:root {
    --color-primary: #0f766e;
    --color-primary-dark: #134e4a;
    --color-accent: #f59e0b;
    --color-surface: #fffaf0;
    --color-text: #1e293b;
    --rgb-primary: 15, 118, 110;
    --rgb-accent: 245, 158, 11;
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 28px;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.03), 0 4px 14px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 2px 4px rgba(15, 23, 42, 0.04), 0 12px 28px rgba(15, 23, 42, 0.07);
    --shadow-lg: 0 4px 8px rgba(15, 23, 42, 0.04), 0 20px 48px rgba(15, 23, 42, 0.10), 0 2px 4px rgba(15, 23, 42, 0.03);
    --space-section: 3.5rem;
    --space-card: 1.5rem;
    --space-gap: 1.125rem;
    --transition: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --heading-weight: 600;
    --body-line-height: 1.7;
    accent-color: var(--color-accent);
    caret-color: var(--color-primary);
}

body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background-color: #eae6db;
}

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);
}

.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--space-card);
    transition: var(--transition);
    background-color: var(--card-bg, var(--color-surface));
    color: var(--color-text);
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    background-color: var(--color-accent);
    color: #1e293b;
    box-shadow: var(--shadow-sm);
}

a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-decoration-color: rgba(var(--rgb-primary), 0.3);
}

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

/* news: masonry-2 */
.news-grid {
    column-count: 2;
    column-gap: var(--space-gap);
    background-color: #fdf3d1;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    --card-bg: #fef3c7;
}

.news-grid .card {
    break-inside: avoid;
    margin-bottom: var(--space-gap);
}

/* features: grid-3 */
.feature-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-gap);
    background-color: #b5f3e6;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    --card-bg: #ccfbf1;
}

/* hero: minimal */
.hero {
    padding: 2.25rem 0;
    background: linear-gradient(135deg, #0f766e, #134e4a);
    color: #f0fdfa;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    --card-bg: #f0fdfa;
}

.hero-content {
    max-width: 560px;
}

/* testimonials: stacked */
.testimonial-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-gap);
    max-width: 720px;
    margin: 0 auto;
    background-color: #d2dbff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    --card-bg: #e0e7ff;
}

/* partners: grid-4 */
.partner-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: calc(var(--space-gap) * 1.5);
    align-items: center;
    background-color: #ffdebc;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    --card-bg: #ffedd5;
}

/* faq: with-sidebar */
.faq-wrapper {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2.25rem;
    background-color: #c9e9ff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    --card-bg: #e0f2fe;
}

/* stats: grid-3 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-gap);
    text-align: center;
    background-color: #f8d5ea;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    --card-bg: #fce7f3;
}

/* cta: centered */
.cta-inner {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
    background: linear-gradient(135deg, #0f766e, #134e4a);
    color: #f0fdfa;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

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

/* 条件性装饰 */
.card {
    border: 1px solid rgba(var(--rgb-primary), 0.15);
}

/* 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: 2.25rem;
        --space-card: 1.125rem;
        --space-gap: 0.875rem;
    }
    .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; }
}