:root {
    --color-primary: #5b3df5;
    --color-primary-dark: #3b1fa8;
    --color-accent: #ff6b8a;
    --color-surface: #f6f5fb;
    --color-text: #1f1b2e;
    --rgb-primary: 91,61,245;
    --rgb-accent: 255,107,138;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 26px;
    --shadow-sm: 0 1px 2px rgba(31,27,46,0.06), 0 2px 6px -2px rgba(91,61,245,0.12);
    --shadow-md: inset 0 0 0 1px rgba(91,61,245,0.08), 0 1px 2px rgba(31,27,46,0.05), 0 8px 18px -8px rgba(91,61,245,0.22), 0 20px 38px -24px rgba(31,27,46,0.24);
    --shadow-lg: inset 0 0 0 1px rgba(255,107,138,0.20), 0 2px 4px rgba(31,27,46,0.06), 0 16px 30px -10px rgba(91,61,245,0.30), 0 34px 58px -28px rgba(31,27,46,0.30);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 0.45s cubic-bezier(0.22, 0.68, 0.34, 1);
    --heading-weight: 800;
    --body-line-height: 1.65;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background-color: #f4f3fa; background-image: linear-gradient(180deg, #f9f8fe 0%, #f1f4fb 42%, #fdf5f8 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 1px 0 rgba(255,255,255,0.85), 0 2px 10px rgba(91,61,245,0.10); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); background-image: radial-gradient(circle at 12% 0%, rgba(91,61,245,0.07) 0%, rgba(91,61,245,0) 55%), radial-gradient(circle at 88% 100%, rgba(255,107,138,0.08) 0%, rgba(255,107,138,0) 60%); }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); background-color: #ffffff; background-image: linear-gradient(155deg, #ffffff 0%, #fbf9ff 52%, #f5f2ff 78%, #fff5f7 100%); caret-color: var(--color-primary); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); color: #ffffff; background-color: var(--color-primary); background-image: linear-gradient(135deg, #6a4bff 0%, #8b5cf6 48%, #ff6b8a 100%); box-shadow: 0 1px 2px rgba(59,31,168,0.18), 0 10px 22px -12px rgba(91,61,245,0.55); accent-color: var(--color-primary); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }
a:not([class]):hover { color: var(--color-accent); }

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

/* news: grid-3 */
/* 三列等宽网格 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 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; background-image: linear-gradient(120deg, rgba(91,61,245,0.05) 0%, rgba(255,107,138,0.05) 100%); border-radius: var(--radius-xl); }

/* 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; filter: saturate(1.05); }

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }

/* 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; color: var(--color-primary-dark); text-shadow: 0 1px 0 rgba(255,255,255,0.9), 0 8px 20px rgba(91,61,245,0.22); }

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; background-image: linear-gradient(100deg, rgba(91,61,245,0.10) 0%, rgba(139,92,246,0.07) 45%, rgba(255,107,138,0.10) 100%); border-radius: var(--radius-xl); }

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

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
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; --radius-lg: 16px; --shadow-md: inset 0 0 0 1px rgba(91,61,245,0.08), 0 1px 2px rgba(31,27,46,0.05), 0 6px 14px -8px rgba(91,61,245,0.20); }
    .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; }
}