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<style>
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --navy:#0B1437;--blue:#1E3A8A;--accent:#3B82F6;--accent2:#60A5FA;
  --gold:#F59E0B;--surface:#F8FAFF;--surface2:#EEF2FF;
  --text:#0F172A;--muted:#64748B;--border:#E2E8F0;
  --white:#FFFFFF;--green:#10B981;--red:#EF4444;--sidebar-w:260px;
}
html,body{height:100%;font-family:'Be Vietnam Pro',sans-serif;background:var(--surface);color:var(--text)}
a{text-decoration:none;color:inherit}

.layout{display:flex;height:100vh;overflow:hidden}
.main{flex:1;display:flex;flex-direction:column;min-width:0;overflow-y:auto;overflow-x:hidden;scrollbar-width:thin;scrollbar-color:var(--border) transparent;-webkit-overflow-scrolling:touch}
/* ── SIDEBAR ── */
.sidebar{width:var(--sidebar-w);background:var(--navy);display:flex;flex-direction:column;flex-shrink:0;height:100vh;position:sticky;top:0;z-index:100;transition:transform .3s ease}
.sidebar-logo{padding:18px 16px 14px;border-bottom:1px solid rgba(255,255,255,0.08);flex-shrink:0}
.logo-mark{display:flex;align-items:center;gap:10px}
.logo-icon{width:34px;height:34px;background:linear-gradient(135deg,var(--accent),var(--gold));border-radius:9px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.logo-icon svg{width:18px;height:18px}
.logo-name{font-size:13px;font-weight:700;color:#fff;letter-spacing:.5px}
.logo-sub{font-size:9px;color:rgba(255,255,255,0.35);letter-spacing:.4px;margin-top:1px}
.sidebar-section{padding:12px 10px 4px}
.sidebar-label{font-size:9px;font-weight:700;color:rgba(255,255,255,0.25);letter-spacing:1.5px;text-transform:uppercase;padding:0 8px;margin-bottom:4px}

/* nav-item base */
.nav-item{display:flex;align-items:center;gap:9px;padding:8px 10px;border-radius:8px;cursor:pointer;transition:background .15s;margin-bottom:1px;border-left:2px solid transparent;color:inherit}
.nav-item:hover{background:rgba(255,255,255,0.07)}
.nav-item.active{background:linear-gradient(135deg,rgba(59,130,246,.22),rgba(59,130,246,.08));border-left-color:var(--accent)}
.nav-item i{width:15px;font-size:12px;flex-shrink:0;color:rgba(255,255,255,0.4)}
.nav-item.active i{color:var(--accent2)}
.nav-item span{font-size:12px;color:rgba(255,255,255,0.65);font-weight:400;flex:1}
.nav-item.active span{color:#fff;font-weight:500}
.badge{margin-left:auto;font-size:9px;font-weight:700;padding:2px 7px;border-radius:99px;color:#fff}
.badge.hot{background:var(--red)}
.badge.sale{background:var(--green)}
.badge.new{background:var(--gold);color:#1a1a1a}

/* ── SUBMENU ── */
.nav-group{margin-bottom:1px}
.nav-group-toggle{margin-bottom:0}
.nav-arrow{margin-left:auto!important;transition:transform .25s;font-size:10px!important;color:rgba(255,255,255,0.3)!important}
.nav-submenu{max-height:0;overflow:hidden;transition:max-height .28s ease;padding-left:22px}
.nav-sub-item{display:flex;align-items:center;gap:8px;padding:7px 10px 7px 12px;border-radius:7px;cursor:pointer;transition:background .15s;margin-bottom:1px;position:relative;color:inherit}
.nav-sub-item::before{content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);width:5px;height:5px;border-radius:50%;background:rgba(255,255,255,0.2)}
.nav-sub-item:hover{background:rgba(255,255,255,0.06)}
.nav-sub-item.active{background:rgba(59,130,246,0.15)}
.nav-sub-item.active::before{background:var(--accent2)}
.nav-sub-item span{font-size:11.5px;color:rgba(255,255,255,0.58);line-height:1.35}
.nav-sub-item.active span{color:rgba(255,255,255,0.9);font-weight:500}
/* open state */
.nav-group.sub-open>.nav-group-toggle .nav-arrow{transform:rotate(180deg)}
.nav-group.sub-open>.nav-submenu{max-height:400px}

/* ── TOPBAR ── */
.topbar{background:var(--white);border-bottom:1px solid var(--border);padding:0 20px;height:56px;display:flex;align-items:center;justify-content:space-between;flex-shrink:0;z-index:50;gap:10px;position:sticky;top:0;left:0;right:0;box-shadow:0 2px 8px rgba(0,0,0,0.06);touch-action:none;user-select:none;-webkit-user-select:none}
.topbar-left{display:flex;align-items:center;gap:10px;min-width:0}
.hamburger{display:none;flex-direction:column;justify-content:center;align-items:center;width:34px;height:34px;cursor:pointer;border-radius:8px;border:1px solid var(--border);background:transparent;gap:4px;flex-shrink:0}
.hamburger span{display:block;width:17px;height:2px;background:var(--text);border-radius:2px;transition:all .3s}
.hamburger.open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0;transform:scaleX(0)}
.hamburger.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.topbar-info{min-width:0}
.topbar-title{font-size:14px;font-weight:600;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-sub{font-size:10.5px;color:var(--muted)}
.topbar-right{display:flex;align-items:center;gap:9px;flex-shrink:0}
.time-pill{background:var(--surface2);border:1px solid var(--border);border-radius:99px;padding:5px 12px;font-size:11px;font-weight:500;color:var(--blue);white-space:nowrap}
.attend-btn{background:linear-gradient(135deg,var(--accent),#2563EB);color:#fff;border:none;border-radius:8px;padding:7px 13px;font-size:11.5px;font-weight:600;cursor:pointer;font-family:inherit;transition:opacity .2s;white-space:nowrap}
.attend-btn:hover{opacity:.88}
.attend-btn:disabled{opacity:.7;cursor:default}
.topbar-avatar{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--gold));display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:#fff;flex-shrink:0}

/* ── CONTENT ── */
.content{flex:1;padding:20px 20px 40px}
.main::-webkit-scrollbar{width:4px}
.main::-webkit-scrollbar-thumb{background:var(--border);border-radius:99px}
/* ── CARDS ── */
.card{background:var(--white);border:1px solid var(--border);border-radius:13px;overflow:hidden;transition:box-shadow .2s}
.card:hover{box-shadow:0 4px 18px rgba(0,0,0,0.06)}
.card-head{padding:15px 18px 11px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border)}
.card-head-title{font-size:13px;font-weight:600;color:var(--text)}
.card-head-right{font-size:11px;color:var(--accent);font-weight:600;cursor:pointer}
.card-body-pad{padding:16px 18px}

/* ── PAGE HEADER ── */
.page-header{margin-bottom:18px}
.page-title{font-size:17px;font-weight:700;color:var(--text);margin-bottom:3px}
.page-breadcrumb{font-size:11.5px;color:var(--muted)}
.page-breadcrumb a{color:var(--accent)}

/* ── NOTICE BANNER ── */
.notice-banner{background:linear-gradient(135deg,#EFF6FF,#DBEAFE);border:1px solid #BFDBFE;border-radius:11px;padding:12px 16px;display:flex;align-items:center;gap:11px;margin-bottom:20px}
.notice-icon{width:30px;height:30px;background:#DBEAFE;border-radius:8px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.notice-text{font-size:12px;color:#1E40AF;line-height:1.6}
.notice-text strong{font-weight:600}
.notice-link{color:var(--accent);font-weight:600}

/* ── STATS ── */
.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:13px;margin-bottom:20px}
.stat-card{background:var(--white);border:1px solid var(--border);border-radius:11px;padding:14px 15px;display:flex;align-items:center;gap:11px;transition:box-shadow .2s}
.stat-card:hover{box-shadow:0 4px 16px rgba(0,0,0,0.07)}
.stat-ico{width:38px;height:38px;border-radius:9px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.stat-ico i{font-size:15px}
.stat-label{font-size:10px;color:var(--muted);margin-bottom:2px}
.stat-val{font-size:18px;font-weight:700;color:var(--text);line-height:1}
.stat-delta{font-size:10px;color:var(--green);font-weight:500;margin-top:2px}

/* ── TABLE ── */
.dvc-table{width:100%;border-collapse:collapse;font-size:12.5px}
.dvc-table thead th{background:var(--surface2);color:var(--text);font-weight:600;padding:9px 13px;text-align:left;font-size:11px;border-bottom:1px solid var(--border)}
.dvc-table tbody td{padding:10px 13px;border-bottom:1px solid var(--border);color:var(--text);vertical-align:middle}
.dvc-table tbody tr:hover{background:var(--surface)}
.dvc-table tbody tr:last-child td{border-bottom:none}
/* ── AJAX PARTIAL TABLE COMPAT (Bootstrap legacy) ── */
.table{width:100%;border-collapse:collapse;font-size:12.5px;margin:0;min-width:0}
.table thead th,.table th{background:var(--surface2)!important;color:var(--text)!important;font-weight:600;padding:9px 13px!important;text-align:left;font-size:11px;border-bottom:1px solid var(--border)!important;border-top:none!important;border-left:none!important;border-right:none!important;white-space:nowrap}
.table tbody td,.table td{padding:9px 13px!important;border-bottom:1px solid var(--border)!important;color:var(--text);vertical-align:middle;border-top:none!important;border-left:none!important;border-right:none!important}
.table-bordered td,.table-bordered th{border:none!important;border-bottom:1px solid var(--border)!important}
.table-striped tbody tr:nth-of-type(odd){background:var(--surface)!important}
.table-hover tbody tr:hover{background:var(--surface2)!important}
.table-responsive{overflow-x:auto;-webkit-overflow-scrolling:touch;width:100%}
/* Badge/status compat */
.badge.bg-success,.badge-success{background:var(--green)!important;color:#fff!important;padding:3px 9px;border-radius:6px;font-size:11px;font-weight:700;display:inline-block}
.badge.bg-danger,.badge-danger{background:var(--red)!important;color:#fff!important;padding:3px 9px;border-radius:6px;font-size:11px;font-weight:700;display:inline-block}
.badge.bg-warning,.badge-warning{background:var(--gold)!important;color:#fff!important;padding:3px 9px;border-radius:6px;font-size:11px;font-weight:700;display:inline-block}
.badge.bg-info,.badge-info{background:var(--accent)!important;color:#fff!important;padding:3px 9px;border-radius:6px;font-size:11px;font-weight:700;display:inline-block}
.badge.bg-secondary,.badge-secondary{background:var(--muted)!important;color:#fff!important;padding:3px 9px;border-radius:6px;font-size:11px;font-weight:700;display:inline-block}
.badge.bg-primary,.badge-primary{background:var(--blue)!important;color:#fff!important;padding:3px 9px;border-radius:6px;font-size:11px;font-weight:700;display:inline-block}
/* Partial wrapper reset — bọc sạch không margin/padding thừa */
.list{width:100%;overflow-x:auto}
.list table{width:100%!important;min-width:0!important}
.list .container,.list .bg-light,.list .bg-table{max-width:100%!important;padding:0!important;margin:0!important;background:transparent!important}
.list .py-5{padding-top:0!important;padding-bottom:0!important}
.bg-light{background:transparent!important}
.bg-table{background:transparent!important}
.py-5{padding-top:0!important;padding-bottom:0!important}
.container{max-width:100%!important;padding:0!important}
/* Fit bảng vào card không overflow */
#historyContainer table,
#hostList table,
#vpsList table,
#mienList table{width:100%!important;table-layout:auto}
/* ── FORMS ── */
.form-group{margin-bottom:14px}
.form-label{display:block;font-size:11.5px;font-weight:600;color:var(--text);margin-bottom:5px}
.form-control{width:100%;padding:8px 12px;border:1.5px solid var(--border);border-radius:8px;font-size:13px;font-family:inherit;color:var(--text);background:var(--white);outline:none;transition:border-color .2s,box-shadow .2s}
.form-control:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(59,130,246,.1)}
.form-control::placeholder{color:#94A3B8}
select.form-control{cursor:pointer}
textarea.form-control{resize:vertical;min-height:90px}

/* ── BUTTONS ── */
.btn{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border-radius:8px;font-size:12px;font-weight:600;cursor:pointer;font-family:inherit;border:none;transition:all .18s;text-decoration:none}
.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:#2563EB}
.btn-success{background:var(--green);color:#fff}.btn-success:hover{background:#059669}
.btn-danger{background:var(--red);color:#fff}.btn-danger:hover{background:#DC2626}
.btn-dark{background:var(--navy);color:#fff}.btn-dark:hover{background:var(--blue)}
.btn-secondary{background:var(--border);color:var(--text)}.btn-secondary:hover{background:#CBD5E1}
.btn-warning{background:var(--gold);color:#fff}.btn-warning:hover{background:#D97706}
.btn-info{background:#06B6D4;color:#fff}.btn-info:hover{background:#0891B2}
.btn-sm{padding:5px 10px;font-size:11px;border-radius:6px}
.btn-lg{padding:10px 20px;font-size:14px}
.btn-block{width:100%;justify-content:center}

/* ── ALERTS ── */
.alert{padding:11px 15px;border-radius:9px;font-size:12.5px;margin-bottom:14px;border:1px solid transparent;display:flex;align-items:flex-start;gap:9px}
.alert-success{background:#F0FDF4;border-color:#BBF7D0;color:#166534}
.alert-danger{background:#FFF1F2;border-color:#FECDD3;color:#9F1239}
.alert-info{background:#EFF6FF;border-color:#BFDBFE;color:#1E40AF}
.alert-warning{background:#FFFBEB;border-color:#FDE68A;color:#92400E}

/* ── PILLS ── */
.pill{display:inline-block;padding:3px 10px;border-radius:99px;font-size:11px;font-weight:600}
.pill-success{background:#DCFCE7;color:#166534}
.pill-danger{background:#FFE4E6;color:#9F1239}
.pill-info{background:#DBEAFE;color:#1E40AF}
.pill-warning{background:#FEF3C7;color:#92400E}
.pill-gray{background:var(--surface2);color:var(--muted)}

/* ── PLAN CARDS (dùng cho dshost/dsvps) ── */
.plan-tabs{display:flex;gap:4px;background:var(--surface2);padding:4px;border-radius:10px;margin-bottom:20px;width:fit-content;flex-wrap:wrap}
.plan-tab{padding:7px 15px;border-radius:7px;font-size:12px;font-weight:600;cursor:pointer;border:none;background:transparent;color:var(--muted);font-family:inherit;transition:all .2s}
.plan-tab.active{background:var(--white);color:var(--blue);box-shadow:0 1px 5px rgba(0,0,0,0.1)}
.plan-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.plan-card{background:var(--white);border:1.5px solid var(--border);border-radius:13px;overflow:hidden;transition:all .2s;display:flex;flex-direction:column}
.plan-card:hover{box-shadow:0 6px 24px rgba(0,0,0,0.1);transform:translateY(-2px);border-color:var(--accent)}
.plan-card-head{padding:18px 18px 14px;border-bottom:1px solid var(--border);text-align:center}
.plan-name{font-size:14px;font-weight:700;color:var(--text);margin-bottom:5px}
.plan-price{font-size:20px;font-weight:800;color:var(--accent)}
.plan-price span{font-size:11px;font-weight:500;color:var(--muted)}
.plan-body{padding:14px 18px;flex:1}
.plan-feature{display:flex;align-items:center;gap:9px;padding:6px 0;border-bottom:1px solid var(--surface2);font-size:12px;color:var(--text)}
.plan-feature:last-child{border-bottom:none}
.plan-feature i{color:var(--green);width:13px;flex-shrink:0;font-size:11px}
.plan-footer{padding:14px 18px;border-top:1px solid var(--border)}
.tab-pane{display:none}.tab-pane.active{display:block}

/* ── FOOTER ── */
.site-footer{background:var(--white);border-top:1px solid var(--border);padding:12px 20px;display:flex;align-items:center;justify-content:space-between;flex-shrink:0}
.footer-left{font-size:11px;color:var(--muted)}
.footer-right{display:flex;gap:12px}
.footer-right a{font-size:11px;color:var(--muted);transition:color .15s}
.footer-right a:hover{color:var(--accent)}

/* ── OVERLAY ── */
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.5);z-index:90}
.sidebar-overlay.active{display:block}

/* ── RESPONSIVE ── */
@media(max-width:1024px){.stats-row{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){
  .sidebar{position:fixed;left:0;top:0;height:100%;transform:translateX(-100%);z-index:100}
  .sidebar.open{transform:translateX(0)}
  .hamburger{display:flex}
  .time-pill{display:none}
  
  /* Sửa lại Topbar ghim cố định */
  .topbar{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
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    <!-- CẤU HÌNH -->
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        <!-- THỜI GIAN -->
        <div class="card">
            <div class="card-head">
                <div class="card-head-title"><i class="fa-solid fa-clock" style="color:var(--accent)"></i> Thời Gian Sử Dụng</div>
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                                    <div style="display:grid;grid-template-columns:repeat(auto-fill,minmax(115px,1fr));gap:10px">
                                                    <div class="vps-time-opt" data-duration="sevenday" data-price="300600" data-cycle="7 Ngày" onclick="if (!window.__cfRLUnblockHandlers) return false; selectTime(this)" style="border:1.5px solid var(--accent);background:#EFF6FF;border-radius:10px;padding:12px 10px;text-align:center;cursor:pointer;transition:all .18s" data-cf-modified-de9f14f02c53e42233772be4-="">
                                <div style="font-size:12.5px;font-weight:700;color:var(--text)">7 Ngày</div>
                                <div style="font-size:14px;font-weight:800;color:var(--accent);margin-top:4px">300,600đ</div>
                            </div>
                                                    <div class="vps-time-opt" data-duration="fifteenday" data-price="561000" data-cycle="15 Ngày" onclick="if (!window.__cfRLUnblockHandlers) return false; selectTime(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:10px;padding:12px 10px;text-align:center;cursor:pointer;transition:all .18s" data-cf-modified-de9f14f02c53e42233772be4-="">
                                <div style="font-size:12.5px;font-weight:700;color:var(--text)">15 Ngày</div>
                                <div style="font-size:14px;font-weight:800;color:var(--accent);margin-top:4px">561,000đ</div>
                            </div>
                                                    <div class="vps-time-opt" data-duration="monthly" data-price="880000" data-cycle="1 Tháng" onclick="if (!window.__cfRLUnblockHandlers) return false; selectTime(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:10px;padding:12px 10px;text-align:center;cursor:pointer;transition:all .18s" data-cf-modified-de9f14f02c53e42233772be4-="">
                                <div style="font-size:12.5px;font-weight:700;color:var(--text)">1 Tháng</div>
                                <div style="font-size:14px;font-weight:800;color:var(--accent);margin-top:4px">880,000đ</div>
                            </div>
                                                    <div class="vps-time-opt" data-duration="quarterly" data-price="2413950" data-cycle="3 Tháng" onclick="if (!window.__cfRLUnblockHandlers) return false; selectTime(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:10px;padding:12px 10px;text-align:center;cursor:pointer;transition:all .18s" data-cf-modified-de9f14f02c53e42233772be4-="">
                                <div style="font-size:12.5px;font-weight:700;color:var(--text)">3 Tháng</div>
                                <div style="font-size:14px;font-weight:800;color:var(--accent);margin-top:4px">2,413,950đ</div>
                            </div>
                                                    <div class="vps-time-opt" data-duration="semiannually" data-price="4455000" data-cycle="6 Tháng" onclick="if (!window.__cfRLUnblockHandlers) return false; selectTime(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:10px;padding:12px 10px;text-align:center;cursor:pointer;transition:all .18s" data-cf-modified-de9f14f02c53e42233772be4-="">
                                <div style="font-size:12.5px;font-weight:700;color:var(--text)">6 Tháng</div>
                                <div style="font-size:14px;font-weight:800;color:var(--accent);margin-top:4px">4,455,000đ</div>
                            </div>
                                                    <div class="vps-time-opt" data-duration="annually" data-price="8078400" data-cycle="1 Năm" onclick="if (!window.__cfRLUnblockHandlers) return false; selectTime(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:10px;padding:12px 10px;text-align:center;cursor:pointer;transition:all .18s" data-cf-modified-de9f14f02c53e42233772be4-="">
                                <div style="font-size:12.5px;font-weight:700;color:var(--text)">1 Năm</div>
                                <div style="font-size:14px;font-weight:800;color:var(--accent);margin-top:4px">8,078,400đ</div>
                            </div>
                                                    <div class="vps-time-opt" data-duration="biennially" data-price="14784000" data-cycle="2 Năm" onclick="if (!window.__cfRLUnblockHandlers) return false; selectTime(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:10px;padding:12px 10px;text-align:center;cursor:pointer;transition:all .18s" data-cf-modified-de9f14f02c53e42233772be4-="">
                                <div style="font-size:12.5px;font-weight:700;color:var(--text)">2 Năm</div>
                                <div style="font-size:14px;font-weight:800;color:var(--accent);margin-top:4px">14,784,000đ</div>
                            </div>
                                                    <div class="vps-time-opt" data-duration="triennially" data-price="20790000" data-cycle="3 Năm" onclick="if (!window.__cfRLUnblockHandlers) return false; selectTime(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:10px;padding:12px 10px;text-align:center;cursor:pointer;transition:all .18s" data-cf-modified-de9f14f02c53e42233772be4-="">
                                <div style="font-size:12.5px;font-weight:700;color:var(--text)">3 Năm</div>
                                <div style="font-size:14px;font-weight:800;color:var(--accent);margin-top:4px">20,790,000đ</div>
                            </div>
                                            </div>
                            </div>
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        <div class="card">
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                <div class="card-head-title"><i class="fa-solid fa-plus-circle" style="color:var(--purple)"></i> Mua thêm</div>
                <span class="badge bg-purple" style="background:#7C3AED;color:#fff;padding:4px 8px;border-radius:6px;font-size:11px">Addon</span>
            </div>
            <div class="card-body-pad">
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                    <div>
                        <label style="font-size:12px;font-weight:600;display:block;margin-bottom:5px">Ram (GB) — <span id="addonPriceLabel_ram">4,900</span>đ</label>
                        <div style="display:flex;align-items:center;background:var(--surface2);border-radius:8px;padding:2px">
                            <input type="number" id="addon_ram" value="0" min="0" oninput="if (!window.__cfRLUnblockHandlers) return false; calcTotal()" style="width:100%;background:none;border:none;text-align:center;font-weight:700;padding:8px" data-cf-modified-de9f14f02c53e42233772be4-="">
                            <div style="display:flex;flex-direction:column;gap:2px;padding-right:5px">
                                <button onclick="if (!window.__cfRLUnblockHandlers) return false; changeAddon('addon_ram',1)" style="border:none;background:var(--white);border-radius:4px;cursor:pointer;font-size:10px;width:20px;height:16px" data-cf-modified-de9f14f02c53e42233772be4-="">+</button>
                                <button onclick="if (!window.__cfRLUnblockHandlers) return false; changeAddon('addon_ram',-1)" style="border:none;background:var(--white);border-radius:4px;cursor:pointer;font-size:10px;width:20px;height:16px" data-cf-modified-de9f14f02c53e42233772be4-="">-</button>
                            </div>
                        </div>
                    </div>
                    <div>
                        <label style="font-size:12px;font-weight:600;display:block;margin-bottom:5px">CPU (Core) — <span id="addonPriceLabel_cpu">5,880</span>đ</label>
                        <div style="display:flex;align-items:center;background:var(--surface2);border-radius:8px;padding:2px">
                            <input type="number" id="addon_cpu" value="0" min="0" oninput="if (!window.__cfRLUnblockHandlers) return false; calcTotal()" style="width:100%;background:none;border:none;text-align:center;font-weight:700;padding:8px" data-cf-modified-de9f14f02c53e42233772be4-="">
                            <div style="display:flex;flex-direction:column;gap:2px;padding-right:5px">
                                <button onclick="if (!window.__cfRLUnblockHandlers) return false; changeAddon('addon_cpu',1)" style="border:none;background:var(--white);border-radius:4px;cursor:pointer;font-size:10px;width:20px;height:16px" data-cf-modified-de9f14f02c53e42233772be4-="">+</button>
                                <button onclick="if (!window.__cfRLUnblockHandlers) return false; changeAddon('addon_cpu',-1)" style="border:none;background:var(--white);border-radius:4px;cursor:pointer;font-size:10px;width:20px;height:16px" data-cf-modified-de9f14f02c53e42233772be4-="">-</button>
                            </div>
                        </div>
                    </div>
                    <div>
                        <label style="font-size:12px;font-weight:600;display:block;margin-bottom:5px">Disk (GB) — <span id="addonPriceLabel_disk">196</span>đ</label>
                        <div style="display:flex;align-items:center;background:var(--surface2);border-radius:8px;padding:2px">
                            <input type="number" id="addon_disk" value="0" min="0" oninput="if (!window.__cfRLUnblockHandlers) return false; calcTotal()" style="width:100%;background:none;border:none;text-align:center;font-weight:700;padding:8px" data-cf-modified-de9f14f02c53e42233772be4-="">
                            <div style="display:flex;flex-direction:column;gap:2px;padding-right:5px">
                                <button onclick="if (!window.__cfRLUnblockHandlers) return false; changeAddon('addon_disk',1)" style="border:none;background:var(--white);border-radius:4px;cursor:pointer;font-size:10px;width:20px;height:16px" data-cf-modified-de9f14f02c53e42233772be4-="">+</button>
                                <button onclick="if (!window.__cfRLUnblockHandlers) return false; changeAddon('addon_disk',-1)" style="border:none;background:var(--white);border-radius:4px;cursor:pointer;font-size:10px;width:20px;height:16px" data-cf-modified-de9f14f02c53e42233772be4-="">-</button>
                            </div>
                        </div>
                    </div>
                    <div>
                        <label style="font-size:12px;font-weight:600;display:block;margin-bottom:5px">IP — <span id="addonPriceLabel_ip">4,900</span>đ</label>
                        <div style="display:flex;align-items:center;background:var(--surface2);border-radius:8px;padding:2px">
                            <input type="number" id="addon_ip" value="0" min="0" oninput="if (!window.__cfRLUnblockHandlers) return false; calcTotal()" style="width:100%;background:none;border:none;text-align:center;font-weight:700;padding:8px" data-cf-modified-de9f14f02c53e42233772be4-="">
                            <div style="display:flex;flex-direction:column;gap:2px;padding-right:5px">
                                <button onclick="if (!window.__cfRLUnblockHandlers) return false; changeAddon('addon_ip',1)" style="border:none;background:var(--white);border-radius:4px;cursor:pointer;font-size:10px;width:20px;height:16px" data-cf-modified-de9f14f02c53e42233772be4-="">+</button>
                                <button onclick="if (!window.__cfRLUnblockHandlers) return false; changeAddon('addon_ip',-1)" style="border:none;background:var(--white);border-radius:4px;cursor:pointer;font-size:10px;width:20px;height:16px" data-cf-modified-de9f14f02c53e42233772be4-="">-</button>
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                        </div>
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                <!-- <div style="margin-top:12px;display:flex;align-items:center;gap:8px">
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           <label for="ipv6_subnet" style="font-size:12px;cursor:pointer">Kích hoạt IPv6 Subnet</label>
        </div> ---!>
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    <!-- HỆ ĐIỀU HÀNH -->
                <div class="card">
                    <div class="card-head">
                        <div class="card-head-title"><i class="fa-solid fa-hard-drive" style="color:var(--blue)"></i> Hệ Điều Hành : ( Cấu hình thấp thì không nên chọn hệ điều hành cao )</div>
                    </div>
                    <div class="card-body-pad">
                                                    <div style="display:grid;grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:12px;margin-bottom:15px">
                                                                    <div class="os-group-item" onclick="if (!window.__cfRLUnblockHandlers) return false; showOsVersions('almalinux', this)" style="border:1.5px solid var(--border);border-radius:10px;padding:12px;text-align:center;cursor:pointer;transition:0.2s;background:var(--white)" data-cf-modified-de9f14f02c53e42233772be4-="">
                                        <i class="fa-brands fa-linux" style="color:#005571;font-size:28px;display:block;margin-bottom:8px"></i>
                                        <span style="font-size:11px;font-weight:700;color:var(--text)">AlmaLinux</span>
                                    </div>
                                                                    <div class="os-group-item" onclick="if (!window.__cfRLUnblockHandlers) return false; showOsVersions('centos', this)" style="border:1.5px solid var(--border);border-radius:10px;padding:12px;text-align:center;cursor:pointer;transition:0.2s;background:var(--white)" data-cf-modified-de9f14f02c53e42233772be4-="">
                                        <i class="fa-brands fa-centos" style="color:#932279;font-size:28px;display:block;margin-bottom:8px"></i>
                                        <span style="font-size:11px;font-weight:700;color:var(--text)">CentOS</span>
                                    </div>
                                                                    <div class="os-group-item" onclick="if (!window.__cfRLUnblockHandlers) return false; showOsVersions('debian', this)" style="border:1.5px solid var(--border);border-radius:10px;padding:12px;text-align:center;cursor:pointer;transition:0.2s;background:var(--white)" data-cf-modified-de9f14f02c53e42233772be4-="">
                                        <i class="fa-brands fa-debian" style="color:#A80030;font-size:28px;display:block;margin-bottom:8px"></i>
                                        <span style="font-size:11px;font-weight:700;color:var(--text)">Debian</span>
                                    </div>
                                                                    <div class="os-group-item" onclick="if (!window.__cfRLUnblockHandlers) return false; showOsVersions('rocky', this)" style="border:1.5px solid var(--border);border-radius:10px;padding:12px;text-align:center;cursor:pointer;transition:0.2s;background:var(--white)" data-cf-modified-de9f14f02c53e42233772be4-="">
                                        <i class="fa-brands fa-linux" style="color:#10B981;font-size:28px;display:block;margin-bottom:8px"></i>
                                        <span style="font-size:11px;font-weight:700;color:var(--text)">Rocky</span>
                                    </div>
                                                                    <div class="os-group-item" onclick="if (!window.__cfRLUnblockHandlers) return false; showOsVersions('ubuntu', this)" style="border:1.5px solid var(--border);border-radius:10px;padding:12px;text-align:center;cursor:pointer;transition:0.2s;background:var(--white)" data-cf-modified-de9f14f02c53e42233772be4-="">
                                        <i class="fa-brands fa-ubuntu" style="color:#E95420;font-size:28px;display:block;margin-bottom:8px"></i>
                                        <span style="font-size:11px;font-weight:700;color:var(--text)">Ubuntu</span>
                                    </div>
                                                                    <div class="os-group-item" onclick="if (!window.__cfRLUnblockHandlers) return false; showOsVersions('windown-2012', this)" style="border:1.5px solid var(--border);border-radius:10px;padding:12px;text-align:center;cursor:pointer;transition:0.2s;background:var(--white)" data-cf-modified-de9f14f02c53e42233772be4-="">
                                        <i class="fa-brands fa-linux" style="color:#6B7280;font-size:28px;display:block;margin-bottom:8px"></i>
                                        <span style="font-size:11px;font-weight:700;color:var(--text)">Windown-2012</span>
                                    </div>
                                                                    <div class="os-group-item" onclick="if (!window.__cfRLUnblockHandlers) return false; showOsVersions('windows', this)" style="border:1.5px solid var(--border);border-radius:10px;padding:12px;text-align:center;cursor:pointer;transition:0.2s;background:var(--white)" data-cf-modified-de9f14f02c53e42233772be4-="">
                                        <i class="fa-brands fa-windows" style="color:#0078D4;font-size:28px;display:block;margin-bottom:8px"></i>
                                        <span style="font-size:11px;font-weight:700;color:var(--text)">Windows</span>
                                    </div>
                                                            </div>

                            <div id="version-selector" style="display:none;background:var(--surface2);padding:15px;border-radius:10px;border:1px dashed var(--border)">
                                <label style="font-size:12px;font-weight:700;margin-bottom:8px;display:block">Chọn phiên bản:</label>
                                                                    <div class="version-list" id="list-almalinux" style="display:none;grid-template-columns:1fr 1fr;gap:8px">
                                                                                    <div class="vps-os-opt" data-osid="1" onclick="if (!window.__cfRLUnblockHandlers) return false; selectOs(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:6px;padding:8px 12px;cursor:pointer;font-size:12px;font-weight:600" data-cf-modified-de9f14f02c53e42233772be4-="">
                                                AlmaLinux 8.4                                            </div>
                                                                                    <div class="vps-os-opt" data-osid="2" onclick="if (!window.__cfRLUnblockHandlers) return false; selectOs(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:6px;padding:8px 12px;cursor:pointer;font-size:12px;font-weight:600" data-cf-modified-de9f14f02c53e42233772be4-="">
                                                AlmaLinux 8.9                                            </div>
                                                                                    <div class="vps-os-opt" data-osid="3" onclick="if (!window.__cfRLUnblockHandlers) return false; selectOs(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:6px;padding:8px 12px;cursor:pointer;font-size:12px;font-weight:600" data-cf-modified-de9f14f02c53e42233772be4-="">
                                                AlmaLinux 9.2                                            </div>
                                                                            </div>
                                                                    <div class="version-list" id="list-centos" style="display:none;grid-template-columns:1fr 1fr;gap:8px">
                                                                                    <div class="vps-os-opt" data-osid="4" onclick="if (!window.__cfRLUnblockHandlers) return false; selectOs(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:6px;padding:8px 12px;cursor:pointer;font-size:12px;font-weight:600" data-cf-modified-de9f14f02c53e42233772be4-="">
                                                CentOS 7.9                                            </div>
                                                                                    <div class="vps-os-opt" data-osid="5" onclick="if (!window.__cfRLUnblockHandlers) return false; selectOs(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:6px;padding:8px 12px;cursor:pointer;font-size:12px;font-weight:600" data-cf-modified-de9f14f02c53e42233772be4-="">
                                                CentOS 8.2                                            </div>
                                                                            </div>
                                                                    <div class="version-list" id="list-debian" style="display:none;grid-template-columns:1fr 1fr;gap:8px">
                                                                                    <div class="vps-os-opt" data-osid="6" onclick="if (!window.__cfRLUnblockHandlers) return false; selectOs(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:6px;padding:8px 12px;cursor:pointer;font-size:12px;font-weight:600" data-cf-modified-de9f14f02c53e42233772be4-="">
                                                Debian 11                                            </div>
                                                                                    <div class="vps-os-opt" data-osid="7" onclick="if (!window.__cfRLUnblockHandlers) return false; selectOs(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:6px;padding:8px 12px;cursor:pointer;font-size:12px;font-weight:600" data-cf-modified-de9f14f02c53e42233772be4-="">
                                                Debian 12                                            </div>
                                                                            </div>
                                                                    <div class="version-list" id="list-rocky" style="display:none;grid-template-columns:1fr 1fr;gap:8px">
                                                                                    <div class="vps-os-opt" data-osid="8" onclick="if (!window.__cfRLUnblockHandlers) return false; selectOs(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:6px;padding:8px 12px;cursor:pointer;font-size:12px;font-weight:600" data-cf-modified-de9f14f02c53e42233772be4-="">
                                                Rocky Linux 8.9                                            </div>
                                                                            </div>
                                                                    <div class="version-list" id="list-ubuntu" style="display:none;grid-template-columns:1fr 1fr;gap:8px">
                                                                                    <div class="vps-os-opt" data-osid="11" onclick="if (!window.__cfRLUnblockHandlers) return false; selectOs(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:6px;padding:8px 12px;cursor:pointer;font-size:12px;font-weight:600" data-cf-modified-de9f14f02c53e42233772be4-="">
                                                Ubuntu 18.04                                            </div>
                                                                                    <div class="vps-os-opt" data-osid="12" onclick="if (!window.__cfRLUnblockHandlers) return false; selectOs(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:6px;padding:8px 12px;cursor:pointer;font-size:12px;font-weight:600" data-cf-modified-de9f14f02c53e42233772be4-="">
                                                Ubuntu 20.04                                            </div>
                                                                                    <div class="vps-os-opt" data-osid="13" onclick="if (!window.__cfRLUnblockHandlers) return false; selectOs(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:6px;padding:8px 12px;cursor:pointer;font-size:12px;font-weight:600" data-cf-modified-de9f14f02c53e42233772be4-="">
                                                Ubuntu 22.04                                            </div>
                                                                                    <div class="vps-os-opt" data-osid="14" onclick="if (!window.__cfRLUnblockHandlers) return false; selectOs(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:6px;padding:8px 12px;cursor:pointer;font-size:12px;font-weight:600" data-cf-modified-de9f14f02c53e42233772be4-="">
                                                Ubuntu 24.04                                            </div>
                                                                            </div>
                                                                    <div class="version-list" id="list-windown-2012" style="display:none;grid-template-columns:1fr 1fr;gap:8px">
                                                                                    <div class="vps-os-opt" data-osid="22" onclick="if (!window.__cfRLUnblockHandlers) return false; selectOs(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:6px;padding:8px 12px;cursor:pointer;font-size:12px;font-weight:600" data-cf-modified-de9f14f02c53e42233772be4-="">
                                                Windown-2012 (Test)                                            </div>
                                                                            </div>
                                                                    <div class="version-list" id="list-windows" style="display:none;grid-template-columns:1fr 1fr;gap:8px">
                                                                                    <div class="vps-os-opt" data-osid="16" onclick="if (!window.__cfRLUnblockHandlers) return false; selectOs(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:6px;padding:8px 12px;cursor:pointer;font-size:12px;font-weight:600" data-cf-modified-de9f14f02c53e42233772be4-="">
                                                Windows 10 Pro                                            </div>
                                                                                    <div class="vps-os-opt" data-osid="17" onclick="if (!window.__cfRLUnblockHandlers) return false; selectOs(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:6px;padding:8px 12px;cursor:pointer;font-size:12px;font-weight:600" data-cf-modified-de9f14f02c53e42233772be4-="">
                                                Windows 2012                                            </div>
                                                                                    <div class="vps-os-opt" data-osid="18" onclick="if (!window.__cfRLUnblockHandlers) return false; selectOs(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:6px;padding:8px 12px;cursor:pointer;font-size:12px;font-weight:600" data-cf-modified-de9f14f02c53e42233772be4-="">
                                                Windows 2016                                            </div>
                                                                                    <div class="vps-os-opt" data-osid="19" onclick="if (!window.__cfRLUnblockHandlers) return false; selectOs(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:6px;padding:8px 12px;cursor:pointer;font-size:12px;font-weight:600" data-cf-modified-de9f14f02c53e42233772be4-="">
                                                Windows 2019                                            </div>
                                                                                    <div class="vps-os-opt" data-osid="20" onclick="if (!window.__cfRLUnblockHandlers) return false; selectOs(this)" style="border:1.5px solid var(--border);background:var(--white);border-radius:6px;padding:8px 12px;cursor:pointer;font-size:12px;font-weight:600" data-cf-modified-de9f14f02c53e42233772be4-="">
                                                Windows 2025                                            </div>
                                                                            </div>
                                                            </div>
                                            </div>
                </div>

                <!-- HOSTNAME / PASSWORD / COUPON -->
                <div class="card">
                    <div class="card-head">
                        <div class="card-head-title"><i class="fa-solid fa-terminal"></i> Hostname & Mật Khẩu</div>
                    </div>
                    <div class="card-body-pad">
                        <div class="form-group">
                            <label class="form-label">Hostname</label>
                            <input type="text" id="hostname" class="form-control" value="dichvucheap-172638019866">
                            <div style="font-size:11px;color:var(--muted);margin-top:4px">Tên nhận diện VPS trên hệ thống</div>
                        </div>
                        <div class="form-group">
                            <label class="form-label">Mật khẩu VPS</label>
                            <div style="position:relative">
                                <input type="text" id="password" class="form-control" value="sD7S8OpciyE30KH" readonly style="font-family:monospace;font-size:13px;padding-right:42px">
                                <button type="button" onclick="if (!window.__cfRLUnblockHandlers) return false; regenPass()" title="Tạo mật khẩu mới" style="position:absolute;right:10px;top:50%;transform:translateY(-50%);background:none;border:none;cursor:pointer;color:var(--muted);font-size:14px" data-cf-modified-de9f14f02c53e42233772be4-="">
                                    <i class="fa-solid fa-rotate-right"></i>
                                </button>
                            </div>
                            <div style="font-size:11px;color:var(--muted);margin-top:4px">Mật khẩu tự sinh ngẫu nhiên, bấm <i class="fa-solid fa-rotate-right"></i> để đổi</div>
                        </div>
                        <div class="form-group">
                            <label class="form-label">Mã Giảm Giá <span style="color:var(--muted);font-weight:400">(nếu có)</span></label>
                            <input type="text" id="coupon" class="form-control" placeholder="Nhập mã giảm giá nếu có" oninput="if (!window.__cfRLUnblockHandlers) return false; delayCoupon()" data-cf-modified-de9f14f02c53e42233772be4-="">
                        </div>
                    </div>
                </div>
            </div>

            <!-- THANH TOÁN (sticky) -->
            <div class="card" style="position:sticky;top:70px">
                <div class="card-head">
                    <div class="card-head-title"><i class="fa-solid fa-receipt" style="color:var(--green)"></i> Thanh Toán</div>
                </div>
                <div class="card-body-pad">
                    <div style="margin-bottom:12px">
                        <div style="font-size:11px;color:var(--muted)">Gói VPS</div>
                        <div style="font-size:13px;font-weight:700;color:var(--text)">vps-vn-pro-9</div>
                    </div>
                    <div style="display:flex;justify-content:space-between;padding:9px 0;border-bottom:1px solid var(--surface2)">
                        <span style="font-size:12px;color:var(--muted)">Chu kỳ</span>
                        <span id="cycleLabel" style="font-size:12.5px;font-weight:600">7 Ngày</span>
                    </div>
                    <div style="display:flex;justify-content:space-between;padding:9px 0;border-bottom:1px solid var(--surface2)">
                        <span style="font-size:12px;color:var(--muted)">Tạm tính</span>
                        <span id="subtotalPrice" style="font-size:12.5px;font-weight:600">300,600đ</span>
                    </div>
                    <div style="display:flex;justify-content:space-between;padding:9px 0;border-bottom:1px solid var(--surface2)">
                        <span style="font-size:12px;color:var(--muted)">Thuế VAT (5%)</span>
                        <span id="taxPrice" style="font-size:12.5px;font-weight:600">15,030đ</span>
                    </div>
                    <div style="padding:14px 0;border-bottom:1px solid var(--surface2)">
                        <div style="font-size:11px;color:var(--muted);margin-bottom:4px">Tổng thanh toán</div>
                        <div style="font-size:26px;font-weight:800;color:var(--accent)"><span id="totalPrice">315,630</span>đ</div>
                    </div>
                    <div style="padding:10px 0;font-size:12px;color:var(--muted)">
                        Số dư: <strong style="color:<br />
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var(--green)"><br />
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<br />
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đ</strong>
                    </div>
                    <button onclick="if (!window.__cfRLUnblockHandlers) return false; confirmBuyVps()" class="btn btn-primary btn-block btn-lg" data-cf-modified-de9f14f02c53e42233772be4-="">
                        <i class="fa-solid fa-shopping-cart"></i> Đặt Hàng
                    </button>
                    <a href="/mua-vps" class="btn btn-secondary btn-block" style="margin-top:8px">
                        <i class="fa-solid fa-arrow-left"></i> Xem Gói Khác
                    </a>
                    <div style="margin-top:12px;padding:10px;background:var(--surface2);border-radius:8px;font-size:11.5px;color:var(--muted);line-height:1.7">
                        <i class="fa-solid fa-circle-info" style="color:var(--accent)"></i>
                        VPS sẽ được tạo tự động. Không tắt trang khi đang xử lý.
                    </div>
                </div>
            </div>

        </div>

        <script type="de9f14f02c53e42233772be4-text/javascript">
            // Bảng đơn giá addon theo TỪNG chu kỳ, lấy từ Cloud247 (đã tính sẵn ở PHP).
            // Trước đây trang chỉ nhúng giá addon của 1 chu kỳ mặc định nên đổi
            // "Thời Gian Sử Dụng" không cập nhật lại giá addon — nay tra theo
            // billingcycle hiện tại mỗi lần tính lại tổng tiền.
            var addonUnitPricesByCycle = {"sevenday":{"ram":4900,"cpu":5880,"disk":196,"ip":4900},"fifteenday":{"ram":7500,"cpu":9000,"disk":300,"ip":7500},"monthly":{"ram":15000,"cpu":18000,"disk":600,"ip":15000},"quarterly":{"ram":44100,"cpu":52920,"disk":1764,"ip":44100},"semiannually":{"ram":86400,"cpu":103680,"disk":3456,"ip":86400},"annually":{"ram":169200,"cpu":203040,"disk":6768,"ip":169200},"biennially":{"ram":331200,"cpu":397440,"disk":13248,"ip":331200},"triennially":{"ram":486000,"cpu":583200,"disk":19440,"ip":486000}};

            var billingcycle = 'sevenday';
            var basePrice = 300600;
            var typingTimer;

            var osid = ''; // Không chọn sẵn giống file muavps (2).php gốc

            function showOsVersions(distro, el) {
                // 1. Reset trạng thái logo
                document.querySelectorAll('.os-group-item').forEach(item => {
                    item.style.borderColor = 'var(--border)';
                    item.style.background = 'var(--white)';
                });
                // 2. Active logo được chọn
                el.style.borderColor = 'var(--accent)';
                el.style.background = '#EFF6FF';

                // 3. Hiển thị danh sách phiên bản tương ứng
                document.getElementById('version-selector').style.display = 'block';
                document.querySelectorAll('.version-list').forEach(list => list.style.display = 'none');
                document.getElementById('list-' + distro).style.display = 'grid';

                // 4. Reset osid khi đổi nhóm để khách phải chọn lại phiên bản
                osid = '';
                document.querySelectorAll('.vps-os-opt').forEach(opt => {
                    opt.style.borderColor = 'var(--border)';
                    opt.style.background = 'var(--white)';
                });
            }

            function selectOs(el) {
                // Reset style các phiên bản trong cùng nhóm
                document.querySelectorAll('.vps-os-opt').forEach(opt => {
                    opt.style.borderColor = 'var(--border)';
                    opt.style.background = 'var(--white)';
                });
                // Active phiên bản được chọn
                el.style.borderColor = 'var(--accent)';
                el.style.background = '#EFF6FF';
                osid = el.dataset.osid; // Gán ID để thanh toán
            }

            function regenPass() {
                var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
                var p = '';
                for (var i = 0; i < 15; i++) p += chars[Math.floor(Math.random() * chars.length)];
                document.getElementById('password').value = p;
            }

            function delayCoupon() {
                clearTimeout(typingTimer);
                typingTimer = setTimeout(function() {
                    /* coupon logic */ }, 1000);
            }

            function confirmBuyVps() {
                if (!osid) {
                    toastr.error('Vui lòng chọn hệ điều hành!', '');
                    return;
                }
                if (!billingcycle) {
                    toastr.error('Vui lòng chọn thời gian!', '');
                    return;
                }
                Swal.fire({
                    title: 'Xác Nhận Thanh Toán',
                    text: 'Mua VPS gói vps-vn-pro-9 — ' + document.getElementById('cycleLabel').textContent + '?',
                    icon: 'warning',
                    showCancelButton: true,
                    confirmButtonText: 'Đồng Ý',
                    cancelButtonText: 'Hủy',
                    confirmButtonColor: '#3B82F6',
                    cancelButtonColor: '#EF4444'
                }).then(function(r) {
                    if (r.isConfirmed) {
                        Swal.fire({
                            icon: 'info',
                            title: 'Đang Xử Lý',
                            html: 'Không Được Tắt Trang Này, Vui Lòng Đợi!',
                            timerProgressBar: true,
                            allowOutsideClick: false,
                            allowEscapeKey: false,
                            allowEnterKey: false,
                            didOpen: function() {
                                Swal.showLoading()
                            }
                        });
                        $.ajax({
                            url: '/xulyvps.php',
                            method: 'POST',
                            dataType: 'JSON',
                            data: {
                                type: 'tao',
                                hdh: osid,
                                timehethan: billingcycle,
                                id: '9',
                                domain: $('#hostname').val(),
                                password: $('#password').val(),
                                addon_ram: $('#addon_ram').val(),
                                addon_cpu: $('#addon_cpu').val(),
                                addon_disk: $('#addon_disk').val(),
                                addon_ip: $('#addon_ip').val(),
                                discount_code: $('#coupon').val()
                            },
                            success: function(data) {
                                if (data.status != '1') Swal.fire('Thành Công', data.msg, 'success').then(function() {
                                    window.location.href = '';
                                });
                                else Swal.fire('Thất Bại', data.msg, 'error');
                            },
                            error: function(xhr) {
                                Swal.fire('Thất Bại', xhr.responseText, 'error');
                            }
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                    }
                });
            }

            function changeAddon(id, val) {
                let input = document.getElementById(id);
                let current = parseInt(input.value) || 0;
                let newValue = current + val;
                if (newValue < 0) newValue = 0;
                input.value = newValue;
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            }

            function calcTotal() {
                let ram = parseInt(document.getElementById('addon_ram').value) || 0;
                let cpu = parseInt(document.getElementById('addon_cpu').value) || 0;
                let disk = parseInt(document.getElementById('addon_disk').value) || 0;
                let ip = parseInt(document.getElementById('addon_ip').value) || 0;

                // Giá addon phụ thuộc chu kỳ đang chọn (Cloud247 định giá theo
                // billing_cycle, không có giá phẳng chung cho mọi chu kỳ).
                let cyclePrices = addonUnitPricesByCycle[billingcycle] || {
                    ram: 0,
                    cpu: 0,
                    disk: 0,
                    ip: 0
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                let addonTotal = (ram * cyclePrices.ram) + (cpu * cyclePrices.cpu) + (disk * cyclePrices.disk) + (ip * cyclePrices.ip);

                document.getElementById('addonPriceLabel_ram').textContent = cyclePrices.ram.toLocaleString('vi-VN');
                document.getElementById('addonPriceLabel_cpu').textContent = cyclePrices.cpu.toLocaleString('vi-VN');
                document.getElementById('addonPriceLabel_disk').textContent = cyclePrices.disk.toLocaleString('vi-VN');
                document.getElementById('addonPriceLabel_ip').textContent = cyclePrices.ip.toLocaleString('vi-VN');

                let subtotal = basePrice + addonTotal;
                let tax = Math.round(subtotal * 0.05);
                let total = subtotal + tax;
                document.getElementById('subtotalPrice').textContent = subtotal.toLocaleString('vi-VN') + 'đ';
                document.getElementById('taxPrice').textContent = tax.toLocaleString('vi-VN') + 'đ';
                document.getElementById('totalPrice').textContent = total.toLocaleString('vi-VN');
            }

            // Cập nhật hàm chọn thời gian để thay đổi giá gốc
            function selectTime(el) {
                document.querySelectorAll('.vps-time-opt').forEach(o => {
                    o.style.border = '1.5px solid var(--border)';
                    o.style.background = 'var(--white)';
                });
                el.style.border = '1.5px solid var(--accent)';
                el.style.background = '#EFF6FF';

                billingcycle = el.dataset.duration;
                basePrice = parseInt(el.dataset.price); // Cập nhật basePrice mới
                calcTotal();
                document.getElementById('cycleLabel').textContent = el.dataset.cycle;
            }
        </script>

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