:root {
    --color-primary: #0f766e;
    --color-primary-dark: #115e59;
    --color-accent: #60a5fa;
    --color-surface: #f8fafc;
    --color-text: #0f172a;
    --rgb-primary: 15,118,110;
    --rgb-accent: 96,165,250;
    --radius-sm: 5px;
    --radius-md: 10px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --shadow-sm: 0 6px 14px rgba(2, 132, 199, 0.10), 0 2px 6px rgba(15, 118, 110, 0.08);
    --shadow-md: 0 4px 10px rgba(2, 132, 199, 0.10), 0 18px 44px -18px rgba(2, 132, 199, 0.22), 0 20px 40px -10px rgba(15, 118, 110, 0.14);
    --shadow-lg: 0 10px 28px -12px rgba(2, 132, 199, 0.26), 0 24px 60px -24px rgba(2, 132, 199, 0.24), 0 20px 40px -10px rgba(2, 132, 199, 0.16);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.38s cubic-bezier(0.2, 0.8, 0.2, 1);
    --heading-weight: 650;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); }
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 4px 8px rgba(0,0,0,0.05),
        0 20px 40px -10px rgba(0,0,0,0.12),
        0 1px 0 rgba(255,255,255,0.55) inset;
    padding: var(--space-card);
    transition: var(--transition);
}
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

/* ========== 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: overlay */
/* 全屏背景+文字覆盖 */
                .hero { position: relative; min-height: 70vh; display: flex; align-items: center; }
                .hero-content { position: relative; z-index: 1; }

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

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }

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

/* stats: inline */
/* 水平排列 */
                .stats-grid { display: flex; justify-content: center; gap: 3rem; }

/* cta: card-style */
.cta-inner {
    background:
        radial-gradient(1200px 600px at 15% 0%, rgba(96,165,250,0.16) 0%, rgba(96,165,250,0) 55%),
        radial-gradient(900px 520px at 85% 10%, rgba(20,184,166,0.14) 0%, rgba(20,184,166,0) 60%),
        var(--color-surface);
    border-radius: var(--radius-xl);
    padding: 3rem;
    text-align: center;
    box-shadow:
        0 4px 8px rgba(0,0,0,0.05),
        0 22px 55px -25px rgba(15, 118, 110, 0.20),
        0 1px 0 rgba(255,255,255,0.70) inset;
}

/* 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 8px 18px rgba(0,0,0,0.06),
        0 36px 80px -30px rgba(2, 132, 199, 0.20),
        0 24px 60px -28px rgba(15, 118, 110, 0.18),
        0 1px 0 rgba(255,255,255,0.70) inset;
}
a:not([class]):hover { color: var(--color-accent); }
.card { border-left: 3px solid rgba(15, 118, 110, 0.95); }
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; }
}