/* roulang page: index */
/* ===== Design Tokens ===== */
        :root {
            --c-primary: #1e3a8a;
            --c-primary-rgb: 30, 58, 138;
            --c-primary-light: #2d4fc7;
            --c-primary-dark: #162a63;
            --c-accent: #f59e0b;
            --c-accent-light: #fbbf24;
            --c-accent-dark: #d97706;
            --c-bg: #f6f8fb;
            --c-bg-alt: #eef2f7;
            --c-dark-bg: #0f1f3d;
            --c-white: #ffffff;
            --c-text: #16213e;
            --c-text-muted: #5a6a85;
            --c-text-light: #8a99b3;
            --c-border: #e2e8f0;
            --c-success: #10b981;
            --radius-lg: 18px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 12px rgba(30, 58, 138, 0.06);
            --shadow-md: 0 8px 28px rgba(30, 58, 138, 0.1);
            --shadow-lg: 0 16px 44px rgba(30, 58, 138, 0.16);
            --transition: all 0.3s ease;
            --container-w: 1200px;
            --section-space: 100px;
            --font-main: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

        /* ===== Base / Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

        html { scroll-behavior: smooth; }

        body {
            font-family: var(--font-main);
            font-size: 16px;
            line-height: 1.75;
            color: var(--c-text);
            background: var(--c-bg);
            -webkit-font-smoothing: antialiased;
        }

        img { max-width: 100%; height: auto; display: block; border: 0; }

        a { color: var(--c-primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--c-primary-light); }

        ul, ol { list-style: none; }

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

        input, select, textarea { font-family: inherit; font-size: 1rem; }

        .container {
            width: 100%;
            max-width: var(--container-w);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section { padding: var(--section-space) 0; }
        .section-alt { background: var(--c-bg-alt); }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 0.95rem;
            line-height: 1.2;
            border: 2px solid transparent;
            transition: var(--transition);
            text-align: center;
            white-space: nowrap;
        }

        .btn i { font-size: 1.05em; }

        .btn-primary {
            background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-light) 100%);
            color: #fff;
            box-shadow: 0 8px 24px rgba(var(--c-primary-rgb), 0.25);
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, var(--c-primary-light) 0%, var(--c-primary) 100%);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 14px 32px rgba(var(--c-primary-rgb), 0.32);
        }
        .btn-primary:active { transform: translateY(0); box-shadow: 0 4px 12px rgba(var(--c-primary-rgb), 0.2); }
        .btn-primary:focus-visible { outline: 3px solid rgba(var(--c-primary-rgb), 0.4); outline-offset: 3px; }

        .btn-accent {
            background: linear-gradient(135deg, var(--c-accent) 0%, var(--c-accent-light) 100%);
            color: #fff;
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.25);
        }
        .btn-accent:hover { color: #fff; transform: translateY(-3px); box-shadow: 0 14px 32px rgba(245, 158, 11, 0.35); }
        .btn-accent:active { transform: translateY(0); }

        .btn-outline {
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
            background: transparent;
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
        }

        .btn-outline-dark {
            border-color: var(--c-border);
            color: var(--c-primary);
            background: #fff;
        }
        .btn-outline-dark:hover {
            border-color: var(--c-primary);
            background: rgba(var(--c-primary-rgb), 0.04);
            color: var(--c-primary);
        }

        .btn-sm { padding: 10px 22px; font-size: 0.88rem; }
        .btn-lg { padding: 17px 40px; font-size: 1.05rem; }

        /* ===== Tag / Badge ===== */
        .tag {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 999px;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        .tag-primary { background: rgba(var(--c-primary-rgb), 0.08); color: var(--c-primary); }
        .tag-accent { background: rgba(245, 158, 11, 0.15); color: var(--c-accent-dark); }
        .tag-muted { background: rgba(100, 116, 139, 0.1); color: var(--c-text-muted); }
        .tag-success { background: rgba(16, 185, 129, 0.12); color: #0a9668; }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            transition: var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 6px 24px rgba(15, 23, 42, 0.08);
            background: rgba(255, 255, 255, 0.97);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 74px;
            gap: 24px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.2rem;
            box-shadow: 0 4px 14px rgba(var(--c-primary-rgb), 0.3);
        }

        .brand-text {
            font-size: 1.05rem;
            font-weight: 900;
            color: var(--c-text);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }

        .brand-text em { font-style: normal; color: var(--c-primary); }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-link {
            display: inline-block;
            padding: 9px 16px;
            border-radius: 999px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--c-text-muted);
            position: relative;
        }

        .nav-link:hover {
            color: var(--c-primary);
            background: rgba(var(--c-primary-rgb), 0.05);
        }

        .nav-link.active {
            color: var(--c-primary);
            background: rgba(var(--c-primary-rgb), 0.08);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 3px;
            background: var(--c-accent);
        }

        .nav-cta {
            flex-shrink: 0;
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            border: 1px solid var(--c-border);
            background: #fff;
            color: var(--c-primary);
            font-size: 1.2rem;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .nav-toggle:hover { border-color: var(--c-primary); color: var(--c-primary); }
        .nav-toggle.active i::before { content: '\f00d'; }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            margin-top: 0;
            padding-top: 0;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(12, 22, 46, 0.92) 0%, rgba(22, 42, 99, 0.78) 55%, rgba(30, 58, 138, 0.45) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            padding: 160px 24px 100px;
            text-align: center;
            max-width: 900px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 9px 20px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.22);
            color: #fff;
            font-size: 0.88rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            backdrop-filter: blur(8px);
            margin-bottom: 28px;
        }

        .hero-badge i { color: var(--c-accent-light); }

        .hero h1 {
            font-size: clamp(2.4rem, 5.5vw, 4.2rem);
            font-weight: 900;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -1.5px;
            margin-bottom: 22px;
            text-shadow: 0 4px 30px rgba(0, 0, 0, 0.25);
        }

        .hero h1 span {
            color: var(--c-accent-light);
        }

        .hero-sub {
            font-size: clamp(1rem, 1.6vw, 1.2rem);
            color: rgba(255, 255, 255, 0.82);
            max-width: 680px;
            margin: 0 auto 38px;
            line-height: 1.9;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            margin-bottom: 60px;
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 40px;
        }

        .stat-item {
            text-align: center;
            padding: 0 24px;
            border-right: 1px solid rgba(255, 255, 255, 0.16);
        }

        .stat-item:last-child { border-right: none; }

        .stat-num {
            display: block;
            font-size: 1.9rem;
            font-weight: 900;
            color: #fff;
            line-height: 1.2;
        }

        .stat-label {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.6);
            letter-spacing: 0.5px;
            margin-top: 4px;
        }

        /* ===== Section Header ===== */
        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 999px;
            background: rgba(var(--c-primary-rgb), 0.07);
            color: var(--c-primary);
            font-size: 0.84rem;
            font-weight: 700;
            letter-spacing: 1px;
            margin-bottom: 14px;
        }

        .section-head h2 {
            font-size: clamp(1.7rem, 3vw, 2.4rem);
            font-weight: 900;
            color: var(--c-text);
            letter-spacing: -0.8px;
            margin-bottom: 14px;
            line-height: 1.35;
        }

        .section-head p {
            color: var(--c-text-muted);
            font-size: 1.02rem;
            line-height: 1.8;
        }

        /* ===== Feature Cards ===== */
        .features-grid { row-gap: 28px; }

        .feature-card {
            background: var(--c-white);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-lg);
            padding: 38px 28px;
            height: 100%;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.45s ease;
        }

        .feature-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(var(--c-primary-rgb), 0.2);
        }

        .feature-card:hover::before { transform: scaleX(1); }

        .feature-icon {
            width: 64px;
            height: 64px;
            border-radius: 18px;
            background: linear-gradient(135deg, rgba(var(--c-primary-rgb), 0.08), rgba(var(--c-primary-rgb), 0.02));
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--c-primary);
            font-size: 1.6rem;
            margin-bottom: 22px;
            transition: var(--transition);
        }

        .feature-card:hover .feature-icon {
            background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
            color: #fff;
            box-shadow: 0 10px 24px rgba(var(--c-primary-rgb), 0.28);
        }

        .feature-card h3 {
            font-size: 1.13rem;
            font-weight: 800;
            margin-bottom: 10px;
        }

        .feature-card p {
            font-size: 0.92rem;
            color: var(--c-text-muted);
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* ===== Category Cards ===== */
        .category-grid { row-gap: 28px; }

        .category-card {
            position: relative;
            display: block;
            border-radius: var(--radius-lg);
            overflow: hidden;
            height: 300px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .category-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }

        .category-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .category-card:hover img { transform: scale(1.06); }

        .category-card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(12, 22, 46, 0.88) 0%, rgba(12, 22, 46, 0.35) 60%, rgba(0, 0, 0, 0) 100%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 32px;
        }

        .category-card-overlay .tag {
            align-self: flex-start;
            margin-bottom: 12px;
        }

        .category-card-overlay h3 {
            color: #fff;
            font-size: 1.45rem;
            font-weight: 800;
            margin-bottom: 8px;
            letter-spacing: -0.3px;
        }

        .category-card-overlay p {
            color: rgba(255, 255, 255, 0.78);
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 14px;
            max-width: 220px;
        }

        .category-card-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--c-accent-light);
            font-size: 0.9rem;
            font-weight: 700;
        }

        .category-card-link:hover { color: #fff; gap: 12px; }

        /* ===== News / CMS List ===== */
        .news-grid { row-gap: 28px; }

        .news-card {
            background: var(--c-white);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            padding: 28px;
            display: flex;
            flex-direction: column;
            transition: var(--transition);
            height: 100%;
        }

        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-color: rgba(var(--c-primary-rgb), 0.18);
        }

        .news-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 14px;
        }

        .news-title {
            font-size: 1.06rem;
            font-weight: 800;
            line-height: 1.5;
            margin-bottom: 12px;
            color: var(--c-text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card a:hover .news-title { color: var(--c-primary); }

        .news-excerpt {
            font-size: 0.9rem;
            color: var(--c-text-muted);
            line-height: 1.75;
            flex: 1;
            margin-bottom: 18px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-date {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.8rem;
            color: var(--c-text-light);
        }

        .empty-tip {
            grid-column: 1 / -1;
            text-align: center;
            padding: 80px 24px;
            background: var(--c-white);
            border: 2px dashed var(--c-border);
            border-radius: var(--radius-lg);
            color: var(--c-text-muted);
            font-size: 1.05rem;
        }

        /* ===== Process ===== */
        .process-section {
            background: url('/assets/images/backpic/back-2.png') center / cover no-repeat;
            position: relative;
        }

        .process-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 31, 61, 0.95), rgba(22, 42, 99, 0.85));
        }

        .process-section .container { position: relative; z-index: 2; }
        .process-section .section-head h2 { color: #fff; }
        .process-section .section-head p { color: rgba(255, 255, 255, 0.7); }
        .process-section .section-tag { background: rgba(255, 255, 255, 0.1); color: var(--c-accent-light); }

        .process-steps { row-gap: 28px; }

        .step-card {
            text-align: center;
            padding: 36px 24px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(8px);
            height: 100%;
            transition: var(--transition);
        }

        .step-card:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateY(-5px);
        }

        .step-num {
            width: 46px;
            height: 46px;
            margin: 0 auto 16px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--c-accent), var(--c-accent-light));
            color: #fff;
            font-weight: 900;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 8px 20px rgba(245, 158, 11, 0.35);
        }

        .step-card h3 {
            color: #fff;
            font-size: 1.08rem;
            font-weight: 800;
            margin-bottom: 10px;
        }

        .step-card p {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.88rem;
            line-height: 1.7;
            margin-bottom: 0;
        }

        .process-note {
            margin-top: 44px;
            text-align: center;
        }

        .process-note p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 0.95rem;
            margin-bottom: 20px;
        }

        /* ===== Featured Content ===== */
        .featured-grid { row-gap: 28px; }

        .featured-card {
            background: var(--c-white);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: var(--transition);
        }

        .featured-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .featured-media {
            position: relative;
            height: 190px;
            overflow: hidden;
        }

        .featured-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .featured-card:hover .featured-media img { transform: scale(1.05); }

        .featured-media .tag {
            position: absolute;
            top: 14px;
            left: 14px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.18);
        }

        .featured-body {
            padding: 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .featured-body h3 {
            font-size: 1.05rem;
            font-weight: 800;
            line-height: 1.5;
            margin-bottom: 10px;
        }

        .featured-body p {
            font-size: 0.89rem;
            color: var(--c-text-muted);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }

        .featured-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--c-text-light);
            border-top: 1px solid var(--c-border);
            padding-top: 14px;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 840px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--c-white);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover { border-color: rgba(var(--c-primary-rgb), 0.2); box-shadow: var(--shadow-sm); }

        .faq-item.is-active { border-color: rgba(var(--c-primary-rgb), 0.3); box-shadow: var(--shadow-md); }

        .faq-question {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 22px 24px;
            font-size: 1.02rem;
            font-weight: 800;
            color: var(--c-text);
            cursor: pointer;
            width: 100%;
            text-align: left;
            transition: var(--transition);
            background: transparent;
        }

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

        .faq-icon {
            flex-shrink: 0;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: rgba(var(--c-primary-rgb), 0.08);
            color: var(--c-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            transition: var(--transition);
        }

        .faq-item.is-active .faq-icon {
            background: var(--c-primary);
            color: #fff;
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }

        .faq-answer-inner {
            padding: 0 24px 24px 68px;
            color: var(--c-text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: url('/assets/images/backpic/back-3.png') center / cover no-repeat;
            position: relative;
            padding: 100px 0;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(15, 31, 61, 0.94), rgba(30, 58, 138, 0.72));
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            color: #fff;
            font-size: clamp(1.7rem, 3.2vw, 2.5rem);
            font-weight: 900;
            margin-bottom: 16px;
            letter-spacing: -0.8px;
        }

        .cta-inner p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.05rem;
            margin-bottom: 36px;
            line-height: 1.8;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--c-dark-bg);
            color: rgba(255, 255, 255, 0.6);
            padding: 70px 0 0;
        }

        .footer-grid { row-gap: 36px; }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 18px;
        }

        .footer-brand .brand-icon {
            width: 38px;
            height: 38px;
            font-size: 1.05rem;
        }

        .footer-brand .brand-text {
            color: #fff;
            font-size: 1rem;
            font-weight: 900;
        }

        .footer-about p {
            font-size: 0.9rem;
            line-height: 1.8;
            margin-bottom: 0;
        }

        .footer-title {
            color: #fff;
            font-size: 1rem;
            font-weight: 800;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 3px;
            border-radius: 3px;
            background: var(--c-accent);
        }

        .footer-menu li { margin-bottom: 10px; }

        .footer-menu a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }

        .footer-menu a i { font-size: 0.6rem; color: var(--c-accent-light); }

        .footer-menu a:hover { color: #fff; padding-left: 4px; }

        .footer-contact li {
            display: flex;
            gap: 12px;
            margin-bottom: 12px;
            font-size: 0.9rem;
            align-items: flex-start;
        }

        .footer-contact li i {
            color: var(--c-accent-light);
            margin-top: 4px;
            width: 18px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 50px;
            padding: 24px 0;
            text-align: center;
            font-size: 0.84rem;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom a { color: rgba(255, 255, 255, 0.55); }
        .footer-bottom a:hover { color: var(--c-accent-light); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            :root { --section-space: 76px; }
            .header-inner { height: 66px; }
            .main-nav { gap: 16px; }
            .nav-link { padding: 8px 12px; font-size: 0.9rem; }
        }

        @media (max-width: 768px) {
            :root { --section-space: 58px; }

            .header-inner {
                height: 62px;
                position: relative;
            }

            .brand-text { font-size: 0.92rem; }
            .brand-icon { width: 34px; height: 34px; font-size: 1rem; border-radius: 10px; }

            .nav-toggle {
                display: inline-flex;
                z-index: 1002;
            }

            .main-nav {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: flex-start;
                padding: 86px 24px 28px;
                gap: 20px;
                box-shadow: 0 20px 40px rgba(15, 23, 42, 0.15);
                border-bottom: 1px solid var(--c-border);
                transform: translateY(-110%);
                transition: transform 0.35s ease;
                z-index: 1001;
            }

            .main-nav.nav-open { transform: translateY(0); }

            .nav-menu {
                flex-direction: column;
                align-items: stretch;
                width: 100%;
                gap: 4px;
            }

            .nav-link {
                display: block;
                padding: 12px 16px;
                font-size: 1rem;
                border-radius: 10px;
            }

            .nav-link.active::after { display: none; }

            .nav-cta {
                width: 100%;
                justify-content: center;
            }

            .hero { min-height: auto; }
            .hero-content { padding: 130px 20px 70px; }
            .hero-stats { gap: 16px; }
            .stat-item { padding: 0 12px; }
            .stat-num { font-size: 1.4rem; }
            .hero-actions .btn { width: 100%; }

            .category-card { height: 240px; }
            .category-card-overlay { padding: 22px; }

            .faq-answer-inner { padding-left: 24px; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .brand-text { font-size: 0.82rem; letter-spacing: -0.4px; }
            .brand-icon { width: 32px; height: 32px; }

            .hero-content { padding: 120px 14px 56px; }
            .hero h1 { font-size: 2rem; letter-spacing: -0.8px; }
            .hero-sub { font-size: 0.95rem; }
            .hero-actions { margin-bottom: 42px; }

            .stat-item { border-right: none; border-bottom: 1px solid rgba(255, 255, 255, 0.12); padding: 12px 24px; }
            .stat-item:last-child { border-bottom: none; }

            .section-head h2 { font-size: 1.55rem; }
            .feature-card { padding: 26px 20px; }

            .step-card { padding: 28px 18px; }

            .featured-media { height: 160px; }

            .faq-question { font-size: 0.95rem; padding: 18px 18px; }
            .faq-answer-inner { padding: 0 18px 20px; }

            .cta-inner h2 { font-size: 1.6rem; }
            .cta-actions .btn { width: 100%; }

            .footer-bottom { font-size: 0.8rem; padding: 18px 12px; line-height: 1.6; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-1 { margin-top: 8px; }
        .mt-2 { margin-top: 16px; }
        .mt-3 { margin-top: 24px; }

        /* ===== Focus visible for accessibility ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(var(--c-primary-rgb), 0.5);
            outline-offset: 3px;
            border-radius: 4px;
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f6dfc;
            --primary-dark: #0a4fc0;
            --primary-light: #e8f0fe;
            --secondary: #00c9a7;
            --accent: #ff8a3d;
            --dark: #0b1b33;
            --dark-soft: #122a4a;
            --bg: #f5f8fc;
            --bg-alt: #eef4fa;
            --white: #ffffff;
            --text: #1e293b;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 10px 30px rgba(15, 109, 252, 0.08);
            --shadow-hover: 0 18px 40px rgba(15, 109, 252, 0.16);
            --transition: all 0.3s ease;
            --space-section: 90px;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            line-height: 1.4;
            text-align: center;
        }

        .btn i {
            font-size: 14px;
        }

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

        .btn-primary:hover {
            background: var(--primary-dark);
            color: var(--white);
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(15, 109, 252, 0.28);
        }

        .btn-accent {
            background: var(--accent);
            color: var(--white);
        }

        .btn-accent:hover {
            background: #f0751e;
            color: var(--white);
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(255, 138, 61, 0.28);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary);
            color: var(--white);
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
        }

        .btn-lg {
            padding: 15px 36px;
            font-size: 16px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 12px rgba(11, 27, 51, 0.04);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
            gap: 24px;
            position: relative;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }

        .brand-logo:hover {
            color: var(--dark);
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--white);
            font-size: 17px;
            box-shadow: 0 6px 16px rgba(15, 109, 252, 0.25);
        }

        .brand-text {
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 30px;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0;
        }

        .nav-link {
            display: inline-block;
            padding: 10px 18px;
            border-radius: 40px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            transition: var(--transition);
        }

        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .nav-link.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 700;
        }

        .nav-cta {
            flex-shrink: 0;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            font-size: 20px;
            color: var(--dark);
            cursor: pointer;
            transition: var(--transition);
            align-items: center;
            justify-content: center;
        }

        .nav-toggle:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        /* ===== 页面Banner ===== */
        .page-banner {
            position: relative;
            background-image: linear-gradient(100deg, rgba(11, 27, 51, 0.82), rgba(15, 109, 252, 0.68)), url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            padding: 100px 0 90px;
            color: var(--white);
            overflow: hidden;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            right: -80px;
            bottom: -80px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
        }

        .banner-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 20px;
        }

        .banner-breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
        }

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

        .banner-breadcrumb i {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
        }

        .page-banner h1 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 18px;
            max-width: 760px;
            color: var(--white);
        }

        .page-banner p {
            font-size: 17px;
            line-height: 1.8;
            max-width: 640px;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 28px;
        }

        .banner-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 30px;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: var(--white);
            font-size: 13px;
            font-weight: 500;
            backdrop-filter: blur(6px);
        }

        .banner-tag i {
            font-size: 12px;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: var(--space-section) 0;
        }

        .section-alt {
            background: var(--bg-alt);
        }

        .section-white {
            background: var(--white);
        }

        .section-header {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 50px;
        }

        .section-header .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary);
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }

        .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--dark);
            line-height: 1.35;
            margin-bottom: 12px;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        /* ===== 登录方式卡片 ===== */
        .login-cards {
            margin-top: 10px;
        }

        .login-card {
            background: var(--white);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(11, 27, 51, 0.04);
        }

        .login-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(15, 109, 252, 0.25);
        }

        .login-card-img {
            height: 190px;
            width: 100%;
            overflow: hidden;
            position: relative;
        }

        .login-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .login-card:hover .login-card-img img {
            transform: scale(1.05);
        }

        .login-card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(11, 27, 51, 0.35));
        }

        .card-badge {
            position: absolute;
            top: 14px;
            right: 14px;
            z-index: 2;
            background: rgba(255, 255, 255, 0.92);
            color: var(--primary);
            padding: 4px 14px;
            border-radius: 30px;
            font-size: 12px;
            font-weight: 700;
            box-shadow: 0 4px 12px rgba(11, 27, 51, 0.1);
            backdrop-filter: blur(4px);
        }

        .login-card-body {
            padding: 26px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .login-card-body h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
        }

        .login-card-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 16px;
            flex: 1;
        }

        .login-card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 18px;
        }

        .mini-tag {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 12px;
            font-weight: 600;
            color: var(--text-muted);
            background: var(--bg);
            padding: 4px 12px;
            border-radius: 30px;
        }

        .mini-tag i {
            font-size: 11px;
            color: var(--secondary);
        }

        .login-card-body .btn {
            align-self: flex-start;
        }

        /* ===== 登录步骤 ===== */
        .steps-wrap {
            position: relative;
            margin-top: 20px;
        }

        .steps-grid {
            counter-reset: step;
            position: relative;
            z-index: 1;
        }

        .step-item {
            position: relative;
            background: var(--white);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 30px 24px;
            height: 100%;
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(11, 27, 51, 0.03);
        }

        .step-item:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
            border-color: rgba(15, 109, 252, 0.3);
        }

        .step-num {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--primary), #3b82f6);
            color: var(--white);
            font-size: 20px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            box-shadow: 0 8px 20px rgba(15, 109, 252, 0.25);
        }

        .step-item h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
        }

        .step-arrow {
            position: absolute;
            top: 50%;
            right: -20px;
            transform: translateY(-50%);
            z-index: 2;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--secondary);
            color: var(--white);
            font-size: 13px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 6px 16px rgba(0, 201, 167, 0.3);
        }

        /* ===== 安全提示 ===== */
        .security-wrapper {
            background: var(--white);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 50px;
            box-shadow: var(--shadow);
            position: relative;
            overflow: hidden;
        }

        .security-wrapper::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 260px;
            height: 260px;
            border-radius: 0 0 0 50%;
            background: linear-gradient(135deg, transparent, rgba(15, 109, 252, 0.04));
        }

        .security-left {
            position: relative;
            z-index: 1;
        }

        .security-left h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 14px;
        }

        .security-left p {
            font-size: 15px;
            color: var(--text-muted);
            margin-bottom: 24px;
            line-height: 1.8;
        }

        .security-list {
            margin: 0;
        }

        .security-list li {
            display: flex;
            gap: 14px;
            padding: 14px 0;
            border-bottom: 1px solid var(--border);
            align-items: flex-start;
        }

        .security-list li:last-child {
            border-bottom: none;
        }

        .security-list .sec-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .security-list .sec-text {
            font-size: 15px;
            color: var(--text);
            line-height: 1.7;
        }

        .security-list .sec-text strong {
            display: block;
            font-weight: 700;
            margin-bottom: 2px;
        }

        .security-img {
            position: relative;
            z-index: 1;
            border-radius: var(--radius);
            overflow: hidden;
            height: 100%;
            min-height: 360px;
            box-shadow: 0 20px 40px rgba(11, 27, 51, 0.12);
        }

        .security-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .security-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(11, 27, 51, 0.5));
        }

        .security-img-caption {
            position: absolute;
            bottom: 20px;
            left: 20px;
            z-index: 2;
            color: var(--white);
            font-size: 14px;
            background: rgba(11, 27, 51, 0.55);
            padding: 8px 16px;
            border-radius: 30px;
            backdrop-filter: blur(4px);
        }

        /* ===== FAQ ===== */
        .faq-wrapper {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(15, 109, 252, 0.3);
            box-shadow: var(--shadow);
        }

        .faq-question {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--dark);
            transition: var(--transition);
        }

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

        .faq-question .faq-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            flex-shrink: 0;
            transition: var(--transition);
        }

        .faq-item.active .faq-icon {
            background: var(--primary);
            color: var(--white);
            transform: rotate(180deg);
        }

        .faq-question .faq-arrow {
            margin-left: auto;
            color: var(--text-muted);
            transition: var(--transition);
            font-size: 13px;
        }

        .faq-item.active .faq-arrow {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }

        .faq-answer-inner {
            padding: 0 24px 22px 70px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.85;
        }

        /* ===== CTA ===== */
        .cta-section {
            background-image: linear-gradient(100deg, rgba(11, 27, 51, 0.85), rgba(15, 109, 252, 0.72)), url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            position: relative;
            overflow: hidden;
        }

        .cta-inner {
            text-align: center;
            padding: 70px 20px;
            position: relative;
            z-index: 1;
        }

        .cta-inner h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--white);
            margin-bottom: 14px;
        }

        .cta-inner p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin: 0 auto 30px;
        }

        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .cta-buttons .btn-white {
            background: var(--white);
            color: var(--primary);
        }

        .cta-buttons .btn-white:hover {
            background: var(--primary-light);
            color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 70px 0 0;
        }

        .footer-grid {
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--white);
            margin-bottom: 16px;
        }

        .footer-brand .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--white);
            font-size: 17px;
        }

        .footer-about {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 420px;
            margin-bottom: 0;
        }

        .footer-title {
            color: var(--white);
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 3px;
            border-radius: 4px;
            background: var(--secondary);
        }

        .footer-menu li {
            margin-bottom: 8px;
        }

        .footer-menu a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-menu a i {
            font-size: 12px;
            color: var(--secondary);
        }

        .footer-menu a:hover {
            color: var(--white);
            padding-left: 4px;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 12px;
        }

        .footer-contact i {
            width: 24px;
            height: 24px;
            border-radius: 6px;
            background: rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
            color: var(--secondary);
        }

        .footer-bottom {
            text-align: center;
            padding: 24px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== 响应式 ===== */
        @media screen and (max-width: 1024px) {
            .page-banner {
                padding: 80px 0 70px;
            }

            .page-banner h1 {
                font-size: 34px;
            }

            .security-wrapper {
                padding: 36px;
            }

            .security-img {
                min-height: 300px;
            }

            .step-arrow {
                display: none;
            }
        }

        @media screen and (max-width: 768px) {
            :root {
                --space-section: 60px;
            }

            .site-header {
                padding: 0;
            }

            .header-inner {
                min-height: 64px;
                flex-wrap: wrap;
            }

            .nav-toggle {
                display: flex;
            }

            .main-nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--white);
                flex-direction: column;
                align-items: stretch;
                padding: 20px 24px 24px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 20px 40px rgba(11, 27, 51, 0.08);
                gap: 16px;
            }

            .main-nav.open {
                display: flex;
            }

            .nav-menu {
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
            }

            .nav-link {
                display: block;
                padding: 12px 16px;
                border-radius: 10px;
                font-size: 15px;
            }

            .nav-cta {
                margin-top: 8px;
                text-align: center;
            }

            .page-banner {
                padding: 70px 0 60px;
            }

            .page-banner h1 {
                font-size: 28px;
                line-height: 1.4;
            }

            .page-banner p {
                font-size: 15px;
            }

            .section-header h2 {
                font-size: 26px;
            }

            .login-card {
                margin-bottom: 20px;
            }

            .steps-grid {
                gap: 0;
            }

            .step-item {
                margin-bottom: 16px;
            }

            .security-wrapper {
                padding: 28px 24px;
            }

            .security-img {
                min-height: 240px;
            }

            .cta-inner {
                padding: 50px 16px;
            }

            .cta-inner h2 {
                font-size: 26px;
            }

            .faq-answer-inner {
                padding-left: 24px;
            }

            .footer-grid {
                padding-bottom: 20px;
            }

            .footer-grid > .cell {
                margin-bottom: 30px;
            }
        }

        @media screen and (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .brand-text {
                font-size: 17px;
            }

            .brand-icon {
                width: 36px;
                height: 36px;
                font-size: 15px;
            }

            .page-banner h1 {
                font-size: 24px;
            }

            .page-banner p {
                font-size: 14px;
            }

            .banner-tags {
                gap: 8px;
            }

            .banner-tag {
                font-size: 12px;
                padding: 5px 12px;
            }

            .section-header h2 {
                font-size: 22px;
            }

            .cta-buttons .btn {
                width: 100%;
            }

            .faq-question {
                font-size: 14px;
                padding: 16px 18px;
                gap: 10px;
            }

            .faq-answer-inner {
                font-size: 13px;
                padding: 0 18px 18px;
            }
        }

        /* ===== focus 可访问性 ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(15, 109, 252, 0.4);
            outline-offset: 2px;
        }

/* roulang page: article */
:root {
            --primary: #0f3d66;
            --primary-light: #1c5d99;
            --primary-lighter: #e8f1f9;
            --accent: #f5a623;
            --accent-dark: #d99113;
            --bg-body: #f6f8fb;
            --bg-white: #ffffff;
            --bg-dark: #0a2540;
            --text-dark: #1c2b36;
            --text-muted: #5f6f80;
            --text-light: #94a7b8;
            --border: #e5eaf0;
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-sm: 6px;
            --shadow-sm: 0 2px 8px rgba(21, 65, 102, .06);
            --shadow-md: 0 8px 24px rgba(21, 65, 102, .08);
            --shadow-lg: 0 16px 48px rgba(21, 65, 102, .12);
            --font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
            --transition: all .25s ease;
        }

        *, *::before, *::after { box-sizing: border-box; }

        html { scroll-behavior: smooth; }

        body {
            margin: 0;
            font-family: var(--font-body);
            background: var(--bg-body);
            color: var(--text-dark);
            line-height: 1.7;
            font-size: 16px;
        }

        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        ul, ol { margin: 0; padding: 0; }
        button { font-family: inherit; font-size: inherit; cursor: pointer; }
        input, select, textarea { font-family: inherit; font-size: inherit; }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, .96);
            backdrop-filter: blur(10px);
            box-shadow: var(--shadow-sm);
            border-bottom: 1px solid var(--border);
        }

        .header-inner {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 70px;
            gap: 20px;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: var(--primary);
            letter-spacing: .2px;
            white-space: nowrap;
        }

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            color: #fff;
            font-size: 18px;
            box-shadow: var(--shadow-sm);
            flex-shrink: 0;
        }

        .brand-text {
            font-size: 18px;
            background: linear-gradient(90deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 24px;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 4px;
        }

        .nav-link {
            display: inline-block;
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-dark);
            transition: var(--transition);
        }

        .nav-link:hover {
            color: var(--primary);
            background: var(--bg-body);
        }

        .nav-link.active {
            color: var(--primary);
            background: rgba(28, 93, 153, .10);
            font-weight: 600;
        }

        .nav-link.active::after {
            content: "";
            display: block;
            height: 2px;
            width: 18px;
            margin: 2px auto 0;
            background: var(--accent);
            border-radius: 2px;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 22px;
            color: var(--text-dark);
            padding: 6px;
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }

        .nav-toggle:hover { color: var(--primary); background: var(--bg-body); }

        .nav-toggle:focus-visible,
        .nav-link:focus-visible,
        .btn:focus-visible,
        a:focus-visible {
            outline: 3px solid rgba(245, 166, 35, .4);
            outline-offset: 2px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 11px 24px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 15px;
            line-height: 1.4;
            border: 2px solid transparent;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .btn:active { transform: translateY(0); box-shadow: var(--shadow-sm); }

        .btn-accent {
            background: var(--accent);
            color: #1a1a1a;
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: #fff;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover { background: var(--primary-light); border-color: var(--primary-light); }

        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, .7);
        }
        .btn-outline:hover { background: rgba(255, 255, 255, .12); border-color: #fff; color: #fff; }

        .btn-sm { padding: 8px 16px; font-size: 14px; }

        .nav-cta { margin-left: 8px; }

        /* ===== Page Hero ===== */
        .page-hero {
            position: relative;
            padding: 92px 0 76px;
            background-color: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            color: #fff;
            overflow: hidden;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 37, 64, .88) 0%, rgba(10, 37, 64, .70) 55%, rgba(10, 37, 64, .90) 100%);
        }

        .page-hero .container { position: relative; z-index: 2; }

        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 14px;
            margin-bottom: 16px;
            color: rgba(255, 255, 255, .82);
        }

        .breadcrumb a { color: rgba(255, 255, 255, .88); }
        .breadcrumb a:hover { color: var(--accent); }
        .breadcrumb .sep { opacity: .55; }
        .breadcrumb .current { color: var(--accent); }

        .page-hero h1 {
            font-size: clamp(30px, 5vw, 44px);
            line-height: 1.25;
            margin: 0 0 16px;
            font-weight: 700;
            max-width: 760px;
            letter-spacing: .5px;
        }

        .page-hero .lead {
            font-size: 16px;
            color: rgba(255, 255, 255, .88);
            max-width: 620px;
            margin-bottom: 0;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            margin-top: 18px;
            font-size: 14px;
            color: rgba(255, 255, 255, .88);
        }

        .article-meta .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }

        .article-meta .meta-item i { color: var(--accent); }

        /* ===== Article Section ===== */
        .article-section {
            padding: 56px 0 24px;
        }

        .article-body {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            padding: 42px 46px;
            border: 1px solid var(--border);
        }

        .article-content {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-dark);
        }

        .article-content h2 {
            font-size: 26px;
            margin: 36px 0 16px;
            color: var(--primary);
            padding-bottom: 8px;
            border-bottom: 2px solid var(--primary-lighter);
        }

        .article-content h3 {
            font-size: 21px;
            margin: 28px 0 12px;
            color: var(--primary);
        }

        .article-content p {
            margin: 0 0 20px;
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 22px 26px;
        }

        .article-content ul li,
        .article-content ol li {
            margin-bottom: 8px;
        }

        .article-content ul li::marker { color: var(--primary-light); }

        .article-content blockquote {
            border-left: 4px solid var(--accent);
            background: #fffaf0;
            padding: 18px 22px;
            margin: 0 0 22px;
            border-radius: 0 8px 8px 0;
            color: var(--text-muted);
            font-style: normal;
        }

        .article-content img {
            border-radius: var(--radius-md);
            margin: 12px 0 22px;
            box-shadow: var(--shadow-sm);
        }

        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content a:hover { color: var(--accent-dark); }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 0 0 22px;
            font-size: 14px;
        }
        .article-content table th,
        .article-content table td {
            border: 1px solid var(--border);
            padding: 10px 14px;
            text-align: left;
        }
        .article-content table th { background: var(--primary-lighter); font-weight: 600; }

        /* ===== Not Found ===== */
        .not-found-panel {
            text-align: center;
            padding: 50px 20px 56px;
        }

        .not-found-panel .nf-icon {
            font-size: 48px;
            color: var(--accent);
            margin-bottom: 16px;
        }

        .not-found-panel h2 {
            font-size: 28px;
            color: var(--primary);
            margin: 0 0 10px;
        }

        .not-found-panel p {
            color: var(--text-muted);
            max-width: 420px;
            margin: 0 auto 24px;
        }

        .not-found-panel .btn { margin: 0 6px; }

        /* ===== Sidebar ===== */
        .article-sidebar {
            position: sticky;
            top: 92px;
            display: flex;
            flex-direction: column;
            gap: 22px;
        }

        .side-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .side-card:hover { box-shadow: var(--shadow-md); }

        .side-card h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 9px;
            padding-bottom: 10px;
            border-bottom: 1px dashed var(--border);
        }

        .side-card h3 i { color: var(--accent); }

        .side-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 12px;
            line-height: 1.8;
        }

        .side-list {
            list-style: none;
        }

        .side-list li {
            margin-bottom: 4px;
        }

        .side-list a {
            font-size: 14px;
            color: var(--text-dark);
            padding: 7px 10px;
            display: flex;
            align-items: center;
            gap: 8px;
            border-radius: 6px;
            transition: var(--transition);
        }

        .side-list a i {
            font-size: 12px;
            color: var(--primary-light);
            width: 16px;
            text-align: center;
        }

        .side-list a:hover {
            color: var(--primary);
            background: var(--primary-lighter);
            padding-left: 14px;
        }

        .side-card-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            border: none;
            position: relative;
            overflow: hidden;
        }

        .side-card-cta h3 { color: #fff; border-bottom-color: rgba(255, 255, 255, .18); }
        .side-card-cta p { color: rgba(255, 255, 255, .88); }
        .side-card-cta .btn-accent { width: 100%; margin-top: 6px; }

        .side-card-cta::after {
            content: "";
            position: absolute;
            right: -50px;
            top: -50px;
            width: 140px;
            height: 140px;
            background: rgba(255, 255, 255, .08);
            border-radius: 50%;
        }

        /* ===== Related Section ===== */
        .related-section {
            padding: 48px 0 30px;
        }

        .section-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 30px;
            gap: 16px;
        }

        .section-header h2 {
            font-size: 28px;
            color: var(--text-dark);
            margin: 0;
            font-weight: 700;
        }

        .section-header h2 span {
            color: var(--primary);
        }

        .section-line {
            flex: 1;
            height: 2px;
            background: linear-gradient(90deg, var(--primary-light), transparent);
            border-radius: 2px;
            max-width: 260px;
        }

        .section-link {
            font-size: 14px;
            color: var(--primary);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }
        .section-link:hover { color: var(--accent-dark); gap: 8px; }

        .related-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .related-card .card-img {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: var(--bg-body);
        }

        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .related-card:hover .card-img img { transform: scale(1.05); }

        .related-card .card-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 37, 64, 0), rgba(10, 37, 64, .35));
        }

        .related-card .card-body {
            padding: 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(28, 93, 153, .12);
            color: var(--primary);
            align-self: flex-start;
        }

        .badge-accent {
            background: rgba(245, 166, 35, .16);
            color: var(--accent-dark);
        }

        .related-card .card-title {
            font-size: 16px;
            font-weight: 600;
            margin: 12px 0 8px;
            line-height: 1.55;
            color: var(--text-dark);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-text {
            font-size: 14px;
            color: var(--text-muted);
            flex: 1;
            line-height: 1.75;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 12px;
        }
        .related-card .card-more:hover { color: var(--accent-dark); gap: 9px; }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: 46px 0 30px;
        }

        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 6px 24px;
            margin-bottom: 14px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .faq-item:hover { border-color: rgba(28, 93, 153, .25); box-shadow: var(--shadow-md); }

        .faq-item summary {
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: var(--text-dark);
            padding: 14px 0;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 14px;
        }

        .faq-item summary::-webkit-details-marker { display: none; }

        .faq-item summary::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            color: var(--primary);
            transition: var(--transition);
            flex-shrink: 0;
            font-size: 14px;
        }

        .faq-item[open] summary::after { transform: rotate(180deg); }

        .faq-item .faq-answer {
            padding: 0 0 16px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.85;
            border-top: 1px dashed var(--border);
            padding-top: 14px;
        }

        .faq-item .faq-answer a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
        .faq-item .faq-answer a:hover { color: var(--accent-dark); }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 44px 0 30px;
        }

        .cta-banner {
            position: relative;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            border-radius: var(--radius-lg);
            padding: 52px 48px;
            color: #fff;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }

        .cta-banner::before {
            content: "";
            position: absolute;
            left: -80px;
            bottom: -100px;
            width: 260px;
            height: 260px;
            background: rgba(255, 255, 255, .06);
            border-radius: 50%;
        }

        .cta-banner::after {
            content: "";
            position: absolute;
            right: -50px;
            top: -60px;
            width: 180px;
            height: 180px;
            background: rgba(255, 255, 255, .08);
            border-radius: 50%;
        }

        .cta-content { position: relative; z-index: 2; flex: 1; min-width: 260px; }

        .cta-content h2 {
            font-size: 27px;
            margin: 0 0 10px;
            font-weight: 700;
        }

        .cta-content p {
            color: rgba(255, 255, 255, .9);
            margin: 0;
            font-size: 15px;
            line-height: 1.8;
            max-width: 520px;
        }

        .cta-actions {
            position: relative;
            z-index: 2;
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }

        .cta-actions .btn { min-width: 150px; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: #9fb3c8;
            padding: 64px 0 0;
            margin-top: 50px;
        }

        .footer-grid {
            padding-bottom: 44px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-weight: 700;
            font-size: 20px;
            margin-bottom: 16px;
        }

        .footer-brand .brand-icon {
            width: 36px;
            height: 36px;
            font-size: 16px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            border-radius: 9px;
        }

        .footer-about {
            font-size: 14px;
            color: #8298ad;
            line-height: 1.9;
            max-width: 360px;
            margin-bottom: 0;
        }

        .footer-title {
            font-size: 16px;
            color: #fff;
            font-weight: 600;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 24px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .footer-menu {
            list-style: none;
        }

        .footer-menu li {
            margin-bottom: 11px;
        }

        .footer-menu a {
            color: #9fb3c8;
            font-size: 14px;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .footer-menu a i {
            font-size: 12px;
            color: var(--accent);
            transition: var(--transition);
        }

        .footer-menu a:hover {
            color: var(--accent);
            padding-left: 5px;
        }

        .footer-contact {
            list-style: none;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            margin-bottom: 12px;
            color: #9fb3c8;
        }

        .footer-contact li i {
            color: var(--accent);
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 22px 0;
            text-align: center;
            font-size: 13px;
            color: #66809b;
        }

        .footer-bottom p { margin: 0; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .container { padding-left: 24px; padding-right: 24px; }
            .page-hero h1 { font-size: 36px; }
            .article-body { padding: 34px 32px; }
            .cta-banner { padding: 44px 34px; }
            .cta-content h2 { font-size: 23px; }
        }

        @media (max-width: 768px) {
            body { font-size: 15px; }

            .nav-toggle {
                display: inline-flex;
            }

            .main-nav {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 16px 20px 22px;
                box-shadow: var(--shadow-lg);
                border-bottom: 1px solid var(--border);
                display: none;
                border-radius: 0 0 16px 16px;
            }

            .main-nav.open {
                display: flex;
            }

            .nav-menu {
                flex-direction: column;
                width: 100%;
                gap: 4px;
            }

            .nav-link {
                width: 100%;
                text-align: center;
                padding: 12px 14px;
                font-size: 16px;
            }

            .nav-cta {
                margin: 14px 0 0;
                width: 100%;
                justify-content: center;
            }

            .page-hero {
                padding: 60px 0 48px;
            }

            .page-hero h1 {
                font-size: 30px;
                letter-spacing: 0;
            }

            .page-hero .lead {
                font-size: 15px;
            }

            .article-section {
                padding: 32px 0 20px;
            }

            .article-body {
                padding: 26px 22px;
                border-radius: 12px;
            }

            .article-content h2 { font-size: 22px; }
            .article-content h3 { font-size: 19px; }

            .article-sidebar {
                position: static;
                margin-top: 26px;
            }

            .related-section { padding: 34px 0 20px; }
            .faq-section { padding: 32px 0 20px; }
            .cta-section { padding: 32px 0 20px; }

            .section-header h2 { font-size: 23px; }

            .section-header {
                flex-wrap: wrap;
            }

            .section-line { display: none; }

            .cta-banner {
                padding: 36px 26px;
                flex-direction: column;
                text-align: center;
            }

            .cta-content p { max-width: 400px; }

            .cta-actions {
                justify-content: center;
                width: 100%;
            }

            .cta-actions .btn { flex: 1; min-width: 130px; }

            .site-footer {
                padding-top: 48px;
            }
        }

        @media (max-width: 520px) {
            .container { padding-left: 16px; padding-right: 16px; }

            .brand-text { font-size: 16px; }
            .brand-icon { width: 34px; height: 34px; font-size: 15px; }

            .page-hero h1 { font-size: 25px; }
            .page-hero .lead { font-size: 14px; }

            .article-meta {
                gap: 12px;
                font-size: 13px;
            }

            .article-body {
                padding: 22px 18px;
            }

            .not-found-panel {
                padding: 34px 14px 40px;
            }

            .not-found-panel h2 { font-size: 23px; }

            .cta-actions {
                flex-direction: column;
            }

            .cta-actions .btn {
                width: 100%;
            }

            .related-card .card-body { padding: 18px; }
            .faq-item { padding: 6px 18px; }
            .faq-item summary { font-size: 15px; }
        }

/* roulang page: category2 */
/* ============ 设计变量 ============ */
        :root {
            --primary: #1857e8;
            --primary-dark: #0e3c9d;
            --primary-light: #e8effd;
            --accent: #f7a83a;
            --accent-dark: #e68a12;
            --bg-body: #f4f7fb;
            --bg-alt: #eef3fa;
            --white: #ffffff;
            --text-main: #1e2a3a;
            --text-weak: #64748b;
            --border: #e3eaf2;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --shadow: 0 10px 30px rgba(15, 60, 120, 0.08);
            --shadow-hover: 0 18px 42px rgba(15, 60, 120, 0.16);
            --transition: all 0.25s ease;
        }

        /* ============ 基础 Reset / Base ============ */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            margin: 0;
            font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            color: var(--text-main);
            background: var(--bg-body);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        ul,
        ol {
            margin: 0;
            padding: 0;
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6,
        p {
            margin: 0;
        }

        /* ============ 容器 ============ */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .container-wide {
            max-width: 1360px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ============ 通用组件 ============ */
        .section {
            padding: 80px 0;
        }

        .section-alt {
            background: var(--bg-alt);
        }

        .section-head {
            max-width: 720px;
            margin: 0 auto 48px;
            text-align: center;
        }

        .section-head .section-eyebrow {
            display: inline-block;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 2px;
            color: var(--primary);
            background: var(--primary-light);
            padding: 6px 18px;
            border-radius: 30px;
            margin-bottom: 14px;
        }

        .section-head h2 {
            font-size: 34px;
            line-height: 1.25;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .section-head p {
            color: var(--text-weak);
            font-size: 16px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: 50px;
            border: none;
            font-weight: 600;
            font-size: 15px;
            cursor: pointer;
            transition: var(--transition);
            background: var(--primary);
            color: #fff;
            box-shadow: 0 6px 18px rgba(24, 87, 232, 0.25);
        }

        .btn:hover {
            background: var(--primary-dark);
            box-shadow: 0 10px 24px rgba(24, 87, 232, 0.32);
            transform: translateY(-2px);
        }

        .btn:focus-visible {
            outline: 3px solid rgba(24, 87, 232, 0.45);
            outline-offset: 2px;
        }

        .btn-accent {
            background: var(--accent);
            color: #1e2a3a;
            box-shadow: 0 6px 18px rgba(247, 168, 58, 0.3);
        }

        .btn-accent:hover {
            background: var(--accent-dark);
            color: #fff;
        }

        .btn-outline {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.75);
            box-shadow: none;
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            box-shadow: none;
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 8px 20px;
            font-size: 14px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 30px;
            white-space: nowrap;
        }

        .badge-orange {
            background: rgba(247, 168, 58, 0.12);
            color: #c7740a;
        }

        .tag {
            display: inline-block;
            font-size: 13px;
            padding: 5px 16px;
            border-radius: 6px;
            background: #f1f5f9;
            color: var(--text-weak);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .tag:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: rgba(24, 87, 232, 0.25);
        }

        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 14px;
            color: var(--primary);
            transition: var(--transition);
        }

        .card-link i {
            transition: transform 0.25s ease;
        }

        .card-link:hover {
            color: var(--primary-dark);
        }

        .card-link:hover i {
            transform: translateX(4px);
        }

        /* ============ 顶栏 / 导航 ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 12px rgba(15, 60, 120, 0.05);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 76px;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-icon {
            width: 42px;
            height: 42px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary) 0%, #3d7cff 100%);
            color: #fff;
            border-radius: 12px;
            font-size: 18px;
            box-shadow: 0 6px 16px rgba(24, 87, 232, 0.25);
        }

        .brand-text {
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 0.5px;
            color: var(--text-main);
            white-space: nowrap;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border: none;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 10px;
            font-size: 18px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
        }

        .nav-toggle:focus-visible {
            outline: 3px solid rgba(24, 87, 232, 0.4);
            outline-offset: 2px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-menu .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 9px 18px;
            border-radius: 30px;
            font-weight: 500;
            font-size: 15px;
            color: var(--text-main);
            transition: var(--transition);
            position: relative;
        }

        .nav-menu .nav-link:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        .nav-menu .nav-link.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 6px 16px rgba(24, 87, 232, 0.24);
        }

        .nav-menu .nav-link:focus-visible {
            outline: 3px solid rgba(24, 87, 232, 0.4);
            outline-offset: 2px;
        }

        .nav-cta {
            display: inline-flex;
        }

        /* ============ 页面 Banner ============ */
        .page-hero {
            position: relative;
            background-image: url("/assets/images/backpic/back-2.png");
            background-size: cover;
            background-position: center;
            padding: 96px 0 84px;
            color: #fff;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(13, 34, 68, 0.85) 20%, rgba(18, 55, 110, 0.7) 60%, rgba(24, 87, 232, 0.35) 100%);
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 28px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
        }

        .breadcrumb a:hover {
            color: #fff;
        }

        .breadcrumb i {
            font-size: 12px;
        }

        .page-hero h1 {
            font-size: 42px;
            line-height: 1.2;
            font-weight: 800;
            margin-bottom: 18px;
            max-width: 680px;
        }

        .page-hero .hero-lead {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.88);
            max-width: 640px;
            margin-bottom: 28px;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 30px;
        }

        .hero-tags {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .hero-tags .tag {
            background: rgba(255, 255, 255, 0.14);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.25);
            backdrop-filter: blur(4px);
        }

        .hero-tags .tag:hover {
            background: rgba(255, 255, 255, 0.24);
            color: #fff;
        }

        /* ============ 帮助分类卡片 ============ */
        .help-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            height: 100%;
            box-shadow: var(--shadow);
            transition: var(--transition);
            margin-bottom: 20px;
        }

        .help-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-6px);
            border-color: rgba(24, 87, 232, 0.24);
        }

        .help-card-icon {
            width: 56px;
            height: 56px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 14px;
            font-size: 22px;
            margin-bottom: 18px;
            transition: var(--transition);
        }

        .help-card:hover .help-card-icon {
            background: var(--primary);
            color: #fff;
        }

        .help-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .help-card p {
            color: var(--text-weak);
            font-size: 14px;
            line-height: 1.75;
            margin-bottom: 16px;
        }

        /* ============ 新手步骤 ============ */
        .steps-panel {
            background: var(--white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            padding: 44px 40px;
        }

        .steps-list {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 24px;
            counter-reset: step-counter;
        }

        .step-item {
            position: relative;
            text-align: left;
            padding: 28px 18px 20px;
            background: var(--bg-body);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .step-item:hover {
            border-color: rgba(24, 87, 232, 0.3);
            box-shadow: var(--shadow);
        }

        .step-item .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            font-weight: 700;
            font-size: 16px;
            margin-bottom: 14px;
            box-shadow: 0 6px 14px rgba(24, 87, 232, 0.26);
        }

        .step-item h3 {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .step-item p {
            font-size: 13px;
            color: var(--text-weak);
            line-height: 1.7;
        }

        /* ============ 内容列表 / 摘要边栏 ============ */
        .article-card {
            display: flex;
            gap: 20px;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
            margin-bottom: 24px;
        }

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

        .article-thumb {
            flex: 0 0 200px;
            max-width: 200px;
            position: relative;
            overflow: hidden;
            min-height: 170px;
        }

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

        .article-card:hover .article-thumb img {
            transform: scale(1.05);
        }

        .article-body {
            padding: 24px 22px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            flex: 1;
        }

        .article-body .badge {
            align-self: flex-start;
            margin-bottom: 10px;
        }

        .article-body h3 {
            font-size: 19px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .article-body p {
            color: var(--text-weak);
            font-size: 14px;
            line-height: 1.75;
            margin-bottom: 12px;
        }

        /* 摘要边栏 */
        .quick-sidebar {
            background: linear-gradient(145deg, #0f2046 0%, #1b3c7a 100%);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            color: #fff;
            box-shadow: var(--shadow);
            height: 100%;
            margin-bottom: 20px;
        }

        .quick-sidebar h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .quick-sidebar p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 22px;
        }

        .quick-list {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .quick-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 8px;
            border-radius: 10px;
            color: rgba(255, 255, 255, 0.88);
            font-size: 15px;
            transition: var(--transition);
        }

        .quick-list a i {
            width: 20px;
            color: var(--accent);
        }

        .quick-list a:hover {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            transform: translateX(4px);
        }

        /* ============ FAQ ============ */
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .faq-item.active {
            border-color: rgba(24, 87, 232, 0.25);
            box-shadow: var(--shadow-hover);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            background: transparent;
            border: none;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
            transition: var(--transition);
        }

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

        .faq-question:focus-visible {
            outline: 3px solid rgba(24, 87, 232, 0.4);
            outline-offset: -3px;
        }

        .faq-icon {
            flex-shrink: 0;
            width: 30px;
            height: 30px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            font-size: 13px;
            transition: var(--transition);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            padding: 0 24px;
            color: var(--text-weak);
            font-size: 15px;
            line-height: 1.8;
            transition: max-height 0.35s ease, padding 0.35s ease;
        }

        .faq-item.active .faq-answer {
            max-height: 320px;
            padding: 0 24px 22px;
        }

        /* ============ CTA ============ */
        .cta-section {
            background-image: url("/assets/images/backpic/back-3.png");
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 90px 0;
            color: #fff;
            text-align: center;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(12, 28, 58, 0.9) 30%, rgba(24, 87, 232, 0.75) 100%);
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .cta-section p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin: 0 auto 30px;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background: #0d1b36;
            color: #b7c3d9;
            padding: 64px 0 24px;
        }

        .footer-grid {
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }

        .footer-brand .brand-icon {
            width: 38px;
            height: 38px;
            font-size: 16px;
        }

        .footer-brand .brand-text {
            color: #fff;
            font-size: 18px;
            font-weight: 700;
        }

        .footer-about {
            font-size: 14px;
            line-height: 1.8;
            color: #8c9abc;
            max-width: 340px;
        }

        .footer-title {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 8px;
        }

        .footer-title::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 3px;
            background: var(--accent);
            border-radius: 3px;
        }

        .footer-menu {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-menu a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: #8c9abc;
            font-size: 14px;
            transition: var(--transition);
        }

        .footer-menu a i {
            font-size: 12px;
        }

        .footer-menu a:hover {
            color: #fff;
            transform: translateX(4px);
        }

        .footer-contact {
            display: flex;
            flex-direction: column;
            gap: 10px;
            font-size: 14px;
            color: #8c9abc;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-contact i {
            color: var(--accent);
            width: 18px;
            text-align: center;
        }

        .footer-bottom {
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: #5c6c8c;
        }

        /* ============ 动画 ============ */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .page-hero .container {
            animation: fadeInUp 0.6s ease both;
        }

        /* ============ 响应式断点 ============ */
        @media (max-width: 1024px) {
            .section {
                padding: 64px 0;
            }

            .steps-list {
                grid-template-columns: repeat(3, 1fr);
                gap: 18px;
            }

            .steps-panel {
                padding: 34px 30px;
            }

            .article-thumb {
                flex: 0 0 170px;
                max-width: 170px;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: inline-flex;
            }

            .main-nav {
                position: fixed;
                top: 76px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 18px 24px 24px;
                box-shadow: 0 18px 30px rgba(15, 60, 120, 0.12);
                display: none;
                max-height: calc(100vh - 76px);
                overflow-y: auto;
                z-index: 200;
            }

            .main-nav.open {
                display: block;
            }

            .nav-menu {
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                margin-bottom: 14px;
            }

            .nav-menu .nav-link {
                padding: 13px 18px;
                justify-content: flex-start;
                border-radius: 10px;
            }

            .nav-cta {
                justify-content: center;
                width: 100%;
            }

            .page-hero {
                padding: 72px 0 64px;
            }

            .page-hero h1 {
                font-size: 32px;
            }

            .steps-list {
                grid-template-columns: repeat(2, 1fr);
            }

            .section-head h2 {
                font-size: 28px;
            }

            .article-card {
                flex-direction: column;
            }

            .article-thumb {
                flex: none;
                max-width: 100%;
                min-height: 180px;
                width: 100%;
            }

            .footer-grid .cell {
                margin-bottom: 20px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 18px;
            }

            .section {
                padding: 50px 0;
            }

            .brand-text {
                font-size: 17px;
            }

            .brand-icon {
                width: 38px;
                height: 38px;
                font-size: 16px;
            }

            .page-hero h1 {
                font-size: 26px;
            }

            .page-hero .hero-lead {
                font-size: 15px;
            }

            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }

            .steps-list {
                grid-template-columns: 1fr;
            }

            .steps-panel {
                padding: 24px 20px;
            }

            .help-card {
                padding: 24px 20px;
            }

            .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }

            .faq-answer {
                padding: 0 18px;
            }

            .faq-item.active .faq-answer {
                padding: 0 18px 18px;
            }

            .cta-section {
                padding: 64px 0;
            }

            .cta-section h2 {
                font-size: 26px;
            }

            .cta-actions .btn {
                width: 100%;
                justify-content: center;
            }
        }