:root {
    --color-primary: #b42318;
    --color-primary-dark: #7f1d1d;
    --color-accent: #0ea5a4;
    --color-surface: #fff4d6;
    --color-text: #1f1720;
    --rgb-primary: 180,35,24;
    --rgb-accent: 14,165,164;
    --radius-sm: 2px;
    --radius-md: 3px;
    --radius-lg: 4px;
    --radius-xl: 4px;
    --shadow-sm: 2px 2px 0px #1f1720, 0 0 0 1px rgba(31,23,32,0.12);
    --shadow-md: 4px 4px 0px #0f766e, 0 0 0 2px rgba(31,23,32,0.18);
    --shadow-lg: 6px 6px 0px #7f1d1d, 0 0 0 3px rgba(31,23,32,0.22);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 0.15s cubic-bezier(0.2, 0.8, 0.2, 1);
    --heading-weight: 800;
    --body-line-height: 1.7;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(180deg, #fff8e7 0%, #ffe4b8 100%); caret-color: var(--color-primary); accent-color: var(--color-accent); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: #7f1d1d; text-shadow: 1px 1px 0 rgba(255,244,214,0.9); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); background: linear-gradient(135deg, rgba(255,244,214,0.82) 0%, rgba(255,230,180,0.92) 100%); }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); background: linear-gradient(135deg, #fffdf6 0%, #ffeec2 100%); border-color: #1f1720; border-style: solid; color: #1f1720; filter: saturate(1.02) contrast(1.03); opacity: 0.98; }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(135deg, #b42318 0%, #7f1d1d 100%); color: #fff7ed; border-color: #1f1720; border-style: solid; box-shadow: 4px 4px 0px #1f1720, 0 0 0 2px rgba(255,247,237,0.14) inset; text-shadow: 1px 1px 0 rgba(31,23,32,0.35); outline-color: #0ea5a4; outline-style: solid; }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-color: #0ea5a4; text-shadow: 0.5px 0.5px 0 rgba(255,244,214,0.8); }

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

/* news: masonry-2 */
/* 两列瀑布流 */
                .news-grid { column-count: 2; column-gap: var(--space-gap); background: linear-gradient(90deg, rgba(14,165,164,0.08) 0%, rgba(180,35,24,0.08) 100%); }
                .news-grid .card { break-inside: avoid; margin-bottom: var(--space-gap); background: linear-gradient(145deg, #fdf7e3 0%, #ffd7a8 100%); box-shadow: 4px 4px 0px #b42318, 0 0 0 2px #1f1720; }

/* features: grid-3 */
.feature-list { display: grid; grid-template-columns: repeat( 3, 1fr); gap: var(--space-gap); background: linear-gradient(135deg, rgba(180,35,24,0.06) 0%, rgba(14,165,164,0.06) 100%); }

/* hero: minimal */
.hero { padding: 2rem 0; background: linear-gradient(135deg, #7f1d1d 0%, #b42318 52%, #0ea5a4 100%); } .hero-content { max-width: 560px; color: #fff7ed; text-shadow: 2px 2px 0 rgba(31,23,32,0.25); }

/* testimonials: stacked */
/* 垂直堆叠 */
                .testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; background: linear-gradient(180deg, rgba(255,239,196,0.7) 0%, rgba(255,214,168,0.7) 100%); }

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; background: linear-gradient(135deg, rgba(14,165,164,0.1) 0%, rgba(255,244,214,0.9) 100%); }

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; background: linear-gradient(180deg, rgba(255,244,214,0.85) 0%, rgba(255,228,184,0.95) 100%); }

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; background: linear-gradient(135deg, rgba(180,35,24,0.08) 0%, rgba(255,244,214,0.95) 55%, rgba(14,165,164,0.08) 100%); }

/* cta: split */
.cta-inner { display: grid ; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; background: linear-gradient(135deg, #0f766e 0%, #0ea5a4 100%); color: #fef7ed; box-shadow: 6px 6px 0px #1f1720, 0 0 0 3px #fff4d6 inset; border-radius: 4px; }

/* Page Layout: narrow-centered */
/* 窄版居中 */
            .page-main { max-width: 860px; margin: 0 auto; background: linear-gradient(180deg, rgba(255,253,246,0.78) 0%, rgba(255,244,214,0.88) 100%); backdrop-filter: blur(4px) saturate(1.05); }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); filter: saturate(1.1) contrast(1.05); opacity: 1; }
.card { border-left: 3px solid var(--color-primary); border-top: 2px solid #1f1720; border-right: 2px dashed #0ea5a4; border-bottom: 2px solid #1f1720; }
header, .header, .navbar { background: linear-gradient(180deg, rgba(255,248,231,0.72) 0%, rgba(255,228,184,0.62) 100%); backdrop-filter: blur(6px) saturate(1.08); box-shadow: 0 3px 0 #1f1720; border-color: #b42318; border-style: solid; }

/* 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; }
}