/* CSSVariantEngine v3.0 — go-douyu.org.cn */
/* Palette: bright blue | Radius: medium 8-16px | Shadow: glow-accent */
/* Spacing: airy | Transition: smooth cubic */
/* Section layouts: {"news":"list-view","features":"grid-3","hero":"overlay","testimonials":"stacked","partners":"centered","faq":"with-sidebar","stats":"inline","cta":"full-bg"} */

:root {
    --color-primary: #165DFF;
    --color-primary-dark: #0E42D2;
    --color-accent: #4096ff;
    --color-surface: #F5F7FA;
    --color-text: #1D2129;
    --rgb-primary: 22, 93, 255;
    --rgb-accent: 64, 150, 255;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --shadow-sm: 0 2px 10px rgba(var(--rgb-primary), 0.07), 0 0 10px rgba(var(--rgb-accent), 0.12);
    --shadow-md: 0 4px 18px rgba(var(--rgb-primary), 0.1), 0 0 24px rgba(var(--rgb-accent), 0.35);
    --shadow-lg: 0 8px 30px rgba(var(--rgb-primary), 0.12), 0 0 32px rgba(var(--rgb-accent), 0.4);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1.125rem;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 800;
    --body-line-height: 1.75;
}

@keyframes pulseGlow {
    0% { box-shadow: 0 4px 18px rgba(var(--rgb-primary), 0.1), 0 0 24px rgba(var(--rgb-accent), 0.35); }
    50% { box-shadow: 0 4px 18px rgba(var(--rgb-primary), 0.1), 0 0 36px rgba(var(--rgb-accent), 0.5); }
    100% { box-shadow: 0 4px 18px rgba(var(--rgb-primary), 0.1), 0 0 24px rgba(var(--rgb-accent), 0.35); }
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background-color: var(--color-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"] { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); background-color: #ffffff; }
.card:hover { transform: translateY(-3px); box-shadow: 0 6px 24px rgba(var(--rgb-primary), 0.15), 0 0 32px rgba(var(--rgb-accent), 0.6); animation: pulseGlow 2.5s ease-in-out infinite; }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background-color: var(--color-primary); color: #ffffff; }
.btn:hover { background-color: var(--color-primary-dark); box-shadow: 0 0 20px rgba(var(--rgb-accent), 0.5); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }
a:not([class]):hover { color: var(--color-primary-dark); text-shadow: 0 0 8px rgba(var(--rgb-accent), 0.3); }

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

/* news: list-view */
/* 列表模式 (图左文右) */
                .news-grid { display: flex; flex-direction: column; gap: var(--space-gap); }
                .news-grid .card { display: grid; grid-template-columns: 280px 1fr; }

/* 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; }
                .hero::before { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(var(--rgb-primary), 0.05) 0%, rgba(var(--rgb-accent), 0.08) 100%); }
                .hero-content { position: relative; z-index: 1; }

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

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
.partner-grid > * { filter: grayscale(40%); transition: var(--transition); }
.partner-grid > *:hover { filter: grayscale(0%); filter: drop-shadow(0 0 12px rgba(var(--rgb-accent), 0.5)); }

/* 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: full-bg */
.cta-section { background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%); color: #fff; padding: 4rem 2rem; box-shadow: 0 0 60px rgba(var(--rgb-accent), 0.25); }

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

/* 条件性装饰 */
.card { border-left: 4px solid 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; }
}