:root {
    --color-primary: #7c2d12;
    --color-primary-dark: #4b1d14;
    --color-accent: #f59e0b;
    --color-surface: #f8fafc;
    --color-text: #111827;
    --rgb-primary: 124,45,18;
    --rgb-accent: 245,158,11;
    --radius-sm: 3px;
    --radius-md: 6px;
    --radius-lg: 12px;
    --radius-xl: 18px;
    --shadow-sm:
        0 1px 0 rgba(0,0,0,.06),
        0 0 0 1px rgba(15,23,42,.05);
    --shadow-md:
        0 10px 24px rgba(2,6,23,.10),
        0 3px 10px rgba(2,6,23,.06),
        0 1px 0 rgba(255,255,255,.55) inset;
    --shadow-lg:
        0 24px 60px rgba(2,6,23,.16),
        0 10px 28px rgba(2,6,23,.10),
        0 2px 0 rgba(255,255,255,.40) inset;
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.55s cubic-bezier(0.2, 0.9, 0.2, 1);
    --heading-weight: 650;
    --body-line-height: 1.65;
}

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-lg);
    box-shadow:
        0 18px 45px rgba(2,6,23,.14),
        0 6px 18px rgba(2,6,23,.08),
        0 0 0 1px rgba(124,45,18,.10) inset;
    padding: var(--space-card);
    transition: filter var(--transition), transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
}
a:not([class]) {
    color: var(--color-primary);
    transition: color var(--transition), text-shadow var(--transition), filter var(--transition);
    text-shadow: 0 1px 0 rgba(255,255,255,.45);
}

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

/* hero: overlay */
/* 全屏背景+文字覆盖 */
                .hero { position: relative; min-height: 70vh; display: flex; align-items: center; }
                .hero-content { position: relative; z-index: 1; }

/* 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: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }

/* 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, rgba(245,158,11,.95), rgba(124,45,18,.98) 55%, rgba(17,24,39,.92));
    color: #fefce8;
    padding: 4rem 2rem;
    box-shadow:
        0 30px 90px rgba(2,6,23,.18),
        0 10px 30px rgba(2,6,23,.10),
        0 0 0 1px rgba(245,158,11,.18) inset;
}

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
            .page-main { max-width: 1200px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-6px);
    box-shadow:
        0 34px 90px rgba(2,6,23,.22),
        0 12px 36px rgba(2,6,23,.12),
        0 0 0 1px rgba(245,158,11,.20) inset;
    filter: saturate(1.08) contrast(1.02);
}
a:not([class]):hover {
    color: #d97706;
    text-shadow:
        0 0 22px rgba(245,158,11,.35),
        0 1px 0 rgba(255,255,255,.55);
    filter: brightness(1.02);
}
.hero, [class*="hero"], section:first-of-type {
    background:
        radial-gradient(1200px 500px at 20% 10%, rgba(245,158,11,.55), rgba(245,158,11,0) 55%),
        radial-gradient(900px 420px at 85% 20%, rgba(124,45,18,.55), rgba(124,45,18,0) 52%),
        linear-gradient(135deg, #1f2937 0%, #3b1a14 42%, #7c2d12 78%, #f59e0b 120%);
    box-shadow:
        0 30px 110px rgba(2,6,23,.18),
        0 10px 35px rgba(2,6,23,.10),
        0 0 0 1px rgba(245,158,11,.12) inset;
}
.card { border-left: 4px solid rgba(245,158,11,.85); border-radius: var(--radius-lg); }

/* 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; }
}