:root {
    --color-primary: #2dd4bf;
    --color-primary-dark: #0f766e;
    --color-accent: #a78bfa;
    --color-surface: #f1fbff;
    --color-text: #0b1b22;
    --rgb-primary: 45,212,191;
    --rgb-accent: 167,139,250;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 26px;
    --shadow-sm: 0 1px 0 rgba(0,0,0,0.03), 0 6px 14px rgba(2, 132, 199, 0.10);
    --shadow-md: 0 4px 10px rgba(0,0,0,0.06), 0 16px 36px -14px rgba(2, 132, 199, 0.18), 0 1px 0 rgba(255,255,255,0.45) inset;
    --shadow-lg: 0 10px 26px -14px rgba(0,0,0,0.18), 0 28px 64px -28px rgba(0,0,0,0.22), 0 0 0 1px rgba(45,212,191,0.14) inset;
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.45s cubic-bezier(0.2, 0.8, 0.2, 1);
    --heading-weight: 600;
    --body-line-height: 1.7;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: radial-gradient(1200px 600px at 15% -10%, rgba(45,212,191,0.14) 0%, rgba(45,212,191,0.0) 55%), radial-gradient(900px 500px at 90% 0%, rgba(167,139,250,0.12) 0%, rgba(167,139,250,0.0) 55%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 1px 0 rgba(255,255,255,0.35); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: 0 2px 0 rgba(255,255,255,0.55) inset, 0 10px 26px -18px rgba(0,0,0,0.22), 0 24px 60px -34px rgba(2, 132, 199, 0.22); padding: var(--space-card); transition: var(--transition); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); box-shadow: 0 1px 0 rgba(255,255,255,0.55) inset, 0 10px 22px -18px rgba(0,0,0,0.25); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-shadow: 0 1px 0 rgba(255,255,255,0.25); }

/* ========== 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: left-aligned */
.hero-content { text-align: left; max-width: 600px; }

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

/* partners: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 22s linear infinite; }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

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

/* 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; text-shadow: 0 10px 26px rgba(45,212,191,0.14); }

/* cta: card-style */
.cta-inner { background: radial-gradient(900px 240px at 20% 0%, rgba(45,212,191,0.18) 0%, rgba(45,212,191,0) 55%), radial-gradient(700px 240px at 95% 20%, rgba(167,139,250,0.16) 0%, rgba(167,139,250,0) 60%), linear-gradient(180deg, rgba(241,251,255,0.98) 0%, rgba(231,250,255,0.86) 100%); border-radius: var(--radius-xl); padding: 3rem; text-align: center; box-shadow: 0 1px 0 rgba(255,255,255,0.7) inset, 0 18px 48px -30px rgba(0,0,0,0.22), 0 0 0 1px rgba(45,212,191,0.14) inset; }

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

/* 条件性装饰 */
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 8px 22px rgba(167,139,250,0.25); }
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(135deg, #1f2937 0%, #0b3b4a 40%, #0f766e 100%); border-radius: 0; box-shadow: 0 10px 30px rgba(0,0,0,0.10); }
.card { border-left: 3px solid rgba(45,212,191,0.95); box-shadow: 0 2px 0 rgba(255,255,255,0.55) inset, 0 14px 30px -20px rgba(0,0,0,0.2), 0 34px 70px -44px rgba(167,139,250,0.22); }

/* 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; }
}