:root {
    --color-primary: #5b21b6;
    --color-primary-dark: #3b0764;
    --color-accent: #f59e0b;
    --color-surface: #f8fafc;
    --color-text: #0f172a;
    --rgb-primary: 91,33,182;
    --rgb-accent: 245,158,11;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 22px;
    --shadow-sm:
        0 1px 0 rgba(15, 23, 42, .10),
        0 6px 14px rgba(91, 33, 182, .10);
    --shadow-md:
        0 2px 0 rgba(15, 23, 42, .08),
        0 10px 28px rgba(91, 33, 182, .16),
        0 2px 10px rgba(245, 158, 11, .08);
    --shadow-lg:
        0 6px 0 rgba(15, 23, 42, .10),
        0 18px 60px rgba(91, 33, 182, .22),
        0 6px 22px rgba(245, 158, 11, .14);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.55s cubic-bezier(0.16, 1, 0.3, 1);
    --heading-weight: 650;
    --body-line-height: 1.6;

    --stage-bg: #0f0f1a;
    --stage-ink: rgba(248, 250, 252, .92);
    --gold-glow: rgba(245, 158, 11, .35);
    --purple-glow: rgba(91, 33, 182, .38);
    --card-border: rgba(91, 33, 182, .28);
    --card-border-2: rgba(245, 158, 11, .22);
}

body { color: var(--color-text); line-height: var(--body-line-height); background: radial-gradient(1200px 700px at 50% -150px, rgba(91, 33, 182, .22), transparent 60%), radial-gradient(900px 520px at 15% 20%, rgba(245, 158, 11, .18), transparent 55%), linear-gradient(180deg, #0f0f1a 0%, #121126 45%, #0f172a 100%); }

h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 1px 0 rgba(255,255,255,.06), 0 10px 35px rgba(91, 33, 182, .18); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] {
    border-radius: var(--radius-xl);
    padding: var(--space-card);
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        border-color var(--transition),
        background var(--transition),
        filter var(--transition);
    box-shadow:
        0 0 0 1px rgba(248, 250, 252, .06),
        0 1px 0 rgba(255,255,255,.06),
        0 18px 55px rgba(91, 33, 182, .18),
        0 10px 28px rgba(245, 158, 11, .10);
    background:
        radial-gradient(900px 420px at 25% -20%, rgba(245, 158, 11, .14), transparent 55%),
        radial-gradient(700px 360px at 100% 0%, rgba(91, 33, 182, .22), transparent 50%),
        linear-gradient(180deg, rgba(248,250,252,.98), rgba(248,250,252,.92));
    border: 1px solid rgba(91, 33, 182, .18);
    position: relative;
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        background var(--transition),
        color var(--transition),
        border-color var(--transition),
        filter var(--transition);
}

a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-thickness: 2px; text-underline-offset: 3px; }
a:not([class]):focus-visible { outline: 2px solid rgba(var(--rgb-accent), .55); outline-offset: 3px; border-radius: 10px; }

:focus { outline-color: rgba(var(--rgb-accent), .55); }

.card:focus-within, [class*="card"]:focus-within {
    box-shadow:
        0 0 0 3px rgba(var(--rgb-accent), .22),
        0 0 0 1px rgba(248, 250, 252, .08),
        0 20px 70px rgba(91, 33, 182, .25),
        0 14px 40px rgba(245, 158, 11, .14);
}

.card:hover, [class*="card"]:hover {
    transform: translateY(-6px);
    box-shadow:
        0 0 0 1px rgba(248, 250, 252, .10),
        0 30px 90px rgba(91, 33, 182, .26),
        0 18px 48px rgba(245, 158, 11, .16),
        0 2px 18px rgba(0,0,0,.20);
    border-color: rgba(245, 158, 11, .34);
}

.btn:active, button[class*="btn"]:active, a[class*="btn"]:active {
    transform: translateY(0px) scale(.99);
    filter: saturate(1.05) contrast(1.02);
}

/* ========== 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);
                    background:
                        radial-gradient(700px 360px at 18% -35%, rgba(245, 158, 11, .18), transparent 55%),
                        radial-gradient(620px 320px at 95% 0%, rgba(91, 33, 182, .26), transparent 48%),
                        linear-gradient(180deg, rgba(248,250,252,.98), rgba(248,250,252,.90));
                    box-shadow:
                        0 0 0 1px rgba(91, 33, 182, .14),
                        0 14px 44px rgba(91, 33, 182, .16),
                        0 10px 28px rgba(0,0,0,.16);
                }

/* features: horizontal */
/* 水平滚动 */
                .feature-list { display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; }
                .feature-list > * { flex: 0 0 300px; scroll-snap-align: start; }
                .feature-list::-webkit-scrollbar { height: 10px; }
                .feature-list::-webkit-scrollbar-track { background: rgba(248,250,252,.06); border-radius: 999px; }
                .feature-list::-webkit-scrollbar-thumb {
                    background: linear-gradient(90deg, rgba(91, 33, 182, .55), rgba(245, 158, 11, .55));
                    border-radius: 999px;
                    border: 2px solid rgba(15,15,26,.35);
                }

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

/* 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:
                        radial-gradient(760px 390px at 15% -15%, rgba(91, 33, 182, .22), transparent 55%),
                        radial-gradient(680px 340px at 110% 30%, rgba(245, 158, 11, .16), transparent 52%),
                        linear-gradient(180deg, rgba(248,250,252,.98), rgba(248,250,252,.92));
                }

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }
.partner-grid .card {
    border-radius: 18px;
    background:
        linear-gradient(180deg, rgba(248,250,252,.97), rgba(248,250,252,.90));
    box-shadow:
        0 0 0 1px rgba(248,250,252,.08),
        0 16px 50px rgba(91, 33, 182, .14);
}

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-list .card { background: linear-gradient(180deg, rgba(248,250,252,.97), rgba(248,250,252,.90)); }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }
.stats-grid .card {
    border-radius: 20px;
    background:
        radial-gradient(580px 240px at 50% -20%, rgba(245, 158, 11, .18), transparent 55%),
        radial-gradient(520px 240px at 20% 110%, rgba(91, 33, 182, .22), transparent 55%),
        linear-gradient(180deg, rgba(248,250,252,.98), rgba(248,250,252,.90));
}

/* 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 */
.hero, [class*="hero"], section:first-of-type {
    background:
        radial-gradient(1100px 520px at 50% 0%, rgba(245, 158, 11, .20), transparent 55%),
        radial-gradient(900px 520px at 0% 45%, rgba(91, 33, 182, .26), transparent 60%),
        linear-gradient(135deg, #0b0b18 0%, #151528 50%, #0f172a 100%);
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,.06),
        inset 0 -1px 0 rgba(0,0,0,.35);
}

.card { border-left: 4px solid transparent; border-image: linear-gradient(180deg, rgba(245,158,11,.95), rgba(91,33,182,.92)) 1; }

header, .header, .navbar { background: transparent; }
.navbar, header { backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }

/* Links hover treatments */
a:not([class]):hover { color: #c2410c; text-shadow: 0 0 22px rgba(var(--rgb-accent), .30); }

/* 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; --radius-lg: 18px; --radius-xl: 20px; --transition: 0.45s cubic-bezier(0.2, 1, 0.35, 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; }
}