:root {
    --color-primary: #2a3d2f;
    --color-primary-dark: #1d2d22;
    --color-accent: #7c3aed;
    --color-surface: #f4f8ff;
    --color-text: #0f172a;
    --rgb-primary: 42,61,47;
    --rgb-accent: 124,58,237;
    --radius-sm: 3px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --shadow-sm: 0 1px 0 rgba(15, 23, 42, .08), 0 8px 20px rgba(var(--rgb-accent),.10);
    --shadow-md: 0 10px 28px rgba(2, 6, 23, .10), 0 0 0 1px rgba(124,58,237,.12), 0 0 28px rgba(var(--rgb-accent),.10);
    --shadow-lg: 0 18px 48px rgba(2, 6, 23, .14), 0 0 0 1px rgba(124,58,237,.14), 0 0 44px rgba(var(--rgb-accent),.14);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 240ms cubic-bezier(.2,.8,.2,1);
    --heading-weight: 800;
    --body-line-height: 1.65;
    --shadow-glow: 0 0 24px rgba(var(--rgb-accent), .40);
    --shadow-halo: 0 0 32px rgba(var(--rgb-accent), .60);
    --ring: rgba(124,58,237,.35);
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: radial-gradient(1200px 700px at 15% 5%, rgba(var(--rgb-accent),.10), transparent 55%), radial-gradient(900px 500px at 85% 0%, rgba(124,58,237,.08), transparent 50%), var(--color-surface); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 1px 0 rgba(15,23,42,.08); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] {
    border-radius: var(--radius-lg);
    background: linear-gradient(180deg, rgba(255,255,255,.82), rgba(255,255,255,.66));
    box-shadow:
        0 1px 0 rgba(15,23,42,.10),
        0 18px 40px rgba(2, 6, 23, .10),
        var(--shadow-glow);
    padding: var(--space-card);
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        border-color var(--transition),
        background var(--transition),
        filter var(--transition);
    border: 1px solid rgba(124,58,237,.14);
}
.card:hover, [class*="card"]:hover {
    box-shadow:
        0 2px 0 rgba(15,23,42,.12),
        0 22px 56px rgba(2, 6, 23, .14),
        var(--shadow-halo);
    filter: saturate(1.05);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow: 0 10px 26px rgba(var(--rgb-accent), .18), 0 0 0 1px rgba(124,58,237,.22);
}
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover {
    box-shadow: 0 14px 34px rgba(var(--rgb-accent), .25), var(--shadow-halo);
}
a:not([class]) {
    color: #1f2a44;
    transition: var(--transition);
    text-shadow: 0 0 0 rgba(0,0,0,0);
    outline-color: var(--ring);
}
a:not([class]):hover { color: var(--color-accent); }

@keyframes sidebarGlowPulse {
    0% { box-shadow: 0 10px 26px rgba(var(--rgb-accent), .18), 0 0 0 1px rgba(124,58,237,.22); }
    50% { box-shadow: 0 14px 38px rgba(var(--rgb-accent), .26), 0 0 32px rgba(var(--rgb-accent), .40); }
    100% { box-shadow: 0 10px 26px rgba(var(--rgb-accent), .18), 0 0 0 1px rgba(124,58,237,.22); }
}

/* ========== 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); animation: sidebarGlowPulse 3.2s ease-in-out infinite; }

/* features: grid-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }
.feature-list .card { box-shadow: 0 1px 0 rgba(15,23,42,.10), 0 14px 30px rgba(2, 6, 23, .10), 0 0 22px rgba(var(--rgb-accent),.12); border-color: rgba(124,58,237,.12); }

/* hero: overlay */
/* 全屏背景+文字覆盖 */
                .hero { position: relative; min-height: 70vh; display: flex; align-items: center; }
                .hero-content { position: relative; z-index: 1; }
.hero, [class*="hero"], section:first-of-type {
    background:
        radial-gradient(1200px 650px at 12% 20%, rgba(var(--rgb-accent),.26), transparent 52%),
        radial-gradient(900px 520px at 80% 10%, rgba(124,58,237,.18), transparent 55%),
        linear-gradient(135deg, #252e3a, #132033);
}
.hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(800px 400px at 50% 0%, rgba(var(--rgb-accent), .18), transparent 60%);
    opacity: .9;
    pointer-events: none;
}

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
                .testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }
.testimonial-list .card { background: linear-gradient(180deg, rgba(255,255,255,.82), rgba(245,250,255,.62)); border-color: rgba(124,58,237,.10); box-shadow: 0 14px 34px rgba(2, 6, 23, .10), var(--shadow-glow); }

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
.partner-grid .card, .partner-grid [class*="card"] {
    box-shadow: 0 12px 28px rgba(2,6,23,.10), 0 0 24px rgba(var(--rgb-accent), .12);
    border-color: rgba(124,58,237,.10);
}

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }
.faq-wrapper .card { box-shadow: 0 1px 0 rgba(15,23,42,.10), 0 16px 40px rgba(2, 6, 23, .11), var(--shadow-glow); border-color: rgba(124,58,237,.14); }

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }
.stats-grid .card, .stats-grid [class*="card"] {
    border-radius: var(--radius-md);
    box-shadow: 0 10px 26px rgba(2,6,23,.10), 0 0 0 1px rgba(124,58,237,.14), 0 0 22px rgba(var(--rgb-accent), .10);
    border-color: rgba(124,58,237,.12);
}

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }
.cta-inner .card, .cta-inner [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow: 0 16px 44px rgba(2,6,23,.12), var(--shadow-halo);
    border-color: rgba(124,58,237,.18);
    background: linear-gradient(180deg, rgba(255,255,255,.78), rgba(245,250,255,.62));
}

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

/* 条件性装饰 */
a:not([class]):hover { color: var(--color-accent); }
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(135deg, #252e3a, #132033); }

/* 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; }
    .news-grid .card { animation-duration: 3.8s; }
}
@media (max-width: 640px) {
    :root { --space-section: 2rem; --space-card: 1rem; --space-gap: 0.75rem; --transition: 200ms cubic-bezier(.2,.75,.2,1); }
    .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; }
    .card, [class*="card"] { box-shadow: 0 10px 28px rgba(2, 6, 23, .10), 0 0 22px rgba(var(--rgb-accent), .12); }
    .news-grid .card { animation: none; }
}