:root {
    --color-primary: #0d9488;
    --color-primary-dark: #115e59;
    --color-accent: #ea580c;
    --color-surface: #fff7ed;
    --color-text: #1c1917;
    --color-bg: #f5f0eb;
    --rgb-primary: 13,148,136;
    --rgb-accent: 234,88,12;
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 28px;
    --radius-xl: 36px;
    --shadow-sm: 0 2px 8px rgba(var(--rgb-primary),.10), 0 1px 2px rgba(var(--rgb-primary),.05);
    --shadow-md: 0 8px 28px rgba(var(--rgb-primary),.14), 0 3px 10px rgba(var(--rgb-primary),.08);
    --shadow-lg: 0 20px 50px rgba(var(--rgb-primary),.18), 0 6px 18px rgba(var(--rgb-accent),.10);
    --space-section: 3.5rem;
    --space-card: 1.5rem;
    --space-gap: 1.2rem;
    --transition: 0.55s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.6;
    accent-color: var(--color-primary);
    caret-color: var(--color-accent);
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background:
        radial-gradient(circle at 85% 10%, rgba(var(--rgb-accent), 0.08), transparent 40%),
        radial-gradient(circle at 15% 90%, rgba(var(--rgb-primary), 0.10), transparent 45%),
        var(--color-bg);
}
h1, h2, h3, h4 {
    font-weight: var(--heading-weight);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}
section, .section {
    padding-top: var(--space-section);
    padding-bottom: var(--space-section);
}
.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--space-card);
    transition: var(--transition);
    background:
        radial-gradient(circle at 0% 0%, rgba(var(--rgb-primary), 0.06), transparent 50%),
        linear-gradient(145deg, #ffffff, var(--color-surface) 55%, #ffedd5);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    box-shadow: var(--shadow-sm);
    color: #ffffff;
}
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;
    background:
        radial-gradient(circle at 90% 10%, rgba(var(--rgb-accent), 0.14), transparent 45%),
        linear-gradient(135deg, #ccfbf1, #f0fdf4 50%, #fff7ed);
    box-shadow: var(--shadow-lg);
}

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

/* hero: centered */
.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

/* testimonials: carousel */
/* 单条轮播 */
.testimonial-list {
    display: flex;
    overflow: hidden;
}
.testimonial-list > * {
    flex: 0 0 100%;
}

/* partners: scroll */
/* 自动滚动 */
.partner-grid {
    display: flex;
    gap: 2rem;
    overflow: hidden;
    animation: partnerScroll 26s linear infinite;
}
@keyframes partnerScroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* 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: linear-gradient(135deg, #f97316, #ea580c 40%, #c2410c);
    color: #fff7ed;
    padding: 4rem 2rem;
}

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

/* 条件性装饰 */
a:not([class]):hover {
    color: var(--color-accent);
}
.hero, [class*="hero"], section:first-of-type {
    background: radial-gradient(circle at 20% 15%, #14b8a6 0%, var(--color-primary) 35%, var(--color-primary-dark) 70%, #134e4a 100%);
}
.card {
    border-left: 3px solid var(--color-accent);
    border-image: linear-gradient(to bottom, var(--color-primary), var(--color-accent)) 1;
}

/* 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; }
}