:root {
    --color-primary: #7c2d12;
    --color-primary-dark: #1a0a05;
    --color-accent: #f59e0b;
    --color-surface: #fff7ed;
    --color-text: #1c0f08;
    --rgb-primary: 124,45,18;
    --rgb-accent: 245,158,11;
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 26px;
    --radius-xl: 34px;
    --shadow-sm: 0 3px 10px -2px rgba(124,45,18,.22), 0 1px 3px rgba(245,158,11,.18);
    --shadow-md: 0 10px 28px -6px rgba(124,45,18,.28), 0 4px 12px -2px rgba(245,158,11,.22);
    --shadow-lg: 0 22px 56px -12px rgba(124,45,18,.32), 0 8px 24px -4px rgba(245,158,11,.26);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.65;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(160deg, #fff7ed 0%, #ffedd5 55%, #fde8c8 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: var(--color-primary-dark); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
section:nth-of-type(odd), .section:nth-of-type(odd) { background: linear-gradient(135deg, rgba(245,158,11,.10) 0%, rgba(124,45,18,.06) 60%, rgba(245,158,11,.04) 100%); }
section:nth-of-type(even), .section:nth-of-type(even) { background: linear-gradient(200deg, rgba(124,45,18,.08) 0%, rgba(245,158,11,.05) 100%); }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); background: linear-gradient(145deg, #ffffff 0%, #fff7ed 50%, #ffedd5 100%); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(120deg, #7c2d12 0%, #b45309 55%, #f59e0b 100%); color: #fff7ed; box-shadow: 0 6px 18px -4px rgba(124,45,18,.45), 0 2px 6px rgba(245,158,11,.35); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-shadow: 0 1px 0 rgba(245,158,11,.18); }

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

/* news: featured-left */
/* 左大右小 (1大+2小) */
                .news-grid { display: grid; grid-template-columns: 2fr 1fr; grid-template-rows: auto auto; gap: var(--space-gap); }
                .news-grid > *:first-child { grid-row: span 2; background: linear-gradient(150deg, #7c2d12 0%, #9a3412 50%, #f59e0b 100%); color: #fff7ed; border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); }

/* features: grid-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }
.feature-list > *:nth-child(odd) { background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.feature-list > *:nth-child(even) { background: linear-gradient(315deg, #fde8c8 0%, #fcd9a8 100%); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); }

/* hero: overlay */
/* 全屏背景+文字覆盖 */
                .hero { position: relative; min-height: 70vh; display: flex; align-items: center; background: linear-gradient(120deg, #1a0a05 0%, #7c2d12 45%, #f59e0b 100%); }
                .hero-content { position: relative; z-index: 1; color: #fff7ed; text-shadow: 0 2px 12px rgba(26,10,5,.55); }

/* testimonials: stacked */
/* 垂直堆叠 */
                .testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; }
                .testimonial-list > * { background: linear-gradient(90deg, rgba(245,158,11,.14) 0%, rgba(124,45,18,.10) 100%); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }
.partner-grid > * { border-radius: var(--radius-md); background: linear-gradient(160deg, #ffffff 0%, #fff7ed 100%); box-shadow: var(--shadow-sm); }

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-list > * { background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); }

/* stats: big-number */
/* 大数字居中 */
                .stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
                .stats-grid .stat-value { font-size: 3rem; background: linear-gradient(120deg, #7c2d12 0%, #f59e0b 100%); -webkit-background-clip: text; background-clip: text; color: transparent; text-shadow: 0 2px 6px rgba(245,158,11,.25); }

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; background: linear-gradient(120deg, #7c2d12 0%, #b45309 50%, #f59e0b 100%); color: #fff7ed; border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); }

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

/* 条件性装饰 */
.card { border: 1px solid rgba(var(--rgb-accent), .35); }
header, .header, .navbar { background: transparent; }

/* 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; }
}