:root{--navy:#082c48;--blue:#0c5b8d;--sky:#cfeefe;--gold:#d7b56d;--cream:#f6f2ea;--ink:#102331;--muted:#667784;--white:#fff;--shadow:0 16px 40px rgba(5,31,50,.12)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Montserrat,Arial,sans-serif;color:var(--ink);background:#f8fbfd;line-height:1.6}.container{width:min(1180px,92vw);margin:auto}.site-header{position:sticky;top:0;z-index:50;background:rgba(5,31,50,.92);backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.08)}.header-in{height:74px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:12px;color:white;text-decoration:none;font-weight:700}.brand img{height:42px;max-width:150px;object-fit:contain}.nav{margin-left:auto;display:flex;gap:22px}.nav a{color:#e8f3f8;text-decoration:none;font-size:14px;font-weight:600}.hotline{margin-left:8px;padding:11px 18px;border:1px solid rgba(215,181,109,.7);border-radius:999px;color:#fff;text-decoration:none;font-weight:700;white-space:nowrap}.hero{min-height:760px;display:flex;align-items:center;position:relative;color:white;background:linear-gradient(90deg,rgba(4,24,41,.85) 0%,rgba(4,24,41,.55) 42%,rgba(4,24,41,.12) 72%),url('assets/hero.jpg') center/cover no-repeat}.hero:after{content:"";position:absolute;inset:auto 0 0;height:180px;background:linear-gradient(transparent,#f8fbfd)}.hero .container{position:relative;z-index:1}.eyebrow{letter-spacing:.22em;text-transform:uppercase;font-size:13px;font-weight:800;color:#f2cf7c}.hero h1{font-size:clamp(52px,7vw,96px);line-height:.95;margin:18px 0 22px;max-width:840px}.hero h1 em{display:block;font-family:"Playfair Display",Georgia,serif;font-weight:400;color:#f1d38b}.lead{font-size:20px;max-width:720px;color:#eef6f9}.cta-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:15px 22px;border-radius:12px;text-decoration:none;font-weight:800;transition:.25s}.btn.primary{background:linear-gradient(90deg,#e5c36f,#f0d890);color:#082c48;box-shadow:0 0 0 0 rgba(240,216,144,.6);animation:pulse 2.6s infinite}.btn.secondary{border:1px solid rgba(255,255,255,.65);color:white;background:rgba(255,255,255,.06)}@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(240,216,144,.35)}50%{box-shadow:0 0 0 12px rgba(240,216,144,0)}}.quick{margin-top:-54px;position:relative;z-index:3}.quick-grid{display:grid;grid-template-columns:repeat(5,1fr);background:white;border-radius:22px;box-shadow:var(--shadow);overflow:hidden}.quick-item{padding:24px;border-right:1px solid #e9eef1}.quick-item:last-child{border:0}.quick-item b{display:block;font-size:28px;color:var(--blue)}.quick-item span{font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}.section{padding:92px 0}.section.alt{background:#eef7fb}.section.dark{background:linear-gradient(135deg,#082c48,#0e557e);color:white}.section-head{max-width:800px;margin-bottom:34px}.section-head h2{font-size:clamp(38px,4.5vw,64px);line-height:1.05;margin:10px 0}.section-head h2 em{font-family:"Playfair Display",Georgia,serif;font-weight:400;color:#2d86b3}.section.dark .section-head h2 em{color:#f0cf7d}.kicker{font-size:12px;letter-spacing:.25em;text-transform:uppercase;font-weight:800;color:#b68a37}.two-col{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}.card{background:white;border-radius:22px;box-shadow:var(--shadow);overflow:hidden}.media img,.media video{display:block;width:100%;height:auto}.copy p{font-size:18px;color:#536572}.copy strong{color:#082c48}.facts{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:26px}.fact{background:#fff;border:1px solid #dfe9ef;border-radius:16px;padding:18px}.fact b{display:block;font-size:22px;color:#0c5b8d}.amenities{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:18px}.amenity{position:relative;border-radius:20px;overflow:hidden;min-height:280px;background:#dcecf4}.amenity img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}.amenity:after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 35%,rgba(4,31,49,.85))}.amenity .caption{position:absolute;z-index:2;left:20px;right:20px;bottom:18px;color:white}.amenity .caption b{font-size:24px}.floor-wrap{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center}.floor-card{background:white;border-radius:22px;padding:16px;box-shadow:var(--shadow)}.floor-card img{width:100%;border-radius:14px}.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.news-card{background:white;border-radius:18px;padding:22px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:10px}.news-card h3{font-size:20px;line-height:1.35;margin:0}.news-card p{color:#687883;font-size:14px}.news-card a{margin-top:auto;color:#0c5b8d;font-weight:800;text-decoration:none}.video-wrap{border-radius:22px;overflow:hidden;background:#001a2c;box-shadow:var(--shadow)}.video-wrap video{width:100%;display:block}.news-strip{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}.news-strip a{padding:9px 12px;border-radius:999px;background:#e9f5fb;color:#0b5078;text-decoration:none;font-size:13px;font-weight:700}.footer{background:#061f33;color:#dbe7ee;padding:56px 0 28px}.footer-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr;gap:34px}.footer a{color:#f0ce78}.footer small{display:block;margin-top:28px;color:#9fb3bf;border-top:1px solid rgba(255,255,255,.12);padding-top:22px}.popup{position:fixed;inset:0;background:rgba(0,22,38,.58);display:none;align-items:center;justify-content:center;z-index:100}.popup.open{display:flex}.popup-card{width:min(520px,92vw);background:white;border-radius:24px;padding:28px;box-shadow:0 22px 80px rgba(0,0,0,.24)}.popup-card h3{font-size:32px;margin:0 0 8px}.popup-card input,.popup-card select{width:100%;padding:13px 14px;margin-top:10px;border:1px solid #d8e3e9;border-radius:12px;font:inherit}.popup-close{float:right;border:0;background:#eef4f7;width:36px;height:36px;border-radius:50%;font-size:20px}.sticky-mobile{display:none}.menu-toggle{display:none}.article-hero{padding:110px 0 60px;background:linear-gradient(135deg,#072d48,#0a6b9e);color:white}.article-hero h1{font-size:clamp(42px,6vw,78px);line-height:1.02;margin:12px 0}.article-body{padding:58px 0 90px}.article-body .content{max-width:820px}.article-body p{font-size:18px;color:#425663}.article-body .source-list a{display:block;margin:10px 0;color:#0c5b8d;font-weight:700;text-decoration:none}@media(max-width:900px){.nav{display:none}.menu-toggle{display:block;margin-left:auto;background:transparent;border:1px solid rgba(255,255,255,.25);color:white;border-radius:10px;padding:8px 11px}.header-in{height:68px}.hero{min-height:690px;background-position:62% center}.hero h1{font-size:54px}.quick-grid{grid-template-columns:repeat(2,1fr)}.quick-item:nth-child(2n){border-right:0}.two-col,.floor-wrap{grid-template-columns:1fr}.amenities{grid-template-columns:1fr 1fr}.amenity:first-child{grid-column:1/-1}.news-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.sticky-mobile{display:flex;position:fixed;z-index:70;bottom:10px;left:10px;right:10px;gap:10px}.sticky-mobile a{flex:1;padding:14px;border-radius:13px;text-align:center;text-decoration:none;font-weight:800;box-shadow:var(--shadow)}.sticky-mobile .call{background:#e4c26e;color:#062942}.sticky-mobile .zalo{background:#0c5b8d;color:#fff}}@media(max-width:560px){.hero{min-height:720px}.hero h1{font-size:46px}.lead{font-size:17px}.quick{margin-top:-30px}.quick-grid{grid-template-columns:1fr 1fr}.quick-item{padding:18px}.quick-item b{font-size:22px}.section{padding:70px 0}.amenities{grid-template-columns:1fr}.amenity:first-child{grid-column:auto}.facts{grid-template-columns:1fr}.brand span{display:none}.hotline{display:none}}

/* V1.1 refinements */
body{font-family:Montserrat,"Arial",sans-serif}.hero h1{font-size:clamp(44px,5.6vw,78px);max-width:760px}.hero h1 em{font-family:Montserrat,Arial,sans-serif;font-size:.58em;line-height:1.18;margin-top:12px;font-weight:600}.section-head h2{font-size:clamp(34px,4vw,56px)}
.site-header,.section,.quick-item,.card,.fact,.amenity,.news-card,.partner-card,.lead-form{transition:transform .35s ease,box-shadow .35s ease,border-color .35s ease,background .35s ease}.quick-item:hover,.fact:hover,.news-card:hover,.partner-card:hover{transform:translateY(-6px);box-shadow:0 18px 42px rgba(5,31,50,.14)}.amenity:hover img{transform:scale(1.035)}.amenity img{transition:transform .6s ease}.nav a{position:relative}.nav a:after{content:"";position:absolute;left:0;right:100%;bottom:-6px;height:2px;background:#f0cf7d;transition:right .25s ease}.nav a:hover:after{right:0}
.call-glow,.hotline,.footer-call{position:relative;overflow:hidden}.call-glow:after,.hotline:after{content:"";position:absolute;top:-50%;left:-70%;width:32%;height:200%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.75),transparent);transform:rotate(22deg);animation:shine 3.2s infinite}@keyframes shine{0%{left:-70%}55%,100%{left:135%}}.hotline:hover,.call-glow:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(240,207,125,.25)}.outline-dark{border:1px solid #0c5b8d;color:#0c5b8d;background:#fff}.partner-card{border-radius:22px;overflow:hidden;box-shadow:var(--shadow);background:white}.partner-card img{display:block;width:100%;height:auto}.partner-section{background:#f7fbfd}.news-card.featured{grid-column:span 2}.news-feature .section-head p{font-size:18px;color:#536572;max-width:880px}
.lead-form{background:#0b483c;color:white;border-radius:22px;padding:28px;box-shadow:var(--shadow)}.lead-form h3{font-size:30px;margin:0 0 20px}.lead-form label{display:block;font-size:13px;letter-spacing:.04em;font-weight:800;color:#e2bc61;margin-top:14px}.lead-form input,.lead-form select,.lead-form textarea{width:100%;margin-top:8px;padding:15px 16px;border:0;border-radius:11px;background:#fff;color:#334;font:inherit;outline:none}.lead-form textarea{resize:vertical}.lead-form .btn{width:100%;border:0;margin-top:16px}.lead-form small{display:block;color:#b8d5cf;margin-top:14px}.form-two{display:grid;grid-template-columns:1fr 1fr;gap:14px}.popup .lead-form{width:min(690px,94vw);max-height:92vh;overflow:auto}.popup-form .popup-close{float:right;background:rgba(255,255,255,.12);color:#fff}.footer-call{display:inline-block;font-size:19px;font-weight:800;text-decoration:none;padding:8px 14px;border:1px solid rgba(240,206,120,.45);border-radius:999px}.sticky-mobile .call{background:linear-gradient(90deg,#e2bc61,#f2d989)}
@media(max-width:900px){.hero h1{font-size:46px}.news-card.featured{grid-column:auto}.form-two{grid-template-columns:1fr}.partner-section .two-col{gap:26px}.lead-form{padding:22px}.nav{position:absolute;top:68px;left:4vw;right:4vw;flex-direction:column;background:#082c48;padding:18px;border-radius:16px;box-shadow:var(--shadow)}}
@media(max-width:560px){.hero h1{font-size:38px;line-height:1.02}.hero h1 em{font-size:.62em}.section-head h2{font-size:34px}.lead-form h3{font-size:25px}.hotline{display:none}}


/* Serena Riverside V1.3 - Legacy 66 typography + Serena blue system */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700;800&family=Playfair+Display:ital,wght@0,500;1,500&display=swap');
:root{--serena:#168ec3;--serena-dark:#07557d;--serena-deep:#062d49;--serena-soft:#eaf7fd;--serena-gold:#e6c579}
body{font-family:Montserrat,Arial,sans-serif;letter-spacing:-.005em}.hero h1,.section-head h2,.distributor-copy h2,.block-title h3{font-family:Montserrat,Arial,sans-serif;font-weight:700;letter-spacing:-.045em}.hero h1 em,.section-head h2 em,.distributor-copy h2 em{font-family:"Playfair Display",Georgia,serif;font-style:italic;font-weight:500;letter-spacing:-.02em}.hero h1 em{font-size:.64em}.section-head h2{font-size:clamp(36px,4vw,58px)}.section-intro{font-size:17px;color:rgba(255,255,255,.76);max-width:840px}.section-intro.dark-text{color:#536572}
.nav a,.btn,.tab-btn,.tower-tab,.subtab{font-family:Montserrat,Arial,sans-serif}.btn,.hotline,.tab-btn,.tower-tab,.subtab,.unit-card,.plan-block,.tab-panel,.distributor-visual,.distributor-copy,.lead-form,.footer-vxs{transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease,background .28s ease,opacity .28s ease}.btn:hover,.tab-btn:hover,.tower-tab:hover,.subtab:hover{transform:translateY(-2px)}.plan-block:hover,.distributor-visual:hover,.unit-card:hover{transform:translateY(-5px);box-shadow:0 22px 50px rgba(5,55,86,.15)}
/* lead form: Serena blue */
.lead-form{background:linear-gradient(145deg,#0874a7 0%,#0b96c9 55%,#07557d 100%);border:1px solid rgba(255,255,255,.18);box-shadow:0 22px 60px rgba(5,63,94,.24)}.lead-form label{color:#fff}.lead-form small{color:#d8f2ff}.lead-form input,.lead-form select,.lead-form textarea{box-shadow:inset 0 0 0 1px rgba(7,85,125,.08)}
/* shine effect */
.shine-btn,.btn.primary,.hotline,.sticky-mobile a{position:relative;overflow:hidden}.shine-btn:after,.btn.primary:after,.hotline:after,.sticky-mobile a:after{content:"";position:absolute;top:-60%;left:-80%;width:34%;height:220%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.82),transparent);transform:rotate(20deg);animation:serenaShine 3.4s infinite;pointer-events:none}@keyframes serenaShine{0%{left:-80%}48%,100%{left:140%}}
/* tab plans */
.amenities-master{background:linear-gradient(135deg,#07557d,#0d95c8 65%,#0b709f)}.tab-bar,.tower-tabs,.subtabs{display:flex;gap:10px;flex-wrap:wrap;margin:22px 0 24px}.tab-btn,.tower-tab,.subtab{appearance:none;border:1px solid rgba(12,91,141,.2);background:#fff;color:#07557d;border-radius:999px;padding:11px 16px;font-size:13px;font-weight:800;cursor:pointer}.amenities-master .tab-btn{background:rgba(255,255,255,.11);border-color:rgba(255,255,255,.3);color:#fff}.tab-btn.active,.tower-tab.active,.subtab.active{background:linear-gradient(110deg,#0c79ad,#18a4d8);color:#fff;border-color:transparent;box-shadow:0 10px 24px rgba(5,104,151,.22)}.amenities-master .tab-btn.active{background:#fff;color:#07557d}.tab-panel{display:none;animation:fadePlan .45s ease}.tab-panel.active{display:block}@keyframes fadePlan{from{opacity:.15;transform:translateY(8px)}to{opacity:1;transform:none}}.tab-panel>img{width:100%;border-radius:18px;display:block;background:#fff;box-shadow:0 18px 50px rgba(3,35,56,.16)}.plan-note{display:flex;gap:12px;flex-direction:column;padding:18px 4px 0}.plan-note b{font-size:20px}.plan-note span{color:rgba(255,255,255,.78)}
.floor-master{background:#f6fbfe}.plan-block{background:#fff;border:1px solid #dcecf4;border-radius:24px;padding:28px;margin-top:24px;box-shadow:0 14px 40px rgba(5,54,84,.08)}.apartment-block{margin-top:32px}.block-title{display:flex;gap:18px;align-items:flex-start}.block-title>span{flex:0 0 48px;width:48px;height:48px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(145deg,#0d8fc2,#096a99);color:#fff;font-weight:800}.block-title h3{font-size:28px;margin:0 0 5px}.block-title p{margin:0;color:#667784}.floor-panels .tab-panel>img{max-height:760px;object-fit:contain}.tower-tabs{margin-top:30px}.tower-tab{font-size:16px;padding:13px 30px}.tower-panel{display:none}.tower-panel.active{display:block;animation:fadePlan .35s ease}.subtabs{margin:16px 0 20px}.apartment-floor-panel{display:none}.apartment-floor-panel.active{display:block}.floor-panel-head{display:flex;justify-content:space-between;gap:20px;align-items:center;margin:12px 0 18px}.floor-panel-head b,.floor-panel-head span{display:block}.floor-panel-head b{font-size:22px;color:#07557d}.floor-panel-head span{color:#73828c;font-size:14px}.mini-link{color:#0879ad;font-weight:800;text-decoration:none;font-size:13px}.unit-gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.unit-card{display:block;text-decoration:none;color:#183744;border:1px solid #e0ebf0;border-radius:16px;background:#fff;overflow:hidden}.unit-card img{display:block;width:100%;aspect-ratio:4/3;object-fit:contain;background:#f6fafc}.unit-card span{display:block;padding:10px 12px;font-size:12px;font-weight:800;color:#0a6f9f}.cta-center{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:30px}.blue-outline{border:1px solid #0c7fb2;color:#0b6b99;background:#fff}.white-btn{background:#fff;color:#066c9d}
/* distributor Legacy-style, Serena colors */
.distributor-section{background:linear-gradient(135deg,#062d49 0%,#075d86 48%,#0c8fbd 100%);color:#fff}.distributor-grid{display:grid;grid-template-columns:.9fr 1.15fr;gap:58px;align-items:center}.distributor-visual{border-radius:120px 16px 16px 16px;overflow:hidden;box-shadow:0 30px 70px rgba(0,0,0,.22);background:#fff}.distributor-visual img{width:100%;height:auto;display:block}.distributor-copy h2{font-size:clamp(38px,4.4vw,64px);line-height:1.04;margin:12px 0 28px}.distributor-copy h2 em{display:block;color:#e6c579}.distributor-copy p{font-size:18px;color:rgba(255,255,255,.83)}.distributor-copy strong{color:#fff}.distributor-badge{margin:26px 0;padding:20px 22px;border-left:3px solid var(--serena-gold);background:rgba(255,255,255,.10)}.distributor-badge small,.distributor-badge b{display:block}.distributor-badge small{color:#f0d58f;letter-spacing:.16em;font-weight:800;margin-bottom:5px}.distributor-badge b{font-size:20px}.distributor-section .btn.primary{background:linear-gradient(110deg,#e0bd63,#f2dc9d,#e0bd63);color:#062d49}
/* footer */
.new-footer{background:#05283f}.new-footer .footer-grid{grid-template-columns:1.15fr .6fr 1.25fr;align-items:start}.footer-brand img{height:62px;width:auto;margin-bottom:18px}.footer-brand h3{font-size:20px;color:#fff;margin:0 0 12px;max-width:420px}.new-footer p{color:#c8dce6}.footer-vxs{border-left:1px solid rgba(255,255,255,.12);padding-left:26px}.footer-vxs>img{height:70px;width:auto;max-width:230px;object-fit:contain;background:#fff;border-radius:10px;padding:8px;margin-bottom:14px}.footer-vxs>b{display:block;color:#fff;margin-bottom:12px}.new-footer a{color:#f0cf7d}.footer-vxs .footer-call{font-size:17px;padding:5px 12px;margin:8px 0}
@media(max-width:900px){.distributor-grid{grid-template-columns:1fr}.distributor-visual{border-radius:78px 14px 14px 14px}.unit-gallery{grid-template-columns:repeat(2,1fr)}.new-footer .footer-grid{grid-template-columns:1fr}.footer-vxs{border-left:0;padding-left:0}.floor-panel-head{align-items:flex-start;flex-direction:column}}
@media(max-width:560px){.plan-block{padding:18px;border-radius:18px}.block-title h3{font-size:23px}.tab-bar,.subtabs{flex-wrap:nowrap;overflow:auto;padding-bottom:4px}.tab-btn,.subtab{white-space:nowrap}.unit-gallery{grid-template-columns:1fr 1fr;gap:8px}.unit-card span{font-size:10px;padding:8px}.tower-tab{flex:1}.cta-center{display:grid}.cta-center .btn{width:100%}.distributor-copy p{font-size:16px}.distributor-copy h2{font-size:38px}}