:root {
    --color-primary: #5b21b6;
    --color-primary-dark: #2e1065;
    --color-accent: #f59e0b;
    --color-surface: #f5f3ff;
    --color-text: #1e1b4b;
    --rgb-primary: 91,33,182;
    --rgb-accent: 245,158,11;
    --radius-sm: 4px;
    --radius-md: 10px;
    --radius-lg: 18px;
    --radius-xl: 30px;
    --shadow-sm: 0 2px 4px -2px rgba(91,33,182,0.12), 0 4px 8px -4px rgba(91,33,182,0.1);
    --shadow-md: 0 6px 16px -6px rgba(91,33,182,0.2), 0 12px 32px -8px rgba(91,33,182,0.16), 0 0 0 1px rgba(245,158,11,0.1) inset;
    --shadow-lg: 0 12px 28px -8px rgba(91,33,182,0.28), 0 24px 56px -12px rgba(245,158,11,0.18), 0 0 0 1px rgba(245,158,11,0.18) inset;
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background: radial-gradient(ellipse at 50% 0%, rgba(245,158,11,0.08), transparent 40%), linear-gradient(180deg, #ffffff 0%, var(--color-surface) 45%, #e9d5ff 100%);
    caret-color: var(--color-accent);
    accent-color: var(--color-accent);
}
h1, h2, h3, h4 {
    font-weight: var(--heading-weight);
    color: var(--color-primary-dark);
    text-shadow: 0 1px 0 rgba(255,255,255,0.4);
}
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);
    padding: var(--space-card);
    transition: var(--transition);
    background: linear-gradient(145deg, #ffffff 0%, var(--color-surface) 45%, #ddd6fe 100%);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #ffffff;
    box-shadow: var(--shadow-sm);
}
a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
}

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

/* hero: overlay */
/* 全屏背景+文字覆盖 */
.hero {
    position: relative;
    min-height: 70vh;
    display: flex;
    align-items: center;
    background: radial-gradient(ellipse at 15% 20%, rgba(245,158,11,0.16), transparent 55%), radial-gradient(ellipse at 85% 80%, rgba(91,33,182,0.22), transparent 55%), linear-gradient(135deg, #ffffff 0%, var(--color-surface) 45%, #e9d5ff 100%);
}
.hero-content { position: relative; z-index: 1; }

/* testimonials: carousel */
/* 单条轮播 */
.testimonial-list { display: flex; overflow: hidden; }
.testimonial-list > * { flex: 0 0 100%; }

/* partners: scroll */
/* 自动滚动 */
.partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 28s 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: inline */
/* 水平排列 */
.stats-grid { display: flex; justify-content: center; gap: 3rem; }

/* cta: centered */
.cta-inner {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
    background: radial-gradient(ellipse at center, rgba(245,158,11,0.1), transparent 70%);
}

/* Page Layout: narrow-centered */
/* 窄版居中 */
.page-main { max-width: 860px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    filter: brightness(1.02);
}
a:not([class]):hover {
    color: var(--color-accent);
    text-shadow: 0 0 12px rgba(245,158,11,0.45);
}
header, .header, .navbar {
    box-shadow: 0 4px 16px -6px rgba(91,33,182,0.22), 0 0 0 1px rgba(255,255,255,0.5) inset;
    background: linear-gradient(135deg, rgba(255,255,255,0.9), rgba(245,243,255,0.95));
    backdrop-filter: blur(12px);
}

/* 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; }
}