:root {
    --color-primary: #7a2e1d;
    --color-primary-dark: #1d0e08;
    --color-accent: #e8906a;
    --color-surface: #f7efe3;
    --color-text: #281710;
    --rgb-primary: 122,46,29;
    --rgb-accent: 232,144,106;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 26px;
    --shadow-sm: 0 2px 4px rgba(122,46,29,.10), 0 1px 2px rgba(232,144,106,.06);
    --shadow-md: 0 18px 32px -14px rgba(122,46,29,.22), 0 6px 12px -8px rgba(122,46,29,.10), inset 0 1px 0 rgba(255,255,255,.35);
    --shadow-lg: 0 32px 64px -24px rgba(122,46,29,.28), 0 14px 28px -14px rgba(122,46,29,.14);
    --space-section: 3.5rem;
    --space-card: 1.25rem;
    --space-gap: 1.125rem;
    --transition: 0.5s cubic-bezier(.22,1,.36,1);
    --heading-weight: 800;
    --body-line-height: 1.75;
}

body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background:
        radial-gradient(circle at 15% 0%, rgba(232,144,106,.16), transparent 32rem),
        radial-gradient(circle at 85% 100%, rgba(122,46,29,.10), transparent 38rem),
        linear-gradient(180deg, #ffffff 0%, #fffdf8 55%, #f6eee1 100%);
}

h1, h2, h3, h4 { font-weight: var(--heading-weight); }

section, .section {
    padding-top: var(--space-section);
    padding-bottom: var(--space-section);
}

section:nth-of-type(4n-3), .section:nth-of-type(4n-3) {
    background: linear-gradient(180deg, #ffffff 0%, #fffdf7 100%);
}

section:nth-of-type(4n-2), .section:nth-of-type(4n-2) {
    background: radial-gradient(circle at 80% 20%, rgba(232,144,106,.18), transparent 30rem), linear-gradient(180deg, #f7efe3 0%, #f0e2cf 100%);
}

section:nth-of-type(4n-1), .section:nth-of-type(4n-1) {
    background: radial-gradient(circle at 20% 80%, rgba(232,144,106,.22), transparent 28rem), linear-gradient(135deg, #1d0e08 0%, #35160e 45%, #5c271a 100%);
    color: #fdf6ed;
}

section:nth-of-type(4n), .section:nth-of-type(4n) {
    background: linear-gradient(90deg, #ffffff 0%, #fdf7ee 50%, #ffffff 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, rgba(255,255,255,.96) 0%, rgba(255,252,245,.92) 50%, rgba(244,233,216,.88) 100%);
    backdrop-filter: blur(6px);
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    background: linear-gradient(135deg, #e8906a 0%, #d97a4e 45%, #7a2e1d 100%);
    color: #fff;
    box-shadow: 0 12px 24px -12px rgba(122,46,29,.45), 0 2px 4px rgba(122,46,29,.1), inset 0 1px 0 rgba(255,255,255,.25);
}

a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
}

section:nth-of-type(4n-1) a:not([class]), .section:nth-of-type(4n-1) a:not([class]) {
    color: var(--color-accent);
}

/* ========== 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: minimal */
.hero { padding: 2rem 0; }
.hero-content { max-width: 560px; }

/* testimonials: carousel */
/* 单条轮播 */
.testimonial-list { display: flex; overflow: hidden; }
.testimonial-list > * { flex: 0 0 100%; }

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2.25rem; }

/* 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: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }

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

/* 条件性装饰 */
a:not([class]):hover {
    color: var(--color-accent);
    text-shadow: 0 2px 12px rgba(232,144,106,.35);
}

.card {
    border-left: 3px solid;
    border-image: linear-gradient(180deg, #e8906a, #7a2e1d) 1;
}

header, .header, .navbar {
    background: linear-gradient(180deg, rgba(255,255,255,.92), rgba(255,255,255,.78));
    backdrop-filter: blur(12px);
    box-shadow: 0 18px 36px -24px rgba(122,46,29,.35), 0 2px 6px rgba(122,46,29,.08), inset 0 -1px 0 rgba(255,255,255,.3);
}

/* 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: 2.25rem; --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; }
}