:root {
    --color-primary: #ff2d55;
    --color-primary-dark: #b1002b;
    --color-accent: #00d4ff;
    --color-surface: #0b1020;
    --color-text: #f2f7ff;
    --rgb-primary: 255,45,85;
    --rgb-accent: 0,212,255;

    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 24px;

    --shadow-sm:
        0 2px 6px rgba(0, 0, 0, 0.10),
        0 10px 24px rgba(0, 0, 0, 0.06);
    --shadow-md:
        0 4px 10px rgba(0, 0, 0, 0.10),
        0 18px 34px -14px rgba(0, 0, 0, 0.20);
    --shadow-lg:
        0 6px 16px rgba(0, 0, 0, 0.14),
        0 28px 60px -18px rgba(0, 0, 0, 0.28),
        0 1px 0 rgba(255, 255, 255, 0.06) inset;

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

    --transition: 0.38s cubic-bezier(0.2, 0.9, 0.2, 1);
    --heading-weight: 700;
    --body-line-height: 1.75;
}

body { 
    color: var(--color-text);
    line-height: var(--body-line-height);
    background:
        radial-gradient(1200px 600px at 10% -10%, rgba(255, 45, 85, 0.28), transparent 55%),
        radial-gradient(900px 500px at 90% 0%, rgba(0, 212, 255, 0.22), transparent 52%),
        radial-gradient(700px 420px at 50% 95%, rgba(255, 255, 255, 0.10), transparent 55%),
        linear-gradient(180deg, #070a14 0%, #0b1020 55%, #070a14 100%);
    backdrop-filter: saturate(1.08);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 { font-weight: var(--heading-weight); letter-spacing: 0.2px; }

section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }

.card, [class*="card"] { 
    border-radius: var(--radius-lg);
    box-shadow:
        0 4px 8px rgba(0,0,0,0.05),
        0 20px 40px -10px rgba(0,0,0,0.12);
    padding: var(--space-card);
    transition: transform 0.38s cubic-bezier(0.2, 0.9, 0.2, 1), box-shadow 0.38s cubic-bezier(0.2, 0.9, 0.2, 1), background-color 0.38s cubic-bezier(0.2, 0.9, 0.2, 1), border-color 0.38s cubic-bezier(0.2, 0.9, 0.2, 1), color 0.38s cubic-bezier(0.2, 0.9, 0.2, 1);
    background:
        linear-gradient(180deg, rgba(255,255,255,0.06) 0%, rgba(255,255,255,0.03) 100%);
    border: 1px solid rgba(255,255,255,0.10);
    color: var(--color-text);
    outline: 0;
}

.btn, button[class*="btn"], a[class*="btn"] { 
    border-radius: var(--radius-md);
    transition: 0.38s cubic-bezier(0.2, 0.9, 0.2, 1);
}

a:not([class]) { 
    color: var(--color-accent);
    transition: 0.38s cubic-bezier(0.2, 0.9, 0.2, 1);
    text-shadow: 0 0 0 rgba(0,0,0,0);
}

a:not([class]):hover { 
    color: var(--color-primary);
    text-shadow: 0 10px 26px rgba(255,45,85,0.22);
}

/* ========== 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); }
                .news-grid .card {
                    background:
                        radial-gradient(900px 260px at 20% 0%, rgba(255,45,85,0.18), transparent 55%),
                        linear-gradient(180deg, rgba(255,255,255,0.07) 0%, rgba(255,255,255,0.03) 100%);
                    border-color: rgba(255, 45, 85, 0.20);
                }
                .news-grid .card:nth-child(3n+1) {
                    background:
                        radial-gradient(900px 260px at 0% 10%, rgba(0,212,255,0.22), transparent 55%),
                        linear-gradient(180deg, rgba(255,255,255,0.06) 0%, rgba(255,255,255,0.03) 100%);
                    border-color: rgba(0, 212, 255, 0.22);
                }
                .news-grid .card:nth-child(3n+2) {
                    background:
                        radial-gradient(900px 260px at 90% 0%, rgba(255,255,255,0.14), transparent 55%),
                        linear-gradient(180deg, rgba(255,255,255,0.06) 0%, rgba(255,255,255,0.03) 100%);
                    border-color: rgba(255,255,255,0.14);
                }

/* features: grid-3 */
.feature-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
.feature-list .card {
    background:
        radial-gradient(650px 220px at 30% 0%, rgba(0,212,255,0.18), transparent 55%),
        linear-gradient(180deg, rgba(255,255,255,0.06) 0%, rgba(255,255,255,0.03) 100%);
    border-color: rgba(0, 212, 255, 0.18);
    box-shadow:
        0 4px 8px rgba(0,0,0,0.05),
        0 18px 30px -14px rgba(0,0,0,0.22);
}
.feature-list .card:nth-child(2n) {
    background:
        radial-gradient(650px 220px at 70% 0%, rgba(255,45,85,0.16), transparent 55%),
        linear-gradient(180deg, rgba(255,255,255,0.06) 0%, rgba(255,255,255,0.03) 100%);
    border-color: rgba(255, 45, 85, 0.18);
}

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

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
                .testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }
                .testimonial-list > * {
                    border-radius: var(--radius-lg);
                    background:
                        radial-gradient(820px 260px at 50% 0%, rgba(255,45,85,0.12), transparent 56%),
                        linear-gradient(180deg, rgba(255,255,255,0.06) 0%, rgba(255,255,255,0.03) 100%);
                    border: 1px solid rgba(255,255,255,0.10);
                    box-shadow:
                        0 4px 10px rgba(0,0,0,0.05),
                        0 22px 46px -16px rgba(0,0,0,0.22);
                }
                .testimonial-list > *:nth-child(4n+1) { border-color: rgba(255,45,85,0.20); }
                .testimonial-list > *:nth-child(4n+3) { border-color: rgba(0,212,255,0.20); }

/* partners: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 20s linear infinite; }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }
.faq-list .card {
    background:
        linear-gradient(135deg, rgba(255,45,85,0.16) 0%, rgba(0,212,255,0.12) 55%, rgba(255,255,255,0.04) 100%),
        linear-gradient(180deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.02) 100%);
    border-color: rgba(255,255,255,0.12);
    box-shadow:
        0 3px 10px rgba(0,0,0,0.06),
        0 26px 54px -20px rgba(0,0,0,0.26);
}

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }
.stats-grid .card {
    background:
        radial-gradient(600px 240px at 50% 0%, rgba(0,212,255,0.16), transparent 60%),
        linear-gradient(180deg, rgba(255,255,255,0.06) 0%, rgba(255,255,255,0.03) 100%);
    border-color: rgba(0, 212, 255, 0.18);
}

/* cta: card-style */
.cta-inner { 
    background:
        radial-gradient(900px 360px at 25% 0%, rgba(255,45,85,0.25), transparent 55%),
        radial-gradient(900px 360px at 85% 10%, rgba(0,212,255,0.20), transparent 55%),
        linear-gradient(180deg, rgba(255,255,255,0.08) 0%, rgba(255,255,255,0.03) 100%);
    border-radius: var(--radius-xl);
    padding: 3rem;
    text-align: center;
    border: 1px solid rgba(255,255,255,0.14);
    box-shadow:
        0 6px 18px rgba(0,0,0,0.10),
        0 28px 70px -22px rgba(0,0,0,0.34),
        0 1px 0 rgba(255,255,255,0.08) inset;
    transition: 0.45s cubic-bezier(0.2, 0.9, 0.2, 1);
}

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

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(255,255,255,0.18); }
.card:hover { background-color: rgba(255,255,255,0.05); }

header, .header, .navbar { background: transparent; }

/* 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; }
}