@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url(assets/fonts/inter-vietnamese.woff2) format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url(assets/fonts/inter-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url(assets/fonts/inter-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Montserrat';
  font-style: normal;
  font-weight: 500 700;
  font-display: swap;
  src: url(assets/fonts/montserrat-vietnamese.woff2) format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: 'Montserrat';
  font-style: normal;
  font-weight: 500 700;
  font-display: swap;
  src: url(assets/fonts/montserrat-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Montserrat';
  font-style: normal;
  font-weight: 500 700;
  font-display: swap;
  src: url(assets/fonts/montserrat-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* Shared type scale: 16px reading text, 15px controls, 13–14px supporting text. */
:root {
  --font-body: 'Inter', Arial, sans-serif;
  --font-heading: 'Montserrat', 'Inter', Arial, sans-serif;
  --text-body: 16px;
  --text-ui: 15px;
  --text-small: 14px;
  --text-caption: 13px;
  --text-label: 12px;
}
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body { font-family: var(--font-body); font-size: var(--text-body); line-height: 1.75; font-weight: 400; letter-spacing: 0; font-optical-sizing: auto; }
button, input, select, textarea { font-family: inherit; }
h1, h2, h3 { font-family: var(--font-heading); font-weight: 650; line-height: 1.35; letter-spacing: -.025em; text-wrap: balance; }
h1 { font-size: clamp(40px, 4.1vw, 60px); font-weight: 700; line-height: 1.24; letter-spacing: -.035em; }
h2, .about-copy h2, .contact h2 { font-size: clamp(30px, 3.1vw, 42px); }
h3 { font-size: 24px; }
p { line-height: 1.75; }
.eyebrow, .small-label { font-family: var(--font-body); font-size: var(--text-label); font-weight: 700; letter-spacing: .11em; line-height: 1.6; }
.button, .text-link, .back-button, .summary-reset, .back-top { font-size: var(--text-ui); font-weight: 600; line-height: 1.5; letter-spacing: 0; }
.button { min-height: 52px; white-space: normal; text-align: center; }
.topbar, .topbar-inner, .topbar-inner>a { font-size: var(--text-caption); line-height: 1.5; }
.topbar-inner { min-height: 38px; height: auto; padding: 8px 0; }
.header nav, .header nav>a:not(.button), .header .nav-cta { font-size: 14px; font-weight: 600; line-height: 1.5; }
.header nav { gap: 18px; }
.hero-description { font-size: var(--text-body); line-height: 1.8; max-width: 45ch; }
.hero-actions .button, .hero-actions .text-link { font-size: var(--text-ui); }
.hero-note { font-size: var(--text-caption); line-height: 1.6; max-width: 440px; }
.hero-note .tiny-dot { margin-top: 7px; align-self: flex-start; }
.hero-actions { flex-wrap: wrap; gap: 14px 24px; }
.hotspot { font-size: 14px; line-height: 1.5; font-weight: 600; max-width: 260px; }
.hotspot small { font-size: var(--text-label); line-height: 1.5; font-weight: 400; margin-top: 3px; }
.hotspot-plus { font-size: 20px; line-height: 1; }
.image-caption { font-size: var(--text-label); line-height: 1.5; letter-spacing: .04em; max-width: 100%; text-align: right; }
.scene-detail .eyebrow { font-size: var(--text-label); }
.scene-detail h3 { font-size: 24px; }
.scene-detail p { font-size: var(--text-ui); }
.scene-detail a { font-size: var(--text-ui); font-weight: 600; }
.scene-close { font-size: 28px; line-height: 1.25; }
.assurance strong { font-size: var(--text-body); line-height: 1.5; font-weight: 600; }
.assurance span { font-size: var(--text-small); line-height: 1.6; }
.section-heading>p, .config-intro>p { font-size: var(--text-body); line-height: 1.75; max-width: 385px; }
.solution-tabs button { min-width: 0; }
.solution-tabs span { font-size: var(--text-ui); line-height: 1.5; font-weight: 600; min-width: 0; }
.solution-tabs small { font-size: var(--text-label); line-height: 1.5; font-weight: 400; }
.visual-label { font-size: var(--text-label); line-height: 1.5; letter-spacing: .06em; }
.visual-bottom { font-size: var(--text-label); line-height: 1.5; }
.status-tag { font-size: 11px; line-height: 1.5; letter-spacing: .025em; white-space: normal; }
.solution-info h3 { font-size: 28px; line-height: 1.4; max-width: none; }
.solution-info>p { font-size: var(--text-body); line-height: 1.75; }
.check-list { font-size: var(--text-ui); line-height: 1.6; gap: 14px; }
.check-list .icon { margin-top: 4px; }
.detail-footer { flex-wrap: wrap; gap: 12px; }
.detail-footer>span { font-size: var(--text-caption); line-height: 1.6; max-width: none; }
.detail-footer .text-link { font-size: var(--text-ui); }
.stepper li { font-size: var(--text-small); line-height: 1.5; font-weight: 500; }
.stepper li span { width: 28px; height: 28px; font-size: var(--text-caption); line-height: 1; }
.config-step h3 { font-size: 25px; line-height: 1.4; }
.config-step>p { font-size: var(--text-ui); line-height: 1.7; }
.choice-symbol { font-size: var(--text-caption); line-height: 1.5; }
.choice strong { font-size: var(--text-ui); font-weight: 600; line-height: 1.5; }
.choice small { display: block; margin-top: 5px; font-size: var(--text-caption); line-height: 1.6; }
.choice-check { font-size: var(--text-ui); line-height: 1.5; }
.needs-grid label { font-size: var(--text-ui); line-height: 1.6; }
.needs-grid small { font-size: var(--text-label); line-height: 1.5; margin-top: 4px; }
.field-row label, label:has(>textarea), label:has(>input:not([type=checkbox],[type=radio])) { font-size: var(--text-small); font-weight: 600; line-height: 1.6; min-width: 0; }
.field-row select, input:not([type=checkbox],[type=radio]), textarea { font-size: var(--text-body); line-height: 1.5; font-weight: 400; }
.priority-field { font-size: var(--text-ui); line-height: 1.6; }
.priority-field legend { font-size: var(--text-small); font-weight: 600; }
.priority-field label { margin-bottom: 11px; }
.config-controls>span { font-size: var(--text-caption); line-height: 1.6; }
.config-controls .button { font-size: var(--text-ui); min-height: 50px; }
.summary-top .small-label { font-size: var(--text-label); }
.config-summary h3 { font-size: 28px; line-height: 1.4; }
.summary-sub, .summary-line ul, .summary-line li, .summary-line p { font-size: var(--text-small); line-height: 1.7; }
.summary-line>span { font-size: var(--text-caption); line-height: 1.6; }
.summary-line li { margin-bottom: 8px; }
.summary-note { font-size: var(--text-caption); line-height: 1.7; }
.summary-reset { font-size: var(--text-small); }
.config-result .eyebrow { font-size: var(--text-label); }
.config-result h3 { font-size: 25px; line-height: 1.4; }
.config-result p { font-size: var(--text-body); line-height: 1.75; }
.config-result .button { font-size: var(--text-ui); flex-shrink: 0; }
.photo-plaque span { font-size: var(--text-body); line-height: 1.6; }
.photo-plaque strong { font-family: var(--font-heading); font-size: 22px; line-height: 1.4; font-weight: 600; }
.about-copy p:not(.eyebrow) { font-size: var(--text-body); line-height: 1.8; }
.about-values { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); }
.about-values span { font-size: var(--text-caption); line-height: 1.5; }
.about-values strong { display: block; font-size: var(--text-small); font-weight: 600; line-height: 1.6; }
.process-grid article>span { font-family: var(--font-heading); font-size: 34px; font-weight: 500; line-height: 1.4; }
.process-grid h3 { font-size: 20px; line-height: 1.45; }
.process-grid p { font-size: var(--text-ui); line-height: 1.8; }
.faq-grid>div:first-child>p:not(.eyebrow) { font-size: var(--text-body); line-height: 1.75; }
.faq-list summary { font-size: 17px; line-height: 1.6; font-weight: 600; }
.faq-list summary>span { font-size: 24px; font-weight: 400; line-height: 1; }
.faq-list summary>span { width: 24px; height: 24px; flex: 0 0 24px; display: grid; place-items: center; align-self: center; margin-right: 6px; }
.faq-list details p { font-size: var(--text-body); line-height: 1.8; }
.contact-grid small { font-size: var(--text-label); letter-spacing: .08em; line-height: 1.5; }
.contact-grid strong { font-size: var(--text-body); font-weight: 500; line-height: 1.65; }
.contact-placeholder { font-size: var(--text-caption); line-height: 1.8; }
.contact-top .button { font-size: var(--text-ui); }
.footer-main p { font-size: var(--text-small); line-height: 1.8; }
.back-top { font-size: var(--text-small); }
.footer-bottom, .footer-bottom button { font-size: var(--text-caption); line-height: 1.6; }
.mobile-action a { font-size: var(--text-ui); font-weight: 600; line-height: 1.5; }
.dialog-header .eyebrow { font-size: var(--text-label); }
.dialog-close { font-size: 30px; line-height: 1.2; }
dialog h2 { font-size: 29px; line-height: 1.4; }
.dialog-intro { font-size: var(--text-body); line-height: 1.75; }
.request-selections { font-size: var(--text-small); line-height: 1.7; }
.request-selections strong, .request-selections a { font-size: var(--text-small); font-weight: 600; }
.consent { font-size: var(--text-small)!important; font-weight: 400!important; line-height: 1.7; }
.form-note { font-size: var(--text-caption); line-height: 1.7; }
dialog .button { font-size: var(--text-ui); min-height: 50px; }
#request-preview { font-family: var(--font-body); font-size: var(--text-small); line-height: 1.8; }
#privacy-dialog>p { font-size: var(--text-body); line-height: 1.8; }
.toast { font-size: var(--text-small); line-height: 1.6; }

/* Allow longer, readable labels to reflow instead of shrinking the font. */
@media(max-width:1240px) {
  .menu-toggle { display: flex; flex-direction: column; gap: 6px; padding: 13px 6px; width: 36px; align-items: center; }
  .menu-toggle span { height: 1.5px; width: 21px; display: block; background: #fff; transition: transform .15s; }
  .menu-toggle[aria-expanded=true] span:first-child { transform: translateY(3.75px) rotate(45deg); }
  .menu-toggle[aria-expanded=true] span:last-child { transform: translateY(-3.75px) rotate(-45deg); }
  .header nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--navy); padding: 15px 32px 25px; box-shadow: 0 12px 20px #082c4840; border-top: 1px solid #ffffff20; align-items: stretch; max-height: calc(100dvh - 96px); overflow-y: auto; }
  .header nav.is-open { display: flex; flex-direction: column; gap: 7px; }
  .header nav>a:not(.button) { padding: 12px 0; font-size: var(--text-ui); }
  .header .nav-cta { font-size: var(--text-ui); margin-top: 10px; padding: 14px; }
}
@media(max-width:1100px) {
  .solution-tabs { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .solution-tabs button:nth-child(2) { border-right: 0; }
  .solution-tabs button:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .assurance-grid>div { align-items: flex-start; }
  .config-layout { grid-template-columns: minmax(0,1fr) 300px; }
  .stepper { gap: 14px; }
  .config-controls>span { display: none; }
}
@media(max-width:900px) {
  .config-layout { grid-template-columns: minmax(0,1fr); }
  .solution-panel { grid-template-columns: minmax(0,1fr); }
  .solution-visual { height: 310px; }
  .home-illustration { max-width: 320px; }
  .tech-house { max-height: 225px; }
  .detail-footer { flex-direction: row; align-items: center; }
  .check-list { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .about-grid { gap: 35px; }
  .contact-grid { grid-template-columns: 1fr; gap: 8px; }
}
@media(max-width:780px) {
  h1, .hero h1 { font-size: clamp(36px,7.8vw,48px); line-height: 1.28; letter-spacing: -.035em; }
  h2, .about-copy h2, .contact h2 { font-size: clamp(30px,5.6vw,38px); line-height: 1.35; }
  .hero-description, .about-copy p:not(.eyebrow), .section-heading>p { font-size: var(--text-body); }
  .hero .eyebrow { font-size: var(--text-label); }
  .hero-actions .button, .hero-actions .text-link { font-size: var(--text-ui); }
  .hero-note { margin-top: 24px; }
  .hero-explore { margin-top: 25px; }
  .hero-photo { height: 405px; }
  .hotspot { font-size: 14px; max-width: 245px; }
  .hotspot small { font-size: var(--text-label); }
  .scene-detail h3 { font-size: 23px; }
  .scene-detail { bottom: 35px; padding: 24px; }
  .scene-detail .eyebrow { font-size: var(--text-label); }
  .topbar-inner>span, .topbar-inner>a { font-size: var(--text-label); }
  .topbar-tagline, .top-divider { display: none; }
  .topbar-inner { padding: 8px 0; }
  .header nav { padding: 15px 20px 25px; }
  .solution-tabs span { font-size: var(--text-ui); }
  .solution-tabs small { font-size: var(--text-label); }
  .solution-info h3 { font-size: 27px; }
  .detail-footer>span { max-width: none; }
  .config-step h3, .config-result h3 { font-size: 24px; }
  .config-summary h3 { font-size: 27px; }
  .summary-line ul { display: block; }
  .summary-line li { font-size: var(--text-small); }
  .about-values strong { font-size: var(--text-small); }
  .contact-top .button, .config-result .button { font-size: var(--text-ui); }
  .footer-main p { font-size: var(--text-small); }
  .footer-bottom { row-gap: 16px; }
  .footer-bottom button { margin-left: 0; }
  dialog { padding: 25px; }
  dialog h2 { font-size: 26px; }
  .dialog-intro, .form-note { font-size: var(--text-small); }
}
@media(max-width:600px) {
  .assurance-grid { grid-template-columns: 1fr; gap: 18px; padding: 26px 0; }
  .assurance-grid>div { flex-direction: row; align-items: center; gap: 15px; }
  .assurance-grid>div:not(:last-child) { border: 0; border-bottom: 1px solid var(--line); padding-bottom: 18px; }
  .assurance strong { font-size: var(--text-body); }
  .assurance span { font-size: var(--text-small); max-width: none; }
  .hero-actions { flex-direction: column; align-items: flex-start; gap: 10px; }
  .hero-actions .button { width: 100%; justify-content: space-between; }
  .hero-actions .text-link { padding: 10px 0; }
  .hero-note { max-width: 33ch; }
  .image-caption { font-size: 11px; bottom: 10px; }
  .solution-tabs button { padding: 18px 13px; gap: 9px; align-items: flex-start; }
  .solution-tabs button>.icon { width: 22px; height: 22px; margin-top: 2px; }
  .solution-tabs small { margin-top: 6px; }
  .solution-info { padding: 26px 22px; }
  .solution-info h3 { font-size: 26px; }
  .check-list { grid-template-columns: 1fr; }
  .detail-footer { align-items: flex-start; flex-direction: column; }
  .config-workspace { padding: 22px 18px; }
  .stepper { gap: 10px; }
  .stepper li { flex: 1; min-width: 0; flex-direction: column; gap: 8px; text-align: center; font-size: 13px; }
  .stepper li span { width: 30px; height: 30px; }
  .needs-grid, .field-row { grid-template-columns: 1fr; }
  .needs-grid label { padding: 15px; min-height: 58px; }
  .choice-grid { gap: 10px; }
  .choice { padding: 16px 13px; }
  .choice small { font-size: var(--text-caption); }
  .config-controls { flex-wrap: wrap; gap: 12px; }
  .config-controls .button { padding: 12px 17px; }
  .config-controls>span { display: none; }
  .photo-plaque { left: -5px; padding: 18px; gap: 12px; }
  .photo-plaque span { font-size: var(--text-small); }
  .photo-plaque strong { font-size: 20px; }
  .process-grid { gap: 30px 22px; }
  .process-grid h3 { font-size: 19px; }
  .faq-list summary { font-size: 16px; }
  .contact h2 { font-size: 30px; }
  .review-actions { flex-direction: column; }
  .footer-bottom>span:first-child { flex-basis: 100%; }
}

/* Homepage headline: 70% of the original responsive heading scale. */
#hero-title { font-size: clamp(28px, 2.87vw, 42px); }
@media (max-width: 780px) {
  #hero-title { font-size: clamp(25.2px, 5.46vw, 33.6px); }
}