:root {
    --color-primary: #6d28d9;
    --color-primary-dark: #4c1d95;
    --color-accent: #fbbf24;
    --color-surface: #0f0f1a;
    --color-text: #eae7ff;
    --rgb-primary: 109,40,217;
    --rgb-accent: 251,191,36;
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --shadow-sm: 0 1px 0 rgba(255,255,255,.06), 0 6px 18px rgba(109,40,217,.14);
    --shadow-md: 0 10px 30px rgba(0,0,0,.38), 0 0 0 1px rgba(251,191,36,.14), 0 0 26px rgba(109,40,217,.18);
    --shadow-lg: 0 28px 70px rgba(0,0,0,.55), 0 0 0 1px rgba(251,191,36,.18), 0 0 34px rgba(109,40,217,.28), 0 0 24px rgba(251,191,36,.12);
    --space-section: 4.75rem;
    --space-card: 1.65rem;
    --space-gap: 1.35rem;
    --transition: 520ms cubic-bezier(0.16, 1, 0.3, 1);
    --heading-weight: 800;
    --body-line-height: 1.65;

    --glow-accent: rgba(251,191,36,.45);
    --glow-accent-strong: rgba(251,191,36,.62);
    --glow-primary: rgba(109,40,217,.42);
    --glow-primary-strong: rgba(109,40,217,.62);
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background:
        radial-gradient(1200px 600px at 50% -10%, rgba(109,40,217,.22), transparent 60%),
        radial-gradient(900px 520px at 20% 20%, rgba(251,191,36,.14), transparent 55%),
        radial-gradient(900px 520px at 80% 30%, rgba(109,40,217,.12), transparent 60%),
        var(--color-surface);
    caret-color: var(--color-accent);
    accent-color: var(--color-accent);
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 1px 0 rgba(255,255,255,.05), 0 10px 30px rgba(109,40,217,.18); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] {
    border-radius: var(--radius-xl);
    background:
        linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
    box-shadow:
        0 10px 30px rgba(0,0,0,.44),
        0 0 0 1px rgba(251,191,36,.14),
        0 0 26px rgba(109,40,217,.18);
    padding: var(--space-card);
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        border-color var(--transition),
        filter var(--transition),
        background var(--transition);
    filter: saturate(1.02);
    position: relative;
    border-style: solid;
    border-color: rgba(251,191,36,.18);
    border-width: 1px;
}
.card::before, [class*="card"]::before{
    content:"";
    position:absolute;
    inset:-1px;
    border-radius: inherit;
    pointer-events:none;
    background:
        radial-gradient(500px 120px at 20% 0%, rgba(251,191,36,.18), transparent 60%),
        radial-gradient(520px 140px at 80% 0%, rgba(109,40,217,.22), transparent 62%),
        linear-gradient(180deg, rgba(255,255,255,.06), transparent);
    opacity: .9;
}
.card:hover, [class*="card"]:hover{
    box-shadow:
        0 18px 55px rgba(0,0,0,.56),
        0 0 0 1px rgba(251,191,36,.22),
        0 0 32px rgba(251,191,36,.26),
        0 0 34px rgba(109,40,217,.24);
    filter: saturate(1.06) brightness(1.03);
    transform: translateY(-2px);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        background var(--transition),
        border-color var(--transition),
        color var(--transition),
        filter var(--transition);
}
a:not([class]) {
    color: var(--color-accent);
    transition: color var(--transition), text-shadow var(--transition), filter var(--transition);
    text-shadow: 0 0 18px rgba(251,191,36,.15);
}

/* ========== 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); box-shadow: var(--shadow-md); }
                .news-grid .card:hover { box-shadow: var(--shadow-lg); }

/* features: grid-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }
.feature-list .card { background:
        radial-gradient(900px 200px at 0% 0%, rgba(109,40,217,.18), transparent 55%),
        linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
    box-shadow: var(--shadow-md);
}

/* hero: split */
/* 左文右图 */
                .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }
                .hero-inner .card { background:
        radial-gradient(700px 250px at 30% 0%, rgba(251,191,36,.16), transparent 58%),
        radial-gradient(700px 250px at 80% 10%, rgba(109,40,217,.22), transparent 62%),
        linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
    border-color: rgba(251,191,36,.20);
}

/* testimonials: stacked */
/* 垂直堆叠 */
                .testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; }
                .testimonial-list .card { background:
        linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
    border-color: rgba(109,40,217,.22);
    box-shadow:
        0 12px 35px rgba(0,0,0,.44),
        0 0 0 1px rgba(109,40,217,.18),
        0 0 26px rgba(251,191,36,.12);
}

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }
.partner-grid .card { border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); background: rgba(255,255,255,.03); border-color: rgba(251,191,36,.12); }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }
                .faq-wrapper .card { background:
        radial-gradient(700px 240px at 0% 0%, rgba(109,40,217,.20), transparent 60%),
        linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
    border-radius: var(--radius-xl);
}

/* stats: big-number */
/* 大数字居中 */
                .stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
                .stats-grid .stat-value { font-size: 3rem; text-shadow: 0 0 22px rgba(251,191,36,.18), 0 10px 45px rgba(109,40,217,.26); color: #ffffff; }
                .stats-grid .card { background: rgba(255,255,255,.03); border-color: rgba(251,191,36,.14); box-shadow: var(--shadow-sm); }

/* cta: full-bg */
.cta-section {
    background:
        radial-gradient(1000px 420px at 50% 0%, rgba(251,191,36,.35), transparent 60%),
        radial-gradient(900px 380px at 20% 20%, rgba(109,40,217,.35), transparent 55%),
        linear-gradient(135deg, rgba(109,40,217,.98), rgba(76,29,149,.92));
    color: #fbfbff;
    padding: 4rem 2rem;
    box-shadow:
        0 22px 80px rgba(0,0,0,.62),
        0 0 0 1px rgba(251,191,36,.20),
        0 0 42px rgba(251,191,36,.20);
    position: relative;
    isolation: isolate;
    border-radius: 18px;
}
.cta-section::before{
    content:"";
    position:absolute;
    inset:0;
    border-radius: inherit;
    pointer-events:none;
    background:
        radial-gradient(800px 220px at 50% 0%, rgba(255,255,255,.16), transparent 60%),
        radial-gradient(520px 170px at 10% 30%, rgba(251,191,36,.18), transparent 60%),
        radial-gradient(520px 170px at 90% 30%, rgba(109,40,217,.18), transparent 60%);
    opacity: .85;
    z-index: -1;
}

/* Page Layout: wide */
/* 超宽 */
            .page-main { max-width: 1400px; margin: 0 auto; }
.page-main{
    position: relative;
}
.page-main::after{
    content:"";
    position:absolute;
    left: 50%;
    top: -120px;
    transform: translateX(-50%);
    width: min(980px, 92vw);
    height: 260px;
    pointer-events:none;
    background:
        radial-gradient(closest-side, rgba(109,40,217,.22), transparent 70%);
    filter: blur(2px);
    opacity: .9;
}

/* 条件性装饰 */
header, .header, .navbar { background: transparent; }
header, .header, .navbar{
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(251,191,36,.10);
    box-shadow: 0 10px 40px rgba(0,0,0,.18);
}

/* 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; }
    .cta-section { padding: 3.25rem 1.5rem; }
}
@media (max-width: 640px) {
    :root { --space-section: 2.25rem; --space-card: 1.05rem; --space-gap: 0.85rem; --radius-xl: 16px; --radius-md: 16px; }
    .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 26px rgba(0,0,0,.44),
            0 0 0 1px rgba(251,191,36,.14),
            0 0 22px rgba(109,40,217,.16);
    }
}