:root {
    --color-primary: #0b2a6f;
    --color-primary-dark: #061a44;
    --color-accent: #2dd4bf;
    --color-surface: #f5fbff;
    --color-text: #0d1b2a;
    --rgb-primary: 11,42,111;
    --rgb-accent: 45,212,191;

    --sidebar-bg: #252e3a;
    --sidebar-2: #1c2530;

    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 26px;
    --radius-xl: 36px;

    --shadow-sm:
        0 1px 0 rgba(255,255,255,.55),
        0 8px 18px rgba(3, 10, 30, .08);
    --shadow-md:
        0 2px 0 rgba(255,255,255,.35),
        0 10px 28px rgba(2, 10, 30, .12),
        0 2px 6px rgba(2, 10, 30, .08);
    --shadow-lg:
        0 1px 0 rgba(255,255,255,.22),
        0 18px 45px rgba(2, 10, 30, .16),
        0 7px 18px rgba(2, 10, 30, .10),
        0 0 0 1px rgba(45, 212, 191, .10);

    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;

    --transition: 0.52s cubic-bezier(.2,.8,.2,1);
    --heading-weight: 700;
    --body-line-height: 1.65;
}

body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background:
        radial-gradient(1000px 600px at 18% 0%, rgba(45, 212, 191, .12), rgba(45, 212, 191, 0) 55%),
        radial-gradient(800px 500px at 80% 10%, rgba(11, 42, 111, .18), rgba(11, 42, 111, 0) 50%),
        linear-gradient(180deg, #f8fdff, #f3f8ff);
}

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 1px 0 rgba(255,255,255,.35),
        0 16px 40px rgba(3, 10, 30, .12),
        0 6px 18px rgba(3, 10, 30, .08),
        0 0 0 1px rgba(11, 42, 111, .08);
    padding: var(--space-card);
    transition: var(--transition);
    background:
        radial-gradient(900px 180px at 15% 0%, rgba(45, 212, 191, .12), rgba(45, 212, 191, 0) 60%),
        linear-gradient(180deg, rgba(255,255,255,.92), rgba(255,255,255,.78));
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow:
        0 10px 22px rgba(2, 10, 30, .10),
        0 0 0 1px rgba(45, 212, 191, .22);
}

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

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

/* news: grid-4 */
/* 四列紧凑网格 */
                .news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 0.8); }

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

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

/* 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(-5px);
    box-shadow:
        0 1px 0 rgba(255,255,255,.20),
        0 22px 60px rgba(3, 10, 30, .18),
        0 10px 26px rgba(3, 10, 30, .12),
        0 0 0 1px rgba(45, 212, 191, .26);
}
.hero, [class*="hero"], section:first-of-type {
    background:
        radial-gradient(1000px 380px at 20% 20%, rgba(45, 212, 191, .22), rgba(45, 212, 191, 0) 58%),
        radial-gradient(900px 320px at 85% 0%, rgba(11, 42, 111, .40), rgba(11, 42, 111, 0) 54%),
        linear-gradient(135deg, #1c2f6f, #252e3a 55%, #0b2a6f);
}
.card { border-left: 3px solid color-mix(in srgb, var(--color-accent) 78%, var(--color-primary) 22%); }

/* 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; }
}