.elementor-11839 .elementor-element.elementor-element-4d2156a{--display:flex;}/* Start custom CSS for html, class: .elementor-element-3ecd26f */.atl-lithium-article{
  --atl-bg:#F5F7FA;
  --atl-surface:#FFFFFF;
  --atl-ink:#101B2D;
  --atl-ink-soft:#4A5568;
  --atl-primary:#1B3A6B;
  --atl-primary-dark:#12294D;
  --atl-primary-soft:#E8EEF7;
  --atl-amber:#C97C1F;
  --atl-amber-soft:#FCEEDD;
  --atl-danger:#B23A3A;
  --atl-danger-soft:#FBEAEA;
  --atl-success:#1B7A6B;
  --atl-success-soft:#E6F3F1;
  --atl-border:#E1E6ED;
  --atl-line:#CBD5E1;
  --atl-radius:10px;
  --atl-font-display:'Be Vietnam Pro', 'Segoe UI', sans-serif;
  --atl-font-body:'Inter', 'Segoe UI', sans-serif;
  --atl-font-mono:'IBM Plex Mono', 'Courier New', monospace;

  background:var(--atl-bg);
  color:var(--atl-ink);
  font-family:var(--atl-font-body);
  line-height:1.65;
  font-size:16px;
  position:relative;
  max-width:1280px;
  margin:0 auto;
  padding:0 0 40px;
  box-sizing:border-box;
}
.atl-lithium-article *{ box-sizing:border-box; }
.atl-lithium-article a{ color:var(--atl-primary); text-decoration:none; }
.atl-lithium-article img{ max-width:100%; }

/* progress bar */
.atl-lithium-article .atl-progress-track{
  position:sticky; top:0; z-index:40; height:4px; width:100%;
  background:var(--atl-border);
}
.atl-lithium-article .atl-progress-fill{
  height:100%; width:0%; background:linear-gradient(90deg,var(--atl-primary),var(--atl-amber));
  transition:width .1s linear;
}

/* diamond signature element (Class 9 placard motif) */
.atl-lithium-article .atl-diamond{
  display:inline-flex; align-items:center; justify-content:center;
  width:28px; height:28px; min-width:28px;
  transform:rotate(45deg);
  border-radius:4px;
  background:var(--atl-primary);
  box-shadow:inset 0 0 0 2px rgba(255,255,255,.35);
}
.atl-lithium-article .atl-diamond span{
  transform:rotate(-45deg);
  font-family:var(--atl-font-mono);
  font-weight:700; font-size:12px; color:#fff; line-height:1;
}
.atl-lithium-article .atl-diamond--amber{ background:var(--atl-amber); }
.atl-lithium-article .atl-diamond--primary{ background:var(--atl-primary); }
.atl-lithium-article .atl-diamond--success{ background:var(--atl-success); }
.atl-lithium-article .atl-diamond--danger{ background:var(--atl-danger); }

/* TOC toggle (mobile) */
.atl-lithium-article .atl-toc-toggle{
  display:none;
  width:100%;
  margin:16px 16px 0;
  padding:12px 16px;
  background:var(--atl-surface);
  border:1px solid var(--atl-border);
  border-radius:var(--atl-radius);
  font-family:var(--atl-font-display);
  font-weight:600;
  font-size:14px;
  color:var(--atl-primary-dark);
  cursor:pointer;
  align-items:center; gap:8px;
}

/* layout: sidebar + content */
.atl-lithium-article{
  display:grid;
  grid-template-columns:260px 1fr;
  gap:32px;
  align-items:start;
}
.atl-lithium-article .atl-progress-track{ grid-column:1/-1; }
.atl-lithium-article .atl-toc-toggle{ grid-column:1/-1; }

.atl-lithium-article .atl-toc{
  position:sticky; top:16px;
  align-self:start;
  background:var(--atl-surface);
  border:1px solid var(--atl-border);
  border-radius:var(--atl-radius);
  padding:18px 16px;
  margin:24px 0 0 16px;
  max-height:calc(100vh - 32px);
  overflow-y:auto;
}
.atl-lithium-article .atl-toc-head{
  font-family:var(--atl-font-display);
  font-weight:700; font-size:13px;
  text-transform:uppercase; letter-spacing:.06em;
  color:var(--atl-ink-soft);
  margin-bottom:10px;
}
.atl-lithium-article .atl-toc-list{
  list-style:none; margin:0; padding:0;
  display:flex; flex-direction:column; gap:2px;
}
.atl-lithium-article .atl-toc-link{
  display:block;
  padding:8px 10px;
  border-radius:6px;
  font-size:13.5px;
  color:var(--atl-ink-soft);
  border-left:3px solid transparent;
}
.atl-lithium-article .atl-toc-link:hover{ background:var(--atl-primary-soft); color:var(--atl-primary-dark); }
.atl-lithium-article .atl-toc-link.atl-active{
  background:var(--atl-primary-soft);
  color:var(--atl-primary-dark);
  border-left-color:var(--atl-amber);
  font-weight:600;
}

.atl-lithium-article .atl-content{
  min-width:0;
  margin:24px 16px 0 0;
}

/* hero */
.atl-lithium-article .atl-hero{
  background:linear-gradient(135deg,var(--atl-primary-dark),var(--atl-primary));
  color:#fff;
  border-radius:16px;
  padding:36px 32px;
  margin-bottom:36px;
}
.atl-lithium-article .atl-hero-badge{
  display:inline-flex; align-items:center; gap:10px;
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.25);
  border-radius:999px;
  padding:6px 14px 6px 10px;
  font-size:12.5px; font-weight:600; letter-spacing:.02em;
  margin-bottom:18px;
}
.atl-lithium-article .atl-hero-title{
  font-family:var(--atl-font-display);
  font-size:clamp(22px, 3vw, 32px);
  line-height:1.28;
  font-weight:700;
  margin:0 0 14px;
  max-width:820px;
}
.atl-lithium-article .atl-hero-lede{
  font-size:16px;
  color:rgba(255,255,255,.88);
  max-width:720px;
  margin:0 0 26px;
}
.atl-lithium-article .atl-hero-stats{
  display:flex; flex-wrap:wrap; gap:14px;
}
.atl-lithium-article .atl-hero-stat{
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.2);
  border-radius:10px;
  padding:14px 18px;
  min-width:180px;
  flex:1 1 180px;
}
.atl-lithium-article .atl-hero-stat-num{
  display:block;
  font-family:var(--atl-font-display);
  font-size:24px; font-weight:700; color:var(--atl-amber);
}
.atl-lithium-article .atl-hero-stat-label{
  display:block; font-size:12.5px; color:rgba(255,255,255,.75); margin-top:4px;
}

/* sections */
.atl-lithium-article .atl-section{
  background:var(--atl-surface);
  border:1px solid var(--atl-border);
  border-radius:14px;
  padding:32px 32px 8px;
  margin-bottom:28px;
  scroll-margin-top:20px;
}
.atl-lithium-article .atl-section h2{
  font-family:var(--atl-font-display);
  font-size:clamp(19px,2.2vw,25px);
  font-weight:700;
  color:var(--atl-primary-dark);
  line-height:1.35;
  margin:0 0 18px;
  padding-bottom:14px;
  border-bottom:2px solid var(--atl-border);
}
.atl-lithium-article .atl-section h3{
  font-family:var(--atl-font-display);
  font-size:17.5px; font-weight:700;
  color:var(--atl-ink);
  margin:26px 0 10px;
}
.atl-lithium-article .atl-section h4{
  font-family:var(--atl-font-display);
  font-size:15.5px; font-weight:700;
  color:var(--atl-ink);
  margin:18px 0 8px;
}
.atl-lithium-article .atl-section p{ margin:0 0 14px; color:var(--atl-ink); }
.atl-lithium-article .atl-list{ margin:0 0 16px; padding-left:20px; }
.atl-lithium-article .atl-list li{ margin-bottom:8px; }

/* alert box */
.atl-lithium-article .atl-alert{
  display:flex; gap:14px;
  border-radius:10px; padding:16px 18px; margin:18px 0;
}
.atl-lithium-article .atl-alert--warning{ background:var(--atl-amber-soft); border:1px solid #EBD3A6; }
.atl-lithium-article .atl-alert--danger{ background:var(--atl-danger-soft); border:1px solid #E9BEBE; }
.atl-lithium-article .atl-alert-icon{ flex-shrink:0; padding-top:2px; }
.atl-lithium-article .atl-alert-title{ font-weight:700; margin:0 0 4px; }
.atl-lithium-article .atl-alert-body p:last-child{ margin-bottom:0; }

/* tip box */
.atl-lithium-article .atl-tip{
  display:flex; gap:14px;
  background:var(--atl-success-soft);
  border:1px solid #BFE0D9;
  border-radius:10px; padding:16px 18px; margin:18px 0;
}
.atl-lithium-article .atl-tip-icon{ font-size:20px; }
.atl-lithium-article .atl-tip-title{ font-weight:700; margin:0 0 4px; color:var(--atl-success); }
.atl-lithium-article .atl-tip-body p:last-child{ margin-bottom:0; }

/* callout / highlight */
.atl-lithium-article .atl-callout{
  border-left:4px solid var(--atl-primary);
  background:var(--atl-primary-soft);
  border-radius:0 8px 8px 0;
  padding:14px 18px; margin:20px 0;
}
.atl-lithium-article .atl-callout p{ margin:0; }
.atl-lithium-article .atl-highlight{
  background:var(--atl-amber-soft);
  border:1px dashed var(--atl-amber);
  border-radius:10px;
  padding:16px 18px; margin:20px 0;
  font-weight:600;
}
.atl-lithium-article .atl-highlight p{ margin:0; }

/* checklist box */
.atl-lithium-article .atl-checklist{
  display:grid; gap:14px;
  grid-template-columns:repeat(2,1fr);
  margin:16px 0 24px;
}
.atl-lithium-article .atl-checklist-item{
  display:flex; gap:12px;
  background:var(--atl-bg);
  border:1px solid var(--atl-border);
  border-radius:10px;
  padding:14px 16px;
}
.atl-lithium-article .atl-checklist-item .atl-diamond{ flex-shrink:0; margin-top:2px; }
.atl-lithium-article .atl-checklist-title{ font-weight:700; margin:0 0 4px; }
.atl-lithium-article .atl-checklist-item p:last-child{ margin-bottom:0; font-size:14.5px; color:var(--atl-ink-soft); }

/* timeline */
.atl-lithium-article .atl-timeline{
  position:relative;
  margin:18px 0 26px;
  padding-left:8px;
}
.atl-lithium-article .atl-timeline::before{
  content:"";
  position:absolute; left:23px; top:6px; bottom:6px; width:2px;
  background:var(--atl-line);
}
.atl-lithium-article .atl-timeline-item{
  position:relative;
  display:flex; gap:18px;
  padding:0 0 26px;
}
.atl-lithium-article .atl-timeline-item:last-child{ padding-bottom:0; }
.atl-lithium-article .atl-timeline-marker{ position:relative; z-index:1; flex-shrink:0; }
.atl-lithium-article .atl-timeline-title{ font-weight:700; margin:2px 0 4px; }
.atl-lithium-article .atl-timeline-content p:last-child{ margin-bottom:0; color:var(--atl-ink-soft); font-size:14.5px; }

/* comparison box */
.atl-lithium-article .atl-compare{
  display:grid; grid-template-columns:1fr 1fr; gap:16px;
  margin:16px 0 24px;
}
.atl-lithium-article .atl-compare-col{
  border-radius:10px; padding:18px;
  border:1px solid var(--atl-border);
}
.atl-lithium-article .atl-compare-col--yes{ background:var(--atl-success-soft); border-color:#BFE0D9; }
.atl-lithium-article .atl-compare-col--no{ background:var(--atl-danger-soft); border-color:#E9BEBE; }
.atl-lithium-article .atl-compare-head{
  display:flex; align-items:center; gap:10px;
  font-weight:700; font-size:15.5px; margin-bottom:12px;
}
.atl-lithium-article .atl-compare-icon{
  width:24px; height:24px; border-radius:50%;
  display:inline-flex; align-items:center; justify-content:center;
  color:#fff; font-size:13px; flex-shrink:0;
}
.atl-lithium-article .atl-compare-icon--yes{ background:var(--atl-success); }
.atl-lithium-article .atl-compare-icon--no{ background:var(--atl-danger); }
.atl-lithium-article .atl-compare-col ul{ margin:0; padding-left:18px; }
.atl-lithium-article .atl-compare-col li{ margin-bottom:8px; font-size:14.5px; }

/* process flow */
.atl-lithium-article .atl-flow{
  display:flex; flex-wrap:wrap; align-items:stretch; gap:10px;
  margin:16px 0 24px;
}
.atl-lithium-article .atl-flow-step{
  flex:1 1 160px;
  background:var(--atl-bg);
  border:1px solid var(--atl-border);
  border-radius:10px;
  padding:16px 14px;
  text-align:center;
}
.atl-lithium-article .atl-flow-num{
  display:inline-flex; align-items:center; justify-content:center;
  width:26px; height:26px; border-radius:50%;
  background:var(--atl-primary); color:#fff;
  font-weight:700; font-size:13px; margin-bottom:8px;
}
.atl-lithium-article .atl-flow-step p{ margin:0; font-size:13.5px; }
.atl-lithium-article .atl-flow-arrow{
  display:flex; align-items:center; justify-content:center;
  color:var(--atl-line); font-size:18px; flex:0 0 auto;
}

/* quote box */
.atl-lithium-article .atl-quote{
  border-left:4px solid var(--atl-amber);
  background:var(--atl-amber-soft);
  border-radius:0 8px 8px 0;
  padding:16px 20px; margin:20px 0;
  font-style:italic; font-size:15.5px;
}
.atl-lithium-article .atl-quote p{ margin:0; }

/* case study box */
.atl-lithium-article .atl-case{
  background:var(--atl-bg);
  border:1px solid var(--atl-border);
  border-radius:12px;
  padding:22px 24px 6px;
  margin-top:10px;
}
.atl-lithium-article .atl-case h3{ margin-top:20px; }
.atl-lithium-article .atl-case h3:first-child{ margin-top:0; }

/* tables */
.atl-lithium-article .atl-table-wrap{ overflow-x:auto; margin:12px 0 22px; }
.atl-lithium-article .atl-table{
  width:100%; border-collapse:collapse;
  font-size:14.5px;
}
.atl-lithium-article .atl-table th,
.atl-lithium-article .atl-table td{
  border:1px solid var(--atl-border);
  padding:10px 14px; text-align:left; vertical-align:top;
}
.atl-lithium-article .atl-table thead th{
  background:var(--atl-primary-dark); color:#fff; font-family:var(--atl-font-display);
  font-weight:600; font-size:13.5px;
}
.atl-lithium-article .atl-table tbody tr:nth-child(even){ background:var(--atl-bg); }
.atl-lithium-article .atl-check-mark{ font-size:16px; color:var(--atl-ink-soft); }

/* FAQ accordion (details/summary) */
.atl-lithium-article .atl-faq{ display:flex; flex-direction:column; gap:10px; margin-top:12px; }
.atl-lithium-article .atl-faq-item{
  border:1px solid var(--atl-border);
  border-radius:10px;
  background:var(--atl-bg);
  padding:2px 4px;
}
.atl-lithium-article .atl-faq-item summary{
  cursor:pointer; list-style:none;
  padding:14px 16px;
  font-weight:600; font-size:15px;
  display:flex; align-items:center; justify-content:space-between;
  gap:10px;
}
.atl-lithium-article .atl-faq-item summary::-webkit-details-marker{ display:none; }
.atl-lithium-article .atl-faq-item summary::after{
  content:"+";
  font-size:20px; font-weight:400; color:var(--atl-primary);
  flex-shrink:0;
}
.atl-lithium-article .atl-faq-item[open] summary::after{ content:"–"; }
.atl-lithium-article .atl-faq-content{ padding:0 16px 16px; }
.atl-lithium-article .atl-faq-content p{ margin:0; color:var(--atl-ink-soft); font-size:14.5px; }

/* tagline */
.atl-lithium-article .atl-tagline{
  font-family:var(--atl-font-display);
  font-weight:700; font-size:18px;
  color:var(--atl-primary-dark);
  text-align:center;
  padding:16px 0;
}

/* freecheck box */
.atl-lithium-article .atl-freecheck{
  display:flex; gap:16px; align-items:flex-start;
  background:linear-gradient(135deg,var(--atl-amber-soft),#fff);
  border:1px solid #EBD3A6;
  border-radius:12px;
  padding:20px 22px; margin:20px 0 28px;
}
.atl-lithium-article .atl-freecheck-title{ font-weight:700; font-size:16px; margin:0 0 6px; }
.atl-lithium-article .atl-freecheck-body p:last-child{ margin-bottom:0; color:var(--atl-ink-soft); font-size:14.5px; }

/* final cta */
.atl-lithium-article .atl-cta-final{
  background:var(--atl-primary-dark);
  border-radius:14px;
  padding:30px 28px;
  color:#fff;
  margin-bottom:14px;
}
.atl-lithium-article .atl-cta-heading{
  font-family:var(--atl-font-display);
  color:#fff; font-size:19px; margin:0 0 20px; border:none; padding:0;
  text-align:center;
}
.atl-lithium-article .atl-contact-cards{
  display:grid; grid-template-columns:1fr 1fr; gap:16px; margin-bottom:24px;
}
.atl-lithium-article .atl-contact-card{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.18);
  border-radius:10px;
  padding:18px;
}
.atl-lithium-article .atl-contact-name{ font-weight:700; font-size:15.5px; margin:0 0 4px; }
.atl-lithium-article .atl-contact-role{ font-size:13px; color:rgba(255,255,255,.7); margin:0 0 14px; }
.atl-lithium-article .atl-contact-actions{ display:flex; flex-wrap:wrap; gap:8px; margin-bottom:10px; }
.atl-lithium-article .atl-contact-meta{ font-size:12.5px; color:rgba(255,255,255,.6); margin:0; }

.atl-lithium-article .atl-btn{
  display:inline-flex; align-items:center; gap:6px;
  padding:9px 14px; border-radius:8px;
  font-size:13.5px; font-weight:600;
  border:1px solid transparent; cursor:pointer;
}
.atl-lithium-article .atl-btn--primary{ background:var(--atl-amber); color:#fff; }
.atl-lithium-article .atl-btn--zalo{ background:#0068FF; color:#fff; }
.atl-lithium-article .atl-btn--outline{ background:transparent; border-color:rgba(255,255,255,.4); color:#fff; }

.atl-lithium-article .atl-form{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.18);
  border-radius:10px;
  padding:22px;
}
.atl-lithium-article .atl-form-title{ font-weight:700; font-size:15.5px; margin:0 0 14px; }
.atl-lithium-article .atl-form-row{ margin-bottom:14px; }
.atl-lithium-article .atl-form-row label{ display:block; font-size:13px; margin-bottom:6px; color:rgba(255,255,255,.8); }
.atl-lithium-article .atl-form-row input,
.atl-lithium-article .atl-form-row textarea{
  width:100%; padding:10px 12px;
  border-radius:8px; border:1px solid rgba(255,255,255,.25);
  background:rgba(255,255,255,.94); color:var(--atl-ink);
  font-family:var(--atl-font-body); font-size:14px;
  resize:vertical;
}
.atl-lithium-article .atl-form-submit{ margin-top:4px; }
.atl-lithium-article .atl-form-note{
  margin:10px 0 0; font-size:13px; color:var(--atl-amber); min-height:16px;
}

/* tablet */
@media (max-width:1000px){
  .atl-lithium-article{ grid-template-columns:1fr; }
  .atl-lithium-article .atl-toc-toggle{ display:flex; }
  .atl-lithium-article .atl-toc{
    display:none;
    position:fixed; top:0; left:0; right:0; bottom:0;
    z-index:50; margin:0; max-height:none;
    border-radius:0; overflow-y:auto;
    padding:20px;
  }
  .atl-lithium-article .atl-toc.atl-toc-open{ display:block; }
  .atl-lithium-article .atl-content{ margin:16px 16px 0; }
  .atl-lithium-article .atl-checklist{ grid-template-columns:1fr; }
  .atl-lithium-article .atl-compare{ grid-template-columns:1fr; }
  .atl-lithium-article .atl-contact-cards{ grid-template-columns:1fr; }
}

@media (max-width:640px){
  .atl-lithium-article{ font-size:15px; }
  .atl-lithium-article .atl-hero{ padding:26px 20px; }
  .atl-lithium-article .atl-section{ padding:24px 18px 6px; }
  .atl-lithium-article .atl-flow{ flex-direction:column; }
  .atl-lithium-article .atl-flow-arrow{ transform:rotate(90deg); }
  .atl-lithium-article .atl-case{ padding:18px 16px 4px; }
  .atl-lithium-article .atl-cta-final{ padding:22px 18px; }
}/* End custom CSS */