/* roulang page: index */
:root {
            --primary: #E83E8F;
            --primary-light: #FF5C9F;
            --secondary: #7C5CFC;
            --accent: #FF7A45;
            --bg: #131318;
            --bg-2: #1E1E26;
            --bg-3: #2A2A35;
            --text: #F5F5F7;
            --text-2: #A6A6B5;
            --border: rgba(255, 255, 255, 0.06);
            --border-hover: rgba(232, 62, 143, 0.4);
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 6px 24px rgba(0, 0, 0, 0.2);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.32);
            --container: 1200px;
            --space: 96px;
            --space-sm: 64px;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            font-size: 16px;
            line-height: 1.7;
            background: var(--bg);
            color: var(--text);
            -webkit-font-smoothing: antialiased;
        }
        img { max-width: 100%; display: block; }
        a { color: inherit; text-decoration: none; }
        button { font-family: inherit; cursor: pointer; border: none; background: none; }
        input, select, textarea { font-family: inherit; font-size: 14px; color: var(--text); }
        ul, ol { list-style: none; }
        .container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
        .section { padding: var(--space) 0; position: relative; }
        .section-sm { padding: var(--space-sm) 0; }
        .section-title { font-size: clamp(26px, 3.5vw, 34px); font-weight: 700; line-height: 1.3; letter-spacing: -0.02em; }
        .section-desc { font-size: 14px; color: var(--text-2); margin-top: 8px; max-width: 720px; line-height: 1.6; }
        .section-head { margin-bottom: 48px; display: flex; flex-direction: column; gap: 8px; }
        .section-head.center { align-items: center; text-align: center; }
        .section-head.center .section-desc { margin-left: auto; margin-right: auto; }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1.2;
            transition: all 0.3s ease;
            white-space: nowrap;
            border: 1px solid transparent;
        }
        .btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; }
        .btn:active { transform: scale(0.98); }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            box-shadow: 0 4px 20px rgba(232, 62, 143, 0.35);
        }
        .btn-primary:hover { box-shadow: 0 6px 28px rgba(232, 62, 143, 0.5); transform: translateY(-2px); }
        .btn-accent {
            background: linear-gradient(135deg, var(--accent), #FF5F5F);
            color: #fff;
            box-shadow: 0 4px 20px rgba(255, 122, 69, 0.3);
        }
        .btn-accent:hover { box-shadow: 0 6px 28px rgba(255, 122, 69, 0.45); transform: translateY(-2px); }
        .btn-outline {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.3);
            color: var(--text);
        }
        .btn-outline:hover { border-color: var(--primary); color: var(--primary-light); }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            height: 64px;
            background: rgba(19, 19, 24, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }
        .site-header.scrolled { background: rgba(19, 19, 24, 0.95); box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4); }
        .nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
        .logo { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 700; letter-spacing: -0.02em; }
        .logo:hover { color: var(--primary-light); }
        .logo svg { width: 28px; height: 28px; border-radius: 8px; }
        .main-nav { display: flex; gap: 24px; align-items: center; }
        .main-nav a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-2);
            padding: 6px 2px;
            position: relative;
            transition: color 0.3s;
        }
        .main-nav a:hover { color: var(--text); }
        .main-nav a.active { color: var(--primary-light); }
        .main-nav a.active::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-right { display: flex; align-items: center; gap: 12px; }
        .lang-switch { display: flex; border-radius: 999px; border: 1px solid rgba(255, 255, 255, 0.2); overflow: hidden; }
        .lang-switch button {
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-2);
            transition: all 0.3s;
        }
        .lang-switch button.active { background: var(--primary); color: #fff; }
        .lang-switch button:focus-visible { outline: 2px solid var(--primary); outline-offset: -2px; }
        .lang-switch button:hover:not(.active) { color: var(--text); }
        .nav-cta { display: inline-flex; }
        .hamburger { display: none; flex-direction: column; gap: 5px; padding: 8px; }
        .hamburger span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: all 0.3s; }
        .hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: var(--bg-2);
            border-bottom: 1px solid var(--border);
            padding: 16px 24px 24px;
            z-index: 99;
            transform: translateY(-16px);
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }
        .mobile-menu.open { transform: translateY(0); opacity: 1; visibility: visible; }
        .mobile-menu a { display: block; padding: 12px 0; font-size: 16px; font-weight: 500; color: var(--text); border-bottom: 1px solid var(--border); }
        .mobile-menu a:last-child { border-bottom: none; }
        .mobile-menu a.active { color: var(--primary-light); }
        .mobile-menu .btn { margin-top: 16px; width: 100%; }

        /* Hero */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-1.jpg') center center / cover no-repeat;
            padding: 160px 0 80px;
        }
        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(19, 19, 24, 0.95) 30%, rgba(19, 19, 24, 0.65) 65%, rgba(19, 19, 24, 0.35) 100%);
        }
        .hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 40%, rgba(232, 62, 143, 0.08) 0%, transparent 60%);
        }
        .hero-content { position: relative; z-index: 2; max-width: 760px; }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            padding: 6px 18px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text);
            margin-bottom: 24px;
        }
        .hero-badge .dot { width: 8px; height: 8px; background: #4ADE80; border-radius: 50%; animation: pulse 2s infinite; }
        @keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }
        .hero h1 {
            font-size: clamp(34px, 5vw, 56px);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
        }
        .hero h1 .highlight { color: var(--primary-light); }
        .hero-desc { font-size: 16px; line-height: 1.65; color: rgba(245, 245, 247, 0.8); max-width: 560px; margin-bottom: 28px; }
        .hero-cta { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 40px; }
        .hero-icons { display: grid; grid-template-columns: repeat(4, auto); gap: 16px; }
        .hero-icon-item { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-2); padding: 8px 16px; border-radius: 999px; background: rgba(255, 255, 255, 0.06); border: 1px solid rgba(255, 255, 255, 0.08); backdrop-filter: blur(8px); }
        .hero-icon-item svg { width: 16px; height: 16px; stroke: var(--primary-light); fill: none; stroke-width: 2; }
        .hero-status {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            margin-top: 32px;
            padding: 10px 20px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.07);
            border: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 13px;
            color: var(--text-2);
        }
        .hero-status .status-item { display: flex; align-items: center; gap: 6px; }
        .hero-status .status-item svg { width: 14px; height: 14px; stroke: #4ADE80; fill: none; stroke-width: 2; }
        .hero-status .sep { width: 1px; height: 14px; background: rgba(255, 255, 255, 0.15); }

        /* Stats */
        .stats { position: relative; background: var(--bg-2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; padding: 56px 0; }
        .stat-card { text-align: center; padding: 24px 16px; border-radius: var(--radius); background: rgba(255, 255, 255, 0.02); border: 1px solid var(--border); transition: border-color 0.3s; }
        .stat-card:hover { border-color: var(--border-hover); }
        .stat-card svg { width: 32px; height: 32px; stroke: var(--primary); fill: none; stroke-width: 1.8; margin-bottom: 12px; }
        .stat-num {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.2;
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .stat-label { font-size: 14px; color: var(--text-2); margin-top: 6px; }
        .stat-note { font-size: 12px; color: var(--text-2); opacity: 0.7; margin-top: 4px; }

        /* Service Matrix */
        .services { position: relative; }
        .services-bg { position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.jpg') center center / cover no-repeat; opacity: 0.06; }
        .services-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
        .service-card {
            position: relative;
            padding: 32px;
            border-radius: var(--radius);
            background: var(--bg-2);
            border: 1px solid var(--border);
            transition: border-color 0.3s, box-shadow 0.3s;
            overflow: hidden;
        }
        .service-card:hover { border-color: var(--border-hover); box-shadow: var(--shadow-lg); }
        .service-card:hover .service-icon { transform: translateY(-4px) rotate(-3deg); }
        .service-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(232, 62, 143, 0.12);
            margin-bottom: 20px;
            transition: transform 0.3s ease;
        }
        .service-icon svg { width: 24px; height: 24px; stroke: var(--primary-light); fill: none; stroke-width: 1.8; }
        .service-card h3 { font-size: 19px; font-weight: 600; margin-bottom: 10px; }
        .service-card p { font-size: 14px; color: var(--text-2); line-height: 1.65; margin-bottom: 16px; }
        .service-link { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 500; color: var(--primary-light); transition: gap 0.3s; }
        .service-link:hover { gap: 10px; }
        .service-link svg { width: 14px; height: 14px; stroke: currentColor; fill: none; stroke-width: 2; }
        .service-wide {
            grid-column: span 2;
            background: linear-gradient(135deg, rgba(232, 62, 143, 0.08), rgba(124, 92, 252, 0.06)), var(--bg-2);
        }
        .service-wide .news-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 32px; margin-top: 16px; }
        .service-wide .news-list a { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--text-2); padding: 8px 0; border-bottom: 1px solid rgba(255, 255, 255, 0.03); transition: color 0.3s, padding-left 0.3s; }
        .service-wide .news-list a:hover { color: var(--text); padding-left: 6px; }
        .service-wide .news-list a::before { content: ""; width: 4px; height: 4px; border-radius: 50%; background: var(--primary); flex-shrink: 0; }

        /* Compare */
        .compare { background: var(--bg-2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
        .compare-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-top: 48px; }
        .compare-card { border-radius: var(--radius); padding: 32px; background: var(--bg-3); border: 1px solid var(--border); opacity: 0.85; }
        .compare-card.recommended { background: linear-gradient(135deg, rgba(232, 62, 143, 0.06), rgba(124, 92, 252, 0.04)), var(--bg-2); border: 1px solid rgba(232, 62, 143, 0.5); box-shadow: 0 0 40px rgba(232, 62, 143, 0.08); opacity: 1; position: relative; }
        .compare-badge {
            position: absolute;
            top: -12px;
            right: 24px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 16px;
            border-radius: 999px;
            box-shadow: 0 4px 12px rgba(232, 62, 143, 0.3);
        }
        .compare-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 4px; }
        .compare-sub { font-size: 14px; color: var(--text-2); margin-bottom: 24px; }
        .compare-list { display: flex; flex-direction: column; gap: 14px; }
        .compare-item { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 0; border-bottom: 1px solid rgba(255, 255, 255, 0.04); }
        .compare-item:last-child { border-bottom: none; }
        .compare-item .label { font-size: 14px; color: var(--text-2); }
        .compare-item .val { display: flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 500; }
        .compare-item .val svg { width: 16px; height: 16px; }
        .compare-item .val.ok svg { stroke: #4ADE80; fill: none; stroke-width: 2.5; }
        .compare-item .val.no svg { stroke: #F87171; fill: none; stroke-width: 2.5; }
        .compare-item .val.bad { color: var(--text-2); }
        .compare-item .val.good { color: var(--text); }

        /* FAQ */
        .faq { position: relative; }
        .faq-wrap { max-width: 800px; margin: 0 auto; }
        .faq-item { border-bottom: 1px solid var(--border); }
        .faq-item:first-child { border-top: 1px solid var(--border); }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 24px 0;
            font-size: 16px;
            font-weight: 500;
            color: var(--text);
            text-align: left;
            transition: color 0.3s;
        }
        .faq-question:hover { color: var(--primary-light); }
        .faq-question:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
        .faq-icon { width: 24px; height: 24px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; border-radius: 50%; border: 1px solid rgba(255, 255, 255, 0.2); transition: transform 0.3s, background 0.3s; }
        .faq-icon svg { width: 12px; height: 12px; stroke: var(--text-2); fill: none; stroke-width: 2; }
        .faq-item.active .faq-icon { transform: rotate(45deg); background: rgba(232, 62, 143, 0.15); border-color: var(--primary); }
        .faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
        .faq-answer p { padding: 0 0 24px; font-size: 15px; color: var(--text-2); line-height: 1.7; max-width: 92%; }

        /* Form */
        .form-section { position: relative; }
        .form-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-5.jpg') center center / cover no-repeat;
            opacity: 0.12;
        }
        .form-wrap {
            position: relative;
            max-width: 640px;
            margin: 0 auto;
            background: linear-gradient(135deg, rgba(232, 62, 143, 0.08), rgba(124, 92, 252, 0.06)), var(--bg-2);
            border: 1px solid var(--border);
            border-radius: 24px;
            padding: 48px;
            box-shadow: var(--shadow-lg);
        }
        .form-wrap h2 { font-size: 28px; font-weight: 700; text-align: center; margin-bottom: 8px; }
        .form-wrap .form-desc { text-align: center; color: var(--text-2); font-size: 14px; margin-bottom: 32px; }
        .form-group { margin-bottom: 20px; }
        .form-group label { display: block; font-size: 14px; font-weight: 500; margin-bottom: 6px; }
        .form-group .required { color: #F87171; margin-left: 2px; }
        .form-group input, .form-group select, .form-group textarea {
            width: 100%;
            padding: 12px 16px;
            background: rgba(19, 19, 24, 0.6);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-sm);
            color: var(--text);
            transition: border-color 0.3s, box-shadow 0.3s;
        }
        .form-group input:focus, .form-group select:focus, .form-group textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(232, 62, 143, 0.15);
        }
        .form-group input::placeholder, .form-group textarea::placeholder { color: rgba(166, 166, 181, 0.6); }
        .form-group select {
            appearance: none;
            -webkit-appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23A6A6B5' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 16px center;
        }
        .form-group textarea { resize: vertical; min-height: 90px; }
        .form-submit { margin-top: 8px; }
        .form-submit .btn { width: 100%; padding: 14px 24px; font-size: 15px; }
        .form-privacy { font-size: 12px; color: var(--text-2); text-align: center; margin-top: 12px; opacity: 0.7; }

        /* Footer */
        .site-footer {
            background: var(--bg-2);
            border-top: 1px solid var(--border);
            padding: 64px 0 24px;
        }
        .footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
        .footer-brand .logo { margin-bottom: 16px; }
        .footer-brand p { font-size: 13px; color: var(--text-2); max-width: 260px; line-height: 1.6; }
        .footer-col h4 { font-size: 14px; font-weight: 600; margin-bottom: 16px; color: var(--text); }
        .footer-col a { display: block; font-size: 13px; color: var(--text-2); padding: 6px 0; transition: color 0.3s; }
        .footer-col a:hover { color: var(--primary-light); }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            font-size: 12px;
            color: var(--text-2);
        }
        .footer-icp { letter-spacing: 0.02em; }

        /* Back to top */
        .back-top {
            display: none;
            position: fixed;
            right: 24px;
            bottom: 24px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--bg-3);
            border: 1px solid rgba(255, 255, 255, 0.12);
            align-items: center;
            justify-content: center;
            z-index: 90;
            transition: all 0.3s;
        }
        .back-top:hover { background: var(--primary); border-color: var(--primary); }
        .back-top:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; }
        .back-top svg { width: 18px; height: 18px; stroke: var(--text); fill: none; stroke-width: 2; }
        .back-top.show { display: flex; }

        /* Responsive */
        @media (max-width: 1024px) {
            .main-nav { gap: 16px; }
            .main-nav a { font-size: 13px; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
        }
        @media (max-width: 767px) {
            .section { padding: var(--space-sm) 0; }
            .main-nav, .nav-right .lang-switch, .nav-right .btn { display: none; }
            .hamburger { display: flex; }
            .mobile-menu { display: block; }
            .hero { padding: 120px 0 64px; min-height: auto; }
            .hero h1 { font-size: 32px; line-height: 1.25; }
            .hero-desc { font-size: 15px; }
            .hero-icons { grid-template-columns: repeat(2, 1fr); }
            .hero-status { flex-wrap: wrap; gap: 8px; }
            .hero-status .sep { display: none; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
            .stats-grid .stat-card { padding: 20px 12px; }
            .stat-num { font-size: 32px; }
            .services-grid { grid-template-columns: 1fr; }
            .service-wide { grid-column: span 1; }
            .service-wide .news-list { grid-template-columns: 1fr; }
            .compare-grid { grid-template-columns: 1fr; gap: 24px; }
            .compare-card { padding: 24px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .form-wrap { padding: 32px 24px; }
            .form-group input, .form-group select, .form-group textarea { padding: 11px 14px; }
        }
        @media (max-width: 480px) {
            .container { padding: 0 16px; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .hero-icons { grid-template-columns: 1fr 1fr; }
            .hero-icon-item { padding: 6px 12px; font-size: 12px; }
            .hero-cta .btn { width: 100%; }
        }

/* roulang page: category1 */
:root {
  --primary: #E83E8F;
  --primary-light: #FF5C9F;
  --secondary: #7C5CFC;
  --accent: #FF7A45;
  --bg: #131318;
  --bg-2: #1E1E26;
  --bg-3: #2A2A35;
  --text: #F5F5F7;
  --text-2: #A6A6B5;
  --border: rgba(255,255,255,0.06);
  --border-hover: rgba(232,62,143,0.4);
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 6px 24px rgba(0,0,0,0.2);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.32);
  --container: 1200px;
  --space: 96px;
  --space-sm: 64px;
}
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .3s; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select, textarea { font-family: inherit; font-size: 14px; color: var(--text); }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: var(--space) 0; position: relative; }
.section-sm { padding: var(--space-sm) 0; }
.section-title { font-size: clamp(26px, 3.5vw, 34px); font-weight: 700; line-height: 1.3; letter-spacing: -0.02em; }
.section-desc { font-size: 14px; color: var(--text-2); margin-top: 8px; max-width: 720px; line-height: 1.6; }
.section-head { margin-bottom: 48px; display: flex; flex-direction: column; gap: 8px; }
.section-head.center { align-items: center; text-align: center; }
.section-head.center .section-desc { margin-left: auto; margin-right: auto; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 32px; border-radius: 999px; font-size: 15px; font-weight: 600;
  line-height: 1.2; transition: all .3s ease; white-space: nowrap; border: 1px solid transparent;
}
.btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; }
.btn:active { transform: scale(0.98); }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--secondary)); color: #fff; box-shadow: 0 4px 20px rgba(232,62,143,0.35); }
.btn-primary:hover { box-shadow: 0 6px 28px rgba(232,62,143,0.5); transform: translateY(-2px); }
.btn-accent { background: linear-gradient(135deg, var(--accent), #FF5F5F); color: #fff; box-shadow: 0 4px 20px rgba(255,122,69,0.3); }
.btn-accent:hover { box-shadow: 0 6px 28px rgba(255,122,69,0.45); transform: translateY(-2px); }
.btn-outline { background: transparent; border-color: rgba(255,255,255,0.3); color: var(--text); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary-light); }
.btn-sm { padding: 9px 22px; font-size: 14px; }
.btn-lg { padding: 16px 44px; font-size: 17px; }

/* Header */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100; height: 64px;
  background: rgba(19,19,24,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background .3s, box-shadow .3s;
}
.site-header.scrolled { background: rgba(19,19,24,0.95); box-shadow: 0 4px 20px rgba(0,0,0,0.4); }
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 700; letter-spacing: -0.02em; color: var(--text); }
.logo:hover { color: var(--primary-light); }
.logo svg { width: 28px; height: 28px; border-radius: 8px; flex-shrink: 0; }
.main-nav { display: flex; gap: 24px; align-items: center; }
.main-nav a { font-size: 14px; font-weight: 500; color: var(--text-2); padding: 6px 2px; position: relative; transition: color .3s; }
.main-nav a:hover { color: var(--text); }
.main-nav a.active { color: var(--primary-light); }
.main-nav a.active::after { content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: 2px; background: var(--primary); border-radius: 2px; }
.nav-right { display: flex; align-items: center; gap: 12px; }
.lang-switch { display: flex; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; }
.lang-switch button { padding: 6px 16px; font-size: 13px; font-weight: 600; color: var(--text-2); transition: all .3s; }
.lang-switch button.active { background: var(--primary); color: #fff; }
.lang-switch button:focus-visible { outline: 2px solid var(--primary); outline-offset: -2px; }
.lang-switch button:hover:not(.active) { color: var(--text); }
.hamburger { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: all .3s; }
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.mobile-menu {
  display: none; position: fixed; top: 64px; left: 0; right: 0;
  background: var(--bg-2); border-bottom: 1px solid var(--border);
  padding: 16px 24px 24px; z-index: 99;
  transform: translateY(-16px); opacity: 0; visibility: hidden;
  transition: all .3s ease;
}
.mobile-menu.open { transform: translateY(0); opacity: 1; visibility: visible; }
.mobile-menu a { display: block; padding: 12px 0; font-size: 16px; font-weight: 500; color: var(--text-2); border-bottom: 1px solid var(--border); }
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a:hover, .mobile-menu a.active { color: var(--primary-light); }

/* ===== Category Hero ===== */
.cat-hero {
  position: relative;
  padding: 180px 0 100px;
  background: linear-gradient(90deg, rgba(19,19,24,0.92) 0%, rgba(19,19,24,0.75) 50%, rgba(19,19,24,0.4) 100%), url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
  border-bottom: 1px solid var(--border);
}
.cat-hero-content { position: relative; z-index: 2; max-width: 780px; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-2); margin-bottom: 20px; }
.breadcrumb a { color: var(--primary-light); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--text-2); opacity: .5; }
.cat-hero h1 {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.cat-hero h1 span { color: var(--primary-light); }
.cat-hero .lead { font-size: 16px; color: var(--text-2); line-height: 1.7; max-width: 620px; margin-bottom: 24px; }
.cat-meta { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 32px; }
.cat-meta span {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; color: var(--text-2);
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 14px;
}
.cat-meta svg { width: 14px; height: 14px; stroke: var(--primary-light); }
.cat-hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

/* ===== Filter & List ===== */
.list-section { padding: var(--space) 0; }
.filter-bar {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 12px;
  margin-bottom: 40px;
  scrollbar-width: none;
}
.filter-bar::-webkit-scrollbar { display: none; }
.filter-pill {
  flex-shrink: 0;
  padding: 8px 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-2);
  background: var(--bg-2);
  border: 1px solid var(--border);
  transition: all .3s;
}
.filter-pill:hover { color: var(--text); border-color: var(--border-hover); }
.filter-pill.active { background: var(--primary); color: #fff; border-color: var(--primary); box-shadow: 0 4px 16px rgba(232,62,143,0.3); }

.content-list { display: flex; flex-direction: column; gap: 24px; }
.content-card {
  display: flex;
  flex-direction: row;
  gap: 24px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  transition: all .3s ease;
  overflow: hidden;
}
.content-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}
.card-thumb {
  flex-shrink: 0;
  width: 240px;
  height: 160px;
  border-radius: 12px;
  overflow: hidden;
  position: relative;
}
.card-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.content-card:hover .card-thumb img { transform: scale(1.03); }
.card-body { flex: 1; display: flex; flex-direction: column; justify-content: center; min-width: 0; }
.card-body h3 { font-size: 19px; font-weight: 600; margin-bottom: 8px; line-height: 1.4; }
.card-body h3 a { color: var(--text); }
.card-body h3 a:hover { color: var(--primary-light); }
.card-body p { font-size: 14px; color: var(--text-2); line-height: 1.6; margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-footer { display: flex; align-items: center; justify-content: space-between; margin-top: auto; flex-wrap: wrap; gap: 8px; }
.card-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.card-tag {
  font-size: 12px;
  font-weight: 500;
  color: var(--primary-light);
  background: rgba(232,62,143,0.12);
  border-radius: 999px;
  padding: 4px 12px;
}
.card-date { font-size: 12px; color: var(--text-2); }

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 48px;
  flex-wrap: wrap;
}
.page-num, .page-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  height: 42px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-2);
  background: var(--bg-2);
  border: 1px solid var(--border);
  transition: all .3s;
}
.page-num:hover, .page-arrow:hover { color: var(--text); border-color: var(--border-hover); }
.page-num.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.page-arrow:disabled { opacity: .4; cursor: not-allowed; }
.page-arrow svg { width: 16px; height: 16px; }

/* ===== Feature Grid ===== */
.feature-section { background: var(--bg-2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.feature-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: all .3s;
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: opacity .3s;
}
.feature-card:hover { border-color: var(--border-hover); transform: translateY(-2px); box-shadow: var(--shadow); }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: rgba(232,62,143,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.feature-icon svg { width: 24px; height: 24px; stroke: var(--primary-light); fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.feature-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-2); line-height: 1.6; }
.feature-wide {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: linear-gradient(135deg, rgba(232,62,143,0.12), rgba(124,92,252,0.1));
  border: 1px solid var(--border-hover);
  border-radius: var(--radius);
  padding: 28px 32px;
  flex-wrap: wrap;
}
.feature-wide h3 { font-size: 20px; font-weight: 700; margin-bottom: 6px; }
.feature-wide p { font-size: 14px; color: var(--text-2); }
.feature-wide .btn { flex-shrink: 0; }

/* ===== Steps ===== */
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.step-item {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  position: relative;
  transition: all .3s;
}
.step-item:hover { border-color: var(--border-hover); transform: translateY(-2px); box-shadow: var(--shadow); }
.step-num {
  font-size: 42px;
  font-weight: 800;
  line-height: 1;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
  display: block;
}
.step-item h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.step-item p { font-size: 14px; color: var(--text-2); line-height: 1.6; }

/* ===== FAQ ===== */
.faq-section { background: var(--bg-2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--border);
  transition: background .3s;
}
.faq-item:first-child { border-top: 1px solid var(--border); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 4px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  width: 100%;
  transition: color .3s;
}
.faq-question:hover { color: var(--primary-light); }
.faq-question:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; border-radius: 6px; }
.faq-icon {
  flex-shrink: 0;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--bg-3);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .3s;
}
.faq-icon::before {
  content: "+";
  font-size: 18px;
  font-weight: 400;
  color: var(--text-2);
  line-height: 1;
  transition: transform .3s;
}
.faq-item.active .faq-icon { background: var(--primary); }
.faq-item.active .faq-icon::before { content: ""; background: #fff; width: 10px; height: 2px; border-radius: 2px; }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease, padding .4s ease;
  padding: 0 4px;
}
.faq-answer-inner { padding-bottom: 24px; font-size: 14px; color: var(--text-2); line-height: 1.7; }
.faq-item.active .faq-answer { max-height: 300px; }

/* ===== CTA Banner ===== */
.cta-banner {
  padding: var(--space-sm) 0;
  background: linear-gradient(135deg, rgba(232,62,143,0.15), rgba(124,92,252,0.12)), var(--bg);
  border-bottom: 1px solid var(--border);
}
.cta-inner {
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
  padding: 16px;
}
.cta-inner h2 { font-size: clamp(26px, 4vw, 38px); font-weight: 800; line-height: 1.25; margin-bottom: 12px; }
.cta-inner p { font-size: 15px; color: var(--text-2); margin-bottom: 32px; }
.cta-inner .btn-lg { min-width: 220px; }

/* ===== Footer ===== */
.site-footer {
  background: #101015;
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p { font-size: 14px; color: var(--text-2); line-height: 1.7; max-width: 300px; }
.footer-col h4 { font-size: 14px; font-weight: 600; margin-bottom: 16px; color: var(--text); }
.footer-col a {
  display: block;
  font-size: 13px;
  color: var(--text-2);
  padding: 6px 0;
  transition: color .3s, padding-left .3s;
}
.footer-col a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
  color: var(--text-2);
}
.footer-icp { opacity: .7; }

/* ===== Back to Top ===== */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(232,62,143,0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all .3s;
  z-index: 90;
}
.back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--primary-light); transform: translateY(-2px); }
.back-to-top:focus-visible { outline: 2px solid var(--text); outline-offset: 3px; }
.back-to-top svg { width: 18px; height: 18px; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .main-nav { gap: 16px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 769px) {
  .hamburger, .mobile-menu { display: none !important; }
}

@media (max-width: 768px) {
  .main-nav { display: none; }
  .nav-right .btn-nav { display: none; }
  .hamburger { display: flex; }
  .mobile-menu { display: block; }

  .cat-hero { padding: 140px 0 64px; }
  .cat-hero h1 { font-size: 32px; }
  .cat-hero .lead { font-size: 15px; }
  .cat-hero-actions { flex-direction: column; align-items: stretch; }
  .cat-hero-actions .btn { width: 100%; }

  .content-card { flex-direction: column; padding: 12px; gap: 16px; }
  .card-thumb { width: 100%; height: auto; aspect-ratio: 16/9; }

  .feature-grid { grid-template-columns: 1fr; gap: 16px; }
  .feature-wide { flex-direction: column; text-align: center; padding: 24px 20px; }

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

  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .section { padding: var(--space-sm) 0; }
  .filter-bar { margin-bottom: 24px; }
  .pagination { gap: 6px; }
  .page-num, .page-arrow { min-width: 36px; height: 36px; font-size: 13px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .btn { padding: 10px 24px; font-size: 14px; }
  .btn-lg { padding: 14px 36px; font-size: 16px; }
  .card-body h3 { font-size: 17px; }
  .lang-switch button { padding: 5px 12px; font-size: 12px; }
  .cat-meta { gap: 8px; }
  .cat-meta span { font-size: 12px; padding: 4px 10px; }
}