:root {
    --color-primary: #0f2a3d;
    --color-primary-dark: #081521;
    --color-accent: #ff4d6d;
    --color-surface: #f6f7fb;
    --color-text: #0b1220;
    --rgb-primary: 15,42,61;
    --rgb-accent: 255,77,109;
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 10px;
    --radius-xl: 14px;
    --shadow-sm: 0 1px 0 rgba(10,18,32,0.06), 0 10px 22px rgba(8,21,33,0.05);
    --shadow-md: 0 1px 0 rgba(10,18,32,0.05), 0 8px 18px rgba(8,21,33,0.06);
    --shadow-lg: 0 1px 0 rgba(10,18,32,0.06), 0 14px 30px rgba(8,21,33,0.08);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 180ms cubic-bezier(0.2, 0.95, 0.2, 1);
    --heading-weight: 600;
    --body-line-height: 1.6;
}

body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(180deg, rgba(246,247,251,1) 0%, rgba(243,245,252,1) 45%, rgba(246,247,251,1) 100%); }
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(10,18,32,0.06),
        0 10px 22px rgba(8,21,33,0.06),
        0 2px 6px rgba(255,77,109,0.08);
    padding: var(--space-card);
    transition:
        box-shadow 220ms cubic-bezier(0.2, 0.95, 0.2, 1),
        transform 220ms cubic-bezier(0.2, 0.95, 0.2, 1),
        border-color var(--transition),
        background-color var(--transition),
        color var(--transition);
    background: #ffffff;
    position: relative;
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition:
        background-color var(--transition),
        box-shadow var(--transition),
        transform var(--transition),
        color var(--transition),
        border-color var(--transition);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-shadow: 0 1px 0 rgba(255,255,255,0.4); }

/* ========== 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;
                    border-radius: var(--radius-md);
                    border-left-color: var(--color-accent);
                    box-shadow:
                        0 1px 0 rgba(10,18,32,0.05),
                        0 8px 16px rgba(8,21,33,0.05),
                        0 0 0 1px rgba(15,42,61,0.06);
                }

/* 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; }

/* hero: split */
/* 左文右图 */
                .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }

/* testimonials: stacked */
/* 垂直堆叠 */
                .testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; }

/* 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%); } }

/* 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; text-shadow: 0 1px 0 rgba(255,255,255,0.65); color: #0b1626; letter-spacing: -0.02em; }

/* 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 { border-left: 3px solid var(--color-primary); }
.card {
    background:
        linear-gradient(180deg, rgba(255,255,255,1) 0%, rgba(255,255,255,0.98) 100%);
    box-shadow:
        0 1px 0 rgba(10,18,32,0.05),
        0 10px 24px rgba(8,21,33,0.06),
        0 0 0 1px rgba(15,42,61,0.05);
}

/* 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; }
}