@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@400;500;600;700;800&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--black:#171715;--black-soft:#22221f;--paper:#faf9f6;--white:#fff;--ink:#24231f;--muted:#75746d;--line:#dedbd4;--orange:#ee9138;--orange-dark:#ca6c22;--wood:#b49a76;--sans:'Be Vietnam Pro',Arial,sans-serif;--display:'Manrope','Be Vietnam Pro',Arial,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:82px}body{margin:0;background:var(--paper);color:var(--ink);font:14px/1.65 var(--sans);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}img{max-width:100%}button{font:inherit}.site-header{height:80px;padding:0 6.2%;display:flex;align-items:center;justify-content:space-between;background:var(--paper);position:sticky;top:0;z-index:30;border-bottom:1px solid #e8e5de}.brand{display:flex;align-items:center;gap:10px}.brand img{width:51px;height:51px;object-fit:contain}.brand span{display:flex;flex-direction:column;line-height:1.23}.brand b{font:700 9px var(--display);letter-spacing:.19em;color:#5d554b}.brand strong{font:800 14px var(--display);letter-spacing:.09em;color:#201e19}.main-nav{display:flex;align-items:center;gap:30px}.main-nav>a{font-size:12px;color:#5a5952;transition:color .2s}.main-nav>a:hover{color:var(--orange-dark)}.main-nav .nav-call{padding:10px 14px;border:1px solid #c9c5bb;color:#292722;font-weight:600}.nav-call b{color:var(--orange-dark);padding-left:14px}.menu-toggle{display:none}.hero{height:min(740px,calc(100svh - 80px));min-height:590px;position:relative;overflow:hidden;background:var(--black)}.hero-photo,.hero-shade{position:absolute;inset:0;width:100%;height:100%}.hero-photo{object-fit:cover;object-position:center 54%;animation:hero-settle 1.2s ease-out both}.hero-shade{background:linear-gradient(90deg,rgba(17,17,15,.86) 0%,rgba(17,17,15,.66) 36%,rgba(17,17,15,.1) 74%),linear-gradient(0deg,rgba(17,17,15,.56),transparent 29%)}@keyframes hero-settle{from{transform:scale(1.035);opacity:.65}to{transform:scale(1);opacity:1}}.hero-copy{position:absolute;left:10%;top:50%;transform:translateY(-50%);width:min(630px,64%);color:#fbf9f3}.hero-kicker{display:flex;align-items:center;gap:10px;font-size:11px;letter-spacing:.06em;color:#e8e3d9}.hero-kicker span{width:28px;height:2px;background:var(--orange)}.hero h1{font:700 clamp(47px,6.4vw,86px)/1.04 var(--display);letter-spacing:-.065em;margin:27px 0 21px}.hero h1 em{font-style:normal;color:#f0a250}.hero-copy>p{max-width:430px;color:#dfded7;font-size:15px;line-height:1.8}.hero-actions{display:flex;align-items:center;gap:24px;margin-top:30px}.button{display:inline-flex;align-items:center;gap:25px;justify-content:space-between;padding:14px 17px;font-size:12px;font-weight:700;transition:background .2s,color .2s,transform .2s}.button:hover{transform:translateY(-2px)}.button-orange{background:var(--orange);color:#1a1916}.button-orange:hover{background:#f6aa57}.button span{font-size:15px}.hero-link{font-size:12px;color:#f0eee8}.hero-link span{color:var(--orange);padding-left:10px}.hero-bottom{position:absolute;bottom:0;left:0;right:0;min-height:51px;padding:0 6.2%;border-top:1px solid #ffffff38;display:flex;align-items:center;justify-content:space-between;gap:12px;color:#e5e2da;font-size:10px;letter-spacing:.08em}.hero-bottom span:nth-child(2){color:#e7a054}.hero-scroll{position:absolute;right:6.2%;bottom:80px;width:39px;height:39px;border:1px solid #ffffff73;border-radius:50%;display:grid;place-items:center;color:#fff;font-size:16px}.service-ribbon{height:60px;background:var(--orange);display:flex;justify-content:center;align-items:center;gap:clamp(14px,3.6vw,52px);padding:0 20px;overflow:hidden;white-space:nowrap;color:#27231d;font:700 9px var(--display);letter-spacing:.12em}.service-ribbon i{font-style:normal;font-size:13px}.section{padding-left:10%;padding-right:10%}.story{padding-top:105px;padding-bottom:100px;background:var(--paper)}.story-label,.section-label{font:700 9px var(--display);letter-spacing:.14em;color:#7b776f}.story-label span{color:var(--orange-dark);padding:0 6px}.story-layout{display:grid;grid-template-columns:1.05fr .8fr;gap:13%;padding:37px 0 56px}.story-heading h2,.services h2,.portfolio h2,.process h2{font:700 clamp(37px,4.5vw,59px)/1.1 var(--display);letter-spacing:-.06em;margin:0}.story-heading h2 em,.services h2 em,.portfolio h2 em,.process h2 em{font-style:normal;color:#b96c30}.story-mark{display:flex;align-items:center;gap:7px;margin-top:28px}.story-mark img{width:48px;height:48px;object-fit:contain}.story-mark span{font-size:7px;line-height:1.7;letter-spacing:.13em;color:#89857d}.story-copy{padding-top:5px;max-width:480px}.story-copy p{font-size:13px;color:#737168;line-height:1.9;margin:0 0 15px}.story-copy .story-lead{font-size:16px;line-height:1.6;color:#282722;font-weight:600;margin-bottom:17px}.story-copy p b{color:#ae6029}.text-link{display:inline-flex;gap:20px;align-items:center;border-bottom:1px solid #aaa49a;padding:10px 0 7px;margin-top:5px;font-size:9px;font-weight:700}.text-link span{color:var(--orange-dark);font-size:14px}.story-photo-row{display:grid;grid-template-columns:1.12fr .8fr 1fr;gap:12px;align-items:start}.story-photo-row figure{margin:0}.story-photo-row figure:nth-child(2){margin-top:40px}.story-photo-row figure:nth-child(3){margin-top:84px}.story-photo-row img{width:100%;height:clamp(210px,26vw,355px);display:block;object-fit:cover}.story-photo-row figure:nth-child(2) img{height:clamp(190px,23vw,310px)}.story-photo-row figcaption{padding-top:8px;font-size:8px;color:#88847c}.services{padding-top:91px;padding-bottom:78px;background:var(--black);color:#f7f5ef}.services-top{display:flex;align-items:end;justify-content:space-between;gap:30px;padding-bottom:39px}.services .section-label,.process .section-label{color:#aaa69b;margin-bottom:18px}.services h2{font-size:clamp(37px,4vw,54px)}.services h2 em{color:var(--orange)}.services-top>p{max-width:300px;margin:0 2% 4px 0;color:#b7b4aa;font-size:10px;line-height:1.9}.service-list{border-top:1px solid #ffffff38}.service-list a{min-height:73px;display:grid;grid-template-columns:1fr minmax(200px,.65fr) 34px;align-items:center;gap:16px;border-bottom:1px solid #ffffff38;transition:padding .2s,background .2s}.service-list a:hover{padding:0 12px;background:#ffffff08}.service-list b{font:600 19px var(--display);letter-spacing:-.03em}.service-list small{font-size:12px;color:#aaa69c}.service-list i{font-style:normal;color:var(--orange);font-size:18px;text-align:right}.services-caption{display:flex;justify-content:space-between;margin-top:18px;color:#858178;font-size:7px;letter-spacing:.13em}.portfolio{padding-top:104px;padding-bottom:95px;background:#f4f2ed}.portfolio-head{display:grid;grid-template-columns:1fr .7fr auto;gap:50px;align-items:end;margin-bottom:39px}.portfolio .section-label{margin-bottom:17px}.portfolio h2{font-size:clamp(37px,4vw,53px)}.portfolio-head>p{max-width:275px;margin:0 0 6px;font-size:12px;line-height:1.85;color:#77746d}.photo-count{display:flex;align-items:center;gap:10px;border-left:1px solid #cfcbc2;padding-left:17px;margin-bottom:4px}.photo-count strong{font:700 38px/.95 var(--display);letter-spacing:-.07em;color:#ba6b31}.photo-count span{font-size:7px;line-height:1.6;letter-spacing:.12em;color:#79766e}.photo-grid{display:grid;grid-template-columns:repeat(12,1fr);grid-auto-rows:24px;grid-auto-flow:dense;gap:12px}.photo-card{grid-column:span 3;grid-row:span 13;margin:0;position:relative;overflow:hidden;background:#ddd8cf}.photo-card:nth-child(7n+1){grid-column:span 6;grid-row:span 19}.photo-card:nth-child(7n+3),.photo-card:nth-child(7n+5){grid-row:span 16}.photo-card:nth-child(7n+4){grid-column:span 3;grid-row:span 12}.photo-card button{position:absolute;inset:0;padding:0;border:0;background:none;width:100%;height:100%;cursor:zoom-in;overflow:hidden}.photo-card img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .55s,filter .4s}.photo-card button:hover img{transform:scale(1.04);filter:brightness(.86)}.photo-card figcaption{position:absolute;left:0;right:0;bottom:0;padding:24px 12px 10px;background:linear-gradient(transparent,#141412a8);color:#f7f5ef;display:flex;justify-content:space-between;font-size:7px;letter-spacing:.1em;pointer-events:none}.photo-card figcaption span:first-child{color:#f5ad64}.portfolio-foot{display:flex;align-items:center;justify-content:space-between;border-top:1px solid #d5d1c7;margin-top:27px;padding-top:15px}.portfolio-foot>span{font-size:7px;letter-spacing:.13em;color:#87837b}.portfolio-foot>a{font-size:9px;font-weight:600}.portfolio-foot b{color:#c97530;padding-left:12px}.process{background:#d46f2c;color:#211b15;display:grid;grid-template-columns:.8fr 1fr;gap:12%;padding-top:96px;padding-bottom:100px}.process .section-label{color:#55351d}.process h2{font-size:clamp(38px,4.2vw,56px)}.process h2 em{color:#f9e9d4}.process-intro>p{max-width:315px;margin-top:24px;font-size:10px;line-height:1.85;color:#4d3827}.process-steps article{display:grid;grid-template-columns:42px 1fr;gap:16px;padding:12px 0;border-bottom:1px solid #5a402c61}.process-steps article:first-child{padding-top:0}.process-steps article>span{font:600 10px var(--display);color:#f2d7b9;padding-top:4px}.process-steps h3{font:700 14px var(--display);margin:0 0 4px}.process-steps 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strong{color:#f4f0e8}.footer>span,.footer>a:last-child{font-size:8px;letter-spacing:.05em}.footer>a:last-child{color:#e99a49}.lightbox{padding:0;border:0;background:#111;max-width:92vw;max-height:92vh;width:max-content;overflow:visible}.lightbox::backdrop{background:#0f0f0eed;backdrop-filter:blur(5px)}.lightbox>img{display:block;max-width:88vw;max-height:88vh;object-fit:contain}.lightbox-close{position:absolute;right:0;top:-38px;width:30px;height:30px;border:1px solid #ffffff70;border-radius:50%;background:transparent;color:white;font-size:20px;line-height:1;cursor:pointer}:focus-visible{outline:3px solid #f09b4b;outline-offset:3px}::selection{background:#f3a455;color:#171715}
@media(max-width:980px){.main-nav{gap:18px}.section{padding-left:7%;padding-right:7%}.hero-copy{left:8%}.hero-bottom{padding:0 4%}.photo-grid{grid-auto-rows:20px}.portfolio-head{gap:26px}.contact{padding-left:7%;padding-right:7%}}
@media(max-width:680px){html{scroll-padding-top:65px}.site-header{height:65px;padding:0 18px}.brand img{width:43px;height:43px}.brand strong{font-size:12px}.menu-toggle{display:flex;flex-direction:column;gap:5px;border:0;background:none;padding:9px}.menu-toggle span{width:21px;height:2px;background:#292722}.main-nav{display:none;position:absolute;top:64px;left:0;right:0;padding:11px 19px 20px;background:var(--paper);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:0}.main-nav.open{display:flex}.main-nav>a{padding:11px 0;border-bottom:1px solid var(--line)}.main-nav .nav-call{margin-top:10px;padding:12px}.hero{height:calc(90svh - 65px);min-height:570px;max-height:760px}.hero-photo{object-position:59% center}.hero-shade{background:linear-gradient(90deg,rgba(17,17,15,.84),rgba(17,17,15,.4) 70%),linear-gradient(0deg,rgba(17,17,15,.6),transparent 38%)}.hero-copy{left:22px;top:45%;transform:translateY(-40%);width:calc(100% - 44px)}.hero h1{font-size:clamp(47px,12vw,66px);margin:22px 0 15px}.hero-copy>p{font-size:11px;max-width:340px}.hero-actions{align-items:flex-start;flex-direction:column;gap:17px;margin-top:21px}.hero-bottom{padding:0 18px;min-height:48px;justify-content:flex-start;overflow:hidden}.hero-bottom span{font-size:7px;white-space:nowrap}.hero-bottom span:nth-child(2){display:none}.hero-scroll{right:19px;bottom:68px;width:34px;height:34px}.service-ribbon{height:48px;justify-content:flex-start;gap:17px;font-size:8px}.section{padding-left:21px;padding-right:21px}.story{padding-top:69px;padding-bottom:65px}.story-layout{display:block;padding:25px 0 30px}.story-heading h2{font-size:43px}.story-mark{margin-top:18px}.story-copy{margin-top:23px}.story-copy .story-lead{font-size:14px}.story-photo-row{grid-template-columns:1fr 1fr;gap:10px}.story-photo-row figure:first-child{grid-column:1/3}.story-photo-row figure:first-child img{height:300px}.story-photo-row figure:nth-child(2),.story-photo-row figure:nth-child(3){margin-top:0}.story-photo-row figure:nth-child(2) img,.story-photo-row figure:nth-child(3) img{height:190px}.story-photo-row figcaption{font-size:7px}.services{padding-top:67px;padding-bottom:56px}.services-top{display:block;padding-bottom:23px}.services h2,.portfolio h2{font-size:40px}.services-top>p{margin-top:19px;font-size:9px}.service-list a{min-height:66px;grid-template-columns:1fr 22px;gap:10px}.service-list b{font-size:13px}.service-list small{grid-column:1;grid-row:2;margin-top:-17px;font-size:8px}.service-list i{grid-column:2;grid-row:1/3}.services-caption{font-size:6px;gap:9px}.portfolio{padding-top:68px;padding-bottom:65px}.portfolio-head{grid-template-columns:1fr auto;gap:13px;margin-bottom:24px}.portfolio-head>p{grid-column:1/3;grid-row:2;max-width:310px;font-size:9px}.photo-count{grid-column:2;grid-row:1;padding-left:10px;gap:6px}.photo-count strong{font-size:31px}.photo-count span{font-size:6px}.photo-grid{grid-template-columns:repeat(6,1fr);grid-auto-rows:17px;gap:7px}.photo-card{grid-column:span 3;grid-row:span 12}.photo-card:nth-child(7n+1){grid-column:span 6;grid-row:span 17}.photo-card:nth-child(7n+3),.photo-card:nth-child(7n+5){grid-row:span 14}.photo-card figcaption{padding:20px 7px 7px;font-size:6px}.portfolio-foot{align-items:flex-start;gap:15px}.portfolio-foot>span{font-size:6px;line-height:1.5}.portfolio-foot>a{font-size:8px;text-align:right}.process{display:block;padding-top:67px;padding-bottom:68px}.process-intro>p{margin:14px 0 28px;font-size:9px}.process h2{font-size:42px}.process-steps article{grid-template-columns:32px 1fr;gap:12px;padding:11px 0}.process-steps h3{font-size:12px}.process-steps p{font-size:8px}.closing{padding-top:65px;padding-bottom:63px}.closing-quote{font-size:23px}.contact{min-height:540px;padding:65px 22px 52px;align-items:flex-start}.contact-photo{left:24%;top:42%;opacity:.7}.contact-overlay{background:linear-gradient(180deg,#171715 0%,#171715f0 46%,#17171588 100%)}.contact-content{margin-top:0}.contact h2{font-size:43px}.contact-more{font-size:8px}.footer{padding:12px 18px;flex-wrap:wrap}.footer>span{order:3;width:100%;font-size:7px}.footer>a:last-child{font-size:7px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}

/* ---- NTTN 2026: nội dung mới (bài toán, cách tư vấn, quy trình, thư viện) ---- */
:root{--ink:#171715;--paper:#f4f2ee;--warm:#D35400;--line:rgba(23,23,21,.14)}
.section{padding:96px 6vw;background:var(--paper);color:var(--ink)}
.section:nth-of-type(even){background:#fff}
.section-label{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--warm);font-weight:700;margin-bottom:22px}
.section h2{font-size:clamp(28px,3.6vw,46px);line-height:1.18;font-weight:800;letter-spacing:-.02em;margin:0 0 28px}
.split{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:start}
.prose p{font-size:16px;line-height:1.72;color:#3a3a36;margin:0 0 16px}
.prose b{color:var(--ink)}
.three-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:56px}
.three-cards article{border:1px solid var(--line);border-radius:18px;padding:28px 26px;background:#fff}
.three-cards h3{font-size:19px;margin:0 0 10px;font-weight:800}
.three-cards p{margin:0;font-size:15px;line-height:1.65;color:#4a4a45}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:28px}
.card-soft{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px 26px}
.card-soft h3{font-size:18px;margin:0 0 10px;font-weight:800}
.card-soft p{margin:0;font-size:15px;line-height:1.68;color:#4a4a45}
.note{border-left:3px solid var(--warm);background:#fdf6f0;padding:18px 22px;border-radius:0 12px 12px 0;font-size:15px;line-height:1.65;color:#4a3b32}
.note b{display:block;margin-bottom:4px;color:var(--ink)}
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:20px;margin-top:36px}
.steps article{border-top:2px solid var(--line);padding-top:18px}
.steps span{font-size:13px;font-weight:800;color:var(--warm)}
.steps h3{font-size:16px;margin:8px 0 8px;font-weight:800}
.steps p{margin:0;font-size:14px;line-height:1.62;color:#4a4a45}
.muted{color:#5a5a55;font-size:15px}
.photo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px;margin-top:28px}
.photo-card{margin:0;border-radius:14px;overflow:hidden;background:#111;aspect-ratio:4/3}
.photo-card img{width:100%;height:100%;object-fit:cover;display:block}
.photo-card button{display:block;width:100%;height:100%;padding:0;border:0;cursor:zoom-in;background:none}
.contact{background:var(--ink);color:#f4f2ee}
.contact .section-label{color:#E9A06A}
.contact .prose p{color:#d7d5cf}
.contact-more{display:flex;flex-wrap:wrap;gap:14px 26px;margin-top:26px;font-size:14px;color:#c9c7c1}
.contact-more a{color:#f4f2ee}
.section .button-orange{background:var(--warm);color:#fff;padding:14px 24px;border-radius:999px;text-decoration:none;display:inline-block;font-weight:700;font-size:15px}
@media(max-width:900px){.split,.grid-2,.three-cards{grid-template-columns:1fr}.steps{grid-template-columns:1fr 1fr}.photo-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}.section{padding:64px 20px}}
@media(max-width:560px){.steps{grid-template-columns:1fr}}