/* roulang page: index */
:root {
            --primary: #0B6FA4;
            --primary-dark: #084F75;
            --primary-light: #E6F2F9;
            --lake: #12A5A0;
            --accent: #F59E0B;
            --surface: #F7FAFC;
            --ink: #1E2B38;
            --sub: #5A6B7B;
            --line: #E4EBF0;
            --radius: 12px;
            --shadow: 0 4px 16px rgba(11, 111, 164, 0.08);
        }
        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            color: var(--ink);
            background: var(--surface);
            line-height: 1.75;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        button {
            cursor: pointer;
        }
        .no-scrollbar::-webkit-scrollbar {
            display: none;
        }
        .no-scrollbar {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
        }
        .faq-item[data-open="true"] .faq-answer {
            max-height: 360px;
        }
        .faq-item[data-open="true"] .faq-icon {
            transform: rotate(45deg);
            border-color: var(--primary);
            color: var(--primary);
        }
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 4px;
        }
        .card-hover {
            transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(11, 111, 164, 0.14);
            border-color: rgba(11, 111, 164, 0.18);
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-radius: 999px;
            font-weight: 600;
            transition: background 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
        }
        .btn-primary:active {
            background: #062f47;
            transform: scale(0.98);
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            border-radius: 999px;
            font-weight: 600;
            transition: background 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
        }
        .btn-accent:hover {
            background: var(--accent-dark, #D97706);
        }
        .btn-accent:active {
            transform: scale(0.98);
        }
        .btn-ghost {
            background: #fff;
            color: var(--primary);
            border: 1.5px solid rgba(11, 111, 164, 0.25);
            border-radius: 999px;
            font-weight: 600;
            transition: background 0.15s ease, border-color 0.15s ease;
        }
        .btn-ghost:hover {
            background: var(--primary-light);
            border-color: rgba(11, 111, 164, 0.4);
        }
        .section-pad {
            padding: 80px 0;
        }
        .badge-dot {
            width: 6px;
            height: 6px;
            border-radius: 999px;
            display: inline-block;
        }
        .news-card {
            transition: box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
        }
        .news-card:hover {
            box-shadow: 0 8px 20px rgba(11, 111, 164, 0.08);
            border-color: rgba(11, 111, 164, 0.22);
            background: #fff;
        }
        .timeline-num {
            font-variant-numeric: tabular-nums;
        }
        @media (max-width: 767px) {
            .section-pad {
                padding: 56px 0;
            }
            .hero-title {
                font-size: 30px !important;
                line-height: 1.25 !important;
            }
        }
        .grid-card-img {
            aspect-ratio: 4 / 3;
            object-fit: cover;
            width: 100%;
        }
        .grid-card-img-fallback {
            aspect-ratio: 4 / 3;
            background: linear-gradient(135deg, #e6f2f9, #d3e7f3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            font-weight: 700;
            color: rgba(11, 111, 164, 0.55);
        }

/* roulang page: category1 */
:root {
            --primary: #0B6FA4;
            --primary-deep: #084F75;
            --primary-light: #E6F2F9;
            --lake: #12A5A0;
            --accent: #F59E0B;
            --surface: #F7FAFC;
            --ink: #1E2B38;
            --sub: #5A6B7B;
            --line: #E4EBF0;
            --shadow: 0 4px 16px rgba(11, 111, 164, 0.08);
            --shadow-hover: 0 8px 24px rgba(11, 111, 164, 0.14);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background-color: var(--surface);
            color: var(--ink);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        .container-main {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 16px;
            padding-right: 16px;
        }

        @media (min-width: 768px) {
            .container-main {
                padding-left: 24px;
                padding-right: 24px;
            }
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background-color: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--line);
            transition: box-shadow 0.2s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 16px rgba(11, 111, 164, 0.06);
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }

        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--ink);
            letter-spacing: -0.01em;
        }

        .logo-text .highlight {
            color: var(--primary);
        }

        .nav-desktop {
            display: none;
            align-items: center;
            gap: 4px;
            padding: 6px;
            background-color: var(--surface);
            border-radius: 999px;
            border: 1px solid rgba(228, 235, 240, 0.6);
        }

        @media (min-width: 1024px) {
            .nav-desktop {
                display: flex;
            }
        }

        .nav-desktop a {
            padding: 8px 20px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            color: var(--sub);
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .nav-desktop a:hover {
            color: var(--primary);
            background-color: rgba(255, 255, 255, 0.7);
        }

        .nav-desktop a.active {
            background-color: #fff;
            color: var(--primary);
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(11, 111, 164, 0.1);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 24px;
            border-radius: 999px;
            transition: background-color 0.15s ease;
            white-space: nowrap;
        }

        .btn-primary:hover {
            background-color: var(--primary-deep);
        }

        .btn-primary:active {
            background-color: #063a57;
        }

        .btn-primary:focus-visible {
            outline: 3px solid rgba(11, 111, 164, 0.4);
            outline-offset: 2px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: #fff;
            color: var(--primary);
            border: 1px solid var(--primary);
            font-size: 14px;
            font-weight: 600;
            padding: 10px 24px;
            border-radius: 999px;
            transition: all 0.15s ease;
            white-space: nowrap;
        }

        .btn-outline:hover {
            background-color: var(--primary-light);
        }

        .btn-outline:focus-visible {
            outline: 3px solid rgba(11, 111, 164, 0.4);
            outline-offset: 2px;
        }

        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--accent);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 12px 32px;
            border-radius: 999px;
            transition: background-color 0.15s ease;
            white-space: nowrap;
        }

        .btn-accent:hover {
            background-color: #d97706;
        }

        .btn-accent:focus-visible {
            outline: 3px solid rgba(245, 158, 11, 0.4);
            outline-offset: 2px;
        }

        .nav-mobile-tabs {
            display: flex;
            gap: 8px;
            overflow-x: auto;
            padding-bottom: 12px;
            padding-top: 4px;
            scrollbar-width: none;
        }

        .nav-mobile-tabs::-webkit-scrollbar {
            display: none;
        }

        .nav-mobile-tabs a {
            flex-shrink: 0;
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            color: var(--sub);
            background-color: var(--surface);
            border: 1px solid rgba(228, 235, 240, 0.8);
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .nav-mobile-tabs a.active {
            background-color: #fff;
            color: var(--primary);
            font-weight: 600;
            border-color: var(--primary);
        }

        @media (min-width: 1024px) {
            .nav-mobile-tabs {
                display: none;
            }
        }

        /* ===== Page Hero ===== */
        .page-hero {
            position: relative;
            background: linear-gradient(135deg, #F0F7FC 0%, #E6F2F9 60%, #D9EBF5 100%);
            padding: 72px 0 64px;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 480px;
            height: 480px;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            pointer-events: none;
            border-radius: 0 0 0 48px;
        }

        .page-hero .container-main {
            position: relative;
            z-index: 1;
        }

        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--sub);
            margin-bottom: 24px;
        }

        .breadcrumb a {
            transition: color 0.2s ease;
        }

        .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb .sep {
            color: #B0C4D0;
        }

        .breadcrumb .current {
            color: var(--primary);
            font-weight: 500;
        }

        .page-hero h1 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.2;
            color: var(--ink);
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }

        .page-hero .lead {
            font-size: 16px;
            color: var(--sub);
            max-width: 680px;
            line-height: 1.75;
            margin-bottom: 24px;
        }

        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 16px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background-color: rgba(255, 255, 255, 0.8);
            border: 1px solid rgba(228, 235, 240, 0.9);
            border-radius: 999px;
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
            box-shadow: 0 2px 8px rgba(11, 111, 164, 0.06);
        }

        .hero-badge .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background-color: var(--lake);
        }

        @media (min-width: 768px) {
            .page-hero h1 {
                font-size: 40px;
            }
            .page-hero .lead {
                font-size: 17px;
            }
        }

        /* ===== Section ===== */
        .section-block {
            padding: 56px 0;
        }

        .section-block-alt {
            background-color: #fff;
            border-top: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
        }

        .section-head {
            margin-bottom: 40px;
        }

        .section-head h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--ink);
            letter-spacing: -0.01em;
            line-height: 1.3;
            margin-bottom: 10px;
        }

        .section-head p {
            font-size: 15px;
            color: var(--sub);
            max-width: 640px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            background-color: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 14px;
        }

        @media (min-width: 768px) {
            .section-block {
                padding: 72px 0;
            }
            .section-head h2 {
                font-size: 28px;
            }
        }

        /* ===== Cards ===== */
        .card {
            background-color: #fff;
            border-radius: 12px;
            box-shadow: var(--shadow);
            border: 1px solid rgba(228, 235, 240, 0.6);
            padding: 24px;
            transition: box-shadow 0.25s ease, transform 0.25s ease;
            height: 100%;
        }

        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background-color: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            color: var(--primary);
        }

        .card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .card p {
            font-size: 14px;
            color: var(--sub);
            line-height: 1.7;
        }

        .step-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
            counter-reset: step-counter;
        }

        @media (min-width: 768px) {
            .step-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (min-width: 1024px) {
            .step-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }

        .step-card {
            background-color: #fff;
            border-radius: 12px;
            box-shadow: var(--shadow);
            border: 1px solid rgba(228, 235, 240, 0.6);
            padding: 28px 24px 24px;
            position: relative;
            transition: box-shadow 0.25s ease, transform 0.25s ease;
        }

        .step-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background-color: var(--primary);
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .step-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 14px;
            color: var(--sub);
            line-height: 1.7;
        }

        /* ===== Image Cards ===== */
        .img-card-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }

        @media (min-width: 768px) {
            .img-card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (min-width: 1024px) {
            .img-card-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        .img-card {
            background-color: #fff;
            border-radius: 12px;
            box-shadow: var(--shadow);
            border: 1px solid rgba(228, 235, 240, 0.6);
            overflow: hidden;
            transition: box-shadow 0.25s ease, transform 0.25s ease;
            height: 100%;
        }

        .img-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .img-card .img-wrap {
            aspect-ratio: 4 / 3;
            overflow: hidden;
            background-color: var(--primary-light);
            position: relative;
        }

        .img-card .img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .img-card:hover .img-wrap img {
            transform: scale(1.03);
        }

        .img-card .card-body {
            padding: 20px;
        }

        .img-card .tag {
            display: inline-block;
            background-color: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: 999px;
            margin-bottom: 10px;
        }

        .img-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--ink);
            line-height: 1.5;
            margin-bottom: 8px;
        }

        .img-card p {
            font-size: 14px;
            color: var(--sub);
            line-height: 1.7;
        }

        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            margin-top: 12px;
            transition: gap 0.2s ease;
        }

        .card-link:hover {
            gap: 8px;
        }

        /* ===== Checklist ===== */
        .check-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 12px;
        }

        @media (min-width: 768px) {
            .check-list {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        .check-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            background-color: #fff;
            border-radius: 12px;
            padding: 18px 20px;
            border: 1px solid rgba(228, 235, 240, 0.8);
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .check-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow);
        }

        .check-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background-color: rgba(18, 165, 160, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--lake);
        }

        .check-item .text-group {
            flex: 1;
        }

        .check-item .text-group strong {
            display: block;
            font-size: 15px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 2px;
        }

        .check-item .text-group span {
            font-size: 14px;
            color: var(--sub);
            line-height: 1.6;
        }

        /* ===== Dark Panel ===== */
        .dark-panel {
            background-color: #1E2B38;
            border-radius: 16px;
            padding: 32px 28px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .dark-panel::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 200px;
            height: 200px;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            opacity: 0.08;
            border-radius: 50%;
        }

        .dark-panel h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .dark-panel p {
            font-size: 15px;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 20px;
        }

        .stat-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-top: 24px;
        }

        .stat-item {
            text-align: center;
            padding: 16px 8px;
            background-color: rgba(255, 255, 255, 0.06);
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .stat-item .num {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            line-height: 1.2;
        }

        .stat-item .label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 4px;
        }

        @media (min-width: 768px) {
            .dark-panel {
                padding: 48px 40px;
            }
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background-color: #fff;
            border-radius: 12px;
            border: 1px solid rgba(228, 235, 240, 0.8);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .faq-item:hover {
            border-color: rgba(11, 111, 164, 0.3);
        }

        .faq-item.active {
            border-color: var(--primary);
            box-shadow: var(--shadow);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--ink);
            text-align: left;
            transition: color 0.2s ease;
            gap: 16px;
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-question:focus-visible {
            outline: 3px solid rgba(11, 111, 164, 0.3);
            outline-offset: -2px;
        }

        .faq-toggle {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background-color: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            transition: transform 0.3s ease, background-color 0.2s ease;
        }

        .faq-item.active .faq-toggle {
            transform: rotate(45deg);
            background-color: var(--primary);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-answer-inner {
            padding: 0 20px 20px;
            font-size: 14px;
            color: var(--sub);
            line-height: 1.75;
            border-top: 1px solid var(--line);
            padding-top: 16px;
            margin-top: 2px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background-color: var(--primary);
            border-radius: 16px;
            padding: 48px 32px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.06;
        }

        .cta-section .cta-inner {
            position: relative;
            z-index: 1;
        }

        .cta-section h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .cta-section p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 28px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-btn-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }

        @media (min-width: 768px) {
            .cta-section {
                padding: 64px 48px;
            }
            .cta-section h2 {
                font-size: 30px;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background-color: #fff;
            border-top: 1px solid rgba(228, 235, 240, 0.6);
            margin-top: 56px;
        }

        .badge-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
        }

        .bg-lake {
            background-color: var(--lake);
        }

        /* scrollbar hidden */
        .scrollbar-hide::-webkit-scrollbar {
            display: none;
        }

        .scrollbar-hide {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }

        /* focus visible general */
        a:focus-visible {
            outline: 3px solid rgba(11, 111, 164, 0.4);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* responsive spacing */
        @media (max-width: 520px) {
            .page-hero {
                padding: 48px 0 48px;
            }
            .section-block {
                padding: 44px 0;
            }
            .page-hero h1 {
                font-size: 28px;
            }
            .hero-badges {
                gap: 8px;
            }
            .hero-badge {
                padding: 4px 12px;
                font-size: 12px;
            }
        }

/* roulang page: article */
/* ===== 基础 reset ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: #F7FAFC;
  color: #1E2B38;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; }
::selection { background: rgba(11,111,164,0.15); color: #084F75; }

/* ===== 导航 ===== */
.nav-wrap {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(228,235,240,0.8);
  transition: box-shadow 0.3s ease;
}
.nav-wrap.scrolled {
  box-shadow: 0 4px 20px rgba(11,111,164,0.08);
}
.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 面包屑 ===== */
.breadcrumb-item {
  font-size: 13px;
  color: #5A6B7B;
  transition: color 0.2s;
}
.breadcrumb-item:hover { color: #0B6FA4; }
.breadcrumb-sep { color: #C8D6E0; margin: 0 8px; font-size: 13px; }

/* ===== 文章排版 ===== */
.article-body {
  font-size: 16px;
  line-height: 1.9;
  color: #1E2B38;
}
.article-body h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 36px 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid #E4EBF0;
  color: #1E2B38;
  line-height: 1.4;
}
.article-body h3 {
  font-size: 19px;
  font-weight: 600;
  margin: 28px 0 12px;
  color: #1E2B38;
  line-height: 1.5;
}
.article-body h4 {
  font-size: 16px;
  font-weight: 600;
  margin: 20px 0 10px;
  color: #084F75;
}
.article-body p {
  margin-bottom: 20px;
}
.article-body img {
  border-radius: 12px;
  margin: 28px auto;
  box-shadow: 0 4px 16px rgba(11,111,164,0.1);
  max-width: 100%;
}
.article-body img + em,
.article-body .img-caption {
  display: block;
  text-align: center;
  font-size: 13px;
  color: #5A6B7B;
  margin-top: -16px;
  margin-bottom: 24px;
  font-style: normal;
}
.article-body blockquote {
  background: #E6F2F9;
  border-left: 4px solid #0B6FA4;
  padding: 18px 22px;
  border-radius: 0 12px 12px 0;
  margin: 24px 0;
  color: #084F75;
  font-size: 15px;
}
.article-body ul,
.article-body ol {
  margin: 0 0 22px 22px;
}
.article-body li {
  margin-bottom: 8px;
}
.article-body ul li {
  position: relative;
  padding-left: 6px;
}
.article-body ul li::before {
  content: '';
  position: absolute;
  left: -16px;
  top: 12px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #0B6FA4;
}
.article-body a {
  color: #0B6FA4;
  font-weight: 500;
  border-bottom: 1px solid rgba(11,111,164,0.25);
  transition: border-color 0.2s;
}
.article-body a:hover {
  border-color: #0B6FA4;
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
  border-radius: 8px;
  overflow: hidden;
}
.article-body table th,
.article-body table td {
  border: 1px solid #E4EBF0;
  padding: 12px 16px;
  text-align: left;
}
.article-body table th {
  background: #E6F2F9;
  font-weight: 600;
  color: #084F75;
}
.article-body table tr:nth-child(even) {
  background: #F8FBFD;
}
.article-body hr {
  border: none;
  border-top: 1px solid #E4EBF0;
  margin: 32px 0;
}

/* ===== 标签 ===== */
.badge-pill {
  display: inline-flex;
  align-items: center;
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  background: #E6F2F9;
  color: #0B6FA4;
  white-space: nowrap;
  transition: background 0.2s, color 0.2s;
}
.badge-pill:hover {
  background: #0B6FA4;
  color: #fff;
}
.badge-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #12A5A0;
  flex-shrink: 0;
}

/* ===== 按钮焦点 ===== */
.btn-focus:focus-visible {
  outline: 3px solid rgba(11,111,164,0.35);
  outline-offset: 2px;
}
.btn-white-focus:focus-visible {
  outline: 3px solid rgba(255,255,255,0.4);
  outline-offset: 2px;
}

/* ===== 相关推荐卡片 ===== */
.rel-card {
  background: #FFFFFF;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid #E4EBF0;
  box-shadow: 0 4px 16px rgba(11,111,164,0.06);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.rel-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 28px rgba(11,111,164,0.14);
  border-color: rgba(11,111,164,0.3);
}
.rel-card img {
  aspect-ratio: 4/3;
  object-fit: cover;
  width: 100%;
  transition: transform 0.4s ease;
}
.rel-card:hover img {
  transform: scale(1.04);
}

/* ===== 移动端横滚 ===== */
.mobile-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  padding-bottom: 2px;
  -webkit-overflow-scrolling: touch;
}
.mobile-tabs::-webkit-scrollbar { display: none; }

/* ===== 上一篇/下一篇 ===== */
.pn-card {
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}
.pn-card:hover {
  border-color: rgba(11,111,164,0.35);
  box-shadow: 0 4px 16px rgba(11,111,164,0.08);
  transform: translateY(-2px);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .nav-container { padding: 0 20px; }
}
@media (max-width: 768px) {
  .nav-container { padding: 0 16px; }
  .article-body { font-size: 15px; }
  .article-body h2 { font-size: 21px; }
  .article-body h3 { font-size: 17px; }
  .article-body blockquote { font-size: 14px; padding: 14px 16px; }
  .article-body table { font-size: 13px; }
  .article-body table th,
  .article-body table td { padding: 8px 10px; }
}
@media (max-width: 520px) {
  .article-body { font-size: 15px; line-height: 1.85; }
}

/* ===== 打印友好 ===== */
@media print {
  .nav-wrap, footer, .mobile-tabs, .rel-card, .pn-card, section.bg-primary { display: none !important; }
  body { background: #fff; }
  .article-body { max-width: 100%; }
}