:root {
    --color-primary: #8b5cf6;
    --color-primary-dark: #0b0a14;
    --color-accent: #fbbf24;
    --color-surface: #0f172a;
    --color-text: #e9e7ff;
    --rgb-primary: 139,92,246;
    --rgb-accent: 251,191,36;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 18px;

    --shadow-sm:
        0 1px 0 rgba(0,0,0,.25),
        0 10px 25px rgba(0,0,0,.18);

    --shadow-md:
        0 10px 28px rgba(0,0,0,.30),
        0 0 0 1px rgba(var(--rgb-accent), .10),
        0 0 24px rgba(var(--rgb-primary), .12);

    --shadow-lg:
        0 18px 50px rgba(0,0,0,.40),
        0 0 0 1px rgba(var(--rgb-accent), .14),
        0 0 36px rgba(var(--rgb-primary), .16),
        0 0 22px rgba(251,191,36, .08);

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

    --transition: 200ms cubic-bezier(.2,.8,.2,1);

    --heading-weight: 700;
    --body-line-height: 1.7;

    --glass: rgba(255,255,255,.04);
    --glass-strong: rgba(255,255,255,.06);
}

body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background:
        radial-gradient(900px 420px at 50% -80px, rgba(var(--rgb-primary), .22) 0%, rgba(0,0,0,0) 60%),
        radial-gradient(700px 360px at 15% 10%, rgba(var(--rgb-accent), .14) 0%, rgba(0,0,0,0) 55%),
        radial-gradient(800px 420px at 85% 20%, rgba(139,92,246,.14) 0%, rgba(0,0,0,0) 55%),
        #0f0f1a;
}

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);
    background:
        linear-gradient(180deg, rgba(255,255,255,.06) 0%, rgba(255,255,255,.02) 100%),
        radial-gradient(600px 240px at 50% 0%, rgba(var(--rgb-accent), .10) 0%, rgba(0,0,0,0) 55%);
    border: 1px solid rgba(var(--rgb-primary), .14);
    box-shadow:
        0 10px 28px rgba(0,0,0,.34),
        0 0 0 1px rgba(var(--rgb-accent), .10),
        0 0 24px rgba(var(--rgb-primary), .14);
    transition: var(--transition);
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    border: 1px solid rgba(var(--rgb-accent), .18);
    box-shadow:
        0 10px 26px rgba(0,0,0,.28),
        0 0 22px rgba(var(--rgb-primary), .10);
}

a:not([class]) {
    color: rgba(233,231,255,.92);
    transition: var(--transition);
    text-decoration: none;
}

a:not([class]):focus {
    outline: 2px solid rgba(var(--rgb-accent), .55);
    outline-offset: 3px;
    border-radius: 10px;
}

a:not([class]):hover { color: rgba(var(--rgb-accent), .95); }

.card { border: 1px solid rgba(var(--rgb-primary), .14); }

header, .header, .navbar {
    box-shadow:
        0 10px 28px rgba(0,0,0,.35),
        0 0 0 1px rgba(251,191,36,.08),
        0 0 24px rgba(139,92,246,.14);
    background: rgba(15,15,26,.55);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

@keyframes glowPulse {
    0% { filter: drop-shadow(0 0 0 rgba(var(--rgb-accent), .0)); }
    45% { filter: drop-shadow(0 0 18px rgba(var(--rgb-accent), .28)); }
    100% { filter: drop-shadow(0 0 0 rgba(var(--rgb-accent), .0)); }
}

.card:hover, [class*="card"]:hover {
    box-shadow:
        0 16px 48px rgba(0,0,0,.45),
        0 0 0 1px rgba(var(--rgb-accent), .18),
        0 0 32px rgba(var(--rgb-accent), .22),
        0 0 38px rgba(var(--rgb-primary), .18);
    animation: glowPulse 1.6s ease-in-out infinite;
}

section, .section { color: var(--color-text); }

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

/* news: featured-left */
/* 左大右小 (1大+2小) */
                .news-grid { display: grid; grid-template-columns: 2fr 1fr; grid-template-rows: auto auto; gap: var(--space-gap); }
                .news-grid > *:first-child { grid-row: span 2; }

/* 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; }

/* hero: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; }

/* testimonials: grid-3 */
.testimonial-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

/* 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-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: card-style */
.cta-inner {
    background:
        radial-gradient(900px 320px at 50% -40px, rgba(var(--rgb-accent), .22) 0%, rgba(0,0,0,0) 60%),
        linear-gradient(180deg, rgba(255,255,255,.08) 0%, rgba(255,255,255,.02) 100%);
    border-radius: var(--radius-xl);
    padding: 3rem;
    text-align: center;
    border: 1px solid rgba(var(--rgb-accent), .18);
    box-shadow:
        0 18px 60px rgba(0,0,0,.42),
        0 0 0 1px rgba(var(--rgb-primary), .14),
        0 0 36px rgba(var(--rgb-accent), .16);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* 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; }
}