:root {
    --color-primary: #334155;
    --color-primary-dark: #0b1220;
    --color-accent: #a855f7;
    --color-surface: #f6f7fb;
    --color-text: #0f172a;
    --rgb-primary: 51,65,85;
    --rgb-accent: 168,85,247;
    --radius-sm: 4px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --shadow-sm: 0 6px 14px rgba(2,6,23,.10), 0 1px 0 rgba(2,6,23,.06);
    --shadow-md: 0 14px 30px rgba(2,6,23,.10), 0 2px 0 rgba(2,6,23,.06), 0 0 0 1px rgba(148,163,184,.18);
    --shadow-lg: 0 26px 60px rgba(2,6,23,.16), 0 8px 18px rgba(2,6,23,.10), 0 0 0 1px rgba(148,163,184,.22);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.9rem;
    --transition: 220ms cubic-bezier(.2,.85,.25,1);
    --heading-weight: 850;
    --body-line-height: 1.7;
    --glow: rgba(var(--rgb-accent), .40);
    --glow-strong: rgba(var(--rgb-accent), .65);
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: radial-gradient(1200px 600px at 20% -10%, rgba(168,85,247,.10), transparent 55%), radial-gradient(900px 520px at 90% 10%, rgba(14,165,233,.10), transparent 52%), linear-gradient(180deg, #f8fafc 0%, #f3f4f7 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 1px 0 rgba(255,255,255,.7); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] {
    border-radius: var(--radius-lg);
    background: linear-gradient(180deg, rgba(255,255,255,.96) 0%, rgba(255,255,255,.86) 100%);
    box-shadow:
        0 10px 24px rgba(2,6,23,.10),
        0 2px 0 rgba(2,6,23,.04),
        0 0 0 1px rgba(148,163,184,.20);
    padding: var(--space-card);
    transition: var(--transition);
    position: relative;
}
.card::before, [class*="card"]::before {
    content: "";
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    background:
        radial-gradient(600px 120px at 20% 0%, rgba(var(--rgb-accent),.18), transparent 55%),
        radial-gradient(360px 100px at 90% 10%, rgba(14,165,233,.14), transparent 52%),
        linear-gradient(180deg, rgba(255,255,255,.60) 0%, rgba(255,255,255,0) 60%);
    opacity: .55;
    pointer-events: none;
    z-index: 0;
}
.card > *, [class*="card"] > * { position: relative; z-index: 1; }
.card, [class*="card"] { overflow: hidden; }
.card:hover, [class*="card"]:hover {
    box-shadow:
        0 18px 40px rgba(2,6,23,.14),
        0 0 0 1px rgba(168,85,247,.35),
        0 0 32px rgba(var(--rgb-accent), .22);
    transform: translateY(-1px);
}
.card:focus-within, [class*="card"]:focus-within {
    box-shadow:
        0 18px 40px rgba(2,6,23,.14),
        0 0 0 2px rgba(var(--rgb-accent), .38),
        0 0 28px rgba(var(--rgb-accent), .28);
}
.btn, button[class*="btn"], a[class*="btn"] { 
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow:
        0 10px 22px rgba(2,6,23,.10),
        0 0 0 1px rgba(148,163,184,.22);
}
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover {
    box-shadow:
        0 16px 34px rgba(2,6,23,.14),
        0 0 0 1px rgba(var(--rgb-accent), .32),
        0 0 24px rgba(var(--rgb-accent), .26);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-shadow: 0 1px 0 rgba(255,255,255,.6); }
a:not([class]):hover { color: rgba(var(--rgb-accent), 1); text-shadow: 0 0 18px rgba(var(--rgb-accent), .30); }

/* ========== 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-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }

/* hero: split */
/* 左文右图 */
                .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
                .testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }
.testimonial-list > * { transition: var(--transition); }
.testimonial-list > *:hover { transform: translateY(-1px); filter: saturate(1.05); }

/* 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: 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 30px rgba(var(--rgb-accent), .12); }

/* cta: card-style */
.cta-inner { background: linear-gradient(180deg, rgba(255,255,255,.92) 0%, rgba(246,247,251,.86) 100%); border-radius: var(--radius-xl); padding: 3rem; text-align: center; box-shadow: 0 22px 56px rgba(2,6,23,.14), 0 0 0 1px rgba(168,85,247,.20); position: relative; overflow: hidden; }
.cta-inner::after{
    content:"";
    position:absolute;
    inset:-2px;
    background:
        radial-gradient(900px 240px at 20% 0%, rgba(var(--rgb-accent),.22), transparent 55%),
        radial-gradient(620px 200px at 85% 20%, rgba(14,165,233,.16), transparent 50%),
        linear-gradient(180deg, rgba(255,255,255,.30), rgba(255,255,255,0));
    opacity:.9;
    pointer-events:none;
}
.cta-inner > * { position: relative; z-index: 1; }

/* Page Layout: narrow-centered */
/* 窄版居中 */
            .page-main { max-width: 860px; margin: 0 auto; }

/* 条件性装饰 */
.card { border-left: 3px solid rgba(var(--rgb-accent), .95); }
.card:hover { border-left-color: rgba(var(--rgb-accent), 1); }
header, .header, .navbar { background: transparent; }
header, .header, .navbar { backdrop-filter: blur(10px) saturate(1.1); -webkit-backdrop-filter: blur(10px) saturate(1.1); }

/* 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: 0.9rem; }
    .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; }
}

/* Subtle pulsing glow on hover targets */
@keyframes glowPulse {
    0% { box-shadow: 0 14px 30px rgba(2,6,23,.10), 0 2px 0 rgba(2,6,23,.06), 0 0 0 1px rgba(148,163,184,.18); }
    50% { box-shadow: 0 18px 40px rgba(2,6,23,.13), 0 0 0 1px rgba(var(--rgb-accent), .34), 0 0 34px rgba(var(--rgb-accent), .22); }
    100% { box-shadow: 0 14px 30px rgba(2,6,23,.10), 0 2px 0 rgba(2,6,23,.06), 0 0 0 1px rgba(148,163,184,.18); }
}
.card:hover, [class*="card"]:hover { animation: glowPulse 1.15s ease-in-out both; }
.cta-inner:hover { animation: glowPulse 1.2s ease-in-out both; }