:root {
    --color-primary: #1f6feb;
    --color-primary-dark: #1158c7;
    --color-accent: #ff3d81;
    --color-surface: #f1fbff;
    --color-text: #1b2330;
    --rgb-primary: 31,111,235;
    --rgb-accent: 255,61,129;
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 5px;
    --radius-xl: 7px;

    --shadow-sm: 0 1px 0 rgba(10, 20, 35, .06), 0 0 0 1px rgba(10, 20, 35, .03);
    --shadow-md: 0 2px 0 rgba(10, 20, 35, .05), 0 10px 28px rgba(10, 20, 35, .07), 0 1px 2px rgba(10, 20, 35, .05);
    --shadow-lg: 0 3px 0 rgba(10, 20, 35, .06), 0 18px 40px rgba(10, 20, 35, .10), 0 2px 6px rgba(10, 20, 35, .06);

    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 160ms cubic-bezier(.2,.85,.2,1);
    --heading-weight: 800;
    --body-line-height: 1.6;
}

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:
        0 1px 0 rgba(255,255,255,.55) inset,
        0 -1px 0 rgba(10,20,35,.06) inset,
        0 1px 2px rgba(10,20,35,.08),
        0 10px 24px rgba(10,20,35,.10);
    padding: var(--space-card);
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        border-color var(--transition),
        background-color var(--transition),
        color var(--transition);
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        background-color var(--transition),
        border-color var(--transition),
        color var(--transition);
}

a:not([class]) {
    color: var(--color-primary);
    transition:
        color var(--transition),
        text-shadow var(--transition),
        filter var(--transition);
    text-shadow: none;
}

/* ========== 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;
                    background:
                        linear-gradient(135deg, rgba(31,111,235,.09), rgba(255,61,129,.08)) padding-box;
                    border: 1px solid rgba(10,20,35,.10);
                }

/* features: horizontal */
/* 水平滚动 */
                .feature-list { display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; }
                .feature-list > * {
                    flex: 0 0 300px;
                    scroll-snap-align: start;
                }
                .feature-list > * > .card,
                .feature-list > .card {
                    box-shadow:
                        0 1px 0 rgba(255,255,255,.6) inset,
                        0 1px 2px rgba(10,20,35,.08),
                        0 12px 26px rgba(10,20,35,.08);
                    border-radius: var(--radius-sm);
                    border: 1px solid rgba(10,20,35,.10);
                    background:
                        linear-gradient(180deg, rgba(255,255,255,.75), rgba(255,255,255,.35)) padding-box;
                }

/* hero: centered */
.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}
.hero-content .card,
.hero-content [class*="card"] {
    border-radius: var(--radius-xl);
    box-shadow:
        0 1px 0 rgba(255,255,255,.65) inset,
        0 2px 0 rgba(10,20,35,.06),
        0 18px 50px rgba(31,111,235,.10),
        0 10px 26px rgba(255,61,129,.08);
    border: 1px solid rgba(31,111,235,.18);
    background:
        radial-gradient(900px 220px at 50% 0%, rgba(31,111,235,.18), rgba(31,111,235,0) 55%),
        radial-gradient(700px 240px at 60% 20%, rgba(255,61,129,.14), rgba(255,61,129,0) 60%),
        linear-gradient(180deg, rgba(255,255,255,.82), rgba(255,255,255,.42)) padding-box;
}

/* testimonials: carousel */
/* 单条轮播 */
                .testimonial-list { display: flex; overflow: hidden; } 
                .testimonial-list > * { flex: 0 0 100%; }
                .testimonial-list > * > .card,
                .testimonial-list > .card {
                    border-radius: 3px;
                    border: 1px solid rgba(10,20,35,.10);
                    box-shadow:
                        0 1px 0 rgba(255,255,255,.55) inset,
                        0 2px 10px rgba(10,20,35,.10),
                        0 0 0 1px rgba(31,111,235,.14) inset;
                    background:
                        conic-gradient(from 220deg at 30% 20%, rgba(31,111,235,.18), rgba(255,61,129,.14), rgba(31,111,235,.06), rgba(31,111,235,.18)) padding-box;
                }

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }
.partner-grid .card,
.partner-grid [class*="card"] {
    border-radius: 3px;
    border: 1px solid rgba(10,20,35,.10);
    box-shadow:
        0 1px 0 rgba(255,255,255,.55) inset,
        0 1px 3px rgba(10,20,35,.08);
    background:
        linear-gradient(180deg, rgba(31,111,235,.10), rgba(255,255,255,.55)) padding-box;
}

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }
                .faq-wrapper > .card,
                .faq-wrapper [class*="card"] {
                    border: 1px solid rgba(10,20,35,.10);
                    box-shadow:
                        0 1px 0 rgba(255,255,255,.58) inset,
                        0 14px 32px rgba(10,20,35,.08);
                    border-radius: 4px;
                    background:
                        linear-gradient(135deg, rgba(255,61,129,.12), rgba(31,111,235,.10)) padding-box;
                }
                .faq-wrapper > :nth-child(2) .card,
                .faq-wrapper > :nth-child(2) [class*="card"] {
                    background:
                        radial-gradient(240px 160px at 20% 10%, rgba(255,61,129,.18), rgba(255,61,129,0) 60%),
                        linear-gradient(180deg, rgba(255,255,255,.78), rgba(255,255,255,.40)) padding-box;
                    border-color: rgba(255,61,129,.22);
                    box-shadow:
                        0 1px 0 rgba(255,255,255,.65) inset,
                        0 2px 0 rgba(10,20,35,.06),
                        0 18px 44px rgba(255,61,129,.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; }
                .stats-grid .card,
                .stats-grid [class*="card"] {
                    border-radius: 6px;
                    border: 1px solid rgba(10,20,35,.10);
                    box-shadow:
                        0 1px 0 rgba(255,255,255,.6) inset,
                        0 10px 24px rgba(10,20,35,.09);
                    background:
                        linear-gradient(135deg, rgba(31,111,235,.12), rgba(255,61,129,.10)) padding-box;
                }

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }
.cta-inner .card,
.cta-inner [class*="card"] {
    border-radius: 6px;
    border: 1px solid rgba(31,111,235,.22);
    background:
        radial-gradient(500px 200px at 20% 20%, rgba(31,111,235,.20), rgba(31,111,235,0) 55%),
        radial-gradient(400px 180px at 75% 35%, rgba(255,61,129,.16), rgba(255,61,129,0) 58%),
        linear-gradient(180deg, rgba(255,255,255,.84), rgba(255,255,255,.44)) padding-box;
    box-shadow:
        0 1px 0 rgba(255,255,255,.65) inset,
        0 2px 0 rgba(10,20,35,.06),
        0 24px 60px rgba(31,111,235,.12),
        0 12px 28px rgba(255,61,129,.09);
    transform: translateZ(0);
}

/* Page Layout: wide */
/* 超宽 */
            .page-main { max-width: 1400px; margin: 0 auto; }

/* 条件性装饰 */
a:not([class]):hover {
    color: var(--color-accent);
    text-shadow: 0 0 16px rgba(255,61,129,.22);
    filter: saturate(1.08);
}

.card { border-left: 3px solid var(--color-primary); }
header, .header, .navbar { background: transparent; }

/* 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; }
}