:root {
    --color-primary: #c44536;
    --color-primary-dark: #9f2f25;
    --color-accent: #6b705c;
    --color-surface: #f5f1e8;
    --color-text: #1a1a1a;

    --rgb-primary: 196,69,54;
    --rgb-accent: 107,112,92;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 18px;

    --shadow-sm: 0 0 0 rgba(0,0,0,0);
    --shadow-md:
        0 10px 28px rgba(10,10,10,.08),
        0 1px 0 rgba(26,26,26,.06);
    --shadow-lg:
        0 18px 44px rgba(10,10,10,.12),
        0 0 26px rgba(var(--rgb-accent), .20),
        0 1px 0 rgba(26,26,26,.08);

    --space-section: 2.2rem;
    --space-card: 1.1rem;
    --space-gap: 1rem;

    --transition: 520ms cubic-bezier(0.16, 1, 0.3, 1);

    --heading-weight: 650;
    --body-line-height: 1.68;
}

body { color: var(--color-text); line-height: var(--body-line-height); background: var(--color-surface); }
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 10px 28px rgba(10,10,10,.08),
        0 0 0 1px rgba(26,26,26,.06),
        0 0 18px rgba(var(--rgb-accent), .10);
    padding: var(--space-card);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
    background: linear-gradient(180deg, rgba(255,255,255,.55), rgba(255,255,255,.28));
}

.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-decoration: none;
}

a:not([class]):focus, a:not([class]):hover {
    color: var(--color-primary-dark);
    text-shadow: 0 0 18px rgba(var(--rgb-primary), .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: centered */
/* 居中大卡片 */
                .feature-list { display: flex; flex-direction: column; align-items: center; gap: calc(var(--space-gap) * 2); max-width: 720px; margin: 0 auto; }

/* hero: split */
/* 左文右图 */
                .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }

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

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }

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

/* 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; }

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }

/* Page Layout: narrow-centered */
/* 窄版居中 */
            .page-main { max-width: 860px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-4px);
    box-shadow:
        0 20px 54px rgba(10,10,10,.15),
        0 0 34px rgba(var(--rgb-accent), .38),
        0 0 0 1px rgba(var(--rgb-accent), .22);
    animation: accentGlowPulse 1.35s cubic-bezier(0.16, 1, 0.3, 1) both;
}

a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 26px rgba(var(--rgb-accent), .35); }

header, .header, .navbar {
    box-shadow:
        0 6px 18px rgba(10,10,10,.08),
        0 0 0 1px rgba(26,26,26,.06);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

@keyframes accentGlowPulse {
    0% {
        box-shadow:
            0 20px 54px rgba(10,10,10,.15),
            0 0 20px rgba(var(--rgb-accent), .22),
            0 0 0 1px rgba(var(--rgb-accent), .18);
    }
    55% {
        box-shadow:
            0 20px 54px rgba(10,10,10,.15),
            0 0 42px rgba(var(--rgb-accent), .52),
            0 0 0 1px rgba(var(--rgb-accent), .26);
    }
    100% {
        box-shadow:
            0 20px 54px rgba(10,10,10,.15),
            0 0 34px rgba(var(--rgb-accent), .38),
            0 0 0 1px rgba(var(--rgb-accent), .22);
    }
}

/* 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: 0.9rem; }
    .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; }
}