:root {
    --bg: #f6f8fc;
    --panel: #ffffff;
    --text: #142033;
    --muted: #667085;
    --line: #e7edf5;
    --brand: #2869ff;
    --soft: #edf3ff;
}
body.dark {
    --bg: #101624;
    --panel: #172033;
    --text: #eef4ff;
    --muted: #aab6cb;
    --line: #2a354a;
    --brand: #6b93ff;
    --soft: #1f2b43;
}
html,
body {
    margin: 0;
    padding: 0;
    min-height: 100%;
}
body {
    background: var(--bg);
    color: var(--text);
    font-family: "Microsoft YaHei", Arial, sans-serif;
    padding-top: 68px;
}
.site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, .92);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(12px);
    width: 100%;
}
body.dark .site-nav {
    background: rgba(16, 22, 36, .92);
}
.site-nav .nav-inner {
    max-width: 1360px;
    margin: 0 auto;
    min-height: 68px;
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 0 28px;
}
.brand {
    color: var(--text);
    font-size: 18px;
    font-weight: 700;
    white-space: nowrap;
}
.brand i {
    color: var(--brand);
    margin-right: 8px;
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 18px;
    flex: 1;
}
.nav-links a,
.nav-actions a,
.nav-actions button {
    color: var(--muted);
    background: transparent;
    border: 0;
    line-height: 32px;
    padding: 0;
    text-decoration: none;
}
.nav-links a.active,
.nav-links a:hover,
.nav-actions a:hover,
.nav-actions button:hover {
    color: var(--brand);
}
.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    white-space: nowrap;
}
.nav-actions a.btn-main {
    color: #fff !important;
    background: var(--brand);
    line-height: 38px;
    padding: 0 16px;
}
.nav-actions a.btn-main:hover {
    color: #fff !important;
    background: #1f58dd;
}
.btn-main,
.btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    border-radius: 6px;
    padding: 0 16px;
    text-decoration: none;
}
.btn-main {
    color: #fff !important;
    background: var(--brand);
}
.btn-ghost {
    color: var(--brand) !important;
    border: 1px solid var(--line);
    background: var(--panel);
}
.hero,
.section,
.page-hero {
    max-width: 1360px;
    margin: 0 auto;
    padding-left: 28px;
    padding-right: 28px;
}
.hero {
    padding-top: 44px;
    padding-bottom: 36px;
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr);
    gap: 44px;
    align-items: center;
}
.hero h1,
.page-hero h1 {
    font-size: 46px;
    line-height: 1.18;
    margin: 0 0 18px;
    font-weight: 800;
    letter-spacing: 0;
}
.hero p,
.page-hero p {
    color: var(--muted);
    font-size: 16px;
    line-height: 1.9;
    margin: 0 0 26px;
}
.hero-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}
.hero-panel,
.feature,
.plan,
.case-item {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
}
.hero-panel {
    padding: 22px;
    box-shadow: 0 18px 45px rgba(31, 49, 86, .08);
}
.quote-preview {
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
}
.quote-preview .head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 16px;
    border-bottom: 1px solid var(--line);
    background: var(--soft);
}
.quote-preview .rows {
    padding: 14px 16px;
}
.quote-row {
    display: grid;
    grid-template-columns: 1fr 80px 90px;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--line);
    color: var(--muted);
}
.quote-row:last-child {
    border-bottom: 0;
}
.quote-total {
    display: flex;
    justify-content: space-between;
    padding: 16px;
    color: var(--text);
    font-size: 18px;
    font-weight: 700;
    background: var(--panel);
}
.section {
    padding-top: 34px;
    padding-bottom: 34px;
}
.page-hero {
    padding-top: 52px;
    padding-bottom: 22px;
}
.rich-page-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 32px;
    align-items: center;
}
.eyebrow {
    display: inline-flex;
    align-items: center;
    min-height: 28px;
    border-radius: 999px;
    padding: 0 12px;
    color: var(--brand);
    background: var(--soft);
    margin-bottom: 14px;
}
.hero-stat-panel {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 18px;
}
.hero-stat {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--line);
    padding: 14px 0;
    color: var(--muted);
}
.hero-stat:first-child {
    padding-top: 0;
}
.hero-stat:last-child {
    border-bottom: 0;
    padding-bottom: 0;
}
.hero-stat strong {
    color: var(--text);
    font-size: 22px;
}
.section-title {
    margin-bottom: 22px;
}
.section-title h2 {
    margin: 0 0 8px;
    font-size: 28px;
    font-weight: 700;
}
.section-title p {
    margin: 0;
    color: var(--muted);
}
.feature-grid,
.plan-grid,
.case-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}
.feature,
.plan,
.case-item {
    padding: 20px;
}
.feature i,
.case-item i {
    color: var(--brand);
    font-size: 24px;
    margin-bottom: 12px;
}
.feature h3,
.plan h3,
.case-item h3 {
    margin: 0 0 10px;
    font-size: 18px;
    font-weight: 700;
}
.feature p,
.plan p,
.case-item p {
    margin: 0;
    color: var(--muted);
    line-height: 1.8;
}
.plan .price {
    margin: 16px 0;
    color: var(--brand);
    font-size: 30px;
    font-weight: 800;
}
.step-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}
.step-card,
.faq-item,
.cta-panel {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
}
.step-card {
    padding: 20px;
}
.step-card span {
    display: inline-flex;
    width: 34px;
    height: 34px;
    align-items: center;
    justify-content: center;
    color: #fff;
    background: var(--brand);
    border-radius: 50%;
    margin-bottom: 14px;
}
.step-card h3,
.faq-item h3 {
    margin: 0 0 10px;
    font-size: 17px;
    font-weight: 700;
}
.step-card p,
.faq-item p,
.cta-panel p {
    margin: 0;
    color: var(--muted);
    line-height: 1.8;
}
.faq-list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}
.faq-item {
    padding: 20px;
}
.cta-panel {
    padding: 26px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 18px;
}
.cta-panel h2 {
    margin: 0 0 8px;
    font-size: 24px;
}
.site-footer {
    border-top: 1px solid var(--line);
    color: var(--muted);
    padding: 24px 18px;
    text-align: center;
}
@media (max-width: 991px) {
    .site-nav .nav-inner,
    .nav-links,
    .nav-actions {
        flex-wrap: wrap;
    }
    .site-nav .nav-inner {
        padding: 14px 18px;
    }
    body {
        padding-top: 96px;
    }
    .hero {
        grid-template-columns: 1fr;
        padding-top: 42px;
    }
            .feature-grid,
            .plan-grid,
            .case-grid,
            .step-grid,
            .faq-list {
                grid-template-columns: 1fr;
            }
            .rich-page-hero,
            .cta-panel {
                grid-template-columns: 1fr;
                display: grid;
            }
        }