:root {
    --color-primary: #006d77;
    --color-primary-dark: #003b38;
    --color-accent: #f77f00;
    --color-surface: #f4f6fb;
    --color-text: #0b1320;
    --rgb-primary: 0,109,119;
    --rgb-accent: 247,127,0;
    --radius-sm: 0px;
    --radius-md: 1px;
    --radius-lg: 2px;
    --radius-xl: 3px;
    --shadow-sm: 4px 4px 0px rgba(0, 109, 119, .18);
    --shadow-md: 4px 4px 0px rgba(0, 0, 0, .14), 9px 10px 18px rgba(0, 109, 119, .10);
    --shadow-lg: 4px 4px 0px rgba(0, 0, 0, .18), 14px 16px 28px rgba(0, 109, 119, .18);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.15s cubic-bezier(.2,.9,.2,1);
    --heading-weight: 700;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
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-xl);
    box-shadow:
        4px 4px 0px rgba(0, 0, 0, .16),
        0px 1px 0px rgba(255,255,255,.85) inset,
        10px 12px 22px rgba(0, 109, 119, .12);
    padding: var(--space-card);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
    background: #ffffff;
    border: 2px solid rgba(0, 0, 0, .06);
}
.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);
    border: 2px solid rgba(0, 0, 0, .10);
}
a:not([class]) { color: var(--color-primary); transition: color var(--transition), text-shadow var(--transition); }
a:not([class]):focus { outline: 2px solid rgba(247,127,0,.55); outline-offset: 3px; border-radius: 2px; }

section, .section, .card, [class*="card"], .btn, button[class*="btn"], a[class*="btn"] { text-shadow: 0 1px 0 rgba(255,255,255,.35); }

/* ========== 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-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }

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

/* partners: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 20s linear infinite; }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 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; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-3px);
    box-shadow:
        4px 4px 0px rgba(0, 0, 0, .20),
        0px 0px 0px 3px rgba(247,127,0,.18),
        0px 1px 0px rgba(255,255,255,.9) inset,
        16px 18px 32px rgba(0, 109, 119, .20);
    border-color: rgba(247,127,0,.35);
}
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 0 rgba(0,0,0,0), 0 1px 0 rgba(255,255,255,.45); }
.hero, [class*="hero"], section:first-of-type {
    background: linear-gradient(135deg, #006d77 0%, #003b38 38%, rgba(247,127,0,.92) 100%);
    border-top: 2px solid rgba(0,0,0,.10);
    border-bottom: 2px solid rgba(0,0,0,.10);
}
.card { border-left: 3px solid rgba(0, 109, 119, .95); }

/* 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; }
}