:root{--ink:#173f49;--ink-dark:#123039;--text:#162e38;--muted:#61747b;--line:#dfebe9;--paper:#fff;--bg:#f5f8f6;--lime:#d0f673;--cyan:#85e4d7;--orange:#ff9f80}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:'Be Vietnam Pro','Segoe UI',sans-serif;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #84c3f0;outline-offset:3px}.shell{width:min(1200px,calc(100% - 64px));margin:auto}.site-header{height:88px;background:#fff;border-bottom:1px solid #e8efec;position:relative;z-index:2}.nav{height:100%;display:flex;justify-content:space-between;align-items:center}.brand{display:flex;align-items:center;gap:11px}.brand-symbol{width:42px;height:42px;background:var(--ink);border-radius:13px;color:white;display:grid;place-items:center;font-family:'DM Sans',sans-serif;font-weight:800;font-size:26px;letter-spacing:-5px;padding-right:5px}.brand-symbol span{color:var(--lime);font-size:14px;letter-spacing:0}.brand-type{font-family:'DM Sans',sans-serif;font-weight:800;font-size:24px;color:#173f49;letter-spacing:-1px;line-height:1}.brand-type>span{color:#51a69a}.brand-type small{display:block;font:700 9px 'Be Vietnam Pro',sans-serif;letter-spacing:2.8px;color:#78939b;margin-top:6px}.nav nav{display:flex;gap:38px;align-items:center;font-size:13px;font-weight:700}.nav nav a:not(.nav-practice):hover{color:#439e90}.nav-practice{background:#eaf5ef;border:1px solid #d2e9e1;padding:12px 17px;border-radius:999px;color:#1a6657}.nav-practice:hover{background:#dcf3e9}.hero{background:radial-gradient(ellipse at 64% 105%,#326875,transparent 43%),linear-gradient(120deg,#0f3440,#1c4b54);overflow:hidden;color:white}.hero-grid{min-height:570px;display:grid;grid-template-columns:1.06fr .94fr;align-items:center;gap:30px}.hero-copy{padding:68px 0 70px;position:relative;z-index:1}.eyebrow,.section-kicker{font-size:11px;font-weight:800;letter-spacing:2.2px;color:#c9ef8b;text-transform:uppercase}.eyebrow i,.live-pill span{display:inline-block;background:var(--lime);width:7px;height:7px;border-radius:50%;margin-right:8px;box-shadow:0 0 0 4px #d0f67324}.hero h1{font-size:clamp(39px,4.15vw,60px);letter-spacing:-2.8px;line-height:1.23;margin:22px 0 24px;font-weight:800}.hero h1 em,.wide-banner h2 em{color:var(--lime);font-style:normal}.hero-copy>p{color:#c5d9d8;font-size:14px;line-height:2;max-width:560px}.hero-actions,.download-actions{display:flex;align-items:center;gap:13px;flex-wrap:wrap;margin-top:31px}.btn{border:0;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;gap:20px;font-size:13px;font-weight:800;padding:16px 22px;min-height:50px;transition:transform .18s,background .18s;white-space:nowrap}.btn:hover{transform:translateY(-2px)}.btn-lime{background:var(--lime);color:#173f49}.btn-lime:hover{background:#e3ffae}.btn-ghost{border:1px solid #69838a;color:#fff;background:#ffffff09}.btn-dark{background:var(--ink);color:#fff}.btn-white{color:var(--ink);background:#fff;border:1px solid #ccdeda}.btn-outline{border:1px solid #c9dad4;background:#fff;color:var(--ink)}.hero-proof{margin-top:38px;display:flex;align-items:center;gap:16px;color:#b9d2cf;font-size:10px;flex-wrap:wrap}.hero-proof b{color:#fff}.hero-divider{width:1px;height:21px;background:#6c888f}.hero-art{height:500px;position:relative;display:flex;align-items:center;justify-content:center;transform:rotate(-4deg)}.art-ring{position:absolute;border:1px solid #6e9da448;border-radius:50%;width:460px;height:460px}.art-ring.a2{width:600px;height:600px}.paper-illustration{position:relative;z-index:1;width:320px;height:418px;border-radius:15px;background:#fff;color:#214351;padding:30px 28px;box-shadow:25px 35px 0 #80c3aa22,0 40px 90px #091d224d;transform:rotate(8deg)}.paper-bar{display:flex;justify-content:space-between;font:800 12px 'DM Sans';color:#30665b;margin-bottom:70px}.paper-bar span:last-child{background:#e5f8ce;padding:5px 8px;border-radius:5px}.paper-illustration>b{font-size:23px;line-height:1.45;display:block;letter-spacing:-1px}.paper-lines{margin-top:24px;display:grid;gap:8px}.paper-lines i{height:5px;border-radius:50px;background:#dceae8;width:90%}.paper-lines i:nth-child(2){width:68%}.paper-lines i:nth-child(3){width:84%}.paper-lines i:nth-child(4){width:58%}.answer-grid{display:flex;gap:12px;margin-top:24px}.answer-grid span{width:30px;height:30px;border-radius:50%;border:1px solid #d5e5e2;display:grid;place-items:center;font-weight:800;font-size:10px}.answer-grid span:nth-child(3){background:var(--lime);border-color:var(--lime)}.paper-illustration-foot{border-top:1px solid #e0eae8;position:absolute;bottom:22px;left:28px;right:28px;padding-top:10px;letter-spacing:1px;font-weight:800;font-size:7px;color:#6c9692}.pdf-float{position:absolute;z-index:2;background:var(--orange);color:#562a1d;font-weight:800;font-size:13px;padding:16px 20px;border-radius:12px;box-shadow:0 17px 34px #081b2233}.pdf-float.one{left:0;bottom:85px;transform:rotate(-6deg)}.pdf-float.two{right:-15px;top:94px;background:var(--lime);transform:rotate(5deg)}.benefits{display:grid;grid-template-columns:repeat(3,1fr);background:#fff;margin-top:-1px;min-height:157px;align-items:center;gap:32px;padding-top:30px;padding-bottom:30px}.benefits>div{display:grid;grid-template-columns:44px 1fr;column-gap:15px;row-gap:5px}.benefit-icon{grid-row:1/span 2;width:44px;height:44px;border-radius:12px;background:#edf8e1;color:#377a60;display:grid;place-items:center;font:800 13px 'DM Sans'}.benefits strong{font-size:13px}.benefits p{margin:0;font-size:11px;line-height:1.8;color:var(--muted)}.catalog-section{padding:77px 0 87px;background:linear-gradient(#f5f8f6,#f8faf9)}.section-head{display:flex;justify-content:space-between;align-items:center;gap:25px}.section-head .section-kicker,.detail-panel .section-kicker,.seo-content .section-kicker,.guide .section-kicker{color:#298a7b}.section-head h2,.detail-panel h2{font-size:clamp(27px,3vw,38px);letter-spacing:-1.5px;margin:13px 0 10px}.section-head p{font-size:12px;color:var(--muted);line-height:1.7}.live-pill{border:1px solid #d7e9df;background:#eaf8ef;border-radius:100px;padding:12px 16px;color:#2a7853;font-size:11px;font-weight:800;white-space:nowrap}.live-pill span{background:#4bad7e;box-shadow:0 0 0 4px #4bad7e21}.search-box{margin-top:31px;background:#fff;border:1px solid #dce8e4;border-radius:17px;padding:9px;display:flex;box-shadow:0 12px 29px #143e3d08}.search-field{flex:1;display:flex;align-items:center;gap:16px;padding:0 16px}.search-field span{font-size:25px;color:#6e8e89}.search-field input{width:100%;border:0;outline:0;font-size:13px;color:#173f49}.search-field input::placeholder{color:#91a6a2}.filter-line{display:flex;gap:9px;flex-wrap:wrap;margin:23px 0}.filter-chip{padding:10px 15px;border:1px solid #dce9e4;border-radius:60px;color:#607975;background:#fff;font-size:11px;font-weight:700}.filter-chip.active{background:#204853;color:white;border-color:#204853}.filter-chip small{margin-left:7px;font-size:9px;opacity:.7}.results-status{font-size:11px;font-weight:800;color:#6c827f;margin:28px 0 18px}.paper-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:19px}.paper-card{display:flex;flex-direction:column;min-height:228px;padding:25px 23px 21px;border:1px solid #e1ebe8;border-radius:16px;background:#fff;box-shadow:0 8px 28px #193d3d07;transition:transform .17s,border .17s,box-shadow .17s}.paper-card:hover{transform:translateY(-5px);border-color:#aed9c8;box-shadow:0 22px 35px #193d3d16}.card-top{display:flex;align-items:center;justify-content:space-between;gap:8px}.pill{background:#e3f7d1;color:#407857;font-size:10px;font-weight:800;padding:8px 10px;border-radius:8px}.card-type{color:#90a5a0;font-size:10px}.paper-card h3{font-size:15px;line-height:1.65;letter-spacing:-.3px;margin:22px 0 7px}.paper-card p{margin:0;font-size:10px;color:#8a9f9c;line-height:1.7}.card-bottom{border-top:1px solid #eef2f0;margin-top:auto;padding-top:18px;display:flex;justify-content:space-between;gap:10px;color:#728783;font-size:10px}.card-cta{font-weight:800;color:#287f66}.load-more-wrap{text-align:center;margin-top:35px}.load-more-wrap[hidden],.paper-grid[hidden]{display:none}.results-status.error{color:#b94e42}.wide-banner{background:#193e48;color:white;padding:60px 0}.wide-banner-in{display:flex;align-items:center;justify-content:space-between;gap:30px}.wide-banner h2{font-size:36px;letter-spacing:-1.2px;line-height:1.45}.wide-banner p{color:#b7d2d1;line-height:1.9;font-size:12px;max-width:610px}.footer{padding:59px 0 42px;background:#0f2d36;color:#fff}.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1.2fr;gap:45px}.foot-grid>div{display:flex;flex-direction:column;align-items:flex-start;gap:12px}.footer strong{font-size:17px}.footer b{font-size:12px;color:#c9f181}.footer p,.footer a,.footer span{font-size:11px;line-height:1.9;color:#acc7c8;margin:0}.footer a:hover{color:#fff}.footer span strong{font-size:11px;color:#edf1e7}.detail-hero{background:radial-gradient(ellipse at right,#366a6d 0,transparent 45%),linear-gradient(130deg,#11353f,#224e57);color:#fff;padding:35px 0 77px;overflow:hidden}.breadcrumbs{font-size:10px;color:#afcdcc;display:flex;align-items:center;gap:12px;line-height:1.7;flex-wrap:wrap}.breadcrumbs a:hover{color:white}.detail-grid{display:grid;grid-template-columns:1fr 340px;gap:70px;align-items:center;padding-top:55px}.paper-kind{display:flex;gap:7px}.badge-light{background:var(--lime);color:#163d38;padding:8px 11px;border-radius:6px;font-size:10px;font-weight:800}.badge-dark{background:#ffffff22;color:#d3e9e4;padding:8px 11px;border-radius:6px;font-size:10px;font-weight:800}.detail-copy h1{font-size:clamp(29px,3.6vw,47px);line-height:1.44;letter-spacing:-1.6px;max-width:790px;margin:24px 0 18px}.detail-copy>p{font-size:13px;line-height:2;color:#bed7d6;max-width:660px}.detail-meta{display:flex;gap:18px;flex-wrap:wrap;margin-top:23px;color:#dae6df;font-size:11px}.download-note{font-size:10px;line-height:1.8;color:#c4dbd6;margin-top:15px}.download-note.error{color:#ffbca3}.download-note.success{color:#defbb9}.detail-aside{width:315px;min-height:392px;max-width:100%;background:#fff;color:#20454c;border-radius:11px;padding:25px;box-shadow:16px 20px 0 #ffffff16;transform:rotate(4deg);position:relative;overflow:hidden}.detail-aside:before{position:absolute;content:'';width:170px;height:170px;border-radius:50%;background:#e8f5e7;right:-60px;top:55px}.aside-title{font:800 12px 'DM Sans';display:flex;justify-content:space-between;position:relative;z-index:1}.aside-title span:last-child{background:#e2f4d8;color:#317e60;font-size:10px;padding:7px}.aside-category{display:block;font-size:9px;color:#6b9b8a;letter-spacing:2px;font-weight:800;margin-top:60px}.detail-aside strong{font-size:21px;letter-spacing:-.6px;line-height:1.5;display:block;margin-top:12px;position:relative;z-index:1}.aside-lines{display:grid;gap:11px;margin-top:30px}.aside-lines i{height:5px;border-radius:9px;background:#e6eeeb}.aside-lines i:nth-child(1){width:90%}.aside-lines i:nth-child(2){width:78%}.aside-lines i:nth-child(3){width:86%}.aside-lines i:nth-child(4){width:61%}.aside-stamp{position:absolute;bottom:23px;left:25px;right:25px;border-top:1px solid #dce9e5;padding-top:16px;font-size:10px;color:#6c9085}.aside-stamp b{color:#1a7362}.detail-bottom{display:grid;grid-template-columns:1fr 310px;gap:30px;padding-top:56px;padding-bottom:95px}.detail-panel,.practice-card,.side-notes{border-radius:19px;background:#fff;border:1px solid #e1ebe7;padding:34px}.detail-panel p,.seo-content p,.practice-card p{font-size:12px;line-height:2.05;color:#657a79}.feature-rows{margin-top:27px;display:grid;gap:18px}.feature-rows>div{display:flex;align-items:flex-start;gap:15px;border-top:1px solid #ebf0ef;padding-top:18px}.feature-rows>div>span{background:#e5f8d5;color:#387a5a;border-radius:8px;padding:10px;font:800 11px 'DM Sans'}.feature-rows p{margin:0}.feature-rows strong{display:block;font-size:13px;color:#203a42}.feature-rows small{font-size:11px;display:block}.seo-content{padding:29px 10px}.seo-content h2{font-size:20px}.practice-card{background:#e9f5ec}.practice-icon{border-radius:12px;background:#d2f47d;width:50px;height:50px;display:grid;place-items:center;font-size:22px}.practice-card .section-kicker{margin-top:28px;display:block;color:#387c58}.practice-card h3{font-size:21px;line-height:1.5}.practice-card .btn{margin-top:20px;white-space:normal;text-align:center}.side-notes{margin-top:16px}.side-notes strong{font-size:12px}.side-notes p{font-size:11px;color:#718787;padding-top:9px}.guide{max-width:850px;padding:85px 0 100px;min-height:67vh}.guide h1{font-size:37px;line-height:1.4}.guide h2{font-size:20px;margin-top:36px}.guide p{font-size:13px;color:#5d7673;line-height:2.1}.guide .btn{margin-top:18px}.not-found{min-height:60vh;padding-top:100px;padding-bottom:100px}.not-found h1{font-size:35px}.not-found p{color:#67808a;line-height:2}.not-found .btn{margin-top:25px}.empty-results{grid-column:1/-1;border:1px dashed #bdd8d0;padding:65px 30px;text-align:center;border-radius:17px;color:#667f7d;background:white;font-size:13px;line-height:1.8}
/* PDF composition is outside viewport, never served as a separate user-facing page. */
.pdf-workshop{position:absolute!important;left:-30000px!important;top:0!important;width:794px!important;z-index:-100!important;pointer-events:none}.pdf-render{width:720px;background:#fff;color:#1d3242;font-family:'Be Vietnam Pro',Arial,sans-serif;overflow:hidden}.pdf-card{font-family:'Be Vietnam Pro',sans-serif;background:#fff;border:1px solid #e4e9ee;border-radius:13px;margin:0 0 12px;padding:19px 21px 17px;color:#1b3445;line-height:1.65}.pdf-card .pdf-qno{display:inline-block;background:#e8f6dc;color:#2a7358;border-radius:6px;padding:5px 10px;font-size:12px;font-weight:800;margin-bottom:10px}.pdf-qtitle{font-size:14px;font-weight:700;line-height:1.75;margin:0 0 9px}.pdf-group{font-size:12px;color:#647a85;line-height:1.7;background:#f2f7f5;padding:13px;border-radius:8px;margin:8px 0}.pdf-option{margin:6px 0;display:flex;gap:8px;align-items:flex-start;font-size:12px;border:1px solid #edf0f0;border-radius:7px;padding:8px 11px;line-height:1.6;min-height:29px}.pdf-option b{min-width:16px}.pdf-option.correct{background:#ebf9db;border:1px solid #9fdb79;color:#27633d;font-weight:700}.pdf-option .answer-tag{margin-left:auto;color:#387a52;font-weight:800;font-size:10px;white-space:nowrap}.pdf-question-img,.pdf-explain-img{display:block;max-width:100%;max-height:440px;object-fit:contain;margin:11px auto;border-radius:7px}.pdf-explanation{border-left:4px solid #83ca8a;background:#f4f8f5;padding:14px 16px;border-radius:8px;font-size:12px;margin-top:13px;line-height:1.8;white-space:normal}.pdf-explanation strong{font-size:12px}.pdf-explanation p{margin:6px 0}.pdf-truths{display:flex;flex-direction:column;gap:7px}.pdf-tf-row{border:1px solid #e7edf0;border-radius:7px;padding:9px 11px;font-size:12px;line-height:1.7}.pdf-tf-answer{color:#287750;font-weight:800}.pdf-short-answer{background:#e7f9e0;border-radius:7px;padding:9px 11px;color:#28704e;font-size:12px;font-weight:800;margin-top:8px}.pdf-render .katex{font-size:1em}.pdf-card .katex{font-size:1.03em}
@media(max-width:1050px){.hero-grid{grid-template-columns:1.1fr .8fr}.hero-art{transform:scale(.85) rotate(-4deg)}.paper-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.detail-grid{grid-template-columns:1fr 260px;gap:35px}.detail-aside{width:250px;height:355px;min-height:355px}.detail-aside strong{font-size:18px}.detail-bottom{grid-template-columns:1fr 280px}}@media(max-width:760px){.shell{width:calc(100% - 34px)}.site-header{height:74px}.brand-symbol{width:36px;height:36px}.brand-type{font-size:21px}.nav nav{gap:12px}.nav nav a:not(.nav-practice){display:none}.nav-practice{padding:9px 11px;font-size:10px}.hero-grid{display:block;min-height:auto}.hero-copy{padding:74px 0 45px}.hero h1{font-size:39px;letter-spacing:-1.7px}.hero-copy>p{font-size:12px}.hero-art{display:none}.hero-proof{gap:11px;font-size:9px}.benefits{grid-template-columns:1fr;gap:28px;padding-top:40px;padding-bottom:40px}.catalog-section{padding:56px 0 65px}.section-head{align-items:flex-start}.section-head h2{font-size:29px}.section-head p{font-size:11px}.live-pill{font-size:9px;padding:9px;align-self:flex-start}.search-field{gap:7px;padding:0 8px}.search-field input{font-size:11px}.search-box{padding:6px}.search-box .btn{min-height:42px;padding:12px 14px;font-size:11px}.paper-grid{grid-template-columns:1fr;gap:12px}.paper-card{min-height:207px;padding:22px}.wide-banner-in{display:block}.wide-banner h2{font-size:29px}.wide-banner .btn{margin-top:20px}.foot-grid{grid-template-columns:1fr;gap:30px}.detail-hero{padding:30px 0 55px}.detail-grid{display:block;padding-top:39px}.detail-copy h1{font-size:30px}.detail-copy>p{font-size:12px}.detail-meta{gap:12px}.detail-aside{display:none}.download-actions{gap:10px}.download-actions .btn{flex:1;min-width:190px}.detail-bottom{display:block;padding-top:35px;padding-bottom:65px}.detail-panel,.practice-card,.side-notes{padding:25px}.right-panel{margin-top:20px}.guide{padding:60px 0 80px}.guide h1{font-size:29px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important;scroll-behavior:auto!important}}

/* V2: SSR articles, subject hubs, editorial posts; separate SEO identity from DGNL.vn */
.nav nav{gap:20px}.nav nav a{white-space:nowrap}
.category-section,.editorial-section{padding:72px 0}.editorial-section{background:#eff5f1}.category-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px;margin-top:28px}.category-card{display:flex;flex-direction:column;gap:12px;padding:26px;background:white;border:1px solid #e0ebe6;border-radius:18px;min-height:220px;transition:transform .2s,border-color .2s}.category-card:hover,.editorial-card:hover{transform:translateY(-4px);border-color:#a0cdb2}.category-sigil{width:max-content;background:#daf3c1;border-radius:9px;padding:10px 14px;font-weight:800;color:#34674e}.category-card strong{font-size:16px;line-height:1.6}.category-card small{font-size:12px;color:#6a817e}.category-card>b{margin-top:auto;color:#2f806c;font-size:12px}.editorial-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:28px}.editorial-card{background:white;border:1px solid #dceae5;border-radius:18px;padding:26px;transition:transform .2s,border-color .2s;display:flex;flex-direction:column;gap:12px}.editorial-card .pill{align-self:flex-start}.editorial-card h3{font-size:17px;line-height:1.6;margin:0}.editorial-card p{line-height:1.9;color:#617979;font-size:12px;margin:0;flex:1}.text-link{color:#287a65;font-size:12px;font-weight:800;display:inline-block}.editorial-list{max-width:1150px}.editorial-list .editorial-grid{grid-template-columns:repeat(2,minmax(0,1fr));margin-bottom:30px}.editorial-list .editorial-card p{max-width:100%}.category-page{max-width:1180px}.category-tabs{display:flex;gap:9px;flex-wrap:wrap;margin:22px 0 32px}.category-tabs>a{padding:11px 17px;border:1px solid #d5e4dd;background:#fff;font-size:12px;font-weight:700;border-radius:999px}.category-tabs>a.active,.category-tabs>a:hover{background:#173f49;color:#fff}.category-results{margin:24px 0}.pagination{display:flex;justify-content:center;gap:12px;margin:35px 0}.article-body{color:#3f5d5a;font-size:13px;line-height:2.05}.article-body h2{color:#173f49;margin:28px 0 8px;font-size:21px;line-height:1.5}.article-body h3{color:#234f52;margin:16px 0 6px;font-size:15px}.article-body p{margin:10px 0 15px;line-height:2}.article-body li{margin:9px 0}.article-body strong{color:#234f52}.seo-content.article-body{margin-top:22px;border-top:1px solid #e2ece5;padding-top:30px}.article-faq{padding:10px 22px;background:#f0f7f2;border-radius:15px}.article-end-link{margin:32px 0 0;padding:19px;background:#e7f3df;border-radius:12px;font-weight:800}.post-detail{max-width:820px}.post-detail .post-lead{font-size:15px;color:#567570;line-height:2}.post-detail .article-body{padding-top:18px}.post-cta{background:#eaf5e9;border-radius:15px;padding:23px;margin:28px 0}.post-cta .btn{margin-top:10px}.category-intro{margin-top:50px;padding:25px;border-top:1px solid #d6e7db}.site-header nav{min-width:0}
@media(max-width:1000px){.category-grid,.editorial-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.nav nav{gap:13px}}
@media(max-width:760px){.category-section,.editorial-section{padding:45px 0}.category-grid,.editorial-grid,.editorial-list .editorial-grid{grid-template-columns:1fr}.category-card{min-height:170px}.site-header{height:auto;min-height:74px}.nav{padding:12px 0;gap:14px;flex-wrap:wrap}.nav nav{width:100%;justify-content:space-between;gap:7px;overflow-x:auto;padding-bottom:2px}.nav nav a:not(.nav-practice){display:inline-flex;font-size:10px}.nav-practice{font-size:10px}.article-body h2{font-size:19px}}
