:root {
    --color-primary: #0f766e;
    --color-primary-dark: #0f172a;
    --color-accent: #ea580c;
    --color-surface: #f5fbff;
    --color-text: #1e293b;
    --rgb-primary: 15,118,110;
    --rgb-accent: 234,88,12;
    --radius-sm: 3px;
    --radius-md: 5px;
    --radius-lg: 7px;
    --radius-xl: 10px;
    --shadow-sm: 0 1px 0 rgba(255,255,255,.55), 0 3px 10px rgba(15,118,110,.14), 0 0 0 1px rgba(15,118,110,.06);
    --shadow-md: 0 2px 0 rgba(255,255,255,.42), 0 10px 22px rgba(15,23,42,.12), 0 0 0 1px rgba(234,88,12,.08);
    --shadow-lg: 0 4px 0 rgba(255,255,255,.30), 0 18px 42px rgba(15,118,110,.16), 0 14px 60px rgba(234,88,12,.10);
    --space-section: 4.4rem;
    --space-card: 1.7rem;
    --space-gap: 1.2rem;
    --transition: 0.28s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.65;
}

body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(180deg, #f7fbff 0%, #eefcf8 100%); accent-color: var(--color-accent); caret-color: var(--color-accent); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: var(--color-primary-dark); text-shadow: 0 1px 0 rgba(255,255,255,.7), 0 8px 18px rgba(15,23,42,.06); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); background: linear-gradient(180deg, rgba(255,255,255,.88), rgba(245,251,255,.82)); }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition), color var(--transition), filter var(--transition); background: linear-gradient(160deg, rgba(255,255,255,.94), rgba(236,251,255,.82)); border-left: 3px dashed var(--color-accent); filter: saturate(1.04) contrast(1.02); backdrop-filter: blur(10px) saturate(1.08); outline: 1px solid rgba(15,118,110,.12); outline-color: rgba(15,118,110,.12); outline-style: solid; }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), color var(--transition), border-color var(--transition); }
a:not([class]) { color: var(--color-primary); transition: color var(--transition), text-shadow var(--transition), opacity var(--transition); text-shadow: 0 1px 0 rgba(255,255,255,.55); }

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

/* news: featured-left */
/* 左大右小 (1大+2小) */
                .news-grid { display: grid; grid-template-columns: 2fr 1fr; grid-template-rows: auto auto; gap: var(--space-gap); }
                .news-grid > *:first-child { grid-row: span 2; }

/* features: grid-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }

/* hero: minimal */
.hero { padding: 1.8rem 0; background: linear-gradient(135deg, rgba(15,118,110,.08), rgba(234,88,12,.05)); border-radius: var(--radius-xl); } .hero-content { max-width: 560px; }

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

/* stats: big-number */
/* 大数字居中 */
                .stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 1.6rem; }
                .stats-grid .stat-value { font-size: 3rem; color: var(--color-primary-dark); text-shadow: 0 1px 0 rgba(255,255,255,.65), 0 10px 20px rgba(15,118,110,.08); }

/* cta: full-bg */
.cta-section { background: linear-gradient(135deg, #0f172a 0%, #0f766e 48%, #ea580c 100%); color: #f8fafc; padding: 4rem 2rem; box-shadow: var(--shadow-lg); filter: saturate(1.06); }

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
            .page-main { max-width: 1200px; margin: 0 auto; }

/* 条件性装饰 */
a:not([class]):hover { color: var(--color-accent); opacity: .92; }
.card { border-left: 3px dashed var(--color-primary); }
header, .header, .navbar { background: rgba(15, 23, 42, 0.03); backdrop-filter: blur(12px) saturate(1.05); }

/* 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: 1.7rem; --space-card: 0.95rem; --space-gap: 0.7rem; }
    .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; }
}