:root {
    --color-primary: #334155;
    --color-primary-dark: #0b1220;
    --color-accent: #22c55e;
    --color-surface: #fff7e6;
    --color-text: #0b1220;
    --rgb-primary: 51,65,85;
    --rgb-accent: 34,197,94;
    --rgb-accent2: 59,130,246;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 26px;
    --shadow-sm: 0 1px 0 rgba(15,23,42,.06), 0 10px 22px rgba(15,23,42,.06);
    --shadow-md: 0 8px 20px rgba(15,23,42,.08), 0 2px 6px rgba(15,23,42,.06);
    --shadow-lg: 0 18px 40px rgba(15,23,42,.12), 0 7px 16px rgba(15,23,42,.08), 0 1px 2px rgba(15,23,42,.06);
    --space-section: 3.5rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 520ms cubic-bezier(0.16, 1, 0.3, 1);
    --heading-weight: 700;
    --body-line-height: 1.75;
    --strip-white: #ffffff;
    --strip-cream: #fff3d6;
    --strip-dark: #0b1220;
    --strip-divider: rgba(15,23,42,.08);
}

body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(180deg, rgba(255,247,230,0.7) 0%, rgba(255,247,230,0) 30%), radial-gradient(1200px 600px at 10% 0%, rgba(var(--rgb-accent2),.10) 0%, rgba(var(--rgb-accent2),0) 60%), radial-gradient(900px 500px at 90% 10%, rgba(var(--rgb-accent),.12) 0%, rgba(var(--rgb-accent),0) 55%); }

h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 1px 0 rgba(255,255,255,.55); }

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

.card, [class*="card"] {
    border-radius: var(--radius-xl);
    box-shadow:
        0 1px 0 rgba(15,23,42,.06),
        0 10px 24px rgba(15,23,42,.08),
        0 2px 6px rgba(15,23,42,.06);
    padding: var(--space-card);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background-color var(--transition);
    background:
        radial-gradient(900px 240px at 15% 0%, rgba(var(--rgb-accent), .12) 0%, rgba(var(--rgb-accent), 0) 55%),
        radial-gradient(800px 240px at 85% 0%, rgba(var(--rgb-accent2), .10) 0%, rgba(var(--rgb-accent2), 0) 58%),
        linear-gradient(180deg, rgba(255,255,255,.92) 0%, rgba(255,255,255,.78) 100%);
    border: 1px solid rgba(var(--rgb-primary), .10);
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow: 0 10px 26px rgba(15,23,42,.10), 0 2px 6px rgba(15,23,42,.06);
    border: 1px solid rgba(var(--rgb-primary), .14);
    background: linear-gradient(180deg, rgba(34,197,94,.16) 0%, rgba(34,197,94,.08) 100%);
}

a:not([class]) { color: #0ea5e9; transition: var(--transition); text-decoration-thickness: 1px; text-underline-offset: 3px; }

a:not([class]):hover { color: #0284c7; }

.card:hover, [class*="card"]:hover {
    transform: translateY(-6px);
    box-shadow:
        0 1px 0 rgba(255,255,255,.6),
        0 22px 52px rgba(15,23,42,.14),
        0 10px 22px rgba(15,23,42,.10),
        0 2px 6px rgba(15,23,42,.06);
}

.card { border: 1px solid rgba(var(--rgb-primary), .10); }

header, .header, .navbar {
    box-shadow:
        0 1px 0 rgba(255,255,255,.6),
        0 10px 28px rgba(15,23,42,.10),
        0 2px 8px rgba(15,23,42,.06);
    background: linear-gradient(180deg, rgba(255,255,255,.86) 0%, rgba(255,255,255,.70) 100%);
    border-bottom: 1px solid rgba(var(--rgb-primary), .10);
}

@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: 2.2rem; --space-card: 1.1rem; --space-gap: 0.95rem; --radius-xl: 22px; }
    .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; }
}

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

/* news: masonry-2 */
/* 两列瀑布流 */
                .news-grid { column-count: 2; column-gap: var(--space-gap); }
                .news-grid .card { break-inside: avoid; margin-bottom: var(--space-gap); }

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

/* 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: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 22s linear infinite; }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

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

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }

/* 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; }