/*
Theme Name: ILL – Internet Leased Line
Theme URI: https://internetleasedline.vn
Author: INFOVINA
Description: Giao diện riêng cho internetleasedline.vn – bản sắc "Cáp quang đêm": nền mực, tín hiệu xanh lục, số liệu kiểu kỹ thuật. Nhẹ, không phụ thuộc plugin.
Version: 3.1.3
Requires PHP: 8.0
Text Domain: ill
*/

/* =========================================================
   1. TOKENS
   ========================================================= */
:root{
  --ink-950:#060B14;--ink-900:#0B1220;--ink-850:#0F1829;--ink-800:#142238;--ink-700:#1D2F4D;
  --ln-d:rgba(160,190,230,.14);--ln-d2:rgba(160,190,230,.26);
  --tx-d:#E8EEF7;--tx-d2:#B3C0D3;--tx-d3:#8596AE;
  --sig:#7CFFB2;--sig-2:#3BE08F;--sig-ink:#05774A;--sig-soft:#E6FBF0;
  --blue:#2F80FF;--blue-l:#1A5FD0;--blue-soft:#EAF2FF;--cyan:#6FD3FF;
  --amber:#FFB547;--amber-ink:#8A5300;--amber-soft:#FFF6E6;
  --paper:#F3F6FA;--paper-2:#E9EEF5;--ln:#DCE3EC;--ln-2:#C8D2DF;
  --tx:#0B1220;--tx-2:#3F4F66;--tx-3:#5A6A80;
  --f-sans:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --f-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --w:1240px;--r-s:6px;--r:10px;--r-l:16px;--ease:.22s cubic-bezier(.4,0,.2,1);
  --topbar-h:34px;--header-h:70px;--header-h-min:58px;--top-h:104px;
  --ic-phone:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M6.62 10.79c1.44 2.83 3.76 5.14 6.59 6.59l2.2-2.2c.28-.28.68-.36 1.03-.25 1.12.37 2.33.57 3.56.57.55 0 1 .45 1 1V20c0 .55-.45 1-1 1-9.39 0-17-7.61-17-17 0-.55.45-1 1-1h3.5c.55 0 1 .45 1 1 0 1.24.2 2.44.57 3.57.11.35.03.74-.25 1.02l-2.2 2.2z'/%3E%3C/svg%3E");
}
@media (max-width:1023.98px){:root{--topbar-h:32px;--header-h:64px;--header-h-min:56px;--top-h:96px}}
@media (max-width:639.98px){:root{--topbar-h:0px;--header-h:58px;--header-h-min:54px;--top-h:58px}}

/* =========================================================
   2. NỀN TẢNG
   ========================================================= */
*,::before,::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--header-h-min) + 16px)}
body{margin:0;padding-top:var(--top-h);font-family:var(--f-sans);font-size:17px;line-height:1.7;color:var(--tx-2);background:var(--ink-950);-webkit-font-smoothing:antialiased}
#ill-main{display:block;background:#fff}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue-l);text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--tx);text-decoration:underline}
h1,h2,h3,h4,h5{margin:0 0 .55em;color:var(--tx);font-weight:700;line-height:1.24;letter-spacing:-.02em;text-wrap:balance;overflow:visible}
h1{font-size:clamp(32px,4.4vw,54px);line-height:1.14;letter-spacing:-.032em}
h2{font-size:clamp(26px,3vw,38px);letter-spacing:-.026em}
h3{font-size:clamp(18px,1.6vw,21px);font-weight:650;letter-spacing:-.012em}
h4{font-size:16.5px;font-weight:650}
p{margin:0 0 1.05em;text-wrap:pretty}
ul,ol{margin:0 0 1.05em;padding-left:1.25em}
li{margin-bottom:.4em}
strong,b{font-weight:700}
.mono{font-family:var(--f-mono)}
.wrap{max-width:var(--w);margin:0 auto;padding:0 24px}
.wrap>*,.g2>*,.g3>*,.g4>*{min-width:0}
::selection{background:var(--sig);color:var(--ink-950)}
.ill-just{text-align:justify;text-justify:inter-word;hyphens:none}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--sig);outline-offset:3px;border-radius:4px}
.ill-skip{position:absolute;left:-9999px;top:0;z-index:9999;background:var(--sig);color:var(--ink-950);padding:12px 20px;border-radius:0 0 8px 0;font-weight:700}
.ill-skip:focus{left:0}
.ill-sentinel{position:absolute;top:0;left:0;width:1px;height:40px;pointer-events:none;opacity:0}
.screen-reader-text{border:0;clip-path:inset(50%);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px;word-wrap:normal!important}

.dark,.dark-2{background:var(--ink-900);color:var(--tx-d2)}
.dark-2{background:var(--ink-950)}
.dark h1,.dark h2,.dark h3,.dark h4,.dark-2 h1,.dark-2 h2,.dark-2 h3,.dark-2 h4{color:#fff}
.dark a:not(.btn),.dark-2 a:not(.btn){color:var(--cyan)}
.dark a:not(.btn):hover,.dark-2 a:not(.btn):hover{color:#fff}
.dark strong,.dark-2 strong{color:var(--tx-d)}
.paper{background:var(--paper)}
.light{background:#fff}
.gridlines{position:relative;isolation:isolate}
.gridlines::before{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;background-image:linear-gradient(var(--ln-d) 1px,transparent 1px),linear-gradient(90deg,var(--ln-d) 1px,transparent 1px);background-size:56px 56px;-webkit-mask-image:radial-gradient(ellipse 80% 70% at 70% 30%,#000 30%,transparent 80%);mask-image:radial-gradient(ellipse 80% 70% at 70% 30%,#000 30%,transparent 80%);opacity:.7}

/* =========================================================
   3. NÚT
   ========================================================= */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:48px;padding:0 22px;border-radius:var(--r-s);font-family:var(--f-sans);font-weight:650;font-size:15.5px;line-height:1.2;text-decoration:none!important;border:1px solid transparent;cursor:pointer;transition:background var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease),transform var(--ease);white-space:nowrap}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:none}
.btn-lg{min-height:54px;font-size:16.5px;padding:0 26px}
.btn-block{width:100%}
.btn .ar{font-family:var(--f-mono);transition:transform var(--ease)}
.btn:hover .ar{transform:translateX(3px)}
.btn-primary,.btn-ink{background:var(--ink-900);color:#fff;border-color:var(--ink-900)}
.btn-primary:hover,.btn-ink:hover{background:var(--ink-700);border-color:var(--ink-700);color:#fff}
.btn-sig,.dark .btn-primary,.dark-2 .btn-primary,.page-hero .btn-primary,.side-hot .btn-primary{background:var(--sig);color:var(--ink-950);border-color:var(--sig)}
.btn-sig:hover,.dark .btn-primary:hover,.dark-2 .btn-primary:hover,.page-hero .btn-primary:hover{background:#A6FFCB;border-color:#A6FFCB;color:var(--ink-950);box-shadow:0 8px 28px -6px rgba(124,255,178,.45)}
.btn-out{background:#fff;color:var(--tx);border-color:var(--ln-2)}
.btn-out:hover{border-color:var(--tx);color:var(--tx)}
.btn-line,.dark .btn-out,.dark-2 .btn-out,.page-hero .btn-out{background:transparent;color:#fff;border-color:rgba(255,255,255,.34)}
.btn-line:hover,.dark .btn-out:hover,.dark-2 .btn-out:hover,.page-hero .btn-out:hover{border-color:#fff;background:rgba(255,255,255,.06);color:#fff}
.btn-call,.btn-tel{}
.btn-call::before,.btn-tel::before,.btn-call-lite::before{content:"";width:17px;height:17px;flex:0 0 auto;background:currentColor;-webkit-mask:var(--ic-phone) center/contain no-repeat;mask:var(--ic-phone) center/contain no-repeat}
.btn-call{background:var(--sig);color:var(--ink-950);border-color:var(--sig)}
.btn-call:hover{background:#A6FFCB;color:var(--ink-950);border-color:#A6FFCB}
.btn-call-lite{background:#fff;color:var(--tx);border-color:var(--ln-2)}

/* =========================================================
   4. ĐẦU TRANG
   ========================================================= */
.site-top{position:fixed;top:0;left:0;right:0;z-index:70}
.admin-bar .site-top{top:32px}
@media (max-width:782px){.admin-bar .site-top{top:46px}}
.topbar{height:var(--topbar-h);overflow:hidden;background:var(--ink-950);border-bottom:1px solid var(--ln-d);color:var(--tx-d3);font-family:var(--f-mono);font-size:12px;letter-spacing:.01em;transition:height var(--ease),opacity var(--ease)}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;height:100%}
.tb-left{display:flex;gap:22px;white-space:nowrap;overflow:hidden}
.tb-left span{display:inline-flex;align-items:center;gap:8px}
.dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--sig);animation:pulse 2.4s infinite;flex:0 0 auto}
.dot.b{background:var(--blue);animation-name:pulseb;animation-delay:1.2s}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(124,255,178,.5)}70%{box-shadow:0 0 0 7px rgba(124,255,178,0)}100%{box-shadow:0 0 0 0 rgba(124,255,178,0)}}
@keyframes pulseb{0%{box-shadow:0 0 0 0 rgba(47,128,255,.5)}70%{box-shadow:0 0 0 7px rgba(47,128,255,0)}100%{box-shadow:0 0 0 0 rgba(47,128,255,0)}}
.topbar a{color:var(--tx-d);font-weight:500}
.topbar a:hover{color:var(--sig);text-decoration:none}
.site-header{height:var(--header-h);background:rgba(11,18,32,.88);-webkit-backdrop-filter:saturate(140%) blur(14px);backdrop-filter:saturate(140%) blur(14px);border-bottom:1px solid var(--ln-d);transition:height var(--ease),background var(--ease)}
.site-header .wrap{display:flex;align-items:center;gap:18px;height:100%}
.site-top.is-stuck .topbar{height:0;opacity:0;border:0}
.site-top.is-stuck .site-header{height:var(--header-h-min);background:rgba(6,11,20,.95)}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none!important;flex:0 0 auto;min-height:44px}
.brand-mark{width:38px;height:38px;object-fit:contain;transition:width var(--ease),height var(--ease)}
.brand-txt{display:flex;flex-direction:column;line-height:1.1}
.brand-txt .wm{font-family:var(--f-mono);font-size:16.5px;font-weight:700;color:#fff;letter-spacing:-.02em}
.brand-txt .wm i{font-style:normal;color:var(--sig)}
.brand-txt small{font-size:11.5px;color:var(--tx-d3);margin-top:4px;font-weight:500}
.site-top.is-stuck .brand-mark{width:32px;height:32px}
.site-top.is-stuck .brand-txt small{display:none}

.main-nav{margin-left:auto}
.main-nav ul{list-style:none;display:flex;gap:2px;margin:0;padding:0}
.main-nav li{margin:0;position:relative}
.main-nav a{display:flex;align-items:center;min-height:44px;padding:0 11px;white-space:nowrap;border-radius:var(--r-s);color:var(--tx-d2);font-size:14.5px;font-weight:500;text-decoration:none!important}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.05)}
.main-nav .current-menu-item>a,.main-nav .current_page_item>a,.main-nav .current-menu-ancestor>a{color:#fff}
.main-nav>ul>li>a{position:relative}
.main-nav>ul>li.current-menu-item>a::after,.main-nav>ul>li.current-menu-ancestor>a::after{content:"";position:absolute;left:11px;right:11px;bottom:6px;height:2px;border-radius:2px;background:var(--sig);box-shadow:0 0 10px var(--sig)}
.main-nav ul ul{display:none;position:absolute;top:100%;left:0;min-width:250px;background:var(--ink-850);border:1px solid var(--ln-d2);border-radius:var(--r);box-shadow:0 24px 48px -12px rgba(0,0,0,.6);padding:8px;flex-direction:column;gap:0;z-index:5}
.main-nav li:hover>ul,.main-nav li:focus-within>ul{display:flex}
.main-nav ul ul a{min-height:40px;padding:0 12px;font-size:14.5px;color:var(--tx-d2)}
.main-nav ul ul a:hover{background:rgba(124,255,178,.08);color:var(--sig)}
.sub-tg,.nav-cta{display:none}
.header-tel{display:none;align-items:center;gap:9px;padding:0 14px;min-height:42px;border-radius:var(--r-s);border:1px solid var(--ln-d2);color:#fff!important;font-family:var(--f-mono);font-weight:600;font-size:14.5px;white-space:nowrap;text-decoration:none!important}
.header-tel:hover{border-color:var(--sig);color:var(--sig)!important}
.header-cta{min-height:42px;padding:0 16px;font-size:14.5px}
.nav-toggle{display:none;margin-left:auto;background:transparent;border:1px solid var(--ln-d2);border-radius:var(--r-s);width:46px;height:46px;cursor:pointer;position:relative;padding:0}
.nt-bars,.nt-bars::before,.nt-bars::after{position:absolute;left:50%;width:20px;height:2px;border-radius:2px;background:#fff;transition:transform var(--ease),background var(--ease)}
.nt-bars{top:50%;transform:translate(-50%,-50%)}
.nt-bars::before,.nt-bars::after{content:"";left:0}
.nt-bars::before{top:-6px}.nt-bars::after{top:6px}
.nav-open .nt-bars{background:transparent}
.nav-open .nt-bars::before{transform:translateY(6px) rotate(45deg)}
.nav-open .nt-bars::after{transform:translateY(-6px) rotate(-45deg)}
@media (min-width:1024px){
  .main-nav>ul>li.menu-item-has-children>a{padding-right:24px}
  .main-nav>ul>li.menu-item-has-children>a::before{content:"";position:absolute;right:10px;top:50%;width:5px;height:5px;border-right:1.6px solid;border-bottom:1.6px solid;transform:translateY(-70%) rotate(45deg);opacity:.6}
  .header-tel{display:inline-flex}
}
@media (max-width:1199.98px){.main-nav a{padding:0 8px;font-size:14px}.header-cta{display:none}}
@media (max-width:1023.98px){
  .nav-toggle{display:block}
  .main-nav{display:none;position:absolute;top:100%;left:0;right:0;margin:0;background:var(--ink-900);border-bottom:1px solid var(--ln-d2);box-shadow:0 30px 40px -20px rgba(0,0,0,.7);padding:10px 0 0;max-height:calc(100dvh - var(--header-h));flex-direction:column}
  .nav-open .main-nav{display:flex}
  .main-nav>ul{flex-direction:column;gap:0;overflow-y:auto;overscroll-behavior:contain;flex:1 1 auto}
  .main-nav>ul>li{padding:0 12px}
  .main-nav>ul>li+li{border-top:1px solid var(--ln-d)}
  .main-nav>ul>li>a{min-height:54px;padding:0 56px 0 12px;font-size:16.5px;font-weight:600;color:var(--tx-d)}
  .main-nav>ul>li>a::after{display:none}
  .main-nav ul ul{display:none;position:static;margin:0 0 10px 12px;padding:0 0 0 12px;background:transparent;border:0;border-left:2px solid var(--ln-d2);border-radius:0;box-shadow:none;min-width:0}
  .main-nav li:hover>ul{display:none}
  .main-nav li.sub-open>ul,.main-nav li.sub-open:hover>ul{display:block}
  .main-nav ul ul a{min-height:46px;font-size:15.5px}
  .sub-tg{display:block;position:absolute;top:0;right:12px;width:48px;height:54px;padding:0;margin:0;background:none;border:0;cursor:pointer}
  .sub-tg::before{content:"";position:absolute;left:50%;top:50%;width:9px;height:9px;margin:-7px 0 0 -5px;border-right:2px solid var(--tx-d2);border-bottom:2px solid var(--tx-d2);transform:rotate(45deg);transition:transform .2s,margin-top .2s}
  .sub-open>.sub-tg::before{transform:rotate(225deg);margin-top:-2px;border-color:var(--sig)}
  .nav-cta{display:grid;gap:8px;position:sticky;bottom:0;padding:14px 16px calc(14px + env(safe-area-inset-bottom));background:var(--ink-950);border-top:1px solid var(--ln-d2)}
  .tb-left span:nth-child(3){display:none}
}

/* =========================================================
   5. KHỐI DÙNG CHUNG
   ========================================================= */
.sec{padding:96px 0}
.sec-sm{padding:56px 0}
.sec-head{max-width:760px;margin:0 0 48px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-head.center .eyebrow{justify-content:center}
.sec-head p{font-size:18px;line-height:1.7;color:var(--tx-3);margin:0}
.dark .sec-head p,.dark-2 .sec-head p{color:var(--tx-d2)}
.eyebrow{display:inline-flex;align-items:center;gap:12px;margin:0 0 18px;font-family:var(--f-mono);font-size:13px;font-weight:500;line-height:1.3;color:var(--sig-ink)}
.eyebrow b{display:inline-flex;align-items:center;justify-content:center;min-width:34px;height:24px;padding:0 6px;border:1px solid currentColor;border-radius:4px;font-weight:600;font-size:12px}
.dark .eyebrow,.dark-2 .eyebrow,.page-hero .eyebrow,.hero .eyebrow,.cta-band .eyebrow{color:var(--sig)}
.g2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.g3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.g4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.lede{font-size:18.5px;color:var(--tx-3)}

.card{position:relative;background:#fff;border:1px solid var(--ln);border-radius:var(--r);padding:24px;transition:border-color var(--ease),box-shadow var(--ease)}
.card:hover{border-color:var(--ln-2);box-shadow:0 14px 30px -18px rgba(11,18,32,.28)}
.card h3{margin-bottom:8px}
.card p{font-size:16px;line-height:1.65;color:var(--tx-3);margin-bottom:0}

.tag{display:inline-flex;align-items:center;gap:6px;font-family:var(--f-mono);font-size:12px;font-weight:500;line-height:1.2;padding:6px 9px;border-radius:4px;background:var(--paper);border:1px solid var(--ln);color:var(--tx-2)}
.tag.g{background:var(--sig-soft);border-color:#B7EFD0;color:var(--sig-ink)}
.tag.b{background:var(--blue-soft);border-color:#C7DAFB;color:var(--blue-l)}
.tag.a{background:var(--amber-soft);border-color:#F6D9A6;color:var(--amber-ink)}
.dark .tag,.dark-2 .tag{background:rgba(255,255,255,.04);border-color:var(--ln-d2);color:var(--tx-d2)}
.dark .tag.g,.dark-2 .tag.g{background:rgba(124,255,178,.08);border-color:rgba(124,255,178,.35);color:var(--sig)}
.tags{display:flex;flex-wrap:wrap;gap:6px}
.badge{display:inline-flex;align-items:center;gap:6px;align-self:flex-start;font-family:var(--f-mono);font-size:12px;font-weight:600;padding:5px 10px;border-radius:999px;margin-bottom:14px;background:var(--sig-soft);color:var(--sig-ink)}
.badge-blue{background:var(--blue-soft);color:var(--blue-l)}
.badge-amber{background:var(--amber-soft);color:var(--amber-ink)}

.checkrow{list-style:none;padding:0;margin:0}
.checkrow li{position:relative;padding-left:28px;margin-bottom:12px}
.checkrow li::before{content:"";position:absolute;left:2px;top:.5em;width:13px;height:7px;border-left:2px solid var(--sig-ink);border-bottom:2px solid var(--sig-ink);transform:rotate(-45deg)}
.dark .checkrow li::before,.dark-2 .checkrow li::before{border-color:var(--sig)}

.callout{background:var(--paper);border:1px solid var(--ln);border-left:3px solid var(--blue-l);border-radius:0 var(--r) var(--r) 0;padding:20px 24px;margin:28px 0;font-size:16.5px;line-height:1.7}
.callout p:last-child{margin-bottom:0}
.callout.warn{background:var(--amber-soft);border-color:#F6D9A6;border-left-color:#D98A00}
.callout h3,.callout h4{font-size:16.5px!important;margin:0 0 8px!important}
.callout strong{color:var(--tx)}
.callout a{text-decoration:underline;text-underline-offset:3px}

.table-scroll{overflow-x:auto;border:1px solid var(--ln);border-radius:var(--r);background:#fff;margin:24px 0}
.table-scroll table{width:100%;min-width:560px;border-collapse:collapse;font-size:15.5px;line-height:1.55}
.table-scroll th,.table-scroll td{padding:13px 16px;text-align:left;vertical-align:top;border-bottom:1px solid var(--ln);overflow-wrap:break-word}
.table-scroll thead th{background:var(--ink-900);color:var(--tx-d);font-family:var(--f-mono);font-size:12.5px;font-weight:600;letter-spacing:.01em;border-bottom:0}
.table-scroll tbody tr:nth-child(2n){background:#FAFBFD}
.table-scroll tbody tr:last-child td{border-bottom:0}
.table-scroll td:first-child{font-weight:600;color:var(--tx)}

.faq{max-width:900px;margin:0 auto;border-top:1px solid var(--ln)}
.faq details{border-bottom:1px solid var(--ln)}
.faq summary{list-style:none;cursor:pointer;display:flex;gap:16px;align-items:baseline;padding:22px 48px 22px 0;position:relative;font-size:18px;font-weight:650;color:var(--tx);line-height:1.45}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"Q";font-family:var(--f-mono);font-size:13px;font-weight:600;color:var(--sig-ink);flex:0 0 auto}
.faq summary::after{content:"";position:absolute;right:10px;top:50%;width:10px;height:10px;margin-top:-7px;border-right:2px solid var(--tx-3);border-bottom:2px solid var(--tx-3);transform:rotate(45deg);transition:transform var(--ease)}
.faq details[open] summary::after{transform:rotate(225deg);margin-top:-2px;border-color:var(--sig-ink)}
.faq summary:hover{color:var(--blue-l)}
.faq details>div{padding:0 0 24px 29px;color:var(--tx-2);font-size:16.5px}
.faq details>div p:last-child{margin-bottom:0}

/* =========================================================
   6. TRANG CHỦ
   ========================================================= */
.hero{position:relative;overflow:hidden;background:var(--ink-900);color:var(--tx-d2);padding:72px 0 132px;isolation:isolate}
.hero::after{content:"";position:absolute;top:-220px;right:-160px;width:720px;height:720px;border-radius:50%;background:radial-gradient(circle,rgba(47,128,255,.20),rgba(47,128,255,0) 65%);pointer-events:none;z-index:-1}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);gap:56px;align-items:center}
.hero h1{color:#fff;margin-bottom:22px}
.hero h1 em{font-style:normal;color:var(--sig);display:block}
.hero-lead{font-size:19px;line-height:1.72;color:var(--tx-d2);max-width:58ch;margin-bottom:30px}
.hero-lead strong{color:#fff}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:30px}
.hero-meta{display:flex;flex-wrap:wrap;gap:8px 22px;list-style:none;padding:0;margin:0;font-family:var(--f-mono);font-size:13px;color:var(--tx-d2)}
.hero-meta li{display:inline-flex;align-items:center;gap:9px;margin:0}
.hero .wrap{position:relative;z-index:1}
.fiber{position:absolute;left:0;right:0;bottom:0;height:120px;pointer-events:none;z-index:0}
.fiber svg{width:100%;height:100%;display:block}
.fiber .pl{stroke-dasharray:6 240;animation:run 6s linear infinite}
.fiber .pl.s2{animation-duration:8s;animation-delay:-3s}
.fiber .pl.s3{animation-duration:10s;animation-delay:-5s}
@keyframes run{from{stroke-dashoffset:0}to{stroke-dashoffset:-1476}}

.console{background:linear-gradient(180deg,var(--ink-850),var(--ink-900));border:1px solid var(--ln-d2);border-radius:var(--r-l);box-shadow:0 40px 80px -30px rgba(0,0,0,.7),inset 0 1px 0 rgba(255,255,255,.04);overflow:hidden}
.console-h{display:flex;align-items:center;gap:10px;padding:13px 18px;border-bottom:1px solid var(--ln-d);font-family:var(--f-mono);font-size:12.5px;color:var(--tx-d3)}
.console-h .lights{display:flex;gap:6px}
.console-h .lights i{width:9px;height:9px;border-radius:50%;background:var(--ink-700)}
.console-h .ttl{margin-left:6px;color:var(--tx-d2)}
.console-h .st{margin-left:auto;display:inline-flex;align-items:center;gap:8px;color:var(--sig)}
.console-b{padding:6px 18px 4px;margin:0}
.c-row{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:baseline;padding:12px 0;border-bottom:1px dashed var(--ln-d)}
.c-row:last-child{border-bottom:0}
.c-row dt{font-size:14px;color:var(--tx-d3);margin:0}
.c-row dd{margin:0;font-family:var(--f-mono);font-size:15px;font-weight:600;color:var(--tx-d);text-align:right}
.c-row dd .u{color:var(--tx-d3);font-weight:400;font-size:13px}
.c-row dd.g{color:var(--sig)}
.c-bars{padding:14px 18px 18px;border-top:1px solid var(--ln-d);display:grid;gap:10px}
.c-bars .cap{font-family:var(--f-mono);font-size:12px;color:var(--tx-d3);margin:0 0 2px}
.c-bar{display:grid;grid-template-columns:96px 1fr 56px;gap:12px;align-items:center;font-family:var(--f-mono);font-size:12px;color:var(--tx-d3)}
.c-bar .tr{height:6px;border-radius:3px;background:rgba(255,255,255,.07);overflow:hidden}
.c-bar .tr i{display:block;height:100%;border-radius:3px;background:linear-gradient(90deg,var(--blue),var(--sig))}
.c-bar .tr i.alt{background:linear-gradient(90deg,#39506f,#6d86a8)}
.c-bar b{color:var(--tx-d);font-weight:600;text-align:right}
.console-f{padding:11px 18px;background:rgba(0,0,0,.18);border-top:1px solid var(--ln-d);font-size:12.5px;color:var(--tx-d3);margin:0}

.strip{background:var(--ink-950);border-top:1px solid var(--ln-d);border-bottom:1px solid var(--ln-d);color:var(--tx-d2)}
.strip .wrap{display:grid;grid-template-columns:auto 1fr;gap:44px;align-items:center;padding-top:28px;padding-bottom:28px}
.carriers{display:flex;align-items:center;gap:14px;font-size:13.5px;color:var(--tx-d3)}
.carriers .cw{font-family:var(--f-mono);font-size:22px;font-weight:700;color:#fff;letter-spacing:-.02em}
.carriers .sep{width:1px;height:28px;background:var(--ln-d2)}
.kpis{display:grid;grid-template-columns:repeat(4,1fr);border-left:1px solid var(--ln-d)}
.kpis div{padding:4px 22px;border-right:1px solid var(--ln-d)}
.kpis b{display:block;font-family:var(--f-mono);font-size:clamp(24px,2.6vw,32px);font-weight:600;color:#fff;letter-spacing:-.03em;line-height:1.1}
.kpis b i{font-style:normal;color:var(--sig)}
.kpis span{display:block;font-size:13.5px;color:var(--tx-d3);margin-top:6px;line-height:1.4}

.split{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:64px;align-items:start}
.split .sticky{position:sticky;top:calc(var(--header-h-min) + 32px)}
.idx-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--ln)}
.idx-list li{display:grid;grid-template-columns:64px 1fr;gap:18px;padding:26px 0;border-bottom:1px solid var(--ln);margin:0}
.idx-list .n{font-family:var(--f-mono);font-size:13px;font-weight:600;color:var(--sig-ink);padding-top:4px}
.idx-list h3{margin-bottom:6px}
.idx-list p{margin:0;color:var(--tx-3);font-size:16.5px}

.vs{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--ln);border-radius:var(--r-l);overflow:hidden;background:#fff}
.vs-col{padding:32px}
.vs-col.on{background:var(--ink-900);color:var(--tx-d2)}
.vs-col h3{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:6px}
.vs-col.on h3{color:#fff}
.vs-col .sub{font-size:14.5px;color:var(--tx-3);margin-bottom:22px}
.vs-col.on .sub{color:var(--tx-d3)}
.vs-pipe{height:92px;border:1px solid var(--ln);border-radius:var(--r);margin-bottom:22px;background:var(--paper);overflow:hidden}
.vs-col.on .vs-pipe{border-color:var(--ln-d2);background:rgba(255,255,255,.02)}
.vs-pipe svg{width:100%;height:100%;display:block}
.vs-rows{margin:0}
.vs-rows>div{display:grid;grid-template-columns:130px 1fr;gap:14px;padding:11px 0;border-top:1px dashed var(--ln)}
.vs-col.on .vs-rows>div{border-color:var(--ln-d)}
.vs-rows dt{font-family:var(--f-mono);font-size:12.5px;color:var(--tx-3);padding-top:2px}
.vs-col.on .vs-rows dt{color:var(--tx-d3)}
.vs-rows dd{margin:0;font-size:15.5px;color:var(--tx-2)}
.vs-col.on .vs-rows dd{color:var(--tx-d)}
.vs-col.on .vs-rows dd b{color:var(--sig)}

.tools{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:24px}
.tool{background:var(--ink-850);border:1px solid var(--ln-d2);border-radius:var(--r-l);padding:28px;display:flex;flex-direction:column}
.tool h3{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:6px}
.tool h3 .tag{margin-left:auto}
.tool>p{color:var(--tx-d3);font-size:15px;margin-bottom:22px}
.t-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px 26px;margin-bottom:22px}
.t-f{display:flex;flex-direction:column;gap:6px}
.t-f.full{grid-column:1/-1}
.t-f label{font-size:14px;color:var(--tx-d2);display:flex;justify-content:space-between;gap:10px}
.t-f label .v{font-family:var(--f-mono);color:#fff;font-weight:600;white-space:nowrap}
.t-f input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:32px;background:transparent;cursor:pointer;margin:0}
.t-f input[type=range]::-webkit-slider-runnable-track{height:4px;border-radius:2px;background:linear-gradient(90deg,var(--sig) var(--p,50%),rgba(255,255,255,.14) var(--p,50%))}
.t-f input[type=range]::-moz-range-track{height:4px;border-radius:2px;background:rgba(255,255,255,.14)}
.t-f input[type=range]::-moz-range-progress{height:4px;border-radius:2px;background:var(--sig)}
.t-f input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:22px;height:22px;border-radius:50%;background:#fff;border:4px solid var(--sig);margin-top:-9px}
.t-f input[type=range]::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:#fff;border:4px solid var(--sig)}
.seg{display:flex;flex-wrap:wrap;gap:6px}
.seg button{flex:1 1 auto;min-height:44px;padding:0 12px;border-radius:var(--r-s);border:1px solid var(--ln-d2);background:transparent;color:var(--tx-d2);font-family:var(--f-mono);font-size:14px;font-weight:600;cursor:pointer;transition:all var(--ease)}
.seg button:hover{border-color:var(--tx-d2);color:#fff}
.seg button[aria-pressed=true]{background:var(--sig);border-color:var(--sig);color:var(--ink-950)}
.t-out{margin-top:auto;border:1px solid var(--ln-d2);border-radius:var(--r);background:var(--ink-950);padding:18px 20px}
.t-out .row{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.t-out .k{font-size:13px;color:var(--tx-d3);margin-bottom:4px}
.t-out .big{font-family:var(--f-mono);font-size:clamp(26px,2.6vw,34px);font-weight:600;color:var(--sig);letter-spacing:-.03em;line-height:1.1}
.t-out .big small{font-size:14px;color:var(--tx-d3);font-weight:400;margin-left:4px;letter-spacing:0}
.t-out .big.w{color:#fff}
.t-out .note{font-size:13px;color:var(--tx-d3);margin:12px 0 0;line-height:1.55}
.t-act{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.sla-tbl{width:100%;border-collapse:collapse;margin-top:14px;font-family:var(--f-mono);font-size:13px}
.sla-tbl td{padding:8px 0;border-top:1px dashed var(--ln-d);color:var(--tx-d2)}
.sla-tbl td:last-child{text-align:right;color:#fff}
.sla-tbl tr.on td{color:var(--sig)}

.segs{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.seg-card{display:grid;grid-template-columns:56px 1fr;gap:18px;background:#fff;border:1px solid var(--ln);border-radius:var(--r);padding:26px;transition:border-color var(--ease),box-shadow var(--ease)}
.seg-card:hover{border-color:var(--tx);box-shadow:0 18px 36px -24px rgba(11,18,32,.4)}
.ico{width:56px;height:56px;border-radius:var(--r);background:var(--ink-900);color:var(--sig);display:flex;align-items:center;justify-content:center}
.ico svg{width:28px;height:28px;stroke:currentColor;stroke-width:1.7;fill:none;stroke-linecap:round;stroke-linejoin:round}
.seg-card h3{margin-bottom:6px}
.seg-card p{font-size:16px;color:var(--tx-3);margin-bottom:14px}
.seg-card .go{display:inline-flex;align-items:center;gap:8px;min-height:44px;margin-top:6px;font-weight:650;font-size:15px;color:var(--tx)}
.seg-card .go:hover{color:var(--blue-l);text-decoration:none}

.topo-card{position:relative;background:#fff;border:1px solid var(--ln);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column}
.topo-card.hot{border-color:var(--tx);box-shadow:0 22px 44px -26px rgba(11,18,32,.45)}
.topo-card .ribbon{position:absolute;top:14px;right:14px;font-family:var(--f-mono);font-size:11.5px;font-weight:600;padding:5px 9px;border-radius:4px;background:var(--sig);color:var(--ink-950)}
.topo-fig{background:var(--ink-900);aspect-ratio:2/1;border-bottom:1px solid var(--ln)}
.topo-fig svg{width:100%;height:100%;display:block}
.topo-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1}
.topo-body .code{font-family:var(--f-mono);font-size:12.5px;color:var(--sig-ink);margin-bottom:6px}
.topo-body h3{margin-bottom:12px}
.topo-body .checkrow li{font-size:15.5px;margin-bottom:8px}
.topo-body .fit{margin:auto 0 0;padding-top:14px;border-top:1px dashed var(--ln);font-size:14px;color:var(--tx-3)}

.svc3{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--ln-d);border:1px solid var(--ln-d);border-radius:var(--r-l);overflow:hidden}
.svc3>div{background:var(--ink-850);padding:26px}
.svc3>div.on{background:linear-gradient(180deg,rgba(124,255,178,.07),rgba(124,255,178,0) 60%),var(--ink-850)}
.svc3 .fig{height:96px;margin-bottom:18px;border:1px solid var(--ln-d);border-radius:var(--r);background:var(--ink-900)}
.svc3 .fig svg{width:100%;height:100%;display:block}
.svc3 h3{font-size:19px;margin-bottom:6px}
.svc3 .k{font-family:var(--f-mono);font-size:12.5px;color:var(--tx-d3);margin-bottom:10px}
.svc3 .on .k{color:var(--sig)}
.svc3 p{font-size:15.5px;color:var(--tx-d2);margin:0}

.track{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(6,1fr);position:relative}
.track::before{content:"";position:absolute;left:0;right:0;top:15px;height:2px;background:linear-gradient(90deg,var(--sig-ink),var(--blue-l))}
.track li{position:relative;margin:0;padding:44px 18px 0 0}
.track li::before{content:"";position:absolute;left:0;top:8px;width:16px;height:16px;border-radius:50%;background:#fff;border:3px solid var(--sig-ink);box-sizing:border-box}
.track li:last-child::before{background:var(--sig-ink)}
.track .code{font-family:var(--f-mono);font-size:12.5px;font-weight:600;color:var(--sig-ink);margin-bottom:6px;display:block}
.track h3{font-size:17px;margin-bottom:6px}
.track p{font-size:14.5px;color:var(--tx-3);margin:0;line-height:1.6}

.carrier{background:#fff;border:1px solid var(--ln);border-radius:var(--r);padding:28px;display:flex;flex-direction:column}
.carrier .cn{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin-bottom:10px}
.carrier .cn b{font-family:var(--f-mono);font-size:26px;letter-spacing:-.03em;color:var(--tx)}
.carrier p{color:var(--tx-3);font-size:16px}
.carrier .fit{margin:auto 0 0;padding-top:14px;border-top:1px dashed var(--ln);font-size:15px;color:var(--tx-2)}
.qs{list-style:none;padding:0;margin:32px 0 0;display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:q}
.qs li{counter-increment:q;margin:0;padding:22px;border-top:2px solid var(--tx);background:#fff}
.qs li::before{content:"0" counter(q);display:block;font-family:var(--f-mono);font-size:12.5px;font-weight:600;color:var(--sig-ink);margin-bottom:8px}
.qs h3{font-size:17px;margin-bottom:6px}
.qs p{font-size:15px;color:var(--tx-3);margin:0}
.cta-panel{margin-top:32px;background:var(--ink-900);border-radius:var(--r-l);padding:34px 38px;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;color:var(--tx-d2)}
.cta-panel h3{color:#fff;margin-bottom:6px}
.cta-panel p{margin:0;max-width:62ch}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
.equip{margin-top:36px;display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.equip .lb{font-family:var(--f-mono);font-size:12.5px;color:var(--tx-3);margin-right:6px}
.equip .n{font-size:14px;font-weight:650;color:var(--tx-2);padding:6px 12px;border:1px solid var(--ln);border-radius:4px;background:#fff}
.equip-note{font-size:13px;color:var(--tx-3);margin:12px 0 0}

.metro{margin:8px 0 36px}
.metro ol{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(6,1fr);position:relative}
.metro ol::before{content:"";position:absolute;left:8%;right:8%;top:23px;height:4px;border-radius:2px;background:linear-gradient(90deg,var(--sig) 0%,var(--sig) 58%,var(--blue) 70%,var(--blue) 100%)}
.metro li{position:relative;margin:0;text-align:center;padding:0 6px}
.metro .pt{position:relative;z-index:1;display:flex;align-items:center;justify-content:center;width:50px;height:50px;margin:0 auto 14px;border-radius:50%;background:var(--ink-900);border:4px solid var(--sig)}
.metro .pt i{width:12px;height:12px;border-radius:50%;background:var(--sig)}
.metro li.hq .pt{background:var(--sig)}
.metro li.hq .pt i{background:var(--ink-950)}
.metro li.far .pt{border-color:var(--blue)}
.metro li.far .pt i{background:var(--blue)}
.metro a.nm{display:inline-block;font-size:17px;font-weight:700;color:#fff!important;padding:4px 0}
.metro a.nm:hover{color:var(--sig)!important;text-decoration:none}
.metro .old{display:block;font-size:13px;color:var(--tx-d3);margin-top:2px;line-height:1.45}
.metro .tm{display:inline-block;font-family:var(--f-mono);font-size:12.5px;color:var(--sig);margin-top:8px}
.metro li.far .tm{color:var(--cyan)}
.legend{display:flex;flex-wrap:wrap;justify-content:center;gap:10px 26px;font-size:14px;color:var(--tx-d2);margin-bottom:28px}
.legend span{display:inline-flex;align-items:center;gap:8px}
.legend i{width:22px;height:4px;border-radius:2px;background:var(--sig)}
.legend i.b{background:var(--blue)}
.kcn{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;list-style:none;padding:0;margin:0}
.kcn li{margin:0;font-size:14px;padding:7px 12px;border:1px solid var(--ln-d2);border-radius:4px;color:var(--tx-d2)}

/* Form */
.lead-wrap{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);border:1px solid var(--ln);border-radius:var(--r-l);overflow:hidden;background:#fff;box-shadow:0 30px 60px -40px rgba(11,18,32,.5)}
.lead-side{background:var(--ink-900);color:var(--tx-d2);padding:40px 36px;display:flex;flex-direction:column}
.lead-side .eyebrow{color:var(--sig)}
.lead-side h2{color:#fff;font-size:clamp(24px,2.4vw,32px);margin-bottom:12px}
.lead-side p{color:var(--tx-d2);font-size:16px}
.lead-side ul{list-style:none;padding:0;margin:4px 0 24px}
.lead-side li{position:relative;padding-left:28px;margin-bottom:10px;font-size:15.5px;color:var(--tx-d)}
.lead-side li::before{content:"";position:absolute;left:2px;top:.5em;width:13px;height:7px;border-left:2px solid var(--sig);border-bottom:2px solid var(--sig);transform:rotate(-45deg)}
.lead-hot{margin-top:auto;border:1px solid var(--ln-d2);border-radius:var(--r);padding:14px 18px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.lead-hot small{display:block;font-family:var(--f-mono);font-size:12px;color:var(--tx-d3)}
.lead-hot a{font-family:var(--f-mono);font-size:26px;font-weight:600;color:#fff!important;letter-spacing:-.02em;min-height:44px;display:inline-flex;align-items:center;text-decoration:none!important}
.lead-hot a:hover{color:var(--sig)!important}
.lead-form{background:#fff;padding:36px}
.lead-form .fld{margin-bottom:14px}
.lead-form label{display:block;font-size:14px;font-weight:600;color:var(--tx);margin-bottom:6px}
.lead-form input[type=text],.lead-form input[type=tel],.lead-form input[type=email],.lead-form select,.lead-form textarea{width:100%;min-height:50px;padding:12px 14px;font:inherit;font-size:16px;line-height:1.5;color:var(--tx);background:#fff;border:1px solid #8A99AE;border-radius:var(--r-s);transition:border-color var(--ease),box-shadow var(--ease)}
.lead-form textarea{min-height:84px;resize:vertical}
.lead-form select{appearance:none;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='9' fill='none'%3E%3Cpath d='M1 1l6 6 6-6' stroke='%230B1220' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 16px center;padding-right:42px}
.lead-form :is(input,select,textarea):focus{outline:none;border-color:var(--ink-900);box-shadow:0 0 0 3px rgba(124,255,178,.6)}
.lead-form .grid-2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.lead-form .consent{display:flex;gap:12px;align-items:flex-start;margin:4px 0 18px}
.lead-form .consent input{width:22px;height:22px;flex:0 0 auto;margin-top:2px;accent-color:var(--ink-900);cursor:pointer}
.lead-form .consent label{font-weight:400;font-size:14px;color:var(--tx-3);line-height:1.6;margin:0;cursor:pointer}
.form-note{font-size:13px;color:var(--tx-3);margin:12px 0 0;text-align:center}
.hp-field{position:absolute!important;left:-9999px!important;top:-9999px!important;width:1px!important;height:1px!important;opacity:0!important}
.ill-msg{padding:13px 16px;border-radius:var(--r-s);margin:0 0 16px;font-size:15px;font-weight:500}
.ill-msg.ok{background:var(--sig-soft);border:1px solid #9BE3BD;color:#064E31}
.ill-msg.err{background:#FDECEC;border:1px solid #F3A9A9;color:#7F1D1D}
.flash{animation:flash 1.6s ease}
@keyframes flash{0%{box-shadow:0 0 0 4px rgba(124,255,178,.9)}100%{box-shadow:0 0 0 0 rgba(124,255,178,0)}}
#leadform,#leadform-side,#bao-gia-form{scroll-margin-top:calc(var(--header-h-min) + 20px)}

.cta-band{position:relative;overflow:hidden;background:var(--ink-900);color:var(--tx-d2);padding:88px 0 110px;isolation:isolate}
.cta-band .wrap{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap}
.cta-band h2{color:#fff;margin-bottom:10px;max-width:24ch}
.cta-band p{margin:0;max-width:60ch;font-size:17.5px}
.cta-band .fiber{height:90px;opacity:.8}
.ill-legalnote{font-size:13.5px;line-height:1.75;color:var(--tx-3);border:1px dashed var(--ln-2);border-radius:var(--r);padding:18px 22px}
.ill-legalnote strong{color:var(--tx)}
.ill-legalnote p{margin:0}

/* =========================================================
   7. TRANG CON
   ========================================================= */
.page-hero{position:relative;overflow:hidden;background:var(--ink-900);color:var(--tx-d2);padding:44px 0 56px;isolation:isolate;border-bottom:1px solid var(--ln-d)}
.page-hero h1{color:#fff;font-size:clamp(28px,3.8vw,46px);margin-bottom:14px;max-width:26ch}
.page-hero p{font-size:18px;color:var(--tx-d2);max-width:68ch;margin:0 0 24px}
.ph-actions{display:flex;gap:12px;flex-wrap:wrap}
.page-hero .btn-call-lite{background:transparent;color:#fff;border-color:rgba(255,255,255,.34)}
.page-hero .btn-call-lite:hover{border-color:#fff;color:#fff}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;font-family:var(--f-mono);font-size:12.5px;color:var(--tx-d3);margin-bottom:16px}
.crumbs a{color:var(--tx-d2)!important;display:inline-block;padding:6px 0}
.crumbs a:hover{color:var(--sig)!important;text-decoration:none}
.crumbs span+span::before{content:"/";margin:0 10px;color:var(--tx-d3)}
.crumbs span:last-child{color:var(--sig)}
.entry{background:#fff;padding:56px 0 80px}
.entry-grid{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:64px;align-items:start}
.entry-content{min-width:0;max-width:760px;font-size:17.5px;line-height:1.75;color:var(--tx-2);counter-reset:h2}
.entry-content>h2{position:relative;margin:56px 0 18px;padding-top:22px;border-top:1px solid var(--ln);counter-increment:h2}
.entry-content>h2::before{content:counter(h2,decimal-leading-zero);display:block;font-family:var(--f-mono);font-size:12.5px;font-weight:600;color:var(--sig-ink);margin-bottom:8px}
.entry-content>h2.no-toc::before{display:none}
.entry-content h3{margin:32px 0 10px}
.entry-content p{margin-bottom:22px}
.entry-content strong{color:var(--tx)}
.entry-content p a,.entry-content li a{text-decoration:underline;text-decoration-color:#9DB9EA;text-underline-offset:3px;text-decoration-thickness:1.5px}
.entry-content p a:hover,.entry-content li a:hover{text-decoration-color:var(--tx)}
.entry-content>ul{list-style:none;padding-left:0;margin:24px 0}
.entry-content>ul>li{position:relative;padding-left:26px;margin-bottom:12px}
.entry-content>ul>li::before{content:"";position:absolute;left:3px;top:.8em;width:10px;height:2px;background:var(--sig-ink)}
.entry-content>ol{list-style:none;padding-left:0;counter-reset:n;margin:24px 0}
.entry-content>ol>li{position:relative;padding-left:50px;margin-bottom:14px;counter-increment:n}
.entry-content>ol>li::before{content:counter(n,decimal-leading-zero);position:absolute;left:0;top:2px;font-family:var(--f-mono);font-size:12.5px;font-weight:600;color:var(--sig-ink);border:1px solid #B7EFD0;background:var(--sig-soft);border-radius:4px;padding:2px 6px;line-height:1.4}
.entry-content .grid-2,.entry-content .grid-3,.entry-content .grid-4{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px;margin:24px 0}
.entry-content .card{padding:22px}
.entry-content .card p{font-size:15.5px}
.entry-content .faq{max-width:none}
.ill-updated{font-family:var(--f-mono);font-size:12.5px;color:var(--tx-3);margin:0 0 20px!important}
.ill-key{background:var(--ink-900);color:var(--tx-d2);border-radius:var(--r);padding:24px 26px;margin:0 0 32px}
.ill-key .k-label{display:flex;align-items:center;gap:10px;font-family:var(--f-mono);font-size:12.5px!important;font-weight:600;color:var(--sig);margin:0 0 12px!important}
.ill-key .k-label::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--sig);box-shadow:0 0 10px var(--sig)}
.ill-key p{font-size:16.5px;line-height:1.72;color:var(--tx-d2);margin:0}
.ill-key p+p{margin-top:12px}
.ill-key strong{color:#fff}
.ill-key a{color:var(--cyan)!important;text-decoration-color:rgba(111,211,255,.5)!important}
.ill-toc{border:1px solid var(--ln);border-radius:var(--r);padding:20px 24px;margin:0 0 36px;background:var(--paper)}
.ill-toc .toc-h{font-family:var(--f-mono);font-size:12.5px;font-weight:600;color:var(--tx-3);margin:0 0 8px!important}
.ill-toc ol{margin:0;padding:0;list-style:none;columns:2;column-gap:32px;counter-reset:t}
.ill-toc li{counter-increment:t;margin:0;break-inside:avoid;font-size:15px;line-height:1.5}
.ill-toc a{display:flex;gap:10px;padding:7px 0;color:var(--tx-2);text-decoration:none!important}
.ill-toc a::before{content:counter(t,decimal-leading-zero);font-family:var(--f-mono);font-size:12px;color:var(--sig-ink);padding-top:2px}
.ill-toc a:hover{color:var(--blue-l)}
.entry-content [id]{scroll-margin-top:calc(var(--header-h-min) + 16px)}

.sidebar{position:sticky;top:calc(var(--header-h-min) + 24px)}
.admin-bar .sidebar{top:calc(var(--header-h-min) + 56px)}
.side-hot{background:var(--ink-900);color:var(--tx-d2);border-radius:var(--r);padding:22px;margin-bottom:18px}
.side-hot h4{display:flex;align-items:center;gap:10px;margin-bottom:4px;font-family:var(--f-mono);font-size:12.5px;font-weight:600;color:var(--sig)}
.side-hot h4::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--sig);animation:pulse 2.4s infinite}
.side-hot a.hot{display:block;margin-bottom:6px;color:#fff!important;font-family:var(--f-mono);font-size:28px;font-weight:600;letter-spacing:-.03em;line-height:1.3;text-decoration:none!important}
.side-hot a.hot:hover{color:var(--sig)!important}
.side-hot p{font-size:14px;line-height:1.6;margin-bottom:14px;color:var(--tx-d2)}
.side-box{background:#fff;border:1px solid var(--ln);border-radius:var(--r);padding:22px;margin-bottom:18px}
.side-box h3{font-size:19px;margin-bottom:4px}
.side-box h4{font-family:var(--f-mono);font-size:12.5px;font-weight:600;color:var(--tx-3);margin-bottom:8px}
.side-box ul{list-style:none;padding:0;margin:0}
.side-box li{margin:0;font-size:15px;line-height:1.5;border-top:1px dashed var(--ln)}
.side-box li:first-child{border-top:0}
.side-box li a{display:inline-block;padding:9px 0;color:var(--tx-2)}
.side-box li a:hover{color:var(--blue-l)}
.side-box .lead-form{padding:0;border:0}
.side-box .lead-form .grid-2{grid-template-columns:1fr;gap:0}
.side-box .side-sub{color:var(--tx-3);font-size:14.5px;margin-bottom:16px}
.post-list article{border-bottom:1px solid var(--ln);padding:18px 0}
.post-list h2{font-size:22px;margin:0 0 6px}

/* =========================================================
   8. CHÂN TRANG
   ========================================================= */
.site-footer{position:relative;background:var(--ink-950);color:var(--tx-d2);padding:72px 0 28px;font-size:15px;border-top:1px solid var(--ln-d)}
.site-footer h4{color:#fff;font-family:var(--f-mono);font-size:12.5px;font-weight:600;margin-bottom:16px}
.site-footer a{color:var(--tx-d2);display:inline-block;padding-block:4px}
.site-footer a:hover{color:var(--sig);text-decoration:none}
.site-footer strong{color:#fff}
.site-footer p{margin-bottom:.9em;line-height:1.7}
.foot-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.3fr;gap:44px;padding-bottom:40px}
.foot-grid ul{list-style:none;padding:0;margin:0}
.foot-grid li{margin:0 0 4px;line-height:1.5}
.foot-brand .brand{margin-bottom:18px}
.foot-status{display:grid;gap:10px;border:1px solid var(--ln-d2);border-radius:var(--r);padding:16px 18px;font-family:var(--f-mono);font-size:13px;margin-bottom:16px}
.foot-status div{display:flex;align-items:center;gap:10px;justify-content:space-between}
.foot-status span{display:inline-flex;align-items:center;gap:9px}
.foot-status b{color:#fff;font-weight:600}
.site-footer .btn-sig{color:var(--ink-950)}
.ill-disclaimer{border-top:1px solid var(--ln-d);padding:22px 0 8px;display:grid;grid-template-columns:1fr 1fr;gap:4px 52px;font-size:13.5px;line-height:1.75;color:var(--tx-d3)}
.ill-disclaimer h5{grid-column:1/-1;margin:0 0 10px;font-family:var(--f-mono);font-size:12.5px;font-weight:600;color:var(--amber)}
.ill-disclaimer p{margin:0 0 12px}
.ill-disclaimer p:last-child{grid-column:1/-1}
.ill-disclaimer strong{color:var(--tx-d2);font-weight:600}
.ill-disclaimer a{color:var(--cyan);text-decoration:underline}
.foot-bottom{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:10px 32px;margin-top:18px;padding-top:18px;border-top:1px solid var(--ln-d);font-family:var(--f-mono);font-size:12.5px;color:var(--tx-d3);line-height:1.8}
.fb-links{display:flex;flex-wrap:wrap;gap:4px 24px}
.callbar{display:none}
.callbar a{flex:1;display:flex;align-items:center;justify-content:center;gap:8px;height:58px;padding:0 10px;font-weight:700;font-size:15.5px;text-align:center;line-height:1.25;text-decoration:none!important}
.callbar .c1{background:var(--sig);color:var(--ink-950);flex:1.4}
.callbar .c1::before{content:"";width:17px;height:17px;background:currentColor;-webkit-mask:var(--ic-phone) center/contain no-repeat;mask:var(--ic-phone) center/contain no-repeat}
.callbar .c2{background:var(--ink-900);color:#fff;border-top:1px solid var(--ln-d2)}

/* =========================================================
   9. RESPONSIVE
   ========================================================= */
@media (max-width:1199.98px){
  .track{grid-template-columns:repeat(3,1fr);row-gap:36px}
  .track::before{display:none}
  .track li{border-top:2px solid var(--sig-ink);padding-top:30px}
  .track li::before{top:-9px}
  .metro ol{grid-template-columns:repeat(3,1fr);row-gap:28px}
  .metro ol::before{display:none}
}
@media (max-width:1023.98px){
  .sec{padding:72px 0}
  .hero{padding:48px 0 116px}
  .hero-grid,.split,.tools{grid-template-columns:1fr;gap:40px}
  .split .sticky{position:static}
  .strip .wrap{grid-template-columns:1fr;gap:22px}
  .kpis{grid-template-columns:repeat(2,1fr);border-left:0;gap:18px 0}
  .kpis div{border-right:0;border-left:1px solid var(--ln-d)}
  .g4{grid-template-columns:repeat(2,1fr)}
  .g3,.qs{grid-template-columns:1fr 1fr}
  .svc3{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .entry-grid{grid-template-columns:minmax(0,1fr);gap:40px}
  .sidebar{position:static}
  .lead-wrap{grid-template-columns:1fr}
}
@media (max-width:899.98px){.ill-disclaimer{grid-template-columns:1fr}}
@media (max-width:767.98px){
  .g2,.g3,.qs,.segs,.vs{grid-template-columns:1fr}
  .vs-col{padding:26px 22px}
  .ill-toc ol{columns:1}
  .cta-panel{padding:28px 24px}
}
@media (max-width:639.98px){
  body{font-size:16.5px;padding-bottom:58px}
  html,body{overflow-x:hidden}
  .wrap{padding:0 18px}
  .topbar{display:none}
  .sec{padding:56px 0}.sec-sm{padding:40px 0}
  .sec-head{margin-bottom:32px}
  .sec-head p,.lede{font-size:16.5px}
  .hero{padding:36px 0 100px}
  .hero-lead{font-size:17px}
  .btn{white-space:normal;text-align:center;padding:12px 18px;min-height:50px}
  .hero-actions .btn,.cta-actions .btn,.ph-actions .btn,.t-act .btn{width:100%}
  .g4{grid-template-columns:1fr}
  .c-bar{grid-template-columns:80px 1fr 48px}
  .idx-list li{grid-template-columns:44px 1fr;gap:12px}
  .t-grid{grid-template-columns:1fr}
  .tool{padding:22px 18px}
  .seg-card{grid-template-columns:1fr;padding:22px}
  .track{grid-template-columns:1fr;row-gap:0}
  .track li{border-top:0;border-left:2px solid var(--sig-ink);padding:0 0 26px 26px;margin-left:8px}
  .track li::before{left:-9px;top:2px}
  .track li:last-child{border-left-color:transparent}
  .metro ol{grid-template-columns:1fr 1fr}
  .vs-rows>div{grid-template-columns:1fr;gap:2px}
  .lead-side,.lead-form{padding:26px 20px}
  .lead-form .grid-2{grid-template-columns:1fr;gap:0}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px 18px}
  .foot-grid>:first-child,.foot-grid>:last-child{grid-column:1/-1}
  .foot-grid li a,.fb-links a{min-height:44px;padding:11px 0;display:inline-flex;align-items:center}
  .callbar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:80;padding-bottom:env(safe-area-inset-bottom);background:var(--ink-900)}
  .page-hero{padding:28px 0 36px}
  .page-hero p{font-size:16.5px}
  .crumbs{flex-wrap:nowrap;overflow:hidden;white-space:nowrap}
  .crumbs span:last-child{overflow:hidden;text-overflow:ellipsis;min-width:0}
  .entry{padding:36px 0 56px}
  .entry-content{font-size:16.5px}
  .entry-content>h2{margin-top:44px}
  .ill-key{padding:20px}
  .ill-just{text-align:left}
  .sec-head.center p{text-align:left}
  .cta-band{padding:60px 0 90px}
}
@media (max-width:400px){.wrap{padding:0 15px}.brand-txt .wm{font-size:15px}.metro ol{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){*,::before,::after{animation:none!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}

/* =========================================================
   10. BLOG (3.1.0)
   ========================================================= */
.post-meta{display:flex;flex-wrap:wrap;gap:6px 18px;font-family:var(--f-mono);font-size:12.5px;color:var(--tx-d3);margin:0 0 12px!important}
.post-meta span:first-child{color:var(--sig)}
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.post-card{position:relative;background:#fff;border:1px solid var(--ln);border-radius:var(--r);padding:26px 24px 22px;display:flex;flex-direction:column;transition:border-color var(--ease),box-shadow var(--ease)}
.post-card:hover{border-color:var(--tx);box-shadow:0 18px 36px -24px rgba(11,18,32,.4)}
.post-card .pc-n{font-family:var(--f-mono);font-size:12.5px;font-weight:600;color:var(--sig-ink);margin-bottom:10px}
.post-card h2{font-size:19px;line-height:1.35;margin:0 0 10px}
.post-card h2 a{color:var(--tx);text-decoration:none}
.post-card h2 a::after{content:"";position:absolute;inset:0}
.post-card h2 a:hover{color:var(--blue-l)}
.post-card p{font-size:15px;color:var(--tx-3);margin:0 0 14px}
.post-card .pc-meta{margin-top:auto;margin-bottom:0;padding-top:12px;border-top:1px dashed var(--ln);font-family:var(--f-mono);font-size:12px}
.pagination,.nav-links{display:flex;gap:8px;justify-content:center;margin-top:36px;font-family:var(--f-mono)}
.nav-links a,.nav-links span{display:inline-flex;align-items:center;justify-content:center;min-width:44px;min-height:44px;padding:0 12px;border:1px solid var(--ln);border-radius:var(--r-s);color:var(--tx)}
.nav-links .current{background:var(--ink-900);color:#fff;border-color:var(--ink-900)}
.related{margin-top:48px;padding-top:24px;border-top:1px solid var(--ln)}
.related h2{margin:0 0 12px;font-size:22px}
.rel-list{list-style:none;margin:0;padding:0}
.rel-list li{border-bottom:1px dashed var(--ln);margin:0}
.rel-list a{display:flex;gap:10px;padding:12px 0;color:var(--tx);font-weight:600;text-decoration:none!important}
.rel-list a::before{content:"→";font-family:var(--f-mono);color:var(--sig-ink)}
.rel-list a:hover{color:var(--blue-l)}
.entry-content .formula{font-family:var(--f-mono);font-size:15px;background:var(--ink-900);color:var(--tx-d);border-radius:var(--r);padding:16px 20px;margin:20px 0;overflow-x:auto;line-height:1.7}
.entry-content .formula b{color:var(--sig)}
@media (max-width:1023.98px){.post-grid{grid-template-columns:1fr 1fr}}
@media (max-width:639.98px){.post-grid{grid-template-columns:1fr}}