:root {
    --pr-primary: #2563eb;
    --pr-primary-dark: #1e40af;
    --pr-ink: #0f172a;
    --pr-text: #1f2937;
    --pr-muted: #4b5563;
    --pr-soft-bg: #f5f7fa;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--pr-text);
    background: #f9fafb;
    letter-spacing: 0.01em;
}

.pr-page-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.96);
    backdrop-filter: blur(8px);
    box-shadow: 0 2px 12px rgba(15, 23, 42, 0.12);
}

.pr-page-header .navbar {
    padding: 0.75rem 0;
}

.pr-page-header .nav-link {
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
}

.pr-page-header .nav-link.active,
.pr-page-header .nav-link:hover {
    color: #ffffff;
}

.pr-hero {
    padding: 140px 0 64px;
    background: linear-gradient(180deg, #0f172a 0%, #172554 100%);
    color: #ffffff;
    border-bottom: 1px solid rgba(148, 163, 184, 0.24);
}

.pr-hero-content {
    max-width: 760px;
}

.pr-hero-kicker {
    font-size: 0.8rem;
    letter-spacing: 0.12em;
    color: rgba(255, 255, 255, 0.6);
    font-weight: 700;
    margin-bottom: 10px;
}

.pr-hero-title {
    font-size: 2.6rem;
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: 0.02em;
}

.pr-hero-subtitle {
    font-size: 1.06rem;
    color: rgba(255, 255, 255, 0.78);
    margin: 0;
    max-width: 720px;
    line-height: 1.9;
}

.pr-breadcrumb-wrap {
    border-bottom: 1px solid #e2e8f0;
    background: #f8fafc;
    padding: 14px 0;
}

.pr-breadcrumb-wrap .breadcrumb-item a {
    color: var(--pr-primary);
    text-decoration: none;
    font-size: 0.86rem;
}

.pr-breadcrumb-wrap .breadcrumb-item.active {
    font-size: 0.86rem;
    font-weight: 500;
}

.pr-main {
    padding: 42px 0 72px;
    background: #ffffff;
}

.pr-tabs-panel {
    position: sticky;
    top: 96px;
    background: transparent;
}

.pr-tabs-title-wrap {
    padding: 6px 0 12px;
    border-bottom: 1px solid #d1d5db;
}

.pr-tabs-kicker {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-size: 0.78rem;
    color: #1d4ed8;
    font-weight: 700;
    letter-spacing: 0.08em;
    margin-bottom: 8px;
}

.pr-tabs-title-wrap h2 {
    font-size: 1.2rem;
    margin: 0;
    color: var(--pr-ink);
    font-weight: 800;
}

.pr-tabs-list {
    max-height: 72vh;
    overflow: auto;
    padding-top: 4px;
}

.pr-tabs-list::-webkit-scrollbar {
    width: 8px;
}

.pr-tabs-list::-webkit-scrollbar-thumb {
    background: #bfdbfe;
    border-radius: 999px;
}

.pr-tab-btn {
    width: 100%;
    border: 0;
    border-bottom: 1px solid #e5e7eb;
    background: transparent;
    display: flex;
    align-items: center;
    gap: 10px;
    text-align: left;
    padding: 13px 4px 13px 12px;
    color: #374151;
    transition: color 0.2s ease, padding-left 0.2s ease;
    position: relative;
}

.pr-tab-btn:last-child {
    border-bottom: 0;
}

.pr-tab-num {
    color: #1d4ed8;
    font-weight: 700;
    min-width: 28px;
    font-size: 0.86rem;
}

.pr-tab-text {
    flex: 1;
    font-size: 0.92rem;
    line-height: 1.5;
}

.pr-tab-btn i {
    color: #9ca3af;
    transition: color 0.2s ease;
}

.pr-tab-btn:hover {
    color: #111827;
}

.pr-tab-btn:hover i {
    color: #6b7280;
}

.pr-tab-btn.active {
    color: #0f172a;
    padding-left: 16px;
    font-weight: 600;
}

.pr-tab-btn.active::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 3px;
    height: 60%;
    background: var(--pr-primary);
    transform: translateY(-50%);
}

.pr-tab-btn.active i {
    color: #1d4ed8;
}

.pr-content-panel {
    background: transparent;
    padding: 4px 0 0 30px;
    border-left: 1px solid #d1d5db;
    min-height: 680px;
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.22s ease, transform 0.22s ease;
}

.pr-content-panel.is-hiding {
    opacity: 0;
    transform: translateY(8px);
}

.pr-content-panel.is-entering {
    opacity: 0;
    transform: translateY(12px);
    transition: none;
}

.pr-content-panel.is-ready {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.35s ease, transform 0.35s ease;
}

.pr-content-banner {
    width: 100%;
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 28px;
    aspect-ratio: 2 / 1;
    background: #f1f5f9;
}

.pr-content-banner img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.pr-content-top {
    margin-bottom: 20px;
}

.pr-content-tag {
    display: inline-flex;
    align-items: center;
    border-radius: 0;
    background: transparent;
    color: #1d4ed8;
    font-size: 0.78rem;
    font-weight: 700;
    padding: 0;
    border-bottom: 1px solid #bfdbfe;
    margin-bottom: 10px;
}

.pr-content-title {
    color: var(--pr-ink);
    font-size: 2.1rem;
    line-height: 1.4;
    font-weight: 800;
    margin-bottom: 0;
}

.pr-highlight-card {
    margin-bottom: 18px;
    border-left: 2px solid #93c5fd;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 2px 0 2px 12px;
}

.pr-highlight-card i {
    color: #f59e0b;
    font-size: 1.05rem;
    margin-top: 3px;
}

.pr-highlight-card p {
    margin: 0;
    color: #374151;
    line-height: 1.9;
}

.pr-rich-text {
    margin: 8px 0 14px;
}

.pr-rich-text p {
    margin: 0 0 12px;
    color: #1f2937;
    line-height: 2;
    font-size: 1rem;
}

.pr-rich-text p:last-child {
    margin-bottom: 0;
}

.pr-service-scope {
    margin-top: 14px;
    border-top: 1px solid #d1d5db;
    padding-top: 14px;
}

.pr-scope-title {
    margin: 0;
    color: #1d4ed8;
    font-size: 1.85rem;
    font-weight: 500;
    line-height: 1.25;
    padding: 12px 18px;
    background: linear-gradient(90deg, rgba(219, 234, 254, 0.72), rgba(255, 255, 255, 0));
}

.pr-scope-columns {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px;
    padding: 18px 8px 4px;
}

.pr-scope-columns ul {
    margin: 0;
    padding: 0 0 0 18px;
    list-style: none;
}

.pr-scope-columns li {
    position: relative;
    margin-bottom: 14px;
    color: #374151;
    line-height: 1.72;
}

.pr-scope-columns li::before {
    content: "";
    position: absolute;
    left: -13px;
    top: 0.75em;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #2563eb;
}

.pr-scope-columns li:last-child {
    margin-bottom: 0;
}

.pr-footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 24px 0 30px;
}

.pr-footer-link {
    color: #cbd5e1;
    text-decoration: none;
    margin-left: 18px;
}

.pr-footer-link:hover {
    color: #ffffff;
}

@media (max-width: 1199px) {
    .pr-content-title {
        font-size: 1.82rem;
    }
}

@media (max-width: 991px) {
    .pr-hero {
        padding: 120px 0 48px;
    }

    .pr-hero-title {
        font-size: 2.3rem;
    }

    .pr-tabs-panel {
        position: static;
    }

    .pr-content-panel {
        min-height: auto;
        padding: 18px 0 0;
        border-left: 0;
    }

    .pr-page-header .navbar-nav {
        margin-top: 8px;
    }
}

@media (max-width: 576px) {
    .pr-main {
        padding: 36px 0 52px;
    }

    .pr-hero-title {
        font-size: 1.95rem;
    }

    .pr-content-title {
        font-size: 1.55rem;
    }

    .pr-tab-btn {
        padding: 12px 2px 12px 8px;
    }

    .pr-scope-title {
        font-size: 1.42rem;
        padding: 10px 12px;
    }

    .pr-scope-columns {
        grid-template-columns: 1fr;
        gap: 12px;
        padding: 14px 0 4px;
    }

    .pr-footer-link {
        margin-left: 12px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .pr-content-panel,
    .pr-content-panel.is-hiding,
    .pr-content-panel.is-entering,
    .pr-content-panel.is-ready,
    .pr-tab-btn,
    .pr-tab-btn i {
        animation: none !important;
        transition: none !important;
    }
}