:root {
    --color-primary: #4b0082;
    --color-primary-dark: #2e0055;
    --color-accent: #d4af37;
    --color-surface: #f9f6f2;
    --color-text: #2a1a3d;
    --rgb-primary: 75,0,130;
    --rgb-accent: 212,175,55;
    --radius-sm: 4px;
    --radius-md: 5px;
    --radius-lg: 6px;
    --radius-xl: 8px;
    --shadow-sm: 0 1px 3px rgba(75,0,130,0.15), 0 1px 0 rgba(212,175,55,0.1);
    --shadow-md: 0 4px 6px rgba(46,0,85,0.2), 0 1px 3px rgba(212,175,55,0.15);
    --shadow-lg: 0 10px 20px rgba(46,0,85,0.3), 0 4px 10px rgba(212,175,55,0.2);
    --space-section: 2.5rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 600;
    --body-line-height: 1.7;
}

body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background-color: #0f0f1a;
    filter: drop-shadow(0 0 0.2rem rgba(212,175,55,0.3));
}
h1,
h2,
h3,
h4 {
    font-weight: var(--heading-weight);
    text-shadow: 0 1px 2px rgba(75,0,130,0.6);
}
section,
.section {
    padding-top: var(--space-section);
    padding-bottom: var(--space-section);
}
.card,
[class*="card"] {
    border-radius: var(--radius-sm);
    box-shadow:
        0 1px 2px rgba(75,0,130,0.25),
        inset 0 0 8px rgba(212,175,55,0.3);
    padding: var(--space-card);
    transition: var(--transition);
    background: linear-gradient(135deg, #f9f6f2 0%, #e9e4d9 100%);
    border: solid 1px rgba(212,175,55,0.4);
}
.btn,
button[class*="btn"],
a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    background-image: linear-gradient(90deg, #4b0082 0%, #2e0055 100%);
    color: #f9f6f2;
    border-style: solid;
    border-color: #d4af37;
    box-shadow:
        0 0 8px rgba(212,175,55,0.6),
        0 2px 6px rgba(75,0,130,0.5);
}
a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-decoration: none;
    outline: 2px dashed rgba(212,175,55,0.7);
    outline-offset: 2px;
    caret-color: var(--color-accent);
    accent-color: var(--color-accent);
}

/* ========== 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: 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: minimal */
.hero {
    padding: 2rem 0;
}
.hero-content {
    max-width: 560px;
}

/* testimonials: stacked */
/* 垂直堆叠 */
.testimonial-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-gap);
    max-width: 720px;
    margin: 0 auto;
}

/* partners: scroll */
/* 自动滚动 */
.partner-grid {
    display: flex;
    gap: 2rem;
    overflow: hidden;
    animation: partnerScroll 20s 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: 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: linear-gradient(135deg, #4b0082 0%, #2e0055 100%);
    color: #f9f6f2;
    padding: 4rem 2rem;
    box-shadow:
        inset 0 0 40px rgba(212,175,55,0.3);
}

/* 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(-2px);
    box-shadow:
        0 6px 10px rgba(75,0,130,0.5),
        0 2px 6px rgba(212,175,55,0.4),
        inset 0 0 14px rgba(212,175,55,0.5);
    border-color: #d4af37;
}
a:not([class]):hover {
    color: var(--color-accent);
    text-shadow: 0 0 4px #d4af37;
}
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: 1.75rem;
        --space-card: 0.85rem;
        --space-gap: 0.6rem;
    }
    .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;
    }
}