:root {
    --color-primary: #0B4F6C;
    --color-primary-dark: #063548;
    --color-accent: #FFB000;
    --color-surface: #EAF7FF;
    --color-text: #0D1B22;

    --rgb-primary: 11,79,108;
    --rgb-accent: 255,176,0;

    --radius-sm: 2px;
    --radius-md: 3px;
    --radius-lg: 4px;
    --radius-xl: 6px;

    --shadow-sm: 4px 4px 0px rgba(6,53,72,.25), 0 0 0 2px rgba(255,176,0,.10);
    --shadow-md: 4px 4px 0px rgba(6,53,72,.28), 10px 12px 0px rgba(11,79,108,.10);
    --shadow-lg: 4px 4px 0px rgba(6,53,72,.34), 14px 18px 0px rgba(11,79,108,.12), 0 18px 45px rgba(6,53,72,.18);

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

    --transition: 0.15s cubic-bezier(0.2, 0.9, 0.2, 1);

    --heading-weight: 700;
    --body-line-height: 1.65;
}

/* 基础覆盖 */
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: var(--shadow-md); padding: var(--space-card); transition: var(--transition); border: 2px solid rgba(6,53,72,.28); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); border: 2px solid rgba(6,53,72,.28); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-color: rgba(255,176,0,.55); }

.card:hover, [class*="card"]:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.hero, [class*="hero"], section:first-of-type { background: radial-gradient(1200px 600px at 10% 10%, rgba(255,176,0,.22), rgba(255,176,0,0) 55%), linear-gradient(135deg, #0B4F6C 0%, #063548 55%, #092F3D 100%); }
.card { border: 2px solid rgba(255,176,0,.22); }

:focus, :focus-visible { outline: 3px solid rgba(255,176,0,.55); outline-offset: 2px; }

.hero { text-shadow: 0 2px 0 rgba(255,176,0,.22); }
.card { text-shadow: 0 1px 0 rgba(255,255,255,.35); }

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

/* news: masonry-2 */
/* 两列瀑布流 */
                .news-grid { column-count: 2; column-gap: var(--space-gap); }
                .news-grid .card { break-inside: avoid; margin-bottom: var(--space-gap); border-color: rgba(6,53,72,.30); box-shadow: 4px 4px 0px rgba(6,53,72,.26), 0 0 0 2px rgba(255,176,0,.10); }

/* features: grid-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }
.feature-list .card { border-radius: 4px; border-color: rgba(6,53,72,.28); box-shadow: 4px 4px 0px rgba(6,53,72,.26), 0 10px 0 rgba(11,79,108,.08); transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition); }

/* hero: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; }

/* testimonials: carousel */
/* 单条轮播 */
                .testimonial-list { display: flex; overflow: hidden; } 
                .testimonial-list > * { flex: 0 0 100%; }
                .testimonial-list .card { background: rgba(234,247,255,.95); backdrop-filter: blur(2px); -webkit-backdrop-filter: blur(2px); }

/* 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 .card { border-radius: var(--radius-sm); box-shadow: 4px 4px 0px rgba(6,53,72,.22); border-color: rgba(255,176,0,.18); }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }
.faq-list .card { border-radius: 3px; border-style: solid; border-color: rgba(6,53,72,.28); box-shadow: 4px 4px 0px rgba(6,53,72,.26), 0 0 0 2px rgba(11,79,108,.10); }

/* 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; color: #063548; text-shadow: 4px 4px 0 rgba(255,176,0,.20); }
                .stats-grid .stat-value::selection { background: rgba(255,176,0,.35); }
                .stats-grid .card { background: linear-gradient(180deg, rgba(234,247,255,.98), rgba(234,247,255,.85)); border-color: rgba(255,176,0,.20); }

/* cta: card-style */
.cta-inner { background: linear-gradient(135deg, rgba(234,247,255,.96) 0%, rgba(234,247,255,.80) 60%), radial-gradient(900px 360px at 80% 20%, rgba(255,176,0,.25), rgba(255,176,0,0) 55%); border-radius: var(--radius-xl); padding: 3rem; text-align: center; border: 3px solid rgba(6,53,72,.28); box-shadow: 4px 4px 0px rgba(6,53,72,.28), 0 18px 55px rgba(6,53,72,.14); transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition); }
.cta-inner:hover { box-shadow: var(--shadow-lg); border-color: rgba(255,176,0,.32); }

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

/* 条件性装饰 */
.btn:hover, button[class*="btn"]:hover { box-shadow: 4px 4px 0px rgba(6,53,72,.30); border-color: rgba(255,176,0,.45); }
a:not([class]):hover { color: #074861; }
a:not([class]):focus-visible { outline-color: rgba(255,176,0,.65); }

@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; }
}