:root {
    --color-primary: #0b3b5a;
    --color-primary-dark: #02111f;
    --color-accent: #ff3b7a;
    --color-surface: #f6f7fb;
    --color-text: #0b1220;
    --rgb-primary: 11,59,90;
    --rgb-accent: 255,59,122;
    --radius-sm: 4px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --shadow-sm: 0 0 0 rgba(0,0,0,0);
    --shadow-md: 0 1px 0 rgba(2,17,31,.06), 0 6px 18px rgba(2,17,31,.08);
    --shadow-lg: 0 2px 0 rgba(2,17,31,.08), 0 10px 26px rgba(2,17,31,.14);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 165ms cubic-bezier(.2,.9,.2,1);
    --heading-weight: 800;
    --body-line-height: 1.7;
}

body { color: var(--color-text); line-height: var(--body-line-height); background: radial-gradient(1200px 600px at 10% -10%, rgba(var(--rgb-accent), .10), transparent 55%), radial-gradient(900px 500px at 95% 0%, rgba(56,189,248,.12), transparent 60%), var(--color-surface); }
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(2,17,31,.06), 0 10px 24px rgba(2,17,31,.10); padding: var(--space-card); transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition), background-color var(--transition); background: linear-gradient(180deg, rgba(255,255,255,.86), rgba(255,255,255,.72)); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: background-color var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }
a:not([class]):hover { text-shadow: 0 0 18px rgba(var(--rgb-accent), .22); }

.card:hover, [class*="card"]:hover { transform: translateY(-3px); box-shadow: 0 2px 0 rgba(2,17,31,.10), 0 16px 34px rgba(2,17,31,.16); border-color: rgba(var(--rgb-accent), .22); }

.card { border: 1px solid rgba(var(--rgb-primary), .12); }

.card:hover, [class*="card"]:hover { background: linear-gradient(180deg, rgba(255,255,255,.92), rgba(255,255,255,.78)); }

a:not([class]):hover { color: var(--color-accent); }

.card { filter: saturate(1.02) contrast(1.02); }

section, .section { position: relative; }

.testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }

/* ========== 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); background: linear-gradient(180deg, rgba(255,255,255,.90), rgba(255,255,255,.70)); border-color: rgba(var(--rgb-primary), .12); box-shadow: 0 1px 0 rgba(2,17,31,.05), 0 8px 18px rgba(2,17,31,.09); }

/* 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; }
                .feature-list .card { border-radius: 12px; box-shadow: 0 1px 0 rgba(2,17,31,.06), 0 9px 22px rgba(2,17,31,.08); border-color: rgba(56,189,248,.22); background: linear-gradient(180deg, rgba(224,247,255,.62), rgba(255,255,255,.75)); }

/* 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: -1px; background: radial-gradient(1200px 520px at 20% 10%, rgba(var(--rgb-accent), .22), transparent 55%), radial-gradient(900px 450px at 85% 20%, rgba(59,130,246,.18), transparent 60%), linear-gradient(180deg, rgba(2,17,31,.06), rgba(2,17,31,0)); opacity: .95; border-radius: var(--radius-xl); filter: saturate(1.05); z-index: 0; pointer-events: none; }

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
                .testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }
                .testimonial-list .card { background: linear-gradient(180deg, rgba(255,255,255,.88), rgba(255,255,255,.68)); border-color: rgba(52,211,153,.22); box-shadow: 0 1px 0 rgba(2,17,31,.05), 0 7px 16px rgba(2,17,31,.08); }
                .testimonial-list .card:hover { border-color: rgba(52,211,153,.40); }

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }
                .partner-grid .card { border-radius: 10px; border-color: rgba(250,204,21,.22); background: linear-gradient(180deg, rgba(255,245,214,.70), rgba(255,255,255,.72)); box-shadow: 0 1px 0 rgba(2,17,31,.05), 0 9px 18px rgba(2,17,31,.07); }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }
                .faq-wrapper .card { border-color: rgba(var(--rgb-primary), .14); background: linear-gradient(180deg, rgba(245,247,255,.80), rgba(255,255,255,.72)); box-shadow: 0 1px 0 rgba(2,17,31,.06), 0 10px 22px rgba(2,17,31,.09); }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }
                .stats-grid .card { border-color: rgba(var(--rgb-accent), .18); background: linear-gradient(180deg, rgba(255,219,231,.60), rgba(255,255,255,.70)); box-shadow: 0 1px 0 rgba(2,17,31,.05), 0 12px 26px rgba(2,17,31,.09); }

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }
.cta-inner .card { border-radius: 12px; border-color: rgba(99,102,241,.22); background: linear-gradient(180deg, rgba(239,238,255,.78), rgba(255,255,255,.70)); box-shadow: 0 1px 0 rgba(2,17,31,.05), 0 10px 24px rgba(2,17,31,.08); }
.cta-inner .card:hover { border-color: rgba(99,102,241,.40); }

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

/* 条件性装饰 */
a:not([class]):hover { color: var(--color-accent); }
.card { border: 1px solid rgba(var(--rgb-primary), .12); }

/* 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; --radius-lg: 13px; --transition: 150ms cubic-bezier(.2,.9,.2,1); }
    .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; }
}