:root {
    --color-primary: #c2410c;
    --color-primary-dark: #9a3412;
    --color-accent: #f59e0b;
    --color-surface: #f6f7f9;
    --color-text: #3f3f46;
    --rgb-primary: 194,65,12;
    --rgb-accent: 245,158,11;
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 24px;
    --radius-xl: 28px;
    --shadow-sm: 0 2px 6px rgba(15, 23, 42, .05), 0 10px 20px rgba(15, 23, 42, .04);
    --shadow-md: 0 8px 20px rgba(15, 23, 42, .06), 0 20px 40px rgba(15, 23, 42, .05);
    --shadow-lg: 0 14px 32px rgba(15, 23, 42, .08), 0 28px 56px rgba(15, 23, 42, .09);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 0.34s cubic-bezier(.22,.61,.36,1);
    --heading-weight: 600;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(180deg, #f3f4f6 0%, #eef1f4 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: #27272a; text-shadow: 0 1px 0 rgba(255,255,255,.75); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); background: linear-gradient(180deg, #ffffff 0%, #fcfcfd 100%); backdrop-filter: blur(10px); border-style: solid; border-color: rgba(var(--rgb-primary), .10); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); box-shadow: 0 6px 18px rgba(var(--rgb-primary), .16), inset 0 1px 0 rgba(255,255,255,.55); border-color: rgba(var(--rgb-primary), .18); outline-color: rgba(var(--rgb-primary), .26); caret-color: var(--color-primary); accent-color: var(--color-accent); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-color: rgba(var(--rgb-primary), .38); }

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

/* news: masonry-2 */
/* 两列瀑布流 */
                .news-grid { column-count: 2; column-gap: var(--space-gap); }
                .news-grid .card { break-inside: avoid; margin-bottom: var(--space-gap); box-shadow: 0 10px 24px rgba(17, 24, 39, .06), 0 22px 40px rgba(17, 24, 39, .05); }

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

/* hero: minimal */
.hero { padding: 2rem 0; background: radial-gradient(circle at top left, rgba(var(--rgb-accent), .12) 0%, rgba(255,255,255,0) 42%), linear-gradient(180deg, #f8fafc 0%, #f3f4f6 100%); } .hero-content { max-width: 560px; }

/* 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: 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: full-bg */
.cta-section { background: linear-gradient(135deg, #c2410c 0%, #ea580c 52%, #fb923c 100%); color: #fff; padding: 4rem 2rem; box-shadow: inset 0 1px 0 rgba(255,255,255,.18), 0 18px 44px rgba(154, 52, 18, .28); }

/* 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: 0 16px 30px rgba(17, 24, 39, .08), 0 30px 56px rgba(17, 24, 39, .09); filter: saturate(1.02); }
.card { border: 1px solid rgba(var(--rgb-primary), .08); position: relative; background-image: linear-gradient(180deg, rgba(255,255,255,1) 0%, rgba(252,252,253,1) 100%), linear-gradient(90deg, rgba(var(--rgb-accent), .95) 0%, rgba(var(--rgb-primary), .9) 100%); background-origin: border-box; background-clip: padding-box, border-box; }
header, .header, .navbar { background: linear-gradient(180deg, rgba(255,255,255,.84) 0%, rgba(255,255,255,.6) 100%); backdrop-filter: blur(14px); box-shadow: 0 8px 24px rgba(15, 23, 42, .04); }

/* 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; }
}