:root {
    --color-primary: #ff3b5c;
    --color-primary-dark: #b90f2f;
    --color-accent: #00d4ff;
    --color-surface: #0b1020;
    --color-text: #eaf1ff;
    --rgb-primary: 255,59,92;
    --rgb-accent: 0,212,255;

    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 10px;

    --shadow-sm: 0 1px 0 rgba(255, 59, 92, .18);
    --shadow-md: 0 10px 30px rgba(0, 212, 255, .10), 0 2px 10px rgba(255, 59, 92, .08);
    --shadow-lg: 0 18px 55px rgba(0, 212, 255, .16), 0 6px 18px rgba(255, 59, 92, .14);

    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;

    --transition: 140ms cubic-bezier(.2,.75,.15,1);
    --heading-weight: 700;
    --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 10% -10%, rgba(var(--rgb-accent), .22), transparent 55%),
        radial-gradient(900px 520px at 95% 0%, rgba(var(--rgb-primary), .20), transparent 52%),
        linear-gradient(180deg, #060914 0%, #0b1020 55%, #070a14 100%);
    text-rendering: optimizeLegibility;
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section {
    padding-top: var(--space-section);
    padding-bottom: var(--space-section);
}
.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow:
        0 1px 0 rgba(var(--rgb-primary), .18),
        0 0 0 1px rgba(255, 255, 255, .06) inset,
        0 12px 34px rgba(0, 212, 255, .10),
        0 8px 22px rgba(255, 59, 92, .08);
    padding: var(--space-card);
    transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition), color var(--transition);
    background:
        linear-gradient(180deg, rgba(255,255,255,.06) 0%, rgba(255,255,255,.03) 100%),
        radial-gradient(600px 220px at 20% 0%, rgba(0,212,255,.18), transparent 55%),
        radial-gradient(520px 220px at 90% 10%, rgba(255,59,92,.14), transparent 52%);
    border: 1px solid rgba(var(--rgb-primary), .12);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition), color var(--transition);
    box-shadow:
        0 0 0 1px rgba(255,255,255,.10) inset,
        0 10px 24px rgba(0, 212, 255, .10),
        0 6px 18px rgba(255, 59, 92, .08);
}
a:not([class]) {
    color: #ff4d6d;
    transition: color var(--transition), text-shadow var(--transition);
    text-shadow: 0 0 0 rgba(0,0,0,0);
}
a:not([class]):hover {
    color: #00e5ff;
    text-shadow: 0 0 18px rgba(0, 212, 255, .28);
}

/* ========== 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; }

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

/* hero: minimal */
.hero { padding: 2rem 0; }
.hero-content { max-width: 560px; }

/* testimonials: stacked */
/* 垂直堆叠 */
                .testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; }

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

/* 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; }

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }

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

/* 条件性装饰 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-3px);
    box-shadow:
        0 2px 0 rgba(var(--rgb-primary), .22),
        0 0 0 1px rgba(255, 255, 255, .09) inset,
        0 22px 65px rgba(0, 212, 255, .18),
        0 12px 35px rgba(255, 59, 92, .14);
    filter: saturate(1.08);
}
.card { border: 1px solid rgba(var(--rgb-primary), .12); }

/* 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;

        --radius-sm: 3px;
        --radius-md: 5px;
        --radius-lg: 7px;

        --transition: 120ms cubic-bezier(.2,.75,.15,1);
    }
    .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; }
}