:root {
    --color-primary: #0b3a62;
    --color-primary-dark: #072a45;
    --color-accent: #7c3aed;
    --color-surface: #f6fbff;
    --color-text: #0b1220;

    --rgb-primary: 11,58,98;
    --rgb-accent: 124,58,237;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;

    --shadow-sm:
        0 1px 0 rgba(9, 18, 32, .08),
        0 10px 22px rgba(11, 58, 98, .10);
    --shadow-md:
        0 10px 28px rgba(6, 26, 45, .14),
        0 2px 8px rgba(124, 58, 237, .10),
        0 1px 0 rgba(9, 18, 32, .08);
    --shadow-lg:
        0 18px 46px rgba(6, 26, 45, .18),
        0 6px 18px rgba(124, 58, 237, .14),
        0 1px 0 rgba(9, 18, 32, .10);

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

    --transition: 0.52s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 650;
    --body-line-height: 1.65;
}

body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background:
        radial-gradient(1200px 600px at 18% -10%, rgba(124, 58, 237, .12) 0%, rgba(124, 58, 237, 0) 55%),
        radial-gradient(900px 520px at 88% 0%, rgba(11, 58, 98, .14) 0%, rgba(11, 58, 98, 0) 52%),
        linear-gradient(180deg, #f8fbff 0%, var(--color-surface) 60%, #f7fbff 100%);
}

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

section, .section {
    padding-top: var(--space-section);
    padding-bottom: var(--space-section);
    background:
        linear-gradient(180deg, rgba(255,255,255,.0) 0%, rgba(255,255,255,.0) 40%, rgba(11,58,98,.03) 100%);
}

.card, [class*="card"] {
    border-radius: var(--radius-lg);
    padding: var(--space-card);
    transition: var(--transition);
    box-shadow:
        0 1px 0 rgba(9, 18, 32, .08),
        0 10px 28px rgba(6, 26, 45, .14),
        0 2px 10px rgba(124, 58, 237, .08);
    background:
        radial-gradient(1000px 420px at 12% 0%, rgba(124, 58, 237, .14) 0%, rgba(124, 58, 237, 0) 50%),
        radial-gradient(900px 460px at 95% 15%, rgba(11, 58, 98, .18) 0%, rgba(11, 58, 98, 0) 52%),
        linear-gradient(180deg, rgba(255,255,255,.92) 0%, rgba(246, 251, 255, .96) 100%);
    border: 1px solid rgba(11, 58, 98, .10);
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow:
        0 1px 0 rgba(9, 18, 32, .10),
        0 12px 30px rgba(6, 26, 45, .14),
        0 2px 10px rgba(124, 58, 237, .10);
}

a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-shadow:
        0 1px 0 rgba(255,255,255,.35),
        0 0 20px rgba(11, 58, 98, .06);
}

.card:hover, [class*="card"]:hover {
    transform: translateY(-4px);
    box-shadow:
        0 1px 0 rgba(9, 18, 32, .12),
        0 18px 52px rgba(6, 26, 45, .20),
        0 10px 22px rgba(124, 58, 237, .18);
    border-color: rgba(124, 58, 237, .22);
}

a:not([class]):hover {
    color: var(--color-accent);
    text-shadow:
        0 1px 0 rgba(255,255,255,.45),
        0 0 26px rgba(124, 58, 237, .22);
}

/* ========== 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: 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: minimal */
.hero { padding: 2rem 0; } .hero-content { max-width: 560px; }

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

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

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }

/* 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; }

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

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

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
a:not([class]):hover { color: var(--color-accent); }

/* 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; }
}