:root {
    --color-primary: #0f766e;
    --color-primary-dark: #0b4f4a;
    --color-accent: #f59e0b;
    --color-surface: #f3fbfa;
    --color-text: #0a2a2a;
    --rgb-primary: 15,118,110;
    --rgb-accent: 245,158,11;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 18px;
    --radius-xl: 26px;
    --shadow-sm: 0 1px 2px rgba(var(--rgb-primary),.16), 0 3px 8px -2px rgba(var(--rgb-primary),.14);
    --shadow-md: 0 2px 5px -1px rgba(var(--rgb-primary),.12), 0 14px 28px -10px rgba(var(--rgb-primary),.24);
    --shadow-lg: 0 10px 22px -8px rgba(var(--rgb-primary),.30), 0 30px 60px -18px rgba(var(--rgb-accent),.35);
    --gradient-panel: linear-gradient(155deg, #ffffff 0%, #eefaf8 50%, #f8fdfc 100%);
    --gradient-brand: linear-gradient(135deg, #0b4f4a 0%, #0f766e 42%, #0e7490 78%, #115e59 100%);
    --gradient-accent: linear-gradient(120deg, #f59e0b 0%, #f97316 52%, #fbbf24 100%);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 0.45s cubic-bezier(0.22, 0.61, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background-color: var(--color-surface);
    background-image:
        radial-gradient(1100px 560px at 10% -12%, rgba(var(--rgb-accent),.12) 0%, rgba(var(--rgb-accent),0) 62%),
        linear-gradient(180deg, #f8fdfc 0%, #e9f7f5 48%, #f3fbfa 100%);
    caret-color: var(--color-primary);
    accent-color: var(--color-primary);
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: var(--color-primary-dark); text-shadow: 0 1px 0 rgba(255,255,255,.9), 0 8px 22px rgba(var(--rgb-primary),.16); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); background-image: linear-gradient(180deg, rgba(var(--rgb-primary),0) 0%, rgba(var(--rgb-primary),.04) 100%); }
.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md), inset 0 0 0 1px rgba(var(--rgb-primary),.12), inset 0 1px 0 rgba(255,255,255,.92);
    padding: var(--space-card);
    transition: var(--transition);
    background-color: #ffffff;
    background-image: var(--gradient-panel);
    border-color: rgba(var(--rgb-primary),.18);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    color: #f0fdfa;
    background-color: var(--color-primary);
    background-image: var(--gradient-brand);
    border-color: rgba(var(--rgb-primary),.45);
    box-shadow: 0 2px 6px -1px rgba(var(--rgb-primary),.40), 0 12px 22px -12px rgba(var(--rgb-primary),.55);
    text-shadow: 0 1px 2px rgba(0,0,0,.22);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-color: rgba(var(--rgb-accent),.65); }

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

/* news: grid-4 */
/* 四列紧凑网格 */
                .news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 0.8); }

/* features: centered */
/* 居中大卡片 */
                .feature-list { display: flex; flex-direction: column; align-items: center; gap: calc(var(--space-gap) * 2); max-width: 720px; margin: 0 auto; }

/* hero: overlay */
/* 全屏背景+文字覆盖 */
                .hero { position: relative; min-height: 70vh; display: flex; align-items: center; background-color: var(--color-primary-dark); background-image:
                    radial-gradient(90% 120% at 88% 6%, rgba(var(--rgb-accent),.38) 0%, rgba(var(--rgb-accent),0) 58%),
                    radial-gradient(120% 140% at 0% 100%, rgba(var(--rgb-primary),.55) 0%, rgba(var(--rgb-primary),0) 62%),
                    linear-gradient(140deg, #0b4f4a 0%, #0f766e 38%, #115e59 66%, #0e7490 100%);
                    box-shadow: inset 0 1px 0 rgba(255,255,255,.14), inset 0 -60px 120px -60px rgba(0,0,0,.45); }
                .hero-content { position: relative; z-index: 1; color: #f0fdfa; text-shadow: 0 2px 12px rgba(0,0,0,.35); }

/* 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: 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: full-bg */
.cta-section {
    background-color: var(--color-primary-dark);
    background-image:
        radial-gradient(120% 150% at 100% 0%, rgba(var(--rgb-accent),.42) 0%, rgba(var(--rgb-accent),0) 56%),
        linear-gradient(120deg, #0b4f4a 0%, #0f766e 38%, #0e7490 70%, #115e59 100%);
    color: #f0fdfa;
    padding: 4rem 2rem;
    box-shadow: inset 0 1px 0 rgba(255,255,255,.16), inset 0 -1px 0 rgba(0,0,0,.20);
    text-shadow: 0 2px 10px rgba(0,0,0,.28);
}

/* Page Layout: wide */
/* 超宽 */
            .page-main { max-width: 1400px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg), inset 0 0 0 1px rgba(var(--rgb-accent),.32), inset 0 1px 0 rgba(255,255,255,.95);
    filter: saturate(1.06);
    border-color: rgba(var(--rgb-accent),.40);
}
a:not([class]):hover { color: var(--color-accent); }

/* 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; }
}