:root {
    --color-primary: #0f766e;
    --color-primary-dark: #064e3b;
    --color-accent: #34d399;
    --color-surface: #f6f3e9;
    --color-text: #0b2422;
    --rgb-primary: 15,118,110;
    --rgb-accent: 52,211,153;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 1px 2px rgba(11,36,34,.06), 0 1px 1px rgba(15,118,110,.05);
    --shadow-md: 0 8px 18px -6px rgba(11,36,34,.16), 0 2px 6px -2px rgba(15,118,110,.12);
    --shadow-lg: 0 22px 46px -14px rgba(6,78,59,.26), 0 10px 22px -10px rgba(15,118,110,.20);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --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: #fbfaf5;
    background-image: linear-gradient(180deg, #ffffff 0%, #f6f3e9 42%, #eaf6f2 100%);
    background-attachment: fixed;
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: var(--color-primary-dark); }
section, .section {
    padding-top: var(--space-section);
    padding-bottom: var(--space-section);
    background-image: linear-gradient(115deg, rgba(255,255,255,.96) 0%, rgba(246,243,233,.92) 55%, rgba(234,246,242,.94) 100%);
}
section:nth-of-type(even), .section:nth-of-type(even) {
    background-image: linear-gradient(200deg, #eaf6f2 0%, #ffffff 48%, #f6f3e9 100%);
}
section:nth-of-type(odd), .section:nth-of-type(odd) {
    background-image: linear-gradient(155deg, #ffffff 0%, #f6f3e9 45%, #dff1ec 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(160deg, #ffffff 0%, #f4fbf8 58%, #e6f4f0 100%);
}
.card:hover, [class*="card"]:hover {
    box-shadow: var(--shadow-lg);
    background-image: linear-gradient(160deg, #ffffff 0%, #ecf8f4 50%, #d8efe9 100%);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    background-image: linear-gradient(135deg, #12a396 0%, #0f766e 52%, #064e3b 100%);
    color: #f6fdfb;
    box-shadow: 0 6px 16px -6px rgba(6,78,59,.45), inset 0 1px 0 rgba(255,255,255,.22);
}
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover {
    background-image: linear-gradient(135deg, #34d399 0%, #12a396 50%, #0b5f5f 100%);
    box-shadow: 0 12px 26px -8px rgba(6,78,59,.55), inset 0 1px 0 rgba(255,255,255,.32);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); }
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 1px 6px rgba(52,211,153,.45); }

/* ========== 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: 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-image: linear-gradient(150deg, #04231f 0%, #0b3b36 38%, #0f766e 72%, #12a396 100%);
                    box-shadow: inset 0 0 120px rgba(0,0,0,.45), inset 0 -2px 0 rgba(52,211,153,.35);
                }
                .hero-content { position: relative; z-index: 1; color: #f2fdfa; text-shadow: 0 2px 18px rgba(0,0,0,.45); }

/* testimonials: stacked */
/* 垂直堆叠 */
                .testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; }

/* partners: scroll */
/* 自动滚动 */
                .partner-grid {
                    display: flex;
                    gap: 2rem;
                    overflow: hidden;
                    animation: partnerScroll 20s linear infinite;
                    background-image: linear-gradient(90deg, rgba(234,246,242,0) 0%, rgba(234,246,242,.85) 12%, rgba(234,246,242,.85) 88%, rgba(234,246,242,0) 100%);
                }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

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

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

/* cta: card-style */
.cta-inner {
    background: linear-gradient(135deg, #0b3b36 0%, #0f766e 46%, #12a396 78%, #5eead4 100%);
    border-radius: var(--radius-xl);
    padding: 3rem;
    text-align: center;
    color: #f2fdfa;
    box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255,255,255,.18);
    transition: var(--transition);
}
.cta-inner .btn, .cta-inner button[class*="btn"], .cta-inner a[class*="btn"] {
    background-image: linear-gradient(135deg, #fdf8ec 0%, #f6f3e9 55%, #d9f2ec 100%);
    color: #064e3b;
    box-shadow: 0 10px 24px -10px rgba(0,0,0,.45);
}

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

/* 条件性装饰 */
header, .header, .navbar {
    box-shadow: 0 1px 0 rgba(15,118,110,.10), 0 10px 26px -14px rgba(6,78,59,.30);
    background-image: linear-gradient(100deg, rgba(255,255,255,.98) 0%, rgba(246,243,233,.96) 55%, rgba(234,246,242,.98) 100%);
    backdrop-filter: saturate(140%) blur(6px);
}

/* 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; }
}