/* roulang page: index */
:root {
            --bg-primary: #0B101E;
            --bg-card: rgba(255, 255, 255, 0.06);
            --border-card: rgba(255, 255, 255, 0.10);
            --brand-blue: #1B3A6B;
            --accent-cyan: #2DE0C0;
            --signal-blue: #38BDF8;
            --text-primary: #E8ECF4;
            --text-secondary: #9AA7BD;
            --text-muted: #6B7A93;
            --radius-lg: 20px;
            --radius-md: 12px;
            --radius-sm: 10px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.25);
            --shadow-glow: 0 0 20px rgba(45, 224, 192, 0.35);
            --shadow-glow-hover: 0 0 30px rgba(45, 224, 192, 0.55);
            --divider-gradient: linear-gradient(90deg, transparent, rgba(45, 224, 192, 0.2), transparent);
        }

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

        ::selection {
            background: rgba(45, 224, 192, 0.3);
            color: #fff;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 15px;
            min-height: 100vh;
            overflow-x: hidden;
            position: relative;
        }

        body::before {
            content: "";
            position: fixed;
            top: -15%;
            right: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(ellipse, rgba(45, 224, 192, 0.07), transparent 70%);
            filter: blur(90px);
            z-index: -1;
            pointer-events: none;
        }

        body::after {
            content: "";
            position: fixed;
            bottom: -20%;
            left: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(ellipse, rgba(56, 189, 248, 0.05), transparent 70%);
            filter: blur(100px);
            z-index: -1;
            pointer-events: none;
        }

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

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

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

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

        /* ===== 顶部信息条 ===== */
        .topbar {
            background: #05080F;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            height: 38px;
            display: flex;
            align-items: center;
            font-size: 12px;
            color: var(--text-muted);
        }

        .topbar .domain {
            font-family: 'SF Mono', Consolas, monospace;
            letter-spacing: 0.3px;
        }

        .topbar .topbar-links {
            display: flex;
            align-items: center;
            gap: 18px;
        }

        .topbar .topbar-links span {
            transition: color 0.2s;
            cursor: default;
        }

        .topbar .topbar-links span:hover {
            color: var(--accent-cyan);
        }

        /* ===== 主导航 ===== */
        .main-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(11, 16, 30, 0.70);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background 0.3s, border-color 0.3s;
        }

        .main-header.scrolled {
            background: rgba(11, 16, 30, 0.88);
            border-bottom-color: rgba(45, 224, 192, 0.15);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
        }

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

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

        .brand-icon {
            width: 34px;
            height: 34px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .brand-text {
            font-size: 22px;
            font-weight: 700;
            letter-spacing: -0.3px;
            color: var(--text-primary);
            white-space: nowrap;
        }

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

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

        .main-nav a {
            font-size: 14px;
            color: var(--text-secondary);
            padding: 8px 0;
            position: relative;
            transition: color 0.2s;
            white-space: nowrap;
        }

        .main-nav a:hover {
            color: var(--accent-cyan);
        }

        .main-nav a.active {
            color: var(--accent-cyan);
            font-weight: 600;
        }

        .main-nav a.active::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: var(--shadow-glow);
        }

        .btn-cta {
            min-width: 96px;
            height: 36px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            background: linear-gradient(145deg, var(--accent-cyan), #16A085);
            color: #0B101E;
            transition: all 0.2s ease;
            flex-shrink: 0;
        }

        .btn-cta:hover {
            box-shadow: var(--shadow-glow);
            transform: translateY(-1px);
        }

        .btn-cta:active {
            transform: scale(0.97);
        }

        .menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--text-secondary);
            transition: background 0.2s;
        }

        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
            color: var(--accent-cyan);
        }

        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            width: 280px;
            max-width: 85vw;
            background: rgba(11, 16, 30, 0.96);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-left: 1px solid rgba(255, 255, 255, 0.08);
            z-index: 200;
            padding: 80px 24px 32px;
            transform: translateX(100%);
            transition: transform 0.3s ease;
            flex-direction: column;
            gap: 8px;
        }

        .mobile-drawer.open {
            transform: translateX(0);
        }

        .mobile-drawer a {
            font-size: 16px;
            line-height: 48px;
            color: var(--text-secondary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            transition: color 0.2s;
        }

        .mobile-drawer a:hover {
            color: var(--accent-cyan);
        }

        .mobile-drawer a.active {
            color: var(--accent-cyan);
            font-weight: 600;
        }

        .mobile-drawer .drawer-cta {
            margin-top: 24px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: linear-gradient(145deg, var(--accent-cyan), #16A085);
            color: #0B101E;
            font-weight: 600;
            line-height: normal;
        }

        .drawer-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 150;
            opacity: 0;
            transition: opacity 0.3s;
        }

        .drawer-overlay.show {
            opacity: 1;
        }

        /* ===== 通用按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 52px;
            padding: 0 30px;
            border-radius: 14px;
            font-size: 15px;
            font-weight: 600;
            background: linear-gradient(145deg, #1B3A6B, #0F1E3D);
            color: #fff;
            border: 1px solid rgba(45, 224, 192, 0.2);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
            transition: all 0.2s ease;
        }

        .btn-primary:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-glow);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 52px;
            padding: 0 30px;
            border-radius: 14px;
            font-size: 15px;
            font-weight: 500;
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.25);
            transition: all 0.2s ease;
        }

        .btn-secondary:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        .btn-secondary:active {
            transform: scale(0.98);
        }

        .btn-download {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            min-height: 56px;
            padding: 0 40px;
            border-radius: 14px;
            font-size: 16px;
            font-weight: 600;
            background: linear-gradient(145deg, var(--accent-cyan), #16A085);
            color: #0B101E;
            box-shadow: var(--shadow-glow);
            transition: all 0.2s ease;
            border: none;
        }

        .btn-download:hover {
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-2px);
        }

        .btn-download:active {
            transform: scale(0.98);
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            padding: 0 24px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border: 1px solid rgba(255, 255, 255, 0.15);
            transition: all 0.2s;
        }

        .btn-ghost:hover {
            color: var(--accent-cyan);
            border-color: var(--accent-cyan);
        }

        /* ===== 徽章 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 3px 10px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            border: 1px solid rgba(45, 224, 192, 0.25);
            color: var(--accent-cyan);
            background: rgba(45, 224, 192, 0.06);
            line-height: 1.6;
        }

        .badge-blue {
            border-color: rgba(56, 189, 248, 0.25);
            color: var(--signal-blue);
            background: rgba(56, 189, 248, 0.06);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 80px 0 70px;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(11, 16, 30, 0.92) 0%, rgba(11, 16, 30, 0.75) 60%, rgba(11, 16, 30, 0.40) 100%);
            pointer-events: none;
        }

        .hero::after {
            content: "";
            position: absolute;
            top: -80px;
            right: -60px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(45, 224, 192, 0.12), transparent 65%);
            filter: blur(80px);
            pointer-events: none;
        }

        .hero .hero-grid {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }

        .hero-badges {
            display: flex;
            gap: 10px;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .hero h1 {
            font-size: 44px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.5px;
            color: var(--text-primary);
            margin-bottom: 18px;
        }

        .hero h1 .highlight {
            color: var(--accent-cyan);
        }

        .hero-sub {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 480px;
            margin-bottom: 30px;
            line-height: 1.8;
        }

        .hero-btns {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 16px;
        }

        .hero-trust-note {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 36px;
        }

        .hero-trust-note a {
            color: var(--signal-blue);
            border-bottom: 1px dashed rgba(56, 189, 248, 0.3);
            transition: color 0.2s;
        }

        .hero-trust-note a:hover {
            color: var(--accent-cyan);
        }

        .trust-stats {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
        }

        .trust-stats .stat-num {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            font-variant-numeric: tabular-nums;
        }

        .trust-stats .stat-label {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 2px;
        }

        .hero-right {
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .phone-mock {
            width: 280px;
            border-radius: 36px;
            padding: 12px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.10);
            backdrop-filter: blur(12px);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
            transform: perspective(1200px) rotateY(-8deg) rotateX(2deg);
            transition: transform 0.4s ease;
        }

        .phone-mock:hover {
            transform: perspective(1200px) rotateY(-3deg) rotateX(0deg);
        }

        .phone-screen {
            border-radius: 26px;
            overflow: hidden;
            background: linear-gradient(160deg, #111A30, #0B101E);
        }

        .phone-screen img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }

        .phone-screen .screen-bar {
            padding: 12px 16px;
            background: rgba(255, 255, 255, 0.03);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .phone-screen .screen-bar .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.2);
        }

        .phone-screen .screen-content {
            padding: 20px 16px 28px;
            text-align: center;
        }

        .phone-screen .screen-content .mock-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .phone-screen .screen-content .mock-line {
            height: 8px;
            border-radius: 4px;
            background: rgba(255, 255, 255, 0.06);
            margin-bottom: 10px;
        }

        /* ===== 区块通用 ===== */
        .section {
            padding: 70px 0;
        }

        .section-alt {
            background: rgba(255, 255, 255, 0.02);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .section-title {
            display: flex;
            align-items: baseline;
            gap: 14px;
            margin-bottom: 40px;
        }

        .section-title .section-num {
            font-size: 16px;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: 1px;
        }

        .section-title h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.3px;
        }

        .section-title p {
            font-size: 14px;
            color: var(--text-muted);
            margin-left: auto;
        }

        .divider {
            height: 1px;
            background: var(--divider-gradient);
            border: none;
            margin: 0;
        }

        /* ===== 功能轮播 ===== */
        .carousel-wrap {
            position: relative;
        }

        .carousel {
            display: flex;
            gap: 20px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            padding-bottom: 20px;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .carousel::-webkit-scrollbar {
            display: none;
        }

        .carousel-card {
            flex: 0 0 310px;
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            overflow: hidden;
            scroll-snap-align: start;
            transition: all 0.3s ease;
        }

        .carousel-card:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(45, 224, 192, 0.3);
            transform: translateY(-4px);
        }

        .carousel-card .card-img {
            width: 100%;
            height: 180px;
            overflow: hidden;
            background: linear-gradient(135deg, rgba(27, 58, 107, 0.4), rgba(11, 16, 30, 0.8));
            position: relative;
        }

        .carousel-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.85;
        }

        .carousel-card .card-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(11, 16, 30, 0.5), transparent 50%);
        }

        .carousel-card .card-body {
            padding: 18px 20px 22px;
        }

        .carousel-card .card-body h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .carousel-card .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .carousel-nav {
            display: flex;
            gap: 10px;
            margin-bottom: 24px;
        }

        .carousel-nav .carousel-btn {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            transition: all 0.2s;
            background: rgba(255, 255, 255, 0.03);
        }

        .carousel-nav .carousel-btn:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: var(--shadow-glow);
        }

        /* ===== 系统要求卡 ===== */
        .req-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .req-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            padding: 28px 30px;
            transition: all 0.3s ease;
        }

        .req-card:hover {
            border-color: rgba(56, 189, 248, 0.25);
            background: rgba(255, 255, 255, 0.08);
        }

        .req-card .req-head {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 20px;
        }

        .req-card .req-head .req-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(56, 189, 248, 0.1);
            border: 1px solid rgba(56, 189, 248, 0.2);
        }

        .req-card .req-head h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-primary);
        }

        .req-card .req-head .req-version {
            margin-left: auto;
            font-size: 12px;
            color: var(--text-muted);
            background: rgba(255, 255, 255, 0.04);
            padding: 4px 10px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.06);
        }

        .req-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 14px;
        }

        .req-row:last-child {
            border-bottom: none;
        }

        .req-row .label {
            color: var(--text-muted);
        }

        .req-row .value {
            color: var(--text-primary);
            font-weight: 500;
        }

        /* ===== 评价墙 ===== */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .review-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            padding: 24px;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .review-card:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(45, 224, 192, 0.3);
            transform: translateY(-3px);
        }

        .review-card .review-head {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
        }

        .review-card .review-head .avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .review-card .review-head .avatar img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .review-card .review-head .reviewer-name {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-primary);
        }

        .review-card .review-head .stars {
            font-size: 13px;
            color: var(--accent-cyan);
            letter-spacing: 2px;
            margin-top: 2px;
        }

        .review-card .review-text {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
            margin-top: auto;
        }

        /* ===== 下载转化区 ===== */
        .download-section {
            position: relative;
            padding: 70px 0;
            background: linear-gradient(180deg, rgba(27, 58, 107, 0.15), rgba(11, 16, 30, 0.6));
            border-top: 1px solid rgba(45, 224, 192, 0.1);
            border-bottom: 1px solid rgba(45, 224, 192, 0.1);
            overflow: hidden;
        }

        .download-section::before {
            content: "";
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 700px;
            height: 300px;
            background: radial-gradient(ellipse, rgba(45, 224, 192, 0.08), transparent 65%);
            filter: blur(80px);
            pointer-events: none;
        }

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

        .download-section h2 {
            font-size: 34px;
            font-weight: 700;
            text-align: center;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .download-section .download-sub {
            text-align: center;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 40px;
        }

        .download-btns {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }

        .download-secondary {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 28px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }

        .qr-code-wrap {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
        }

        .qr-code {
            width: 120px;
            height: 120px;
            background: #fff;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255, 255, 255, 0.2);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
            position: relative;
            overflow: hidden;
        }

        .qr-code svg {
            width: 100%;
            height: 100%;
        }

        .qr-code-label {
            font-size: 12px;
            color: var(--text-muted);
        }

        .download-security {
            text-align: center;
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 16px;
        }

        .download-security svg {
            display: inline-block;
            vertical-align: -2px;
            margin-right: 4px;
        }

        /* ===== 资讯列表 ===== */
        .news-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }

        .news-card {
            display: flex;
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .news-card:hover {
            background: rgba(255, 255, 255, 0.09);
            border-color: rgba(45, 224, 192, 0.25);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }

        .news-card .news-cover {
            width: 38%;
            min-height: 160px;
            overflow: hidden;
            position: relative;
        }

        .news-card .news-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            inset: 0;
        }

        .news-card .news-cover::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, transparent, rgba(11, 16, 30, 0.15), transparent);
        }

        .news-card .news-info {
            padding: 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-card .news-info .news-cat {
            align-self: flex-start;
            margin-bottom: 8px;
        }

        .news-card .news-info h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card .news-info .news-summary {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card .news-meta {
            margin-top: auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: var(--text-muted);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding-top: 12px;
        }

        .news-card .news-meta .read-link {
            color: var(--signal-blue);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color 0.2s;
        }

        .news-card .news-meta .read-link:hover {
            color: var(--accent-cyan);
        }

        .news-empty {
            min-height: 220px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 12px;
            background: var(--bg-card);
            border: 1px dashed rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-lg);
            color: var(--text-muted);
            font-size: 14px;
        }

        .news-empty svg {
            opacity: 0.4;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            overflow: hidden;
            transition: box-shadow 0.3s, border-color 0.3s;
        }

        .faq-item:hover {
            border-color: rgba(45, 224, 192, 0.2);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
        }

        .faq-item.open {
            border-color: rgba(45, 224, 192, 0.3);
            box-shadow: var(--shadow-card);
        }

        .faq-q {
            width: 100%;
            min-height: 56px;
            padding: 14px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-primary);
            text-align: left;
            transition: color 0.2s;
        }

        .faq-q:hover {
            color: var(--accent-cyan);
        }

        .faq-q .faq-arrow {
            width: 24px;
            height: 24px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: var(--text-secondary);
            transition: all 0.3s ease;
        }

        .faq-item.open .faq-arrow {
            transform: rotate(45deg);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        .faq-a {
            max-height: 0;
            overflow: hidden;
            padding: 0 20px;
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
            transition: max-height 0.35s ease, padding 0.35s ease;
            border-top: 0 solid rgba(255, 255, 255, 0.04);
        }

        .faq-item.open .faq-a {
            max-height: 200px;
            padding: 14px 20px;
            border-top-width: 1px;
        }

        /* ===== 结尾CTA ===== */
        .cta-section {
            padding: 60px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            bottom: -100px;
            left: 50%;
            transform: translateX(-50%);
            width: 500px;
            height: 250px;
            background: radial-gradient(ellipse, rgba(45, 224, 192, 0.08), transparent 65%);
            filter: blur(80px);
            pointer-events: none;
        }

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

        .cta-section h2 {
            font-size: 30px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .cta-section p {
            color: var(--text-muted);
            font-size: 14px;
            margin-bottom: 30px;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: #05080F;
            border-top: 1px solid rgba(45, 224, 192, 0.08);
            padding: 50px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 1fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .footer-brand-block .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .footer-brand-block .footer-logo em {
            font-style: normal;
            color: var(--accent-cyan);
        }

        .footer-brand-block p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 280px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

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

        .footer-col .footer-links li {
            line-height: 32px;
            font-size: 14px;
        }

        .footer-col .footer-links a {
            color: var(--text-secondary);
            transition: color 0.2s;
        }

        .footer-col .footer-links a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            padding: 18px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .footer-bottom .footer-bottom-right {
            display: flex;
            gap: 20px;
        }

        .footer-bottom a {
            color: var(--text-muted);
            transition: color 0.2s;
        }

        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .main-nav {
                display: none;
            }

            .btn-cta {
                display: none;
            }

            .menu-toggle {
                display: flex;
            }

            .hero-grid {
                grid-template-columns: 1fr !important;
                gap: 40px !important;
            }

            .hero-right {
                order: -1;
                max-width: 260px;
                margin: 0 auto;
            }

            .phone-mock {
                width: 240px;
                transform: none;
            }

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

        @media (max-width: 768px) {
            .section {
                padding: 50px 0;
            }

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

            .section-title p {
                display: none;
            }

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

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

            .download-btns .btn-download {
                width: 100%;
                max-width: 280px;
            }

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

            .news-card .news-cover {
                width: 100%;
                height: 160px;
                min-height: auto;
            }

            .news-card .news-cover img {
                position: static;
                height: 160px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 30px;
            }

            .hero-btns {
                flex-direction: column;
                align-items: stretch;
            }

            .hero-btns .btn-primary,
            .hero-btns .btn-secondary {
                width: 100%;
            }

            .trust-stats {
                gap: 24px;
            }

            .trust-stats .stat-num {
                font-size: 20px;
            }

            .carousel-card {
                flex: 0 0 85vw;
            }

            .download-secondary {
                flex-direction: column;
                gap: 20px;
            }
        }

        @media (max-width: 375px) {
            .topbar .topbar-links span:nth-child(2) {
                display: none;
            }

            .brand-text {
                font-size: 19px;
            }

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

/* roulang page: category1 */
:root {
            --bg-deep: #0B101E;
            --bg-elevate: #0E1526;
            --brand-blue: #1B3A6B;
            --accent: #2DE0C0;
            --signal: #38BDF8;
            --text-main: #E8ECF4;
            --text-sub: #9AA7BD;
            --text-aux: #6B7A93;
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-border: rgba(255, 255, 255, 0.10);
            --radius-lg: 20px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.25);
            --shadow-glow: 0 0 20px rgba(45, 224, 192, 0.35);
            --shadow-glow-hover: 0 0 30px rgba(45, 224, 192, 0.55);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Inter, system-ui, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-sans);
            background: var(--bg-deep);
            color: var(--text-main);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        body::before {
            content: "";
            position: fixed;
            inset: 0;
            background-image:
                linear-gradient(rgba(45, 224, 192, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(45, 224, 192, 0.03) 1px, transparent 1px);
            background-size: 44px 44px;
            pointer-events: none;
            z-index: 0;
        }

        body::after {
            content: "";
            position: fixed;
            top: -160px;
            right: -120px;
            width: 520px;
            height: 520px;
            background: radial-gradient(ellipse, rgba(45, 224, 192, 0.14), rgba(56, 189, 248, 0.06) 55%, transparent 75%);
            filter: blur(80px);
            pointer-events: none;
            z-index: 0;
        }

        .container {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
            position: relative;
            z-index: 1;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease, border-color .2s ease, background .2s ease, box-shadow .2s ease, transform .2s ease;
        }

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

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

        input,
        textarea {
            font-family: inherit;
        }

        .glass-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            border-radius: 14px;
            padding: 14px 28px;
            font-size: 15px;
            line-height: 1.2;
            transition: all .2s ease;
            white-space: nowrap;
        }

        .btn-primary {
            background: linear-gradient(145deg, var(--signal), var(--accent));
            color: #06121F;
            box-shadow: var(--shadow-glow);
            min-height: 56px;
            border-radius: 14px;
        }

        .btn-primary:hover {
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-2px);
            filter: brightness(1.08);
        }

        .btn-primary:active {
            transform: scale(0.98);
            box-shadow: 0 0 12px rgba(45, 224, 192, 0.4);
        }

        .btn-secondary {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: var(--text-main);
            min-height: 56px;
            border-radius: 14px;
        }

        .btn-secondary:hover {
            border-color: var(--accent);
            color: var(--accent);
            box-shadow: 0 0 18px rgba(45, 224, 192, 0.2);
            transform: translateY(-2px);
        }

        .btn-cta {
            min-width: 96px;
            height: 36px;
            padding: 0 18px;
            font-size: 14px;
            background: linear-gradient(145deg, rgba(45, 224, 192, 0.16), rgba(56, 189, 248, 0.14));
            border: 1px solid rgba(45, 224, 192, 0.45);
            color: var(--accent);
            border-radius: 10px;
            box-shadow: none;
        }

        .btn-cta:hover {
            background: rgba(45, 224, 192, 0.22);
            box-shadow: 0 0 16px rgba(45, 224, 192, 0.25);
            transform: translateY(-1px);
        }

        .section-overline {
            display: inline-block;
            font-size: 13px;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: var(--accent);
            border: 1px solid rgba(45, 224, 192, 0.35);
            padding: 5px 14px;
            border-radius: 999px;
            background: rgba(45, 224, 192, 0.06);
            margin-bottom: 14px;
        }

        h1,
        h2,
        h3,
        h4 {
            margin: 0 0 0.5em;
            line-height: 1.3;
            font-weight: 700;
            letter-spacing: -0.5px;
        }

        h1 {
            font-size: clamp(30px, 4vw, 46px);
        }

        h2 {
            font-size: clamp(26px, 3vw, 34px);
        }

        h3 {
            font-size: clamp(20px, 2vw, 24px);
            font-weight: 600;
        }

        p {
            margin: 0 0 1.2em;
        }

        .section-head {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-head p {
            color: var(--text-sub);
            max-width: 560px;
            margin: 0 auto;
            font-size: 16px;
        }

        .top-bar {
            background: #05080F;
            min-height: 38px;
            display: flex;
            align-items: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .top-bar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .top-bar-domain {
            font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
            font-size: 12.5px;
            color: var(--text-aux);
            letter-spacing: 0.04em;
        }

        .top-bar-links {
            display: flex;
            gap: 22px;
            align-items: center;
        }

        .top-bar-links a {
            font-size: 13px;
            color: var(--text-sub);
            transition: color .2s;
        }

        .top-bar-links a:hover {
            color: var(--accent);
        }

        .main-nav {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(11, 16, 30, 0.62);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background .3s ease, box-shadow .3s ease;
        }

        .main-nav.scrolled {
            background: rgba(11, 16, 30, 0.88);
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.35);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 20px;
        }

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

        .brand svg {
            flex-shrink: 0;
        }

        .brand-name {
            font-size: 20px;
            font-weight: 700;
            letter-spacing: -0.3px;
            color: var(--text-main);
        }

        .brand-name em {
            font-style: normal;
            color: var(--accent);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 30px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links a {
            position: relative;
            font-size: 15px;
            color: var(--text-sub);
            padding: 8px 2px;
            font-weight: 500;
        }

        .nav-links a::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: width .25s ease;
        }

        .nav-links a:hover {
            color: var(--text-main);
        }

        .nav-links a:hover::after {
            width: 100%;
        }

        .nav-links a.active {
            color: var(--accent);
        }

        .nav-links a.active::after {
            width: 100%;
        }

        .nav-cta {
            margin-left: auto;
            display: flex;
            align-items: center;
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            align-items: center;
            justify-content: center;
            color: var(--text-main);
            font-size: 20px;
            background: rgba(255, 255, 255, 0.04);
            transition: border-color .2s;
        }

        .nav-toggle:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

        .category-hero {
            position: relative;
            padding: 96px 0 84px;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }

        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(11, 16, 30, 0.96) 0%, rgba(11, 16, 30, 0.82) 55%, rgba(15, 30, 61, 0.68) 100%);
            z-index: 0;
        }

        .category-hero::after {
            content: "";
            position: absolute;
            top: -80px;
            right: 6%;
            width: 420px;
            height: 320px;
            background: radial-gradient(ellipse, rgba(56, 189, 248, 0.22), transparent 70%);
            filter: blur(70px);
            z-index: 0;
            pointer-events: none;
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 500;
            color: var(--accent);
            border: 1px solid rgba(45, 224, 192, 0.35);
            border-radius: 999px;
            padding: 6px 16px;
            background: rgba(45, 224, 192, 0.05);
            margin-bottom: 22px;
        }

        .hero-badge i {
            font-size: 12px;
        }

        .category-hero h1 {
            max-width: 780px;
            margin-bottom: 18px;
        }

        .category-hero .lead {
            max-width: 720px;
            font-size: 17px;
            color: var(--text-sub);
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            margin-bottom: 42px;
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 36px;
            padding-top: 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .hero-stats .stat {
            display: flex;
            flex-direction: column;
        }

        .hero-stats .stat strong {
            font-size: 22px;
            color: var(--text-main);
            font-weight: 700;
        }

        .hero-stats .stat span {
            font-size: 13px;
            color: var(--text-aux);
            margin-top: 2px;
        }

        .guide-section {
            padding: 80px 0;
            position: relative;
            z-index: 1;
        }

        .guide-list {
            display: flex;
            flex-direction: column;
            gap: 48px;
        }

        .guide-card {
            display: flex;
            align-items: center;
            gap: 44px;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: transform .3s ease, border-color .3s ease, background .3s ease;
            position: relative;
            overflow: hidden;
        }

        .guide-card::before {
            content: "";
            position: absolute;
            width: 220px;
            height: 220px;
            background: radial-gradient(circle, rgba(45, 224, 192, 0.08), transparent 70%);
            filter: blur(50px);
            pointer-events: none;
            border-radius: 50%;
            z-index: 0;
        }

        .guide-card.guide-odd::before {
            top: -60px;
            left: 10%;
        }

        .guide-card.guide-even::before {
            bottom: -60px;
            right: 10%;
        }

        .guide-card:hover {
            transform: translateY(-4px);
            border-color: rgba(45, 224, 192, 0.35);
            background: rgba(255, 255, 255, 0.09);
        }

        .guide-media {
            flex: 0 0 44%;
            border-radius: var(--radius-md);
            overflow: hidden;
            position: relative;
            z-index: 1;
            border: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        }

        .guide-media img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
            transition: transform .5s ease;
        }

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

        .guide-content {
            flex: 1;
            min-width: 0;
            position: relative;
            z-index: 1;
        }

        .guide-tag {
            display: inline-block;
            font-size: 12.5px;
            font-weight: 600;
            color: var(--signal);
            background: rgba(56, 189, 248, 0.1);
            border: 1px solid rgba(56, 189, 248, 0.25);
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 16px;
        }

        .guide-content h3 {
            margin-bottom: 12px;
        }

        .guide-content p {
            color: var(--text-sub);
            font-size: 15px;
            margin-bottom: 20px;
            line-height: 1.8;
        }

        .guide-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--accent);
            font-size: 14px;
            font-weight: 600;
            border-bottom: 1px solid rgba(45, 224, 192, 0.3);
            padding-bottom: 3px;
            transition: border-color .2s, gap .2s;
        }

        .guide-link:hover {
            border-color: var(--accent);
            gap: 12px;
        }

        .guide-link i {
            font-size: 12px;
        }

        .banner-cta {
            padding: 24px 0 80px;
            position: relative;
            z-index: 1;
        }

        .banner-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            padding: 36px 44px;
            flex-wrap: wrap;
            background:
                radial-gradient(circle at 80% 20%, rgba(45, 224, 192, 0.16), transparent 45%),
                var(--glass-bg);
        }

        .banner-info h3 {
            margin-bottom: 6px;
            font-size: 22px;
        }

        .banner-info p {
            margin: 0;
            color: var(--text-sub);
            font-size: 15px;
        }

        .faq-section {
            padding: 80px 0;
            position: relative;
            z-index: 1;
        }

        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color .25s ease, box-shadow .25s ease;
        }

        .faq-item:hover {
            border-color: rgba(45, 224, 192, 0.2);
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(0, 0, 0, 0.22);
        }

        .faq-item.open {
            border-color: rgba(45, 224, 192, 0.3);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            padding: 0 24px;
            min-height: 60px;
            font-size: 15px;
            font-weight: 600;
            text-align: left;
            color: var(--text-main);
            transition: background .2s;
        }

        .faq-question:hover {
            background: rgba(255, 255, 255, 0.03);
        }

        .faq-icon {
            position: relative;
            width: 28px;
            height: 28px;
            flex-shrink: 0;
        }

        .faq-icon::before,
        .faq-icon::after {
            content: "";
            position: absolute;
            background: var(--accent);
            border-radius: 2px;
            transition: transform .3s ease, opacity .3s ease;
        }

        .faq-icon::before {
            top: 13px;
            left: 5px;
            width: 18px;
            height: 2px;
        }

        .faq-icon::after {
            top: 5px;
            left: 13px;
            width: 2px;
            height: 18px;
        }

        .faq-item.open .faq-icon::after {
            transform: scaleY(0);
            opacity: 0;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease, padding .35s ease;
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.75;
            padding: 0 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 220px;
            padding: 0 24px 22px;
        }

        .cta-section {
            padding: 70px 0 90px;
            position: relative;
            z-index: 1;
        }

        .cta-card {
            background:
                radial-gradient(ellipse at 50% 0%, rgba(45, 224, 192, 0.18), transparent 60%),
                var(--glass-bg);
            border: 1px solid rgba(45, 224, 192, 0.25);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-radius: 24px;
            text-align: center;
            padding: 64px 24px;
            box-shadow: 0 0 40px rgba(45, 224, 192, 0.14), var(--shadow-card);
            position: relative;
            overflow: hidden;
        }

        .cta-card::before {
            content: "";
            position: absolute;
            top: -120px;
            left: 50%;
            transform: translateX(-50%);
            width: 420px;
            height: 240px;
            background: radial-gradient(ellipse, rgba(56, 189, 248, 0.2), transparent 70%);
            filter: blur(55px);
            pointer-events: none;
        }

        .cta-card h2 {
            font-size: clamp(28px, 3.4vw, 38px);
            margin-bottom: 12px;
        }

        .cta-card p {
            color: var(--text-sub);
            font-size: 16px;
            margin-bottom: 32px;
        }

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

        .footer {
            background: #05080F;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 66px 0 30px;
            position: relative;
            z-index: 1;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 44px;
        }

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

        .footer-logo em {
            font-style: normal;
            color: var(--accent);
        }

        .footer-brand-block p {
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.75;
            margin: 0;
            max-width: 340px;
        }

        .footer-col h4 {
            font-size: 15px;
            color: var(--text-main);
            font-weight: 600;
            margin-bottom: 16px;
        }

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

        .footer-links li {
            line-height: 32px;
        }

        .footer-links a {
            font-size: 14px;
            color: var(--text-sub);
            transition: color .2s, padding-left .2s;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-aux);
        }

        .footer-bottom-right {
            display: flex;
            gap: 18px;
        }

        .footer-bottom-right span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12.5px;
            color: var(--text-sub);
        }

        @media (max-width: 1024px) {
            .guide-card {
                gap: 28px;
            }

            .hero-stats {
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            .main-nav.scrolled {
                background: rgba(11, 16, 30, 0.92);
            }

            .nav-links {
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(11, 16, 30, 0.96);
                backdrop-filter: blur(18px);
                -webkit-backdrop-filter: blur(18px);
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 12px 20px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                display: none;
                max-height: calc(100vh - 80px);
                overflow-y: auto;
            }

            .nav-links a {
                display: block;
                padding: 16px 6px;
                font-size: 16px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            }

            .nav-links a::after {
                display: none;
            }

            .nav-links a.active {
                color: var(--accent);
            }

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

            .nav-cta {
                display: none;
            }

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

            .top-bar-links a:not(:last-child) {
                display: none;
            }

            .category-hero {
                padding: 64px 0 56px;
            }

            .hero-actions {
                gap: 12px;
            }

            .guide-card {
                flex-direction: column;
                padding: 18px;
            }

            .guide-media {
                flex: 0 0 auto;
                width: 100%;
            }

            .banner-inner {
                padding: 30px 24px;
                flex-direction: column;
                text-align: center;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

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

            .top-bar-inner {
                gap: 8px;
            }

            .top-bar-domain {
                font-size: 11.5px;
            }

            .top-bar-links {
                gap: 10px;
            }

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

            .category-hero h1 {
                font-size: 28px;
            }

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

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

            .guide-card {
                padding: 16px;
            }

            .faq-question {
                font-size: 14px;
                padding: 0 18px;
                min-height: 56px;
            }

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

            .cta-section {
                padding: 56px 0 64px;
            }

            .cta-card {
                padding: 44px 18px;
            }

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

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

/* roulang page: article */
:root {
            --bg-deep: #0B101E;
            --bg-panel: rgba(255, 255, 255, 0.06);
            --border-soft: rgba(255, 255, 255, 0.10);
            --brand-blue: #1B3A6B;
            --accent-cyan: #2DE0C0;
            --signal-blue: #38BDF8;
            --text-main: #E8ECF4;
            --text-secondary: #9AA7BD;
            --text-muted: #6B7A93;
            --radius-lg: 20px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.25);
            --glow-cyan: 0 0 20px rgba(45, 224, 192, 0.35);
            --glow-cyan-hover: 0 0 30px rgba(45, 224, 192, 0.55);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Inter, system-ui, sans-serif;
            --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-deep);
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 44px 44px;
            background-attachment: fixed;
            color: var(--text-main);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            min-height: 100vh;
        }

        body::before {
            content: "";
            position: fixed;
            top: -180px;
            left: 5%;
            width: 640px;
            height: 460px;
            background: radial-gradient(ellipse, rgba(45, 224, 192, 0.13), transparent 70%);
            pointer-events: none;
            z-index: -1;
        }

        body::after {
            content: "";
            position: fixed;
            bottom: -160px;
            right: 2%;
            width: 560px;
            height: 420px;
            background: radial-gradient(ellipse, rgba(56, 189, 248, 0.12), transparent 70%);
            pointer-events: none;
            z-index: -1;
        }

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

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

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

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4 {
            font-weight: 700;
            line-height: 1.3;
        }

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

        /* ---------- Buttons ---------- */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 24px;
            border-radius: 12px;
            font-weight: 600;
            font-size: 15px;
            line-height: 1;
            border: 1px solid transparent;
            transition: all 0.3s ease;
            cursor: pointer;
            text-align: center;
            white-space: nowrap;
        }

        .btn:active {
            transform: scale(0.98);
        }

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

        .btn-primary {
            background: linear-gradient(145deg, #1B3A6B, #0F1E3D);
            color: #fff;
            border-color: rgba(45, 224, 192, 0.35);
            box-shadow: var(--glow-cyan);
        }

        .btn-primary:hover {
            background: linear-gradient(145deg, #22509b, #16294f);
            box-shadow: var(--glow-cyan-hover);
            transform: translateY(-1px);
            color: #fff;
        }

        .btn-ghost {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.25);
            color: var(--text-main);
        }

        .btn-ghost:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        .btn-outline {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: var(--text-secondary);
        }

        .btn-outline:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        .btn-block {
            display: flex;
            width: 100%;
        }

        .btn-lg {
            padding: 16px 32px;
            font-size: 16px;
            min-height: 56px;
            border-radius: 14px;
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 14px;
            height: 36px;
            border-radius: 10px;
        }

        /* ---------- Badge ---------- */
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            color: var(--accent-cyan);
            border: 1px solid rgba(45, 224, 192, 0.35);
            background: rgba(45, 224, 192, 0.06);
            line-height: 1.4;
        }

        /* ---------- Topbar ---------- */
        .topbar {
            background: #05080F;
            color: var(--text-secondary);
            font-size: 13px;
            height: 38px;
            display: flex;
            align-items: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .topbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .topbar-domain {
            font-family: var(--font-mono);
            color: var(--text-muted);
            letter-spacing: 0.02em;
        }

        .topbar-actions {
            display: flex;
            align-items: center;
            gap: 24px;
        }

        .topbar-link {
            color: var(--text-secondary);
            transition: color 0.3s ease;
            font-size: 13px;
        }

        .topbar-link:hover {
            color: var(--accent-cyan);
        }

        /* ---------- Main Header ---------- */
        .main-header {
            position: sticky;
            top: 0;
            z-index: 100;
            height: 72px;
            display: flex;
            align-items: center;
            background: rgba(11, 16, 30, 0.6);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background 0.3s ease;
        }

        .main-header.scrolled {
            background: rgba(11, 16, 30, 0.85);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            height: 100%;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 20px;
            color: var(--text-main);
            letter-spacing: -0.2px;
        }

        .brand-logo em {
            font-style: normal;
            color: var(--accent-cyan);
        }

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

        .main-nav a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 2px;
            position: relative;
            transition: color 0.3s ease;
        }

        .main-nav a:hover {
            color: var(--text-main);
        }

        .main-nav a.active {
            color: var(--accent-cyan);
        }

        .main-nav a.active::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 2px;
            border-radius: 2px;
            background: var(--accent-cyan);
            box-shadow: 0 0 10px rgba(45, 224, 192, 0.6);
        }

        .header-cta .btn {
            min-width: 96px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }

        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-nav {
            display: none;
            background: rgba(11, 16, 30, 0.97);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 12px 20px 20px;
        }

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

        .mobile-nav a {
            display: block;
            font-size: 16px;
            line-height: 48px;
            color: var(--text-main);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .mobile-nav a:last-child {
            border-bottom: none;
        }

        .mobile-nav a.active {
            color: var(--accent-cyan);
            font-weight: 600;
        }

        /* ---------- Breadcrumb ---------- */
        .article-breadcrumb {
            background: linear-gradient(rgba(11, 16, 30, 0.84), rgba(11, 16, 30, 0.84)),
                url('/assets/images/backpic/back-1.png') center / cover no-repeat;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            padding: 28px 0 24px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color 0.3s ease;
        }

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

        .breadcrumb-sep {
            color: rgba(255, 255, 255, 0.2);
        }

        .breadcrumb-current {
            color: var(--text-secondary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            max-width: 320px;
        }

        /* ---------- Article Layout ---------- */
        .article-section {
            padding: 40px 0 48px;
        }

        .article-grid {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 320px;
            gap: 32px;
            align-items: start;
        }

        .article-main {
            max-width: 720px;
            width: 100%;
            min-width: 0;
            justify-self: center;
        }

        .article-card {
            background: var(--bg-panel);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-lg);
            padding: 36px;
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .article-header {
            margin-bottom: 28px;
            padding-bottom: 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .article-header h1 {
            font-size: 36px;
            line-height: 1.25;
            font-weight: 700;
            letter-spacing: -0.4px;
            margin-bottom: 16px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 20px;
            color: var(--text-muted);
            font-size: 13px;
            align-items: center;
        }

        .article-meta .meta-sep {
            width: 1px;
            height: 14px;
            background: rgba(255, 255, 255, 0.12);
        }

        /* ---------- Article Content Typography ---------- */
        .article-content {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-main);
        }

        .article-content p {
            margin: 1.4em 0;
            line-height: 1.8;
        }

        .article-content h2 {
            font-size: 26px;
            font-weight: 700;
            margin: 1.8em 0 0.6em;
            color: var(--text-main);
            letter-spacing: -0.2px;
        }

        .article-content h3 {
            font-size: 20px;
            font-weight: 600;
            margin: 1.5em 0 0.5em;
            color: var(--text-main);
        }

        .article-content a {
            color: var(--accent-cyan);
            text-decoration: underline;
            text-underline-offset: 4px;
            transition: opacity 0.3s ease;
        }

        .article-content a:hover {
            opacity: 0.8;
        }

        .article-content blockquote {
            border-left: 3px solid var(--accent-cyan);
            background: rgba(45, 224, 192, 0.06);
            padding: 14px 20px;
            border-radius: 0 12px 12px 0;
            margin: 1.6em 0;
            color: var(--text-secondary);
        }

        .article-content ul,
        .article-content ol {
            margin: 1.2em 0;
            padding-left: 1.6em;
            line-height: 1.8;
        }

        .article-content ul li {
            list-style: disc;
        }

        .article-content ol li {
            list-style: decimal;
        }

        .article-content img {
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.10);
            margin: 1.4em auto;
            height: auto;
        }

        .article-content figure {
            margin: 1.4em 0;
        }

        .article-content figcaption {
            text-align: center;
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 8px;
        }

        .article-content code {
            background: rgba(56, 189, 248, 0.12);
            padding: 2px 8px;
            border-radius: 6px;
            font-family: var(--font-mono);
            font-size: 0.88em;
            color: var(--signal-blue);
        }

        .article-content pre {
            background: #0D1526;
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 12px;
            padding: 18px 20px;
            overflow-x: auto;
            margin: 1.6em 0;
            line-height: 1.7;
        }

        .article-content pre code {
            background: none;
            padding: 0;
            color: var(--text-main);
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.4em 0;
            font-size: 15px;
        }

        .article-content th,
        .article-content td {
            border: 1px solid rgba(255, 255, 255, 0.10);
            padding: 10px 14px;
            text-align: left;
        }

        .article-content th {
            background: rgba(255, 255, 255, 0.05);
            font-weight: 600;
        }

        /* ---------- Article Actions ---------- */
        .article-actions {
            display: flex;
            justify-content: center;
            margin: 32px 0 8px;
        }

        /* ---------- Related ---------- */
        .related-section {
            margin-top: 40px;
        }

        .section-heading {
            text-align: center;
            margin-bottom: 28px;
        }

        .section-heading h2 {
            font-size: 30px;
            font-weight: 700;
            letter-spacing: -0.3px;
        }

        .section-heading p {
            color: var(--text-secondary);
            font-size: 14px;
            margin-top: 6px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--bg-panel);
            border: 1px solid var(--border-soft);
            border-radius: 16px;
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            transform: translateY(-4px);
            border-color: rgba(45, 224, 192, 0.5);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
        }

        .related-thumb {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: rgba(255, 255, 255, 0.03);
        }

        .related-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border: none;
            border-radius: 0;
        }

        .related-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }

        .related-body h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.4;
            transition: color 0.3s ease;
        }

        .related-card:hover .related-body h3 {
            color: var(--accent-cyan);
        }

        .related-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ---------- Sidebar ---------- */
        .article-sidebar {
            min-width: 0;
        }

        .sidebar-card {
            background: var(--bg-panel);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-lg);
            padding: 24px;
            margin-bottom: 24px;
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .sidebar-card h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--text-main);
        }

        .sidebar-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
        }

        .sidebar-links li {
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .sidebar-links li:last-child {
            border-bottom: none;
        }

        .sidebar-links a {
            display: flex;
            align-items: center;
            font-size: 14px;
            line-height: 40px;
            color: var(--text-secondary);
            transition: color 0.3s ease, padding-left 0.3s ease;
        }

        .sidebar-links a:hover {
            color: var(--accent-cyan);
            padding-left: 6px;
        }

        .sidebar-shield {
            background: linear-gradient(145deg, rgba(45, 224, 192, 0.08), rgba(56, 189, 248, 0.04));
            border-color: rgba(45, 224, 192, 0.25);
        }

        .shield-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: rgba(45, 224, 192, 0.12);
            border: 1px solid rgba(45, 224, 192, 0.35);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 14px;
        }

        /* ---------- CTA ---------- */
        .cta-section {
            padding: 16px 0 64px;
        }

        .cta-block {
            background: linear-gradient(145deg, rgba(27, 58, 107, 0.55), rgba(15, 30, 61, 0.7)),
                url('/assets/images/backpic/back-2.png') center / cover no-repeat;
            border: 1px solid rgba(45, 224, 192, 0.25);
            border-radius: var(--radius-lg);
            padding: 48px 32px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .cta-block::before {
            content: "";
            position: absolute;
            width: 300px;
            height: 300px;
            background: rgba(45, 224, 192, 0.15);
            filter: blur(90px);
            border-radius: 50%;
            top: -80px;
            right: -60px;
            pointer-events: none;
        }

        .cta-block h2 {
            font-size: 30px;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
            position: relative;
            z-index: 1;
        }

        .cta-block p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
        }

        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        /* ---------- Not Found ---------- */
        .not-found-card {
            max-width: 640px;
            margin: 48px auto;
            text-align: center;
            background: var(--bg-panel);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-lg);
            padding: 48px 32px;
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .not-found-card h2 {
            font-size: 28px;
            margin-bottom: 12px;
        }

        .not-found-card p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        /* ---------- Footer ---------- */
        .footer {
            background: #05080F;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 56px 0 0;
            position: relative;
            z-index: 1;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 20px;
            color: var(--text-main);
            margin-bottom: 14px;
        }

        .footer-logo em {
            font-style: normal;
            color: var(--accent-cyan);
        }

        .footer-brand-block p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-muted);
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 16px;
        }

        .footer-links li {
            line-height: 32px;
        }

        .footer-links a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color 0.3s ease;
        }

        .footer-links a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding: 20px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 13px;
            color: var(--text-muted);
        }

        .footer-bottom-right {
            display: flex;
            gap: 18px;
        }

        /* ---------- Responsive ---------- */
        @media (max-width: 1024px) {
            .article-grid {
                grid-template-columns: 1fr;
            }

            .article-main {
                max-width: 760px;
            }

            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }

            .sidebar-card {
                margin-bottom: 0;
            }
        }

        @media (max-width: 900px) {
            .main-nav,
            .header-cta {
                display: none;
            }

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

            .mobile-nav {
                display: none;
            }

            .mobile-nav.open {
                display: block;
                position: relative;
                z-index: 99;
            }
        }

        @media (max-width: 768px) {
            .article-card {
                padding: 24px;
            }

            .article-header h1 {
                font-size: 28px;
            }

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

            .cta-block {
                padding: 36px 20px;
            }

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .topbar-actions {
                gap: 14px;
            }

            .topbar-actions a:not(:first-child) {
                display: none;
            }
        }

        @media (max-width: 640px) {
            .article-section {
                padding: 24px 0 32px;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
            }

            .related-grid {
                gap: 16px;
            }

            .cta-buttons {
                flex-direction: column;
                align-items: stretch;
            }

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

            .breadcrumb-current {
                max-width: 200px;
            }
        }

        @media (max-width: 375px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .article-card {
                padding: 18px;
            }

            .btn-lg {
                padding: 14px 20px;
                font-size: 15px;
            }
        }