/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0B1A2E;
            --primary-light: #1B2A45;
            --accent: #00B4D8;
            --accent-glow: rgba(0, 180, 216, 0.5);
            --tertiary: #48CAE4;
            --bg-deep: #050C18;
            --text-primary: #E0E8F0;
            --text-secondary: #8899AA;
            --text-muted: #6B7D8E;
            --border-light: rgba(255, 255, 255, 0.15);
            --border-subtle: rgba(255, 255, 255, 0.08);
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-bg-hover: rgba(255, 255, 255, 0.10);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.4);
            --transition: 0.3s ease;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
            --container-max: 1200px;
            --nav-height: 70px;
            --section-padding: 80px 0;
            --section-padding-mobile: 50px 0;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-primary);
            background: var(--bg-deep);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--tertiary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: #ffffff;
            margin-bottom: 0.5em;
        }
        h1 {
            font-size: 36px;
        }
        h2 {
            font-size: 28px;
        }
        h3 {
            font-size: 22px;
        }
        h4 {
            font-size: 18px;
        }
        p {
            margin-bottom: 1em;
            color: var(--text-secondary);
        }
        .container {
            max-width: var(--container-max);
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== 导航 ===== */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1030;
            height: var(--nav-height);
            background: rgba(11, 26, 46, 0.85);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-light);
            padding: 0;
            transition: background var(--transition);
        }
        .navbar .container {
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .navbar-brand {
            font-size: 22px;
            font-weight: 700;
            color: var(--accent) !important;
            padding: 0;
            margin: 0;
            letter-spacing: 0.5px;
            line-height: 1;
        }
        .navbar-brand:hover {
            color: var(--tertiary) !important;
        }
        .navbar-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .navbar-nav .nav-link {
            color: #B0C4DE !important;
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px !important;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
            letter-spacing: 0.3px;
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link:focus {
            color: #ffffff !important;
            background: rgba(255, 255, 255, 0.06);
        }
        .navbar-nav .nav-link.active {
            color: #ffffff !important;
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .navbar-toggler {
            border: none;
            padding: 8px 12px;
            background: transparent;
            cursor: pointer;
        }
        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        .navbar-toggler .toggler-icon {
            display: block;
            width: 24px;
            height: 2px;
            background: #ffffff;
            margin: 5px 0;
            border-radius: 2px;
            transition: all var(--transition);
        }
        .navbar-toggler[aria-expanded="true"] .toggler-icon:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .navbar-toggler[aria-expanded="true"] .toggler-icon:nth-child(2) {
            opacity: 0;
        }
        .navbar-toggler[aria-expanded="true"] .toggler-icon:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: rgba(11, 26, 46, 0.98);
                backdrop-filter: blur(10px);
                -webkit-backdrop-filter: blur(10px);
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                padding: 16px 0;
                border-bottom: 1px solid var(--border-light);
                margin-top: 0;
            }
            .navbar-nav {
                flex-direction: column;
                gap: 4px;
                width: 100%;
            }
            .navbar-nav .nav-link {
                padding: 12px 24px !important;
                width: 100%;
                text-align: center;
                font-size: 16px;
            }
            .navbar-nav .nav-link.active::after {
                bottom: 4px;
                width: 40px;
            }
        }

        /* ===== 区块通用 ===== */
        section {
            padding: var(--section-padding);
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 28px;
            margin-bottom: 12px;
            color: #ffffff;
        }
        .section-title p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
        }

        /* ===== Hero ===== */
        .hero-section {
            min-height: 100vh;
            min-height: 700px;
            background: linear-gradient(135deg, #0B1A2E 0%, #1B2A45 100%);
            display: flex;
            align-items: center;
            padding: calc(var(--nav-height) + 40px) 0 60px;
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -20%;
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(0, 180, 216, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-content {
            display: flex;
            align-items: center;
            gap: 48px;
        }
        .hero-text {
            flex: 0 0 55%;
            max-width: 55%;
        }
        .hero-text h1 {
            font-size: 36px;
            color: #ffffff;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
            margin-bottom: 16px;
            line-height: 1.25;
        }
        .hero-text .lead {
            font-size: 18px;
            color: #B0C4DE;
            line-height: 1.6;
            max-width: 500px;
            margin-bottom: 32px;
        }
        .hero-buttons {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .hero-image {
            flex: 0 0 45%;
            max-width: 45%;
            position: relative;
        }
        .hero-image img {
            width: 100%;
            border-radius: var(--radius-xl);
            border: 2px solid rgba(255, 255, 255, 0.2);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
            object-fit: cover;
            aspect-ratio: 16/10;
        }
        .hero-image .glass-overlay {
            position: absolute;
            bottom: -12px;
            right: -12px;
            left: -12px;
            top: -12px;
            border-radius: calc(var(--radius-xl) + 12px);
            border: 1px solid rgba(255, 255, 255, 0.06);
            background: rgba(255, 255, 255, 0.02);
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
            pointer-events: none;
            z-index: 0;
        }
        .hero-image img {
            position: relative;
            z-index: 1;
        }
        @media (max-width: 991.98px) {
            .hero-content {
                flex-direction: column;
                gap: 32px;
            }
            .hero-text,
            .hero-image {
                flex: 0 0 100%;
                max-width: 100%;
            }
            .hero-text {
                text-align: center;
            }
            .hero-text .lead {
                margin-left: auto;
                margin-right: auto;
            }
            .hero-buttons {
                justify-content: center;
            }
            .hero-section {
                min-height: auto;
                padding: calc(var(--nav-height) + 30px) 0 40px;
            }
            .hero-text h1 {
                font-size: 30px;
            }
        }
        @media (max-width: 575.98px) {
            .hero-text h1 {
                font-size: 26px;
            }
            .hero-text .lead {
                font-size: 16px;
            }
            .hero-buttons {
                gap: 12px;
                flex-direction: column;
                align-items: center;
            }
        }

        /* ===== 按钮 ===== */
        .btn-glow {
            background: linear-gradient(135deg, #00B4D8, #0096C7);
            color: #ffffff !important;
            border: none;
            padding: 12px 32px;
            font-size: 16px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            box-shadow: 0 0 20px rgba(0, 180, 216, 0.5);
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
            line-height: 1.4;
        }
        .btn-glow:hover,
        .btn-glow:focus {
            box-shadow: 0 0 30px rgba(0, 180, 216, 0.7);
            transform: translateY(-2px);
            color: #ffffff !important;
            background: linear-gradient(135deg, #00B4D8, #0096C7);
        }
        .btn-glow:active {
            transform: translateY(0);
        }
        .btn-outline-accent {
            background: transparent;
            color: var(--accent) !important;
            border: 2px solid var(--accent);
            padding: 10px 30px;
            font-size: 16px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
            line-height: 1.4;
        }
        .btn-outline-accent:hover,
        .btn-outline-accent:focus {
            background: var(--accent);
            color: #ffffff !important;
            border-color: var(--tertiary);
            transform: translateY(-2px);
        }
        .btn-outline-accent:active {
            transform: translateY(0);
        }
        .btn-lg {
            padding: 14px 40px;
            font-size: 17px;
        }

        /* ===== 倒计时条 ===== */
        .countdown-bar {
            background: rgba(0, 0, 0, 0.4);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            padding: 14px 0;
        }
        .countdown-bar .container {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 24px;
            flex-wrap: wrap;
        }
        .countdown-label {
            font-size: 15px;
            color: #B0C4DE;
            font-weight: 500;
            white-space: nowrap;
        }
        .countdown-digits {
            display: flex;
            gap: 12px;
            align-items: center;
        }
        .countdown-digit-group {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 2px;
        }
        .countdown-digit {
            background: rgba(255, 255, 255, 0.10);
            border-radius: var(--radius-sm);
            padding: 6px 14px;
            font-size: 22px;
            font-weight: 700;
            color: #ffffff;
            font-family: 'Courier New', monospace;
            min-width: 48px;
            text-align: center;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .countdown-unit {
            font-size: 12px;
            color: var(--text-secondary);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .countdown-sep {
            font-size: 22px;
            color: var(--text-secondary);
            font-weight: 300;
            padding: 0 2px;
        }
        @media (max-width: 575.98px) {
            .countdown-bar .container {
                gap: 12px;
                flex-direction: column;
            }
            .countdown-digit {
                font-size: 18px;
                padding: 4px 10px;
                min-width: 38px;
            }
            .countdown-label {
                font-size: 14px;
            }
        }

        /* ===== 玻璃拟态卡片 ===== */
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            height: 100%;
        }
        .glass-card:hover {
            transform: scale(1.02);
            box-shadow: var(--shadow-hover);
            background: var(--glass-bg-hover);
        }
        .glass-card .card-icon {
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-md);
            background: rgba(0, 180, 216, 0.15);
            color: var(--accent);
            font-size: 24px;
            margin-bottom: 16px;
        }
        .glass-card h4 {
            font-size: 18px;
            color: #ffffff;
            margin-bottom: 8px;
        }
        .glass-card p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* ===== 卖点区域 ===== */
        .features-section {
            background: var(--bg-deep);
        }

        /* ===== 图墙 ===== */
        .gallery-section {
            background: linear-gradient(180deg, var(--bg-deep) 0%, var(--primary) 100%);
        }
        .gallery-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }
        .gallery-item {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            aspect-ratio: 16/10;
            cursor: pointer;
        }
        .gallery-item img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .gallery-item .gallery-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(0, 0, 0, 0.5) 0%, transparent 50%);
            opacity: 0;
            transition: opacity var(--transition);
            display: flex;
            align-items: flex-end;
            padding: 16px;
            color: #ffffff;
            font-size: 14px;
            font-weight: 500;
        }
        .gallery-item:hover img {
            transform: scale(1.08);
        }
        .gallery-item:hover .gallery-overlay {
            opacity: 1;
        }
        @media (max-width: 767.98px) {
            .gallery-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
        }
        @media (max-width: 575.98px) {
            .gallery-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, #0F2845 100%);
            text-align: center;
            padding: 80px 0;
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }
        .cta-section h2 {
            font-size: 28px;
            margin-bottom: 12px;
            color: #ffffff;
        }
        .cta-section p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 550px;
            margin: 0 auto 32px;
        }
        .cta-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
        }
        @media (max-width: 575.98px) {
            .cta-section {
                padding: 50px 0;
            }
            .cta-section h2 {
                font-size: 24px;
            }
            .cta-buttons {
                flex-direction: column;
                align-items: center;
                gap: 12px;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-deep);
        }
        .accordion {
            --bs-accordion-bg: transparent;
            --bs-accordion-border-color: var(--border-light);
            --bs-accordion-btn-bg: transparent;
            --bs-accordion-active-bg: transparent;
            --bs-accordion-btn-color: #ffffff;
            --bs-accordion-active-color: var(--accent);
            --bs-accordion-body-bg: transparent;
            --bs-accordion-btn-focus-box-shadow: none;
            --bs-accordion-border-radius: var(--radius-md);
        }
        .accordion-item {
            background: transparent;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
        }
        .accordion-button {
            font-size: 16px;
            font-weight: 500;
            color: #ffffff;
            background: rgba(255, 255, 255, 0.03);
            padding: 18px 24px;
            transition: background var(--transition);
            border-radius: var(--radius-md) !important;
        }
        .accordion-button:not(.collapsed) {
            background: rgba(0, 180, 216, 0.06);
            color: var(--accent);
            box-shadow: none;
        }
        .accordion-button:hover {
            background: rgba(255, 255, 255, 0.06);
        }
        .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2300B4D8'%3E%3Cpath fill-rule='evenodd' d='M8 2a.5.5 0 0 1 .5.5v5h5a.5.5 0 0 1 0 1h-5v5a.5.5 0 0 1-1 0v-5h-5a.5.5 0 0 1 0-1h5v-5A.5.5 0 0 1 8 2z'/%3E%3C/svg%3E");
            transition: transform var(--transition);
        }
        .accordion-button:not(.collapsed)::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2300B4D8'%3E%3Cpath fill-rule='evenodd' d='M2 8a.5.5 0 0 1 .5-.5h11a.5.5 0 0 1 0 1h-11A.5.5 0 0 1 2 8z'/%3E%3C/svg%3E");
        }
        .accordion-body {
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
            background: transparent;
        }
        .accordion-body p:last-child {
            margin-bottom: 0;
        }

        /* ===== 资讯列表 ===== */
        .news-section {
            background: var(--bg-deep);
        }
        .news-card {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: scale(1.02);
            box-shadow: var(--shadow-hover);
            background: var(--glass-bg-hover);
        }
        .news-card .thumb {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            border-bottom: 1px solid var(--border-subtle);
        }
        .news-card .card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card .card-body h4 {
            font-size: 17px;
            color: #ffffff;
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .card-body p {
            font-size: 14px;
            color: #A0B4C8;
            margin-bottom: 16px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .card-footer {
            padding: 12px 20px;
            background: transparent;
            border-top: 1px solid var(--border-subtle);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }
        .news-card .card-footer .date {
            font-size: 13px;
            color: var(--text-muted);
        }
        .news-card .card-footer .badge {
            font-size: 12px;
            font-weight: 500;
            padding: 3px 10px;
            border-radius: 4px;
            background: rgba(0, 180, 216, 0.2);
            color: var(--tertiary);
            border: none;
            white-space: nowrap;
        }
        .news-empty {
            text-align: center;
            padding: 48px 24px;
            color: var(--text-secondary);
            font-size: 16px;
        }
        .news-empty i {
            font-size: 48px;
            color: var(--text-muted);
            margin-bottom: 16px;
            display: block;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: #050C18;
            border-top: 1px solid var(--border-light);
            padding: 48px 0 32px;
        }
        .footer .container {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 40px;
        }
        .footer-brand {
            font-size: 20px;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 8px;
            display: block;
        }
        .footer p,
        .footer .copyright {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 4px;
        }
        .footer .copyright {
            margin-top: 12px;
            color: var(--text-muted);
        }
        .footer h5 {
            font-size: 16px;
            color: #ffffff;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer ul li {
            margin-bottom: 8px;
        }
        .footer ul li a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .footer ul li a:hover {
            color: var(--accent);
        }
        .footer .social-links {
            display: flex;
            gap: 16px;
            margin-top: 12px;
        }
        .footer .social-links a {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-secondary);
            font-size: 18px;
            transition: all var(--transition);
            border: 1px solid var(--border-subtle);
        }
        .footer .social-links a:hover {
            background: var(--accent);
            color: #ffffff;
            border-color: var(--accent);
            transform: translateY(-2px);
        }
        @media (max-width: 767.98px) {
            .footer .container {
                grid-template-columns: 1fr;
                gap: 32px;
                text-align: center;
            }
            .footer .social-links {
                justify-content: center;
            }
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 991.98px) {
            section {
                padding: var(--section-padding-mobile);
            }
            .section-title {
                margin-bottom: 32px;
            }
            .section-title h2 {
                font-size: 24px;
            }
        }
        @media (max-width: 575.98px) {
            h1 {
                font-size: 28px;
            }
            h2 {
                font-size: 24px;
            }
            h3 {
                font-size: 20px;
            }
            h4 {
                font-size: 16px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .glass-card {
                padding: 18px;
                border-radius: var(--radius-md);
            }
            .btn-lg {
                padding: 12px 28px;
                font-size: 15px;
            }
        }

        /* ===== 辅助 ===== */
        .text-accent {
            color: var(--accent);
        }
        .text-tertiary {
            color: var(--tertiary);
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .mb-32 {
            margin-bottom: 32px;
        }
        .mb-48 {
            margin-bottom: 48px;
        }
        .gap-16 {
            gap: 16px;
        }
        .gap-24 {
            gap: 24px;
        }

        /* ===== 图片圆角 ===== */
        .img-radius-sm {
            border-radius: var(--radius-sm);
        }
        .img-radius-md {
            border-radius: var(--radius-md);
        }
        .img-radius-lg {
            border-radius: var(--radius-lg);
        }

        /* ===== 聚焦轮廓 ===== */
        :focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== 选择文本 ===== */
        ::selection {
            background: rgba(0, 180, 216, 0.3);
            color: #ffffff;
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0B1A2E;
            --primary-dark: #050C18;
            --primary-light: #13273F;
            --accent: #00B4D8;
            --accent-hover: #0096C7;
            --teal: #48CAE4;
            --text-main: #E0E8F0;
            --text-secondary: #8899AA;
            --text-muted: #6B7D8F;
            --text-light: #B0C4DE;
            --border-light: rgba(255, 255, 255, 0.1);
            --border-glass: rgba(255, 255, 255, 0.15);
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-bg-hover: rgba(255, 255, 255, 0.10);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-nav: 0 2px 10px rgba(0, 0, 0, 0.2);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 20px rgba(0, 180, 216, 0.5);
            --shadow-glow-hover: 0 0 30px rgba(0, 180, 216, 0.7);
            --transition: 0.3s ease;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
            --container-max: 1200px;
            --nav-height: 70px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-main);
            background: var(--primary-dark);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--nav-height);
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--teal);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
        }
        ul,
        ol {
            margin: 0;
            padding: 0;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 600;
            line-height: 1.3;
            color: #fff;
            margin-top: 0;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            padding-left: 24px;
            padding-right: 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ===== 导航 ===== */
        .navbar {
            background: rgba(11, 26, 46, 0.85);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            height: var(--nav-height);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-nav);
            padding: 0;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
        }
        .navbar .container {
            height: 100%;
            display: flex;
            align-items: center;
        }
        .navbar-brand {
            font-size: 22px;
            font-weight: 700;
            color: var(--accent) !important;
            letter-spacing: 0.5px;
            padding: 0;
            margin-right: 0;
        }
        .navbar-brand:hover {
            color: var(--teal) !important;
        }
        .navbar-nav {
            gap: 4px;
        }
        .navbar-nav .nav-item {
            display: flex;
            align-items: center;
        }
        .navbar-nav .nav-link {
            color: var(--text-light) !important;
            font-size: 15px;
            font-weight: 500;
            padding: 8px 18px !important;
            border-radius: 6px;
            transition: all var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .navbar-nav .nav-link:hover {
            color: #fff !important;
            background: rgba(255, 255, 255, 0.06);
        }
        .navbar-nav .nav-link.active {
            color: #fff !important;
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .navbar-toggler {
            border: none;
            padding: 8px 4px;
            background: transparent;
            outline: none;
            box-shadow: none;
        }
        .navbar-toggler:focus {
            box-shadow: none;
        }
        .toggler-icon {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-light);
            margin: 5px 0;
            border-radius: 2px;
            transition: all var(--transition);
        }
        .navbar-toggler:not(.collapsed) .toggler-icon:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .navbar-toggler:not(.collapsed) .toggler-icon:nth-child(2) {
            opacity: 0;
        }
        .navbar-toggler:not(.collapsed) .toggler-icon:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        @media (max-width: 991px) {
            .navbar-collapse {
                background: rgba(11, 26, 46, 0.97);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                padding: 12px 16px;
                border: 1px solid var(--border-light);
                border-top: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
            }
            .navbar-nav {
                gap: 2px;
            }
            .navbar-nav .nav-link {
                padding: 10px 16px !important;
                font-size: 15px;
            }
            .navbar-nav .nav-link.active::after {
                display: none;
            }
            .navbar-nav .nav-link.active {
                background: rgba(0, 180, 216, 0.15);
                border-radius: 6px;
            }
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-section {
            padding: 32px 0 8px;
            background: transparent;
        }
        .breadcrumb {
            background: transparent;
            padding: 0;
            margin: 0;
            font-size: 14px;
            color: var(--text-secondary);
        }
        .breadcrumb-item a {
            color: var(--accent);
        }
        .breadcrumb-item a:hover {
            color: var(--teal);
        }
        .breadcrumb-item+.breadcrumb-item::before {
            content: '/';
            color: var(--text-muted);
            padding: 0 8px;
        }
        .breadcrumb-item.active {
            color: var(--text-secondary);
        }

        /* ===== 文章正文区 ===== */
        .article-wrapper {
            padding: 24px 0 80px;
        }
        .article-container {
            max-width: 800px;
            margin: 0 auto;
        }
        .article-header {
            margin-bottom: 40px;
        }
        .article-header h1 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.35;
            color: #fff;
            margin-bottom: 16px;
        }
        .article-meta {
            font-size: 14px;
            color: var(--text-secondary);
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            border-bottom: 1px solid var(--border-light);
            padding-bottom: 20px;
        }
        .article-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta .meta-item i {
            color: var(--accent);
            font-size: 14px;
        }
        .article-body {
            font-size: 16px;
            line-height: 1.8;
            color: #D0D9E8;
        }
        .article-body p {
            margin-bottom: 1.6em;
        }
        .article-body h2 {
            font-size: 24px;
            margin-top: 1.8em;
            margin-bottom: 0.8em;
            color: #fff;
            font-weight: 600;
        }
        .article-body h3 {
            font-size: 20px;
            margin-top: 1.6em;
            margin-bottom: 0.6em;
            color: #fff;
            font-weight: 600;
        }
        .article-body img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius-md);
            margin: 24px auto;
            display: block;
            box-shadow: var(--shadow-card);
        }
        .article-body blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 20px;
            margin: 24px 0;
            background: rgba(0, 180, 216, 0.06);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-body code {
            background: rgba(255, 255, 255, 0.08);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--teal);
        }
        .article-body pre {
            background: rgba(255, 255, 255, 0.06);
            padding: 20px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            border: 1px solid var(--border-light);
            margin: 24px 0;
        }
        .article-body pre code {
            background: transparent;
            padding: 0;
            color: var(--text-main);
        }
        .article-body ul,
        .article-body ol {
            padding-left: 24px;
            margin-bottom: 1.6em;
        }
        .article-body li {
            margin-bottom: 0.4em;
        }
        .article-body a {
            color: var(--accent);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body a:hover {
            color: var(--teal);
        }

        /* ===== 内容未找到 ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
            color: var(--text-secondary);
        }
        .not-found-box i {
            font-size: 64px;
            color: var(--text-muted);
            margin-bottom: 24px;
            display: block;
        }
        .not-found-box h3 {
            font-size: 24px;
            color: #fff;
            margin-bottom: 12px;
        }
        .not-found-box p {
            font-size: 16px;
            color: var(--text-secondary);
        }
        .not-found-box .btn-back {
            margin-top: 24px;
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 60px 0 80px;
            border-top: 1px solid var(--border-light);
            margin-top: 60px;
        }
        .related-section h2 {
            font-size: 24px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 32px;
            text-align: center;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--glass-bg);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            padding: 20px;
            transition: all var(--transition);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }
        .related-card:hover {
            background: var(--glass-bg-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }
        .related-card .thumb {
            width: 100%;
            aspect-ratio: 16 / 9;
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-bottom: 14px;
            background: var(--primary-light);
        }
        .related-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .related-card:hover .thumb img {
            transform: scale(1.05);
        }
        .related-card h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .meta {
            font-size: 13px;
            color: var(--text-muted);
        }
        .related-card .meta i {
            margin-right: 4px;
            font-size: 12px;
        }
        .related-card a {
            color: inherit;
            text-decoration: none;
        }
        @media (max-width: 768px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 520px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
            .article-header h1 {
                font-size: 24px;
            }
        }

        /* ===== 返回按钮 ===== */
        .back-link-wrap {
            text-align: center;
            margin-top: 40px;
        }
        .back-link-wrap .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        /* ===== 按钮 ===== */
        .btn {
            padding: 10px 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            border: none;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            text-decoration: none;
        }
        .btn-primary-custom {
            background: linear-gradient(135deg, var(--accent), var(--accent-hover));
            color: #fff;
            box-shadow: var(--shadow-glow);
        }
        .btn-primary-custom:hover {
            background: linear-gradient(135deg, var(--accent-hover), var(--accent));
            color: #fff;
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-2px);
        }
        .btn-outline-custom {
            background: transparent;
            color: var(--accent);
            border: 2px solid var(--accent);
        }
        .btn-outline-custom:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(0, 180, 216, 0.3);
        }

        /* ===== 页脚 ===== */
        .footer {
            background: #050C18;
            border-top: 1px solid var(--border-light);
            padding: 60px 0 40px;
            color: var(--text-secondary);
            font-size: 14px;
        }
        .footer .container {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 40px;
        }
        .footer-brand {
            font-size: 20px;
            font-weight: 700;
            color: var(--accent);
            display: block;
            margin-bottom: 12px;
        }
        .footer p {
            line-height: 1.7;
            margin-bottom: 12px;
            color: var(--text-secondary);
        }
        .footer .copyright {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 16px;
        }
        .footer h5 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer ul {
            list-style: none;
            padding: 0;
        }
        .footer ul li {
            margin-bottom: 10px;
        }
        .footer ul li a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color var(--transition);
        }
        .footer ul li a:hover {
            color: var(--accent);
        }
        .social-links {
            display: flex;
            gap: 14px;
            margin-top: 16px;
        }
        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-secondary);
            font-size: 16px;
            transition: all var(--transition);
            text-decoration: none;
        }
        .social-links a:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-2px);
        }
        @media (max-width: 768px) {
            .footer .container {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer {
                padding: 40px 0 32px;
            }
        }

        /* ===== 文章缺失状态 ===== */
        .empty-state {
            text-align: center;
            padding: 60px 20px;
            color: var(--text-secondary);
        }
        .empty-state i {
            font-size: 48px;
            color: var(--text-muted);
            margin-bottom: 16px;
            display: block;
        }
        .empty-state h3 {
            font-size: 20px;
            color: #fff;
            margin-bottom: 8px;
        }
        .empty-state p {
            font-size: 15px;
            color: var(--text-muted);
        }
        .empty-state .btn {
            margin-top: 20px;
        }

        /* ===== 响应式通用 ===== */
        @media (max-width: 576px) {
            .article-container {
                padding-left: 0;
                padding-right: 0;
            }
            .article-header h1 {
                font-size: 22px;
            }
            .article-body {
                font-size: 15px;
            }
            .article-body h2 {
                font-size: 20px;
            }
            .article-body h3 {
                font-size: 17px;
            }
            .related-section h2 {
                font-size: 20px;
            }
            .breadcrumb-section {
                padding: 20px 0 4px;
            }
            .breadcrumb {
                font-size: 13px;
            }
        }

        /* ===== 标签徽章 ===== */
        .tag-badge {
            display: inline-block;
            background: rgba(0, 180, 216, 0.15);
            color: var(--teal);
            font-size: 12px;
            font-weight: 500;
            padding: 2px 10px;
            border-radius: 4px;
            border: 1px solid rgba(0, 180, 216, 0.2);
        }

        /* ===== 文章页特殊分隔线 ===== */
        .article-divider {
            width: 60px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
            margin: 24px 0;
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--primary-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--text-muted);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--accent);
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0B1A2E;
            --primary-light: #13273F;
            --secondary: #00B4D8;
            --secondary-dark: #0096C7;
            --tertiary: #48CAE4;
            --bg: #050C18;
            --text: #E0E8F0;
            --text-secondary: #B0C4DE;
            --text-muted: #8899AA;
            --border-light: rgba(255, 255, 255, 0.10);
            --border-glass: rgba(255, 255, 255, 0.15);
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-bg-hover: rgba(255, 255, 255, 0.10);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 20px rgba(0, 180, 216, 0.5);
            --shadow-glow-hover: 0 0 30px rgba(0, 180, 216, 0.7);
            --transition: 0.3s ease;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--tertiary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }
        @media (max-width: 576px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ===== Typography ===== */
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            color: #ffffff;
            line-height: 1.3;
        }
        h1 {
            font-size: 36px;
        }
        h2 {
            font-size: 28px;
        }
        h3 {
            font-size: 22px;
        }
        h4 {
            font-size: 18px;
        }
        p {
            color: var(--text-secondary);
            margin-bottom: 1rem;
        }
        .text-muted {
            color: var(--text-muted) !important;
        }
        .section-padding {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 50px 0;
            }
            h1 {
                font-size: 28px;
            }
            h2 {
                font-size: 24px;
            }
            h3 {
                font-size: 20px;
            }
            h4 {
                font-size: 16px;
            }
        }
        @media (max-width: 576px) {
            .section-padding {
                padding: 40px 0;
            }
            h1 {
                font-size: 24px;
            }
            h2 {
                font-size: 22px;
            }
            h3 {
                font-size: 18px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ===== Navigation ===== */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            height: 70px;
            background: rgba(11, 26, 46, 0.85);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-light);
            padding: 0;
            transition: var(--transition);
        }
        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .navbar-brand {
            font-size: 22px;
            font-weight: 700;
            color: var(--secondary) !important;
            letter-spacing: 0.5px;
            padding: 0;
            margin: 0;
            line-height: 1;
        }
        .navbar-brand:hover {
            color: var(--tertiary) !important;
        }
        .navbar-nav {
            display: flex;
            align-items: center;
            gap: 0;
        }
        .nav-item {
            list-style: none;
        }
        .nav-link {
            color: var(--text-secondary) !important;
            font-size: 15px;
            font-weight: 500;
            padding: 8px 18px !important;
            border-radius: 4px;
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: #ffffff !important;
            background: rgba(255, 255, 255, 0.05);
        }
        .nav-link.active {
            color: #ffffff !important;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 18px;
            right: 18px;
            height: 2px;
            background: var(--secondary);
            border-radius: 2px;
        }
        .navbar-toggler {
            border: none;
            padding: 6px 10px;
            background: transparent;
            cursor: pointer;
            display: flex;
            flex-direction: column;
            gap: 5px;
            align-items: center;
            justify-content: center;
        }
        .navbar-toggler:focus {
            outline: none;
            box-shadow: none;
        }
        .toggler-icon {
            display: block;
            width: 24px;
            height: 2px;
            background: #ffffff;
            border-radius: 2px;
            transition: var(--transition);
        }
        .navbar-toggler[aria-expanded="true"] .toggler-icon:nth-child(1) {
            transform: rotate(45deg) translate(4px, 4px);
        }
        .navbar-toggler[aria-expanded="true"] .toggler-icon:nth-child(2) {
            opacity: 0;
        }
        .navbar-toggler[aria-expanded="true"] .toggler-icon:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: rgba(11, 26, 46, 0.98);
                backdrop-filter: blur(10px);
                -webkit-backdrop-filter: blur(10px);
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                padding: 16px 20px;
                margin-top: 0;
                border: 1px solid var(--border-light);
                border-top: none;
            }
            .navbar-nav {
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
            }
            .nav-link {
                padding: 12px 16px !important;
                border-radius: 8px;
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-link.active {
                background: rgba(0, 180, 216, 0.15);
                color: var(--secondary) !important;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            min-height: 100vh;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, #0B1A2E 0%, #1B2A45 100%);
            position: relative;
            overflow: hidden;
            padding-top: 70px;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            opacity: 0.20;
            mix-blend-mode: overlay;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            gap: 40px;
        }
        .hero-text {
            flex: 0 0 55%;
            max-width: 55%;
        }
        .hero-visual {
            flex: 0 0 45%;
            max-width: 45%;
        }
        .hero-title {
            font-size: 36px;
            font-weight: 700;
            color: #ffffff;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
            margin-bottom: 20px;
            line-height: 1.2;
        }
        .hero-subtitle {
            font-size: 18px;
            color: var(--text-secondary);
            line-height: 1.6;
            max-width: 500px;
            margin-bottom: 28px;
        }
        .hero-buttons {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .hero-image-wrapper {
            border-radius: var(--radius-xl);
            overflow: hidden;
            border: 2px solid rgba(255, 255, 255, 0.20);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
            background: rgba(255, 255, 255, 0.04);
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
        }
        .hero-image-wrapper img {
            width: 100%;
            height: auto;
            object-fit: cover;
            display: block;
        }
        @media (max-width: 991.98px) {
            .hero-content {
                flex-direction: column;
                text-align: center;
            }
            .hero-text {
                flex: 0 0 100%;
                max-width: 100%;
            }
            .hero-visual {
                flex: 0 0 100%;
                max-width: 100%;
            }
            .hero-subtitle {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }
            .hero-buttons {
                justify-content: center;
            }
            .hero-title {
                font-size: 30px;
            }
        }
        @media (max-width: 576px) {
            .hero-title {
                font-size: 24px;
            }
            .hero-subtitle {
                font-size: 16px;
            }
            .hero-buttons {
                flex-direction: column;
                align-items: center;
                gap: 12px;
            }
        }

        /* ===== Buttons ===== */
        .btn-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 36px;
            font-size: 16px;
            font-weight: 600;
            color: #ffffff;
            background: linear-gradient(135deg, #00B4D8, #0096C7);
            border: none;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-glow);
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
            line-height: 1.2;
        }
        .btn-glow:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow-hover);
            color: #ffffff;
        }
        .btn-glow:active {
            transform: translateY(0);
        }
        .btn-outline-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 13px 35px;
            font-size: 16px;
            font-weight: 600;
            color: var(--secondary);
            background: transparent;
            border: 2px solid var(--secondary);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
            line-height: 1.2;
        }
        .btn-outline-glow:hover {
            background: var(--secondary);
            color: #ffffff;
            transform: translateY(-2px);
            box-shadow: 0 0 20px rgba(0, 180, 216, 0.3);
        }
        .btn-outline-glow:active {
            transform: translateY(0);
        }
        @media (max-width: 576px) {
            .btn-glow,
            .btn-outline-glow {
                padding: 12px 28px;
                font-size: 15px;
                width: 100%;
                max-width: 280px;
            }
        }

        /* ===== Glass Card ===== */
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            height: 100%;
        }
        .glass-card:hover {
            transform: scale(1.02);
            box-shadow: var(--shadow-hover);
            background: var(--glass-bg-hover);
        }
        .glass-card .card-icon {
            font-size: 32px;
            color: var(--secondary);
            margin-bottom: 16px;
            display: inline-block;
        }
        .glass-card .card-title {
            font-size: 18px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 10px;
        }
        .glass-card .card-text {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ===== Section Headers ===== */
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            margin-bottom: 14px;
        }
        .section-header p {
            max-width: 680px;
            margin: 0 auto;
            color: var(--text-muted);
            font-size: 16px;
        }
        .section-header .accent-line {
            width: 50px;
            height: 3px;
            background: var(--secondary);
            border-radius: 3px;
            margin: 16px auto 0;
        }

        /* ===== Features / 核心优势 ===== */
        .features-section {
            background: var(--bg);
        }

        /* ===== Scenarios / 适用场景 ===== */
        .scenarios-section {
            background: linear-gradient(180deg, var(--bg) 0%, var(--primary) 100%);
        }
        .scenario-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 20px;
            border-radius: var(--radius-md);
            background: var(--glass-bg);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            height: 100%;
        }
        .scenario-item:hover {
            background: var(--glass-bg-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }
        .scenario-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: rgba(0, 180, 216, 0.15);
            color: var(--secondary);
            font-size: 20px;
        }
        .scenario-content h4 {
            font-size: 17px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 6px;
        }
        .scenario-content p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.5;
        }

        /* ===== Process / 实施流程 ===== */
        .process-section {
            background: var(--bg);
        }
        .process-step {
            text-align: center;
            padding: 24px 16px;
            position: relative;
        }
        .process-step .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
            color: #ffffff;
            font-size: 22px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 0 20px rgba(0, 180, 216, 0.3);
        }
        .process-step h4 {
            font-size: 17px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.5;
        }
        .process-arrow {
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--secondary);
            opacity: 0.5;
        }
        @media (max-width: 767.98px) {
            .process-arrow {
                transform: rotate(90deg);
                padding: 8px 0;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--primary);
        }
        .accordion {
            --bs-accordion-bg: transparent;
            --bs-accordion-border-color: var(--border-light);
            --bs-accordion-btn-color: #ffffff;
            --bs-accordion-btn-bg: transparent;
            --bs-accordion-active-bg: transparent;
            --bs-accordion-active-color: var(--secondary);
            --bs-accordion-body-color: var(--text-secondary);
            --bs-accordion-border-radius: var(--radius-md);
            --bs-accordion-inner-border-radius: var(--radius-md);
            --bs-accordion-btn-padding-x: 20px;
            --bs-accordion-btn-padding-y: 18px;
            --bs-accordion-body-padding-x: 20px;
            --bs-accordion-body-padding-y: 16px;
        }
        .accordion-item {
            background: transparent;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
        }
        .accordion-button {
            font-size: 16px;
            font-weight: 500;
            color: #ffffff;
            background: transparent;
            box-shadow: none !important;
            padding: 18px 20px;
        }
        .accordion-button::after {
            content: '+';
            background: none !important;
            font-size: 22px;
            font-weight: 300;
            color: var(--secondary);
            width: auto;
            height: auto;
            transform: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .accordion-button:not(.collapsed)::after {
            content: '−';
            transform: none;
            color: var(--tertiary);
        }
        .accordion-button:hover {
            background: rgba(255, 255, 255, 0.03);
        }
        .accordion-body {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            padding: 0 20px 16px;
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
        }
        .accordion-button:focus {
            box-shadow: none;
            outline: none;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0B1A2E 0%, #1B2A45 100%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-content {
            position: relative;
            z-index: 2;
        }
        .cta-title {
            font-size: 30px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 16px;
        }
        .cta-sub {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.6;
        }
        .cta-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
        }
        @media (max-width: 576px) {
            .cta-title {
                font-size: 24px;
            }
            .cta-sub {
                font-size: 15px;
            }
            .cta-buttons {
                flex-direction: column;
                align-items: center;
                gap: 12px;
            }
        }

        /* ===== Footer ===== */
        .footer {
            background: #050C18;
            border-top: 1px solid var(--border-light);
            padding: 56px 0 32px;
        }
        .footer .container {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1.2fr;
            gap: 40px;
        }
        .footer-brand {
            font-size: 20px;
            font-weight: 700;
            color: var(--secondary);
            display: block;
            margin-bottom: 12px;
        }
        .footer p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 10px;
        }
        .footer .copyright {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 16px;
        }
        .footer h5 {
            font-size: 16px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 16px;
        }
        .footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer ul li {
            margin-bottom: 8px;
        }
        .footer ul li a {
            font-size: 14px;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .footer ul li a:hover {
            color: var(--secondary);
        }
        .social-links {
            display: flex;
            gap: 14px;
            margin-top: 16px;
        }
        .social-links a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 16px;
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .social-links a:hover {
            background: var(--secondary);
            color: #ffffff;
            border-color: var(--secondary);
            transform: translateY(-2px);
        }
        @media (max-width: 991.98px) {
            .footer .container {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer .container> :first-child {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 576px) {
            .footer .container {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer {
                padding: 40px 0 24px;
            }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-nav {
            padding: 16px 0;
            background: transparent;
            border-bottom: 1px solid var(--border-light);
            margin-top: 70px;
        }
        .breadcrumb-nav .breadcrumb {
            margin: 0;
            padding: 0;
            background: transparent;
        }
        .breadcrumb-nav .breadcrumb-item {
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb-nav .breadcrumb-item a {
            color: var(--text-muted);
        }
        .breadcrumb-nav .breadcrumb-item a:hover {
            color: var(--secondary);
        }
        .breadcrumb-nav .breadcrumb-item.active {
            color: var(--secondary);
        }
        .breadcrumb-nav .breadcrumb-item+.breadcrumb-item::before {
            color: var(--text-muted);
            content: '/';
            padding: 0 8px;
        }

        /* ===== Utility ===== */
        .bg-deep {
            background: var(--bg);
        }
        .bg-primary-dark {
            background: var(--primary);
        }
        .text-secondary-custom {
            color: var(--secondary);
        }
        .mb-gap {
            margin-bottom: 24px;
        }
        .mt-gap {
            margin-top: 24px;
        }

        /* ===== Responsive refinements ===== */
        @media (max-width: 767.98px) {
            .hero-section {
                min-height: auto;
                padding: 100px 0 60px;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .glass-card {
                padding: 20px;
            }
            .scenario-item {
                padding: 16px;
            }
            .process-step {
                padding: 16px 8px;
            }
        }
        @media (max-width: 575.98px) {
            .glass-card .card-icon {
                font-size: 26px;
            }
            .glass-card .card-title {
                font-size: 16px;
            }
            .glass-card .card-text {
                font-size: 14px;
            }
            .accordion-button {
                font-size: 15px;
                padding: 14px 16px;
            }
            .accordion-body {
                font-size: 14px;
                padding: 0 16px 14px;
            }
            .hero-image-wrapper {
                border-radius: var(--radius-md);
            }
        }

/* roulang page: category2 */
/* ===== Design Variables ===== */
        :root {
            --color-primary: #0B1A2E;
            --color-primary-light: #13273F;
            --color-accent: #00B4D8;
            --color-accent-hover: #0096C7;
            --color-tertiary: #48CAE4;
            --color-bg: #050C18;
            --color-text: #E0E8F0;
            --color-text-secondary: #8899AA;
            --color-text-muted: #6B7C8E;
            --color-border: rgba(255, 255, 255, 0.1);
            --color-glass-bg: rgba(255, 255, 255, 0.06);
            --color-glass-border: rgba(255, 255, 255, 0.15);
            --glass-blur: 12px;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.4);
            --shadow-nav: 0 2px 10px rgba(0, 0, 0, 0.2);
            --shadow-button: 0 0 20px rgba(0, 180, 216, 0.5);
            --shadow-button-hover: 0 0 30px rgba(0, 180, 216, 0.7);
            --gradient-hero: linear-gradient(135deg, #0B1A2E 0%, #1B2A45 100%);
            --gradient-cta: linear-gradient(135deg, #0B1A2E 0%, #1B2A45 100%);
            --gradient-button: linear-gradient(135deg, #00B4D8, #0096C7);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
            --container-max: 1200px;
            --nav-height: 70px;
            --section-padding: 80px 0;
            --section-padding-mobile: 50px 0;
            --gutter: 30px;
            --gutter-mobile: 15px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.6;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--color-accent);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: var(--color-tertiary);
        }

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

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

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: #ffffff;
            margin-bottom: 0.5em;
        }
        h1 {
            font-size: 36px;
        }
        h2 {
            font-size: 28px;
        }
        h3 {
            font-size: 22px;
        }
        h4 {
            font-size: 18px;
        }
        p {
            margin-bottom: 1em;
            color: var(--color-text-secondary);
        }
        .text-small {
            font-size: 14px;
        }
        .text-xsmall {
            font-size: 12px;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            padding-left: var(--gutter);
            padding-right: var(--gutter);
            margin-left: auto;
            margin-right: auto;
        }
        @media (max-width: 768px) {
            .container {
                padding-left: var(--gutter-mobile);
                padding-right: var(--gutter-mobile);
            }
            h1 {
                font-size: 28px;
            }
            h2 {
                font-size: 24px;
            }
            h3 {
                font-size: 20px;
            }
            h4 {
                font-size: 16px;
            }
            :root {
                --section-padding: 50px 0;
            }
        }
        @media (max-width: 576px) {
            h1 {
                font-size: 24px;
            }
            h2 {
                font-size: 20px;
            }
            h3 {
                font-size: 18px;
            }
            :root {
                --section-padding: 40px 0;
            }
        }

        /* ===== Navbar ===== */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            height: var(--nav-height);
            background: rgba(11, 26, 46, 0.85);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--color-border);
            padding: 0;
            transition: background 0.3s ease;
        }
        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .navbar-brand {
            font-size: 22px;
            font-weight: 700;
            color: var(--color-accent) !important;
            letter-spacing: 0.5px;
            padding: 0;
            margin: 0;
            line-height: 1;
        }
        .navbar-brand:hover {
            color: var(--color-tertiary) !important;
        }
        .navbar-nav {
            display: flex;
            align-items: center;
            gap: 0;
        }
        .navbar-nav .nav-item {
            list-style: none;
        }
        .navbar-nav .nav-link {
            color: #B0C4DE;
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 4px;
            transition: color 0.3s ease, background 0.3s ease;
            position: relative;
            white-space: nowrap;
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link:focus {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.05);
        }
        .navbar-nav .nav-link.active {
            color: #ffffff;
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--color-accent);
            border-radius: 1px;
        }
        .navbar-nav .nav-item:not(:last-child)::after {
            content: '';
            display: inline-block;
            width: 1px;
            height: 20px;
            background: rgba(255, 255, 255, 0.1);
            margin: 0 4px;
            vertical-align: middle;
        }
        .navbar-toggler {
            border: none;
            padding: 8px 4px;
            background: transparent;
            display: flex;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
        }
        .navbar-toggler:focus {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .toggler-icon {
            display: block;
            width: 26px;
            height: 2px;
            background: #ffffff;
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .navbar-toggler[aria-expanded="true"] .toggler-icon:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .navbar-toggler[aria-expanded="true"] .toggler-icon:nth-child(2) {
            opacity: 0;
        }
        .navbar-toggler[aria-expanded="true"] .toggler-icon:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: rgba(11, 26, 46, 0.98);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                padding: 16px 20px;
                margin-top: 0;
                border: 1px solid var(--color-border);
                border-top: none;
            }
            .navbar-nav {
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
                width: 100%;
            }
            .navbar-nav .nav-link {
                padding: 10px 12px;
                width: 100%;
                border-radius: 6px;
            }
            .navbar-nav .nav-link.active::after {
                display: none;
            }
            .navbar-nav .nav-link.active {
                background: rgba(0, 180, 216, 0.15);
                color: var(--color-accent);
            }
            .navbar-nav .nav-item:not(:last-child)::after {
                display: none;
            }
        }

        /* ===== Hero Section (分类页) ===== */
        .category-hero {
            padding: 120px 0 80px;
            background: var(--gradient-hero);
            position: relative;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 180, 216, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .category-hero .container {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            gap: 40px;
        }
        .category-hero-text {
            flex: 1 1 55%;
        }
        .category-hero-text .breadcrumb {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-bottom: 16px;
            display: flex;
            gap: 8px;
            align-items: center;
            flex-wrap: wrap;
        }
        .category-hero-text .breadcrumb a {
            color: var(--color-text-secondary);
        }
        .category-hero-text .breadcrumb a:hover {
            color: var(--color-accent);
        }
        .category-hero-text .breadcrumb .sep {
            color: var(--color-text-muted);
        }
        .category-hero-text h1 {
            font-size: 38px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 16px;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
        }
        .category-hero-text p {
            font-size: 18px;
            color: #B0C4DE;
            line-height: 1.7;
            max-width: 580px;
            margin-bottom: 24px;
        }
        .category-hero-text .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .category-hero-text .hero-tags .tag {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(0, 180, 216, 0.15);
            color: var(--color-tertiary);
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            border: 1px solid rgba(0, 180, 216, 0.2);
        }
        .category-hero-image {
            flex: 0 0 40%;
            max-width: 400px;
        }
        .category-hero-image img {
            width: 100%;
            border-radius: var(--radius-xl);
            border: 2px solid rgba(255, 255, 255, 0.2);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
            object-fit: cover;
            aspect-ratio: 16/10;
        }
        @media (max-width: 991.98px) {
            .category-hero {
                padding: 100px 0 60px;
            }
            .category-hero .container {
                flex-direction: column;
                text-align: center;
            }
            .category-hero-text p {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }
            .category-hero-text .hero-tags {
                justify-content: center;
            }
            .category-hero-image {
                flex: 0 0 100%;
                max-width: 500px;
                margin-top: 24px;
            }
            .category-hero-text h1 {
                font-size: 30px;
            }
        }
        @media (max-width: 576px) {
            .category-hero-text h1 {
                font-size: 26px;
            }
            .category-hero-text p {
                font-size: 16px;
            }
        }

        /* ===== Section Common ===== */
        .section-block {
            padding: var(--section-padding);
        }
        .section-block .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-block .section-title h2 {
            font-size: 30px;
            margin-bottom: 12px;
        }
        .section-block .section-title p {
            font-size: 17px;
            max-width: 650px;
            margin: 0 auto;
            color: var(--color-text-secondary);
        }
        .section-block .section-title .title-accent {
            display: inline-block;
            width: 40px;
            height: 3px;
            background: var(--color-accent);
            border-radius: 2px;
            margin-top: 12px;
        }
        @media (max-width: 768px) {
            .section-block .section-title h2 {
                font-size: 26px;
            }
            .section-block .section-title p {
                font-size: 15px;
            }
        }

        /* ===== Glass Card ===== */
        .glass-card {
            background: var(--color-glass-bg);
            backdrop-filter: blur(var(--glass-blur));
            -webkit-backdrop-filter: blur(var(--glass-blur));
            border: 1px solid var(--color-glass-border);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .glass-card:hover {
            transform: translateY(-4px) scale(1.01);
            box-shadow: var(--shadow-card-hover);
        }
        .glass-card .card-icon {
            font-size: 32px;
            color: var(--color-accent);
            margin-bottom: 16px;
        }
        .glass-card h4 {
            font-size: 18px;
            margin-bottom: 8px;
            color: #ffffff;
        }
        .glass-card p {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-bottom: 0;
        }

        /* ===== Feature Grid ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        @media (max-width: 991.98px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .feature-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Steps / Timeline ===== */
        .steps-row {
            display: flex;
            gap: 30px;
            counter-reset: step-counter;
        }
        .step-item {
            flex: 1;
            background: var(--color-glass-bg);
            backdrop-filter: blur(var(--glass-blur));
            -webkit-backdrop-filter: blur(var(--glass-blur));
            border: 1px solid var(--color-glass-border);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            position: relative;
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }
        .step-item .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--gradient-button);
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 0 20px rgba(0, 180, 216, 0.3);
        }
        .step-item h4 {
            font-size: 17px;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-bottom: 0;
        }
        @media (max-width: 768px) {
            .steps-row {
                flex-direction: column;
                gap: 20px;
            }
        }

        /* ===== Config Options Grid ===== */
        .config-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .config-item {
            display: flex;
            gap: 20px;
            background: var(--color-glass-bg);
            backdrop-filter: blur(var(--glass-blur));
            -webkit-backdrop-filter: blur(var(--glass-blur));
            border: 1px solid var(--color-glass-border);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            align-items: flex-start;
        }
        .config-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
        }
        .config-item .config-icon {
            flex: 0 0 48px;
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(0, 180, 216, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--color-accent);
        }
        .config-item .config-text h4 {
            font-size: 17px;
            margin-bottom: 4px;
        }
        .config-item .config-text p {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-bottom: 0;
        }
        @media (max-width: 768px) {
            .config-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Case Cards ===== */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .case-card {
            background: var(--color-glass-bg);
            backdrop-filter: blur(var(--glass-blur));
            -webkit-backdrop-filter: blur(var(--glass-blur));
            border: 1px solid var(--color-glass-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .case-card:hover {
            transform: translateY(-4px) scale(1.01);
            box-shadow: var(--shadow-card-hover);
        }
        .case-card .case-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            display: block;
        }
        .case-card .case-body {
            padding: 20px 20px 24px;
        }
        .case-card .case-body h4 {
            font-size: 17px;
            margin-bottom: 6px;
        }
        .case-card .case-body p {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-bottom: 12px;
        }
        .case-card .case-body .case-tag {
            display: inline-block;
            padding: 2px 10px;
            background: rgba(0, 180, 216, 0.15);
            color: var(--color-tertiary);
            border-radius: 4px;
            font-size: 12px;
            font-weight: 500;
        }
        @media (max-width: 991.98px) {
            .case-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .case-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Accordion / FAQ ===== */
        .faq-accordion .accordion-item {
            background: transparent;
            border: none;
            border-bottom: 1px solid var(--color-border);
            border-radius: 0;
        }
        .faq-accordion .accordion-button {
            background: transparent;
            color: #ffffff;
            font-size: 16px;
            font-weight: 600;
            padding: 18px 0;
            box-shadow: none;
            border: none;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: color 0.3s ease;
        }
        .faq-accordion .accordion-button:hover,
        .faq-accordion .accordion-button:focus {
            color: var(--color-accent);
            background: transparent;
            box-shadow: none;
        }
        .faq-accordion .accordion-button::after {
            content: '+';
            background: none;
            font-size: 22px;
            font-weight: 300;
            color: var(--color-accent);
            width: auto;
            height: auto;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.3s ease;
        }
        .faq-accordion .accordion-button:not(.collapsed)::after {
            content: '−';
            transform: rotate(0deg);
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            color: var(--color-accent);
            background: transparent;
        }
        .faq-accordion .accordion-collapse {
            background: transparent;
        }
        .faq-accordion .accordion-body {
            padding: 0 0 20px;
            color: var(--color-text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: var(--gradient-cta);
            padding: 70px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -30%;
            left: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 180, 216, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -30%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(72, 202, 228, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 32px;
            margin-bottom: 16px;
            color: #ffffff;
        }
        .cta-section p {
            font-size: 18px;
            color: #B0C4DE;
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .cta-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-primary-custom {
            display: inline-block;
            padding: 14px 36px;
            background: var(--gradient-button);
            color: #ffffff;
            font-size: 16px;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-button);
            transition: all 0.3s ease;
            cursor: pointer;
            text-align: center;
        }
        .btn-primary-custom:hover,
        .btn-primary-custom:focus {
            transform: translateY(-2px);
            box-shadow: var(--shadow-button-hover);
            color: #ffffff;
            background: linear-gradient(135deg, #00B4D8, #0096C7);
        }
        .btn-secondary-custom {
            display: inline-block;
            padding: 13px 34px;
            background: transparent;
            color: var(--color-accent);
            font-size: 16px;
            font-weight: 600;
            border: 2px solid var(--color-accent);
            border-radius: var(--radius-sm);
            transition: all 0.3s ease;
            cursor: pointer;
            text-align: center;
        }
        .btn-secondary-custom:hover,
        .btn-secondary-custom:focus {
            background: var(--color-accent);
            color: #ffffff;
            transform: translateY(-2px);
            box-shadow: 0 0 20px rgba(0, 180, 216, 0.3);
        }
        @media (max-width: 576px) {
            .cta-section h2 {
                font-size: 26px;
            }
            .cta-section p {
                font-size: 16px;
            }
            .btn-primary-custom,
            .btn-secondary-custom {
                padding: 12px 28px;
                font-size: 15px;
                width: 100%;
                max-width: 280px;
            }
        }

        /* ===== Footer ===== */
        .footer {
            background: #050C18;
            padding: 60px 0 40px;
            border-top: 1px solid var(--color-border);
        }
        .footer .container {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 40px;
        }
        .footer .footer-brand {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-accent);
            display: block;
            margin-bottom: 8px;
        }
        .footer p {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-bottom: 8px;
            max-width: 360px;
        }
        .footer .copyright {
            font-size: 13px;
            color: var(--color-text-muted);
            margin-top: 16px;
        }
        .footer h5 {
            font-size: 15px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 16px;
        }
        .footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer ul li {
            margin-bottom: 10px;
        }
        .footer ul li a {
            color: var(--color-text-secondary);
            font-size: 14px;
            transition: color 0.3s ease;
        }
        .footer ul li a:hover {
            color: var(--color-accent);
        }
        .footer .social-links {
            display: flex;
            gap: 16px;
            margin-top: 16px;
        }
        .footer .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: var(--color-text-secondary);
            font-size: 18px;
            transition: all 0.3s ease;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer .social-links a:hover {
            background: var(--color-accent);
            color: #ffffff;
            border-color: var(--color-accent);
            transform: translateY(-2px);
        }
        @media (max-width: 768px) {
            .footer .container {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer p {
                max-width: 100%;
            }
            .footer .social-links {
                justify-content: flex-start;
            }
        }

        /* ===== Utility ===== */
        .bg-accent-light {
            background: rgba(0, 180, 216, 0.04);
        }
        .text-accent {
            color: var(--color-accent);
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-20 {
            gap: 20px;
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--color-bg);
        }
        ::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.15);
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: rgba(255, 255, 255, 0.25);
        }

        /* ===== Focus Visible ===== */
        :focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== Smooth Image Load ===== */
        img {
            background: rgba(255, 255, 255, 0.03);
        }

        /* ===== Config Detail Badge ===== */
        .badge-config {
            display: inline-block;
            padding: 3px 12px;
            background: rgba(0, 180, 216, 0.12);
            color: var(--color-tertiary);
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
            border: 1px solid rgba(0, 180, 216, 0.15);
        }