/* roulang page: index */
/* ========== 设计变量 ========== */
    :root {
        --brand-primary: #FF4D4D;
        --brand-primary-dark: #E63E3E;
        --brand-secondary: #2B6DE8;
        --brand-accent: #FFC940;
        --bg-light: #F5F7FA;
        --bg-white: #FFFFFF;
        --bg-dark: #1E2129;
        --bg-code: #F0F2F5;
        --text-main: #1E2129;
        --text-secondary: #5B6675;
        --text-weak: #8A94A0;
        --border-color: #E8ECF0;
        --radius-lg: 16px;
        --radius-md: 12px;
        --radius-sm: 6px;
        --shadow-sm: 0 2px 8px rgba(30,33,41,0.08);
        --shadow-md: 0 4px 20px rgba(30,33,41,0.08);
        --shadow-lg: 0 12px 48px rgba(30,33,41,0.12);
        --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
        --space-section: 100px;
        --container-max: 1240px;
    }
    
    /* ========== reset / base ========== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
    body {
        font-family: "Inter",system-ui,-apple-system,"Segoe UI","PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
        background-color: var(--bg-white);
        color: var(--text-main);
        line-height: 1.75;
        font-size: 16px;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { text-decoration: none; color: inherit; transition: color 0.2s; }
    ul, ol { list-style: none; }
    .container { max-width: var(--container-max); }
    
    /* ========== nav header ========== */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 1045;
        background: rgba(255,255,255,0.88);
        backdrop-filter: blur(18px);
        border-bottom: 1px solid var(--border-color);
    }
    .navbar { padding: 0; min-height: 66px; }
    .navbar-brand {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 19px;
        font-weight: 700;
        letter-spacing: -0.3px;
        color: var(--text-main) !important;
    }
    .navbar-brand .brand-mark {
        width: 34px;height: 34px;
        background: var(--brand-primary);
        border-radius: 10px;
        display: flex;align-items: center;justify-content: center;
        color:#fff;font-weight:800;font-size:18px;
        box-shadow: 0 4px 12px rgba(255,77,77,0.35);
    }
    .nav-link {
        font-weight:500;
        color: var(--text-secondary) !important;
        font-size: 14.5px;
        padding: 22px 15px !important;
        position: relative;
        white-space: nowrap;
    }
    .nav-link:hover, .nav-link.active { color: var(--text-main) !important; }
    .nav-link.active::after {
        content:""; position:absolute; bottom:-1px; left:12px; right:12px; height:3px;
        background: var(--brand-primary);
        border-radius: 3px 3px 0 0;
    }
    .nav-right { display: flex; align-items: center; gap: 10px; }
    .btn-search {
        border:1px solid var(--border-color);
        background: var(--bg-light);
        border-radius: 30px;
        height: 36px;
        width: 36px;
        display:flex; align-items:center; justify-content:center;
        color:var(--text-secondary);
        transition: all 0.3s;
    }
    .btn-search:hover { background: var(--bg-code); color: var(--brand-primary); border-color: transparent; box-shadow: var(--shadow-sm);}
    .btn-login {
        background: transparent;
        border: 1px solid var(--border-color);
        height: 36px;
        padding: 0 18px;
        border-radius: 30px;
        font-weight:600;
        font-size: 14px;
        color: var(--text-main);
        transition: all 0.3s;
    }
    .btn-login:hover { border-color: var(--text-main); transform: translateY(-1px);}
    .btn-primary-custom {
        background: var(--brand-primary);
        border-color: var(--brand-primary);
        color: #fff;
        height: 36px;
        padding: 0 20px;
        border-radius: 30px;
        font-weight: 600;
        font-size: 14px;
        letter-spacing: 0.2px;
        display: inline-flex;align-items: center;gap:6px;
        transition: all 0.3s;
        box-shadow: 0 4px 15px rgba(255,77,77,0.3);
        border: 1px solid var(--brand-primary);
    }
    .btn-primary-custom:hover {
        background: var(--brand-primary-dark);
        box-shadow: 0 8px 25px rgba(255,77,77,0.4);
        transform: translateY(-2px);
        color:#fff;
    }
    
    /* ========== hero ========== */
    .hero {
        position: relative;
        overflow: hidden;
        min-height: 600px;
        display:flex;
        align-items: center;
        background: linear-gradient(135deg, #ffffff 0%, #fdf2f2 45%, #f7faff 100%);
    }
    .hero-bg {
        position: absolute;
        inset: 0;
        background-image: url('/assets/images/backpic/back-1.png');
        background-size: cover;
        background-position: center;
        opacity: 0.12;
    }
    .hero-content { position: relative; z-index: 2; padding-top: 70px; padding-bottom: 70px; }
    .badge-hero {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: rgba(255,255,255,0.85);
        backdrop-filter: blur(6px);
        border: 1px solid rgba(255,77,77,0.2);
        color: var(--brand-primary-dark);
        font-size: 13px;
        font-weight:600;
        padding: 6px 16px;
        border-radius: 30px;
        box-shadow: var(--shadow-sm);
    }
    .hero h1 {
        font-size: 48px;
        font-weight: 800;
        line-height: 1.2;
        letter-spacing: -1.5px;
        margin: 22px 0 18px;
    }
    .hero h1 .highlight { color: var(--brand-primary); }
    .hero-sub {
        font-size: 18px;
        color: var(--text-secondary);
        max-width: 580px;
        margin-bottom: 30px;
        line-height: 1.7;
    }
    .hero-meta {
        display: flex;
        flex-wrap: wrap;
        gap: 12px;
        margin-top: 28px;
    }
    .hero-stats {
        display: flex;
        gap: 32px;
        margin-top: 48px;
    }
    .stat-item .num { font-size: 28px; font-weight: 800; color: var(--text-main); }
    .stat-item .label{	color: var(--text-weak); font-size: 13px; }
    
    .hero-card-visual {
        position: relative;
    }
    .hero-visual-box {
        background: white;
        border-radius: 20px;
        box-shadow: var(--shadow-lg);
        padding: 32px;
        border: 1px solid rgba(255,255,255,0.8);
        transform: rotate(1.5deg);
    }
    .browser-dots { display:flex; gap:8px; margin-bottom:20px; }
    .browser-dots span { width:12px;height:12px;border-radius:50%;display:block; }
    .dot-r { background:#FF5F57;} .dot-y {background:#FEBD2E;} .dot-g {background:#28C840;}
    
    .platform-tabs { display:flex; flex-wrap:wrap; gap:8px; margin: 16px 0; }
    .platform-tabs .badge {
        background: var(--bg-code);
        color: var(--text-main);
        padding: 6px 14px;
        border-radius: 30px;
        font-weight: 500;
        transition: all 0.2s;
        font-size: 13px;
        border:1px solid transparent;
    }
    .platform-tabs .badge.active { background: var(--brand-primary); color:#fff; }
    
    /* section generic */
    .section { padding: var(--space-section) 0; }
    .section-alt { background: var(--bg-light); }
    .section-dark { background: var(--bg-dark); }
    .section-title {
        font-size: 34px;
        font-weight: 800;
        letter-spacing: -0.5px;
        line-height: 1.3;
        margin-bottom: 14px;
    }
    .section-sub {
        font-size: 16px;
        color: var(--text-secondary);
        max-width: 620px;
    }
    .section-head { margin-bottom: 56px; }
    
    /* cards */
    .card-modern {
        background: #fff;
        border:1px solid var(--border-color);
        border-radius: var(--radius-lg);
        overflow: hidden;
        transition: transform 0.3s, box-shadow 0.3s;
        height: 100%;
    }
    .card-modern:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-md);
    }
    .card-body { padding: 26px; }
    .card-icon {
        width: 48px;height:48px;border-radius: 14px;
        display:flex;align-items:center;justify-content:center;
        font-size: 22px;
        margin-bottom: 18px;
    }
    .icon-el { background: rgba(255,77,77,0.12); color: var(--brand-primary); }
    .icon-bu { background: rgba(43,109,232,0.12); color: var(--brand-secondary); }
    .icon-gr { background: rgba(34,196,130,0.12); color: #22C482; }
    
    .card-modern h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
    .card-modern p, .card-modern .text-body { color: var(--text-secondary); font-size: 14px; line-height: 1.7; }
    
    /* steps / process */
    .step-item {
        position: relative;
        padding: 24px;
        background: #fff;
        border-radius: var(--radius-md);
        border: 1px solid var(--border-color);
        transition: all 0.3s;
    }
    .step-item:hover { box-shadow: var(--shadow-md); }
    .step-num {
        width: 36px; height: 36px;
        border-radius: 50%;
        background: var(--brand-primary);
        color: #fff;
        display: flex;align-items:center;justify-content:center;
        font-weight: 700;
        margin-bottom: 16px;
    }
    
    /* tags / badges */
    .tag {
        display: inline-block;
        padding: 4px 10px;
        background: var(--bg-code);
        color: var(--text-secondary);
        border-radius: 6px;
        font-size: 12px;
        font-weight: 600;
        margin: 2px;
    }
    
    /* table-ish */
    .data-compare {
        background: #fff;
        border-radius: var(--radius-md);
        border: 1px solid var(--border-color);
        overflow-x:auto;
    }
    .data-compare table { margin: 0; font-size: 14px; }
    .data-compare th { background: var(--bg-code); font-weight: 600; border-bottom: 1px solid var(--border-color); }
    
    /* FAQ */
    .faq-item {
        background: #fff;
        border:1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: 8px 0;
    }
    .faq-q {
        font-weight:600;
        padding: 18px 24px;
        display:flex;
        justify-content:space-between;
        align-items:center;
        cursor:pointer;
        border-bottom: 1px solid var(--border-color);
        font-size: 16px;
    }
    .faq-a { padding: 18px 24px; color: var(--text-secondary); line-height: 1.8; font-size: 14px; }
    
    /* footer */
    .site-footer {
        background: var(--bg-dark);
        color: #B8C0CC;
        padding: 50px 0 30px;
        font-size: 14px;
    }
    .site-footer .foot-brand { color:#fff; font-size: 20px; font-weight: 700;}
    .site-footer a { color:#B8C0CC; }
    .site-footer a:hover { color:#fff; }
    .foot-links li { margin: 8px 0; }
    
    /* cms block */
    .cms-list-item {
        display: flex;
        gap: 16px;
        align-items: center;
        padding: 14px 0;
        border-bottom: 1px solid var(--border-color);
    }
    .cms-list-item:last-child { border-bottom: none; }
    .cms-item-date { font-size: 13px; color: var(--text-weak); flex-shrink:0; }
    .cms-item-title { font-weight:600; font-size: 15px; }
    
    /* list mini */
    .mini-list li {
        display: flex;
        gap: 10px;
        align-items: baseline;
        padding: 8px 0;
        border-bottom: 1px dashed var(--border-color);
        font-size: 14px;
    }
    .mini-list li:last-child { border: none; }
    
    /* cta */
    .cta-block {
        background: linear-gradient(120deg, var(--brand-primary), #FF8F5E);
        border-radius: 24px;
        padding: 56px 60px;
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        justify-content: space-between;
        color: #fff;
    }
    .cta-block .btn-light-custom {
        background: #fff; color: var(--brand-primary-dark);
        font-weight: 700;
        border-radius: 40px;
        padding: 12px 32px;
        border: none;
        transition: all 0.3s;
    }
    .cta-block .btn-light-custom:hover { transform: translateY(-2px); box-shadow: 0 12px 24px rgba(0,0,0,0.2);}
    
    /* responsive */
    @media (max-width: 992px) {
        :root { --space-section: 70px; }
        .navbar-collapse {
            background: rgba(255,255,255,0.98);
            border-radius: var(--radius-md);
            padding:20px;
            box-shadow: var(--shadow-md);
            margin-top: 8px;
            border: 1px solid var(--border-color);
        }
        .nav-link { display: inline-block; padding: 8px 0 !important; }
        .nav-link.active::after { display: none; }
        .nav-right { display:none; }
        .hero-content h1 { font-size: 34px; }
        .hero-stats { gap: 20px; }
        .section-title { font-size: 28px; }
        .cta-block { padding: 34px; text-align:center; justify-content:center; gap:20px; }
    }
    @media (max-width: 768px) {
        :root { --space-section: 54px; }
        .hero { text-align:center; }
        .hero-meta, .hero-stats,.hero-sub { max-width:100%; margin-left:auto; margin-right:auto; }
        .badge-hero { margin: 0 auto; }
        .hero-stats { justify-content:center; flex-wrap:wrap; }
        .hero-visual-box { margin-top: 40px; }
        .stat-item .num {font-size: 22px;}
    }
    .btn-check:focus + .btn, .btn:focus, .form-control:focus, .form-check-input:focus { outline: 3px solid rgba(255,77,77,0.25); box-shadow:none; }
    .section-title .bar { display:inline-block; width: 18px; height: 18px; background: var(--brand-primary); border-radius:4px; margin-right:8px;}

/* roulang page: category1 */
:root {
            --brand-primary: #4F6BED;
            --brand-primary-dark: #3A4FD6;
            --brand-accent: #7B5CF0;
            --brand-bg-light: #F5F7FF;
            --brand-bg-neutral: #FAFBFC;
            --brand-text: #1A1D29;
            --brand-text-soft: #5E6472;
            --brand-border: #E3E8F0;
            --brand-radius-lg: 20px;
            --brand-radius-md: 14px;
            --brand-radius-sm: 8px;
            --brand-shadow: 0 16px 44px -10px rgba(31, 45, 92, 0.08);
            --brand-shadow-hover: 0 24px 60px -12px rgba(79, 107, 237, 0.18);
            --brand-transition: 0.3s ease;
        }
        *, *::before, *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "Inter", "SF Pro Text", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
            background-color: #fff;
            color: var(--brand-text);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        body.nav-scrolled .site-header {
            box-shadow: 0 5px 18px rgba(26, 29, 41, 0.06);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
        }
        a {
            text-decoration: none;
            transition: color 0.2s;
        }
        img {
            max-width: 100%;
            height: auto;
        }
        button, input {
            font-family: inherit;
        }
        .container-custom {
            width: 100%;
            max-width: 1260px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        @media (min-width: 992px) {
            .container-custom {
                padding-left: 36px;
                padding-right: 36px;
            }
        }
        section {
            position: relative;
        }
        .section-padding {
            padding: 100px 0;
        }
        @media (max-width: 992px) {
            .section-padding {
                padding: 70px 0;
            }
        }
        .section-heading {
            max-width: 720px;
            margin-bottom: 48px;
        }
        .section-heading h2 {
            font-size: clamp(1.8rem, 4vw, 2.6rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.3;
            color: var(--brand-text);
            margin-bottom: 14px;
        }
        .section-heading p {
            font-size: 1.08rem;
            color: var(--brand-text-soft);
            margin-bottom: 0;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: #fff;
            border-bottom: 1px solid rgba(227, 232, 240, 0.8);
            transition: all 0.3s ease;
        }
        .site-header .container-custom {
            position: relative;
        }
        .site-header .navbar {
            padding-top: 16px;
            padding-bottom: 16px;
            gap: 6px;
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.18rem;
            letter-spacing: -0.01em;
            color: var(--brand-text);
            padding: 0;
            margin-right: 20px;
            transition: opacity 0.2s;
        }
        .navbar-brand:hover {
            opacity: 0.85;
            color: var(--brand-text);
        }
        .brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-accent) 100%);
            border-radius: 10px;
            color: #fff;
            font-weight: 800;
            font-size: 1.15rem;
            box-shadow: 0 6px 14px rgba(79, 107, 237, 0.3);
        }
        .navbar .nav-link {
            font-weight: 500;
            font-size: 0.94rem;
            color: var(--brand-text-soft);
            padding: 8px 14px !important;
            border-radius: 50px;
            transition: all 0.25s;
            position: relative;
        }
        .navbar .nav-link:hover {
            color: var(--brand-primary);
            background: rgba(79, 107, 237, 0.06);
        }
        .navbar .nav-link.active {
            color: var(--brand-primary);
            font-weight: 600;
            background: rgba(79, 107, 237, 0.1);
        }
        .navbar .nav-link.active::after {
            content: "";
            display: block;
            width: 18px;
            height: 3px;
            border-radius: 4px;
            background: var(--brand-primary);
            margin: 4px auto 0;
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-left: auto;
        }
        .btn-search {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--brand-border);
            background: transparent;
            color: var(--brand-text-soft);
            transition: 0.25s ease;
            font-size: 0.9rem;
        }
        .btn-search:hover {
            background: var(--brand-bg-light);
            border-color: var(--brand-primary);
            color: var(--brand-primary);
        }
        .btn-login {
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--brand-text);
            padding: 8px 16px;
            background: var(--brand-bg-neutral);
            border: 1px solid var(--brand-border);
            border-radius: 50px;
            transition: 0.25s ease;
        }
        .btn-login:hover {
            border-color: var(--brand-primary);
            color: var(--brand-primary);
        }
        .btn-primary-custom {
            background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-accent) 100%);
            color: #fff !important;
            border: none;
            padding: 10px 22px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 6px 20px rgba(79, 107, 237, 0.28);
            transition: all 0.3s ease;
        }
        .btn-primary-custom:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 26px rgba(79, 107, 237, 0.38);
            color: #fff;
        }
        .navbar-toggler {
            outline: none;
        }
        .navbar-toggler i {
            color: var(--brand-text);
            font-size: 1.2rem;
        }
        @media (max-width: 991.98px) {
            .site-header .navbar {
                padding-top: 12px;
                padding-bottom: 12px;
            }
            .collapse.navbar-collapse {
                background: #fff;
                padding: 14px 8px 16px;
                border-radius: 16px;
                border: 1px solid var(--brand-border);
                box-shadow: var(--brand-shadow);
                margin-top: 12px;
                width: 100%;
            }
            .navbar .nav-link {
                display: block;
                padding: 10px 14px !important;
                text-align: left;
                border-radius: 10px;
            }
            .navbar .nav-link.active::after {
                display: none;
            }
            .navbar .nav-link.active {
                background: var(--brand-bg-light);
            }
            .nav-right {
                display: none;
            }
        }
        @media (max-width: 576px) {
            .navbar-brand span:last-child {
                font-size: 1rem;
            }
            .brand-mark {
                width: 32px;
                height: 32px;
                font-size: 1rem;
                border-radius: 8px;
            }
        }
        /* HERO */
        .page-hero {
            padding: 80px 0 60px;
            background-color: var(--brand-bg-light);
            background-image: linear-gradient(140deg, rgba(245, 247, 255, 0.9), rgba(255, 255, 255, 0.3));
        }
        @media (max-width: 768px) {
            .page-hero {
                padding: 56px 0 44px;
            }
        }
        .page-hero .hero-pattern {
            position: absolute;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            inset: 0;
            z-index: 0;
        }
        .page-hero .container-custom {
            position: relative;
            z-index: 2;
        }
        .page-hero .section-heading {
            max-width: 820px;
            margin-bottom: 0;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(79, 107, 237, 0.12);
            color: var(--brand-primary-dark);
            font-size: 0.88rem;
            font-weight: 600;
            padding: 7px 18px;
            border-radius: 50px;
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
        }
        .page-hero h1 {
            font-size: clamp(2.2rem, 5vw, 3.6rem);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.025em;
            color: var(--brand-text);
            margin-bottom: 20px;
        }
        .page-hero h1 span {
            background: linear-gradient(135deg, var(--brand-primary), var(--brand-accent));
            background-clip: text;
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            font-weight: 800;
        }
        .page-hero p.lead {
            font-size: 1.2rem;
            line-height: 1.8;
            color: var(--brand-text-soft);
            max-width: 640px;
        }
        .hero-card {
            background: #fff;
            border-radius: var(--brand-radius-md);
            padding: 20px 24px;
            margin-top: 30px;
            box-shadow: var(--brand-shadow);
            display: inline-flex;
            align-items: center;
            border: 1px solid rgba(255, 255, 255, 0.6);
        }
        .hero-card .icon-wrap {
            width: 42px;
            height: 42px;
            background: rgba(79, 107, 237, 0.1);
            color: var(--brand-primary);
            border-radius: 12px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-right: 14px;
            font-size: 1.1rem;
        }
        .hero-card .info strong {
            font-size: 0.98rem;
            display: block;
        }
        .hero-card .info span {
            font-size: 0.86rem;
            color: var(--brand-text-soft);
        }
        @media (max-width: 768px) {
            .page-hero .hero-card {
                align-items: flex-start;
                flex-wrap: wrap;
            }
            .hero-card .info {
                width: calc(100% - 60px);
            }
        }
        /* 内容卡片 */
        .grid-card {
            background: #fff;
            border-radius: var(--brand-radius-lg);
            border: 1px solid var(--brand-border);
            padding: 26px 24px;
            height: 100%;
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
        }
        .grid-card:hover {
            transform: translateY(-6px);
            border-color: rgba(79, 107, 237, 0.3);
            box-shadow: var(--brand-shadow-hover);
        }
        .grid-card .icon-square {
            width: 50px;
            height: 50px;
            background: rgba(79, 107, 237, 0.08);
            border-radius: 13px;
            color: var(--brand-primary);
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
        }
        .grid-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--brand-text);
        }
        .grid-card p {
            color: var(--brand-text-soft);
            font-size: 0.96rem;
            margin-bottom: 16px;
            line-height: 1.75;
        }
        .grid-card .tag-group {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-top: 6px;
        }
        .tag-badge {
            display: inline-block;
            font-size: 0.76rem;
            font-weight: 500;
            color: var(--brand-text-soft);
            background: var(--brand-bg-neutral);
            border: 1px solid var(--brand-border);
            padding: 3px 12px;
            border-radius: 100px;
            letter-spacing: 0.02em;
        }
        .tag-badge-primary {
            color: var(--brand-primary);
            background: rgba(79, 107, 237, 0.07);
            border-color: rgba(79, 107, 237, 0.12);
        }
        .text-primary-custom {
            color: var(--brand-primary) !important;
        }
        /* process steps */
        .process-card {
            background: #fff;
            border-radius: var(--brand-radius-lg);
            border: 1px solid var(--brand-border);
            padding: 28px 26px;
            position: relative;
            height: 100%;
            transition: all 0.3s ease;
        }
        .process-card:hover {
            box-shadow: var(--brand-shadow);
            border-color: rgba(79, 107, 237, 0.18);
        }
        .process-card .step-num {
            font-size: 2.6rem;
            font-weight: 800;
            color: rgba(79, 107, 237, 0.16);
            line-height: 1;
            display: block;
            margin-bottom: 10px;
        }
        .process-card h3 {
            font-size: 1.18rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .process-card p {
            color: var(--brand-text-soft);
            font-size: 0.96rem;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .study-card {
            background: var(--brand-bg-neutral);
            border-radius: var(--brand-radius-lg);
            padding: 22px 24px;
            height: 100%;
            border-left: 4px solid var(--brand-primary);
        }
        .study-card p {
            color: var(--brand-text);
            margin-bottom: 8px;
            font-weight: 500;
        }
        .study-card small {
            color: var(--brand-text-soft);
            font-size: 0.85rem;
        }
        .faq-accordion .accordion-item {
            border: 1px solid var(--brand-border);
            border-radius: var(--brand-radius-md);
            margin-bottom: 12px;
            background: #fff;
            overflow: hidden;
            transition: border-color 0.2s;
        }
        .faq-accordion .accordion-item:focus-within {
            border-color: var(--brand-primary);
        }
        .faq-accordion .accordion-header {
            background: #fff;
        }
        .faq-accordion .accordion-button {
            background: #fff;
            font-weight: 600;
            color: var(--brand-text);
            padding: 18px 24px;
            transition: 0.2s ease;
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(79, 107, 237, 0.04);
            color: var(--brand-primary);
            box-shadow: none;
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            border: none;
        }
        .faq-accordion .accordion-button::after {
            background-size: 1.2rem;
            opacity: 0.7;
        }
        .faq-accordion .accordion-body {
            padding: 6px 24px 22px;
            color: var(--brand-text-soft);
            line-height: 1.9;
            font-size: 0.98rem;
        }
        .cta-section {
            background: linear-gradient(135deg, var(--brand-primary) 0%, #6f56d0 100%);
            border-radius: var(--brand-radius-lg);
            padding: 70px 30px;
            color: #fff;
            text-align: center;
            overflow: hidden;
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-weight: 800;
            font-size: clamp(1.9rem, 5vw, 2.8rem);
            margin-bottom: 18px;
            color: #fff;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.9);
            max-width: 602px;
            margin: 0 auto 26px;
            font-size: 1.03rem;
            line-height: 1.8;
        }
        .cta-buttons .btn-mid {
            background: #fff;
            color: var(--brand-primary-dark);
            font-weight: 700;
            padding: 12px 28px;
            border-radius: 50px;
            display: inline-block;
            margin: 6px 6px;
            transition: 0.25s all ease;
            border: none;
        }
        .cta-buttons .btn-outline-light-custom {
            background: transparent;
            color: #fff;
            border: 1.7px solid rgba(255, 255, 255, 0.7);
            font-weight: 600;
            padding: 10px 24px;
            border-radius: 50px;
            display: inline-block;
            margin: 6px 6px;
            transition: 0.25s all ease;
        }
        .cta-buttons .btn-outline-light-custom:hover {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
        }
        .cta-section.bg-cover .cta-bg {
            position: absolute;
            inset: 0;
            z-index: -1;
            background-size: cover;
            background-position: center;
            opacity: 0.15;
        }
        .metric-card {
            background: #fff;
            border-radius: var(--brand-radius-md);
            border: 1px solid var(--brand-border);
            padding: 26px;
            text-align: center;
        }
        .metric-card strong {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--brand-primary);
            letter-spacing: -.03em;
        }
        .metric-card span {
            display: block;
            margin-top: 6px;
            color: var(--brand-text-soft);
            font-weight: 500;
            font-size: 0.9rem;
            line-height: 1.4;
        }
        .list-check {
            list-style: none;
            padding-left: 0;
        }
        .list-check li {
            padding-left: 1.6rem;
            position: relative;
            padding-bottom: 14px;
            color: var(--brand-text);
            line-height: 1.75;
        }
        .list-check li::before {
            content: "\f00c";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 0.85rem;
            color: var(--brand-primary);
            position: absolute;
            left: 0;
            top: 5px;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: rgba(79, 107, 237, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
        }
        .image-card {
            background: #fff;
            border: 1px solid var(--brand-border);
            border-radius: var(--brand-radius-lg);
            overflow: hidden;
            transition: box-shadow 0.4s ease;
            height: 100%;
        }
        .image-card:hover {
            box-shadow: var(--brand-shadow);
        }
        .image-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        .image-card-body {
            padding: 23px 22px;
        }
        .image-card-body h3 {
            font-size: 1.14rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .image-card-body p {
            color: var(--brand-text-soft);
            font-size: 0.95rem;
            margin-bottom: 12px;
            line-height: 1.7;
        }
        .border-soft {
            border: 1px solid var(--brand-border);
        }
        /* FOOTER */
        .site-footer {
            background-color: #232838;
            padding: 58px 0 40px;
            color: #B6BDD1;
            font-size: 0.98rem;
        }
        .site-footer .foot-brand {
            color: #fff;
            font-weight: 800;
            font-size: 1.3rem;
            letter-spacing: -0.01em;
        }
        .site-footer .small {
            font-size: 0.9rem;
            line-height: 1.8;
        }
        .foot-links {
            list-style: none;
            padding-left: 0;
            margin: 0;
        }
        .foot-links li {
            margin-bottom: 10px;
        }
        .foot-links a {
            color: #B6BDD1;
            transition: 0.2s color ease;
        }
        .foot-links a:hover {
            color: #fff;
        }
        .site-footer .fw-bold.text-white {
            font-size: 1rem;
            color: #fff !important;
        }
        .site-footer .border-top {
            border-color: #3A3F4B !important;
        }
        .site-footer .border-top span,
        .site-footer .border-top small {
            color: #8B91A5;
        }
        .site-footer img {
            border-radius: 4px;
        }
        /* 内联深色区块 */
        .subsection-dark {
            background: #f8fafc;
            border-radius: var(--brand-radius-lg);
            padding: 44px;
            border: 1px solid var(--brand-border);
        }
        .feature-card-2 {
            background: #fff;
            border: 1px solid var(--brand-border);
            border-radius: 18px;
            padding: 30px;
            height: 100%;
        }
        .feature-card-2 h4 {
            font-weight: 700;
            font-size: 1.16rem;
            margin-bottom: 12px;
        }
        .feature-card-2 p {
            color: var(--brand-text-soft);
            line-height: 1.8;
        }
        .form-control-custom {
            padding: 12px 18px;
            border-radius: 50px;
            border: 1px solid var(--brand-border);
            background: #f8f9fc;
            width: 100%;
        }
        @media (max-width: 768px) {
            .site-footer {
                text-align: left;
                padding-top: 46px;
            }
            .site-footer .col-lg-4,
            .site-footer .col-6 {
                padding-bottom: 18px;
            }
            .section-padding {
                padding: 55px 0;
            }
            .navbar-brand .nav-custom-hide {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .navbar-brand .brand-mark + span {
                font-size: 1.05rem;
            }
            .page-hero .hero-card {
                padding: 16px;
            }
            .page-hero {
                padding: 45px 0 38px;
            }
            .grid-card {
                padding: 20px 18px;
            }
            .metric-card strong {
                font-size: 1.6rem;
            }
            .subsection-dark {
                padding: 26px 18px;
            }
        }
        /* 聚焦 */
        a:focus-visible, button:focus-visible {
            outline: 2px solid var(--brand-primary);
            outline-offset: 4px;
            border-radius: 4px;
        }
        .equal-height {
            height: 100%;
        }
        .table-style {
            width: 100%;
            max-width: 880px;
            border-collapse: separate;
            border-spacing: 0;
        }
        .table-style tr td {
            padding: 14px 18px;
            border-bottom: 1px solid var(--brand-border);
            font-size: 0.96rem;
        }
        .table-style tr td:first-child {
            font-weight: 600;
            color: var(--brand-text);
            width: 30%;
        }
        .table-style tr td:last-child {
            color: var(--brand-text-soft);
            line-height: 1.8;
        }
        .note-box {
            border-left: 4px solid var(--brand-primary);
            background: var(--brand-bg-light);
            border-radius: 10px;
            padding: 14px 16px;
            font-size: 0.95rem;
            margin: 18px 0;
            color: var(--brand-text);
        }
        .row-stat {
            display: flex;
            gap: 24px;
            align-items: stretch;
        }
        @media(max-width: 768px) {
            .row-stat {
                flex-direction: column;
            }
        }
        .keybox {
            background: #fff;
            border-radius: var(--brand-radius-md);
            padding: 28px 30px;
            border: 1px solid var(--brand-border);
            box-shadow: 0 6px 26px rgba(0, 0, 0, 0.03);
            height: 100%;
        }
        .keybox .ico {
            width: 54px;
            height: 54px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--brand-primary), var(--brand-accent));
            border-radius: 14px;
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 18px;
        }
        .keybox h3 {
            font-size: 1.35rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .keybox p {
            color: var(--brand-text-soft);
        }
        .brand-divider {
            width: 46px;
            height: 4px;
            background: var(--brand-primary);
            border-radius: 50px;
            margin: 0 auto;
        }
        .img-radius {
            border-radius: 18px;
        }
        .object-fit-cover {
            object-fit: cover;
        }

/* roulang page: category2 */
:root {
  --primary: #4F46E5;
  --primary-rgb: 79, 70, 229;
  --primary-dark: #3730A3;
  --accent: #7C3AED;
  --accent-soft: #EEF2FF;
  --dark-bg: #0F172A;
  --darker-bg: #020617;
  --card-bg: #FFFFFF;
  --body-bg: #F8FAFC;
  --text-main: #1E293B;
  --text-muted: #64748B;
  --text-light: #94A3B8;
  --border-light: #E2E8F0;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
  --shadow-lg: 0 20px 50px rgba(15,23,42,0.10);
  --grad-primary: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
  --grad-dark: linear-gradient(145deg, #0F172A 0%, #1E1B4B 100%);
  --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-main);
  background: var(--body-bg);
  -webkit-font-smoothing: antialiased;
}
a {
  text-decoration: none;
  color: inherit;
}
a:hover {
  color: var(--primary);
}
img {
  max-width: 100%;
  height: auto;
}
button, input {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  outline: none;
}
ul, ol, p, h1, h2, h3, h4, h5, h6 {
  margin: 0;
  padding: 0;
}
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-right: 24px;
  padding-left: 24px;
}
@media (max-width: 576px) {
  .container {
    padding-right: 16px;
    padding-left: 16px;
  }
}

/* 头部导航 */
.site-header {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.7);
  position: sticky;
  top: 0;
  z-index: 1050;
  transition: box-shadow 0.3s ease;
}
.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}
.site-header .navbar {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  min-height: 74px;
  padding: 0;
}
.navbar-brand {
  display: flex;
  align-items: center;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--text-main);
  letter-spacing: -0.02em;
  white-space: nowrap;
  margin-right: 24px;
}
.navbar-brand .brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: var(--grad-primary);
  border-radius: 12px;
  color: #fff;
  font-weight: 800;
  font-size: 1.2rem;
  margin-right: 10px;
  box-shadow: 0 4px 14px rgba(79,70,229,0.3);
}
.navbar-brand span:last-child {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.navbar-collapse {
  flex: 1;
}
.navbar-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.navbar-nav .nav-link {
  padding: 8px 14px;
  border-radius: 10px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
  transition: all 0.2s ease;
  position: relative;
}
.navbar-nav .nav-link:hover {
  color: var(--primary);
  background: var(--accent-soft);
}
.navbar-nav .nav-link.active {
  color: var(--primary);
  background: rgba(79,70,229,0.08);
  font-weight: 700;
}
.navbar-nav .nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 14px;
  right: 14px;
  height: 2px;
  background: var(--grad-primary);
  border-radius: 2px;
}
.nav-right {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: 16px;
  flex-shrink: 0;
}
.btn-search {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border-light);
  transition: all 0.2s ease;
  cursor: pointer;
}
.btn-search:hover {
  color: var(--primary);
  background: var(--accent-soft);
  border-color: rgba(79,70,229,0.3);
}
.btn-login {
  padding: 8px 16px;
  border-radius: 10px;
  font-weight: 600;
  color: var(--text-main);
  transition: all 0.2s ease;
}
.btn-login:hover {
  background: var(--accent-soft);
  color: var(--primary);
}
.btn-primary-custom {
  padding: 9px 18px;
  border-radius: 10px;
  font-weight: 600;
  color: #fff;
  background: var(--grad-primary);
  box-shadow: 0 4px 14px rgba(79,70,229,0.25);
  transition: all 0.25s ease;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.btn-primary-custom:hover {
  box-shadow: 0 6px 20px rgba(79,70,229,0.35);
  transform: translateY(-2px);
  color: #fff;
}
.btn-primary-custom:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(79,70,229,0.2);
}
.navbar-toggler {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  font-size: 1.15rem;
  color: var(--text-main);
  cursor: pointer;
  transition: background 0.2s ease;
}
.navbar-toggler:hover {
  background: rgba(0,0,0,0.04);
}
@media (max-width: 991px) {
  .navbar-collapse {
    position: fixed;
    top: 74px;
    left: 0;
    right: 0;
    bottom: 0;
    background: #fff;
    z-index: 1040;
    padding: 32px 24px;
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform 0.35s ease;
  }
  .navbar-collapse.show {
    transform: translateX(0);
  }
  .navbar-collapse.collapse {
    display: block;
  }
  .navbar-collapse.collapsing {
    display: block;
    height: auto;
  }
  .navbar-nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .navbar-nav .nav-link {
    font-size: 1.08rem;
    padding: 12px 16px;
    width: 100%;
    border-radius: 14px;
  }
  .navbar-nav .nav-link.active::after {
    display: none;
  }
  .navbar-nav .nav-link.active {
    background: var(--grad-primary);
    color: #fff !important;
  }
  .nav-right {
    margin-left: auto;
  }
  .nav-right .btn-login,
  .nav-right .btn-primary-custom {
    display: none;
  }
  .navbar-toggler {
    display: block;
  }
}
@media (max-width: 576px) {
  .navbar-brand {
    font-size: 1rem;
  }
  .navbar-brand .brand-mark {
    width: 34px;
    height: 34px;
    font-size: 1rem;
  }
  .btn-search {
    width: 36px;
    height: 36px;
  }
}

/* ===== 通用板块样式 ===== */
.section {
  padding: 96px 0;
  position: relative;
}
.section-alt {
  background: #fff;
}
.section-dark {
  background: var(--grad-dark);
  color: #E2E8F0;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
  background: rgba(79,70,229,0.08);
  padding: 6px 14px;
  border-radius: 50px;
  margin-bottom: 16px;
}
.eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}
.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin-bottom: 16px;
}
.section-title .gradient {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 720px;
  line-height: 1.7;
}
.text-white .section-title {
  color: #fff;
}
.text-white .section-subtitle {
  color: rgba(255,255,255,0.7);
}
@media (max-width: 767px) {
  .section { padding: 64px 0; }
  .section-title { font-size: 1.7rem; }
  .section-subtitle { font-size: 1rem; }
}

/* 通用卡片 */
.card-custom {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all 0.3s ease;
}
.card-custom:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(79,70,229,0.2);
  transform: translateY(-4px);
}
.card-custom .card-body {
  padding: 28px;
}

/* 徽章 / 标签 */
.badge-soft {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  line-height: 1.5;
}
.badge-blue { background: #EEF2FF; color: #4F46E5; }
.badge-green { background: #ECFDF5; color: #059669; }
.badge-amber { background: #FFFBEB; color: #D97706; }
.badge-purple { background: #F5F3FF; color: #7C3AED; }
.badge-dark { background: #33415540; color: #334155; }

/* 分页/详情页 Hero */
.page-hero {
  background: var(--grad-dark);
  color: #fff;
  padding: 110px 0 90px;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124,58,237,0.2) 0%, transparent 70%);
}
.page-hero::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79,70,229,0.15) 0%, transparent 70%);
}
.page-hero .container {
  position: relative;
  z-index: 2;
}
.page-hero .hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  color: #E0E7FF;
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}
.page-hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.03em;
  max-width: 840px;
  margin-bottom: 20px;
}
.page-hero p.lead {
  font-size: 1.2rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.75);
  max-width: 860px;
  margin-bottom: 28px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}
.btn-light-custom {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  background: #fff;
  color: var(--primary-dark);
  transition: all 0.25s ease;
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}
.btn-light-custom:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.2);
  color: var(--primary-dark);
}
.btn-outline-light-custom {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  border: 1.5px solid rgba(255,255,255,0.4);
  color: #fff;
  transition: all 0.25s ease;
  background: transparent;
}
.btn-outline-light-custom:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.6);
  color: #fff;
  transform: translateY(-2px);
}
.hero-quick-tips {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.15);
}
.hero-quick-tips .tip-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: rgba(255,255,255,0.65);
}
.hero-quick-tips .tip-item i {
  color: rgba(255,255,255,0.5);
}
@media (max-width: 767px) {
  .page-hero { padding: 72px 0 60px; }
  .page-hero h1 { font-size: 2rem; }
  .page-hero p.lead { font-size: 1.05rem; }
}

/* ===== 用户信息卡片 ===== */
.user-card {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  padding: 28px;
  height: 100%;
  transition: all 0.3s ease;
  position: relative;
}
.user-card:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(79,70,229,0.2);
  transform: translateY(-4px);
}
.user-card .icon-circle {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--primary);
  background: var(--accent-soft);
  margin-bottom: 18px;
}
.user-card .card-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-main);
}
.user-card .card-text {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ===== 使用场景步骤 ===== */
.step-section {
  background: var(--accent-soft);
}
.step-item {
  position: relative;
  display: flex;
  gap: 20px;
  padding: 24px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  margin-bottom: 16px;
  transition: all 0.25s ease;
}
.step-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}
.step-number {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--grad-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  box-shadow: 0 4px 12px rgba(79,70,229,0.3);
}
.step-content h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.step-content p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ===== 答疑 FAQ ===== */
.faq-section {
  background: #fff;
}
.faq-item {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #fff;
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}
.faq-item:hover {
  border-color: rgba(79,70,229,0.3);
  box-shadow: var(--shadow-md);
}
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  font-size: 0.98rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  color: var(--text-main);
  transition: background 0.2s ease;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: '\f107';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  transition: transform 0.3s ease;
  color: var(--primary);
  flex-shrink: 0;
}
.faq-item[open] summary::after {
  transform: rotate(180deg);
}
.faq-item[open] summary {
  background: var(--accent-soft);
}
.faq-body {
  padding: 4px 22px 20px;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
  border-top: 1px solid var(--border-light);
  padding-top: 16px;
}

/* ===== 技术卡片 / 对照区 ===== */
.compare-table {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-light);
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.compare-row {
  display: grid;
  grid-template-columns: 40% 60%;
  gap: 0;
  border-bottom: 1px solid var(--border-light);
}
.compare-row:last-child {
  border-bottom: none;
}
.compare-label {
  padding: 18px 24px;
  font-weight: 700;
  background: rgba(248,250,252,0.9);
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 10px;
}
.compare-label i {
  color: var(--primary);
  font-size: 1.1rem;
  width: 22px;
}
.compare-value {
  padding: 18px 24px;
  color: var(--text-muted);
  line-height: 1.65;
  display: flex;
  align-items: baseline;
}
@media (max-width: 767px) {
  .compare-row { grid-template-columns: 1fr; }
  .compare-label { border-bottom: 1px solid var(--border-light); padding-bottom: 12px; }
  .compare-value { padding-top: 6px; }
}

/* 使用环境提示 */
.status-card {
  background: #fff;
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary);
  padding: 16px 20px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 14px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.status-card.good {
  border-left-color: #10B981;
}
.status-card.info {
  border-left-color: #4F46E5;
}
.status-card.warn {
  border-left-color: #F59E0B;
}
.status-card .status-icon {
  flex-shrink: 0;
  color: #10B981;
  font-size: 1.2rem;
  margin-top: 3px;
}
.status-card.info .status-icon {
  color: #4F46E5;
}
.status-card.warn .status-icon {
  color: #F59E0B;
}
.status-card .status-text strong {
  display: block;
  color: var(--text-main);
  font-weight: 700;
}
.status-card .status-text span {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* ===== CTA 区 ===== */
.cta-section {
  background: var(--grad-dark);
  padding: 80px 0;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
  opacity: 0.12;
}
.cta-inner {
  position: relative;
  z-index: 2;
}
.cta-section h2 {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 18px;
  letter-spacing: -0.02em;
  line-height: 1.3;
}
.cta-section p {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.75);
  max-width: 560px;
  margin: 0 auto 30px;
}
.cta-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
.cta-note {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.45);
  margin-top: 24px;
}
@media (max-width: 767px) {
  .cta-section { padding: 56px 0; }
  .cta-section h2 { font-size: 1.8rem; }
}

/* ===== 统计数字条 ===== */
.stats-bar {
  background: var(--voice-bg);
}
.stats-item {
  text-align: center;
  padding: 8px 0;
  position: relative;
}
.stats-number {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.3;
}
.stats-meta {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 8px;
}
.stats-bar-main {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-md);
  padding: 32px;
}

/* ===== 文章内容排版 ===== */
.content-block {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  padding: 32px;
  margin-bottom: 28px;
}
.content-main {
  max-width: 840px;
  margin: 0 auto;
  padding-top: 56px;
  padding-bottom: 72px;
}
.content-main .lead {
  font-size: 1.18rem;
  color: var(--text-muted);
  line-height: 1.9;
  margin-bottom: 32px;
}
.content-main h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin: 48px 0 18px;
  color: var(--text-main);
  padding-bottom: 10px;
  border-bottom: 2px solid var(--accent-soft);
}
.content-main h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 36px 0 12px;
  color: var(--text-main);
}
.content-main p {
  color: var(--text-muted);
  line-height: 1.85;
  margin-bottom: 20px;
  font-size: 1.02rem;
}
.content-main ul:not(.share-items) {
  margin: 16px 0 24px;
  padding-left: 0;
  list-style: none;
}
.content-main ul:not(.share-items) li {
  padding: 8px 0 8px 32px;
  position: relative;
  color: var(--text-muted);
  line-height: 1.7;
  font-size: 0.98rem;
}
.content-main ul:not(.share-items) li::before {
  content: '\f00d';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  position: absolute;
  left: 0;
  top: 8px;
  color: var(--primary);
  font-size: 0.75rem;
}
.content-main ul:not(.share-items) li::marker {
  display: none;
}
.content-main .quote-note {
  background: var(--accent-soft);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  border-left: 4px solid var(--primary);
  margin: 28px 0;
  font-size: 0.95rem;
  color: #334155;
  line-height: 1.7;
}

/* 相关列表 */
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 16px;
}
.related-card {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 18px;
  transition: all 0.2s ease;
  display: flex;
  gap: 12px;
  align-items: center;
}
.related-card:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(79,70,229,0.3);
  transform: translateY(-2px);
}
.related-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(79,70,229,0.1);
  color: var(--primary);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.related-text h4 {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 4px;
}
.related-text p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.85rem;
  padding: 14px 0;
}
.breadcrumb a {
  color: rgba(148,163,184,0.85);
  font-weight: 400;
  transition: color 0.2s ease;
}
.breadcrumb a:hover {
  color: #a5b4fc;
}
.breadcrumb .divider {
  color: rgba(148,163,184,0.5);
  font-size: 0.7rem;
}
.breadcrumb .current {
  color: rgba(226,232,240,0.6);
}

/* 覆盖 info 面板和 chip */
.info-panel {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  height: 100%;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.info-panel:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.chip-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.chip {
  padding: 6px 12px;
  background: var(--accent-soft);
  color: var(--primary);
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 700;
}
.chip-dark {
  background: rgba(255,255,255,0.1);
  color: #A5B4FC;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--dark-bg);
  color: var(--text-light);
  padding: 72px 0 40px;
  font-size: 0.9rem;
}
.site-footer .foot-brand {
  font-size: 1.35rem;
  font-weight: 800;
  background: linear-gradient(135deg, #fff, #c7d2fe);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}
.site-footer p.small {
  color: rgba(255,255,255,0.5);
  line-height: 1.7;
}
.site-footer .fw-bold {
  color: rgba(255,255,255,0.82);
  font-size: 0.95rem;
}
.foot-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.foot-links li {
  margin-bottom: 10px;
}
.foot-links a {
  color: rgba(255,255,255,0.5);
  font-size: 0.86rem;
  text-decoration: none;
  transition: color 0.2s ease;
  position: relative;
  padding-left: 0;
}
.foot-links a:hover {
  color: #a5b4fc;
  padding-left: 4px;
}
.site-footer .text-white {
  color: rgba(255,255,255,0.9);
}
@media (max-width: 767px) {
  .site-footer {
    padding: 48px 0 32px;
    text-align: center;
  }
  .site-footer .text-md-start {
    text-align: center !important;
  }
  .site-footer .foot-links li a {
    display: inline-block;
  }
}

/* 其他必要精细 */
.seed-icons-sm {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-right: 8px;
  width: 22px;
  height: 22px;
  border-radius: 5px;
  background: rgba(79,70,229,0.1);
  color: var(--primary);
  font-size: 0.75rem;
  vertical-align: -2px;
}
.btn:focus,
.btn:focus-visible,
.navbar-toggler:focus-visible {
  outline: 2px solid rgba(79,70,229,0.6);
  outline-offset: 2px;
  box-shadow: none;
}

/* roulang page: category3 */
:root{
    --bg:#0B0E13;
    --bg-soft:#10141B;
    --surface:#151A23;
    --surface-2:#1B212C;
    --line:#252C38;
    --line-soft:#1E242E;
    --text:#E9EEF6;
    --muted:#96A1B2;
    --muted-2:#6F7A8C;
    --brand:#4F7CFF;
    --brand-2:#33D6A6;
    --brand-soft:rgba(79,124,255,.15);
    --warn:#FFB648;
    --radius-lg:22px;
    --radius:14px;
    --radius-sm:10px;
    --shadow:0 18px 40px -24px rgba(0,0,0,.85);
    --shadow-hover:0 28px 54px -22px rgba(0,0,0,.95);
    --container:1200px;
    --ease:.25s cubic-bezier(.4,.2,.2,1);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--brand);}
button,input{font-family:inherit;}
h1,h2,h3,h4,h5{margin:0;font-weight:700;letter-spacing:.2px;line-height:1.35;}
p{margin:0 0 1rem;}
ul{margin:0;padding:0;list-style:none;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding-left:20px;padding-right:20px;}

/* ---------- header ---------- */
.site-header{
    position:sticky;top:0;z-index:1030;
    background:rgba(11,14,19,.86);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    border-bottom:1px solid var(--line);
}
.site-header .navbar{padding:14px 0;gap:14px;}
.navbar-brand{
    display:flex;align-items:center;gap:10px;
    color:#fff;font-weight:700;font-size:1.02rem;letter-spacing:.3px;
    white-space:nowrap;
}
.navbar-brand:hover{color:#fff;}
.brand-mark{
    width:34px;height:34px;border-radius:11px;flex:0 0 34px;
    display:grid;place-items:center;
    background:linear-gradient(135deg,var(--brand),var(--brand-2));
    color:#06121E;font-weight:800;font-size:1rem;
    box-shadow:0 8px 18px -8px rgba(79,124,255,.9);
}
.navbar-toggler{
    color:var(--text);font-size:1.15rem;padding:6px 10px;
    border-radius:var(--radius-sm);background:var(--surface-2);
    border:1px solid var(--line);
}
.navbar-toggler:focus{box-shadow:0 0 0 3px var(--brand-soft);}
.navbar-collapse .navbar-nav{gap:2px;}
.nav-link{
    color:var(--muted);
    font-size:.95rem;
    padding:8px 14px !important;
    border-radius:999px;
    font-weight:500;
    transition:color var(--ease),background var(--ease);
}
.nav-link:hover{color:var(--text);background:var(--surface-2);}
.nav-link.active{
    color:#fff;background:var(--brand-soft);
    box-shadow:inset 0 0 0 1px rgba(79,124,255,.35);
}
.nav-right{display:flex;align-items:center;gap:10px;}
.btn-search{
    width:38px;height:38px;border-radius:50%;
    background:var(--surface-2);border:1px solid var(--line);
    color:var(--muted);display:grid;place-items:center;
    transition:all var(--ease);
}
.btn-search:hover{color:#fff;border-color:var(--brand);transform:translateY(-1px);}
.btn-login{
    color:var(--muted);font-size:.94rem;padding:8px 4px;
}
.btn-login:hover{color:#fff;}
.btn-primary-custom{
    display:inline-flex;align-items:center;gap:7px;
    background:linear-gradient(135deg,var(--brand),#7A5CFF);
    color:#fff;font-size:.92rem;font-weight:600;
    padding:9px 20px;border-radius:999px;
    box-shadow:0 12px 26px -14px rgba(79,124,255,1);
    transition:transform var(--ease),box-shadow var(--ease),filter var(--ease);
    white-space:nowrap;
}
.btn-primary-custom:hover{
    color:#fff;transform:translateY(-2px);
    box-shadow:0 18px 32px -14px rgba(79,124,255,1);filter:brightness(1.06);
}

/* ---------- hero ---------- */
.page-hero{
    position:relative;
    padding:92px 0 80px;
    background:
        linear-gradient(100deg,rgba(8,11,17,.94) 12%,rgba(8,11,17,.78) 58%,rgba(8,11,17,.62) 100%),
        url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
    border-bottom:1px solid var(--line);
    overflow:hidden;
}
.page-hero::after{
    content:"";position:absolute;inset:auto 0 0 0;height:1px;
    background:linear-gradient(90deg,transparent,rgba(79,124,255,.55),transparent);
}
.hero-inner{max-width:760px;position:relative;z-index:2;}
.eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:.8rem;letter-spacing:1.4px;
    color:var(--brand-2);text-transform:uppercase;
    background:rgba(51,214,166,.1);
    border:1px solid rgba(51,214,166,.28);
    padding:6px 14px;border-radius:999px;margin-bottom:20px;
}
.page-hero h1{
    font-size:clamp(1.75rem,3.6vw,2.7rem);
    color:#fff;margin-bottom:18px;
}
.page-hero h1 .hl{
    background:linear-gradient(120deg,var(--brand),var(--brand-2));
    -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-lead{color:#B9C3D2;font-size:1.06rem;max-width:660px;margin-bottom:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.btn-ghost{
    display:inline-flex;align-items:center;gap:8px;
    padding:11px 24px;border-radius:999px;
    border:1px solid var(--line);color:var(--text);
    background:rgba(255,255,255,.03);font-weight:600;font-size:.94rem;
    transition:all var(--ease);
}
.btn-ghost:hover{border-color:var(--brand);color:#fff;background:var(--brand-soft);transform:translateY(-2px);}
.hero-meta{
    display:flex;flex-wrap:wrap;gap:26px;margin-top:38px;
    padding-top:24px;border-top:1px solid rgba(255,255,255,.08);
}
.hero-meta div{font-size:.86rem;color:var(--muted);}
.hero-meta strong{display:block;color:#fff;font-size:1.28rem;font-weight:700;letter-spacing:.4px;}

/* ---------- sections ---------- */
.section{padding:82px 0;}
.section-alt{background:var(--bg-soft);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);}
.section-head{max-width:720px;margin-bottom:44px;}
.section-tag{
    display:inline-block;font-size:.78rem;letter-spacing:1.6px;
    color:var(--brand);text-transform:uppercase;font-weight:700;margin-bottom:12px;
}
.section-head h2{font-size:clamp(1.4rem,2.6vw,2rem);color:#fff;margin-bottom:14px;}
.section-head p{color:var(--muted);margin:0;}

.card-grid{display:grid;gap:22px;}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}
.grid-2{grid-template-columns:repeat(2,1fr);}

.feat-card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    padding:26px;
    height:100%;
    transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.feat-card:hover{transform:translateY(-4px);border-color:rgba(79,124,255,.5);box-shadow:var(--shadow-hover);}
.feat-icon{
    width:46px;height:46px;border-radius:14px;
    display:grid;place-items:center;margin-bottom:18px;
    background:var(--brand-soft);color:var(--brand);font-size:1.15rem;
}
.feat-card h3{font-size:1.06rem;color:#fff;margin-bottom:10px;}
.feat-card p{color:var(--muted);font-size:.94rem;margin:0;}

.media-card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    overflow:hidden;
    height:100%;
    transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.media-card:hover{transform:translateY(-4px);border-color:rgba(79,124,255,.45);box-shadow:var(--shadow-hover);}
.media-card .thumb{position:relative;aspect-ratio:16/10;overflow:hidden;}
.media-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);}
.media-card:hover .thumb img{transform:scale(1.05);}
.media-card .thumb::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(11,14,19,0) 40%,rgba(11,14,19,.75) 100%);
}
.media-card .body{padding:22px 24px 26px;}
.media-card h3{font-size:1.04rem;color:#fff;margin-bottom:9px;}
.media-card p{color:var(--muted);font-size:.93rem;margin:0;}
.badge-tag{
    display:inline-block;font-size:.75rem;font-weight:600;
    padding:4px 11px;border-radius:999px;margin-bottom:12px;
    background:rgba(51,214,166,.12);color:var(--brand-2);
    border:1px solid rgba(51,214,166,.28);
}
.badge-tag.blue{background:var(--brand-soft);color:#8FB0FF;border-color:rgba(79,124,255,.32);}

/* ---------- stat ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.stat-card{
    background:linear-gradient(160deg,var(--surface-2),var(--surface));
    border:1px solid var(--line);border-radius:var(--radius);
    padding:24px 22px;
}
.stat-card .num{
    font-size:1.9rem;font-weight:800;letter-spacing:.5px;
    background:linear-gradient(120deg,var(--brand),var(--brand-2));
    -webkit-background-clip:text;background-clip:text;color:transparent;
    line-height:1.2;
}
.stat-card .num span{font-size:.95rem;font-weight:600;margin-left:2px;}
.stat-card .label{color:var(--muted);font-size:.88rem;margin-top:8px;}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:step;}
.step{
    position:relative;
    background:var(--surface);border:1px solid var(--line);
    border-radius:var(--radius-lg);padding:28px 24px 26px;
    transition:border-color var(--ease),transform var(--ease);
}
.step:hover{border-color:rgba(51,214,166,.45);transform:translateY(-3px);}
.step::before{
    counter-increment:step;content:"0" counter(step);
    font-size:.82rem;font-weight:800;letter-spacing:1px;
    color:var(--brand-2);
    display:inline-block;margin-bottom:14px;
    padding:4px 10px;border-radius:8px;
    background:rgba(51,214,166,.1);
}
.step h3{font-size:1.02rem;color:#fff;margin-bottom:9px;}
.step p{color:var(--muted);font-size:.92rem;margin:0;}

/* ---------- checklist ---------- */
.checklist li{
    display:flex;gap:12px;align-items:flex-start;
    padding:13px 0;border-bottom:1px dashed var(--line);
    color:var(--muted);font-size:.95rem;
}
.checklist li:last-child{border-bottom:0;}
.checklist i{color:var(--brand-2);margin-top:5px;font-size:.85rem;}

/* ---------- table-like rows ---------- */
.row-list{border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;}
.row-item{
    display:grid;grid-template-columns:1.1fr 1fr 1.3fr;gap:18px;
    padding:20px 24px;background:var(--surface);
    border-bottom:1px solid var(--line-soft);
    align-items:center;transition:background var(--ease);
}
.row-item:last-child{border-bottom:0;}
.row-item:hover{background:var(--surface-2);}
.row-head{
    background:var(--surface-2);
    font-size:.82rem;letter-spacing:1px;color:var(--muted-2);
    text-transform:uppercase;font-weight:700;
}
.row-item .syn{color:#fff;font-weight:600;font-size:.96rem;}
.row-item .judge{color:var(--warn);font-size:.9rem;}
.row-item .act{color:var(--muted);font-size:.9rem;}

/* ---------- quotes ---------- */
.quote-card{
    background:var(--surface);border:1px solid var(--line);
    border-radius:var(--radius);padding:24px;height:100%;
}
.quote-card p{color:#C6CFDD;font-size:.94rem;margin-bottom:16px;}
.quote-who{display:flex;align-items:center;gap:12px;}
.avatar{
    width:38px;height:38px;border-radius:50%;flex:0 0 38px;
    display:grid;place-items:center;font-weight:700;font-size:.86rem;
    background:var(--brand-soft);color:#8FB0FF;
}
.quote-who .name{font-size:.9rem;color:#fff;font-weight:600;}
.quote-who .role{font-size:.78rem;color:var(--muted-2);}
.stars{color:var(--warn);font-size:.78rem;margin-bottom:12px;letter-spacing:2px;}

/* ---------- faq ---------- */
.faq-wrap{max-width:900px;margin:0 auto;}
.accordion-item{
    background:var(--surface) !important;
    border:1px solid var(--line) !important;
    border-radius:var(--radius) !important;
    margin-bottom:14px;overflow:hidden;
}
.accordion-button{
    background:var(--surface) !important;
    color:var(--text) !important;
    font-weight:600;font-size:1rem;
    padding:19px 22px;box-shadow:none !important;
    border-radius:var(--radius) !important;
}
.accordion-button:not(.collapsed){
    background:var(--surface-2) !important;
    color:#fff !important;
}
.accordion-button::after{
    background-image:none;content:"\f067";
    font-family:"Font Awesome 6 Free";font-weight:900;
    font-size:.8rem;color:var(--brand);transform:none;
    width:auto;height:auto;transition:transform var(--ease);
}
.accordion-button:not(.collapsed)::after{transform:rotate(45deg);}
.accordion-body{
    color:var(--muted);font-size:.94rem;
    padding:0 22px 22px;line-height:1.85;
}

/* ---------- cta ---------- */
.cta-band{
    position:relative;
    border-radius:26px;overflow:hidden;
    padding:60px 56px;
    background:
        linear-gradient(110deg,rgba(9,13,20,.94),rgba(9,13,20,.7)),
        url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
    border:1px solid rgba(79,124,255,.3);
}
.cta-band h2{font-size:clamp(1.4rem,2.5vw,1.95rem);color:#fff;margin-bottom:14px;}
.cta-band p{color:#B9C3D2;max-width:600px;margin-bottom:26px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- footer ---------- */
.site-footer{
    background:#080B10;
    border-top:1px solid var(--line);
    padding:64px 0 28px;
    color:var(--muted);
}
.foot-brand{
    font-size:1.15rem;font-weight:700;color:#fff;letter-spacing:.4px;
    display:flex;align-items:center;gap:10px;
}
.foot-brand::before{
    content:"H";width:30px;height:30px;border-radius:9px;
    display:grid;place-items:center;font-size:.9rem;
    background:linear-gradient(135deg,var(--brand),var(--brand-2));
    color:#06121E;font-weight:800;
}
.foot-links{list-style:none;padding:0;margin:0;}
.foot-links li{margin-bottom:11px;}
.foot-links a{color:var(--muted);font-size:.92rem;}
.foot-links a:hover{color:var(--brand);padding-left:3px;}
.site-footer .small{color:var(--muted-2);}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
    .container{max-width:100%;}
    .grid-4{grid-template-columns:repeat(2,1fr);}
    .stat-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:991.98px){
    .navbar-collapse{
        margin-top:14px;padding:16px;
        background:var(--surface);
        border:1px solid var(--line);
        border-radius:var(--radius);
    }
    .navbar-nav{gap:6px;}
    .nav-link{padding:10px 14px !important;}
    .nav-right{margin-left:auto;}
    .section{padding:64px 0;}
    .grid-3{grid-template-columns:repeat(2,1fr);}
    .steps{grid-template-columns:repeat(2,1fr);}
    .cta-band{padding:44px 32px;}
}
@media (max-width:767.98px){
    .page-hero{padding:64px 0 56px;}
    .hero-meta{gap:18px;}
    .hero-meta strong{font-size:1.1rem;}
    .grid-2,.grid-3,.grid-4,.steps{grid-template-columns:1fr;}
    .row-item{grid-template-columns:1fr;gap:6px;padding:18px 20px;}
    .row-head{display:none;}
    .row-item .judge::before{content:"判断：";color:var(--muted-2);}
    .row-item .act::before{content:"处理：";color:var(--muted-2);}
    .section-head{margin-bottom:32px;}
}
@media (max-width:575.98px){
    .btn-login{display:none;}
    .navbar-brand{font-size:.95rem;}
    .stat-grid{grid-template-columns:1fr;}
    .page-hero h1{font-size:1.55rem;}
    .cta-band{padding:34px 22px;}
    .hero-actions .btn-ghost,.hero-actions .btn-primary-custom{width:100%;justify-content:center;}
}

/* roulang page: article */
:root{
    --bg:#F3F5FB;
    --surface:#FFFFFF;
    --surface-2:#F8FAFF;
    --ink:#101528;
    --ink-2:#2C3350;
    --muted:#606A85;
    --line:#E4E8F3;
    --line-strong:#D3D9EA;
    --brand:#4B5BF6;
    --brand-dark:#3443D6;
    --brand-soft:#EEF0FF;
    --violet:#7B3FE4;
    --cyan:#0FB5CE;
    --dark:#0D1220;
    --dark-2:#151B2E;
    --ok:#12A26A;
    --warn:#E08A16;
    --radius-sm:10px;
    --radius:16px;
    --radius-lg:24px;
    --shadow-sm:0 2px 8px rgba(16,21,40,.06);
    --shadow:0 14px 34px -18px rgba(16,21,40,.28);
    --shadow-lg:0 28px 60px -28px rgba(16,21,40,.36);
    --sp:clamp(56px,7vw,96px);
    --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
    margin:0;
    font-family:var(--font);
    color:var(--ink);
    background:var(--bg);
    line-height:1.75;
    font-size:16px;
    -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{color:var(--brand-dark)}
button,input{font-family:inherit}
h1,h2,h3,h4{color:var(--ink);font-weight:800;line-height:1.3;letter-spacing:-.01em}
p{margin:0 0 1rem}
:focus-visible{outline:3px solid rgba(75,91,246,.45);outline-offset:2px;border-radius:6px}
.container{width:100%;padding-left:20px;padding-right:20px;margin:0 auto;max-width:1200px}

/* ---------- header ---------- */
.site-header{
    position:sticky;top:0;z-index:1030;
    background:rgba(255,255,255,.92);
    backdrop-filter:saturate(180%) blur(14px);
    border-bottom:1px solid var(--line);
}
.site-header .navbar{padding:10px 0;gap:14px;align-items:center}
.navbar-brand{
    display:flex;align-items:center;gap:10px;
    font-weight:800;font-size:19px;color:var(--ink)!important;
    letter-spacing:-.02em;white-space:nowrap;
}
.brand-mark{
    width:36px;height:36px;flex:0 0 36px;
    display:inline-flex;align-items:center;justify-content:center;
    border-radius:11px;
    background:linear-gradient(135deg,var(--brand) 0%,var(--violet) 100%);
    color:#fff;font-weight:900;font-size:17px;
    box-shadow:0 8px 18px -8px rgba(75,91,246,.85);
}
.navbar-toggler{color:var(--ink);padding:8px 10px;border-radius:10px}
.navbar-toggler:focus{box-shadow:none}
.navbar-nav .nav-link{
    color:var(--ink-2);
    font-size:15px;
    font-weight:600;
    padding:8px 14px;
    border-radius:999px;
    transition:background .2s ease,color .2s ease;
}
.navbar-nav .nav-link:hover{background:var(--brand-soft);color:var(--brand-dark)}
.navbar-nav .nav-link.active{
    background:linear-gradient(135deg,var(--brand) 0%,var(--violet) 100%);
    color:#fff;
    box-shadow:0 10px 22px -12px rgba(75,91,246,.9);
}
.nav-right{
    display:flex;align-items:center;gap:10px;
    margin-left:auto;
}
.btn-search{
    width:38px;height:38px;border-radius:50%;
    border:1px solid var(--line-strong);
    background:var(--surface);color:var(--muted);
    display:inline-flex;align-items:center;justify-content:center;
    transition:all .2s ease;
}
.btn-search:hover{color:var(--brand);border-color:var(--brand);background:var(--brand-soft)}
.btn-login{
    font-weight:600;font-size:15px;color:var(--ink-2);
    padding:8px 14px;border-radius:999px;
}
.btn-login:hover{background:var(--surface-2);color:var(--brand-dark)}
.btn-primary-custom{
    display:inline-flex;align-items:center;gap:7px;
    background:linear-gradient(135deg,var(--brand) 0%,var(--violet) 100%);
    color:#fff!important;font-weight:700;font-size:15px;
    padding:10px 20px;border-radius:999px;
    box-shadow:0 14px 26px -14px rgba(75,91,246,.95);
    transition:transform .2s ease,box-shadow .2s ease;
}
.btn-primary-custom:hover{transform:translateY(-2px);box-shadow:0 18px 32px -14px rgba(75,91,246,.95)}

/* ---------- hero ---------- */
.article-hero{
    position:relative;
    padding:clamp(46px,6vw,78px) 0 clamp(40px,5vw,64px);
    background-image:linear-gradient(180deg,rgba(9,13,26,.86) 0%,rgba(13,18,32,.92) 100%),url(/assets/images/backpic/back-1.png);
    background-size:cover;
    background-position:center;
    color:#fff;
    overflow:hidden;
}
.article-hero::after{
    content:"";position:absolute;inset:auto 0 0 0;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.25),transparent);
}
.breadcrumb-line{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    font-size:13px;color:rgba(255,255,255,.62);margin-bottom:18px;
}
.breadcrumb-line a{color:rgba(255,255,255,.82)}
.breadcrumb-line a:hover{color:#fff}
.breadcrumb-line i{font-size:9px;opacity:.7}
.badge-cat{
    display:inline-flex;align-items:center;gap:7px;
    background:rgba(255,255,255,.12);
    border:1px solid rgba(255,255,255,.22);
    color:#DDE2FF;
    font-size:12.5px;font-weight:700;letter-spacing:.04em;
    padding:6px 14px;border-radius:999px;
    margin-bottom:18px;
}
.article-hero h1{
    color:#fff;
    font-size:clamp(26px,3.5vw,44px);
    line-height:1.28;
    margin:0 0 20px;
    max-width:920px;
}
.article-meta{
    display:flex;flex-wrap:wrap;gap:12px 22px;
    font-size:14px;color:rgba(255,255,255,.7);
}
.article-meta span{display:inline-flex;align-items:center;gap:8px}
.article-meta i{color:rgba(255,255,255,.5)}

/* ---------- sections ---------- */
.section{padding:var(--sp) 0}
.section-head{max-width:760px;margin-bottom:clamp(28px,4vw,46px)}
.section-eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12.5px;font-weight:800;letter-spacing:.12em;
    text-transform:uppercase;color:var(--brand);
    background:var(--brand-soft);
    padding:6px 14px;border-radius:999px;margin-bottom:16px;
}
.section-title{font-size:clamp(22px,2.6vw,33px);margin:0 0 12px}
.section-sub{color:var(--muted);font-size:16px;margin:0}

/* ---------- article layout ---------- */
.article-layout{
    display:grid;
    grid-template-columns:minmax(0,1fr) 320px;
    gap:34px;
    align-items:start;
}
.article-card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    box-shadow:var(--shadow);
    padding:clamp(24px,3.4vw,48px);
}
.article-body{font-size:17px;color:var(--ink-2);word-wrap:break-word}
.article-body > *:first-child{margin-top:0}
.article-body h2{
    font-size:clamp(20px,2.2vw,26px);
    margin:2.2em 0 .8em;
    padding-left:16px;
    border-left:5px solid var(--brand);
    line-height:1.4;
}
.article-body h3{font-size:19px;margin:1.8em 0 .6em;color:var(--ink)}
.article-body h4{font-size:17px;margin:1.5em 0 .5em;color:var(--ink)}
.article-body p{margin:0 0 1.15em;line-height:1.9}
.article-body ul,.article-body ol{margin:0 0 1.3em;padding-left:1.35em}
.article-body li{margin-bottom:.55em;line-height:1.85}
.article-body strong{color:var(--ink);font-weight:700}
.article-body a{border-bottom:1px solid rgba(75,91,246,.35)}
.article-body a:hover{border-bottom-color:var(--brand)}
.article-body img{border-radius:var(--radius);margin:1.4em 0;box-shadow:var(--shadow-sm)}
.article-body blockquote{
    margin:1.6em 0;
    padding:18px 22px;
    background:var(--surface-2);
    border-left:4px solid var(--violet);
    border-radius:0 var(--radius-sm) var(--radius-sm) 0;
    color:var(--ink-2);
}
.article-body table{width:100%;border-collapse:collapse;margin:1.5em 0;font-size:15px;overflow:hidden;border-radius:var(--radius-sm)}
.article-body th,.article-body td{border:1px solid var(--line);padding:11px 14px;text-align:left}
.article-body th{background:var(--surface-2);font-weight:700;color:var(--ink)}
.article-body code{background:var(--surface-2);padding:2px 7px;border-radius:6px;font-size:14px;color:var(--violet)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.2em 0}

/* ---------- aside ---------- */
.article-aside{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
.aside-card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius);
    padding:22px;
    box-shadow:var(--shadow-sm);
}
.aside-card h3{
    font-size:15px;margin:0 0 14px;
    display:flex;align-items:center;gap:9px;
    color:var(--ink);
}
.aside-card h3 i{color:var(--brand)}
.aside-list{list-style:none;margin:0;padding:0}
.aside-list li{margin-bottom:4px}
.aside-list a{
    display:flex;align-items:center;gap:10px;
    padding:9px 12px;border-radius:10px;
    font-size:14.5px;color:var(--ink-2);font-weight:600;
    transition:background .2s ease,color .2s ease,transform .2s ease;
}
.aside-list a:hover{background:var(--brand-soft);color:var(--brand-dark);transform:translateX(3px)}
.aside-list i{font-size:11px;color:var(--line-strong);transition:color .2s ease}
.aside-list a:hover i{color:var(--brand)}
.aside-cta{
    background:linear-gradient(150deg,var(--dark) 0%,#1B2340 100%);
    border:1px solid #232B45;
    color:rgba(255,255,255,.78);
}
.aside-cta h3{color:#fff}
.aside-cta p{font-size:14px;color:rgba(255,255,255,.7);margin-bottom:16px}
.aside-cta .btn-primary-custom{width:100%;justify-content:center}
.aside-stat{
    display:flex;justify-content:space-between;
    font-size:13.5px;color:rgba(255,255,255,.62);
    padding:8px 0;border-bottom:1px dashed rgba(255,255,255,.14);
}
.aside-stat:last-of-type{border-bottom:0}
.aside-stat b{color:#fff;font-weight:700}

/* ---------- cards ---------- */
.grid-cards{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
    gap:24px;
}
.content-card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius);
    overflow:hidden;
    display:flex;flex-direction:column;
    box-shadow:var(--shadow-sm);
    transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.content-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:#CBD3EE}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--surface-2)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.content-card:hover .card-media img{transform:scale(1.06)}
.card-tag{
    position:absolute;top:12px;left:12px;
    background:rgba(13,18,32,.78);
    color:#fff;font-size:12px;font-weight:700;
    padding:5px 12px;border-radius:999px;
    backdrop-filter:blur(6px);
}
.card-body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1}
.card-body h3{font-size:17.5px;margin:0 0 10px;line-height:1.45}
.card-body p{font-size:14.5px;color:var(--muted);line-height:1.8;margin:0 0 16px;flex:1}
.card-link{
    font-size:14.5px;font-weight:700;color:var(--brand);
    display:inline-flex;align-items:center;gap:8px;
}
.card-link i{transition:transform .2s ease;font-size:12px}
.card-link:hover i{transform:translateX(4px)}

/* ---------- steps ---------- */
.step-wrap{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    padding:clamp(24px,3.4vw,44px);
    box-shadow:var(--shadow-sm);
}
.step-list{list-style:none;margin:0;padding:0;display:grid;gap:18px}
.step-item{
    display:flex;gap:18px;align-items:flex-start;
    padding:18px 20px;
    border:1px solid var(--line);
    border-radius:var(--radius);
    background:var(--surface-2);
    transition:border-color .2s ease,background .2s ease,transform .2s ease;
}
.step-item:hover{border-color:#C9D2F0;background:#fff;transform:translateY(-3px)}
.step-num{
    flex:0 0 40px;width:40px;height:40px;border-radius:12px;
    display:inline-flex;align-items:center;justify-content:center;
    background:linear-gradient(135deg,var(--brand) 0%,var(--violet) 100%);
    color:#fff;font-weight:800;font-size:15px;
    box-shadow:0 10px 20px -12px rgba(75,91,246,.95);
}
.step-item h4{margin:0 0 6px;font-size:16.5px}
.step-item p{margin:0;font-size:14.5px;color:var(--muted)}

/* ---------- faq ---------- */
.faq-wrap{max-width:920px;margin:0 auto}
.faq-wrap .accordion-item{
    border:1px solid var(--line);
    border-radius:var(--radius)!important;
    margin-bottom:14px;
    overflow:hidden;
    background:var(--surface);
    box-shadow:var(--shadow-sm);
}
.faq-wrap .accordion-button{
    font-weight:700;font-size:16.5px;color:var(--ink);
    background:var(--surface);
    padding:20px 22px;
    box-shadow:none;
}
.faq-wrap .accordion-button:not(.collapsed){background:var(--brand-soft);color:var(--brand-dark)}
.faq-wrap .accordion-button:focus{box-shadow:none;border-color:var(--line)}
.faq-wrap .accordion-body{
    padding:4px 22px 22px;
    color:var(--muted);font-size:15px;line-height:1.85;
    background:var(--surface);
}

/* ---------- cta ---------- */
.cta-band{
    position:relative;
    border-radius:var(--radius-lg);
    padding:clamp(32px,4.5vw,58px);
    background-image:linear-gradient(120deg,rgba(11,15,28,.9) 0%,rgba(35,27,80,.86) 100%),url(/assets/images/backpic/back-2.webp);
    background-size:cover;background-position:center;
    color:#fff;
    overflow:hidden;
    box-shadow:var(--shadow-lg);
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,32px);margin:0 0 12px;max-width:640px}
.cta-band p{color:rgba(255,255,255,.76);max-width:640px;margin:0 0 26px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
.btn-ghost{
    display:inline-flex;align-items:center;gap:8px;
    padding:11px 22px;border-radius:999px;
    border:1px solid rgba(255,255,255,.34);
    color:#fff!important;font-weight:600;font-size:15px;
    transition:background .2s ease,border-color .2s ease;
}
.btn-ghost:hover{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.6)}

/* ---------- empty ---------- */
.empty-box{
    text-align:center;
    padding:clamp(48px,7vw,90px) 24px;
}
.empty-box i{font-size:44px;color:var(--line-strong);margin-bottom:20px;display:block}
.empty-box h2{font-size:24px;margin:0 0 12px}
.empty-box p{color:var(--muted);margin:0 0 24px}

/* ---------- footer ---------- */
.site-footer{
    background:var(--dark);
    color:rgba(255,255,255,.66);
    padding:clamp(48px,6vw,80px) 0 30px;
    margin-top:var(--sp);
}
.foot-brand{
    font-size:20px;font-weight:800;color:#fff;letter-spacing:-.02em;
    display:flex;align-items:center;gap:10px;
}
.foot-brand::before{
    content:"H";
    width:32px;height:32px;border-radius:10px;
    display:inline-flex;align-items:center;justify-content:center;
    font-size:15px;font-weight:900;color:#fff;
    background:linear-gradient(135deg,var(--brand) 0%,var(--violet) 100%);
}
.foot-links{list-style:none;padding:0;margin:0}
.foot-links li{margin-bottom:10px}
.foot-links a{color:rgba(255,255,255,.66);font-size:14.5px}
.foot-links a:hover{color:#fff}
.site-footer .small{font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.56)}

@media (max-width:1024px){
    .article-layout{grid-template-columns:1fr}
    .article-aside{position:static}
    .navbar-nav{gap:6px}
    .navbar-nav .nav-link{padding:8px 12px;font-size:14.5px}
}
@media (max-width:991.98px){
    .site-header .navbar{padding:8px 0}
    .navbar-collapse{
        margin-top:12px;padding:14px;
        background:var(--surface);
        border:1px solid var(--line);
        border-radius:var(--radius);
        box-shadow:var(--shadow);
    }
    .navbar-nav .nav-link{width:100%}
    .nav-right{margin-left:auto}
    .btn-login{display:none}
}
@media (max-width:768px){
    body{font-size:15.5px}
    .article-body{font-size:16px}
    .article-meta{gap:8px 16px;font-size:13px}
    .grid-cards{grid-template-columns:1fr;gap:18px}
    .section{padding:52px 0}
    .step-item{gap:14px;padding:16px}
    .cta-actions .btn-primary-custom,.cta-actions .btn-ghost{width:100%;justify-content:center}
}
@media (max-width:520px){
    .container{padding-left:16px;padding-right:16px}
    .navbar-brand{font-size:16.5px}
    .brand-mark{width:32px;height:32px;flex:0 0 32px;font-size:15px;border-radius:10px}
    .btn-primary-custom{padding:9px 15px;font-size:14px}
    .btn-search{width:34px;height:34px}
    .article-card{border-radius:var(--radius)}
    .article-body h2{font-size:19px;padding-left:12px;border-left-width:4px}
    .step-num{flex:0 0 34px;width:34px;height:34px;font-size:13.5px}
}

/* roulang page: category4 */
:root{
  --brand:#2E5BFF;
  --brand-dark:#1B3ED8;
  --brand-soft:rgba(46,91,255,.10);
  --accent:#12C48B;
  --accent-soft:rgba(18,196,139,.14);
  --warn:#F5A524;
  --ink:#0E1526;
  --ink-2:#1C2436;
  --muted:#63718A;
  --muted-2:#8895AB;
  --bg:#F4F6FB;
  --surface:#FFFFFF;
  --line:#E4E9F2;
  --night:#0A1120;
  --night-2:#111B2E;
  --radius-xs:8px;
  --radius-sm:12px;
  --radius:18px;
  --radius-lg:26px;
  --shadow-xs:0 1px 3px rgba(15,23,42,.06);
  --shadow-sm:0 4px 14px rgba(15,23,42,.07);
  --shadow:0 14px 38px rgba(15,23,42,.10);
  --shadow-lg:0 28px 70px rgba(15,23,42,.18);
  --header-h:74px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand-dark)}
button,input,select,textarea{font-family:inherit;font-size:inherit}
h1,h2,h3,h4,h5{font-weight:800;color:var(--ink);line-height:1.3;margin:0 0 .6em}
p{margin:0 0 1em}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:3px solid rgba(46,91,255,.45);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;padding-left:20px;padding-right:20px;margin:0 auto}
.section{padding:88px 0}
.section-sm{padding:64px 0}
.section-head{max-width:760px;margin:0 auto 52px;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.78rem;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--brand);
  background:var(--brand-soft);border-radius:999px;padding:7px 16px;margin-bottom:18px;
}
.section-head h2{font-size:clamp(1.55rem,3.2vw,2.2rem);margin-bottom:14px}
.section-head p{color:var(--muted);font-size:1.02rem;margin:0}
.text-muted-2{color:var(--muted)}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:linear-gradient(120deg,#0A1120 0%,#131F38 55%,#0A1120 100%);
  border-bottom:1px solid rgba(255,255,255,.07);
  box-shadow:0 8px 30px rgba(6,12,26,.35);
}
.site-header .navbar{padding:12px 0;min-height:var(--header-h)}
.navbar-brand{
  display:flex;align-items:center;gap:10px;
  color:#fff !important;font-weight:800;font-size:1.06rem;letter-spacing:.02em;
  white-space:nowrap;
}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--brand),#5E8BFF);
  color:#fff;font-weight:900;font-size:1.1rem;
  box-shadow:0 8px 20px rgba(46,91,255,.45);
}
.navbar-brand:hover .brand-mark{transform:translateY(-1px)}
.brand-mark{transition:transform .22s ease}
.site-header .navbar-toggler{color:#fff;padding:6px 10px;box-shadow:none}
.site-header .navbar-toggler i{font-size:1.15rem}
.site-header .nav-link{
  color:rgba(255,255,255,.72);
  font-weight:600;font-size:.95rem;
  padding:9px 14px !important;border-radius:999px;
  transition:color .2s ease,background .2s ease;
}
.site-header .nav-link:hover{color:#fff;background:rgba(255,255,255,.08)}
.site-header .nav-link.active{
  color:#fff;background:rgba(46,91,255,.24);
  box-shadow:inset 0 0 0 1px rgba(94,139,255,.55);
}
.nav-right{display:flex;align-items:center;gap:10px}
.btn-search{
  width:40px;height:40px;border-radius:12px;
  border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.06);
  color:rgba(255,255,255,.85);display:inline-flex;align-items:center;justify-content:center;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.btn-search:hover{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.3)}
.btn-login{
  color:rgba(255,255,255,.82);font-weight:600;font-size:.95rem;padding:9px 14px;border-radius:999px;
  transition:color .2s ease,background .2s ease;
}
.btn-login:hover{color:#fff;background:rgba(255,255,255,.08)}
.btn-primary-custom{
  display:inline-flex;align-items:center;gap:8px;
  background:linear-gradient(135deg,var(--brand),#5E8BFF);
  color:#fff;font-weight:700;font-size:.95rem;
  padding:11px 22px;border-radius:999px;
  box-shadow:0 10px 26px rgba(46,91,255,.42);
  border:0;transition:transform .2s ease,box-shadow .2s ease,filter .2s ease;
}
.btn-primary-custom:hover{color:#fff;transform:translateY(-2px);box-shadow:0 16px 34px rgba(46,91,255,.5);filter:saturate(1.1)}
.btn-primary-custom:active{transform:translateY(0)}

/* ---------- Buttons ---------- */
.btn-solid,.btn-ghost,.btn-line{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-weight:700;border-radius:999px;padding:14px 30px;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn-solid{background:linear-gradient(135deg,var(--brand),#5E8BFF);color:#fff;border:0;box-shadow:0 14px 32px rgba(46,91,255,.35)}
.btn-solid:hover{color:#fff;transform:translateY(-2px);box-shadow:0 20px 42px rgba(46,91,255,.45)}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.24)}
.btn-ghost:hover{color:#fff;background:rgba(255,255,255,.16);transform:translateY(-2px)}
.btn-line{background:#fff;color:var(--ink);border:1px solid var(--line);box-shadow:var(--shadow-xs)}
.btn-line:hover{color:var(--brand);border-color:rgba(46,91,255,.4);transform:translateY(-2px);box-shadow:var(--shadow-sm)}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(900px 420px at 82% 12%,rgba(46,91,255,.35),transparent 62%),
    radial-gradient(620px 340px at 8% 88%,rgba(18,196,139,.18),transparent 60%),
    linear-gradient(165deg,#0A1120 0%,#101A2E 48%,#0A1120 100%);
  color:#fff;padding:84px 0 96px;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:52px 52px;mask-image:radial-gradient(80% 70% at 50% 30%,#000,transparent 78%);
}
.hero .container{position:relative;z-index:2}
.crumb{font-size:.86rem;color:rgba(255,255,255,.6);margin-bottom:20px}
.crumb a{color:rgba(255,255,255,.75)}
.crumb a:hover{color:#fff}
.crumb i{margin:0 8px;font-size:.7rem;opacity:.6}
.hero-badge{
  display:inline-flex;align-items:center;gap:9px;
  background:rgba(18,196,139,.16);color:#6FF0C5;
  border:1px solid rgba(18,196,139,.38);
  font-size:.83rem;font-weight:700;border-radius:999px;padding:8px 17px;margin-bottom:22px;
}
.hero h1{
  color:#fff;font-size:clamp(1.85rem,4.1vw,3rem);line-height:1.24;letter-spacing:-.01em;margin-bottom:20px;
}
.hero h1 em{font-style:normal;color:#7FA6FF}
.hero-lead{color:rgba(255,255,255,.76);font-size:1.06rem;max-width:600px;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:36px}
.hero-points{display:flex;flex-wrap:wrap;gap:12px 26px;font-size:.93rem;color:rgba(255,255,255,.72)}
.hero-points li{display:flex;align-items:center;gap:9px}
.hero-points i{color:var(--accent)}
.hero-panel{
  background:rgba(255,255,255,.055);
  border:1px solid rgba(255,255,255,.13);
  border-radius:var(--radius-lg);
  padding:18px;box-shadow:var(--shadow-lg);
  backdrop-filter:blur(8px);
}
.hero-shot{border-radius:var(--radius);overflow:hidden;position:relative}
.hero-shot img{width:100%;height:280px;object-fit:cover}
.hero-shot::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,17,32,0) 40%,rgba(10,17,32,.62))}
.shot-tag{
  position:absolute;left:16px;bottom:16px;z-index:2;
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(10,17,32,.72);border:1px solid rgba(255,255,255,.2);
  color:#fff;font-size:.82rem;font-weight:600;border-radius:999px;padding:7px 14px;
}
.mini-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:16px}
.mini-stat{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);
  border-radius:var(--radius-sm);padding:14px 12px;text-align:center;
}
.mini-stat strong{display:block;font-size:1.32rem;color:#fff;font-weight:800;letter-spacing:-.01em}
.mini-stat span{font-size:.78rem;color:rgba(255,255,255,.62)}
.mini-stat.is-accent strong{color:#6FF0C5}

/* ---------- Cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 26px;box-shadow:var(--shadow-xs);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  height:100%;
}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:rgba(46,91,255,.28)}
.card h3{font-size:1.12rem;margin-bottom:12px}
.card p{color:var(--muted);font-size:.95rem;margin-bottom:0}
.card-icon{
  width:50px;height:50px;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand);font-size:1.15rem;margin-bottom:18px;
}
.card-icon.green{background:var(--accent-soft);color:#0E9C70}
.card-icon.amber{background:rgba(245,165,36,.14);color:#C4820A}
.card-tag{
  display:inline-block;font-size:.74rem;font-weight:700;letter-spacing:.06em;
  color:var(--brand);background:var(--brand-soft);border-radius:999px;padding:5px 12px;margin-bottom:14px;
}
.card-tag.green{color:#0E9C70;background:var(--accent-soft)}
.card-tag.amber{color:#C4820A;background:rgba(245,165,36,.14)}
.metric-value{font-size:2rem;font-weight:800;letter-spacing:-.02em;color:var(--ink);margin-bottom:6px}
.metric-value small{font-size:.85rem;font-weight:600;color:var(--muted);margin-left:4px}

/* ---------- Feature split ---------- */
.split{
  display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;
}
.split h2{font-size:clamp(1.5rem,3vw,2.05rem);margin-bottom:16px}
.split p{color:var(--muted)}
.split-media{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);position:relative}
.split-media img{width:100%;height:400px;object-fit:cover}
.split-media .float-card{
  position:absolute;right:-6px;bottom:22px;
  background:#fff;border-radius:var(--radius-sm);padding:16px 20px;
  box-shadow:var(--shadow);border:1px solid var(--line);min-width:196px;
}
.float-card span{font-size:.78rem;color:var(--muted);display:block}
.float-card strong{font-size:1.3rem;font-weight:800;color:var(--ink);display:block}
.check-list{margin-top:22px}
.check-list li{display:flex;gap:12px;align-items:flex-start;padding:9px 0;color:var(--ink-2);font-size:.97rem}
.check-list i{color:var(--accent);margin-top:6px}

/* ---------- Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;position:relative}
.step{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 22px;position:relative;box-shadow:var(--shadow-xs);
  transition:transform .25s ease,box-shadow .25s ease;
}
.step:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.step-no{
  width:42px;height:42px;border-radius:13px;display:inline-flex;align-items:center;justify-content:center;
  font-weight:800;color:#fff;background:linear-gradient(135deg,var(--brand),#5E8BFF);
  box-shadow:0 10px 22px rgba(46,91,255,.32);margin-bottom:18px;
}
.step h3{font-size:1.04rem;margin-bottom:10px}
.step p{color:var(--muted);font-size:.93rem;margin-bottom:0}

/* ---------- Dark band ---------- */
.band{
  position:relative;color:#fff;overflow:hidden;
  background:linear-gradient(120deg,#0A1120 0%,#15213A 60%,#0A1120 100%);
}
.band::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;opacity:.22;
}
.band .container{position:relative;z-index:2}
.band h2{color:#fff}
.band p{color:rgba(255,255,255,.74)}
.band .section-head p{color:rgba(255,255,255,.72)}
.band .eyebrow{background:rgba(94,139,255,.18);color:#9DBAFF}
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.data-card{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.13);
  border-radius:var(--radius);padding:26px 22px;
  transition:background .25s ease,transform .25s ease,border-color .25s ease;
}
.data-card:hover{background:rgba(255,255,255,.1);transform:translateY(-4px);border-color:rgba(94,139,255,.5)}
.data-card strong{display:block;font-size:2.05rem;font-weight:800;letter-spacing:-.02em;color:#fff;margin-bottom:6px}
.data-card strong small{font-size:.9rem;font-weight:600;color:rgba(255,255,255,.6);margin-left:3px}
.data-card span{font-size:.9rem;color:rgba(255,255,255,.66)}
.data-note{margin-top:28px;font-size:.86rem;color:rgba(255,255,255,.55);text-align:center}

/* ---------- Scenario cards ---------- */
.scene-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow-xs);height:100%;
  transition:transform .25s ease,box-shadow .25s ease;
}
.scene-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.scene-card img{width:100%;height:186px;object-fit:cover}
.scene-body{padding:24px}
.scene-body h3{font-size:1.08rem;margin-bottom:10px}
.scene-body p{color:var(--muted);font-size:.94rem;margin-bottom:14px}
.chip-row{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  font-size:.78rem;font-weight:600;color:var(--muted);
  background:#F1F4FA;border:1px solid var(--line);border-radius:999px;padding:5px 12px;
}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;margin:0 auto}
.accordion-item{
  border:1px solid var(--line) !important;border-radius:var(--radius) !important;
  overflow:hidden;margin-bottom:14px;background:#fff;box-shadow:var(--shadow-xs);
}
.accordion-button{
  font-weight:700;font-size:1.01rem;color:var(--ink);background:#fff;
  padding:20px 24px;box-shadow:none !important;
}
.accordion-button:not(.collapsed){color:var(--brand-dark);background:var(--brand-soft)}
.accordion-button::after{
  background-image:none;content:"\f107";font-family:"Font Awesome 6 Free";font-weight:900;
  width:auto;height:auto;font-size:.95rem;color:var(--muted);transition:transform .25s ease;
}
.accordion-button:not(.collapsed)::after{transform:rotate(180deg);color:var(--brand)}
.accordion-body{padding:4px 24px 24px;color:var(--muted);font-size:.96rem;background:#fff}

/* ---------- CTA ---------- */
.cta-band{
  border-radius:var(--radius-lg);padding:56px 48px;
  background:linear-gradient(135deg,#1B3ED8,#2E5BFF 46%,#4F7BFF 100%);
  color:#fff;box-shadow:0 30px 70px rgba(27,62,216,.35);
  display:grid;grid-template-columns:1.4fr .6fr;gap:34px;align-items:center;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-70px;top:-70px;width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.28),transparent 68%);
}
.cta-band h2{color:#fff;font-size:clamp(1.4rem,2.7vw,1.9rem);margin-bottom:12px}
.cta-band p{color:rgba(255,255,255,.85);margin-bottom:0;position:relative;z-index:2}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;position:relative;z-index:2}
.cta-actions .btn-line{background:#fff;color:var(--brand-dark);border:0}
.cta-actions .btn-line:hover{color:var(--brand-dark);background:#EAF0FF}
.cta-actions .btn-ghost{border-color:rgba(255,255,255,.5)}

/* ---------- Footer ---------- */
.site-footer{
  background:linear-gradient(180deg,#101725,#0A1120);
  color:rgba(255,255,255,.72);padding:68px 0 32px;margin-top:96px;
  border-top:1px solid rgba(255,255,255,.07);
}
.foot-brand{font-size:1.16rem;font-weight:800;color:#fff;letter-spacing:.01em}
.site-footer p{color:rgba(255,255,255,.6)}
.foot-links{list-style:none;padding:0;margin:0}
.foot-links li{margin-bottom:11px}
.foot-links a{color:rgba(255,255,255,.66);font-size:.93rem}
.foot-links a:hover{color:#fff}
.site-footer .small{color:rgba(255,255,255,.55)}

/* ---------- Responsive ---------- */
@media (max-width:1024px){
  .section{padding:72px 0}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .data-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:34px}
  .split-media img{height:330px}
  .grid-3{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:991.98px){
  .site-header .navbar-collapse{
    background:rgba(255,255,255,.045);
    border:1px solid rgba(255,255,255,.1);
    border-radius:var(--radius);margin-top:14px;padding:14px;
  }
  .site-header .nav-link{padding:11px 14px !important;text-align:left}
  .navbar-collapse.justify-content-center{justify-content:flex-start !important}
  .hero{padding:60px 0 72px}
  .cta-band{grid-template-columns:1fr;padding:44px 30px}
}
@media (max-width:768px){
  .section{padding:58px 0}
  .section-head{margin-bottom:38px}
  .grid-3,.grid-4,.grid-2,.steps,.mini-stats{grid-template-columns:1fr}
  .mini-stats{grid-template-columns:repeat(3,1fr)}
  .hero-shot img{height:220px}
  .split-media img{height:250px}
  .split-media .float-card{right:14px;bottom:14px}
  .data-grid{grid-template-columns:1fr}
  .btn-search,.btn-login{display:none}
  .btn-primary-custom{padding:10px 16px;font-size:.9rem}
}
@media (max-width:520px){
  .container{padding-left:16px;padding-right:16px}
  .hero{padding:48px 0 60px}
  .hero h1{font-size:1.62rem}
  .hero-lead{font-size:.98rem}
  .hero-actions{gap:10px}
  .btn-solid,.btn-ghost,.btn-line{padding:12px 22px;width:100%}
  .mini-stats{grid-template-columns:1fr}
  .card{padding:24px 20px}
  .step{padding:24px 20px}
  .accordion-button{padding:16px 18px;font-size:.95rem}
  .cta-band{padding:34px 22px;border-radius:var(--radius)}
  .navbar-brand span:last-child{font-size:.98rem}
  .site-footer{padding:52px 0 26px}
}