:root {
    --color-primary: #2f6fdb;
    --color-primary-dark: #2158a6;
    --color-accent: #ff6a2a;
    --color-surface: #eef2f7;
    --color-text: #0f172a;
    --rgb-primary: 47,111,219;
    --rgb-accent: 255,106,42;
    --radius-sm: 2px;
    --radius-md: 3px;
    --radius-lg: 4px;
    --radius-xl: 6px;
    --shadow-sm: none;
    --shadow-md: none;
    --shadow-lg: none;
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 220ms cubic-bezier(0.2, 0, 0.2, 1);
    --heading-weight: 700;
    --body-line-height: 1.75;
}

body { color: var(--color-text); line-height: var(--body-line-height); background: #f6f8fb; }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: #0b1220; }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] {
    border-radius: var(--radius-xl);
    box-shadow: none;
    padding: var(--space-card);
    transition: var(--transition);
    background: #ffffff;
    border: 1px solid #d7e0ee;
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    border: 1px solid #cfe0ff;
    background: #ffffff;
    color: #0f3a7a;
}
a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-decoration: none;
    outline: none;
}
a:not([class]):hover { color: var(--color-primary-dark); }

.card:focus, [class*="card"]:focus,
.btn:focus, button[class*="btn"]:focus, a[class*="btn"]:focus,
a:not([class]):focus {
    outline: 2px solid #9cc2ff;
    outline-offset: 2px;
}

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

/* news: featured-top */
/* 首篇横跨全宽 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
                .news-grid > *:first-child { grid-column: span 3; }
                .news-grid > * { background: #ffffff; border: 1px solid #d7e0ee; border-radius: var(--radius-lg); }
                .news-grid > * > * { color: #0f172a; }

/* features: grid-3 */
.feature-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
.feature-list > * { background: #ffffff; border: 1px solid #d7e0ee; border-radius: var(--radius-lg); }

/* 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; }
                .hero::before {
                    content: "";
                    position: absolute;
                    inset: 0;
                    background: #151f2e;
                    opacity: 0.96;
                }
                .hero::after {
                    content: "";
                    position: absolute;
                    inset: -1px;
                    border: 1px solid #2c3a52;
                    pointer-events: none;
                }
                .hero-content { color: #f3f6ff; }
                .hero-content a:not([class]) { color: #9cc2ff; }
                .hero-content a:not([class]):hover { color: #cfe0ff; }

/* testimonials: grid-3 */
.testimonial-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
.testimonial-list > * { background: #ffffff; border: 1px solid #d7e0ee; border-radius: var(--radius-lg); }

/* partners: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 20s linear infinite; }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }
                .partner-grid > * {
                    border: 1px solid #d7e0ee;
                    border-radius: var(--radius-md);
                    background: #ffffff;
                    color: #0f172a;
                }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }
.faq-list > * { background: #ffffff; border: 1px solid #d7e0ee; border-radius: var(--radius-lg); }

/* stats: inline */
/* 水平排列 */
                .stats-grid { display: flex; justify-content: center; gap: 3rem; }
                .stats-grid > * {
                    background: #ffffff;
                    border: 1px solid #d7e0ee;
                    border-radius: var(--radius-md);
                    color: #0f172a;
                }

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }
.cta-inner { color: #0f172a; }
.cta-inner a:not([class]) { color: var(--color-accent); }
.cta-inner a:not([class]):hover { color: #e45514; }

/* Page Layout: narrow-centered */
/* 窄版居中 */
            .page-main { max-width: 860px; margin: 0 auto; }

/* 条件性装饰 */

:focus-visible {
    outline: 2px solid #9cc2ff;
    outline-offset: 2px;
}

@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; }
    .hero::before { opacity: 0.98; }
}