/* roulang page: index */
:root {
            --brand: #00E5A0;
            --brand-hover: #00C489;
            --brand-light: #33EBB3;
            --accent: #FFB800;
            --accent-light: #FFD34D;
            --bg-900: #0B1E26;
            --bg-800: #102C37;
            --bg-700: #163A47;
            --card-bg: rgba(15, 43, 51, 0.85);
            --text-100: #F2F7F5;
            --text-200: #9FB8B0;
            --text-300: #5C7A72;
            --border-color: rgba(0, 229, 160, 0.12);
            --border-color-hover: rgba(0, 229, 160, 0.35);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 8px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.25);
            --shadow-btn: 0 6px 20px rgba(0, 229, 160, 0.25);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.35);
            --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
            --transition-base: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-900);
            color: var(--text-100);
            line-height: 1.8;
            font-size: 16px;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--text-100);
            text-decoration: none;
            transition: var(--transition-base);
        }

        a:hover {
            color: var(--brand);
        }

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

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.02em;
        }

        .section-padding {
            padding: 80px 0;
        }

        .section-title {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--text-100);
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-200);
            margin-bottom: 40px;
        }

        /* ===== 按钮 ===== */
        .btn-brand {
            background: var(--brand);
            color: #0B1E26;
            font-weight: 700;
            border-radius: 12px;
            padding: 12px 28px;
            border: none;
            box-shadow: var(--shadow-btn);
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            line-height: 1.6;
        }

        .btn-brand:hover {
            background: var(--brand-light);
            color: #0B1E26;
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 229, 160, 0.35);
        }

        .btn-brand:focus {
            outline: 2px solid var(--brand-light);
            outline-offset: 2px;
        }

        .btn-outline-brand {
            background: transparent;
            color: var(--brand);
            border: 1px solid var(--brand);
            font-weight: 600;
            border-radius: 12px;
            padding: 12px 28px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition-base);
            font-size: 15px;
            line-height: 1.6;
        }

        .btn-outline-brand:hover {
            background: rgba(0, 229, 160, 0.1);
            color: var(--brand);
            transform: translateY(-2px);
        }

        .btn-brand:active,
        .btn-outline-brand:active {
            transform: scale(0.98);
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 30, 38, 0.85);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border-color);
            padding: 14px 0;
            transition: var(--transition-base);
        }

        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-100);
        }

        .site-header .navbar-brand .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--brand);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            color: #0B1E26;
            font-size: 16px;
        }

        .site-header .navbar-brand span.brand-name {
            color: var(--brand);
        }

        .nav-chips {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
        }

        .nav-chips::-webkit-scrollbar {
            display: none;
        }

        .nav-chips .chip {
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            background: var(--bg-700);
            color: var(--text-200);
            font-size: 14px;
            font-weight: 500;
            white-space: nowrap;
            transition: var(--transition-base);
            border: 1px solid transparent;
        }

        .nav-chips .chip:hover {
            color: var(--brand);
            border-color: var(--border-color-hover);
            background: rgba(0, 229, 160, 0.08);
        }

        .nav-chips .chip.active {
            background: var(--brand);
            color: #0B1E26;
            font-weight: 700;
        }

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-cta .btn-brand {
            padding: 8px 20px;
            font-size: 14px;
            border-radius: 10px;
            box-shadow: none;
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            color: var(--text-100);
            padding: 6px 10px;
            font-size: 20px;
            line-height: 1;
        }

        @media (max-width: 991px) {
            .nav-chips-wrapper {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--bg-800);
                padding: 12px 20px;
                display: none;
                border-bottom: 1px solid var(--border-color);
            }
            .nav-chips-wrapper.open {
                display: block;
            }
            .nav-chips {
                flex-wrap: nowrap;
                overflow-x: auto;
            }
            .mobile-toggle {
                display: inline-flex;
            }
        }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            background: linear-gradient(135deg, rgba(11, 30, 38, 0.95) 0%, rgba(11, 30, 38, 0.82) 50%, rgba(11, 30, 38, 0.45) 100%),
                url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            padding: 120px 0 80px;
        }

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

        .hero h1 {
            font-size: 52px;
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 20px;
            background: linear-gradient(135deg, var(--brand) 0%, #B3FFE0 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-lead {
            font-size: 19px;
            color: var(--text-200);
            max-width: 560px;
            margin-bottom: 32px;
            line-height: 1.7;
        }

        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 40px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(0, 229, 160, 0.15);
            border: 1px solid var(--border-color);
            border-radius: 999px;
            padding: 10px 20px;
            backdrop-filter: blur(4px);
        }

        .hero-badge .badge-num {
            font-size: 20px;
            font-weight: 800;
            color: var(--accent);
            font-variant-numeric: tabular-nums;
        }

        .hero-badge .badge-label {
            font-size: 12px;
            color: var(--text-200);
        }

        .hero-badge .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--brand);
            flex-shrink: 0;
            animation: pulse 1.5s infinite;
        }

        @keyframes pulse {
            0%,
            100% {
                opacity: 1;
                box-shadow: 0 0 0 0 rgba(0, 229, 160, 0.5);
            }
            50% {
                opacity: 0.7;
                box-shadow: 0 0 0 6px rgba(0, 229, 160, 0);
            }
        }

        .hero-scroll {
            position: absolute;
            bottom: 30px;
            left: 50%;
            transform: translateX(-50%);
            color: var(--text-300);
            font-size: 24px;
            animation: bounce 2s infinite;
            z-index: 2;
        }

        @keyframes bounce {
            0%,
            100% {
                transform: translateX(-50%) translateY(0);
            }
            50% {
                transform: translateX(-50%) translateY(10px);
            }
        }

        /* ===== 玩法介绍 ===== */
        .gameplay-section {
            background: linear-gradient(180deg, var(--bg-900) 0%, var(--bg-800) 100%);
            position: relative;
        }

        .gameplay-tabs {
            display: flex;
            gap: 8px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }

        .gameplay-tab-btn {
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            background: var(--bg-700);
            border: 1px solid transparent;
            color: var(--text-200);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition-base);
            font-size: 15px;
        }

        .gameplay-tab-btn:hover {
            color: var(--brand);
            border-color: var(--border-color-hover);
        }

        .gameplay-tab-btn.active {
            background: var(--brand);
            color: #0B1E26;
            border-color: var(--brand);
        }

        .gameplay-content {
            display: none;
        }

        .gameplay-content.active {
            display: block;
            animation: fadeIn 0.4s ease;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(12px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .gameplay-card {
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            height: 100%;
            transition: var(--transition-base);
        }

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

        .gameplay-card img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            display: block;
        }

        .gameplay-card-body {
            padding: 28px;
        }

        .gameplay-card-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-100);
        }

        .gameplay-card-body p {
            color: var(--text-200);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 0;
        }

        .step-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: rgba(0, 229, 160, 0.15);
            color: var(--brand);
            font-weight: 700;
            font-size: 15px;
            margin-bottom: 16px;
        }

        /* ===== 奖励预览 ===== */
        .rewards-section {
            background: linear-gradient(0deg, var(--bg-900) 0%, var(--bg-800) 100%);
        }

        .reward-card {
            border-radius: var(--radius-lg);
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            padding: 32px;
            height: 100%;
            position: relative;
            overflow: hidden;
            transition: var(--transition-base);
        }

        .reward-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-color-hover);
        }

        .reward-card.featured {
            border-color: var(--accent);
            box-shadow: 0 8px 30px rgba(255, 184, 0, 0.12);
        }

        .reward-card.featured::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), var(--accent-light));
        }

        .reward-card.featured:hover {
            box-shadow: 0 12px 40px rgba(255, 184, 0, 0.2);
        }

        .reward-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: rgba(0, 229, 160, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 20px;
            color: var(--brand);
        }

        .reward-card.featured .reward-icon {
            background: rgba(255, 184, 0, 0.15);
            color: var(--accent);
        }

        .reward-value {
            font-size: 40px;
            font-weight: 800;
            color: var(--accent);
            font-variant-numeric: tabular-nums;
            line-height: 1;
            margin-bottom: 8px;
        }

        .reward-name {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-100);
            margin-bottom: 12px;
        }

        .reward-desc {
            font-size: 14px;
            color: var(--text-200);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .reward-tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: var(--radius-sm);
            background: rgba(0, 229, 160, 0.1);
            color: var(--brand);
            font-size: 12px;
            font-weight: 600;
        }

        /* ===== 任务进度 ===== */
        .missions-section {
            background: linear-gradient(180deg, var(--bg-800) 0%, var(--bg-900) 100%);
        }

        .mission-card {
            border-radius: var(--radius-lg);
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            padding: 36px;
        }

        .progress-ring {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .progress-ring svg {
            transform: rotate(-90deg);
        }

        .progress-ring .ring-text {
            transform: rotate(90deg);
            transform-origin: center;
        }

        .mission-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .mission-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .mission-item:last-child {
            border-bottom: none;
        }

        .mission-check {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 2px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand);
            font-size: 14px;
            flex-shrink: 0;
        }

        .mission-check.done {
            background: var(--brand);
            border-color: var(--brand);
            color: #0B1E26;
        }

        .mission-check.pending {
            border-color: var(--accent);
            color: var(--accent);
        }

        .mission-info {
            flex: 1;
        }

        .mission-name {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-100);
        }

        .mission-reward {
            font-size: 13px;
            color: var(--accent);
            font-weight: 600;
            font-variant-numeric: tabular-nums;
        }

        .mission-done-label {
            font-size: 12px;
            color: var(--brand);
            font-weight: 600;
        }

        .mission-progress-bar {
            width: 100%;
            height: 6px;
            background: var(--bg-700);
            border-radius: 999px;
            overflow: hidden;
            margin-top: 20px;
        }

        .mission-progress-bar .fill {
            height: 100%;
            background: linear-gradient(90deg, var(--brand), var(--brand-light));
            border-radius: 999px;
        }

        /* ===== 最新资讯 ===== */
        .news-section {
            background: var(--bg-900);
        }

        .news-card {
            border-radius: var(--radius-md);
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: var(--transition-base);
            position: relative;
        }

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

        .news-card::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--brand);
            opacity: 0;
            transition: var(--transition-base);
        }

        .news-card:hover::before {
            opacity: 1;
        }

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

        .news-cat {
            display: inline-block;
            padding: 4px 12px;
            border-radius: var(--radius-sm);
            background: rgba(0, 229, 160, 0.1);
            color: var(--brand);
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 12px;
            align-self: flex-start;
        }

        .news-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-100);
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-desc {
            font-size: 14px;
            color: var(--text-200);
            line-height: 1.6;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .news-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-300);
        }

        .news-link {
            color: var(--brand);
            font-weight: 600;
        }

        .news-link:hover {
            color: var(--brand-light);
        }

        .news-empty {
            background: var(--bg-700);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 60px 20px;
            text-align: center;
            color: var(--text-300);
        }

        .news-empty i {
            font-size: 48px;
            display: block;
            margin-bottom: 16px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: linear-gradient(180deg, var(--bg-900) 0%, var(--bg-800) 100%);
        }

        .faq-accordion .accordion-item {
            background: var(--bg-700);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            overflow: hidden;
        }

        .faq-accordion .accordion-button {
            background: transparent;
            color: var(--text-100);
            font-weight: 600;
            font-size: 16px;
            padding: 20px 24px;
            box-shadow: none;
            transition: var(--transition-base);
            border: none;
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            color: var(--brand);
            background: rgba(0, 229, 160, 0.04);
        }

        .faq-accordion .accordion-button:hover {
            color: var(--brand);
        }

        .faq-accordion .accordion-button::after {
            display: none;
        }

        .faq-accordion .accordion-button .faq-icon {
            margin-left: auto;
            font-size: 18px;
            color: var(--text-300);
            transition: var(--transition-base);
            flex-shrink: 0;
        }

        .faq-accordion .accordion-button:not(.collapsed) .faq-icon {
            transform: rotate(45deg);
            color: var(--brand);
        }

        .faq-accordion .accordion-body {
            padding: 0 24px 20px;
            color: var(--text-200);
            font-size: 15px;
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-band {
            position: relative;
            padding: 70px 0;
            background: linear-gradient(135deg, var(--bg-800) 0%, var(--bg-700) 100%);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            text-align: center;
        }

        .cta-band h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-100);
            margin-bottom: 12px;
        }

        .cta-band p {
            color: var(--text-200);
            margin-bottom: 28px;
            font-size: 16px;
        }

        .cta-band .btn-brand {
            padding: 16px 40px;
            font-size: 17px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-800);
            border-top: 1px solid var(--border-color);
            padding: 50px 0 20px;
        }

        .footer-brand {
            font-size: 24px;
            font-weight: 800;
            color: var(--text-100);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-brand .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--brand);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            color: #0B1E26;
            font-size: 15px;
        }

        .footer-brand span.brand-name {
            color: var(--brand);
        }

        .footer-desc {
            color: var(--text-300);
            font-size: 14px;
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-100);
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

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

        .footer-links a {
            color: var(--text-200);
            font-size: 14px;
            transition: var(--transition-base);
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            margin-top: 40px;
            padding-top: 20px;
            text-align: center;
            color: var(--text-300);
            font-size: 13px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991px) {
            .section-padding {
                padding: 60px 0;
            }
            .hero {
                min-height: 70vh;
                padding: 100px 0 60px;
            }
            .hero h1 {
                font-size: 40px;
            }
            .section-title {
                font-size: 30px;
            }
            .cta-band h2 {
                font-size: 28px;
            }
            .navbar-brand .brand-name {
                font-size: 18px;
            }
        }

        @media (max-width: 767px) {
            .section-padding {
                padding: 48px 0;
            }
            .hero {
                min-height: auto;
                padding: 100px 0 50px;
            }
            .hero h1 {
                font-size: 30px;
            }
            .hero-lead {
                font-size: 16px;
            }
            .hero-badges {
                gap: 8px;
            }
            .hero-badge {
                padding: 8px 14px;
            }
            .section-title {
                font-size: 26px;
            }
            .gameplay-tabs {
                flex-wrap: nowrap;
                overflow-x: auto;
                padding-bottom: 8px;
                -webkit-overflow-scrolling: touch;
            }
            .gameplay-tab-btn {
                white-space: nowrap;
                padding: 10px 18px;
            }
            .mission-item {
                gap: 12px;
            }
            .progress-ring svg {
                width: 100px;
                height: 100px;
            }
            .footer-col {
                margin-bottom: 30px;
            }
            .cta-band .btn-brand {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 350px) {
            .container {
                padding-left: 14px;
                padding-right: 14px;
            }
            .hero-badge {
                padding: 6px 10px;
                font-size: 11px;
            }
            .hero-badge .badge-num {
                font-size: 16px;
            }
            .news-card-body {
                padding: 18px;
            }
            .reward-card {
                padding: 24px;
            }
            .mission-card {
                padding: 24px;
            }
            .btn-brand,
            .btn-outline-brand {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --brand: #00E5A0;
            --brand-hover: #00C489;
            --brand-disabled: rgba(0, 229, 160, 0.5);
            --accent: #FFB800;
            --bg-900: #0B1E26;
            --bg-800: #102C37;
            --bg-700: #163A47;
            --card-bg: rgba(15, 43, 51, 0.85);
            --text-100: #F2F7F5;
            --text-200: #9FB8B0;
            --text-300: #5C7A72;
            --border-color: rgba(0, 229, 160, 0.12);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 8px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.25);
            --shadow-btn: 0 6px 20px rgba(0, 229, 160, 0.25);
            --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background: var(--bg-900);
            color: var(--text-100);
            line-height: 1.8;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

        a:hover {
            color: var(--brand);
        }

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

        ul,
        ol {
            list-style: none;
        }

        button {
            cursor: pointer;
            background: none;
            border: none;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ===== 区块通用 ===== */
        .section {
            padding: 80px 0;
        }

        .section-title {
            font-size: 36px;
            font-weight: 800;
            letter-spacing: 0.5px;
            line-height: 1.25;
            margin-bottom: 12px;
            color: var(--text-100);
        }

        .section-subtitle {
            font-size: 18px;
            color: var(--text-200);
            margin-bottom: 44px;
            max-width: 640px;
        }

        .text-brand {
            color: var(--brand);
        }

        .text-accent {
            color: var(--accent);
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 14px;
            font-weight: 700;
            font-size: 16px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-brand {
            background: var(--brand);
            color: #0B1E26 !important;
            box-shadow: var(--shadow-btn);
        }

        .btn-brand:hover {
            background: #33EBB3;
            color: #0B1E26 !important;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 229, 160, 0.35);
        }

        .btn-brand:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 229, 160, 0.4), 0 6px 20px rgba(0, 229, 160, 0.25);
        }

        .btn-outline {
            background: transparent;
            border: 1px solid var(--brand);
            color: var(--brand);
        }

        .btn-outline:hover {
            background: rgba(0, 229, 160, 0.1);
            color: var(--brand);
            transform: translateY(-2px);
        }

        .btn-outline:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 229, 160, 0.25);
        }

        /* ===== 顶部导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1030;
            background: rgba(11, 30, 38, 0.88);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            height: 72px;
        }

        .site-header .container {
            height: 100%;
        }

        .site-header .navbar {
            height: 100%;
            min-height: 0;
            display: flex;
            align-items: center;
            flex-wrap: nowrap;
            padding: 0;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0;
            margin-right: 28px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--brand);
            color: #0B1E26;
            font-weight: 800;
            border-radius: 10px;
            font-size: 14px;
            letter-spacing: -0.5px;
            line-height: 1;
            flex-shrink: 0;
        }

        .brand-name {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-100);
            letter-spacing: 1px;
            line-height: 1.2;
        }

        .nav-chips-wrapper {
            display: flex;
            align-items: center;
            flex: 1;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .nav-chips-wrapper::-webkit-scrollbar {
            display: none;
        }

        .nav-chips {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0;
            padding: 0;
            list-style: none;
            white-space: nowrap;
        }

        .nav-chips li a.chip {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            background: var(--bg-700);
            color: var(--text-200);
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
            border: 1px solid transparent;
            line-height: 1.4;
        }

        .nav-chips li a.chip:hover {
            background: rgba(0, 229, 160, 0.12);
            border-color: rgba(0, 229, 160, 0.25);
            color: var(--brand);
        }

        .nav-chips li a.chip.active {
            background: var(--brand);
            color: #0B1E26;
            font-weight: 700;
            border-color: var(--brand);
        }

        .nav-cta {
            margin-left: 16px;
            flex-shrink: 0;
        }

        .nav-cta .btn {
            padding: 9px 20px;
            font-size: 14px;
            border-radius: 12px;
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-100);
            width: 42px;
            height: 42px;
            border-radius: 12px;
            font-size: 20px;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: var(--transition);
        }

        .mobile-toggle:hover {
            border-color: var(--brand);
            color: var(--brand);
        }

        /* ===== 页面横幅 ===== */
        .page-banner {
            position: relative;
            padding: 150px 0 80px;
            background: linear-gradient(135deg, rgba(11, 30, 38, 0.92), rgba(16, 44, 55, 0.78)), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
            border-bottom: 1px solid var(--border-color);
        }

        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-300);
            margin-bottom: 20px;
        }

        .breadcrumb-custom a {
            color: var(--text-300);
        }

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

        .breadcrumb-custom .sep {
            color: var(--text-300);
            font-size: 12px;
        }

        .breadcrumb-custom .current {
            color: var(--brand);
            font-weight: 600;
        }

        .page-banner h1 {
            font-size: 48px;
            font-weight: 800;
            color: var(--text-100);
            margin-bottom: 14px;
            line-height: 1.2;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .page-banner h1 .deco {
            color: var(--accent);
            font-size: 36px;
            line-height: 1;
        }

        .page-banner .banner-desc {
            font-size: 18px;
            color: var(--text-200);
            max-width: 660px;
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== 两栏图文介绍 ===== */
        .intro-section {
            padding: 90px 0;
            background: var(--bg-900);
            position: relative;
        }

        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 52px;
            align-items: center;
        }

        .intro-media {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
        }

        .intro-media img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }

        .intro-media::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 30, 38, 0), rgba(11, 30, 38, 0.25));
            pointer-events: none;
        }

        .intro-content .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--brand);
            font-size: 14px;
            font-weight: 700;
            letter-spacing: 1px;
            margin-bottom: 16px;
            background: rgba(0, 229, 160, 0.1);
            padding: 6px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
        }

        .intro-content .intro-title {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 18px;
            color: var(--text-100);
        }

        .intro-content p {
            color: var(--text-200);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 12px;
        }

        .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            margin: 24px 0;
        }

        .intro-feature {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-100);
            background: var(--bg-700);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            transition: var(--transition);
        }

        .intro-feature:hover {
            border-color: rgba(0, 229, 160, 0.3);
        }

        .intro-feature i {
            color: var(--brand);
            font-size: 16px;
            flex-shrink: 0;
        }

        /* ===== 步骤说明 ===== */
        .steps-section {
            padding: 90px 0;
            background: linear-gradient(180deg, var(--bg-900), var(--bg-800));
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .step-card {
            position: relative;
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            height: 100%;
            transition: var(--transition);
            overflow: hidden;
        }

        .step-card::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--brand);
            opacity: 0;
            transition: var(--transition);
        }

        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
            border-color: rgba(0, 229, 160, 0.3);
        }

        .step-card:hover::before {
            opacity: 1;
        }

        .step-number {
            font-size: 14px;
            font-weight: 800;
            color: var(--accent);
            margin-bottom: 14px;
            display: block;
            letter-spacing: 1px;
        }

        .step-icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 229, 160, 0.12);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            color: var(--brand);
            font-size: 22px;
            margin-bottom: 16px;
        }

        .step-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-100);
            line-height: 1.4;
        }

        .step-card p {
            font-size: 14px;
            color: var(--text-200);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 90px 0;
            background: var(--bg-900);
        }

        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }

        .accordion-item {
            background: var(--bg-700) !important;
            border: 1px solid var(--border-color) !important;
            border-radius: var(--radius-md) !important;
            margin-bottom: 16px;
            overflow: hidden;
        }

        .accordion-button {
            background: var(--bg-700);
            color: var(--text-100);
            font-size: 16px;
            font-weight: 600;
            padding: 20px 24px;
            box-shadow: none !important;
            border-radius: var(--radius-md) !important;
            transition: var(--transition);
        }

        .accordion-button:hover {
            color: var(--brand);
        }

        .accordion-button:not(.collapsed) {
            background: var(--bg-700);
            color: var(--brand);
            font-weight: 700;
        }

        .accordion-button::after {
            filter: invert(1) brightness(1.5);
            transition: var(--transition);
        }

        .accordion-button:not(.collapsed)::after {
            filter: invert(0.7) sepia(1) saturate(5) hue-rotate(100deg);
        }

        .accordion-body {
            background: var(--bg-700);
            color: var(--text-200);
            padding: 0 24px 22px;
            font-size: 15px;
            line-height: 1.8;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 100px 0;
            position: relative;
            background: linear-gradient(135deg, rgba(11, 30, 38, 0.92), rgba(22, 58, 71, 0.82)), url('/assets/images/backpic/back-3.webp') center / cover no-repeat;
            text-align: center;
            border-top: 1px solid var(--border-color);
        }

        .cta-inner {
            max-width: 720px;
            margin: 0 auto;
        }

        .cta-section h2 {
            font-size: 38px;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--text-100);
            line-height: 1.25;
        }

        .cta-section p {
            color: var(--text-200);
            font-size: 18px;
            margin-bottom: 36px;
            line-height: 1.7;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-800);
            padding: 70px 0 30px;
            border-top: 1px solid var(--border-color);
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-desc {
            color: var(--text-200);
            font-size: 14px;
            line-height: 1.7;
            max-width: 340px;
            margin-bottom: 0;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-100);
            margin-bottom: 16px;
        }

        .footer-links {
            margin: 0;
            padding: 0;
            list-style: none;
        }

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

        .footer-links a {
            color: var(--text-300);
            font-size: 14px;
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            margin-top: 44px;
            text-align: center;
            color: var(--text-300);
            font-size: 13px;
            letter-spacing: 0.5px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991.98px) {
            .site-header {
                height: auto;
                min-height: 72px;
            }

            .site-header .navbar {
                flex-wrap: wrap;
                padding: 12px 0;
                gap: 8px;
            }

            .mobile-toggle {
                display: flex;
                margin-left: auto;
            }

            .nav-chips-wrapper {
                display: none;
                width: 100%;
                order: 3;
                border-top: 1px solid var(--border-color);
                padding-top: 12px;
                margin-top: 4px;
                flex: 0 0 100%;
            }

            .nav-chips-wrapper.open {
                display: flex;
            }

            .nav-chips {
                flex-wrap: nowrap;
                overflow-x: auto;
                padding-bottom: 6px;
                gap: 8px;
            }

            .nav-chips li a.chip {
                padding: 8px 14px;
                font-size: 14px;
            }

            .nav-cta {
                display: none;
            }

            .page-banner {
                padding: 130px 0 64px;
            }

            .intro-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .intro-media img {
                height: 320px;
            }

            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .cta-section {
                padding: 72px 0;
            }
        }

        @media (max-width: 767.98px) {
            .section {
                padding: 56px 0;
            }

            .section-title {
                font-size: 28px;
                margin-bottom: 10px;
            }

            .section-subtitle {
                font-size: 16px;
                margin-bottom: 32px;
            }

            .page-banner {
                padding: 110px 0 48px;
            }

            .page-banner h1 {
                font-size: 30px;
            }

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

            .page-banner .banner-desc {
                font-size: 16px;
            }

            .intro-section {
                padding: 56px 0;
            }

            .intro-content .intro-title {
                font-size: 26px;
            }

            .intro-features {
                grid-template-columns: 1fr;
            }

            .steps-section {
                padding: 56px 0;
            }

            .faq-section {
                padding: 56px 0;
            }

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

            .cta-section p {
                font-size: 16px;
            }

            .site-footer {
                padding: 48px 0 24px;
            }

            .footer-bottom {
                margin-top: 32px;
            }
        }

        @media (max-width: 575.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

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

            .nav-chips li a.chip {
                padding: 7px 12px;
                font-size: 13px;
            }

            .brand-name {
                font-size: 18px;
            }

            .logo-icon {
                width: 36px;
                height: 36px;
                font-size: 12px;
                border-radius: 8px;
            }

            .btn {
                padding: 11px 22px;
                font-size: 15px;
                width: 100%;
            }

            .nav-cta .btn {
                width: auto;
            }

            .intro-media img {
                height: 240px;
            }

            .page-banner h1 {
                font-size: 26px;
                flex-wrap: wrap;
            }

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

/* roulang page: article */
:root {
            --brand: #00E5A0;
            --brand-hover: #00C489;
            --accent: #FFB800;
            --bg-900: #0B1E26;
            --bg-800: #102C37;
            --bg-700: #163A47;
            --card-bg: rgba(15, 43, 51, 0.85);
            --text-100: #F2F7F5;
            --text-200: #9FB8B0;
            --text-300: #5C7A72;
            --border-color: rgba(0, 229, 160, 0.12);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 8px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.25);
            --shadow-btn: 0 6px 20px rgba(0, 229, 160, 0.25);
            --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background: var(--bg-900);
            color: var(--text-100);
            line-height: 1.8;
            overflow-x: hidden;
            font-variant-numeric: tabular-nums;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.3s ease;
        }

        a:hover {
            color: var(--brand);
        }

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

        .container {
            max-width: 1200px;
            padding: 0 20px;
        }

        /* 按钮 */
        .btn-brand {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--brand);
            color: #0B1E26;
            font-weight: 700;
            font-size: 16px;
            padding: 12px 28px;
            border: none;
            border-radius: 12px;
            box-shadow: var(--shadow-btn);
            transition: all 0.3s ease;
        }

        .btn-brand:hover {
            background: #33EBB3;
            color: #0B1E26;
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(0, 229, 160, 0.35);
        }

        .btn-brand:focus-visible {
            outline: 2px solid #33EBB3;
            outline-offset: 3px;
        }

        .btn-outline-brand {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--brand);
            font-weight: 600;
            font-size: 16px;
            padding: 11px 26px;
            border: 1px solid var(--brand);
            border-radius: 12px;
            transition: all 0.3s ease;
        }

        .btn-outline-brand:hover {
            background: rgba(0, 229, 160, 0.1);
            color: var(--brand);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 229, 160, 0.15);
        }

        .btn-outline-brand:focus-visible {
            outline: 2px solid var(--brand);
            outline-offset: 3px;
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1040;
            background: rgba(11, 30, 38, 0.88);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border-color);
            padding: 12px 0;
        }

        .site-header .navbar {
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: nowrap;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-100);
            flex-shrink: 0;
            padding: 0;
            line-height: 1.3;
        }

        .navbar-brand:hover {
            color: var(--text-100);
        }

        .navbar-brand .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--brand);
            color: #0B1E26;
            font-size: 14px;
            font-weight: 900;
            border-radius: 10px;
            letter-spacing: -1px;
        }

        .navbar-brand .brand-name {
            color: var(--brand);
            font-size: 22px;
            font-weight: 800;
            letter-spacing: 0.5px;
        }

        .nav-chips-wrapper {
            display: flex;
            align-items: center;
            flex: 1;
            overflow: hidden;
        }

        .nav-chips {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0;
            padding: 0;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }

        .nav-chips::-webkit-scrollbar {
            display: none;
        }

        .nav-chips .chip {
            display: inline-block;
            padding: 8px 16px;
            background: var(--bg-700);
            color: var(--text-200);
            font-size: 14px;
            font-weight: 500;
            border-radius: var(--radius-sm);
            white-space: nowrap;
            border: 1px solid transparent;
            transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
        }

        .nav-chips .chip:hover {
            color: var(--brand);
            background: rgba(0, 229, 160, 0.1);
            border-color: var(--border-color);
        }

        .nav-chips .chip:focus-visible {
            outline: 2px solid var(--brand);
            outline-offset: 2px;
        }

        .nav-chips .chip.active {
            background: var(--brand);
            color: #0B1E26;
            font-weight: 700;
            border-color: var(--brand);
        }

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

        .nav-cta .btn-brand {
            padding: 9px 20px;
            font-size: 14px;
            border-radius: 10px;
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            color: var(--text-100);
            font-size: 24px;
            padding: 4px 12px;
            margin-left: auto;
            line-height: 1.4;
            cursor: pointer;
            transition: border-color 0.3s ease, color 0.3s ease;
        }

        .mobile-toggle:hover {
            border-color: var(--brand);
            color: var(--brand);
        }

        /* 主区域 */
        main {
            padding-top: 69px;
        }

        /* 文章 Hero */
        .article-hero {
            position: relative;
            padding: 60px 0 55px;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 30, 38, 0.95) 0%, rgba(11, 30, 38, 0.75) 60%, rgba(11, 30, 38, 0.55) 100%);
        }

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

        /* 面包屑 */
        .article-breadcrumb {
            display: flex;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }

        .article-breadcrumb .bc-list {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0;
            list-style: none;
            margin: 0;
            padding: 0;
            font-size: 14px;
        }

        .article-breadcrumb .bc-item {
            color: var(--text-300);
        }

        .article-breadcrumb .bc-item a {
            color: var(--text-200);
            transition: color 0.3s ease;
        }

        .article-breadcrumb .bc-item a:hover {
            color: var(--brand);
        }

        .article-breadcrumb .bc-item+.bc-item::before {
            content: "/";
            color: var(--text-300);
            padding: 0 10px;
        }

        .article-breadcrumb .bc-item.active {
            color: var(--brand);
            font-weight: 600;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 240px;
        }

        /* 文章标题 */
        .article-title {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.28;
            color: var(--text-100);
            margin-bottom: 20px;
            max-width: 780px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .meta-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(0, 229, 160, 0.1);
            border: 1px solid var(--border-color);
            color: var(--text-200);
            font-size: 13px;
            padding: 6px 16px;
            border-radius: 999px;
            line-height: 1.4;
        }

        .meta-chip i {
            color: var(--brand);
            font-size: 14px;
        }

        /* 正文区 */
        .article-body-section {
            padding: 60px 0 70px;
            background: linear-gradient(180deg, var(--bg-900) 0%, var(--bg-800) 100%);
        }

        .article-content-card {
            max-width: 760px;
            margin: 0 auto;
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 48px 56px;
            box-shadow: var(--shadow-card);
        }

        .article-body {
            font-size: 17px;
            line-height: 1.9;
            color: var(--text-100);
            word-break: break-word;
        }

        .article-body p {
            margin-bottom: 1.5rem;
            font-size: 17px;
            line-height: 1.9;
            text-align: left;
            color: var(--text-100);
        }

        .article-body h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-100);
            margin: 2rem 0 1rem;
            padding-left: 14px;
            border-left: 4px solid var(--brand);
            line-height: 1.4;
        }

        .article-body h4 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-100);
            margin: 1.5rem 0 0.75rem;
            line-height: 1.4;
        }

        .article-body blockquote {
            background: var(--bg-700);
            border-left: 4px solid var(--brand);
            padding: 18px 24px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            color: var(--text-200);
            margin: 1.5rem 0;
            font-size: 15px;
        }

        .article-body blockquote p {
            margin-bottom: 0;
            color: var(--text-200);
            font-size: 15px;
        }

        .article-body table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            margin: 1.5rem 0;
            font-size: 15px;
            background: var(--bg-800);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
        }

        .article-body table th,
        .article-body table td {
            border-bottom: 1px solid var(--border-color);
            border-right: 1px solid var(--border-color);
            padding: 12px 16px;
            text-align: left;
        }

        .article-body table th:last-child,
        .article-body table td:last-child {
            border-right: none;
        }

        .article-body table tr:last-child td {
            border-bottom: none;
        }

        .article-body table th {
            background: var(--bg-700);
            color: var(--brand);
            font-weight: 600;
        }

        .article-body table tr:nth-child(even) td {
            background: rgba(16, 44, 55, 0.6);
        }

        .article-body img {
            border-radius: var(--radius-md);
            margin: 1rem auto;
            display: block;
        }

        .article-body ul,
        .article-body ol {
            padding-left: 24px;
            margin-bottom: 1.5rem;
        }

        .article-body li {
            margin-bottom: 8px;
            color: var(--text-100);
        }

        .article-body a {
            color: var(--brand);
            text-decoration: underline;
            text-underline-offset: 4px;
            text-decoration-color: rgba(0, 229, 160, 0.4);
        }

        .article-body a:hover {
            color: #33EBB3;
            text-decoration-color: #33EBB3;
        }

        .article-body hr {
            border: none;
            border-top: 1px solid var(--border-color);
            margin: 2rem 0;
        }

        .article-body pre {
            background: var(--bg-800);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 18px;
            overflow-x: auto;
            font-size: 14px;
            line-height: 1.6;
            margin-bottom: 1.5rem;
            color: var(--text-100);
        }

        .article-body code {
            background: var(--bg-700);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 14px;
            color: var(--brand);
        }

        .article-body pre code {
            background: transparent;
            padding: 0;
            color: inherit;
        }

        /* 标签 */
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
        }

        .tag-chip {
            display: inline-block;
            padding: 6px 16px;
            background: var(--bg-700);
            color: var(--text-200);
            font-size: 13px;
            border-radius: 999px;
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
        }

        .tag-chip:hover {
            color: var(--brand);
            border-color: var(--brand);
            background: rgba(0, 229, 160, 0.08);
        }

        /* 未找到 */
        .article-notfound {
            text-align: center;
            padding: 70px 20px;
            max-width: 760px;
            margin: 0 auto;
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
        }

        .notfound-icon {
            font-size: 54px;
            margin-bottom: 16px;
            color: var(--brand);
        }

        .article-notfound h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-100);
        }

        .article-notfound p {
            color: var(--text-200);
            margin-bottom: 28px;
            font-size: 16px;
        }

        /* 相关推荐 */
        .related-section {
            padding: 70px 0 50px;
            background: linear-gradient(180deg, var(--bg-800) 0%, var(--bg-900) 100%);
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-100);
            text-align: center;
            margin-bottom: 40px;
        }

        .section-title::after {
            content: "";
            display: block;
            width: 48px;
            height: 4px;
            background: var(--brand);
            border-radius: 4px;
            margin: 12px auto 0;
        }

        .related-card {
            height: 100%;
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
            gap: 12px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.18);
        }

        .related-card:hover {
            transform: translateY(-4px);
            border-color: var(--brand);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
            background: rgba(16, 44, 55, 0.95);
        }

        .related-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-100);
            line-height: 1.5;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color 0.3s ease;
        }

        .related-card h3:hover {
            color: var(--brand);
        }

        .related-excerpt {
            font-size: 14px;
            color: var(--text-200);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin: 0;
        }

        .related-date {
            font-size: 12px;
            color: var(--text-300);
            margin-top: auto;
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .related-date i {
            color: var(--brand);
            font-size: 12px;
        }

        /* 返回首页 */
        .back-home {
            padding: 0 0 60px;
            background: var(--bg-900);
            text-align: center;
        }

        /* CTA */
        .cta-section {
            padding: 70px 0 80px;
            text-align: center;
            background: linear-gradient(180deg, var(--bg-900) 0%, var(--bg-800) 100%);
            border-top: 1px solid var(--border-color);
        }

        .cta-section h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text-100);
            margin-bottom: 14px;
            line-height: 1.3;
        }

        .cta-section h2 span {
            color: var(--brand);
        }

        .cta-section p {
            color: var(--text-200);
            margin-bottom: 28px;
            font-size: 16px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-800);
            border-top: 1px solid var(--border-color);
            padding: 70px 0 30px;
        }

        .footer-col {
            margin-bottom: 30px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-brand .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--brand);
            color: #0B1E26;
            font-size: 14px;
            font-weight: 900;
            border-radius: 10px;
            letter-spacing: -1px;
        }

        .footer-brand .brand-name {
            color: var(--brand);
            font-size: 20px;
            font-weight: 800;
            letter-spacing: 0.5px;
        }

        .footer-desc {
            color: var(--text-200);
            font-size: 14px;
            line-height: 1.7;
            margin: 0;
            max-width: 320px;
        }

        .footer-title {
            color: var(--text-100);
            font-weight: 700;
            font-size: 16px;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 28px;
            height: 2px;
            background: var(--brand);
            border-radius: 2px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 12px;
        }

        .footer-links a {
            color: var(--text-200);
            font-size: 14px;
            transition: all 0.3s ease;
            display: inline-block;
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            margin-top: 10px;
            color: var(--text-300);
            font-size: 14px;
            text-align: center;
        }

        /* 响应式 */
        @media (max-width: 991px) {
            .mobile-toggle {
                display: inline-flex;
                align-items: center;
            }

            .nav-chips-wrapper {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--bg-800);
                border-bottom: 1px solid var(--border-color);
                padding: 16px 20px;
                box-shadow: 0 16px 30px rgba(0, 0, 0, 0.3);
            }

            .nav-chips-wrapper.open {
                display: block;
            }

            .nav-chips {
                overflow-x: auto;
                flex-wrap: nowrap;
            }

            .nav-cta {
                display: none;
            }

            .article-hero {
                padding: 40px 0 40px;
            }

            .article-title {
                font-size: 36px;
            }

            .article-content-card {
                padding: 36px 32px;
            }

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

        @media (max-width: 767px) {
            main {
                padding-top: 64px;
            }

            .article-hero {
                padding: 32px 0 32px;
            }

            .article-title {
                font-size: 28px;
            }

            .article-content-card {
                padding: 24px 20px;
                border-radius: var(--radius-md);
            }

            .article-body,
            .article-body p {
                font-size: 16px;
                line-height: 1.85;
            }

            .article-body h3 {
                font-size: 20px;
                margin: 1.5rem 0 0.8rem;
            }

            .article-body h4 {
                font-size: 18px;
            }

            .article-tags {
                margin-top: 28px;
                padding-top: 18px;
            }

            .section-title {
                font-size: 26px;
                margin-bottom: 28px;
            }

            .related-section {
                padding: 50px 0 36px;
            }

            .back-home {
                padding-bottom: 40px;
            }

            .cta-section {
                padding: 50px 0 60px;
            }

            .cta-section h2 {
                font-size: 24px;
            }

            .footer-bottom {
                font-size: 13px;
            }
        }

        @media (max-width: 480px) {
            .article-breadcrumb .bc-item+.bc-item::before {
                padding: 0 6px;
            }

            .article-breadcrumb .bc-item.active {
                max-width: 140px;
            }

            .article-meta {
                gap: 8px;
            }

            .meta-chip {
                font-size: 12px;
                padding: 4px 12px;
            }

            .article-title {
                font-size: 24px;
            }

            .btn-brand,
            .btn-outline-brand {
                width: 100%;
                justify-content: center;
            }

            .navbar-brand .brand-name {
                font-size: 18px;
            }

            .navbar-brand .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 12px;
            }
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --brand: #00E5A0;
            --brand-hover: #00C489;
            --brand-light: #33EBB3;
            --accent: #FFB800;
            --bg-900: #0B1E26;
            --bg-800: #102C37;
            --bg-700: #163A47;
            --card-bg: rgba(15, 43, 51, 0.85);
            --text-100: #F2F7F5;
            --text-200: #9FB8B0;
            --text-300: #5C7A72;
            --border-color: rgba(0, 229, 160, 0.12);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 8px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.25);
            --shadow-btn: 0 6px 20px rgba(0, 229, 160, 0.25);
            --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        body {
            margin: 0;
            font-family: var(--font-family);
            background: var(--bg-900);
            color: var(--text-100);
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease;
        }
        a:hover {
            color: var(--brand);
        }
        img {
            max-width: 100%;
            display: block;
        }
        ul,
        ol {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 800;
            line-height: 1.2;
            margin: 0 0 12px;
            color: var(--text-100);
        }
        p {
            margin: 0 0 16px;
        }
        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ===== 按钮 ===== */
        .btn {
            border-radius: 12px;
            padding: 12px 28px;
            font-weight: 700;
            font-size: 16px;
            border: none;
            transition: all .25s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-brand {
            background: var(--brand);
            color: #0B1E26;
            box-shadow: var(--shadow-btn);
            --bs-btn-active-bg: var(--brand-hover);
            --bs-btn-active-border-color: transparent;
        }
        .btn-brand:hover {
            background: var(--brand-light);
            color: #0B1E26;
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(0, 229, 160, 0.35);
        }
        .btn-brand:focus {
            outline: 2px solid var(--brand-light);
            outline-offset: 3px;
            box-shadow: 0 0 0 4px rgba(0, 229, 160, 0.2);
        }
        .btn-outline-brand {
            background: transparent;
            border: 1px solid var(--brand);
            color: var(--brand);
            --bs-btn-border-color: var(--brand);
        }
        .btn-outline-brand:hover {
            background: rgba(0, 229, 160, 0.1);
            color: var(--brand);
            transform: translateY(-2px);
        }
        .btn-outline-brand:focus {
            outline: 2px solid transparent;
            outline-offset: 3px;
            box-shadow: 0 0 0 4px rgba(0, 229, 160, 0.2);
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1030;
            background: rgba(11, 30, 38, 0.85);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border-color);
        }
        .navbar {
            min-height: 68px;
            padding: 0;
            background: transparent;
            --bs-navbar-padding-y: 0;
            --bs-navbar-brand-padding-y: 0;
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-right: 24px;
            padding: 0;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--brand);
            color: #0B1E26;
            font-weight: 800;
            font-size: 14px;
            border-radius: 10px;
            flex-shrink: 0;
        }
        .brand-name {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-100);
            letter-spacing: 1px;
        }
        .nav-chips-wrapper {
            display: flex;
            align-items: center;
        }
        .nav-chips {
            display: flex;
            gap: 6px;
            margin: 0;
            padding: 0;
        }
        .nav-chips .chip {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: 8px;
            background: var(--bg-700);
            color: var(--text-200);
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            border: 1px solid transparent;
            transition: all .2s ease;
        }
        .nav-chips .chip:hover {
            color: var(--brand);
            background: rgba(0, 229, 160, 0.08);
        }
        .nav-chips .chip.active {
            background: var(--brand);
            color: #0B1E26;
            font-weight: 700;
            box-shadow: var(--shadow-btn);
        }
        .nav-cta {
            margin-left: auto;
        }
        .mobile-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-100);
            font-size: 28px;
            padding: 8px 4px;
            line-height: 1;
        }

        /* ===== 页面横幅 ===== */
        .page-banner {
            padding: 140px 0 70px;
            background: linear-gradient(135deg, rgba(11, 30, 38, 0.95), rgba(11, 30, 38, 0.55)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            position: relative;
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb-wrap {
            font-size: 13px;
            color: var(--text-300);
            margin-bottom: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 4px;
        }
        .breadcrumb-wrap a {
            color: var(--text-300);
        }
        .breadcrumb-wrap a:hover {
            color: var(--brand);
        }
        .breadcrumb-wrap .sep {
            margin: 0 4px;
            color: var(--text-300);
        }
        .breadcrumb-wrap .current {
            color: var(--brand);
        }
        .page-banner h1 {
            font-size: 48px;
            margin-bottom: 14px;
            background: linear-gradient(90deg, var(--brand), #B3FFE0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-banner .banner-desc {
            font-size: 18px;
            color: var(--text-200);
            max-width: 640px;
            margin-bottom: 0;
        }

        /* ===== 对比卡 ===== */
        .compare-section {
            padding: 80px 0 70px;
            background: linear-gradient(180deg, var(--bg-900), var(--bg-800));
        }
        .section-head {
            text-align: center;
            margin-bottom: 44px;
        }
        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 2px;
            color: var(--brand);
            text-transform: uppercase;
            background: rgba(0, 229, 160, 0.1);
            border: 1px solid var(--border-color);
            padding: 6px 14px;
            border-radius: 999px;
            margin-bottom: 12px;
        }
        .section-head h2 {
            font-size: 36px;
            margin-bottom: 8px;
        }
        .section-head p {
            color: var(--text-200);
            font-size: 16px;
            max-width: 560px;
            margin: 0 auto;
        }
        .compare-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 36px 28px 32px;
            height: 100%;
            display: flex;
            flex-direction: column;
            position: relative;
            transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
            backdrop-filter: blur(4px);
        }
        .compare-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
            border-color: rgba(0, 229, 160, 0.3);
        }
        .compare-card.main-card {
            transform: scale(1.03);
            border-color: var(--brand);
            box-shadow: 0 0 0 1px var(--brand), var(--shadow-card);
        }
        .compare-card.main-card:hover {
            transform: scale(1.03) translateY(-6px);
        }
        .compare-card.gold-border {
            border-color: rgba(255, 184, 0, 0.35);
        }
        .compare-tag {
            position: absolute;
            top: 16px;
            right: 16px;
            font-size: 12px;
            font-weight: 700;
            color: var(--accent);
            background: rgba(255, 184, 0, 0.12);
            border: 1px solid rgba(255, 184, 0, 0.25);
            padding: 4px 10px;
            border-radius: 999px;
        }
        .compare-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: rgba(0, 229, 160, 0.1);
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--brand);
            margin-bottom: 20px;
        }
        .compare-card h3 {
            font-size: 22px;
            margin-bottom: 8px;
            color: var(--text-100);
        }
        .compare-reward {
            font-size: 28px;
            font-weight: 800;
            color: var(--accent);
            margin-bottom: 18px;
            font-variant-numeric: tabular-nums;
        }
        .compare-card ul {
            margin: 0;
        }
        .compare-card ul li {
            color: var(--text-200);
            font-size: 14px;
            padding: 6px 0;
            display: flex;
            align-items: flex-start;
            gap: 8px;
            line-height: 1.5;
        }
        .compare-card ul li i {
            color: var(--brand);
            font-size: 16px;
            flex-shrink: 0;
            margin-top: 2px;
        }

        /* ===== 数据矩阵 ===== */
        .data-section {
            padding: 70px 0;
            background: linear-gradient(0deg, var(--bg-900), var(--bg-800));
        }
        .data-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px 20px;
            text-align: center;
            height: 100%;
            transition: transform .25s ease, box-shadow .25s ease;
        }
        .data-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
            border-color: rgba(0, 229, 160, 0.25);
        }
        .data-num {
            font-size: 40px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 6px;
            font-variant-numeric: tabular-nums;
        }
        .data-label {
            font-size: 14px;
            color: var(--text-200);
            letter-spacing: 1px;
        }
        .data-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            background: var(--brand);
            border-radius: 50%;
            margin-bottom: 12px;
            box-shadow: 0 0 12px rgba(0, 229, 160, 0.6);
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 80px 0;
            background: linear-gradient(180deg, var(--bg-800), var(--bg-900));
        }
        .faq-container {
            max-width: 820px;
            margin: 0 auto;
        }
        .accordion-item {
            background: var(--bg-700);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color .2s ease;
        }
        .accordion-item:has(.accordion-button:not(.collapsed)) {
            border-color: rgba(0, 229, 160, 0.35);
        }
        .accordion-button {
            background: var(--bg-700);
            color: var(--text-100);
            font-weight: 600;
            font-size: 16px;
            padding: 20px 24px;
            box-shadow: none;
            border-radius: 0 !important;
        }
        .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid rgba(0, 229, 160, 0.3);
        }
        .accordion-button:not(.collapsed) {
            background: rgba(0, 229, 160, 0.08);
            color: var(--brand);
        }
        .accordion-button::after {
            filter: invert(1);
            opacity: .6;
        }
        .accordion-button:not(.collapsed)::after {
            filter: invert(1);
            opacity: 1;
        }
        .accordion-body {
            padding: 0 24px 22px;
            color: var(--text-200);
            font-size: 15px;
            border-top: 1px solid var(--border-color);
            margin-top: 0;
            padding-top: 18px;
        }

        /* ===== 返回入口 ===== */
        .return-section {
            padding: 70px 0;
            background: linear-gradient(0deg, var(--bg-900), var(--bg-700));
        }
        .return-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 40px;
            height: 100%;
        }
        .return-card h2 {
            font-size: 28px;
            margin-bottom: 12px;
        }
        .return-card p {
            color: var(--text-200);
            margin-bottom: 24px;
        }
        .rounded-img {
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            width: 100%;
            object-fit: cover;
            aspect-ratio: 16 / 10;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, rgba(0, 229, 160, 0.08), rgba(255, 184, 0, 0.05)), var(--bg-900);
            border-top: 1px solid var(--border-color);
        }
        .cta-inner {
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: 36px;
            margin-bottom: 12px;
        }
        .cta-inner p {
            color: var(--text-200);
            font-size: 17px;
            margin-bottom: 28px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-800);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 0;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .footer-brand .brand-name {
            font-size: 18px;
        }
        .footer-desc {
            color: var(--text-300);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-100);
            margin-bottom: 16px;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: var(--text-200);
            font-size: 14px;
            transition: all .2s ease;
        }
        .footer-links a:hover {
            color: var(--brand);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding: 20px 0;
            text-align: center;
            color: var(--text-300);
            font-size: 13px;
            margin-top: 40px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991px) {
            .navbar {
                flex-wrap: wrap;
                padding: 12px 0;
            }
            .nav-chips-wrapper {
                display: none;
                width: 100%;
                order: 3;
                padding-top: 12px;
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
            }
            .nav-chips-wrapper.open {
                display: block;
            }
            .nav-chips {
                flex-wrap: nowrap;
                min-width: max-content;
                padding-bottom: 4px;
            }
            .mobile-toggle {
                display: block;
            }
            .modal-brand {
                margin-right: auto;
            }
            .page-banner {
                padding-top: 120px;
            }
            .page-banner h1 {
                font-size: 32px;
            }
            .compare-card.main-card {
                transform: scale(1);
            }
            .data-card {
                padding: 24px 14px;
            }
            .data-num {
                font-size: 32px;
            }
        }

        @media (max-width: 767px) {
            .page-banner {
                padding-top: 110px;
                padding-bottom: 50px;
            }
            .page-banner h1 {
                font-size: 28px;
            }
            .page-banner .banner-desc {
                font-size: 16px;
            }
            .section-head h2 {
                font-size: 26px;
            }
            .compare-section,
            .data-section,
            .faq-section,
            .return-section,
            .cta-section {
                padding: 50px 0;
            }
            .cta-inner h2 {
                font-size: 26px;
            }
            .return-card {
                padding: 28px 24px;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .navbar-brand .brand-name {
                font-size: 18px;
            }
            .nav-chips .chip {
                padding: 6px 12px;
                font-size: 13px;
            }
            .compare-reward {
                font-size: 24px;
            }
            .data-num {
                font-size: 28px;
            }
        }

/* roulang page: category3 */
:root {
  --brand: #00E5A0;
  --brand-hover: #00C489;
  --brand-light: #33EBB3;
  --accent: #FFB800;
  --accent-soft: rgba(255, 184, 0, 0.12);
  --bg-900: #0B1E26;
  --bg-800: #102C37;
  --bg-700: #163A47;
  --card-bg: rgba(15, 43, 51, 0.85);
  --text-100: #F2F7F5;
  --text-200: #9FB8B0;
  --text-300: #5C7A72;
  --border-color: rgba(0, 229, 160, 0.12);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 8px;
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.25);
  --shadow-btn: 0 6px 20px rgba(0, 229, 160, 0.25);
  --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-family);
  background: var(--bg-900);
  color: var(--text-100);
  line-height: 1.8;
  font-size: 16px;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: color 0.2s ease; }
a:hover { color: var(--brand); }
img { max-width: 100%; height: auto; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; }
.container { max-width: 1200px; padding-left: 24px; padding-right: 24px; }

/* ========== Header ========== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1050;
  background: rgba(11, 30, 38, 0.85);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-color);
  padding: 10px 0;
  transition: background 0.3s ease;
}
.navbar { min-height: 56px; gap: 20px; }
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-right: 0;
  padding: 0;
}
.logo-icon {
  width: 40px; height: 40px;
  background: var(--brand);
  color: var(--bg-900);
  font-weight: 800;
  font-size: 15px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  letter-spacing: -0.5px;
  box-shadow: var(--shadow-btn);
}
.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-100);
}
.nav-chips-wrapper { display: flex; align-items: center; flex: 1; justify-content: center; }
.nav-chips {
  display: flex;
  gap: 6px;
  padding: 0;
  margin: 0;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.nav-chips::-webkit-scrollbar { display: none; }
.nav-chips .chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  background: var(--bg-700);
  color: var(--text-200);
  font-size: 14px;
  font-weight: 400;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  cursor: pointer;
}
.nav-chips .chip:hover {
  color: var(--text-100);
  background: var(--bg-800);
  border-color: var(--border-color);
}
.nav-chips .chip.active {
  background: var(--brand);
  color: var(--bg-900);
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(0, 229, 160, 0.25);
}
.nav-cta { margin-left: auto; }
.btn-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--brand);
  color: var(--bg-900);
  font-weight: 600;
  font-size: 15px;
  padding: 10px 26px;
  border-radius: 12px;
  border: 1px solid transparent;
  transition: all 0.25s ease;
  box-shadow: var(--shadow-btn);
}
.btn-brand:hover {
  background: var(--brand-light);
  color: var(--bg-900);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(0, 229, 160, 0.35);
}
.btn-brand:focus {
  outline: 2px solid var(--brand-light);
  outline-offset: 2px;
}
.btn-brand i { font-size: 14px; }
.mobile-toggle {
  display: none;
  background: var(--bg-700);
  border: 1px solid var(--border-color);
  color: var(--text-100);
  width: 42px; height: 42px;
  border-radius: 10px;
  font-size: 18px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

/* ========== Page Banner ========== */
.page-banner {
  position: relative;
  padding: 130px 0 64px;
  background:
    linear-gradient(135deg, rgba(11, 30, 38, 0.94) 0%, rgba(11, 30, 38, 0.72) 50%, rgba(16, 44, 55, 0.58) 100%),
    url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  border-bottom: 1px solid var(--border-color);
}
.banner-inner { max-width: 800px; }
.banner-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 229, 160, 0.12);
  border: 1px solid var(--border-color);
  color: var(--brand);
  font-size: 13px;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}
.banner-badge .dot {
  width: 6px; height: 6px;
  background: var(--brand);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}
.page-banner h1 {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 18px;
  color: var(--text-100);
}
.page-banner h1 .highlight {
  background: linear-gradient(90deg, var(--brand), #B3FFE0);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.banner-desc {
  font-size: 17px;
  color: var(--text-200);
  line-height: 1.8;
  max-width: 660px;
  margin-bottom: 32px;
}
.banner-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-outline-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--brand);
  border: 1px solid var(--brand);
  font-size: 15px;
  font-weight: 500;
  padding: 10px 26px;
  border-radius: 12px;
  transition: all 0.25s ease;
}
.btn-outline-brand:hover {
  background: rgba(0, 229, 160, 0.1);
  color: var(--brand-light);
  transform: translateY(-2px);
}
.btn-outline-brand:focus {
  outline: 2px solid var(--brand-light);
  outline-offset: 2px;
}

/* ========== Timeline Section ========== */
.timeline-section {
  padding: 80px 0;
  background: linear-gradient(180deg, var(--bg-900) 0%, var(--bg-800) 100%);
}
.section-head {
  text-align: center;
  margin-bottom: 56px;
}
.section-head .section-tag {
  display: inline-block;
  color: var(--brand);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 10px;
  background: rgba(0, 229, 160, 0.1);
  padding: 4px 14px;
  border-radius: 999px;
  border: 1px solid var(--border-color);
}
.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-100);
  margin-bottom: 12px;
}
.section-head p {
  color: var(--text-200);
  font-size: 16px;
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
}
.timeline {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  padding-left: 48px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 16px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--brand) 0%, rgba(0, 229, 160, 0.35) 60%, transparent 100%);
}
.timeline-item {
  position: relative;
  margin-bottom: 28px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 30px;
  transition: all 0.3s ease;
}
.timeline-item:hover {
  border-color: rgba(0, 229, 160, 0.35);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  transform: translateY(-2px);
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -39px;
  top: 34px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 5px rgba(0, 229, 160, 0.15), 0 0 12px rgba(0, 229, 160, 0.4);
  z-index: 1;
}
.timeline-step {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 229, 160, 0.1);
  color: var(--brand);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 12px;
  border: 1px solid rgba(0, 229, 160, 0.2);
}
.timeline-item h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-100);
  margin-bottom: 10px;
  line-height: 1.4;
}
.timeline-item p {
  color: var(--text-200);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 0;
}
.timeline-item .step-number {
  font-size: 28px;
  font-weight: 800;
  color: var(--brand);
  opacity: 0.3;
  position: absolute;
  top: 20px;
  right: 24px;
  line-height: 1;
}

/* ========== Feature Image ========== */
.feature-section {
  padding: 80px 0;
  background: var(--bg-800);
}
.feature-wrapper {
  display: flex;
  align-items: center;
  gap: 60px;
  flex-wrap: wrap;
}
.feature-media {
  flex: 1;
  min-width: 300px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-card);
}
.feature-media img {
  width: 100%;
  display: block;
  transition: transform 0.4s ease;
}
.feature-media:hover img { transform: scale(1.03); }
.feature-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 50%, rgba(11, 30, 38, 0.25) 100%);
  pointer-events: none;
}
.feature-content { flex: 1; min-width: 300px; }
.feature-content h2 {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-100);
  margin-bottom: 18px;
}
.feature-content p {
  color: var(--text-200);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 14px;
}
.feature-list {
  margin-top: 20px;
  display: grid;
  gap: 12px;
}
.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--text-200);
  font-size: 14px;
  line-height: 1.6;
}
.feature-list li i {
  color: var(--brand);
  font-size: 17px;
  margin-top: 2px;
  flex-shrink: 0;
}

/* ========== Precautions ========== */
.precaution-section {
  padding: 80px 0;
  background: linear-gradient(180deg, var(--bg-800), var(--bg-900));
}
.precaution-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  max-width: 920px;
  margin: 0 auto;
}
.precaution-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  gap: 16px;
  transition: all 0.3s ease;
}
.precaution-card:hover {
  border-color: rgba(0, 229, 160, 0.3);
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}
.precaution-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 12px;
  background: rgba(0, 229, 160, 0.1);
  border: 1px solid var(--border-color);
  color: var(--brand);
  font-size: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.precaution-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-100);
  margin-bottom: 6px;
  line-height: 1.4;
}
.precaution-card p {
  color: var(--text-200);
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
}

/* ========== FAQ ========== */
.faq-section {
  padding: 80px 0;
  background: var(--bg-900);
}
.faq-wrapper {
  max-width: 860px;
  margin: 0 auto;
}
.accordion-item {
  background: var(--card-bg);
  border: 1px solid var(--border-color) !important;
  border-radius: var(--radius-md) !important;
  margin-bottom: 14px;
  overflow: hidden;
}
.accordion-button {
  background: transparent !important;
  color: var(--text-100) !important;
  font-size: 16px;
  font-weight: 600;
  padding: 18px 22px;
  box-shadow: none !important;
  transition: color 0.2s ease;
}
.accordion-button:hover { color: var(--brand) !important; }
.accordion-button:not(.collapsed) {
  color: var(--brand) !important;
  background: rgba(0, 229, 160, 0.04) !important;
}
.accordion-button::after {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2300E5A0'%3e%3cpath fill-rule='evenodd' d='M8 2a1 1 0 0 1 1 1v4h4a1 1 0 1 1 0 2H9v4a1 1 0 1 1-2 0V9H3a1 1 0 1 1 0-2h4V3a1 1 0 0 1 1-1z'/%3e%3c/svg%3e");
  transition: transform 0.2s ease;
}
.accordion-body {
  color: var(--text-200);
  font-size: 15px;
  line-height: 1.8;
  padding: 0 22px 22px;
  border-top: 1px solid rgba(0, 229, 160, 0.06);
}
.accordion-body p { margin: 0; }

/* ========== CTA ========== */
.cta-section {
  position: relative;
  padding: 90px 0;
  background:
    linear-gradient(135deg, rgba(11, 30, 38, 0.9), rgba(16, 44, 55, 0.78)),
    url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
  text-align: center;
  border-top: 1px solid var(--border-color);
}
.cta-section h2 {
  font-size: 34px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--text-100);
  margin-bottom: 14px;
}
.cta-section p {
  color: var(--text-200);
  font-size: 16px;
  max-width: 600px;
  margin: 0 auto 32px;
  line-height: 1.8;
}
.cta-section .btn-brand {
  font-size: 17px;
  padding: 14px 42px;
  border-radius: 14px;
}
.cta-section .btn-brand i { font-size: 16px; }

/* ========== Footer ========== */
.site-footer {
  background: var(--bg-800);
  border-top: 1px solid var(--border-color);
  padding: 56px 0 0;
}
.footer-col { margin-bottom: 28px; }
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.footer-desc {
  color: var(--text-200);
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 0;
}
.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-100);
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}
.footer-links li { margin-bottom: 8px; }
.footer-links a {
  color: var(--text-200);
  font-size: 14px;
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.footer-links a:hover {
  color: var(--brand);
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding: 20px 0;
  text-align: center;
  color: var(--text-300);
  font-size: 13px;
  margin-top: 20px;
}

/* ========== Responsive ========== */
@media (max-width: 991px) {
  .navbar { flex-wrap: wrap; }
  .mobile-toggle {
    display: inline-flex;
    margin-left: auto;
  }
  .nav-chips-wrapper {
    display: none;
    width: 100%;
    flex-basis: 100%;
    justify-content: flex-start;
    padding-top: 12px;
  }
  .nav-chips-wrapper.open { display: flex; }
  .nav-chips {
    flex-wrap: nowrap;
    overflow-x: auto;
    width: 100%;
    padding-bottom: 6px;
  }
  .nav-chips .chip { padding: 8px 14px; font-size: 13px; }
  .nav-cta { display: none !important; }
  .page-banner { padding: 110px 0 50px; }
  .page-banner h1 { font-size: 34px; }
  .section-head h2 { font-size: 26px; }
  .feature-wrapper { gap: 30px; }
  .precaution-grid { grid-template-columns: 1fr; }
}

@media (max-width: 767px) {
  .page-banner h1 { font-size: 28px; }
  .banner-desc { font-size: 15px; }
  .timeline { padding-left: 36px; }
  .timeline::before { left: 10px; }
  .timeline-item::before { left: -31px; width: 10px; height: 10px; }
  .timeline-item { padding: 22px 18px; }
  .timeline-item .step-number { font-size: 22px; }
  .timeline-item h3 { font-size: 17px; }
  .feature-content h2 { font-size: 24px; }
  .precaution-grid { grid-template-columns: 1fr; }
  .precaution-card { padding: 22px; }
  .cta-section h2 { font-size: 26px; }
  .cta-section .btn-brand {
    width: 100%;
    max-width: 340px;
    justify-content: center;
  }
  .footer-col { text-align: left; }
}

@media (max-width: 520px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .brand-name { font-size: 17px; }
  .logo-icon { width: 34px; height: 34px; font-size: 13px; }
  .page-banner { padding: 100px 0 42px; }
  .page-banner h1 { font-size: 24px; }
  .banner-actions { flex-direction: column; }
  .banner-actions .btn-brand,
  .banner-actions .btn-outline-brand { width: 100%; justify-content: center; }
  .timeline { padding-left: 30px; }
  .timeline::before { left: 7px; }
  .timeline-item::before { left: -26px; width: 8px; height: 8px; }
  .timeline-item { padding: 18px 16px; }
  .timeline-step { font-size: 12px; padding: 3px 10px; }
  .feature-media { min-width: 100%; }
  .feature-content { min-width: 100%; }
  .precaution-card { flex-direction: column; }
  .precaution-icon { width: 38px; height: 38px; font-size: 17px; }
}

@media (max-width: 350px) {
  .btn-brand,
  .btn-outline-brand { padding: 10px 18px; font-size: 14px; }
  .page-banner h1 { font-size: 21px; }
  .section-head h2 { font-size: 22px; }
  .timeline-item h3 { font-size: 15px; }
}