:root {
    --color-primary: #1f2a44;
    --color-primary-dark: #121a2f;
    --color-accent: #7c3aed;
    --color-surface: #fff7e6;
    --color-text: #0f172a;
    --rgb-primary: 31,42,68;
    --rgb-accent: 124,58,237;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --shadow-sm: 0 1px 0 rgba(15, 23, 42, .08), 0 8px 18px rgba(124, 58, 237, .12);
    --shadow-md: 0 10px 28px rgba(15, 23, 42, .12), 0 2px 10px rgba(124, 58, 237, .14), 0 0 0 1px rgba(124, 58, 237, .10) inset;
    --shadow-lg: 0 18px 45px rgba(15, 23, 42, .16), 0 8px 22px rgba(124, 58, 237, .16), 0 0 0 1px rgba(124, 58, 237, .12) inset;
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 180ms cubic-bezier(.2,.9,.2,1);
    --heading-weight: 700;
    --body-line-height: 1.7;
}

body { color: var(--color-text); line-height: var(--body-line-height); }
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 0 0 1px rgba(124, 58, 237, .12) inset,
        0 18px 38px rgba(2, 6, 23, .16),
        0 10px 20px rgba(124, 58, 237, .10),
        0 1px 0 rgba(255,255,255,.35) inset;
    padding: var(--space-card);
    transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition), filter var(--transition);
    will-change: transform;
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: background-color var(--transition), box-shadow var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
}

a:not([class]) {
    color: #4f46e5;
    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: list-view */
/* 列表模式 (图左文右) */
                .news-grid { display: flex; flex-direction: column; gap: var(--space-gap); }
                .news-grid .card { display: grid; grid-template-columns: 280px 1fr; }

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

/* testimonials: carousel */
/* 单条轮播 */
                .testimonial-list { display: flex; overflow: hidden; } 
                .testimonial-list > * { flex: 0 0 100%; }

/* partners: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 22s 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: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: card-style */
.cta-inner {
    background:
        radial-gradient(900px circle at 10% 10%, rgba(124, 58, 237, .16), transparent 55%),
        radial-gradient(700px circle at 90% 0%, rgba(99, 102, 241, .12), transparent 55%),
        linear-gradient(180deg, #fff3d6, #fff7e6);
    border-radius: var(--radius-xl);
    padding: 3rem;
    text-align: center;
    box-shadow:
        0 0 0 1px rgba(124, 58, 237, .12) inset,
        0 22px 50px rgba(2, 6, 23, .14),
        0 10px 26px rgba(124, 58, 237, .14);
}

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
            .page-main { max-width: 1200px; margin: 0 auto; }

/* 条件性装饰 */
.hero, [class*="hero"], section:first-of-type {
    background:
        linear-gradient(90deg, rgba(255, 247, 230, .92) 0%, rgba(255, 247, 230, .92) 24%, transparent 24%, transparent 26%),
        linear-gradient(135deg, #ffffff 0%, #fff2d9 26%, rgba(124, 58, 237, .10) 60%, #1f2a44 120%);
    box-shadow:
        0 0 0 1px rgba(124, 58, 237, .10) inset,
        0 24px 70px rgba(2, 6, 23, .12);
    animation: stripGlowPulse 6.5s ease-in-out infinite;
}

@keyframes stripGlowPulse {
    0%, 100% { filter: saturate(1) brightness(1); }
    50% { filter: saturate(1.1) brightness(1.03); }
}

.card { border: 1px solid rgba(var(--rgb-primary), .10); }

header, .header, .navbar {
    box-shadow:
        0 12px 30px rgba(2, 6, 23, .10),
        0 0 0 1px rgba(124, 58, 237, .10) inset,
        0 0 26px rgba(124, 58, 237, .18);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    background: rgba(255,255,255,.55);
    border-radius: 14px;
}

/* 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; }
}