:root {
    --color-primary: #1d4ed8;
    --color-primary-dark: #1e3a8a;
    --color-accent: #f97316;
    --color-surface: #0b1220;
    --color-text: #e5e7eb;
    --rgb-primary: 29,78,216;
    --rgb-accent: 249,115,22;

    --radius-sm: 0px;
    --radius-md: 2px;
    --radius-lg: 3px;
    --radius-xl: 4px;

    --shadow-sm: 4px 4px 0 rgba(29,78,216,.22);
    --shadow-md: 4px 4px 0 rgba(0,0,0,.55), 0 0 0 2px rgba(29,78,216,.22);
    --shadow-lg: 6px 6px 0 rgba(0,0,0,.62), 0 0 0 3px rgba(249,115,22,.22), 0 14px 30px rgba(0,0,0,.18);

    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;

    --transition: 0.15s cubic-bezier(0.2, 0.9, 0.2, 1);
    --heading-weight: 650;
    --body-line-height: 1.6;
}

body { color: var(--color-text); line-height: var(--body-line-height); }
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-xl);
    box-shadow:
        4px 4px 0 rgba(0,0,0,.72),
        -2px -2px 0 rgba(29,78,216,.22),
        0 16px 40px rgba(0,0,0,.16);
    padding: var(--space-card);
    transition: var(--transition);
    background:
        linear-gradient(135deg, rgba(29,78,216,.18), rgba(249,115,22,.08) 55%, rgba(0,0,0,.15)),
        radial-gradient(1200px 400px at 10% 0%, rgba(29,78,216,.18), transparent 50%),
        radial-gradient(900px 360px at 90% 20%, rgba(249,115,22,.18), transparent 45%),
        rgba(15,23,42,.72);
    border: 3px solid rgba(229,231,235,.18);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    border: 2px solid rgba(229,231,235,.22);
    box-shadow: 3px 3px 0 rgba(0,0,0,.65);
    background: linear-gradient(180deg, rgba(29,78,216,.95), rgba(30,58,138,.92));
    color: #fff;
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-shadow: 0 1px 0 rgba(0,0,0,.35); }

:root {
    --hero-grad-a: #0ea5e9;
    --hero-grad-b: #22c55e;
    --hero-grad-c: #f97316;
    --news-grad-a: #60a5fa;
    --news-grad-b: #a78bfa;
    --feat-grad-a: #fb7185;
    --feat-grad-b: #f97316;
    --test-grad-a: #22c55e;
    --test-grad-b: #3b82f6;
    --part-grad-a: #38bdf8;
    --part-grad-b: #f59e0b;
    --faq-grad-a: #a78bfa;
    --faq-grad-b: #fb7185;
    --stats-grad-a: #22c55e;
    --stats-grad-b: #f97316;
    --cta-grad-a: #1d4ed8;
    --cta-grad-b: #f97316;
}

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

                .news-grid { column-count: 2; column-gap: var(--space-gap); }
                .news-grid .card {
                    break-inside: avoid;
                    margin-bottom: var(--space-gap);
                    background:
                        linear-gradient(90deg, rgba(96,165,250,.22), rgba(167,139,250,.18) 50%, rgba(0,0,0,.10)),
                        radial-gradient(600px 260px at 0% 0%, rgba(96,165,250,.22), transparent 52%),
                        rgba(15,23,42,.78);
                    border-color: rgba(96,165,250,.35);
                    box-shadow:
                        4px 4px 0 rgba(0,0,0,.78),
                        -1px -1px 0 rgba(167,139,250,.22),
                        0 18px 44px rgba(0,0,0,.18);
                    transition: var(--transition);
                }

                .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 > * .card,
                .feature-list > *[class*="card"]{
                    background:
                        linear-gradient(135deg, rgba(251,113,133,.20), rgba(249,115,22,.16) 60%, rgba(0,0,0,.12)),
                        radial-gradient(700px 260px at 15% 0%, rgba(251,113,133,.22), transparent 55%),
                        rgba(15,23,42,.78);
                    border-color: rgba(249,115,22,.38);
                    box-shadow:
                        5px 5px 0 rgba(0,0,0,.76),
                        -2px -2px 0 rgba(251,113,133,.20),
                        0 20px 50px rgba(0,0,0,.16);
                    border-radius: 2px;
                }

.hero-content { text-align: center; max-width: 800px; margin: 0 auto; }
.testimonial-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
.testimonial-list .card, .testimonial-list [class*="card"]{
    background:
        linear-gradient(120deg, rgba(34,197,94,.18), rgba(59,130,246,.18) 55%, rgba(0,0,0,.12)),
        radial-gradient(700px 260px at 90% 10%, rgba(59,130,246,.24), transparent 55%),
        rgba(15,23,42,.78);
    border-color: rgba(34,197,94,.35);
    box-shadow:
        4px 4px 0 rgba(0,0,0,.80),
        -2px -2px 0 rgba(59,130,246,.18),
        0 16px 40px rgba(0,0,0,.16);
}

.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }
.partner-grid .card, .partner-grid [class*="card"]{
    background:
        linear-gradient(135deg, rgba(56,189,248,.18), rgba(245,158,11,.16) 60%, rgba(0,0,0,.12)),
        radial-gradient(820px 300px at 10% 0%, rgba(56,189,248,.22), transparent 52%),
        rgba(15,23,42,.78);
    border-color: rgba(245,158,11,.34);
    box-shadow:
        6px 6px 0 rgba(0,0,0,.78),
        -2px -2px 0 rgba(56,189,248,.18),
        0 20px 56px rgba(0,0,0,.16);
}

                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }
                .faq-wrapper .card, .faq-wrapper [class*="card"]{
                    background:
                        linear-gradient(135deg, rgba(167,139,250,.22), rgba(251,113,133,.16) 60%, rgba(0,0,0,.12)),
                        radial-gradient(740px 260px at 0% 0%, rgba(167,139,250,.24), transparent 52%),
                        rgba(15,23,42,.78);
                    border-color: rgba(167,139,250,.38);
                    box-shadow:
                        4px 4px 0 rgba(0,0,0,.80),
                        -2px -2px 0 rgba(251,113,133,.18),
                        0 18px 48px rgba(0,0,0,.16);
                }

.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }
.stats-grid .card, .stats-grid [class*="card"]{
    background:
        linear-gradient(135deg, rgba(34,197,94,.18), rgba(249,115,22,.16) 58%, rgba(0,0,0,.12)),
        radial-gradient(780px 280px at 85% 0%, rgba(249,115,22,.20), transparent 55%),
        rgba(15,23,42,.78);
    border-color: rgba(249,115,22,.34);
    box-shadow:
        5px 5px 0 rgba(0,0,0,.80),
        -2px -2px 0 rgba(34,197,94,.18),
        0 18px 46px rgba(0,0,0,.16);
}

.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }
.cta-inner .card, .cta-inner [class*="card"]{
    background:
        linear-gradient(135deg, rgba(29,78,216,.25), rgba(249,115,22,.18) 58%, rgba(0,0,0,.12)),
        radial-gradient(820px 320px at 10% 0%, rgba(29,78,216,.28), transparent 52%),
        rgba(15,23,42,.78);
    border-color: rgba(29,78,216,.34);
    box-shadow:
        6px 6px 0 rgba(0,0,0,.82),
        -2px -2px 0 rgba(249,115,22,.18),
        0 24px 70px rgba(0,0,0,.16);
}

/* 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(-4px);
    box-shadow:
        7px 7px 0 rgba(0,0,0,.82),
        -2px -2px 0 rgba(29,78,216,.22),
        0 26px 72px rgba(0,0,0,.22);
    border-color: rgba(229,231,235,.35);
}
.card { border-left: 3px solid var(--color-primary); }
header, .header, .navbar {
    box-shadow:
        4px 4px 0 rgba(0,0,0,.62),
        0 18px 48px rgba(0,0,0,.18);
    border-bottom: 2px solid rgba(229,231,235,.14);
}

/* 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; }
}