/* Palette: indigo–violet + amber | Radius: rounded | Shadow: layered colored */
/* Spacing: comfortable | Transition: smooth (0.45s) */

:root {
    --color-primary: #4f46e5;
    --color-primary-dark: #3730a3;
    --color-accent: #f59e0b;
    --color-surface: #f4f5fb;
    --color-text: #1b1830;
    --rgb-primary: 79,70,229;
    --rgb-accent: 245,158,11;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 1px 2px rgba(27,24,48,.06), 0 3px 12px -2px rgba(var(--rgb-primary),.14);
    --shadow-md: 0 2px 5px rgba(27,24,48,.05), 0 12px 26px -10px rgba(var(--rgb-primary),.22), 0 22px 44px -26px rgba(236,72,153,.26);
    --shadow-lg: 0 4px 10px rgba(27,24,48,.06), 0 20px 44px -14px rgba(var(--rgb-primary),.30), 0 34px 64px -32px rgba(var(--rgb-accent),.32);
    --grad-card: linear-gradient(145deg, #ffffff 0%, #f5f4ff 36%, #eef2ff 68%, #fff7e8 100%);
    --grad-accent: linear-gradient(135deg, #6366f1 0%, #8b5cf6 38%, #ec4899 72%, #f59e0b 100%);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.45s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background:
        radial-gradient(circle at 12% 8%, rgba(var(--rgb-primary),.10) 0%, rgba(var(--rgb-primary),0) 42%),
        radial-gradient(circle at 88% 92%, rgba(var(--rgb-accent),.12) 0%, rgba(var(--rgb-accent),0) 46%),
        linear-gradient(180deg, #f7f6fc 0%, #f2f3fa 50%, #f7f5f1 100%);
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: #241f42; }
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), inset 0 0 0 1px rgba(var(--rgb-primary),.10);
    padding: var(--space-card);
    transition: var(--transition);
    background: var(--grad-card);
    background-color: #ffffff;
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    background-image: var(--grad-accent);
    color: #ffffff;
    box-shadow: 0 6px 18px -6px rgba(var(--rgb-primary),.55), inset 0 1px 0 rgba(255,255,255,.35);
    border-color: rgba(139,92,246,.45);
    border-style: solid;
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

/* ========== 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); }

/* features: grid-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }

/* hero: left-aligned */
.hero-content { text-align: left; max-width: 600px; }

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

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: full-bg */
.cta-section {
    background: linear-gradient(125deg, #4338ca 0%, #6d28d9 34%, #be185d 68%, #f59e0b 100%);
    color: #ffffff;
    padding: 4rem 2rem;
    box-shadow: 0 24px 56px -28px rgba(var(--rgb-primary),.55), inset 0 0 0 1px rgba(255,255,255,.14);
    border-color: rgba(255,255,255,.22);
    border-style: solid;
}

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

/* 条件性装饰 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg), inset 0 0 0 1px rgba(236,72,153,.22);
    background-image: linear-gradient(145deg, #ffffff 0%, #f3f1ff 32%, #ede9fe 62%, #fff4dc 100%);
}
a:not([class]):hover { color: var(--color-accent); }

/* 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; }
}