/* roulang page: index */
:root {
            --bg: #0A0F1F;
            --bg-secondary: #151B34;
            --bg-footer: #080C18;
            --accent: #38E1FF;
            --accent-dark: #31C8F2;
            --frost: #EAF6FF;
            --muted: #8A9BB5;
            --amber: #F5B841;
            --border: rgba(138, 155, 181, 0.15);
            --radius: 14px;
            --shadow-neon: 0 0 24px rgba(56, 225, 255, 0.15);
            --transition: 0.25s ease;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            background: var(--bg);
            color: var(--frost);
            line-height: 1.8;
            margin: 0;
            overflow-x: hidden;
        }

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

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

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

        /* layout */
        .container-main {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* header nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(10, 15, 31, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            transition: box-shadow 0.3s ease;
        }

        .site-header::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--accent), transparent);
            opacity: 0.5;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .logo-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--frost);
            white-space: nowrap;
        }

        .logo-brand .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #08101e;
            font-size: 20px;
            font-weight: 900;
            box-shadow: 0 0 16px rgba(56, 225, 255, 0.3);
            flex-shrink: 0;
        }

        .logo-brand:hover .logo-icon {
            box-shadow: 0 0 28px rgba(56, 225, 255, 0.5);
        }

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

        .nav-links li a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 14px;
            letter-spacing: 0.3px;
            color: #aab8d0;
            border-radius: 8px;
            position: relative;
            transition: color 0.25s ease;
        }

        .nav-links li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(56, 225, 255, 0.8);
            transition: width 0.3s ease;
        }

        .nav-links li a:hover {
            color: #fff;
            text-shadow: 0 0 12px rgba(56, 225, 255, 0.4);
        }

        .nav-links li a:hover::after {
            width: 70%;
        }

        .nav-links li a.active {
            color: var(--accent);
            font-weight: 600;
            text-shadow: 0 0 10px rgba(56, 225, 255, 0.5);
        }

        .nav-links li a.active::after {
            width: 70%;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #08101e;
            font-size: 14px;
            font-weight: 700;
            padding: 10px 22px;
            border-radius: 50px;
            border: none;
            cursor: pointer;
            box-shadow: 0 0 18px rgba(56, 225, 255, 0.25);
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .nav-cta:hover {
            box-shadow: 0 0 32px rgba(56, 225, 255, 0.45);
            transform: translateY(-2px);
        }

        .nav-cta:active {
            transform: translateY(0) scale(0.98);
        }

        .hamburger {
            display: none;
            width: 42px;
            height: 42px;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            color: var(--frost);
            font-size: 20px;
            transition: border-color 0.25s;
        }

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

        /* mobile menu */
        .mobile-menu {
            display: none;
            background: rgba(10, 15, 31, 0.98);
            border-top: 1px solid var(--border);
            padding: 12px 24px 20px;
        }

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

        .mobile-menu a {
            display: block;
            padding: 12px 12px;
            font-size: 15px;
            color: #aab8d0;
            border-bottom: 1px solid rgba(138, 155, 181, 0.08);
            transition: background 0.2s;
        }

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

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--accent);
            background: rgba(56, 225, 255, 0.06);
        }

        .mobile-menu .mobile-cta {
            margin-top: 14px;
            display: block;
            text-align: center;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #08101e;
            font-weight: 700;
            padding: 12px 0;
            border-radius: 50px;
        }

        /* hero */
        .hero-section {
            position: relative;
            min-height: 80vh;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            padding: 120px 0 80px;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(10, 15, 31, 0.96) 0%, rgba(10, 15, 31, 0.82) 45%, rgba(10, 15, 31, 0.6) 100%);
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: linear-gradient(0deg, var(--bg) 0%, transparent 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 700px;
        }

        .hero-content .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            background: rgba(56, 225, 255, 0.12);
            border: 1px solid rgba(56, 225, 255, 0.3);
            border-radius: 50px;
            font-size: 13px;
            color: var(--accent);
            letter-spacing: 0.5px;
            margin-bottom: 20px;
        }

        .hero-content h1 {
            font-size: 46px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: 0.5px;
            margin-bottom: 20px;
            color: var(--frost);
            text-shadow: 0 0 30px rgba(56, 225, 255, 0.15);
        }

        .hero-content h1 .highlight {
            color: var(--accent);
            text-shadow: 0 0 20px rgba(56, 225, 255, 0.4);
        }

        .hero-content .hero-sub {
            font-size: 17px;
            color: #aab8d0;
            line-height: 1.8;
            margin-bottom: 36px;
            max-width: 560px;
        }

        .hero-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 50px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #08101e;
            font-size: 15px;
            font-weight: 700;
            padding: 14px 32px;
            border-radius: 50px;
            border: none;
            cursor: pointer;
            box-shadow: 0 0 20px rgba(56, 225, 255, 0.3);
            transition: all 0.3s ease;
        }

        .btn-primary:hover {
            box-shadow: 0 0 36px rgba(56, 225, 255, 0.5);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0) scale(0.98);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--accent);
            font-size: 15px;
            font-weight: 600;
            padding: 14px 30px;
            border-radius: 50px;
            border: 1px solid rgba(56, 225, 255, 0.5);
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .btn-outline:hover {
            background: rgba(56, 225, 255, 0.1);
            border-color: var(--accent);
            box-shadow: 0 0 20px rgba(56, 225, 255, 0.15);
        }

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

        .btn-neon {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(56, 225, 255, 0.06);
            color: var(--accent);
            font-size: 15px;
            font-weight: 700;
            padding: 14px 32px;
            border-radius: 50px;
            border: 1px solid var(--accent);
            box-shadow: inset 0 0 12px rgba(56, 225, 255, 0.15), 0 0 16px rgba(56, 225, 255, 0.15);
            cursor: pointer;
            transition: all 0.3s ease;
            animation: neonPulse 2s ease-in-out infinite;
        }

        .btn-neon:hover {
            box-shadow: inset 0 0 18px rgba(56, 225, 255, 0.25), 0 0 32px rgba(56, 225, 255, 0.35);
            background: rgba(56, 225, 255, 0.12);
        }

        @keyframes neonPulse {
            0%,
            100% {
                box-shadow: inset 0 0 12px rgba(56, 225, 255, 0.15), 0 0 16px rgba(56, 225, 255, 0.15);
            }
            50% {
                box-shadow: inset 0 0 20px rgba(56, 225, 255, 0.25), 0 0 32px rgba(56, 225, 255, 0.3);
            }
        }

        /* hero features */
        .hero-features {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            max-width: 700px;
        }

        .hero-feature {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 14px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border);
            border-radius: 12px;
            font-size: 13px;
            color: #aab8d0;
        }

        .hero-feature i {
            color: var(--accent);
            font-size: 16px;
        }

        /* section common */
        .section {
            padding: 90px 0;
        }

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

        .section-head .section-tag {
            display: inline-block;
            font-size: 12px;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--accent);
            background: rgba(56, 225, 255, 0.1);
            border: 1px solid rgba(56, 225, 255, 0.2);
            padding: 4px 14px;
            border-radius: 50px;
            margin-bottom: 14px;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--frost);
            margin: 0 0 12px;
        }

        .section-head p {
            color: var(--muted);
            font-size: 15px;
            line-height: 1.8;
            margin: 0;
        }

        /* ladder cards */
        .ladder-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .ladder-card {
            position: relative;
            background: linear-gradient(145deg, rgba(21, 27, 52, 0.9), rgba(10, 15, 31, 0.9));
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 24px;
            transition: all 0.35s ease;
        }

        .ladder-card:hover {
            transform: translateY(-6px);
            border-color: rgba(56, 225, 255, 0.35);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3), 0 0 20px rgba(56, 225, 255, 0.08);
        }

        .ladder-card .ladder-num {
            font-size: 44px;
            font-weight: 900;
            color: rgba(56, 225, 255, 0.2);
            line-height: 1;
            margin-bottom: 18px;
            font-family: 'PingFang SC', sans-serif;
        }

        .ladder-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--frost);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .ladder-card h3 i {
            color: var(--accent);
            font-size: 18px;
        }

        .ladder-card ul {
            list-style: none;
            padding: 0;
            margin: 0 0 20px;
        }

        .ladder-card ul li {
            padding: 4px 0;
            font-size: 14px;
            color: #aab8d0;
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }

        .ladder-card ul li::before {
            content: '';
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 6px rgba(56, 225, 255, 0.6);
            margin-top: 10px;
            flex-shrink: 0;
        }

        .ladder-card .ladder-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            transition: gap 0.2s;
        }

        .ladder-card .ladder-link:hover {
            gap: 10px;
            text-shadow: 0 0 8px rgba(56, 225, 255, 0.3);
        }

        /* Top 级最高档 */
        .ladder-card.highest {
            background: linear-gradient(145deg, rgba(21, 27, 52, 0.95), rgba(10, 15, 31, 0.95));
            border-color: rgba(56, 225, 255, 0.4);
            box-shadow: 0 0 30px rgba(56, 225, 255, 0.1);
        }

        .ladder-card.highest .ladder-num {
            color: var(--amber);
            opacity: 0.8;
        }

        .ladder-card.highest .badge-top {
            position: absolute;
            top: 16px;
            right: 16px;
            background: linear-gradient(135deg, var(--amber), #e0a530);
            color: #08101e;
            font-size: 12px;
            font-weight: 700;
            padding: 3px 12px;
            border-radius: 20px;
            letter-spacing: 0.5px;
        }

        /* package compare */
        .package-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            align-items: stretch;
        }

        .package-card {
            position: relative;
            background: rgba(21, 27, 52, 0.75);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 36px 28px;
            transition: all 0.35s ease;
            display: flex;
            flex-direction: column;
        }

        .package-card:hover {
            transform: translateY(-4px);
            border-color: rgba(56, 225, 255, 0.3);
        }

        .package-card.recommended {
            border: 1px solid var(--accent);
            box-shadow: 0 0 35px rgba(56, 225, 255, 0.18), 0 10px 30px rgba(0, 0, 0, 0.3);
            background: linear-gradient(160deg, rgba(21, 27, 52, 0.95), rgba(10, 15, 31, 0.9));
            transform: scale(1.03);
            z-index: 2;
        }

        .package-card.recommended:hover {
            transform: scale(1.03) translateY(-4px);
        }

        .package-card .rec-badge {
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #08101e;
            font-size: 13px;
            font-weight: 800;
            padding: 4px 20px;
            border-radius: 50px;
            box-shadow: 0 0 16px rgba(56, 225, 255, 0.4);
            white-space: nowrap;
        }

        .package-card h3 {
            font-size: 22px;
            font-weight: 800;
            color: var(--frost);
            margin-bottom: 4px;
        }

        .package-card .package-desc {
            font-size: 13px;
            color: var(--muted);
            margin-bottom: 20px;
        }

        .package-card .package-price {
            font-size: 28px;
            font-weight: 800;
            color: var(--accent);
            margin-bottom: 20px;
        }

        .package-card .package-price span {
            font-size: 14px;
            color: var(--muted);
            font-weight: 400;
        }

        .package-card ul {
            list-style: none;
            padding: 0;
            margin: 0 0 26px;
            flex: 1;
        }

        .package-card ul li {
            padding: 6px 0;
            font-size: 14px;
            color: #aab8d0;
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }

        .package-card ul li i {
            color: var(--accent);
            font-size: 13px;
            margin-top: 6px;
        }

        .package-card .package-btn {
            display: block;
            text-align: center;
            padding: 12px 0;
            border-radius: 50px;
            font-weight: 700;
            font-size: 14px;
            border: 1px solid var(--border);
            color: var(--muted);
            transition: all 0.3s ease;
            cursor: pointer;
        }

        .package-card .package-btn:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(56, 225, 255, 0.05);
        }

        .package-card.recommended .package-btn {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #08101e;
            border: none;
            box-shadow: 0 0 18px rgba(56, 225, 255, 0.3);
        }

        .package-card.recommended .package-btn:hover {
            box-shadow: 0 0 30px rgba(56, 225, 255, 0.5);
            transform: translateY(-2px);
        }

        /* limit time */
        .limit-section {
            position: relative;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            padding: 100px 0;
        }

        .limit-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 15, 31, 0.92), rgba(10, 15, 31, 0.85));
        }

        .limit-content {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .limit-content h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--frost);
            margin-bottom: 12px;
        }

        .limit-content h2 .amber-text {
            color: var(--amber);
        }

        .limit-content p {
            font-size: 16px;
            color: #aab8d0;
            max-width: 600px;
            margin: 0 auto 30px;
        }

        .countdown-wrap {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 18px;
            margin-bottom: 32px;
        }

        .countdown-item {
            text-align: center;
            min-width: 70px;
        }

        .countdown-item .num {
            font-size: 42px;
            font-weight: 900;
            color: var(--accent);
            font-family: 'PingFang SC', sans-serif;
            text-shadow: 0 0 24px rgba(56, 225, 255, 0.35);
            line-height: 1;
            font-variant-numeric: tabular-nums;
        }

        .countdown-item .label {
            font-size: 13px;
            color: var(--muted);
            margin-top: 6px;
            letter-spacing: 1px;
        }

        .countdown-sep {
            font-size: 32px;
            color: rgba(56, 225, 255, 0.3);
            font-weight: 300;
            margin-top: -20px;
        }

        /* info list */
        .info-section {
            background: var(--bg);
        }

        .info-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .info-card {
            display: flex;
            gap: 20px;
            background: rgba(21, 27, 52, 0.65);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            transition: all 0.35s ease;
            overflow: hidden;
        }

        .info-card:hover {
            border-color: rgba(56, 225, 255, 0.3);
            box-shadow: 0 0 20px rgba(56, 225, 255, 0.08);
            transform: translateY(-3px);
        }

        .info-card .info-thumb {
            width: 120px;
            height: 88px;
            border-radius: 10px;
            background: linear-gradient(135deg, rgba(56, 225, 255, 0.2), rgba(49, 200, 242, 0.1));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--accent);
            flex-shrink: 0;
            border: 1px solid rgba(56, 225, 255, 0.15);
        }

        .info-card .info-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 10px;
        }

        .info-card .info-body {
            flex: 1;
            min-width: 0;
        }

        .info-card .info-body h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--frost);
            margin: 0 0 8px;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .info-card .info-body h3 a:hover {
            color: var(--accent);
        }

        .info-card .info-body p {
            font-size: 14px;
            color: #8a9bb5;
            line-height: 1.7;
            margin: 0 0 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .info-card .info-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: #6b7d9a;
        }

        .info-card .info-meta .cate-tag {
            display: inline-block;
            padding: 2px 10px;
            border-radius: 4px;
            background: rgba(56, 225, 255, 0.1);
            border: 1px solid rgba(56, 225, 255, 0.2);
            color: var(--accent);
            font-size: 12px;
        }

        .info-empty {
            grid-column: 1 / -1;
            border: 1px dashed rgba(138, 155, 181, 0.3);
            border-radius: var(--radius);
            padding: 50px;
            text-align: center;
            color: var(--muted);
            font-size: 15px;
        }

        .info-empty i {
            font-size: 40px;
            color: rgba(138, 155, 181, 0.4);
            display: block;
            margin-bottom: 12px;
        }

        /* contact form */
        .contact-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 60px;
            align-items: center;
        }

        .contact-form-wrap {
            background: rgba(10, 15, 31, 0.6);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 36px;
        }

        .contact-form-wrap .form-group {
            margin-bottom: 20px;
        }

        .contact-form-wrap label {
            display: block;
            font-size: 13px;
            color: #aab8d0;
            letter-spacing: 0.5px;
            margin-bottom: 6px;
        }

        .contact-form-wrap input,
        .contact-form-wrap select,
        .contact-form-wrap textarea {
            width: 100%;
            padding: 12px 16px;
            background: rgba(10, 15, 31, 0.6);
            border: 1px solid rgba(138, 155, 181, 0.3);
            border-radius: 10px;
            color: var(--frost);
            font-size: 14px;
            outline: none;
            transition: all 0.25s ease;
        }

        .contact-form-wrap input:focus,
        .contact-form-wrap select:focus,
        .contact-form-wrap textarea:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 4px rgba(56, 225, 255, 0.12);
        }

        .contact-form-wrap textarea {
            resize: vertical;
            min-height: 100px;
        }

        .contact-form-wrap select option {
            background: var(--bg);
        }

        .contact-btn {
            width: 100%;
            padding: 14px 0;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            border: none;
            border-radius: 50px;
            color: #08101e;
            font-size: 15px;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-top: 8px;
        }

        .contact-btn:hover {
            box-shadow: 0 0 28px rgba(56, 225, 255, 0.4);
            transform: translateY(-2px);
        }

        .contact-btn:active {
            transform: translateY(0) scale(0.98);
        }

        .contact-info-side {
            padding: 20px 0;
        }

        .contact-info-side h3 {
            font-size: 24px;
            font-weight: 800;
            color: var(--frost);
            margin-bottom: 16px;
        }

        .contact-info-side p {
            font-size: 15px;
            color: #aab8d0;
            line-height: 1.9;
            margin-bottom: 24px;
        }

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

        .contact-item-list li {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 10px 0;
            font-size: 14px;
            color: #aab8d0;
        }

        .contact-item-list li i {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(56, 225, 255, 0.1);
            border: 1px solid rgba(56, 225, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 14px;
            flex-shrink: 0;
        }

        /* FAQ */
        .faq-section {
            background: var(--bg);
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: rgba(21, 27, 52, 0.5);
            border: 1px solid rgba(138, 155, 181, 0.12);
            border-radius: 12px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color 0.3s ease;
        }

        .faq-item:hover {
            border-color: rgba(56, 225, 255, 0.25);
        }

        .faq-item.open {
            border-color: rgba(56, 225, 255, 0.3);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--frost);
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            transition: background 0.3s;
        }

        .faq-question:hover {
            background: rgba(56, 225, 255, 0.04);
        }

        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(56, 225, 255, 0.1);
            border: 1px solid rgba(56, 225, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--accent);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }

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

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-answer p {
            padding: 0 24px 20px;
            font-size: 14px;
            line-height: 1.9;
            color: #8a9bb5;
        }

        /* final CTA */
        .final-cta {
            background: rgba(21, 27, 52, 0.4);
            border-top: 1px solid var(--border);
            padding: 60px 0;
            text-align: center;
        }

        .final-cta h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--frost);
            margin-bottom: 12px;
        }

        .final-cta p {
            color: var(--muted);
            margin-bottom: 24px;
        }

        /* footer */
        .site-footer {
            background: var(--bg-footer);
            padding: 64px 0 0;
            border-top: 1px solid var(--border);
        }

        .site-footer::before {
            content: '';
            display: block;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--accent), transparent);
            max-width: 1280px;
            margin: 0 auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding: 40px 24px 30px;
            max-width: 1280px;
            margin: 0 auto;
        }

        .footer-brand .logo-brand {
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            color: #6b7d9a;
            line-height: 1.8;
            max-width: 280px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--frost);
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }

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

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

        .footer-col ul li a {
            font-size: 14px;
            color: #6b7d9a;
            transition: all 0.2s ease;
            display: inline-block;
            position: relative;
            padding-left: 0;
        }

        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 10px;
        }

        .footer-col ul li a:hover::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 8px rgba(56, 225, 255, 0.6);
        }

        .footer-bottom {
            border-top: 1px solid rgba(138, 155, 181, 0.08);
            padding: 20px 24px;
            text-align: center;
            font-size: 13px;
            color: #55667e;
        }

        /* reveal animation */
        .reveal {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* responsive */
        @media (max-width: 1024px) {
            .ladder-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .package-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 20px;
            }

            .package-card {
                padding: 26px 18px;
            }

            .contact-grid {
                gap: 40px;
                grid-template-columns: 1fr;
            }

            .hero-content h1 {
                font-size: 40px;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 60px 0;
            }

            .header-inner {
                height: 64px;
            }

            .nav-links {
                display: none;
            }

            .nav-cta {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            .hero-section {
                min-height: auto;
                padding: 100px 0 60px;
            }

            .hero-content h1 {
                font-size: 30px;
            }

            .hero-features {
                grid-template-columns: 1fr;
                gap: 8px;
            }

            .hero-btns {
                flex-direction: column;
                width: 100%;
            }

            .hero-btns .btn-primary,
            .hero-btns .btn-outline {
                width: 100%;
                justify-content: center;
            }

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

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

            .package-card.recommended {
                transform: scale(1);
            }

            .package-card.recommended:hover {
                transform: translateY(-4px);
            }

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

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
                padding: 30px 20px 20px;
            }

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

            .logo-brand .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }

            .countdown-item .num {
                font-size: 30px;
            }

            .countdown-wrap {
                gap: 10px;
            }

            .countdown-item {
                min-width: 60px;
            }

            .contact-form-wrap {
                padding: 24px;
            }
        }

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

            .header-inner {
                padding: 0 16px;
            }

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

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

            .simplebar {
                font-size: 14px;
            }

            .limit-content h2 {
                font-size: 28px;
            }

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

            .contact-grid {
                gap: 30px;
            }

            .card-list-item {
                flex-direction: column;
            }

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

/* roulang page: category1 */
:root {
            --bg-dark: #0A0F1F;
            --bg-panel: #151B34;
            --bg-card: #111830;
            --accent: #38E1FF;
            --accent-deep: #31C8F2;
            --frost: #EAF6FF;
            --muted: #8A9BB5;
            --amber: #F5B841;
            --border-soft: rgba(140, 170, 210, 0.14);
            --radius: 16px;
            --shadow-neon: 0 0 24px rgba(56, 225, 255, 0.14);
            --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.35);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-family);
            background: var(--bg-dark);
            color: var(--frost);
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease;
        }

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

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

        .container {
            width: 100%;
            max-width: 1220px;
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ========== Header ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(10, 15, 31, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(56, 225, 255, 0.18);
            box-shadow: 0 1px 24px rgba(56, 225, 255, 0.06);
        }

        .header-inner {
            max-width: 1220px;
            margin: 0 auto;
            padding: 0 28px;
            height: 70px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

        .logo-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 21px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--frost);
            white-space: nowrap;
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 11px;
            background: linear-gradient(135deg, rgba(56, 225, 255, 0.25), rgba(56, 225, 255, 0.06));
            border: 1px solid rgba(56, 225, 255, 0.45);
            color: var(--accent);
            font-size: 20px;
            font-weight: 900;
            box-shadow: 0 0 18px rgba(56, 225, 255, 0.2);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-links li {
            position: relative;
        }

        .nav-links a {
            display: block;
            padding: 10px 16px;
            font-size: 15px;
            font-weight: 500;
            letter-spacing: 0.3px;
            color: var(--muted);
            border-radius: 8px;
            transition: color 0.25s ease, text-shadow 0.25s ease;
        }

        .nav-links a:hover {
            color: var(--frost);
            text-shadow: 0 0 12px rgba(56, 225, 255, 0.5);
        }

        .nav-links a.active {
            color: var(--accent);
            text-shadow: 0 0 14px rgba(56, 225, 255, 0.55);
        }

        .nav-links a.active::after {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--accent), rgba(56, 225, 255, 0.2));
            box-shadow: 0 0 12px rgba(56, 225, 255, 0.6);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 700;
            letter-spacing: 0.3px;
            color: #0A0F1F;
            background: linear-gradient(135deg, #38E1FF, #31C8F2);
            box-shadow: 0 0 20px rgba(56, 225, 255, 0.35);
            transition: transform 0.2s ease, box-shadow 0.25s ease, filter 0.25s ease;
        }

        .nav-cta:hover {
            transform: translateY(-1px);
            filter: brightness(1.08);
            box-shadow: 0 0 28px rgba(56, 225, 255, 0.5);
        }

        .nav-cta:active {
            transform: translateY(1px);
        }

        .hamburger {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            border: 1px solid var(--border-soft);
            color: var(--frost);
            font-size: 18px;
        }

        .mobile-menu {
            display: none;
            background: rgba(10, 15, 31, 0.97);
            border-top: 1px solid rgba(56, 225, 255, 0.15);
            padding: 12px 28px 22px;
        }

        .mobile-menu a {
            display: block;
            padding: 13px 8px;
            font-size: 16px;
            font-weight: 500;
            color: var(--muted);
            border-bottom: 1px solid rgba(140, 170, 210, 0.08);
        }

        .mobile-menu a.active {
            color: var(--accent);
        }

        .mobile-menu a.mobile-cta {
            display: inline-flex;
            margin-top: 14px;
            padding: 11px 26px;
            border-radius: 999px;
            border: none;
            color: #0A0F1F;
            background: linear-gradient(135deg, #38E1FF, #31C8F2);
            font-weight: 700;
        }

        /* ========== Hero Banner ========== */
        .category-hero {
            position: relative;
            padding: 88px 0 64px;
            background: linear-gradient(180deg, rgba(10, 15, 31, 0.78), rgba(10, 15, 31, 0.95)), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            border-bottom: 1px solid rgba(56, 225, 255, 0.2);
        }

        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 20%, rgba(56, 225, 255, 0.12), transparent 60%), radial-gradient(ellipse at 80% 80%, rgba(56, 225, 255, 0.08), transparent 50%);
            pointer-events: none;
        }

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

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--muted);
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }

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

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

        .breadcrumb .current {
            color: var(--accent);
            text-shadow: 0 0 8px rgba(56, 225, 255, 0.4);
        }

        .category-hero h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.25;
            margin: 0 0 14px;
            letter-spacing: 1px;
            background: linear-gradient(135deg, #FFFFFF, #C9EFFF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .category-hero .lead {
            font-size: 16px;
            color: var(--muted);
            max-width: 640px;
            line-height: 1.9;
            margin-bottom: 26px;
        }

        .hero-features {
            display: flex;
            flex-wrap: wrap;
            gap: 28px;
            margin-top: 28px;
            padding-top: 24px;
            border-top: 1px solid rgba(56, 225, 255, 0.15);
        }

        .hero-features span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--frost);
            letter-spacing: 0.3px;
        }

        .hero-features i {
            color: var(--accent);
            font-size: 15px;
        }

        /* ========== Section ========== */
        .section {
            padding: 80px 0;
        }

        .section-alt {
            background: rgba(21, 27, 52, 0.4);
            border-top: 1px solid var(--border-soft);
            border-bottom: 1px solid var(--border-soft);
        }

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

        .section-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 1px;
            text-transform: uppercase;
            color: var(--accent);
            padding: 6px 14px;
            border-radius: 999px;
            border: 1px solid rgba(56, 225, 255, 0.3);
            background: rgba(56, 225, 255, 0.06);
            margin-bottom: 14px;
        }

        .section-title {
            font-size: 30px;
            font-weight: 800;
            line-height: 1.3;
            margin: 0;
            letter-spacing: 0.5px;
        }

        .section-desc {
            font-size: 15px;
            color: var(--muted);
            max-width: 640px;
            margin-top: 10px;
            line-height: 1.8;
        }

        /* ========== Info Grid ========== */
        .info-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            align-items: start;
        }

        .info-main {
            display: grid;
            gap: 28px;
        }

        .info-card {
            background: linear-gradient(145deg, rgba(21, 27, 52, 0.8), rgba(17, 24, 48, 0.9));
            border: 1px solid var(--border-soft);
            border-radius: var(--radius);
            padding: 32px 32px 28px;
            box-shadow: var(--shadow-card);
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .info-card:hover {
            border-color: rgba(56, 225, 255, 0.35);
            box-shadow: var(--shadow-neon);
        }

        .info-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin: 0 0 12px;
            color: var(--frost);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .info-card h3 i {
            color: var(--accent);
            font-size: 18px;
        }

        .info-card p {
            font-size: 15px;
            color: var(--muted);
            margin: 0 0 14px;
            line-height: 1.9;
        }

        .info-card ul {
            margin: 0;
            display: grid;
            gap: 10px;
        }

        .info-card ul li {
            position: relative;
            padding-left: 20px;
            font-size: 14px;
            color: var(--muted);
            line-height: 1.75;
        }

        .info-card ul li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 10px;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 8px rgba(56, 225, 255, 0.6);
        }

        .inline-link {
            color: var(--accent);
            font-weight: 500;
            border-bottom: 1px solid rgba(56, 225, 255, 0.3);
            transition: border-color 0.25s ease;
        }

        .inline-link:hover {
            border-bottom-color: var(--accent);
        }

        .anchor-panel {
            position: sticky;
            top: 100px;
            background: linear-gradient(145deg, rgba(21, 27, 52, 0.85), rgba(17, 24, 48, 0.92));
            border: 1px solid var(--border-soft);
            border-radius: var(--radius);
            padding: 26px 24px;
            box-shadow: var(--shadow-card);
        }

        .anchor-panel h4 {
            font-size: 15px;
            font-weight: 700;
            letter-spacing: 0.5px;
            margin: 0 0 16px;
            color: var(--frost);
        }

        .anchor-panel ul {
            display: grid;
            gap: 4px;
        }

        .anchor-panel ul a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            border-radius: 10px;
            font-size: 14px;
            color: var(--muted);
            border: 1px solid transparent;
            transition: all 0.25s ease;
        }

        .anchor-panel ul a i {
            font-size: 13px;
            color: var(--accent);
            opacity: 0.7;
        }

        .anchor-panel ul a:hover {
            color: var(--frost);
            background: rgba(56, 225, 255, 0.06);
            border-color: rgba(56, 225, 255, 0.2);
        }

        .anchor-panel .anchor-cta {
            margin-top: 20px;
            padding-top: 18px;
            border-top: 1px solid var(--border-soft);
            display: grid;
            gap: 10px;
        }

        .anchor-panel .anchor-cta a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            padding: 11px 16px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            border: 1px solid rgba(56, 225, 255, 0.35);
            color: var(--accent);
            transition: all 0.25s ease;
        }

        .anchor-panel .anchor-cta a:hover {
            background: rgba(56, 225, 255, 0.1);
            box-shadow: 0 0 16px rgba(56, 225, 255, 0.2);
        }

        /* ========== Feature Cards ========== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .feature-card {
            background: linear-gradient(145deg, rgba(21, 27, 52, 0.8), rgba(17, 24, 48, 0.92));
            border: 1px solid var(--border-soft);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .feature-card:hover {
            transform: translateY(-4px);
            border-color: rgba(56, 225, 255, 0.35);
            box-shadow: var(--shadow-neon);
        }

        .feature-card .card-media {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }

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

        .feature-card:hover .card-media img {
            transform: scale(1.04);
        }

        .feature-card .card-media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(10, 15, 31, 0.75));
        }

        .feature-card .card-body {
            padding: 24px 24px 26px;
        }

        .feature-card .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin: 0 0 10px;
            color: var(--frost);
        }

        .feature-card .card-body p {
            font-size: 14px;
            color: var(--muted);
            margin: 0;
            line-height: 1.8;
        }

        .feature-card .card-body .card-tag {
            display: inline-block;
            font-size: 12px;
            color: var(--accent);
            background: rgba(56, 225, 255, 0.08);
            border: 1px solid rgba(56, 225, 255, 0.2);
            border-radius: 6px;
            padding: 3px 10px;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        /* ========== Steps ========== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }

        .step-item {
            position: relative;
            background: linear-gradient(145deg, rgba(21, 27, 52, 0.75), rgba(17, 24, 48, 0.88));
            border: 1px solid var(--border-soft);
            border-radius: var(--radius);
            padding: 30px 24px 26px;
            transition: transform 0.3s ease, border-color 0.3s ease;
        }

        .step-item:hover {
            transform: translateY(-3px);
            border-color: rgba(56, 225, 255, 0.35);
        }

        .step-item::before {
            counter-increment: step;
            content: "0" counter(step);
            font-size: 28px;
            font-weight: 800;
            letter-spacing: 1px;
            color: transparent;
            -webkit-text-stroke: 1px rgba(56, 225, 255, 0.6);
            display: block;
            margin-bottom: 16px;
        }

        .step-item h3 {
            font-size: 17px;
            font-weight: 700;
            margin: 0 0 8px;
            color: var(--frost);
        }

        .step-item p {
            font-size: 14px;
            color: var(--muted);
            margin: 0;
            line-height: 1.8;
        }

        .step-item::after {
            content: "";
            position: absolute;
            top: 50%;
            right: -14px;
            width: 24px;
            height: 1px;
            background: linear-gradient(90deg, rgba(56, 225, 255, 0.5), transparent);
        }

        .step-item:last-child::after {
            display: none;
        }

        /* ========== Notice Block ========== */
        .notice-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 44px;
            align-items: center;
        }

        .notice-block .notice-media {
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border-soft);
            box-shadow: var(--shadow-card);
        }

        .notice-block .notice-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .notice-list {
            display: grid;
            gap: 14px;
        }

        .notice-list li {
            display: flex;
            gap: 14px;
            padding: 16px 18px;
            background: rgba(21, 27, 52, 0.55);
            border: 1px solid var(--border-soft);
            border-radius: 14px;
            transition: border-color 0.25s ease, background 0.25s ease;
        }

        .notice-list li:hover {
            border-color: rgba(56, 225, 255, 0.3);
            background: rgba(21, 27, 52, 0.85);
        }

        .notice-list li i {
            flex-shrink: 0;
            margin-top: 5px;
            color: var(--amber);
            font-size: 16px;
        }

        .notice-list li span {
            font-size: 14px;
            color: var(--frost);
            line-height: 1.7;
        }

        /* ========== FAQ ========== */
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
            display: grid;
            gap: 14px;
        }

        .faq-item {
            background: linear-gradient(145deg, rgba(21, 27, 52, 0.7), rgba(17, 24, 48, 0.85));
            border: 1px solid var(--border-soft);
            border-radius: 14px;
            overflow: hidden;
            transition: border-color 0.3s ease;
        }

        .faq-item.active {
            border-color: rgba(56, 225, 255, 0.35);
        }

        .faq-item .faq-q {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--frost);
            user-select: none;
            transition: background 0.25s ease;
        }

        .faq-item .faq-q:hover {
            background: rgba(56, 225, 255, 0.04);
        }

        .faq-item .faq-q .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            border: 1px solid rgba(56, 225, 255, 0.3);
            color: var(--accent);
            font-size: 13px;
            transition: transform 0.3s ease, background 0.3s ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: rgba(56, 225, 255, 0.1);
        }

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

        .faq-item.active .faq-a {
            max-height: 300px;
        }

        .faq-item .faq-a p {
            padding: 0 24px 22px;
            margin: 0;
            font-size: 14px;
            color: var(--muted);
            line-height: 1.85;
        }

        /* ========== CTA Band ========== */
        .cta-band {
            position: relative;
            padding: 72px 0;
            background: linear-gradient(135deg, rgba(56, 225, 255, 0.1), rgba(21, 27, 52, 0.6)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            border-top: 1px solid rgba(56, 225, 255, 0.2);
            border-bottom: 1px solid var(--border-soft);
        }

        .cta-band::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(10, 15, 31, 0.6);
        }

        .cta-band .container {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }

        .cta-band h2 {
            font-size: 28px;
            font-weight: 800;
            margin: 0 0 8px;
            line-height: 1.3;
        }

        .cta-band p {
            font-size: 15px;
            color: var(--muted);
            margin: 0;
        }

        .cta-btn-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 30px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 700;
            color: #0A0F1F;
            background: linear-gradient(135deg, #38E1FF, #31C8F2);
            box-shadow: 0 0 24px rgba(56, 225, 255, 0.3);
            transition: transform 0.2s ease, box-shadow 0.25s ease, filter 0.25s ease;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            filter: brightness(1.07);
            box-shadow: 0 0 32px rgba(56, 225, 255, 0.5);
        }

        .btn-primary:active {
            transform: translateY(1px);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            color: var(--accent);
            border: 1px solid rgba(56, 225, 255, 0.4);
            background: rgba(56, 225, 255, 0.04);
            transition: all 0.25s ease;
        }

        .btn-outline:hover {
            background: rgba(56, 225, 255, 0.12);
            border-color: var(--accent);
            box-shadow: 0 0 20px rgba(56, 225, 255, 0.2);
        }

        .btn-outline:active {
            transform: translateY(1px);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: #080C18;
            border-top: 1px solid rgba(56, 225, 255, 0.25);
            padding: 64px 0 28px;
            position: relative;
        }

        .site-footer::before {
            content: "";
            position: absolute;
            top: -1px;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, rgba(56, 225, 255, 0.7), rgba(56, 225, 255, 0.08), rgba(56, 225, 255, 0.7));
        }

        .footer-grid {
            max-width: 1220px;
            margin: 0 auto;
            padding: 0 28px;
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 1fr 1fr;
            gap: 40px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.8;
            margin: 18px 0 0;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            letter-spacing: 0.5px;
            color: var(--frost);
            margin: 0 0 16px;
        }

        .footer-col ul {
            display: grid;
            gap: 10px;
        }

        .footer-col ul a,
        .footer-col ul li {
            font-size: 14px;
            color: var(--muted);
            display: inline-flex;
            align-items: center;
            transition: color 0.25s ease, padding-left 0.25s ease;
        }

        .footer-col ul a:hover {
            color: var(--frost);
            padding-left: 4px;
            box-shadow: inset 2px 0 0 0 rgba(56, 225, 255, 0.7);
        }

        .footer-bottom {
            max-width: 1220px;
            margin: 44px auto 0;
            padding: 22px 28px 0;
            border-top: 1px solid rgba(140, 170, 210, 0.1);
            font-size: 13px;
            color: rgba(138, 155, 181, 0.7);
            text-align: center;
            letter-spacing: 0.4px;
        }

        /* ========== Reveal Animation ========== */
        .reveal {
            opacity: 0;
            transform: translateY(22px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ========== Focus states ========== */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 6px;
        }

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

            .anchor-panel {
                position: static;
            }

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

            .step-item::after {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                padding: 0 18px;
            }

            .nav-links,
            .nav-cta {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            .mobile-menu {
                display: none;
            }

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

            .category-hero {
                padding: 64px 0 48px;
            }

            .category-hero h1 {
                font-size: 30px;
            }

            .section {
                padding: 56px 0;
            }

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

            .notice-block {
                grid-template-columns: 1fr;
            }

            .cta-band .container {
                flex-direction: column;
                text-align: center;
            }

            .cta-btn-group {
                justify-content: center;
            }

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

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

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

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

            .hero-features {
                gap: 14px;
                flex-direction: column;
            }

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

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

            .footer-bottom {
                padding: 20px 18px 0;
            }
        }

/* roulang page: article */
:root {
            --bg: #0A0F1F;
            --bg-2: #151B34;
            --bg-3: #1A2340;
            --accent: #38E1FF;
            --accent-2: #31C8F2;
            --text: #EAF6FF;
            --text-2: #8A9BB5;
            --gold: #F5B841;
            --border: rgba(138, 155, 181, 0.15);
            --radius: 16px;
            --glow: 0 0 30px rgba(56, 225, 255, 0.12);
            --header-h: 72px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.8;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease;
        }

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

        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(10, 15, 31, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid transparent;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            border-bottom-color: rgba(56, 225, 255, 0.18);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }

        .header-inner {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
            height: var(--header-h);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .logo-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 19px;
            letter-spacing: 0.3px;
            color: var(--text);
            white-space: nowrap;
        }

        .logo-brand:hover {
            color: #fff;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: linear-gradient(135deg, rgba(56, 225, 255, 0.18), rgba(56, 225, 255, 0.04));
            border: 1px solid rgba(56, 225, 255, 0.5);
            color: var(--accent);
            font-weight: 900;
            font-size: 17px;
            box-shadow: 0 0 14px rgba(56, 225, 255, 0.2);
        }

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

        .nav-links a {
            position: relative;
            display: inline-block;
            padding: 8px 18px;
            color: var(--text-2);
            font-size: 15px;
            font-weight: 500;
            letter-spacing: 0.3px;
            border-radius: 8px;
            transition: color 0.25s ease, text-shadow 0.25s ease;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            left: 50%;
            bottom: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--accent), transparent);
            border-radius: 2px;
            transform: translateX(-50%);
            transition: width 0.3s ease;
        }

        .nav-links a:hover {
            color: #fff;
            text-shadow: 0 0 12px rgba(56, 225, 255, 0.35);
        }

        .nav-links a:hover::after {
            width: 70%;
        }

        .nav-links a.active {
            color: var(--accent);
            text-shadow: 0 0 16px rgba(56, 225, 255, 0.4);
        }

        .nav-links a.active::after {
            width: 70%;
            box-shadow: 0 0 8px rgba(56, 225, 255, 0.6);
        }

        .nav-links a.active::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 6px;
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 8px var(--accent);
            transform: translateY(-50%);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 9px 22px;
            border-radius: 30px;
            background: var(--accent);
            color: #08121f;
            font-size: 14px;
            font-weight: 700;
            letter-spacing: 0.4px;
            box-shadow: 0 0 18px rgba(56, 225, 255, 0.25);
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .nav-cta:hover {
            background: #6eeaff;
            box-shadow: 0 0 26px rgba(56, 225, 255, 0.45);
            transform: translateY(-1px);
            color: #08121f;
        }

        .nav-cta:active {
            transform: translateY(0);
        }

        .hamburger {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 10px;
            color: var(--text);
            font-size: 18px;
            cursor: pointer;
            transition: all 0.25s ease;
        }

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

        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            background: rgba(10, 15, 31, 0.97);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(56, 225, 255, 0.15);
            padding: 16px 24px 20px;
            z-index: 99;
            flex-direction: column;
            gap: 4px;
            transform: translateY(-6px);
            opacity: 0;
            pointer-events: none;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }

        .mobile-menu.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-menu a {
            display: block;
            padding: 12px 14px;
            font-size: 16px;
            color: var(--text-2);
            border-radius: 8px;
            border-left: 2px solid transparent;
            transition: all 0.2s ease;
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--accent);
            border-left-color: var(--accent);
            background: rgba(56, 225, 255, 0.06);
        }

        .mobile-menu .mobile-cta {
            margin-top: 8px;
            text-align: center;
            background: var(--accent);
            color: #08121f;
            border-radius: 30px;
            border-left: none;
            font-weight: 700;
        }

        .mobile-menu .mobile-cta:hover {
            background: #6eeaff;
            color: #08121f;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            padding: 28px 0 0;
            display: flex;
            justify-content: center;
        }

        .breadcrumb-inner {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-2);
            background: rgba(21, 27, 52, 0.6);
            border: 1px solid var(--border);
            border-radius: 30px;
            padding: 6px 18px;
        }

        .breadcrumb-inner a {
            color: var(--text-2);
            transition: color 0.2s;
        }

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

        .breadcrumb-inner .sep {
            color: rgba(138, 155, 181, 0.5);
            font-size: 11px;
        }

        .breadcrumb-inner .current {
            color: var(--accent);
            font-weight: 500;
            max-width: 240px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ===== 文章头部 ===== */
        .article-header {
            max-width: 860px;
            margin: 0 auto;
            padding: 36px 24px 0;
            text-align: center;
        }

        .article-header .category-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 5px 16px;
            border-radius: 30px;
            background: rgba(56, 225, 255, 0.08);
            border: 1px solid rgba(56, 225, 255, 0.35);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 18px;
        }

        .article-header h1 {
            font-size: clamp(28px, 4vw, 44px);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.5px;
            color: var(--text);
            text-shadow: 0 0 40px rgba(56, 225, 255, 0.08);
            margin-bottom: 16px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 18px;
            color: var(--text-2);
            font-size: 13px;
            border-bottom: 1px solid var(--border);
            padding-bottom: 22px;
            margin-top: 10px;
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta i {
            color: var(--accent);
            font-size: 12px;
        }

        /* ===== 文章主体 ===== */
        .article-wrap {
            max-width: 1120px;
            margin: 0 auto;
            padding: 36px 24px 0;
            display: grid;
            grid-template-columns: 1fr;
            gap: 40px;
        }

        @media (min-width: 1024px) {
            .article-wrap {
                grid-template-columns: minmax(0, 1fr) 300px;
            }
        }

        .article-main {
            min-width: 0;
        }

        .article-body {
            background: rgba(21, 27, 52, 0.4);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: clamp(24px, 4vw, 48px);
        }

        .article-body .lead {
            font-size: 18px;
            line-height: 1.85;
            color: rgba(234, 246, 255, 0.9);
            margin-bottom: 24px;
            padding-bottom: 20px;
            border-bottom: 1px solid rgba(138, 155, 181, 0.1);
        }

        .article-content {
            font-size: 15.5px;
            line-height: 1.85;
            color: rgba(234, 246, 255, 0.82);
        }

        .article-content h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
            margin: 36px 0 16px;
            padding-left: 14px;
            border-left: 3px solid var(--accent);
            line-height: 1.4;
        }

        .article-content h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            margin: 28px 0 12px;
            line-height: 1.5;
        }

        .article-content p {
            margin-bottom: 18px;
        }

        .article-content a {
            color: var(--accent);
            border-bottom: 1px solid transparent;
        }

        .article-content a:hover {
            border-bottom-color: var(--accent);
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 18px;
            padding-left: 22px;
        }

        .article-content li {
            margin-bottom: 8px;
            position: relative;
        }

        .article-content ul li::before {
            content: '';
            position: absolute;
            left: -16px;
            top: 12px;
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 6px rgba(56, 225, 255, 0.5);
        }

        .article-content blockquote {
            border-left: 3px solid var(--accent);
            padding: 16px 22px;
            background: rgba(56, 225, 255, 0.06);
            border-radius: 0 14px 14px 0;
            margin: 24px 0;
            color: rgba(234, 246, 255, 0.85);
            font-style: normal;
        }

        .article-content blockquote p {
            margin: 0;
        }

        .article-content img {
            border-radius: 14px;
            margin: 24px 0;
            border: 1px solid var(--border);
        }

        .article-content code {
            background: rgba(56, 225, 255, 0.08);
            color: var(--accent);
            padding: 2px 8px;
            border-radius: 6px;
            font-family: 'SF Mono', 'Consolas', monospace;
            font-size: 14px;
        }

        /* ===== 侧栏 ===== */
        .article-side {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .side-card {
            background: rgba(21, 27, 52, 0.6);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 24px;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .side-card:hover {
            border-color: rgba(56, 225, 255, 0.3);
            box-shadow: var(--glow);
        }

        .side-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
            letter-spacing: 0.4px;
        }

        .side-row {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-2);
            padding: 8px 0;
            border-bottom: 1px solid rgba(138, 155, 181, 0.08);
        }

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

        .side-row i {
            color: var(--accent);
            font-size: 12px;
        }

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

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

        .side-list a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 10px;
            border-radius: 8px;
            color: var(--text-2);
            font-size: 14px;
            transition: all 0.2s ease;
        }

        .side-list a:hover {
            background: rgba(56, 225, 255, 0.06);
            color: var(--accent);
        }

        .side-list a i {
            font-size: 11px;
            color: rgba(56, 225, 255, 0.5);
        }

        .side-cta {
            position: relative;
            overflow: hidden;
            text-align: center;
            padding: 32px 20px;
            background: linear-gradient(145deg, rgba(56, 225, 255, 0.08), transparent 60%), url('/assets/images/backpic/back-2.png') center/cover;
        }

        .side-cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom, rgba(10, 15, 31, 0.4), rgba(10, 15, 31, 0.8));
        }

        .side-cta>* {
            position: relative;
            z-index: 1;
        }

        .side-cta h3 {
            color: #fff;
            background: none;
        }

        .side-cta p {
            font-size: 13px;
            color: rgba(234, 246, 255, 0.7);
            margin-bottom: 16px;
        }

        .side-cta .btn-light {
            display: inline-block;
            padding: 8px 20px;
            border-radius: 30px;
            background: var(--accent);
            color: #08121f;
            font-size: 14px;
            font-weight: 700;
            transition: all 0.3s ease;
        }

        .side-cta .btn-light:hover {
            box-shadow: 0 0 20px rgba(56, 225, 255, 0.4);
            transform: translateY(-1px);
        }

        /* ===== 空状态 ===== */
        .not-found {
            max-width: 760px;
            margin: 60px auto;
            padding: 80px 40px;
            text-align: center;
            background: rgba(21, 27, 52, 0.4);
            border: 1px dashed rgba(56, 225, 255, 0.3);
            border-radius: 20px;
        }

        .not-found .icon {
            width: 72px;
            height: 72px;
            margin: 0 auto 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(56, 225, 255, 0.08);
            border: 1px solid rgba(56, 225, 255, 0.3);
            font-size: 28px;
            color: var(--accent);
        }

        .not-found h2 {
            font-size: 22px;
            color: var(--text);
            margin-bottom: 12px;
        }

        .not-found p {
            color: var(--text-2);
            font-size: 15px;
            max-width: 360px;
            margin: 0 auto 28px;
        }

        .not-found .btn-back {
            display: inline-block;
            padding: 10px 28px;
            border-radius: 30px;
            background: var(--accent);
            color: #08121f;
            font-weight: 700;
            transition: all 0.3s ease;
        }

        .not-found .btn-back:hover {
            box-shadow: 0 0 20px rgba(56, 225, 255, 0.4);
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            max-width: 1120px;
            margin: 0 auto;
            padding: 60px 24px 0;
        }

        .related-section .sec-title {
            font-size: 24px;
            font-weight: 700;
            text-align: center;
            margin-bottom: 30px;
            color: var(--text);
        }

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

        @media (min-width: 768px) {
            .related-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        .related-card {
            background: rgba(21, 27, 52, 0.5);
            border: 1px solid var(--border);
            border-radius: 18px;
            overflow: hidden;
            transition: all 0.3s ease;
            display: block;
        }

        .related-card:hover {
            transform: translateY(-4px);
            border-color: rgba(56, 225, 255, 0.35);
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3), var(--glow);
        }

        .related-card .thumb {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            position: relative;
        }

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

        .related-card:hover .thumb img {
            transform: scale(1.04);
        }

        .related-card .badge {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 3px 12px;
            background: rgba(10, 15, 31, 0.85);
            border: 1px solid rgba(56, 225, 255, 0.4);
            border-radius: 30px;
            font-size: 12px;
            color: var(--accent);
            font-weight: 500;
        }

        .related-card .info {
            padding: 20px 20px 24px;
        }

        .related-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.5;
            margin-bottom: 8px;
            transition: color 0.3s ease;
        }

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

        .related-card p {
            font-size: 13px;
            color: var(--text-2);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ===== CTA 区块 ===== */
        .cta-section {
            position: relative;
            margin: 64px auto 0;
            max-width: 1120px;
            padding: 70px 40px;
            border-radius: 24px;
            overflow: hidden;
            background: url('/assets/images/backpic/back-2.png') center/cover;
            text-align: center;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(10, 15, 31, 0.92), rgba(21, 27, 52, 0.75));
        }

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

        .cta-section h2 {
            font-size: clamp(24px, 4vw, 34px);
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }

        .cta-section p {
            font-size: 15px;
            color: rgba(234, 246, 255, 0.75);
            max-width: 520px;
            margin: 0 auto 28px;
        }

        .countdown {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 14px;
            margin-bottom: 30px;
        }

        .countdown .cd-item {
            background: rgba(10, 15, 31, 0.7);
            border: 1px solid rgba(56, 225, 255, 0.3);
            border-radius: 12px;
            padding: 10px 0;
            min-width: 72px;
            text-align: center;
        }

        .countdown .cd-item .num {
            font-size: 26px;
            font-weight: 800;
            color: var(--accent);
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
        }

        .countdown .cd-item .unit {
            font-size: 11px;
            color: var(--text-2);
            letter-spacing: 1px;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 40px;
            border-radius: 40px;
            background: var(--accent);
            color: #08121f;
            font-size: 16px;
            font-weight: 800;
            letter-spacing: 0.5px;
            box-shadow: 0 0 24px rgba(56, 225, 255, 0.3);
            animation: pulse-glow 2s ease-in-out infinite;
            transition: all 0.3s ease;
        }

        .cta-btn:hover {
            background: #6eeaff;
            box-shadow: 0 0 36px rgba(56, 225, 255, 0.5);
            transform: translateY(-2px);
        }

        .cta-btn:active {
            transform: translateY(0);
        }

        @keyframes pulse-glow {
            0%,
            100% {
                box-shadow: 0 0 18px rgba(56, 225, 255, 0.3);
            }
            50% {
                box-shadow: 0 0 32px rgba(56, 225, 255, 0.5);
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            max-width: 1120px;
            margin: 0 auto;
            padding: 70px 24px 40px;
        }

        .faq-section .sec-title {
            text-align: center;
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .faq-section .sec-sub {
            text-align: center;
            font-size: 14px;
            color: var(--text-2);
            margin-bottom: 36px;
        }

        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: rgba(21, 27, 52, 0.4);
            border: 1px solid var(--border);
            border-radius: 14px;
            overflow: hidden;
            transition: border-color 0.3s ease;
        }

        .faq-item:hover {
            border-color: rgba(56, 225, 255, 0.25);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            cursor: pointer;
            list-style: none;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            transition: background 0.2s ease;
            user-select: none;
        }

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

        .faq-item summary:hover {
            background: rgba(56, 225, 255, 0.04);
        }

        .faq-item summary .icon {
            width: 28px;
            height: 28px;
            min-width: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(56, 225, 255, 0.4);
            color: var(--accent);
            font-size: 14px;
            transition: transform 0.3s ease, background 0.3s ease;
        }

        .faq-item[open] summary .icon {
            transform: rotate(45deg);
            background: rgba(56, 225, 255, 0.15);
        }

        .faq-item .answer {
            padding: 0 22px 18px;
            font-size: 14px;
            color: var(--text-2);
            line-height: 1.8;
            border-top: 1px solid rgba(138, 155, 181, 0.08);
            margin-top: 0;
        }

        .faq-item .answer p {
            margin: 14px 0 0;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #080C18;
            border-top: 1px solid transparent;
            margin-top: 60px;
            position: relative;
        }

        .site-footer::before {
            content: '';
            position: absolute;
            top: -1px;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, var(--accent), transparent 30%, transparent 70%, var(--accent));
            opacity: 0.25;
        }

        .footer-grid {
            max-width: 1240px;
            margin: 0 auto;
            padding: 60px 24px 30px;
            display: grid;
            grid-template-columns: 1fr;
            gap: 36px;
        }

        @media (min-width: 768px) {
            .footer-grid {
                grid-template-columns: 1.4fr 1fr 1fr 1fr;
            }
        }

        .footer-brand .logo-brand {
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-2);
            line-height: 1.8;
            max-width: 280px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
        }

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

        .footer-col a {
            font-size: 14px;
            color: var(--text-2);
            transition: all 0.2s ease;
            position: relative;
            padding-left: 0;
        }

        .footer-col a:hover {
            color: #fff;
            padding-left: 8px;
        }

        .footer-col a:hover::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 6px var(--accent);
            transform: translateY(-50%);
        }

        .footer-col li i {
            color: var(--text-2);
            font-size: 12px;
        }

        .footer-bottom {
            max-width: 1240px;
            margin: 0 auto;
            padding: 20px 24px;
            border-top: 1px solid rgba(138, 155, 181, 0.08);
            text-align: center;
            font-size: 12px;
            color: rgba(138, 155, 181, 0.6);
            letter-spacing: 0.3px;
        }

        .footer-bottom a {
            color: rgba(138, 155, 181, 0.6);
        }

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

        /* ===== Reveal 动画 ===== */
        .reveal {
            opacity: 0;
            transform: translateY(28px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== 按钮 / 标签通用 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 26px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 700;
            letter-spacing: 0.3px;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
        }

        .btn-primary {
            background: var(--accent);
            color: #08121f;
            box-shadow: 0 0 14px rgba(56, 225, 255, 0.2);
        }

        .btn-primary:hover {
            background: #6eeaff;
            box-shadow: 0 0 24px rgba(56, 225, 255, 0.4);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 0 10px rgba(56, 225, 255, 0.3);
        }

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

        .btn-outline:hover {
            background: rgba(56, 225, 255, 0.1);
            border-color: #6eeaff;
            color: #6eeaff;
        }

        .btn-outline:active {
            background: rgba(56, 225, 255, 0.18);
        }

        @media (min-width: 768px) {
            .article-header {
                padding-top: 48px;
            }
            .article-wrap {
                padding-top: 44px;
            }
            .cta-section {
                padding: 80px 60px;
            }
        }

/* roulang page: category2 */
:root {
            --bg: #0A0F1F;
            --bg2: #0D1226;
            --panel: #151B34;
            --accent: #38E1FF;
            --accent2: #31C8F2;
            --frost: #EAF6FF;
            --mist: #8A9BB5;
            --amber: #F5B841;
            --border: rgba(234, 246, 255, .1);
            --radius: 16px;
            --shadow-glow: 0 0 24px rgba(56, 225, 255, .15);
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background: var(--bg);
            color: var(--frost);
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            line-height: 1.8;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .25s ease;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
        }
        .container-custom {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 28px;
        }
        /* ---- header ---- */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(10, 15, 31, .88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(56, 225, 255, .2);
            box-shadow: 0 2px 12px rgba(0, 0, 0, .35);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 28px;
        }
        .logo-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            letter-spacing: 1px;
            font-size: 18px;
            color: var(--frost);
            white-space: nowrap;
        }
        .logo-brand:hover {
            text-shadow: 0 0 18px rgba(56, 225, 255, .4);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, #38E1FF, #1e90c8);
            color: #08111f;
            border-radius: 10px;
            font-weight: 900;
            font-size: 18px;
            box-shadow: 0 0 14px rgba(56, 225, 255, .4);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
            margin: 0;
        }
        .nav-links li a {
            color: var(--mist);
            font-size: 15px;
            letter-spacing: .3px;
            position: relative;
            padding: 8px 2px;
        }
        .nav-links li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, #38E1FF, #31C8F2);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(56, 225, 255, .6);
            transition: width .3s ease;
        }
        .nav-links li a:hover {
            color: #fff;
            text-shadow: 0 0 10px rgba(56, 225, 255, .3);
        }
        .nav-links li a:hover::after,
        .nav-links li a.active::after {
            width: 100%;
        }
        .nav-links li a.active {
            color: var(--accent);
            text-shadow: 0 0 12px rgba(56, 225, 255, .5);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: linear-gradient(135deg, #38E1FF, #1e9fd3);
            color: #08111f;
            font-weight: 700;
            font-size: 14px;
            padding: 9px 20px;
            border-radius: 10px;
            box-shadow: 0 0 16px rgba(56, 225, 255, .35);
            transition: all .25s ease;
            white-space: nowrap;
        }
        .nav-cta:hover {
            filter: brightness(1.15);
            box-shadow: 0 0 24px rgba(56, 225, 255, .55);
            transform: translateY(-1px);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: var(--frost);
            font-size: 24px;
            cursor: pointer;
            padding: 8px;
        }
        .mobile-menu {
            display: none;
            flex-direction: column;
            background: rgba(13, 18, 38, .96);
            border-top: 1px solid rgba(56, 225, 255, .15);
            padding: 12px 28px 24px;
            position: absolute;
            top: 72px;
            left: 0;
            right: 0;
            z-index: 49;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu a {
            color: var(--mist);
            font-size: 16px;
            padding: 14px 0;
            border-bottom: 1px solid rgba(234, 246, 255, .06);
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--accent);
            text-shadow: 0 0 10px rgba(56, 225, 255, .3);
        }
        .mobile-menu .mobile-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            background: linear-gradient(135deg, #38E1FF, #1e9fd3);
            color: #08111f;
            font-weight: 700;
            border-radius: 10px;
            margin-top: 14px;
            padding: 12px;
            border: none;
        }
        /* ---- hero section ---- */
        .category-hero {
            position: relative;
            padding: 88px 0 64px;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(10, 15, 31, .92) 30%, rgba(10, 15, 31, .65) 70%, rgba(21, 27, 52, .4));
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(56, 225, 255, .7), transparent);
        }
        .category-hero .hero-content {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(56, 225, 255, .12);
            border: 1px solid rgba(56, 225, 255, .4);
            color: var(--accent);
            font-size: 13px;
            letter-spacing: 1px;
            padding: 6px 14px;
            border-radius: 999px;
            margin-bottom: 24px;
        }
        .hero-badge .dot {
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
            box-shadow: 0 0 8px rgba(56, 225, 255, .8);
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: .5;
                transform: scale(.8);
            }
        }
        .category-hero h1 {
            font-size: 46px;
            font-weight: 800;
            line-height: 1.25;
            color: #fff;
            margin-bottom: 16px;
        }
        .category-hero h1 .highlight {
            color: var(--accent);
            text-shadow: 0 0 20px rgba(56, 225, 255, .5);
        }
        .category-hero .hero-desc {
            font-size: 16px;
            color: var(--mist);
            max-width: 660px;
            line-height: 1.9;
            margin-bottom: 28px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }
        /* ---- buttons ---- */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 700;
            font-size: 15px;
            padding: 13px 30px;
            border-radius: 12px;
            transition: all .25s ease;
            border: 1px solid transparent;
            cursor: pointer;
        }
        .btn-primary {
            background: linear-gradient(135deg, #38E1FF, #1e9fd3);
            color: #08111f;
            box-shadow: 0 0 20px rgba(56, 225, 255, .35);
        }
        .btn-primary:hover {
            filter: brightness(1.15);
            box-shadow: 0 0 32px rgba(56, 225, 255, .55);
            transform: translateY(-2px);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            border-color: rgba(56, 225, 255, .6);
            color: var(--accent);
        }
        .btn-outline:hover {
            background: rgba(56, 225, 255, .1);
            border-color: var(--accent);
            box-shadow: 0 0 16px rgba(56, 225, 255, .2);
        }
        .btn-amber {
            background: linear-gradient(135deg, #F5B841, #e69a1a);
            color: #1a1205;
            box-shadow: 0 0 16px rgba(245, 184, 65, .3);
        }
        .btn-amber:hover {
            filter: brightness(1.1);
            box-shadow: 0 0 28px rgba(245, 184, 65, .5);
            transform: translateY(-2px);
        }
        /* ---- section spacing ---- */
        .section-block {
            padding: 72px 0;
        }
        .section-block.alt {
            background: var(--bg2);
        }
        .section-title-wrap {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }
        .section-title-wrap .tag {
            display: inline-block;
            font-size: 13px;
            letter-spacing: 2px;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: 8px;
        }
        .section-title-wrap h2 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.3;
            color: #fff;
            margin-bottom: 12px;
        }
        .section-title-wrap p {
            color: var(--mist);
            font-size: 15px;
        }
        /* ---- activity cards ---- */
        .activity-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .activity-card {
            background: linear-gradient(160deg, rgba(21, 27, 52, .85), rgba(13, 18, 38, .9));
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all .3s ease;
            display: flex;
            flex-direction: column;
        }
        .activity-card:hover {
            transform: translateY(-4px);
            border-color: rgba(56, 225, 255, .4);
            box-shadow: var(--shadow-glow);
        }
        .activity-card .card-img {
            height: 180px;
            background-size: cover;
            background-position: center;
            position: relative;
            overflow: hidden;
        }
        .activity-card .card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(10, 15, 31, .8));
        }
        .activity-card .card-badge {
            position: absolute;
            top: 14px;
            right: 14px;
            background: rgba(245, 184, 65, .9);
            color: #1a1205;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 999px;
            z-index: 2;
        }
        .activity-card .card-body {
            padding: 22px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .activity-card .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .activity-card .card-body p {
            font-size: 14px;
            color: var(--mist);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent);
            font-size: 14px;
            font-weight: 600;
            transition: gap .2s ease;
        }
        .card-link:hover {
            gap: 10px;
            text-shadow: 0 0 10px rgba(56, 225, 255, .4);
        }
        /* ---- steps ---- */
        .steps-wrap {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            counter-reset: step;
        }
        .step-item {
            position: relative;
            background: rgba(21, 27, 52, .6);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 30px 24px;
            transition: all .3s ease;
        }
        .step-item:hover {
            border-color: rgba(56, 225, 255, .3);
            box-shadow: 0 0 20px rgba(56, 225, 255, .08);
        }
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(56, 225, 255, .2), rgba(56, 225, 255, .05));
            border: 1px solid rgba(56, 225, 255, .4);
            color: var(--accent);
            font-size: 20px;
            font-weight: 800;
            margin-bottom: 18px;
            font-variant-numeric: tabular-nums;
        }
        .step-item h3 {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--mist);
            line-height: 1.7;
        }
        .step-arrow {
            position: absolute;
            top: 50%;
            right: -18px;
            transform: translateY(-50%);
            color: rgba(56, 225, 255, .5);
            font-size: 18px;
            z-index: 3;
        }
        /* ---- notes ---- */
        .notes-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: start;
        }
        .notes-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .notes-list li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            background: rgba(21, 27, 52, .5);
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 18px 20px;
            font-size: 15px;
            color: #c7d8ee;
            line-height: 1.7;
            transition: all .25s ease;
        }
        .notes-list li:hover {
            border-color: rgba(56, 225, 255, .25);
            background: rgba(21, 27, 52, .8);
        }
        .notes-list li i {
            color: var(--amber);
            font-size: 16px;
            margin-top: 3px;
            flex-shrink: 0;
        }
        .notes-side {
            background: linear-gradient(160deg, #151B34, #0D1226);
            border: 1px solid rgba(56, 225, 255, .25);
            border-radius: 20px;
            padding: 36px 32px;
            position: relative;
            overflow: hidden;
        }
        .notes-side::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 180px;
            height: 180px;
            background: rgba(56, 225, 255, .08);
            border-radius: 50%;
            filter: blur(40px);
        }
        .notes-side h3 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }
        .notes-side p {
            color: var(--mist);
            font-size: 15px;
            line-height: 1.9;
            margin-bottom: 20px;
        }
        .notes-side .contact-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .notes-side .contact-list a {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: var(--accent);
            font-size: 15px;
        }
        .notes-side .contact-list a:hover {
            text-shadow: 0 0 10px rgba(56, 225, 255, .4);
        }
        /* ---- faq ---- */
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: rgba(21, 27, 52, .6);
            border: 1px solid var(--border);
            border-radius: 14px;
            overflow: hidden;
            transition: border-color .25s ease;
        }
        .faq-item.active {
            border-color: rgba(56, 225, 255, .4);
        }
        .faq-que {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            transition: background .25s ease;
        }
        .faq-que:hover {
            background: rgba(56, 225, 255, .05);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            border: 1px solid rgba(56, 225, 255, .5);
            color: var(--accent);
            font-size: 16px;
            font-weight: 400;
            transition: transform .3s ease, background .25s ease;
        }
        .faq-item.active .faq-icon {
            transform: rotate(225deg);
            background: rgba(56, 225, 255, .15);
        }
        .faq-ans {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }
        .faq-ans-inner {
            padding: 0 24px 22px;
            color: var(--mist);
            font-size: 15px;
            line-height: 1.8;
        }
        /* ---- CTA ---- */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, rgba(21, 27, 52, .9), rgba(10, 15, 31, .9)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(56, 225, 255, .6), transparent);
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: 34px;
            font-weight: 800;
            color: #fff;
            line-height: 1.35;
            margin-bottom: 14px;
        }
        .cta-inner p {
            color: var(--mist);
            font-size: 16px;
            margin-bottom: 28px;
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 16px;
        }
        /* ---- footer ---- */
        .site-footer {
            background: #080C18;
            border-top: 1px solid rgba(56, 225, 255, .20);
            padding: 64px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 28px 40px;
        }
        .footer-brand .logo-brand {
            margin-bottom: 14px;
        }
        .footer-brand p {
            color: var(--mist);
            font-size: 14px;
            line-height: 1.8;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            letter-spacing: .5px;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul li a {
            color: var(--mist);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            transition: all .25s ease;
        }
        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 6px;
            text-shadow: 0 0 10px rgba(56, 225, 255, .3);
        }
        .footer-bottom {
            border-top: 1px solid rgba(234, 246, 255, .06);
            padding: 20px 28px;
            text-align: center;
            color: rgba(138, 155, 181, .7);
            font-size: 13px;
            max-width: 1240px;
            margin: 0 auto;
        }
        /* ---- reveal ---- */
        .reveal {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity .6s ease, transform .6s ease;
        }
        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }
        /* ---- responsive ---- */
        @media (max-width: 1024px) {
            .activity-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-wrap {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .step-arrow {
                display: none;
            }
            .notes-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                height: 64px;
            }
            .nav-links,
            .nav-cta {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .category-hero {
                padding: 60px 0 48px;
            }
            .category-hero h1 {
                font-size: 30px;
            }
            .section-block {
                padding: 52px 0;
            }
            .section-title-wrap h2 {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 520px) {
            .container-custom {
                padding: 0 18px;
            }
            .header-inner {
                padding: 0 18px;
            }
            .activity-grid,
            .steps-wrap {
                grid-template-columns: 1fr;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .category-hero h1 {
                font-size: 26px;
            }
        }
        @media (prefers-reduced-motion: reduce) {
            html {
                scroll-behavior: auto;
            }
            .reveal {
                opacity: 1;
                transform: none;
                transition: none;
            }
        }