:root {
    --color-primary: #4b2a7a;
    --color-primary-dark: #2a163f;
    --color-accent: #00b3a6;
    --color-surface: #eef7ff;
    --color-text: #132033;
    --rgb-primary: 75,42,122;
    --rgb-accent: 0,179,166;
    --radius-sm: 10px;
    --radius-md: 20px;
    --radius-lg: 28px;
    --radius-xl: 44px;
    --shadow-sm: 0 6px 18px rgba(16, 24, 40, 0.10);
    --shadow-md: 0 16px 40px rgba(16, 24, 40, 0.14);
    --shadow-lg: 0 28px 75px rgba(10, 14, 22, 0.18);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 520ms cubic-bezier(0.2, 0.9, 0.2, 1);
    --heading-weight: 650;
    --body-line-height: 1.7;
}

body { color: var(--color-text); line-height: var(--body-line-height); background: radial-gradient(1200px 600px at 10% -10%, rgba(0,179,166,0.12), transparent 55%), radial-gradient(900px 500px at 90% 0%, rgba(75,42,122,0.10), transparent 50%), linear-gradient(180deg, #f7fbff 0%, #ffffff 60%, #f6f9ff 100%); }

h1, h2, h3, h4 { font-weight: var(--heading-weight); color: #0f1a2b; text-shadow: 0 1px 0 rgba(255,255,255,0.7); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }

.card, [class*="card"] {
    border-radius: var(--radius-lg);
    background:
        radial-gradient(900px 220px at 25% 0%, rgba(0,179,166,0.12), transparent 60%),
        radial-gradient(700px 260px at 95% 10%, rgba(75,42,122,0.10), transparent 55%),
        linear-gradient(180deg, rgba(255,255,255,0.92) 0%, rgba(255,255,255,0.78) 100%);
    border: 1px solid rgba(18, 32, 51, 0.08);
    box-shadow:
        0 1px 0 rgba(255,255,255,0.8) inset,
        0 10px 24px rgba(16, 24, 40, 0.10),
        0 26px 60px rgba(16, 24, 40, 0.12);
    padding: var(--space-card);
    transition: transform 540ms cubic-bezier(0.2, 0.9, 0.2, 1), box-shadow 540ms cubic-bezier(0.2, 0.9, 0.2, 1), border-color 540ms cubic-bezier(0.2, 0.9, 0.2, 1), background 540ms cubic-bezier(0.2, 0.9, 0.2, 1), filter 540ms cubic-bezier(0.2, 0.9, 0.2, 1);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.card:hover, [class*="card"]:hover {
    box-shadow:
        0 1px 0 rgba(255,255,255,0.85) inset,
        0 14px 34px rgba(16, 24, 40, 0.14),
        0 38px 90px rgba(10, 14, 22, 0.16);
    border-color: rgba(0,179,166,0.28);
    transform: translateY(-2px);
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: 999px;
    transition: transform 480ms cubic-bezier(0.2, 0.9, 0.2, 1), box-shadow 480ms cubic-bezier(0.2, 0.9, 0.2, 1), background 480ms cubic-bezier(0.2, 0.9, 0.2, 1), border-color 480ms cubic-bezier(0.2, 0.9, 0.2, 1), color 480ms cubic-bezier(0.2, 0.9, 0.2, 1), filter 480ms cubic-bezier(0.2, 0.9, 0.2, 1);
    border: 1px solid rgba(18, 32, 51, 0.10);
    background: linear-gradient(180deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.68) 100%);
    box-shadow:
        0 1px 0 rgba(255,255,255,0.8) inset,
        0 10px 26px rgba(16, 24, 40, 0.10);
    color: rgba(19, 32, 51, 0.92);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    filter: saturate(1.05);
    caret-color: var(--color-accent);
    accent-color: var(--color-accent);
}
a[class*="btn"]:hover, .btn:hover, button[class*="btn"]:hover {
    transform: translateY(-2px);
    border-color: rgba(0,179,166,0.45);
    box-shadow:
        0 1px 0 rgba(255,255,255,0.85) inset,
        0 14px 34px rgba(16, 24, 40, 0.14),
        0 22px 70px rgba(0,179,166,0.16);
}

a:not([class]) { color: #3a2a66; transition: var(--transition); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 22px rgba(0,179,166,0.22); }

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

:focus-visible {
    outline: 3px solid rgba(0,179,166,0.35);
    outline-offset: 3px;
    border-radius: 14px;
}

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

/* news: featured-top */
/* 首篇横跨全宽 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
                .news-grid > *:first-child { grid-column: span 3; }

/* features: horizontal */
/* 水平滚动 */
                .feature-list { display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; padding: 6px 2px; }
                .feature-list > * { flex: 0 0 300px; scroll-snap-align: start; }

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

/* testimonials: carousel */
/* 单条轮播 */
                .testimonial-list { display: flex; overflow: hidden; border-radius: var(--radius-xl); }
                .testimonial-list > * { flex: 0 0 100%; }

/* 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 > * {
    border-radius: var(--radius-md);
    border: 1px solid rgba(18, 32, 51, 0.07);
    background: rgba(255,255,255,0.60);
    box-shadow: 0 10px 24px rgba(16, 24, 40, 0.06);
}

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }
.faq-list > * {
    border-radius: var(--radius-md);
    background: rgba(255,255,255,0.62);
    border: 1px solid rgba(18, 32, 51, 0.07);
    box-shadow: 0 12px 28px rgba(16, 24, 40, 0.08);
}

/* 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; color: #0b1630; text-shadow: 0 14px 40px rgba(75,42,122,0.18); }

/* cta: full-bg */
.cta-section {
    background:
        radial-gradient(1200px 420px at 15% 0%, rgba(0,179,166,0.35), transparent 55%),
        radial-gradient(900px 360px at 90% 10%, rgba(255,255,255,0.20), transparent 50%),
        linear-gradient(135deg, #3a1d62 0%, #2a163f 55%, #0f1a2b 100%);
    color: #f2f7ff;
    padding: 4rem 2rem;
    border-top-left-radius: var(--radius-xl);
    border-top-right-radius: var(--radius-xl);
    border: 1px solid rgba(255,255,255,0.10);
    box-shadow:
        0 -1px 0 rgba(255,255,255,0.10) inset,
        0 20px 80px rgba(0,0,0,0.18);
}
.cta-section * { color: inherit; }
.cta-section .btn, .cta-section button[class*="btn"], .cta-section a[class*="btn"] {
    background: linear-gradient(180deg, rgba(0,179,166,0.95) 0%, rgba(0,179,166,0.78) 100%);
    border-color: rgba(255,255,255,0.20);
    color: #062225;
    box-shadow:
        0 1px 0 rgba(255,255,255,0.40) inset,
        0 18px 40px rgba(0,179,166,0.28),
        0 26px 70px rgba(0,0,0,0.18);
}
.cta-section a:not([class]) { color: rgba(226, 255, 252, 0.95); }
.cta-section a:not([class]):hover { color: #b9fff7; text-shadow: 0 0 24px rgba(0,179,166,0.28); }

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
            .page-main { max-width: 1200px; margin: 0 auto; }

/* 条件性装饰 */
a:not([class]):hover { color: var(--color-accent); }
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; }
}