:root {
    --color-primary: #0ea5e9;
    --color-primary-dark: #0369a1;
    --color-accent: #22c55e;
    --color-surface: #f0f9ff;
    --color-text: #0b1220;
    --rgb-primary: 14,165,233;
    --rgb-accent: 34,197,94;
    --radius-sm: 0px;
    --radius-md: 2px;
    --radius-lg: 3px;
    --radius-xl: 4px;
    --shadow-sm: 4px 4px 0px rgba(3, 105, 161, .18);
    --shadow-md: 4px 4px 0px rgba(11, 18, 32, .12), 8px 8px 18px rgba(14, 165, 233, .10);
    --shadow-lg: 4px 4px 0px rgba(34, 197, 94, .18), 10px 10px 28px rgba(11, 18, 32, .16), 0 0 0 2px rgba(14,165,233,.14);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.15s cubic-bezier(.2,.9,.2,1);
    --heading-weight: 900;
    --body-line-height: 1.75;
    --accent-glow: rgba(34,197,94,.22);
    --border-strong: rgba(3, 105, 161, .45);
}

body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(120deg, rgba(14,165,233,.10), rgba(34,197,94,.08) 55%, rgba(34,197,94,.00)); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 1px 0 rgba(255,255,255,.7), 2px 2px 0 rgba(14,165,233,.08); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }

.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);
    border: 2px solid rgba(3, 105, 161, .35);
    background:
        linear-gradient(135deg, rgba(14,165,233,.10), rgba(34,197,94,.06)) ,
        var(--color-surface);
    position: relative;
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: background-color var(--transition), box-shadow var(--transition), transform var(--transition), border-color var(--transition), color var(--transition);
    border: 2px solid rgba(3, 105, 161, .35);
}
a:not([class]) {
    color: var(--color-primary);
    transition: color var(--transition), text-shadow var(--transition), background var(--transition);
    text-decoration: none;
    outline: 2px solid transparent;
    outline-offset: 3px;
}
a:not([class]):hover, a:not([class]):focus {
    color: var(--color-primary-dark);
    text-shadow: 0 0 0 rgba(0,0,0,0), 2px 2px 0 rgba(14,165,233,.20);
    outline-color: rgba(14,165,233,.35);
}

/* ========== 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; }
                .news-grid > * { border-color: rgba(3, 105, 161, .30); }
                .news-grid > *:first-child {
                    background:
                        linear-gradient(90deg, rgba(14,165,233,.16), rgba(14,165,233,.06) 40%, rgba(34,197,94,.10)),
                        var(--color-surface);
                    border-color: rgba(34, 197, 94, .42);
                    box-shadow: 4px 4px 0px rgba(34,197,94,.20), 12px 12px 30px rgba(11,18,32,.12);
                }
                .news-grid > *:not(:first-child) {
                    background:
                        linear-gradient(180deg, rgba(3,105,161,.10), rgba(34,197,94,.05)),
                        var(--color-surface);
                    border-color: rgba(14,165,233,.35);
                    box-shadow: 4px 4px 0px rgba(14,165,233,.16), 10px 10px 22px rgba(11,18,32,.10);
                }

/* features: centered */
/* 居中大卡片 */
                .feature-list { display: flex; flex-direction: column; align-items: center; gap: calc(var(--space-gap) * 2); max-width: 720px; margin: 0 auto; }
                .feature-list .card, .feature-list [class*="card"] {
                    border-radius: var(--radius-md);
                    border-color: rgba(34,197,94,.40);
                    background:
                        radial-gradient(120% 90% at 0% 0%, rgba(34,197,94,.18), rgba(34,197,94,.00) 58%),
                        linear-gradient(135deg, rgba(14,165,233,.12), rgba(255,255,255,.65)),
                        var(--color-surface);
                    box-shadow: 4px 4px 0px rgba(11,18,32,.10), 10px 10px 24px rgba(34,197,94,.10);
                }

/* hero: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; }
.hero-content .card, .hero-content [class*="card"] {
    background:
        conic-gradient(from 180deg at 50% 50%, rgba(14,165,233,.22), rgba(34,197,94,.18), rgba(14,165,233,.08), rgba(14,165,233,.22));
    border-color: rgba(3,105,161,.44);
    box-shadow: 4px 4px 0px rgba(3,105,161,.22), 14px 14px 36px rgba(11,18,32,.14);
    border-radius: var(--radius-xl);
}

/* testimonials: carousel */
/* 单条轮播 */
                .testimonial-list { display: flex; overflow: hidden; } 
                .testimonial-list > * { flex: 0 0 100%; }
                .testimonial-list > * .card, .testimonial-list > * [class*="card"] {
                    border-radius: var(--radius-lg);
                    border-color: rgba(34,197,94,.38);
                    background:
                        linear-gradient(120deg, rgba(34,197,94,.14), rgba(14,165,233,.08)),
                        var(--color-surface);
                    box-shadow: 4px 4px 0px rgba(34,197,94,.18), 10px 10px 24px rgba(11,18,32,.12);
                }

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
.partner-grid .card, .partner-grid [class*="card"] {
    border-radius: var(--radius-sm);
    border-color: rgba(3,105,161,.42);
    background:
        linear-gradient(0deg, rgba(14,165,233,.16), rgba(34,197,94,.06)),
        var(--color-surface);
    box-shadow: 4px 4px 0px rgba(14,165,233,.18);
}

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }
                .faq-wrapper .card, .faq-wrapper [class*="card"] {
                    border-radius: 2px;
                    border: 2px solid rgba(3,105,161,.35);
                    background:
                        linear-gradient(135deg, rgba(14,165,233,.13), rgba(34,197,94,.08)),
                        var(--color-surface);
                    box-shadow: 4px 4px 0px rgba(3,105,161,.18), 10px 10px 26px rgba(11,18,32,.10);
                }
                .faq-wrapper > :first-child .card, .faq-wrapper > :first-child [class*="card"] {
                    border-color: rgba(34,197,94,.42);
                    box-shadow: 4px 4px 0px rgba(34,197,94,.20), 12px 12px 30px rgba(11,18,32,.12);
                }
                .faq-wrapper > :last-child .card, .faq-wrapper > :last-child [class*="card"] {
                    border-color: rgba(14,165,233,.45);
                    box-shadow: 4px 4px 0px rgba(14,165,233,.18), 10px 10px 24px rgba(11,18,32,.12);
                }

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }
.stats-grid .card, .stats-grid [class*="card"] {
    border-radius: 0px;
    border-color: rgba(3,105,161,.40);
    background:
        linear-gradient(90deg, rgba(14,165,233,.16), rgba(255,255,255,.70)),
        var(--color-surface);
    box-shadow: 4px 4px 0px rgba(3,105,161,.20), 10px 10px 20px rgba(11,18,32,.10);
}
.stats-grid .card:nth-child(2), .stats-grid [class*="card"]:nth-child(2) {
    border-color: rgba(34,197,94,.44);
    background:
        radial-gradient(110% 100% at 20% 10%, rgba(34,197,94,.20), rgba(34,197,94,.00) 55%),
        var(--color-surface);
}
.stats-grid .card:nth-child(3), .stats-grid [class*="card"]:nth-child(3) {
    border-color: rgba(14,165,233,.48);
    background:
        conic-gradient(from 210deg at 50% 50%, rgba(14,165,233,.20), rgba(34,197,94,.10), rgba(14,165,233,.08));
}
.stats-grid .card:nth-child(4), .stats-grid [class*="card"]:nth-child(4) {
    border-color: rgba(34,197,94,.36);
    background:
        linear-gradient(180deg, rgba(34,197,94,.16), rgba(14,165,233,.08));
}

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }
.cta-inner .card, .cta-inner [class*="card"] {
    border-radius: var(--radius-xl);
    border: 3px solid rgba(34,197,94,.42);
    background:
        radial-gradient(100% 120% at 50% 0%, rgba(34,197,94,.20), rgba(34,197,94,.00) 60%),
        linear-gradient(135deg, rgba(14,165,233,.16), rgba(255,255,255,.70));
    box-shadow: 4px 4px 0px rgba(34,197,94,.22), 14px 14px 38px rgba(11,18,32,.14);
}

/* 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: translate(4px, -4px); box-shadow: var(--shadow-lg); border-color: rgba(34,197,94,.55); }
header, .header, .navbar { background: transparent; border-bottom: 2px solid rgba(3, 105, 161, .18); }

/* 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: 0.12s cubic-bezier(.2,.9,.2,1); }
    .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; }
}