:root {
    --color-primary: #0d9488;
    --color-primary-dark: #134e4a;
    --color-accent: #f97316;
    --color-surface: #fef3c7;
    --color-text: #292524;
    --rgb-primary: 13,148,136;
    --rgb-accent: 249,115,22;
    --radius-sm: 6px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 32px;
    --shadow-sm: 0 2px 4px rgba(13,148,136,0.08), 0 4px 12px rgba(249,115,22,0.06);
    --shadow-md: 0 4px 8px rgba(13,148,136,0.1), 0 12px 24px rgba(13,148,136,0.12), 0 0 0 1px rgba(249,115,22,0.08);
    --shadow-lg: 0 8px 16px rgba(13,148,136,0.14), 0 24px 48px rgba(13,148,136,0.18), 0 2px 8px rgba(249,115,22,0.12);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.75;
    accent-color: var(--color-accent);
}

body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    caret-color: var(--color-accent);
    background: linear-gradient(135deg, #fef9c3 0%, #ffedd5 40%, #ecfdf5 100%);
    background-attachment: fixed;
}

h1, h2, h3, h4 {
    font-weight: var(--heading-weight);
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.65);
}

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: linear-gradient(145deg, rgba(255, 255, 255, 0.94), rgba(236, 253, 245, 0.72));
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
    box-shadow: var(--shadow-sm), inset 0 0 0 1px rgba(255, 255, 255, 0.18);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}

a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-shadow: 0 1px 1px rgba(255, 255, 255, 0.6);
}

/* ========== 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-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }

/* hero: split */
/* 左文右图 */
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
.testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }

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

/* stats: big-number */
/* 大数字居中 */
.stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
.stats-grid .stat-value { font-size: 3rem; color: var(--color-primary-dark); text-shadow: 0 1px 2px rgba(255, 255, 255, 0.7); }

/* cta: card-style */
.cta-inner {
    background: linear-gradient(135deg, #0d9488 0%, #115e59 50%, #134e4a 100%);
    border-radius: var(--radius-xl);
    padding: 3rem;
    text-align: center;
    color: #fff;
    box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255, 255, 255, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

/* 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); }
.card {
    border: 1px solid transparent;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.94), rgba(236, 253, 245, 0.72)) padding-box,
        linear-gradient(135deg, var(--color-primary), var(--color-accent), var(--color-primary-dark)) border-box;
    background-origin: padding-box, border-box;
    background-clip: padding-box, border-box;
}

/* 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; }
}