/* sidebar-classic + glow-effects */
:root {
    --color-primary: #3d5a80;
    --color-primary-dark: #252e3a;
    --color-accent: #f4a261;
    --color-surface: #f0f4f8;
    --color-text: #1f2933;
    --color-bg: #f8fafc;
    --rgb-primary: 61,90,128;
    --rgb-accent: 244,162,97;
    --radius-sm: 8px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 16px;
    --shadow-sm: 0 1px 3px rgba(37,46,58,.06), 0 0 12px rgba(var(--rgb-accent),.14);
    --shadow-md: 0 4px 16px rgba(37,46,58,.08), 0 0 24px rgba(var(--rgb-accent),.4);
    --shadow-lg: 0 8px 24px rgba(37,46,58,.12), 0 0 32px rgba(var(--rgb-accent),.6);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.5rem;
    --transition: 0.25s ease-in-out;
    --heading-weight: 700;
    --body-line-height: 1.7;
}

body { color: var(--color-text); line-height: var(--body-line-height); background-color: var(--color-bg); accent-color: var(--color-accent); caret-color: var(--color-accent); }
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(--color-surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); animation: btn-glow 3s ease-in-out infinite; }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

@keyframes btn-glow {
    0%, 100% { box-shadow: 0 0 14px rgba(var(--rgb-accent), .3); }
    50% { box-shadow: 0 0 28px rgba(var(--rgb-accent), .55); }
}

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

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

/* features: centered */
                .feature-list { display: flex; flex-direction: column; align-items: center; gap: calc(var(--space-gap) * 2); max-width: 720px; margin: 0 auto; }

/* hero: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; }

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

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }

/* stats: big-number */
                .stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
                .stats-grid .stat-value { font-size: 3rem; }

/* cta: card-style */
.cta-inner { background: linear-gradient(135deg, var(--color-surface), #e2e8f0); border-radius: var(--radius-xl); padding: 3rem; text-align: center; box-shadow: var(--shadow-lg); }

/* Page Layout: wide */
                .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); text-shadow: 0 0 16px rgba(var(--rgb-accent), .35); }
.card { border-left: 3px 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; }
}