/* Landing bao-tri-website: nền sáng xám-trắng kiểu bảng điều khiển kỹ thuật.
   Xanh lá = đang chạy, cam = nên sửa, đỏ = sập / cần sửa sớm. Chữ IBM Plex Sans, số IBM Plex Mono. */
:root{
  --bg:#eef1f4; --bg2:#e4e8ed; --panel:#fff; --line:#d9dfe6; --line2:#c7cfd9;
  --ink:#0e1726; --txt:#1c2533; --mut:#5a6574;
  --ok:#11a052; --ok-d:#0b7a3e; --ok-soft:#e2f5e9;
  --warn:#e5850b; --warn-soft:#fdf0dc;
  --bad:#e0393e; --bad-soft:#fde7e7;
  --term:#0f1825; --term2:#162232;
  --r:10px; --max:1180px;
  --mono:'IBM Plex Mono',ui-monospace,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:'IBM Plex Sans',system-ui,sans-serif;color:var(--txt);line-height:1.6;overflow-x:hidden;
  background-color:var(--bg);
  background-image:radial-gradient(circle at 1px 1px,rgba(14,23,38,.09) 1px,transparent 0);
  background-size:22px 22px}
a{color:inherit;text-decoration:none}
h1,h2,h3{line-height:1.18;margin:0;color:var(--ink)}
h2{font-size:clamp(25px,3.2vw,38px);font-weight:700;letter-spacing:-.015em}
p{margin:0}
img{max-width:100%}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
.material-symbols-outlined{font-size:21px;vertical-align:middle;line-height:1}
.hl{background:linear-gradient(transparent 62%,rgba(17,160,82,.28) 62%);padding:0 .08em}

/* đèn trạng thái */
.led{display:inline-block;width:9px;height:9px;border-radius:50%;flex:none;background:var(--ok);box-shadow:0 0 0 0 rgba(17,160,82,.55);animation:beat 1.8s infinite}
.led.bad{background:var(--bad);box-shadow:0 0 0 0 rgba(224,57,62,.6);animation:beatR .9s infinite}
.led.warn{background:var(--warn);animation:none}
@keyframes beat{70%{box-shadow:0 0 0 8px rgba(17,160,82,0)}100%{box-shadow:0 0 0 0 rgba(17,160,82,0)}}
@keyframes beatR{70%{box-shadow:0 0 0 9px rgba(224,57,62,0)}100%{box-shadow:0 0 0 0 rgba(224,57,62,0)}}

/* reveal */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
.d1{transition-delay:.1s}.d2{transition-delay:.2s}.d3{transition-delay:.3s}.d4{transition-delay:.4s}

/* thanh trên */
.top{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:20px;padding:10px 24px;background:rgba(255,255,255,.88);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--ink)}
.brand img{border-radius:7px;height:auto}
.topnav{display:flex;gap:20px;margin-left:auto;font-size:14px;color:var(--mut)}
.topnav a:hover{color:var(--ink)}
@media(max-width:860px){.topnav{display:none}.top .btn{margin-left:auto}}

/* nút */
.btn{display:inline-flex;align-items:center;gap:8px;border-radius:8px;font-weight:600;padding:11px 20px;border:1px solid transparent;transition:transform .15s,box-shadow .2s,background .2s,border-color .2s;cursor:pointer;font-family:inherit;font-size:15px;line-height:1.2}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--ink);color:#fff;box-shadow:0 1px 0 rgba(255,255,255,.12) inset,0 8px 20px -10px rgba(14,23,38,.6)}
.btn-primary:hover{background:#1b2a40;box-shadow:0 0 0 3px rgba(17,160,82,.25),0 10px 24px -10px rgba(14,23,38,.6)}
.btn-ghost{background:var(--panel);border-color:var(--line2);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ok);color:var(--ok-d)}
.btn-lg{padding:14px 24px;font-size:16px}
.btn-sm{padding:8px 14px;font-size:13.5px}
.btn.full{width:100%;justify-content:center}
/* vòng sáng bằng box-shadow: không làm rộng vùng cuộn như transform:scale (nút rộng 100% trên mobile) */
.pulse{animation:ring 2.2s ease-out infinite}
@keyframes ring{0%{box-shadow:0 0 0 0 rgba(17,160,82,.55),0 8px 20px -10px rgba(14,23,38,.6)}100%{box-shadow:0 0 0 12px rgba(17,160,82,0),0 8px 20px -10px rgba(14,23,38,.6)}}

/* hero */
.hero{max-width:var(--max);margin:0 auto;padding:60px 24px 44px;display:grid;grid-template-columns:1fr 1.02fr;gap:44px;align-items:center}
.badge{display:inline-flex;align-items:center;gap:9px;font-size:13px;font-weight:600;color:var(--ok-d);background:var(--panel);border:1px solid var(--line);padding:6px 13px;border-radius:999px;margin-bottom:18px}
h1{font-size:clamp(34px,4.6vw,56px);font-weight:700;letter-spacing:-.025em}
.lead{font-size:17.5px;color:var(--mut);max-width:560px;margin:20px 0 26px}
.tw{font-family:var(--mono);font-weight:600;font-size:.94em;color:var(--ink);background:var(--panel);border:1px solid var(--line);border-radius:5px;padding:1px 6px;white-space:nowrap}
.tw::after{content:"";display:inline-block;width:2px;height:1em;margin-left:2px;vertical-align:-.12em;background:var(--ok);animation:caret .9s step-end infinite}
@keyframes caret{50%{opacity:0}}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.facts{list-style:none;margin:26px 0 0;padding:0;display:grid;gap:8px;font-size:14.5px;color:var(--mut)}
.facts li{display:flex;align-items:center;gap:9px}
.facts .material-symbols-outlined{color:var(--ok);font-size:19px}
.facts b{color:var(--ink)}
@media(max-width:940px){.hero{grid-template-columns:1fr;padding-top:36px}}

/* bảng theo dõi (khối động 1) */
.hero-visual{position:relative;min-width:0}
.mon{position:relative;background:var(--panel);border:1px solid var(--line);border-radius:12px;box-shadow:0 30px 60px -34px rgba(14,23,38,.45),0 2px 0 rgba(14,23,38,.03);overflow:hidden}
.mon-bar{display:flex;align-items:center;gap:10px;padding:10px 14px;border-bottom:1px solid var(--line);background:#f7f9fb;font-size:14px}
.mon-dots{display:flex;gap:5px}.mon-dots i{width:10px;height:10px;border-radius:50%;background:var(--line2)}
.mon-tag{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--warn);background:var(--warn-soft);border-radius:4px;padding:1px 7px}
.mon-clock{margin-left:auto;font-size:13px;color:var(--mut)}
.mon-sum{display:grid;grid-template-columns:repeat(3,1fr);border-bottom:1px solid var(--line)}
.mon-sum>div{padding:12px 14px;border-right:1px solid var(--line);min-width:0}
.mon-sum>div:last-child{border-right:0}
.mon-sum span{display:block;font-size:24px;font-weight:600;color:var(--ok-d);line-height:1.1}
.mon-sum .down span{color:var(--mut)}
.mon-sum .down.on span{color:var(--bad)}
.mon-sum small{font-size:12px;color:var(--mut)}
.mon-rows{padding:6px 0}
.mrow{display:grid;grid-template-columns:auto minmax(0,1.1fr) minmax(0,1fr) 58px;align-items:center;gap:12px;padding:9px 14px;transition:background .3s}
.mrow.bad{background:var(--bad-soft)}
.mrow.fixed{background:var(--ok-soft)}
.mname{min-width:0}
.mname b{display:block;font-size:14px;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mname small{display:block;font-size:12px;color:var(--mut);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mbars{display:flex;justify-content:flex-end;gap:2px;height:22px;overflow:hidden;align-items:stretch}
.mbars i{flex:none;width:4px;border-radius:2px;background:var(--ok);opacity:.85;animation:barin .3s ease both}
.mbars i.b{background:var(--bad);opacity:1}
.mbars i.w{background:var(--warn)}
@keyframes barin{from{transform:scaleY(.2)}}
.mms{text-align:right;font-family:var(--mono);font-size:12.5px;color:var(--mut);white-space:nowrap}
.mrow.bad .mms{color:var(--bad);font-weight:600}
.mon-log{background:var(--term);color:#9fb3c8;font-size:12px;line-height:1.75;padding:10px 14px;height:178px;overflow:hidden;display:flex;flex-direction:column;justify-content:flex-end}
.mon-log div{flex:none;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;animation:logIn .25s ease both}
.mon-log .t{color:#5f7690}
.mon-log .ok{color:#4ade80}
.mon-log .bad{color:#ff6b6e;font-weight:600}
.mon-log .fix{color:#fbbf24}
@keyframes logIn{from{opacity:0;transform:translateY(6px)}}
.mon-alert{position:absolute;left:12px;right:12px;bottom:10px;display:flex;gap:10px;align-items:flex-start;padding:11px 13px;border-radius:9px;background:#fff;border:1px solid var(--bad);border-left-width:4px;box-shadow:0 18px 40px -16px rgba(14,23,38,.55);font-size:13.5px;transform:translateY(130%);opacity:0;transition:transform .35s cubic-bezier(.3,1.3,.6,1),opacity .25s}
.mon-alert.on{transform:none;opacity:1}
.mon-alert .material-symbols-outlined{color:var(--bad);font-size:22px}
.mon-alert b{display:block;color:var(--bad)}
.mon-alert span{color:var(--txt)}
.mon-alert.fixed{border-color:var(--ok)}
.mon-alert.fixed .material-symbols-outlined,.mon-alert.fixed b{color:var(--ok-d)}
.mon-alert.work{border-color:var(--warn)}
.mon-alert.work .material-symbols-outlined,.mon-alert.work b{color:#b86605}
.mon-note{margin-top:10px;font-size:12.5px;color:var(--mut);text-align:center}
@media(max-width:520px){.mrow{grid-template-columns:auto minmax(0,1fr) 64px 50px;gap:9px;padding:9px 12px}.mon-sum span{font-size:20px}.mon-sum>div{padding:10px 10px}.mon-sum small{display:block;font-size:11.5px;line-height:1.3;margin-top:3px}.mon-log{font-size:11.5px;padding:10px 12px}}

/* băng việc */
.ticker{overflow:hidden;background:var(--ink);padding:11px 0;margin-top:10px}
.track{display:flex;gap:34px;width:max-content;animation:scroll 40s linear infinite;font-family:var(--mono);font-size:13px;color:#c6d3e1;white-space:nowrap}
.track span::before{content:"\25CF";color:var(--ok);margin-right:10px;font-size:9px;vertical-align:2px}
.track span:nth-child(3n)::before{color:var(--warn)}
@keyframes scroll{to{transform:translateX(-50%)}}

/* section */
.section{max-width:var(--max);margin:0 auto;padding:78px 24px}
.sec-head{max-width:760px;margin:0 0 34px}
.sec-head p{color:var(--mut);margin-top:12px;font-size:16.5px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12.5px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--ok-d);margin-bottom:10px}
.eyebrow i{width:8px;height:8px;border-radius:2px;background:var(--ok)}

/* nỗi đau ↔ cách lo */
.incidents{display:grid;gap:12px}
.inc-row{display:grid;grid-template-columns:1fr auto 1fr;gap:14px;align-items:stretch}
.inc-bad,.inc-good{padding:18px 20px;border-radius:var(--r);background:var(--panel);border:1px solid var(--line)}
.inc-bad{border-left:4px solid var(--bad)}
.inc-row:nth-child(2) .inc-bad,.inc-row:nth-child(4) .inc-bad{border-left-color:var(--warn)}
.inc-good{border-left:4px solid var(--ok);background:linear-gradient(90deg,var(--ok-soft),#fff 70%)}
.inc-bad h3{font-size:17px;margin:6px 0 4px}
.inc-bad p,.inc-good p{color:var(--mut);font-size:14.5px}
.inc-good p{color:var(--txt);margin-top:6px}
.lvl{display:inline-block;font-family:var(--mono);font-size:11px;font-weight:600;letter-spacing:.06em;padding:2px 8px;border-radius:4px}
.lvl.red{color:var(--bad);background:var(--bad-soft)}
.lvl.amber{color:#b86605;background:var(--warn-soft)}
.lvl.green{color:var(--ok-d);background:#fff;border:1px solid #bfe6cd}
.inc-arrow{align-self:center;color:var(--ok);font-size:26px}
@media(max-width:780px){.inc-row{grid-template-columns:1fr;gap:0}.inc-arrow{transform:rotate(90deg);justify-self:center;margin:2px 0}}

/* con số */
.stats{max-width:var(--max);margin:0 auto;padding:0 24px;display:grid;grid-template-columns:repeat(4,1fr);gap:0;}
.stats>div{padding:22px 20px;background:var(--panel);border:1px solid var(--line);margin-left:-1px}
.stats>div:first-child{border-radius:var(--r) 0 0 var(--r);margin-left:0}
.stats>div:last-child{border-radius:0 var(--r) var(--r) 0}
.stats b{display:block;font-size:40px;font-weight:600;color:var(--ink);line-height:1.1}
.stats b small{font-size:16px;color:var(--ok-d);font-weight:500}
.stats>div>span{display:block;margin-top:6px;font-size:13.5px;color:var(--mut)}
@media(max-width:760px){.stats{grid-template-columns:1fr 1fr}.stats>div{margin:0;border-radius:0!important}.stats>div:nth-child(1){border-radius:var(--r) 0 0 0!important}.stats>div:nth-child(2){border-radius:0 var(--r) 0 0!important}.stats>div:nth-child(3){border-radius:0 0 0 var(--r)!important}.stats>div:nth-child(4){border-radius:0 0 var(--r) 0!important}.stats b{font-size:32px}}

/* kiểm tra sức khoẻ (khối động 2) */
.hc{background:var(--panel);border:1px solid var(--line);border-radius:12px;box-shadow:0 30px 60px -40px rgba(14,23,38,.45);overflow:hidden}
.hc-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;border-bottom:1px solid var(--line);background:#f7f9fb}
.hc-url{display:flex;align-items:center;gap:8px;min-width:0;font-size:14px;padding:6px 12px;border:1px solid var(--line);border-radius:6px;background:#fff;flex:1;max-width:420px}
.hc-url .mono{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hc-url .material-symbols-outlined{color:var(--mut);font-size:18px}
.hc-body{display:grid;grid-template-columns:1.45fr 1fr}
.hc-groups{display:grid;grid-template-columns:1fr 1fr;border-right:1px solid var(--line)}
.hg{padding:16px 18px;border-bottom:1px solid var(--line);border-right:1px solid var(--line)}
.hg:nth-child(2n){border-right:0}
.hg:nth-last-child(-n+2){border-bottom:0}
.hg h4{display:flex;align-items:center;gap:8px;margin:0 0 10px;font-size:14.5px;color:var(--ink)}
.hg h4 .material-symbols-outlined{font-size:19px;color:var(--mut)}
.hi{display:grid;grid-template-columns:20px 1fr;gap:8px;align-items:start;padding:6px 0;font-size:13.5px;color:var(--mut);transition:color .3s}
.hi .s{width:18px;height:18px;margin-top:1px;border-radius:50%;border:2px solid var(--line2);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;color:#fff;transition:all .25s}
.hi.run .s{border-color:var(--line2);border-top-color:var(--ink);animation:spin .7s linear infinite}
.hi.pass .s{background:var(--ok);border-color:var(--ok)}
.hi.warn .s{background:var(--warn);border-color:var(--warn)}
.hi.fail .s{background:var(--bad);border-color:var(--bad)}
.hi.pass,.hi.warn,.hi.fail{color:var(--txt)}
.hi em{display:block;font-style:normal;font-family:var(--mono);font-size:11.5px;color:var(--mut);opacity:0;max-height:0;overflow:hidden;transition:opacity .3s,max-height .3s}
.hi.pass em,.hi.warn em,.hi.fail em{opacity:1;max-height:40px}
.hi.warn em{color:#b86605}.hi.fail em{color:var(--bad)}
@keyframes spin{to{transform:rotate(360deg)}}
.hc-side{padding:16px 18px;background:#fafbfc;min-width:0}
.hc-meter{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:16px}
.hc-meter>div{padding:10px;border-radius:8px;background:#fff;border:1px solid var(--line);border-top:3px solid var(--ok)}
.hc-meter .w{border-top-color:var(--warn)}.hc-meter .f{border-top-color:var(--bad)}
.hc-meter b{display:block;font-size:24px;font-weight:600;color:var(--ink);line-height:1.1}
.hc-meter small{font-size:12px;color:var(--mut)}
.hc-side h3{display:flex;align-items:center;gap:7px;font-size:15px;margin-bottom:8px}
.hc-side h3 .material-symbols-outlined{color:var(--ok-d)}
.hc-todo{margin:0;padding-left:20px;display:grid;gap:7px;font-size:14px}
.hc-todo li{animation:logIn .3s ease both}
.hc-todo li.f::marker{color:var(--bad);font-weight:700}
.hc-todo li.w::marker{color:#b86605;font-weight:700}
.hc-todo small{display:block;color:var(--mut);font-size:12.5px}
.hc-empty{font-size:13.5px;color:var(--mut)}
.hc-note{padding:10px 16px;font-size:12.5px;color:var(--mut);border-top:1px solid var(--line);text-align:center}
@media(max-width:900px){.hc-body{grid-template-columns:1fr}.hc-groups{border-right:0;border-bottom:1px solid var(--line)}}
@media(max-width:560px){.hc-groups{grid-template-columns:1fr}.hg{border-right:0!important;border-bottom:1px solid var(--line)!important}.hg:last-child{border-bottom:0!important}.hc-head{padding:10px 12px}}

/* gói */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;align-items:stretch}
@media(max-width:900px){.plans{grid-template-columns:1fr}}
.plan{display:flex;flex-direction:column;padding:24px;border-radius:12px;background:var(--panel);border:1px solid var(--line)}
.plan.main{border:2px solid var(--ink);box-shadow:0 26px 50px -30px rgba(14,23,38,.5)}
.plan-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.plan-ic{font-size:26px;color:var(--ok-d);background:var(--ok-soft);padding:9px;border-radius:9px}
.plan.main .plan-ic{color:#fff;background:var(--ink)}
.plan-kind{font-size:12px;color:var(--mut);border:1px solid var(--line);border-radius:4px;padding:2px 8px}
.plan.main .plan-kind{color:var(--ok-d);border-color:#bfe6cd;background:var(--ok-soft)}
.plan h3{font-size:20px;margin-bottom:6px}
.plan-sub{color:var(--mut);font-size:14.5px;margin-bottom:16px}
.inc{list-style:none;margin:0 0 18px;padding:0;display:grid;gap:9px;font-size:14.5px}
.inc li{display:flex;gap:8px;align-items:flex-start}
.inc .material-symbols-outlined{color:var(--ok);font-size:19px;margin-top:2px}
.plan-foot{font-size:13.5px;color:var(--ok-d);background:var(--ok-soft);padding:10px 12px;border-radius:8px;margin:-4px 0 18px}
.plan .btn{margin-top:auto}
.plans-note{margin-top:18px;font-size:14.5px;color:var(--mut)}

/* phạm vi */
.scope{display:grid;grid-template-columns:1.4fr 1fr;gap:16px}
@media(max-width:820px){.scope{grid-template-columns:1fr}}
.scope-col{padding:24px;border-radius:12px;background:var(--panel);border:1px solid var(--line)}
.scope-col h3{display:flex;align-items:center;gap:8px;font-size:18px;margin-bottom:14px}
.scope-col.yes h3 .material-symbols-outlined{color:var(--ok)}
.scope-col.no{background:#f8f9fb}
.scope-col.no h3 .material-symbols-outlined{color:var(--bad)}
.scope-col ul{margin:0;padding-left:20px;display:grid;gap:7px;font-size:15px}
.scope-col.no ul{color:var(--mut)}
.stack{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.pf{display:inline-flex;align-items:center;gap:7px;font-family:var(--mono);font-size:13px;font-weight:500;padding:5px 11px;border-radius:6px;border:1px solid var(--line);background:#fafbfc}
.pf::before{content:"";width:9px;height:9px;border-radius:2px;background:var(--c,#888)}
.pf.wp{--c:#21759b}.pf.lv{--c:#f05340}.pf.nx{--c:#111}.pf.rc{--c:#3fb6d8}.pf.st{--c:#8a94a3}
.self{display:flex;gap:14px;align-items:center;margin-top:16px;padding:16px 20px;border-radius:12px;background:var(--ink);color:#dfe7f0;font-size:15px}
.self .material-symbols-outlined{color:#4ade80;font-size:28px}

/* 4 bước */
.pipe{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative}
.pipe li{position:relative;padding:22px 20px 22px;background:var(--panel);border:1px solid var(--line);margin-left:-1px}
.pipe li:first-child{border-radius:12px 0 0 12px;margin-left:0}
.pipe li:last-child{border-radius:0 12px 12px 0}
.pipe li::after{content:"";position:absolute;right:-9px;top:30px;width:16px;height:16px;background:var(--panel);border-top:1px solid var(--line);border-right:1px solid var(--line);transform:rotate(45deg);z-index:1}
.pipe li:last-child::after{display:none}
.st-pill{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;padding:3px 9px;border-radius:999px;background:var(--bg2);color:var(--mut);transition:background .4s .3s,color .4s .3s}
.st-pill::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--line2);transition:background .4s .3s}
.pipe li.in .st-pill{background:var(--ok-soft);color:var(--ok-d)}
.pipe li.in .st-pill::before{background:var(--ok)}
.pipe h3{font-size:17px;margin:12px 0 6px}
.pipe p{font-size:14.5px;color:var(--mut)}
@media(max-width:860px){.pipe{grid-template-columns:1fr 1fr}.pipe li{margin:0;border-radius:0!important}.pipe li::after{display:none}.pipe li:nth-child(1){border-radius:12px 0 0 0!important}.pipe li:nth-child(2){border-radius:0 12px 0 0!important}.pipe li:nth-child(3){border-radius:0 0 0 12px!important}.pipe li:nth-child(4){border-radius:0 0 12px 0!important}}
@media(max-width:520px){.pipe{grid-template-columns:1fr}.pipe li:nth-child(n){border-radius:0!important}.pipe li:first-child{border-radius:12px 12px 0 0!important}.pipe li:last-child{border-radius:0 0 12px 12px!important}}

/* faq */
.faq{max-width:860px;display:grid;gap:8px}
details{border-radius:10px;border:1px solid var(--line);background:var(--panel);padding:0 18px;transition:border-color .2s}
details[open]{border-color:var(--ok)}
summary{cursor:pointer;list-style:none;padding:15px 0;font-weight:600;color:var(--ink);display:flex;justify-content:space-between;align-items:center;gap:12px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-family:var(--mono);font-size:20px;color:var(--ok-d);transition:transform .25s;flex:none}
details[open] summary::after{transform:rotate(45deg)}
details p{padding:0 0 16px;color:var(--mut);font-size:15px}

/* form lead */
.contact{padding-top:20px}
.contact-box{display:grid;grid-template-columns:.9fr 1.1fr;gap:36px;padding:36px;border-radius:14px;background:var(--panel);border:1px solid var(--line);box-shadow:0 30px 70px -40px rgba(14,23,38,.5);border-top:4px solid var(--ok)}
@media(max-width:880px){.contact-box{grid-template-columns:1fr;padding:24px;gap:24px}}
.contact-box h2{font-size:clamp(23px,2.6vw,30px);margin:2px 0 12px}
.contact-text p{color:var(--mut)}
.contact-list{list-style:none;margin:16px 0;padding:0;display:grid;gap:8px;font-size:14.5px;color:var(--txt)}
.contact-list li{display:flex;gap:8px;align-items:center}
.contact-list .material-symbols-outlined{color:var(--ok-d);font-size:19px}
.contact-alt{font-weight:600;color:var(--ink)!important}
.contact-alt a{color:var(--ok-d);text-decoration:underline;text-underline-offset:3px}
form{display:grid;gap:12px;min-width:0}
.two{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:520px){.two{grid-template-columns:1fr}}
.fl{display:grid;gap:5px;min-width:0}
.fl>span{font-size:13px;font-weight:600;color:var(--ink)}
input,select,textarea{width:100%;font:inherit;font-size:15px;color:var(--ink);background:#fbfcfd;border:1px solid var(--line2);border-radius:8px;padding:11px 12px;outline:none;transition:border-color .2s,box-shadow .2s}
input::placeholder,textarea::placeholder{color:#97a1ae}
input:focus,select:focus,textarea:focus{border-color:var(--ok);box-shadow:0 0 0 3px rgba(17,160,82,.18);background:#fff}
textarea{resize:vertical}
.form-hint{font-size:12.5px;color:var(--mut)}
.sis-lead-error{color:var(--bad);font-size:14px}
.sis-lead-thanks{padding:22px;border-radius:10px;background:var(--ok-soft);color:var(--ok-d);font-weight:600}

/* footer + sticky */
.foot{max-width:var(--max);margin:0 auto;padding:28px 24px 110px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:14px;color:var(--mut);border-top:1px solid var(--line)}
.foot b{color:var(--ink)}
.foot a{color:var(--ok-d)}
.foot a:hover{text-decoration:underline}
.foot-row{display:flex;gap:16px;flex-wrap:wrap;margin-top:6px}
.foot-a{max-width:640px}
.foot-links{display:flex;gap:16px;flex-wrap:wrap}
.sticky-cta{position:fixed;left:0;right:0;bottom:0;z-index:60;display:none;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px;padding-bottom:calc(10px + env(safe-area-inset-bottom));background:rgba(255,255,255,.95);backdrop-filter:blur(10px);border-top:1px solid var(--line);font-size:14px;box-shadow:0 -10px 30px -20px rgba(14,23,38,.5)}
.sticky-cta b{color:var(--ink);font-size:15px}
.sticky-cta>span{display:flex;align-items:center;gap:8px}
@media(max-width:860px){.sticky-cta{display:flex}}
@media(min-width:861px){.foot{padding-bottom:40px}}

@media(max-width:520px){
  .section{padding:60px 18px}
  .hero{padding:30px 18px 36px;gap:30px}
  .stats{padding:0 18px}
  h1{font-size:34px}
  .lead{font-size:16.5px}
  .cta .btn{width:100%;justify-content:center}
  .top{padding:9px 14px;gap:10px}
  .brand span{font-size:15px}
  .contact-box{padding:20px}
}

/* tắt hiệu ứng khi người dùng chọn giảm chuyển động */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
  .track{transform:none}
}