:root {
    --color-primary: #b42318;
    --color-primary-dark: #7f1d1d;
    --color-accent: #f97316;
    --color-surface: #fff7e6;
    --color-text: #2a110c;
    --rgb-primary: 180,35,24;
    --rgb-accent: 249,115,22;
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 26px;
    --radius-xl: 34px;
    --shadow-sm:
        0 1px 0 rgba(0,0,0,.04),
        0 6px 14px rgba(var(--rgb-primary),.14);
    --shadow-md:
        0 1px 0 rgba(0,0,0,.04),
        0 10px 30px rgba(var(--rgb-primary),.14),
        0 2px 0 rgba(255,255,255,.55) inset;
    --shadow-lg:
        0 1px 0 rgba(0,0,0,.04),
        0 20px 60px rgba(var(--rgb-primary),.14),
        0 2px 0 rgba(255,255,255,.60) inset,
        0 -1px 0 rgba(255,255,255,.35) inset;
    --space-section: 2.2rem;
    --space-card: 1.05rem;
    --space-gap: 1rem;
    --transition: 520ms cubic-bezier(.2,.85,.2,1);
    --heading-weight: 650;
    --body-line-height: 1.75;

    --color-cream: #fff6d7;
    --color-white: #ffffff;
    --color-dark: #0f172a;
    --color-mid: rgba(15,23,42,.10);
    --color-border: rgba(180,35,24,.18);
}

body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background:
        radial-gradient(1200px 700px at 18% 8%, rgba(var(--rgb-accent),.12), transparent 55%),
        radial-gradient(900px 600px at 82% 18%, rgba(var(--rgb-primary),.10), transparent 52%),
        linear-gradient(180deg, rgba(255,255,255,.80), rgba(255,247,230,.98));
}

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-xl);
    box-shadow:
        0 1px 0 rgba(0,0,0,.05),
        0 18px 50px rgba(var(--rgb-primary),.14),
        0 10px 24px rgba(15,23,42,.08),
        0 -1px 0 rgba(255,255,255,.55) inset;
    padding: var(--space-card);
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        border-color var(--transition),
        background var(--transition),
        color var(--transition);
    border: 1px solid rgba(var(--rgb-primary),.16);
    background:
        linear-gradient(180deg, rgba(255,255,255,.88), rgba(255,247,230,.92));
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition:
        transform var(--transition),
        background var(--transition),
        color var(--transition),
        box-shadow var(--transition),
        border-color var(--transition);
}

a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

a:not([class]):hover {
    color: var(--color-accent);
    text-shadow: 0 10px 24px rgba(var(--rgb-accent),.18);
}

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

/* news: grid-3 */
/* 三列等宽网格 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

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

/* hero: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; }

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
                .testimonial-list > * {
                    break-inside: avoid;
                    margin-bottom: var(--space-gap);
                }

/* 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);
    box-shadow:
        0 1px 0 rgba(0,0,0,.03),
        0 12px 26px rgba(var(--rgb-primary),.10);
}

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }

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

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

/* 条件性装饰 */
a:not([class]):hover { color: var(--color-accent); }

/* 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: 2.15rem; --space-card: 1.0rem; --space-gap: 0.95rem; }
    .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; }
}