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/* Fanpage 2026: ánh kim, sắc đỏ xưởng, album lật ảnh. */
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/* Thang chữ biên tập: Noto Serif Unicode tiếng Việt, tự lưu trên hosting. */
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h3{font-size:clamp(1.18rem,1.5vw,1.4rem);line-height:1.35;font-weight:700;letter-spacing:normal}.hero h1{font-size:clamp(2.75rem,4.4vw,4.25rem);line-height:1.12;letter-spacing:-.025em;text-transform:none}.hero h1 em{font-size:.7em;letter-spacing:normal;margin-top:.3em}.hero-lead,.showcase-heading>p:not(.eyebrow),.contact-grid>div:first-child>p:last-child{font-size:1.1rem;line-height:1.75}.section-heading>p,.product-body p,.process-grid p,.material-list p,.faq-items details p,.contact-grid p,.knowledge-grid>div:first-child>p:not(.eyebrow),.detail-body p{font-size:1.0625rem;line-height:1.72}.product-body a,.nav-contact,.button,.showcase-cta{font-size:.95rem}.eyebrow,.hero-signal,.hero-notes,.book-label,.intro-strip{font-size:.85rem;letter-spacing:.07em}.product-no,.footer-bottom{font-size:.83rem}.section{padding:clamp(4.25rem,7vw,6.25rem) 0}.hero-grid{min-height:620px}.hero-copy{padding-top:65px;padding-bottom:45px}.hero-actions{margin-bottom:45px}.hero-stamp b{font-family:var(--ui)}.showcase h2 em{font-style:normal}.brand-mark,.rail-icon{font-family:var(--ui)}.contact-phone{font-family:var(--ui);font-size:clamp(1.65rem,2.6vw,2.35rem);letter-spacing:normal}.contact-extra{font-size:1rem;line-height:1.7;border-top:1px solid #d7dadd;padding-top:18px;margin-top:22px}.contact-extra a{text-decoration:underline;text-underline-offset:3px}.contact-rail{position:fixed;z-index:50;right:18px;bottom:23px;display:grid;gap:8px}.contact-rail a{display:flex;align-items:center;gap:10px;width:188px;min-height:56px;padding:8px 10px;color:#fff;border-radius:10px;box-shadow:0 7px 25px #0007}.contact-rail b,.contact-rail small{display:block;line-height:1.22}.contact-rail b{font-size:.78rem}.contact-rail small{font-size:.84rem;margin-top:3px;font-weight:700}.rail-call{background:#d82c27}.rail-zalo{background:#1474c9}.rail-icon{display:grid;place-items:center;flex:none;width:38px;height:38px;border-radius:50%;background:#fff2;font-size:1.45rem;font-weight:900}.material-request{background:#e9e2dc;border-top:1px solid #d5d0c7;border-bottom:1px solid #d5d0c7;padding:22px 0}.material-request .wrap{display:flex;align-items:center;gap:18px}.material-request span{font-size:2rem;color:#ba2a27}.material-request p{margin:0;flex:1}.material-request a{font-family:var(--ui);font-size:.9rem;font-weight:700;color:#aa2925}.breadcrumbs{display:flex;gap:10px;color:#657078;font-size:.9rem;padding:18px 0}.breadcrumbs a:hover{color:#d82c27}.detail-hero{background:radial-gradient(circle at 15% 20%,#8f242044,transparent 35%),#0c121a;color:#fff}.detail-grid{display:grid;grid-template-columns:1fr .9fr;align-items:center;gap:5rem;padding:4rem 0}.detail-hero h1{max-width:680px}.detail-lead{font-size:1.2rem;color:#d5dcdf;max-width:650px}.detail-hero figure{margin:0}.detail-hero figure img{width:100%;height:440px;object-fit:cover}.detail-hero figcaption{font-size:.84rem;color:#b9c3c8;margin-top:10px}.detail-hero .hero-actions{margin:25px 0 0}.detail-body{background:#fff;padding:4.5rem 0}.detail-body-grid{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:6rem}.detail-body article{max-width:730px}.detail-body article h2{margin:0 0 18px}.detail-body article p{margin:0 0 2rem}.detail-spec{padding:25px;background:#f4f5f3;border-left:4px solid #e3322c}.detail-spec h3{margin-bottom:10px}.detail-spec ul{padding-left:23px;margin:8px 0 22px}.detail-spec li{margin:5px 0}.detail-spec a{font-weight:700;color:#bf2925}.detail-aside{background:#14212a;color:#fff;padding:27px;align-self:start;position:sticky;top:100px}.detail-aside>span{color:#ffb64d;font-size:.8rem;letter-spacing:.1em;font-weight:700}.detail-aside h2{font-size:1.5rem;margin:16px 0}.detail-aside p{color:#d2dbdf;font-size:1rem}.detail-aside a{display:block;border-top:1px solid #ffffff30;padding:13px 0;font-family:var(--ui);font-size:.9rem}.detail-aside strong{font-size:1.2rem}.related-section{background:#f0f2f2;padding:4rem 0}.related-section h2{margin-bottom:25px}.related-links{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.related-links a{background:#fff;border:1px solid #dce2e3;padding:14px 18px;font-size:.95rem;font-weight:700;display:flex;justify-content:space-between;gap:10px}.related-links a:hover{border-color:#c42c25;color:#b72b26}@media(max-width:800px){.detail-grid,.detail-body-grid{grid-template-columns:1fr;gap:2rem}.detail-grid{padding:3rem 0}.detail-hero figure img{height:min(90vw,450px)}.detail-aside{position:static}.contact-rail{right:10px;bottom:10px}.contact-rail a{width:54px;height:54px;min-height:54px;border-radius:50%;padding:8px;justify-content:center}.contact-rail a>span+span{position:absolute;left:-9999px}.contact-rail .rail-icon{background:none}.material-request .wrap{flex-wrap:wrap}.material-request a{margin-left:53px}.hero h1{font-size:clamp(2.5rem,8.5vw,3.7rem)}}@media(max-width:480px){.related-links{grid-template-columns:1fr}.brand{font-size:1.08rem}.hero-signal{font-size:.76rem}.hero-ring{display:none}.product-body{padding:22px}.product-body p{font-size:1rem}.process-grid p{font-size:1rem}.contact-rail{bottom:12px;right:12px}}

/* 2026 upgrade: surface, application, configurator */
.surface-section{background:#0b1117;color:#eef2f3}.surface-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:#ffffff24;border:1px solid #ffffff24}.surface-grid article{min-height:260px;padding:34px 28px;background:linear-gradient(145deg,#111b22,#0b1117);position:relative;overflow:hidden}.surface-grid article:before{content:"";position:absolute;inset:-40% -60%;background:linear-gradient(110deg,transparent 43%,#ffffff13 50%,transparent 57%);transform:translateX(-35%);transition:transform .7s ease}.surface-grid article:hover:before{transform:translateX(35%)}.surface-grid article>span{font-family:var(--ui);color:#d7a45f;font-size:.78rem;letter-spacing:.14em}.surface-grid h3{margin:70px 0 14px}.surface-grid p{color:#aeb9be;font-size:1rem}.application-section{background:#f0f1ef}.application-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:8vw;align-items:start}.application-grid>div:first-child{max-width:520px}.application-list{display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid #bfc6c7}.application-list span{font-family:var(--ui);font-size:.84rem;font-weight:800;letter-spacing:.08em;padding:24px 8px;border-bottom:1px solid #bfc6c7}.application-list span:nth-child(odd){border-right:1px solid #bfc6c7}.configurator{background:radial-gradient(circle at 75% 20%,#9a2d2530,transparent 35%),#101820;color:#fff}.config-grid{display:grid;grid-template-columns:.78fr 1.22fr;gap:7vw}.config-intro{position:sticky;top:110px;align-self:start}.config-summary{margin-top:30px;padding:20px;border:1px solid #ffffff24;background:#ffffff08;color:#c8d1d5;font-family:var(--ui);font-size:.9rem;white-space:pre-line}.config-form{display:grid;grid-template-columns:1fr 1fr;gap:18px}.config-form label{display:grid;gap:8px}.config-form label>span{font-family:var(--ui);font-size:.76rem;font-weight:800;letter-spacing:.09em;color:#d7a45f}.config-form input,.config-form select,.config-form textarea{width:100%;border:1px solid #ffffff26;background:#0a1117;color:#fff;padding:14px 15px;border-radius:0;min-height:50px;font:inherit}.config-form textarea{resize:vertical}.config-form input:focus,.config-form select:focus,.config-form textarea:focus{outline:2px solid #d7a45f;outline-offset:2px}.config-form small{color:#9eabb1;line-height:1.45}.config-wide{grid-column:1/-1}.config-actions{display:flex!important;grid-template-columns:none!important;flex-direction:row;flex-wrap:wrap;align-items:center}.config-actions .button{border:1px solid #ffffff55;cursor:pointer}.config-actions .button-primary{border-color:#c92524}.surface-section .section-heading>p{color:#aeb9be}.section-heading.light h2{color:#fff}
@media(max-width:900px){.surface-grid{grid-template-columns:repeat(2,1fr)}.application-grid,.config-grid{grid-template-columns:1fr;gap:45px}.config-intro{position:static}.config-form{grid-template-columns:1fr}.config-wide{grid-column:auto}}
@media(max-width:520px){.surface-grid{grid-template-columns:1fr}.surface-grid article{min-height:210px}.surface-grid h3{margin-top:45px}.application-list{grid-template-columns:1fr}.application-list span:nth-child(odd){border-right:0}.config-actions{align-items:stretch}.config-actions .button{width:100%}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.surface-grid article:before{transition:none!important}.button,.product-card,.product-image img{transition:none!important}}