:root {
    --color-primary: #b517ff;
    --color-primary-dark: #6a00b8;
    --color-accent: #36d1dc;
    --color-surface: #f7f3ff;
    --color-text: #eaf0ff;
    --rgb-primary: 181,23,255;
    --rgb-accent: 54,209,220;
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 30px;
    --radius-xl: 44px;

    --shadow-sm: 0 10px 22px rgba(0,0,0,.26);
    --shadow-md:
        0 20px 44px rgba(0,0,0,.34),
        0 2px 0 rgba(255,255,255,.06) inset,
        0 -1px 0 rgba(255,255,255,.04) inset;
    --shadow-lg:
        0 30px 70px rgba(0,0,0,.46),
        0 10px 22px rgba(0,0,0,.22),
        0 0 0 1px rgba(181,23,255,.22) inset,
        0 0 0 1px rgba(54,209,220,.12);

    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;

    --transition: 0.55s cubic-bezier(.2,.9,.2,1);
    --heading-weight: 700;
    --body-line-height: 1.75;

    --stage-bg0: #0b0b15;
    --stage-bg1: #101026;
    --stage-glow: rgba(181,23,255,.28);
    --stage-glow2: rgba(54,209,220,.22);
    --card-edge: rgba(181,23,255,.26);
    --card-edge2: rgba(54,209,220,.18);
    --text-dim: rgba(234,240,255,.76);
    --cta-grad-a: #b517ff;
    --cta-grad-b: #36d1dc;
    --cta-grad-c: #ffd166;
    --focus-outline: rgba(54,209,220,.65);
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background:
        radial-gradient(1200px 600px at 50% -10%, rgba(181,23,255,.36), transparent 60%),
        radial-gradient(900px 520px at 10% 10%, rgba(54,209,220,.22), transparent 55%),
        radial-gradient(700px 500px at 90% 20%, rgba(255,209,102,.12), transparent 60%),
        linear-gradient(180deg, var(--stage-bg1) 0%, var(--stage-bg0) 100%);
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); }

section, .section {
    padding-top: var(--space-section);
    padding-bottom: var(--space-section);
    background:
        linear-gradient(180deg, rgba(255,255,255,.02) 0%, rgba(255,255,255,0) 100%);
}

.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--space-card);
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        border-color var(--transition),
        background var(--transition),
        color var(--transition),
        filter var(--transition);
    background:
        radial-gradient(800px 240px at 15% 0%, rgba(181,23,255,.18), transparent 55%),
        radial-gradient(900px 260px at 85% 0%, rgba(54,209,220,.15), transparent 60%),
        linear-gradient(180deg, rgba(255,255,255,.08) 0%, rgba(255,255,255,.03) 100%);
    border: 1px solid rgba(255,255,255,.08);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.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);
    background:
        linear-gradient(135deg, rgba(var(--rgb-primary),.98) 0%, rgba(var(--rgb-accent),.88) 55%, rgba(255,209,102,.42) 120%);
    color: rgba(255,255,255,.96);
    border: 1px solid rgba(255,255,255,.14);
    box-shadow:
        0 18px 40px rgba(181,23,255,.22),
        0 10px 20px rgba(54,209,220,.12),
        0 0 0 1px rgba(0,0,0,.25) inset;
    text-shadow: 0 2px 10px rgba(0,0,0,.35);
}
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover {
    filter: saturate(1.08) brightness(1.04);
    box-shadow:
        0 26px 60px rgba(181,23,255,.28),
        0 16px 26px rgba(54,209,220,.16),
        0 0 0 1px rgba(0,0,0,.28) inset;
}

a:not([class]) {
    color: rgba(54,209,220,.92);
    transition:
        color var(--transition),
        text-shadow var(--transition),
        filter var(--transition);
    text-shadow: 0 0 18px rgba(54,209,220,.18);
}

a:not([class]):hover {
    color: rgba(181,23,255,.96);
    text-shadow:
        0 0 28px rgba(181,23,255,.30),
        0 0 14px rgba(54,209,220,.14);
}

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

/* news: featured-left */
/* 左大右小 (1大+2小) */
                .news-grid { display: grid; grid-template-columns: 2fr 1fr; grid-template-rows: auto auto; gap: var(--space-gap); }
                .news-grid > *:first-child { grid-row: span 2; }

/* features: grid-3 */
.feature-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

/* hero: left-aligned */
.hero-content { text-align: left; max-width: 600px; }

/* 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: 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: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }

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

/* 条件性装饰 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-6px);
    box-shadow:
        0 38px 92px rgba(0,0,0,.55),
        0 18px 44px rgba(0,0,0,.28),
        0 0 0 1px rgba(181,23,255,.34) inset,
        0 0 0 1px rgba(54,209,220,.22);
    filter: saturate(1.04) contrast(1.02);
    border-color: rgba(181,23,255,.42);
}

a:not([class]):hover { color: rgba(var(--rgb-accent),.96); }

.card {
    border-style: solid;
    border-color: rgba(var(--rgb-primary), .22);
    border-width: 1px;
    border-image: linear-gradient(135deg, rgba(var(--rgb-primary),.78) 0%, rgba(var(--rgb-accent),.55) 55%, rgba(255,209,102,.35) 100%) 1;
}

header, .header, .navbar {
    box-shadow:
        0 16px 34px rgba(0,0,0,.34),
        0 1px 0 rgba(255,255,255,.06) inset;
    background:
        linear-gradient(180deg, rgba(255,255,255,.06) 0%, rgba(255,255,255,.02) 100%);
    border-bottom: 1px solid rgba(255,255,255,.08);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

:focus-visible {
    outline: 2px solid var(--focus-outline);
    outline-offset: 3px;
    border-radius: 12px;
}

/* 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; }
}

/* Decorative: centered-stage cue without layout changes */
.page-main {
    background:
        radial-gradient(1000px 420px at 50% 0%, rgba(181,23,255,.16), transparent 58%),
        radial-gradient(900px 360px at 50% 20%, rgba(54,209,220,.12), transparent 60%),
        linear-gradient(180deg, rgba(255,255,255,.02) 0%, rgba(255,255,255,0) 100%);
    border-radius: 28px;
    padding: 0 0;
}

@media (prefers-reduced-motion: reduce) {
    :root { --transition: 0.01s linear; }
    .card, [class*="card"], .btn, button[class*="btn"], a[class*="btn"], a:not([class]) { transition: none !important; }
}