:root {
    --color-primary: #6d28d9;
    --color-primary-dark: #3b1b72;
    --color-accent: #f5c542;
    --color-surface: #eef2ff;
    --color-text: #e7e9ff;

    --rgb-primary: 109,40,217;
    --rgb-accent: 245,197,66;

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 22px;

    --shadow-sm: 0 2px 6px rgba(0,0,0,.18);

    --shadow-md:
        0 6px 14px rgba(0,0,0,.22),
        0 2px 6px rgba(0,0,0,.14);

    --shadow-lg:
        0 10px 28px rgba(0,0,0,.28),
        0 22px 60px -22px rgba(109,40,217,.55),
        0 1px 0 rgba(255,255,255,.06) inset;

    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;

    --transition: 0.45s cubic-bezier(.2,.8,.2,1);

    --heading-weight: 800;
    --body-line-height: 1.65;
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background:
        radial-gradient(900px 520px at 50% -10%, rgba(245,197,66,.12), transparent 58%),
        radial-gradient(720px 520px at 15% 10%, rgba(109,40,217,.16), transparent 55%),
        radial-gradient(760px 520px at 85% 15%, rgba(59,27,114,.22), transparent 60%),
        #0f0f1a;
    caret-color: var(--color-accent);
    accent-color: var(--color-accent);
}

h1, h2, h3, h4 { font-weight: var(--heading-weight); }

section, .section {
    padding-top: var(--space-section);
    padding-bottom: var(--space-section);
    text-align: center;
}

.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow:
        0 4px 10px rgba(0,0,0,.22),
        0 18px 40px -16px rgba(0,0,0,.55),
        0 0 0 1px rgba(245,197,66,.10) inset,
        0 0 0 0 rgba(109,40,217,0);
    padding: var(--space-card);
    transition: var(--transition);
    background:
        radial-gradient(1200px 300px at 50% 0%, rgba(245,197,66,.10), transparent 45%),
        linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
    backdrop-filter: blur(10px);
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    outline-color: rgba(245,197,66,.55);
    text-shadow: 0 1px 0 rgba(0,0,0,.35);
}

a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-shadow: 0 0 18px rgba(109,40,217,.16);
}

a:not([class]):hover {
    color: var(--color-accent);
}

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

/* 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; }

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

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); 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; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-4px);
    box-shadow:
        0 10px 24px rgba(0,0,0,.26),
        0 34px 80px -28px rgba(0,0,0,.70),
        0 0 0 1px rgba(245,197,66,.16) inset,
        0 0 0 6px rgba(109,40,217,.10);
}

.hero, [class*="hero"], section:first-of-type {
    background:
        radial-gradient(900px 420px at 50% 0%, rgba(245,197,66,.18), transparent 55%),
        radial-gradient(740px 520px at 18% 25%, rgba(109,40,217,.28), transparent 60%),
        radial-gradient(640px 520px at 85% 30%, rgba(59,27,114,.45), transparent 62%),
        linear-gradient(135deg, #0b0b18, #0f0f1a 35%, #3b1b72);
}

.card { border-left: 3px solid var(--color-accent); }

header, .header, .navbar {
    background: transparent;
    border-color: rgba(245,197,66,.16);
    backdrop-filter: blur(6px);
}

/* 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; }
}