:root {
    --color-primary: #0ea5e9;
    --color-primary-dark: #0284c7;
    --color-accent: #a78bfa;
    --color-surface: #f0f9ff;
    --color-text: #0b1220;
    --rgb-primary: 14,165,233;
    --rgb-accent: 167,139,250;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 26px;
    --shadow-sm: 0 10px 24px rgba(2, 132, 199, .14);
    --shadow-md: 0 18px 44px rgba(2, 132, 199, .16), 0 2px 0 rgba(167, 139, 250, .22);
    --shadow-lg: 0 30px 90px rgba(2, 132, 199, .18), 0 14px 30px rgba(167, 139, 250, .14), 0 2px 0 rgba(14, 165, 233, .24);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 520ms cubic-bezier(0.16, 1, 0.3, 1);
    --heading-weight: 800;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: radial-gradient(1200px 600px at 15% -10%, rgba(167, 139, 250, .14) 0%, rgba(167, 139, 250, 0) 60%), radial-gradient(900px 500px at 90% 0%, rgba(14, 165, 233, .14) 0%, rgba(14, 165, 233, 0) 55%), var(--color-surface); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: 0 26px 70px rgba(2, 132, 199, .14), 0 10px 26px rgba(167, 139, 250, .10), 0 2px 0 rgba(14, 165, 233, .22); padding: var(--space-card); transition: var(--transition); background: linear-gradient(180deg, rgba(255,255,255,.78) 0%, rgba(255,255,255,.92) 100%); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); box-shadow: 0 16px 40px rgba(167, 139, 250, .14), 0 3px 0 rgba(14, 165, 233, .18); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-shadow: 0 0 0 rgba(0,0,0,0); }
h1, h2, h3, h4 { letter-spacing: -0.02em; }
.card * { text-shadow: none; }

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

/* news: list-view */
/* 列表模式 (图左文右) */
                .news-grid { display: flex; flex-direction: column; gap: var(--space-gap); }
                .news-grid .card { display: grid; grid-template-columns: 280px 1fr; border-radius: var(--radius-xl); box-shadow: 0 34px 88px rgba(2, 132, 199, .18), 0 12px 28px rgba(167, 139, 250, .12), 0 2px 0 rgba(14, 165, 233, .26); background: linear-gradient(135deg, rgba(14, 165, 233, .08) 0%, rgba(167, 139, 250, .08) 100%), rgba(255,255,255,.9); border: 1px solid rgba(2, 132, 199, .20); }

/* features: grid-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }
.feature-list .card { border-radius: var(--radius-xl); box-shadow: 0 22px 62px rgba(167, 139, 250, .15), 0 10px 20px rgba(2, 132, 199, .10), 0 2px 0 rgba(14, 165, 233, .20); border: 1px solid rgba(167, 139, 250, .22); background: linear-gradient(180deg, rgba(255,255,255,.86) 0%, rgba(240,249,255,.72) 100%); }

/* hero: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; }
.hero { border-radius: var(--radius-xl); overflow: hidden; background: linear-gradient(120deg, rgba(14, 165, 233, .18) 0%, rgba(167, 139, 250, .16) 45%, rgba(2, 132, 199, .12) 100%) !important; border: 1px solid rgba(14, 165, 233, .18); box-shadow: 0 40px 120px rgba(2, 132, 199, .18), 0 18px 50px rgba(167, 139, 250, .12), 0 2px 0 rgba(167, 139, 250, .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 { border-radius: 22px; box-shadow: 0 26px 74px rgba(167, 139, 250, .16), 0 10px 24px rgba(14, 165, 233, .10), 0 2px 0 rgba(2, 132, 199, .20); border: 1px solid rgba(14, 165, 233, .18); background: linear-gradient(180deg, rgba(255,255,255,.86) 0%, rgba(255,255,255,.96) 100%); }

/* 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: 18px; box-shadow: 0 20px 56px rgba(2, 132, 199, .14), 0 8px 22px rgba(167, 139, 250, .10); border: 1px solid rgba(167, 139, 250, .18); background: linear-gradient(135deg, rgba(14, 165, 233, .10) 0%, rgba(167, 139, 250, .10) 100%), rgba(255,255,255,.9); }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }
.faq-list .card { border-radius: 24px; box-shadow: 0 30px 86px rgba(2, 132, 199, .16), 0 12px 32px rgba(167, 139, 250, .10), 0 2px 0 rgba(167, 139, 250, .18); border: 1px solid rgba(2, 132, 199, .20); background: linear-gradient(180deg, rgba(240,249,255,.88) 0%, rgba(255,255,255,.94) 100%); }

/* stats: inline */
/* 水平排列 */
                .stats-grid { display: flex; justify-content: center; gap: 3rem; }
                .stats-grid .card { border-radius: 999px; box-shadow: 0 26px 70px rgba(167, 139, 250, .16), 0 14px 34px rgba(2, 132, 199, .10), 0 2px 0 rgba(14, 165, 233, .22); border: 1px solid rgba(167, 139, 250, .22); background: linear-gradient(135deg, rgba(167, 139, 250, .14) 0%, rgba(14, 165, 233, .10) 100%), rgba(255,255,255,.9); }

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }
.cta-inner .card { border-radius: 26px; border: 1px solid rgba(2, 132, 199, .20); box-shadow: 0 36px 110px rgba(2, 132, 199, .18), 0 18px 52px rgba(167, 139, 250, .12), 0 2px 0 rgba(167, 139, 250, .18); background: linear-gradient(120deg, rgba(14, 165, 233, .16) 0%, rgba(167, 139, 250, .12) 45%, rgba(255,255,255,.95) 100%); }

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

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-6px); box-shadow: 0 44px 130px rgba(2, 132, 199, .22), 0 20px 60px rgba(167, 139, 250, .14), 0 2px 0 rgba(14, 165, 233, .28); }
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 10px 28px rgba(167, 139, 250, .35); }
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(135deg, rgba(14, 165, 233, .95) 0%, rgba(2, 132, 199, .92) 40%, rgba(167, 139, 250, .88) 100%); border-top-left-radius: var(--radius-xl); border-top-right-radius: var(--radius-xl); border-bottom-left-radius: 18px; border-bottom-right-radius: 18px; box-shadow: 0 60px 180px rgba(2, 132, 199, .22), 0 28px 90px rgba(167, 139, 250, .14), inset 0 0 0 1px rgba(255,255,255,.22); }
.card { border-left: 3px solid rgba(14, 165, 233, .95); }

/* 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; --transition: 460ms cubic-bezier(0.16, 1, 0.3, 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; }
}