:root {
    --color-primary: #0b3d4a;
    --color-primary-dark: #062531;
    --color-accent: #6d28d9;
    --color-surface: #f3f7ff;
    --color-text: #0f172a;
    --rgb-primary: 11,61,74;
    --rgb-accent: 109,40,217;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 16px;
    --radius-xl: 22px;

    --shadow-sm:
        0 1px 0 rgba(15, 23, 42, 0.06),
        0 6px 14px rgba(0, 0, 0, 0.08);
    --shadow-md:
        0 10px 26px rgba(2, 6, 23, 0.14),
        0 2px 0 rgba(255, 255, 255, 0.55) inset,
        0 0 0 1px rgba(2, 132, 199, 0.10) inset;
    --shadow-lg:
        0 22px 55px rgba(2, 6, 23, 0.22),
        0 6px 18px rgba(109, 40, 217, 0.18),
        0 0 0 1px rgba(109, 40, 217, 0.16) inset;

    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 220ms cubic-bezier(.2,.8,.2,1);
    --heading-weight: 650;
    --body-line-height: 1.7;
}

body { color: var(--color-text); line-height: var(--body-line-height); background:
    radial-gradient(1200px 500px at 15% 0%, rgba(109,40,217,.10), transparent 55%),
    radial-gradient(900px 420px at 90% 10%, rgba(2,132,199,.10), transparent 50%),
    linear-gradient(180deg, rgba(243,247,255,1) 0%, rgba(255,255,255,1) 45%, rgba(243,247,255,.8) 100%);
}
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);
    padding: var(--space-card);
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        border-color var(--transition),
        background-color var(--transition),
        filter var(--transition);
    box-shadow:
        0 16px 40px rgba(2, 6, 23, 0.16),
        0 2px 0 rgba(255, 255, 255, 0.55) inset,
        0 0 0 1px rgba(109, 40, 217, 0.12) inset,
        0 0 22px rgba(109, 40, 217, 0.10);
    background:
        radial-gradient(800px 260px at 20% 0%, rgba(109,40,217,.14), transparent 60%),
        radial-gradient(700px 260px at 90% 15%, rgba(2,132,199,.12), transparent 55%),
        linear-gradient(180deg, rgba(255,255,255,.88) 0%, rgba(255,255,255,.76) 100%);
}
.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), filter var(--transition), border-color var(--transition);
}
a:not([class]) {
    color: var(--color-primary);
    transition: color var(--transition), text-shadow var(--transition), filter var(--transition);
    text-shadow: 0 0 0 rgba(0,0,0,0);
}

/* ========== 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: 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::-webkit-scrollbar { height: 10px; }
                .feature-list::-webkit-scrollbar-thumb {
                    background: linear-gradient(180deg, rgba(109,40,217,.55), rgba(2,132,199,.35));
                    border-radius: 999px;
                    border: 2px solid rgba(255,255,255,.6);
                }
                .feature-list::-webkit-scrollbar-track { background: rgba(15,23,42,.06); border-radius: 999px; }

/* hero: overlay */
/* 全屏背景+文字覆盖 */
                .hero { position: relative; min-height: 70vh; display: flex; align-items: center; }
                .hero-content { position: relative; z-index: 1; }
                .hero::before{
                    content:"";
                    position:absolute;
                    inset:-10%;
                    background:
                        radial-gradient(900px 420px at 20% 10%, rgba(109,40,217,.18), transparent 55%),
                        radial-gradient(800px 380px at 85% 25%, rgba(244,63,94,.14), transparent 50%),
                        radial-gradient(650px 340px at 60% 80%, rgba(2,132,199,.14), transparent 55%),
                        linear-gradient(180deg, rgba(243,247,255,.35) 0%, rgba(255,255,255,.15) 100%);
                    filter: blur(6px);
                    opacity: .95;
                    pointer-events:none;
                }

/* 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; }
.partner-grid .card, .partner-grid [class*="card"]{
    box-shadow:
        0 14px 34px rgba(2, 6, 23, 0.14),
        0 0 0 1px rgba(2,132,199,.14) inset,
        0 0 18px rgba(2,132,199,.10);
}

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

/* 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; }
                .stats-grid .stat-value, .stats-grid .card .stat-value {
                    letter-spacing: -0.02em;
                    text-shadow: 0 10px 32px rgba(109,40,217,.18);
                }

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }

/* 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(-6px);
    box-shadow:
        0 28px 70px rgba(2, 6, 23, 0.24),
        0 10px 25px rgba(109, 40, 217, 0.24),
        0 0 0 1px rgba(109, 40, 217, 0.26) inset,
        0 0 38px rgba(109, 40, 217, 0.28);
    filter: saturate(1.05);
}
a:not([class]):hover {
    color: #4f46e5;
    text-shadow:
        0 0 18px rgba(109,40,217,.35),
        0 2px 0 rgba(255,255,255,.35);
}
.card { border-left: 3px solid rgba(11,61,74,.95); }

/* Subtle pulsing glow (kept conservative; only affects cards that are already elevated on hover/focus) */
.card:hover, .card:focus-visible, [class*="card"]:hover, [class*="card"]:focus-visible {
    animation: glowPulse 1.35s ease-in-out infinite;
}
@keyframes glowPulse {
    0%, 100% {
        box-shadow:
            0 28px 70px rgba(2, 6, 23, 0.24),
            0 10px 25px rgba(109, 40, 217, 0.24),
            0 0 0 1px rgba(109, 40, 217, 0.26) inset,
            0 0 34px rgba(109, 40, 217, 0.24);
    }
    50% {
        box-shadow:
            0 30px 76px rgba(2, 6, 23, 0.26),
            0 12px 32px rgba(109, 40, 217, 0.30),
            0 0 0 1px rgba(109, 40, 217, 0.30) inset,
            0 0 46px rgba(109, 40, 217, 0.34);
    }
}

/* 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; }
    .card, [class*="card"] { border-radius: 14px; }
}