:root {
    --color-primary: #3b82f6;
    --color-primary-dark: #1d4ed8;
    --color-accent: #60a5fa;
    --color-surface: #eaf2ff;
    --color-text: #0f172a;
    --rgb-primary: 59,130,246;
    --rgb-accent: 96,165,250;
    --radius-sm: 1px;
    --radius-md: 2px;
    --radius-lg: 3px;
    --radius-xl: 0px;
    --shadow-sm: 4px 4px 0px rgba(15, 23, 42, .22);
    --shadow-md: 4px 4px 0px rgba(15, 23, 42, .26);
    --shadow-lg: 6px 6px 0px rgba(15, 23, 42, .30);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 0.15s cubic-bezier(.2,.9,.2,1);
    --heading-weight: 700;
    --body-line-height: 1.7;
}

body { color: #0f172a; line-height: var(--body-line-height); background: #0b1220; }
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: 3px;
    box-shadow:
        4px 4px 0px rgba(15, 23, 42, .28),
        0px 1px 0px rgba(255,255,255,.06) inset,
        0px -1px 0px rgba(0,0,0,.18) inset;
    padding: var(--space-card);
    transition: var(--transition);
    background:
        linear-gradient(180deg, rgba(234, 242, 255, .98) 0%, rgba(234, 242, 255, .94) 100%);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: 2px;
    transition: var(--transition);
    box-shadow:
        3px 3px 0px rgba(15, 23, 42, .22),
        0 0 0 rgba(0,0,0,0);
}
a:not([class]) { color: #3b82f6; transition: var(--transition); text-decoration-color: rgba(59,130,246,.45); }
a:not([class]):hover { text-decoration-color: rgba(59,130,246,.9); }

section, .section, .card, [class*="card"], header, .header, .navbar {
    filter: saturate(1.02) contrast(1.02);
}

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

/* news: masonry-2 */
/* 两列瀑布流 */
                .news-grid { column-count: 2; column-gap: var(--space-gap); }
                .news-grid .card { break-inside: avoid; margin-bottom: var(--space-gap); }

/* features: horizontal */
/* 水平滚动 */
                .feature-list { display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; }
                .feature-list > * { flex: 0 0 300px; scroll-snap-align: start; }
                .feature-list > * { background-clip: padding-box; }

/* 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); }
.testimonial-list .card { border-color: rgba(15,23,42,.14); }

/* partners: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 20s linear infinite; }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }

/* stats: inline */
/* 水平排列 */
                .stats-grid { display: flex; justify-content: center; gap: 3rem; }

/* cta: card-style */
.cta-inner {
    background:
        linear-gradient(135deg, rgba(234,242,255,.98) 0%, rgba(219, 234, 254, .98) 50%, rgba(186, 210, 255, .96) 100%);
    border-radius: 0px;
    padding: 3rem;
    text-align: center;
    box-shadow:
        4px 4px 0px rgba(15, 23, 42, .30),
        0 0 0 2px rgba(59,130,246,.22) inset,
        0 12px 28px rgba(2, 6, 23, .18);
    border: 1px solid rgba(59,130,246,.22);
}

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

/* 条件性装饰 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-4px);
    box-shadow:
        6px 6px 0px rgba(15, 23, 42, .34),
        0px 2px 0px rgba(255,255,255,.07) inset,
        0px -2px 0px rgba(0,0,0,.22) inset;
}
a:not([class]):hover { color: #60a5fa; }
.hero, [class*="hero"], section:first-of-type {
    background:
        linear-gradient(135deg, #111b34 0%, #0b1220 40%, #0b2a52 100%),
        linear-gradient(135deg, rgba(59,130,246,.55) 0%, rgba(29,78,216,.18) 45%, rgba(96,165,250,.00) 70%);
    box-shadow:
        0 0 0 2px rgba(59,130,246,.18) inset,
        0 24px 60px rgba(2, 6, 23, .25);
    border-bottom: 2px solid rgba(59,130,246,.25);
}
.card { border: 2px solid rgba(var(--rgb-primary), .18); }
header, .header, .navbar {
    box-shadow:
        4px 4px 0px rgba(15, 23, 42, .16),
        0 10px 22px rgba(2, 6, 23, .18);
    background: #0b1220;
    border-bottom: 2px solid rgba(59,130,246,.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; }
}