:root {
    --color-primary: #2a6df6;
    --color-primary-dark: #153a8a;
    --color-accent: #ff3d8d;
    --color-surface: #f7f2ea;
    --color-text: #121826;
    --rgb-primary: 42,109,246;
    --rgb-accent: 255,61,141;
    --radius-sm: 2px;
    --radius-md: 3px;
    --radius-lg: 4px;
    --radius-xl: 4px;
    --shadow-sm: none;
    --shadow-md: none;
    --shadow-lg: none;
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.15s cubic-bezier(0.2, 0.9, 0.2, 1);
    --heading-weight: 650;
    --body-line-height: 1.6;
    --shadow-card: 4px 4px 0px rgba(18, 24, 38, 0.22), 8px 10px 22px rgba(18, 24, 38, 0.12);
    --shadow-strong: 4px 4px 0px rgba(18, 24, 38, 0.28), 10px 14px 26px rgba(18, 24, 38, 0.16);
    --shadow-inset: inset 0 0 0 2px rgba(255,255,255,0.75);
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: radial-gradient(1200px 700px at 20% -10%, rgba(42,109,246,0.12), transparent 60%), radial-gradient(900px 600px at 90% 10%, rgba(255,61,141,0.10), transparent 55%), linear-gradient(180deg, #fcfbf8 0%, #f4f6fb 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-xl);
    box-shadow:
        4px 4px 0px rgba(18, 24, 38, 0.22),
        8px 10px 22px rgba(18, 24, 38, 0.12),
        var(--shadow-inset);
    border: 3px solid rgba(18, 24, 38, 0.14);
    background: linear-gradient(180deg, rgba(255,255,255,0.95) 0%, rgba(255,255,255,0.82) 100%);
    transition: var(--transition);
}
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); border: 2px solid rgba(18, 24, 38, 0.18); background: linear-gradient(180deg, rgba(255,255,255,0.95) 0%, rgba(255,255,255,0.85) 100%); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-color: rgba(42,109,246,0.35); text-shadow: 0px 1px 0px rgba(255,255,255,0.55); }

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

/* news: featured-left */
/* 左大右小 (1大+2小) */
                .news-grid { display: grid; grid-template-columns: 2fr 1fr; grid-template-rows: auto auto; gap: var(--space-gap); }
                .news-grid > *:first-child { grid-row: span 2; }

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

/* testimonials: grid-3 */
.testimonial-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: full-bg */
.cta-section {
    background:
        conic-gradient(from 180deg at 50% 50%, rgba(255,61,141,0.95) 0deg, rgba(42,109,246,0.95) 120deg, rgba(42,109,246,0.55) 220deg, rgba(255,61,141,0.95) 360deg);
    color: #ffffff;
    padding: 4rem 2rem;
    box-shadow: 0px 10px 34px rgba(18, 24, 38, 0.18);
    border-top: 3px solid rgba(255,255,255,0.35);
    border-bottom: 3px solid rgba(255,255,255,0.35);
}

/* 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: 0px 2px 0px rgba(18, 24, 38, 0.15); text-decoration-color: rgba(255,61,141,0.55); }

/* 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; }
}