:root {
    --color-primary: #ff2d55;
    --color-primary-dark: #b4002f;
    --color-accent: #35d0ff;
    --color-surface: #f6fbff;
    --color-text: #0b1220;

    --rgb-primary: 255,45,85;
    --rgb-accent: 53,208,255;

    --radius-sm: 0px;
    --radius-md: 2px;
    --radius-lg: 3px;
    --radius-xl: 4px;

    --shadow-sm:
        0 1px 0 rgba(11,18,32,.18),
        2px 2px 0 rgba(11,18,32,.12);
    --shadow-md:
        4px 4px 0 rgba(0,0,0,.22),
        1px 1px 0 rgba(255,45,85,.14),
        0 0 0 rgba(0,0,0,0);
    --shadow-lg:
        4px 6px 0 rgba(0,0,0,.26),
        2px 2px 0 rgba(53,208,255,.16),
        0 0 0 rgba(0,0,0,0);

    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;

    --transition: 0.15s cubic-bezier(0.2, 0.9, 0.2, 1);
    --heading-weight: 800;
    --body-line-height: 1.7;

    --focus-ring: rgba(53,208,255,.55);
}

body { color: var(--color-text); line-height: var(--body-line-height); }
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 2px 0 rgba(0,0,0,.12),
        4px 4px 0 rgba(0,0,0,.22),
        1px 1px 0 rgba(53,208,255,.14);
    padding: var(--space-card);
    transition: box-shadow var(--transition), transform var(--transition), background-color var(--transition), border-color var(--transition);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), color var(--transition), border-color var(--transition);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

.card:hover, [class*="card"]:hover {
    transform: translateY(-4px);
    box-shadow:
        0 2px 0 rgba(0,0,0,.10),
        6px 6px 0 rgba(0,0,0,.26),
        2px 2px 0 rgba(255,45,85,.18);
}

.hero, [class*="hero"], section:first-of-type {
    background:
        linear-gradient(135deg, #ff2d55 0%, #b4002f 45%, #1a2a6c 100%);
    box-shadow: inset 0 0 0 2px rgba(255,255,255,.16);
}
.card { border: 3px solid rgba(var(--rgb-primary), .22); }

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

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

/* news: grid-4 */
/* 四列紧凑网格 */
                .news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 0.8); }

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

/* testimonials: carousel */
/* 单条轮播 */
                .testimonial-list { display: flex; overflow: hidden; } 
                .testimonial-list > * { flex: 0 0 100%; }

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }

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

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

/* 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; }

/* 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; }
}