:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #4c1d95;
    --color-accent: #c026d3;
    --color-surface: #f5f3ff;
    --color-text: #1b1230;
    --rgb-primary: 124,58,237;
    --rgb-accent: 192,38,211;
    --gradient-primary: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 34%, #6d28d9 58%, #a21caf 100%);
    --gradient-card: linear-gradient(145deg, rgba(255,255,255,.96) 0%, rgba(250,247,255,.9) 55%, rgba(240,236,253,.82) 100%);
    --gradient-surface: linear-gradient(180deg, #f8f7ff 0%, #f0edfd 36%, #fbf5ff 68%, #f4effe 100%);
    --gradient-border: linear-gradient(135deg, rgba(var(--rgb-primary), .5), rgba(var(--rgb-accent), .3), rgba(var(--rgb-primary), .45));
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --radius-xl: 32px;
    --shadow-sm: 0 1px 2px rgba(46,16,101,.05), 0 2px 10px -2px rgba(var(--rgb-primary), .1);
    --shadow-md: 0 2px 5px rgba(46,16,101,.04), 0 14px 28px -10px rgba(var(--rgb-primary), .18), 0 0 24px -6px rgba(var(--rgb-accent), .08);
    --shadow-lg: 0 4px 10px rgba(46,16,101,.05), 0 26px 50px -14px rgba(var(--rgb-primary), .24), 0 0 44px -8px rgba(var(--rgb-accent), .14);
    --space-section: 4.75rem;
    --space-card: 1.85rem;
    --space-gap: 1.4rem;
    --transition: .55s cubic-bezier(.22,1,.36,1);
    --heading-weight: 800;
    --body-line-height: 1.6;
}

body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background-color: var(--color-surface);
    background-image: var(--gradient-surface);
}

h1, h2, h3, h4 {
    font-weight: var(--heading-weight);
}

section, .section {
    padding-top: var(--space-section);
    padding-bottom: var(--space-section);
}

.card, [class*="card"] {
    background: var(--gradient-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--space-card);
    transition: var(--transition);
}

.btn, button[class*="btn"], a[class*="btn"] {
    background-color: var(--color-primary-dark);
    background-image: var(--gradient-primary);
    color: #fff;
    border-radius: var(--radius-md);
    box-shadow: 0 2px 14px -4px rgba(var(--rgb-primary), .45), 0 8px 28px -8px rgba(var(--rgb-accent), .3), inset 0 1px 0 rgba(255,255,255,.18);
    transition: var(--transition);
}

a:not([class]) {
    color: var(--color-primary);
    text-decoration-color: rgba(var(--rgb-accent), .4);
    transition: var(--transition);
}

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

/* news: grid-4 */
.news-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: calc(var(--space-gap) * 0.8);
}

/* features: horizontal */
.feature-list {
    display: flex;
    gap: var(--space-gap);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
}

.feature-list > * {
    flex: 0 0 300px;
    scroll-snap-align: start;
}

/* hero: minimal */
.hero {
    padding: 2rem 0;
}

.hero-content {
    max-width: 560px;
}

/* testimonials: masonry */
.testimonial-list {
    column-count: 2;
    column-gap: var(--space-gap);
}

.testimonial-list > * {
    break-inside: avoid;
    margin-bottom: 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: single-column */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

/* stats: inline */
.stats-grid {
    display: flex;
    justify-content: center;
    gap: 2.5rem;
}

/* cta: split */
.cta-inner {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 1.75rem;
}

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

/* 条件性装饰 */
a:not([class]):hover {
    color: var(--color-accent);
    text-shadow: 0 2px 18px rgba(var(--rgb-accent), .4);
}

.card {
    border: 1px solid transparent;
    background:
        linear-gradient(145deg, rgba(255,255,255,.98) 0%, rgba(250,247,255,.9) 52%, rgba(243,239,253,.82) 100%) padding-box,
        var(--gradient-border) border-box;
    box-shadow: var(--shadow-md);
}

header, .header, .navbar {
    background-color: rgba(255,255,255,.35);
    background-image: linear-gradient(135deg, rgba(255,255,255,.8), rgba(245,243,255,.6));
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    backdrop-filter: blur(16px) saturate(180%);
    box-shadow: 0 1px 0 rgba(255,255,255,.55) inset, 0 10px 30px -16px rgba(var(--rgb-primary), .22), 0 0 30px -14px rgba(var(--rgb-accent), .15);
}

/* 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: .85rem;
        --space-gap: .65rem;
    }
    .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;
    }
}