:root {
    --color-primary: #0f766e;
    --color-primary-dark: #064e4a;
    --color-accent: #d97706;
    --color-surface: #fdf8ef;
    --color-text: #10312e;
    --rgb-primary: 15,118,110;
    --rgb-accent: 217,119,6;
    --radius-sm: 5px;
    --radius-md: 11px;
    --radius-lg: 19px;
    --radius-xl: 27px;
    --shadow-sm: 0 1px 2px rgba(6,78,74,.10), 0 3px 7px -2px rgba(15,118,110,.14);
    --shadow-md: 0 2px 4px rgba(6,78,74,.07), 0 10px 22px -6px rgba(15,118,110,.18), 0 26px 44px -26px rgba(6,78,74,.22);
    --shadow-lg: 0 4px 8px rgba(6,78,74,.08), 0 24px 48px -12px rgba(15,118,110,.28), 0 50px 78px -42px rgba(6,78,74,.34);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 800;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background-color: #ffffff;
    background-image: linear-gradient(180deg, #ffffff 0%, #fdfaf4 42%, #f2fbf9 78%, #eaf7f4 100%);
    caret-color: var(--color-primary);
    accent-color: var(--color-primary);
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: #0a2724; }
section, .section {
    padding-top: var(--space-section);
    padding-bottom: var(--space-section);
    background-image: linear-gradient(180deg, rgba(255,255,255,0) 0%, rgba(15,118,110,.045) 58%, rgba(217,119,6,.05) 100%);
}
.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--space-card);
    transition: var(--transition);
    background-image: linear-gradient(155deg, #ffffff 0%, #fefaf3 48%, #effaf7 100%);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    background-image: linear-gradient(120deg, #064e4a 0%, #0f766e 45%, #14b8a6 100%);
    box-shadow: 0 1px 0 rgba(255,255,255,.18) inset, 0 8px 20px -10px rgba(15,118,110,.55);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

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

/* news: featured-top */
/* 首篇横跨全宽 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
                .news-grid > *:first-child { grid-column: span 3; }

/* features: horizontal */
/* 水平滚动 */
                .feature-list { display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; }
                .feature-list > * { flex: 0 0 300px; scroll-snap-align: start; }

/* hero: left-aligned */
.hero-content { text-align: left; max-width: 600px; }

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

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: full-bg */
.cta-section {
    background-color: var(--color-primary-dark);
    background-image: linear-gradient(115deg, #042f2c 0%, #0a4a46 32%, #0f766e 66%, #14b8a6 100%);
    color: #f0fdfa;
    padding: 4rem 2rem;
    box-shadow: inset 0 1px 0 rgba(255,255,255,.10), 0 24px 60px -30px rgba(6,78,74,.55);
}

/* 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: var(--shadow-lg); }
a:not([class]):hover { color: var(--color-accent); }
.card { border: 1px solid rgba(var(--rgb-primary), .16); }
header, .header, .navbar {
    background-image: linear-gradient(180deg, rgba(255,255,255,.96) 0%, rgba(253,248,239,.90) 100%);
    box-shadow: 0 1px 2px rgba(6,78,74,.07), 0 10px 26px -14px rgba(15,118,110,.35);
}

/* 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; }
}