@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@400;500;600;700;800&family=DM+Sans:wght@400;500;600;700&display=swap');
:root{--ink:#073648;--ink2:#315362;--teal:#006379;--teal2:#009ca6;--orange:#f38234;--cream:#f7f8f3;--line:#dfeaec;--muted:#617a85;--paper:#fff;--wide:1216px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fcfdfc;color:var(--ink);font:15px/1.9 'Be Vietnam Pro',sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit}button{font:inherit;cursor:pointer}img{max-width:100%}main{overflow:hidden}.container{max-width:var(--wide);margin:0 auto;padding-left:clamp(20px,3.5vw,48px);padding-right:clamp(20px,3.5vw,48px)}.top{height:86px;display:flex;align-items:center;justify-content:space-between;gap:28px;position:sticky;top:0;z-index:80;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-bottom:1px solid #e6efee}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;flex-shrink:0}.brand 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.hero-photo{position:relative;margin:0;width:min(100%,470px);height:520px;overflow:hidden;border-radius:28px 80px 28px 80px;box-shadow:0 45px 75px #02283755;transform:rotate(2deg);border:7px solid #ffffff1c}.hero-photo img{width:100%;height:100%;object-fit:cover;display:block}.hero-photo:after{content:'';position:absolute;inset:50% 0 0;background:linear-gradient(transparent,#002b3b88);pointer-events:none}.hero-photo figcaption{position:absolute;bottom:20px;left:21px;color:#fff;font-size:11px;z-index:1;letter-spacing:.03em}.project-place.has-photo{color:white;padding:0;display:block;background:#0d485d;border:0}.project-place.has-photo img.project-image{width:100%;height:100%;position:absolute;inset:0;object-fit:cover;transition:transform .5s}.project-place.has-photo:hover img.project-image{transform:scale(1.04)}.project-place.has-photo:after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 24%,#002d3ecf 100%)}.project-place.has-photo .photo-label{position:absolute;z-index:2;bottom:22px;left:25px;right:25px;display:flex;flex-direction:column;gap:8px}.project-place.has-photo .photo-label strong{font-size:22px;color:white}.project-place.has-photo .photo-label small{line-height:1.6;color:#d4edef}.project-place.has-photo:first-child .photo-label strong{font-size:30px}.project-place.has-photo .place-mark{display:none}@media(max-width:850px){.hero-photo{height:320px;width:min(88%,460px);border-radius:22px 55px 22px 55px;transform:rotate(1deg)}}@media(max-width:610px){.hero-photo{height:245px;width:88%;border-radius:20px 45px 20px 45px}.hero-photo figcaption{bottom:12px;left:14px}.project-place.has-photo:first-child .photo-label strong{font-size:23px}}.brand img{width:67px;height:67px;object-fit:contain}.footer-brand img{width:145px;height:auto;max-height:none;background:transparent;border-radius:0;padding:0}.hero-photo{filter:saturate(1.04)}.visual-panel img{border-radius:14px;background:white;padding:10px}@media(max-width:610px){.brand img{width:45px;height:49px}.footer-brand img{width:155px;height:auto}}
.chapter-index{padding-top:40px;padding-bottom:5px}.toc-details{background:#f3f9f8;border:1px solid #dcebec;border-radius:20px;padding:20px 24px}.toc-summary{font-size:14px;font-weight:850;color:#006379;cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:20px}.toc-summary::after{content:'⌄';font-size:21px;color:#f38234}.toc-details[open] .toc-summary::after{transform:rotate(180deg)}.toc-summary::-webkit-details-marker{display:none}.toc-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:19px}.toc-link{background:white;border:1px solid #d1e5e6;border-radius:30px;text-decoration:none;color:#40626b;font-size:11px;font-weight:750;padding:8px 12px;line-height:1.4;transition:all .2s}.toc-link:hover{background:#006379;color:white;border-color:#006379}@media(max-width:610px){.chapter-index{padding-top:24px}.toc-details{padding:16px}.toc-links{gap:6px}.toc-link{font-size:11px}}
/* v5 — polished long-form reading experience; complete editorial text remains accessible. */
.letter-paper{position:relative;max-width:1050px;margin:38px auto 0;background:#fff;border:1px solid #dfe9e9;box-shadow:0 20px 65px #093d5410;border-radius:28px;padding:clamp(26px,5vw,75px);overflow:hidden}
.letter-paper:before{content:'“';position:absolute;right:28px;top:0;font-family:Georgia,serif;font-size:210px;line-height:1;color:#e2f4f3;pointer-events:none}
.letter-prose{position:relative;z-index:1;max-width:100%;color:#253f50;font-size:clamp(14px,1.23vw,16px);line-height:2.05;text-align:justify;text-wrap:pretty}
.letter-prose p{margin:0 0 21px}.letter-prose p:first-child{font-size:18px;color:#005f71;font-weight:750;text-align:left}.letter-prose p:last-child{margin-top:30px;font-weight:750;color:#006b80;text-align:right}
.letter-signature{position:relative;display:flex;align-items:center;justify-content:flex-end;gap:13px;margin-top:30px;font-size:12px;color:#006d80;text-align:right}
.letter-signature .signature-mark{width:61px;height:61px;object-fit:contain}
.story-split{grid-template-columns:1.2fr .8fr;align-items:start;gap:5%}
.story-split .prose{line-height:2.07;text-align:justify;text-wrap:pretty}
.story-split .prose p{margin-bottom:18px}
.story-split .prose p:nth-child(2){background:#e9f5f6;border-left:4px solid #018197;color:#075268;font-weight:650;padding:20px 22px;border-radius:0 14px 14px 0;text-align:left}
.visual-panel:has(.context-photo){aspect-ratio:4/5;min-height:480px;padding:0;background:#e4f3f4}
.visual-panel .context-photo{display:block;width:100%;height:100%;max-width:none;max-height:none;object-fit:cover;position:absolute;inset:0;padding:0;border-radius:0}
.visual-panel:has(.context-photo) .number-badge{z-index:4;color:white;background:#063849dd;padding:8px 12px;border-radius:30px}
.visual-panel:has(.context-photo):after{inset:auto 0 0 0;width:auto;height:160px;background:linear-gradient(transparent,#023747a8);border:none;border-radius:0}
.meaning-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:40px;align-items:start}
.meaning-prose{background:#fff;border:1px solid #dfeaec;border-radius:24px;padding:clamp(22px,3.4vw,42px);line-height:2.08;color:#254b5b}
.meaning-prose p{padding-left:22px;border-left:3px solid #62c1c4;margin:0 0 28px;text-align:justify}
.meaning-prose p:nth-child(2){border-color:#f48f42}.meaning-prose p:last-child{margin-bottom:0}
.meaning-visual{position:sticky;top:105px;overflow:hidden;border-radius:25px;background:#063f54;box-shadow:0 25px 45px #073d5415}
.meaning-photo{width:100%;height:min(48vw,470px);max-height:470px;min-height:310px;display:block;object-fit:cover}
.meaning-highlight{padding:31px;margin:0;color:white;background:#063f54;font-weight:800;font-size:clamp(19px,2.1vw,26px);line-height:1.65}
.sdg-strip{display:flex;flex-wrap:wrap;align-items:stretch;gap:11px;margin-top:32px;padding:22px;border-radius:20px;background:#eaf5f5;border:1px solid #d2e8e8}
.sdg-intro{width:100%;font-size:12px;font-weight:850;color:#0d5f72;margin-bottom:4px}
.sdg-pill{display:flex;align-items:center;gap:13px;flex:1 1 190px;background:white;border-radius:12px;min-height:76px;overflow:hidden;border:1px solid #dce9ea;padding:12px}
.sdg-pill b{font-size:28px;color:white;width:47px;height:47px;border-radius:10px;display:grid;place-items:center;flex:0 0 auto}
.sdg-pill span{font-size:12px;font-weight:800;line-height:1.55;color:#315966}
.sdg-4 b{background:#c5192d}.sdg-10 b{background:#dd1367}.sdg-17 b{background:#19486a}
.hero-photo{transition:opacity .6s,transform .6s}
.hero-photo img{transition:opacity .5s}
.hero-controls{display:flex;gap:8px;align-items:center;margin-top:20px}
.hero-controls button{background:#ffffff21;color:white;border:1px solid #ffffff77;width:37px;height:37px;border-radius:50%;font-size:17px;font-weight:800;transition:background .2s}
.hero-controls button:hover,.hero-controls button:focus-visible{background:#ffffff4d}
.hero-photo img{background:#0b5366}
.hero-photo img[src=""]{opacity:0}
@media(min-width:1000px){#thu-ngo .heading{margin-left:5%;}#boi-canh .heading{max-width:970px}}
@media(max-width:960px){.meaning-grid{grid-template-columns:1fr}.meaning-visual{position:static}.meaning-photo{height:350px}.story-split{grid-template-columns:1fr}.visual-panel:has(.context-photo){aspect-ratio:16/9;min-height:300px;max-height:420px}.letter-paper{padding:35px}.letter-prose{text-align:left}}
@media(max-width:610px){.letter-paper{margin-top:15px;padding:25px 20px;border-radius:17px}.letter-prose{font-size:14px;line-height:1.9}.letter-prose p{margin-bottom:17px}.letter-signature{font-size:10px}.meaning-prose{padding:20px}.meaning-prose p{padding-left:14px}.meaning-photo{min-height:245px;height:260px}.meaning-highlight{padding:20px}.sdg-strip{padding:13px}.sdg-pill{flex-basis:100%}.hero-controls{margin-top:18px}.hero-grid{padding-bottom:40px}}

.brand-copy b{font-size:inherit;font-weight:850;display:block;line-height:1.32;max-width:280px}.brand-copy span{max-width:280px;line-height:1.4}.hero-dots{margin-top:0}.hero-controls .hero-dots{margin:0 8px}.hero-controls .hero-dot{height:5px;width:35px;min-height:5px}.hero-controls .hero-dot[aria-current=true]{width:53px}@media(max-width:610px){.brand-copy b{font-size:11px;max-width:180px}.brand-copy span{font-size:8px;max-width:180px}}

/* Hero's first line is the project identity; the second line is the actual message. */
.hero h1{max-width:720px;line-height:1.12}
.hero h1 #heroLine1{display:block;font-size:clamp(18px,2vw,27px);line-height:1.45;letter-spacing:.005em;font-weight:750;color:#bbeced;margin-bottom:15px;text-transform:none}
.hero h1 #heroLine2{display:block;font-size:clamp(39px,5.5vw,73px);line-height:1.12;letter-spacing:-.05em;max-width:760px;text-wrap:balance}
.story-split .visual-panel{position:sticky;top:106px}
@media(max-width:960px){.story-split .visual-panel{position:relative;top:auto}}
@media(max-width:610px){.hero h1{margin-top:15px}.hero h1 #heroLine1{font-size:17px;line-height:1.5}.hero h1 #heroLine2{font-size:clamp(37px,10vw,53px);line-height:1.16}.hero p{line-height:1.85}}

.context-photo.fallback-logo,.meaning-photo.fallback-logo,.project-image.fallback-logo,.hero-photo img.fallback-logo{object-fit:contain!important;background:#effafa;padding:35px;filter:none}.hero-photo img.fallback-logo{background:#ffffffef;padding:55px}