:root {
    --color-primary: #FF4D2E;
    --color-primary-dark: #B32205;
    --color-accent: #2E86FF;
    --color-surface: #FFF8E7;
    --color-text: #141414;
    --color-bg: #F4F1EA;
    --color-border: #141414;
    --rgb-primary: 255,77,46;
    --rgb-accent: 46,134,255;
    --radius-sm: 0px;
    --radius-md: 3px;
    --radius-lg: 4px;
    --radius-xl: 4px;
    --shadow-sm: 3px 3px 0 0 var(--color-border);
    --shadow-md: 4px 4px 0 0 var(--color-border);
    --shadow-lg: 7px 7px 0 0 var(--color-border);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 600;
    --body-line-height: 1.75;
    accent-color: var(--color-primary);
    caret-color: var(--color-primary);
}

/* 基础覆盖 */
body { color: var(--color-text); background-color: var(--color-bg); 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); background-color: var(--color-surface); }
.card, [class*="card"] { border-radius: var(--radius-sm); box-shadow: var(--shadow-sm), inset 0 0 0 2px var(--color-border); padding: var(--space-card); background-color: #FFFFFF; transition: var(--transition); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-sm); border-color: var(--color-border); border-style: solid; background-color: var(--color-primary); color: #FFFFFF; box-shadow: 3px 3px 0 0 var(--color-border), inset 0 0 0 2px var(--color-border); transition: var(--transition); }
a:not([class]) { color: var(--color-primary); text-decoration-thickness: 2px; text-underline-offset: 2px; transition: var(--transition); }

/* ========== 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: grid-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }

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

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

/* 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(-4px); box-shadow: var(--shadow-lg), inset 0 0 0 2px var(--color-border); }
a:not([class]):hover { color: var(--color-accent); }
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(135deg, #FF4D2E 0%, #FF4D2E 40%, #141414 40%, #141414 42%, #2E86FF 42%, #2E86FF 100%); color: #FFFFFF; }
header, .header, .navbar { background: #141414; color: #FFFFFF; }

/* 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; }
}