:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #2e1065;
    --color-accent: #f59e0b;
    --color-surface: #fefce8;
    --color-text: #f5f3ff;
    --rgb-primary: 124,58,237;
    --rgb-accent: 245,158,11;
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 28px;
    --radius-xl: 40px;
    --shadow-sm: 0 10px 22px rgba(0,0,0,.12);
    --shadow-md: 0 18px 40px rgba(2,6,23,.35), 0 2px 10px rgba(2,6,23,.22), inset 0 1px 0 rgba(255,255,255,.06);
    --shadow-lg: 0 26px 70px rgba(2,6,23,.50), 0 10px 28px rgba(2,6,23,.30), 0 1px 0 rgba(255,255,255,.08) inset;
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 0.55s cubic-bezier(0.16, 1, 0.3, 1);
    --heading-weight: 800;
    --body-line-height: 1.65;
}

body { color: var(--color-text); line-height: var(--body-line-height); background:
    radial-gradient(1200px 700px at 50% -10%, rgba(124,58,237,.30) 0%, rgba(124,58,237,0) 55%),
    radial-gradient(900px 520px at 15% 10%, rgba(245,158,11,.20) 0%, rgba(245,158,11,0) 60%),
    radial-gradient(850px 520px at 90% 30%, rgba(59,130,246,.12) 0%, rgba(59,130,246,0) 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);
    box-shadow:
        0 18px 55px rgba(0,0,0,.42),
        0 2px 14px rgba(0,0,0,.28),
        inset 0 1px 0 rgba(255,255,255,.08),
        inset 0 -1px 0 rgba(255,255,255,.03);
    padding: var(--space-card);
    transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition), background var(--transition);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: transform var(--transition), box-shadow var(--transition), color var(--transition), background var(--transition), border-color var(--transition);
}
a:not([class]) {
    color: #d8b4fe;
    transition: color var(--transition), filter var(--transition), text-shadow var(--transition);
}
a:not([class]):focus, a:not([class]) { text-shadow: 0 0 0 rgba(0,0,0,0); }
a:not([class]) { text-shadow: 0 0 0 rgba(0,0,0,0); }

/* ========== 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: centered */
/* 居中大卡片 */
                .feature-list { display: flex; flex-direction: column; align-items: center; gap: calc(var(--space-gap) * 2); max-width: 720px; margin: 0 auto; }

/* 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-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }

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

/* 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 34px 90px rgba(0,0,0,.58),
        0 12px 34px rgba(0,0,0,.36),
        0 0 0 1px rgba(245,158,11,.18),
        inset 0 1px 0 rgba(255,255,255,.10),
        inset 0 -1px 0 rgba(255,255,255,.04);
}
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 18px rgba(245,158,11,.35); }
.hero, [class*="hero"], section:first-of-type {
    background:
        radial-gradient(900px 520px at 20% 10%, rgba(245,158,11,.22) 0%, rgba(245,158,11,0) 55%),
        radial-gradient(1000px 650px at 85% 30%, rgba(124,58,237,.35) 0%, rgba(124,58,237,0) 58%),
        linear-gradient(135deg, #0f0f1a 0%, rgba(124,58,237,.55) 35%, rgba(46,16,101,.70) 60%, rgba(245,158,11,.35) 100%);
}
.card { border: 1px solid rgba(var(--rgb-primary), .16); }

header, .header, .navbar {
    box-shadow:
        0 10px 30px rgba(0,0,0,.45),
        0 2px 10px rgba(0,0,0,.20),
        inset 0 1px 0 rgba(255,255,255,.06);
    background:
        linear-gradient(180deg, rgba(15,15,26,.62) 0%, rgba(15,15,26,.40) 100%);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(245,158,11,.14);
}

/* 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; --radius-lg: 26px; --radius-xl: 34px; }
    .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; }
}