
    border: 2px solid rgba(17, 24, 39, 0.18);
    background: #ffffff;
}

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }
.stats-grid .card {
    border-radius: var(--radius-sm);
    border: 2px solid rgba(34, 197, 94, 0.35);
    background: #f0fdf4;
}

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }
.cta-inner .card {
    border-radius: 2px;
    border: 2px solid rgba(14, 165, 233, 0.45);
    background: #f7fbff;
}

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

/* 条件性装饰 */
.hero, [class*="hero"], section:first-of-type { background: #0b1220; }
.hero .card, [class*="hero"] .card, section:first-of-type .card {
    border-left: 4px solid #22c55e;
    background: #0f172a;
    color: #e6f7ff;
    border: 2px solid rgba(34, 197, 94, 0.35);
    border-radius: 4px;
}
.hero, [class*="hero"], section:first-of-type { opacity: 0.98; }

/* CTA + links contrast in hero-like regions */
.hero a:not([class]), [class*="hero"] a:not([class]), section:first-of-type a:not([class]) { color: #22c55e; }
.hero h1, .hero h2, .hero h3, .hero h4,
[class*="hero"] h1, [class*="hero"] h2, [class*="hero"] h3, [class*="hero"] h4,
section:first-of-type h1, section:first-of-type h2, section:first-of-type h3, section:first-of-type h4 { color: #e6f7ff; }

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

/* Remove gradients: keep overall visual flat-solid */
.hero, [class*="hero"], section:first-of-type { background-image: none; }

/* 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; }
    .news-grid .card { border-width: 2px; }
}
@media (max-width: 640px) {
    :root { --space-section: 2rem; --space-card: 1rem; --space-gap: 0.75rem; --radius-lg: 4px; }
    .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; }
    .card { border-radius: 4px; }
}