:root {
    --color-primary: #0f766e;
    --color-primary-dark: #134e4a;
    --color-accent: #f59e0b;
    --color-surface: #ecfdf5;
    --color-text: #111827;
    --rgb-primary: 15,118,110;
    --rgb-accent: 245,158,11;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 2px 4px rgba(15,118,110,.06), 0 1px 2px rgba(15,118,110,.04);
    --shadow-md: 0 8px 16px -4px rgba(15,118,110,.14), 0 4px 8px -4px rgba(15,118,110,.08);
    --shadow-lg: 0 20px 30px -8px rgba(15,118,110,.22), 0 10px 20px -6px rgba(245,158,11,.16);
    --space-section: 4.5rem;
    --space-card: 1.25rem;
    --space-gap: 1.5rem;
    --transition: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.6;
}

body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(180deg, #f8fafc 0%, #ecfdf5 100%); caret-color: var(--color-primary); accent-color: var(--color-primary); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 2px 8px rgba(15,118,110,.08); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); background: linear-gradient(180deg, #ffffff 0%, #ecfdf5 100%); }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255,255,255,.7); padding: var(--space-card); transition: var(--transition); background: linear-gradient(145deg, #ffffff 0%, #f0fdfa 100%); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(135deg, #0f766e 0%, #134e4a 100%); color: #ffffff; box-shadow: 0 8px 16px -6px rgba(15,118,110,.5), inset 0 1px 0 rgba(255,255,255,.25); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-shadow: 0 1px 0 rgba(255,255,255,.4); }

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

.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

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

.hero { position: relative; min-height: 70vh; display: flex; align-items: center; }
.hero-content { position: relative; z-index: 1; text-shadow: 0 2px 12px rgba(15,23,42,.35); }

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

.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }

.faq-list { max-width: 800px; margin: 0 auto; }

.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }

.cta-inner { background: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%); border-radius: var(--radius-xl); padding: 3.5rem; text-align: center; box-shadow: 0 20px 30px -8px rgba(245,158,11,.45), inset 0 1px 0 rgba(255,255,255,.4); color: #451a03; }

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

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg), 0 0 0 1px rgba(245,158,11,.15), inset 0 1px 0 rgba(255,255,255,.8); }
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(135deg, #0f172a 0%, #134e4a 50%, #0f766e 100%); color: #f8fafc; text-shadow: 0 2px 10px rgba(0,0,0,.3); }
header, .header, .navbar { background: linear-gradient(180deg, rgba(15,23,42,.25), rgba(15,23,42,.05)); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }

/* 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: 1.75rem; --space-card: 0.875rem; --space-gap: 0.625rem; }
    .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; }
}