:root {
  --navy: #0b315b;
  --navy-deep: #062443;
  --blue: #0078d4;
  --cyan: #00b7ff;
  --ice: #eef8fc;
  --paper: #f5f7f8;
  --white: #fff;
  --ink: #152333;
  --muted: #657282;
  --line: #dce3e8;
  --shadow: 0 18px 48px rgba(11, 49, 91, .14);
  --radius: 8px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--white); font: 400 16px/1.55 "Be Vietnam Pro", system-ui, sans-serif; }
body.locked { overflow: hidden; }
body.product-detail-open main > section:not(.product-detail-view),
body.product-detail-open footer { display: none; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button { cursor: pointer; }
img { display: block; max-width: 100%; }
.container { width: min(1240px, calc(100% - 40px)); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -70px; z-index: 500; padding: 10px 15px; color: #fff; background: var(--navy); }
.skip-link:focus { top: 16px; }

.notice-bar { color: #fff; background: var(--navy-deep); font-size: .78rem; }
.notice-inner { min-height: 34px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.notice-inner div { display: flex; gap: 20px; }
.notice-inner a:hover { color: var(--cyan); }

.site-header { position: sticky; top: 0; z-index: 80; background: rgba(255,255,255,.97); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
.nav { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--navy); }
.brand-symbol { width: 40px; height: 40px; display: grid; place-items: center; color: #fff; background: var(--navy); font-size: 1.2rem; font-weight: 700; }
.brand strong { display: block; font-size: 1rem; letter-spacing: -.02em; }
.brand small { display: block; color: var(--muted); font-size: .64rem; letter-spacing: .09em; text-transform: uppercase; }
.desktop-nav { display: flex; align-items: center; gap: 30px; font-size: .88rem; font-weight: 600; }
.desktop-nav a { padding: 24px 0 21px; border-bottom: 3px solid transparent; }
.desktop-nav a:hover { color: var(--blue); border-bottom-color: var(--blue); }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.nav-button {
  min-height: 40px;
  padding: 0 17px;
  display: inline-flex;
  align-items: center;
  color: #fff;
  background: var(--blue);
  border: 0;
  font-size: .82rem;
  font-weight: 700;
  cursor: pointer;
}
.icon-button { width: 40px; height: 40px; color: var(--navy); background: var(--ice); border: 0; font-size: 1.1rem; }

.hero { position: relative; min-height: 545px; overflow: hidden; color: #fff; background: var(--navy); }
.hero-media, .hero-media img, .hero-shade { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-media img { object-fit: cover; transition: opacity .25s ease; }
.hero-fallback { position: absolute; inset: 0; display: grid; place-items: center; background: linear-gradient(115deg, #0b315b 0%, #0d5a88 45%, #8eddf4 100%); }
.hero-fallback::before, .hero-fallback::after { content: ""; position: absolute; border: 1px solid rgba(255,255,255,.25); border-radius: 50%; }
.hero-fallback::before { width: 42vw; height: 42vw; right: -7vw; top: -12vw; }
.hero-fallback::after { width: 26vw; height: 26vw; right: 18vw; bottom: -18vw; }
.hero-fallback span { margin-left: 55%; color: rgba(255,255,255,.12); font-size: clamp(8rem, 21vw, 20rem); font-weight: 700; letter-spacing: -.12em; }
.hero-shade { background: linear-gradient(90deg, rgba(3,24,45,.82) 0%, rgba(3,24,45,.46) 43%, rgba(3,24,45,.04) 74%); }
.hero-content { position: relative; z-index: 2; min-height: 545px; display: flex; align-items: center; padding-block: 58px 86px; }
.hero-copy-panel { width: min(510px, 70%); }
.overline, .section-label { display: block; margin-bottom: 9px; color: var(--blue); font-size: .74rem; font-weight: 700; letter-spacing: .11em; text-transform: uppercase; }
.hero .overline { color: #8fdfff; }
h1, h2, h3, p { overflow-wrap: break-word; }
h1 { margin: 0 0 13px; max-width: 500px; font-size: clamp(1.8rem, 3.3vw, 2.55rem); line-height: 1.18; letter-spacing: -.035em; }
.hero-copy-panel p { max-width: 470px; margin: 0; color: #e5f0f6; font-size: .96rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.button { min-height: 44px; padding: 0 19px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 1px solid transparent; font-size: .82rem; font-weight: 700; transition: .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--blue); }
.button-light { color: var(--navy); background: #fff; }
.button-dark { color: #fff; background: var(--navy); }
.button-white { color: var(--navy); background: #fff; }
.button-outline { color: #fff; border-color: rgba(255,255,255,.68); background: transparent; }
.hero-controls { position: absolute; left: 50%; bottom: 23px; z-index: 3; display: flex; align-items: center; gap: 10px; transform: translateX(-50%); }
.hero-controls > button { width: 36px; height: 36px; color: #fff; background: rgba(4,31,57,.45); border: 1px solid rgba(255,255,255,.6); }
.hero-dots { display: flex; gap: 7px; }
.hero-dot { width: 28px; height: 3px; padding: 0; background: rgba(255,255,255,.48); border: 0; }
.hero-dot.active { background: #fff; }

.category-shortcuts { padding: 18px 0; background: #fff; border-bottom: 1px solid var(--line); }
.shortcut-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.shortcut { width: 100%; min-height: 78px; padding: 15px 18px; display: flex; align-items: center; justify-content: space-between; gap: 18px; color: var(--ink); background: var(--paper); border: 1px solid transparent; text-align: left; }
.shortcut:hover { border-color: #a8cfe3; background: var(--ice); }
.shortcut-text { display: flex; align-items: center; gap: 13px; }
.shortcut-icon { width: 42px; height: 42px; display: grid; place-items: center; color: #fff; background: var(--blue); font-weight: 700; }
.shortcut strong { display: block; font-size: .92rem; }
.shortcut small { color: var(--muted); font-size: .74rem; }
.shortcut-arrow { color: var(--blue); font-size: 1.1rem; }

.product-section, .collection-section, .support-section { padding: 72px 0; }
.product-section { background: var(--paper); }
.compact-head { margin-bottom: 24px; display: flex; justify-content: space-between; align-items: end; gap: 28px; }
h2 { margin: 0; font-size: clamp(1.45rem, 2.4vw, 2rem); line-height: 1.25; letter-spacing: -.03em; }
.search-box { position: relative; width: min(310px, 100%); }
.search-box span { position: absolute; left: 13px; top: 50%; color: var(--muted); transform: translateY(-50%); }
.search-box input { width: 100%; height: 43px; padding: 0 13px 0 38px; background: #fff; border: 1px solid var(--line); outline: 0; }
.search-box input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(0,120,212,.1); }
.filter-row { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 3px; margin-bottom: 20px; scrollbar-width: thin; }
.filter-button { flex: 0 0 auto; min-height: 38px; padding: 0 16px; color: var(--ink); background: #fff; border: 1px solid var(--line); font-size: .8rem; font-weight: 600; }
.filter-button.active, .filter-button:hover { color: #fff; background: var(--navy); border-color: var(--navy); }
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; }
.product-card { min-width: 0; overflow: hidden; background: #fff; border: 1px solid var(--line); transition: .2s ease; }
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.product-image { position: relative; aspect-ratio: 1.28 / 1; overflow: hidden; background: #edf1f3; }
.product-image img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.product-card:hover .product-image img { transform: scale(1.035); }
.visual-fallback { position: absolute; inset: 0; display: grid; place-items: center; overflow: hidden; color: var(--navy); background: linear-gradient(140deg, #edf8fc, #d9ebf2); }
.visual-fallback::after { content: ""; position: absolute; width: 75%; height: 75%; right: -30%; bottom: -42%; border: 1px solid rgba(0,120,212,.25); border-radius: 50%; }
.visual-fallback span { position: relative; z-index: 1; padding: 12px; font-size: .75rem; font-weight: 600; text-align: center; }
.product-badge { position: absolute; left: 11px; top: 11px; z-index: 2; padding: 5px 8px; color: #fff; background: var(--blue); font-size: .66rem; font-weight: 700; }
.product-copy { padding: 16px; }
.product-meta { color: var(--muted); font-size: .68rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; }
.product-card h3 { margin: 5px 0 6px; font-size: 1.02rem; line-height: 1.28; }
.product-description { min-height: 42px; margin: 0; color: var(--muted); font-size: .78rem; }
.spec-row { display: flex; gap: 5px; flex-wrap: wrap; margin: 12px 0 14px; }
.spec-row span { padding: 4px 7px; color: #445463; background: var(--paper); font-size: .65rem; }
.product-bottom { padding-top: 12px; display: flex; align-items: center; justify-content: space-between; gap: 8px; border-top: 1px solid var(--line); }
.product-price { color: var(--navy); font-size: .85rem; font-weight: 700; }
.detail-button { padding: 5px 0; color: var(--blue); background: transparent; border: 0; font-size: .75rem; font-weight: 700; }
.empty-state { display: none; padding: 36px; color: var(--muted); background: #fff; text-align: center; }

.collection-section { background: #fff; }
.collection-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.collection-card { position: relative; min-height: 390px; overflow: hidden; color: #fff; background: var(--navy); }
.collection-card img, .collection-card .visual-fallback { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.collection-card .visual-fallback { background: linear-gradient(140deg, #167abd, #82d2e9); }
.collection-card:nth-child(2) .visual-fallback { background: linear-gradient(140deg, #4e6075, #b8dce8); }
.collection-shade { position: absolute; inset: 0; background: linear-gradient(0deg, rgba(4,26,48,.84), rgba(4,26,48,.03) 70%); }
.collection-copy { position: absolute; left: 25px; right: 25px; bottom: 24px; z-index: 2; }
.collection-copy small { font-size: .7rem; letter-spacing: .11em; text-transform: uppercase; }
.collection-copy h3 { margin: 7px 0 6px; font-size: 1.35rem; }
.collection-copy p { max-width: 430px; margin: 0 0 15px; color: #e6f0f5; font-size: .8rem; }
.collection-link { display: inline-flex; padding-bottom: 3px; border-bottom: 1px solid #fff; font-size: .78rem; font-weight: 700; }

.service-strip { padding: 32px 0; background: var(--ice); border-block: 1px solid #d6eaf2; }
.service-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.service-item { padding: 8px 22px; border-right: 1px solid #bedbe7; }
.service-item:last-child { border: 0; }
.service-number { color: var(--blue); font-size: .7rem; font-weight: 700; }
.service-item strong { display: block; margin: 7px 0 4px; font-size: .84rem; }
.service-item p { margin: 0; color: var(--muted); font-size: .72rem; }

.support-section { background: var(--paper); }
.support-grid { display: grid; grid-template-columns: .88fr 1.12fr; gap: 18px; }
.support-card { padding: 30px; background: #fff; border: 1px solid var(--line); }
.support-card p { margin: 10px 0 22px; color: var(--muted); font-size: .86rem; }
.faq-list { display: grid; align-content: start; gap: 8px; }
details { padding: 16px 18px; background: #fff; border: 1px solid var(--line); }
summary { font-size: .83rem; font-weight: 700; cursor: pointer; }
details p { margin: 10px 0 0; color: var(--muted); font-size: .78rem; }

.contact-section { padding: 0 0 72px; background: var(--paper); }
.contact-card { padding: 34px; display: flex; align-items: center; justify-content: space-between; gap: 35px; color: #fff; background: linear-gradient(105deg, var(--navy), #0879b5); }
.section-label-light { color: #8fdfff; }
.contact-card p { margin: 8px 0 0; color: #dcecf5; font-size: .84rem; }
.contact-actions { display: flex; flex-wrap: wrap; justify-content: end; gap: 8px; }

footer { padding: 38px 0 90px; color: #c8d5df; background: var(--navy-deep); }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr .7fr 1fr; gap: 35px; }
.footer-grid strong { color: #fff; font-size: .84rem; }
.footer-grid p, .footer-links a { color: #aebfcb; font-size: .72rem; }
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links strong { margin-bottom: 5px; }
.footer-links a:hover { color: var(--cyan); }

.floating-actions { position: fixed; right: 17px; bottom: 17px; z-index: 90; display: flex; flex-direction: column; gap: 8px; }
.floating-button { width: 52px; height: 52px; display: grid; place-items: center; color: #fff; border: 0; border-radius: 50%; box-shadow: 0 10px 28px rgba(11,49,91,.25); font-size: .72rem; font-weight: 700; }
.floating-button.zalo { background: #0877e8; }
.floating-button.ai { position: relative; background: var(--navy); font-size: 1.2rem; }
.floating-button.ai::after { content: ""; position: absolute; right: 2px; top: 2px; width: 9px; height: 9px; background: #42df7b; border: 2px solid #fff; border-radius: 50%; }

.chat-panel { position: fixed; right: 17px; bottom: 82px; z-index: 110; width: min(390px, calc(100vw - 24px)); height: min(590px, calc(100vh - 105px)); display: none; grid-template-rows: auto 1fr auto; overflow: hidden; background: #fff; border: 1px solid var(--line); box-shadow: 0 26px 80px rgba(6,36,67,.26); }
.chat-panel.open { display: grid; }
.chat-head { padding: 15px 16px; display: flex; align-items: center; justify-content: space-between; color: #fff; background: var(--navy); }
.chat-identity { display: flex; align-items: center; gap: 10px; }
.chat-avatar { width: 38px; height: 38px; display: grid; place-items: center; color: var(--navy); background: var(--cyan); font-weight: 700; }
.chat-identity strong, .chat-identity small { display: block; }
.chat-identity strong { font-size: .86rem; }
.chat-identity small { color: #bdd3e2; font-size: .68rem; }
.chat-close { width: 36px; height: 36px; color: inherit; background: transparent; border: 0; font-size: 1.2rem; }
.chat-body { padding: 15px; overflow-y: auto; background: #f3f7f9; }
.message { width: fit-content; max-width: 88%; margin-bottom: 9px; padding: 10px 12px; border-radius: 10px; white-space: pre-wrap; font-size: .78rem; }
.message.bot { background: #fff; border: 1px solid var(--line); border-bottom-left-radius: 2px; }
.message.user { margin-left: auto; color: #fff; background: var(--blue); border-bottom-right-radius: 2px; }
.message.typing { color: var(--muted); font-style: italic; }
.quick-prompts { display: flex; flex-wrap: wrap; gap: 6px; margin: 7px 0 13px; }
.quick-prompt { padding: 6px 9px; color: var(--blue); background: #fff; border: 1px solid #a9cee2; font-size: .69rem; font-weight: 600; }
.chat-human { margin-top: 12px; padding-top: 10px; display: flex; gap: 6px; border-top: 1px solid var(--line); }
.chat-human a { flex: 1; padding: 7px; background: #fff; border: 1px solid var(--line); text-align: center; font-size: .68rem; font-weight: 700; }
.chat-form { padding: 10px; display: grid; grid-template-columns: 1fr auto; gap: 7px; border-top: 1px solid var(--line); }
.chat-form input { min-width: 0; height: 42px; padding: 0 12px; border: 1px solid var(--line); outline: 0; }
.chat-form input:focus { border-color: var(--blue); }
.chat-form button { width: 42px; height: 42px; color: #fff; background: var(--blue); border: 0; }
.chat-form button:disabled { opacity: .5; cursor: wait; }

.product-detail-view { min-height: calc(100vh - 104px); padding: 25px 0 80px; background: #f4f6f8; }
.product-breadcrumb { min-height: 46px; margin-bottom: 18px; display: flex; align-items: center; justify-content: space-between; gap: 20px; color: var(--muted); font-size: .72rem; }
.product-back { padding: 8px 0; color: var(--navy); background: transparent; border: 0; font-size: .78rem; font-weight: 700; }
.product-back:hover { color: var(--blue); }
.pdp-top { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(360px, .88fr); gap: 24px; align-items: start; }
.pdp-gallery { min-width: 0; padding: 18px; display: grid; grid-template-columns: 76px minmax(0, 1fr); gap: 12px; background: #fff; border: 1px solid var(--line); }
.pdp-thumbnails { display: flex; flex-direction: column; gap: 9px; max-height: 590px; overflow-y: auto; scrollbar-width: thin; }
.pdp-thumbnail { position: relative; width: 100%; aspect-ratio: 1 / 1; flex: 0 0 auto; overflow: hidden; background: #edf1f3; border: 2px solid transparent; }
.pdp-thumbnail:hover, .pdp-thumbnail.active { border-color: var(--blue); }
.pdp-thumbnail img { width: 100%; height: 100%; object-fit: cover; }
.pdp-main-image { position: relative; width: 100%; min-height: 590px; padding: 0; overflow: hidden; background: #edf1f3; border: 0; }
.pdp-main-image img { width: 100%; height: 100%; object-fit: contain; transition: transform .28s ease; }
.pdp-main-image:hover img { transform: scale(1.025); }
.pdp-main-image::after { content: "Nhấp để phóng lớn"; position: absolute; right: 12px; bottom: 12px; padding: 6px 9px; color: #fff; background: rgba(6,36,67,.78); font-size: .65rem; }
.pdp-buybox { padding: 30px; background: #fff; border: 1px solid var(--line); }
.pdp-buybox h1 { margin: 7px 0 10px; color: var(--ink); font-size: clamp(1.55rem, 2.5vw, 2.15rem); line-height: 1.22; letter-spacing: -.035em; }
.pdp-summary { margin: 0; color: var(--muted); font-size: .84rem; }
.pdp-price { margin: 20px 0 16px; padding: 15px 17px; color: #d6362f; background: #fff4f1; font-size: 1.2rem; font-weight: 700; }
.pdp-benefits { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 14px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.pdp-benefits span { color: #3f5365; font-size: .7rem; }
.pdp-selector { margin-top: 21px; }
.pdp-selector-head { margin-bottom: 10px; display: flex; align-items: center; justify-content: space-between; gap: 12px; font-size: .76rem; }
.pdp-selector-head strong { color: var(--ink); }
.pdp-selector-head span { color: var(--blue); }
.pdp-choice-list, .pdp-config-list { display: flex; flex-wrap: wrap; gap: 8px; }
.pdp-color-choice, .pdp-config-choice { min-height: 42px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; color: var(--ink); background: #fff; border: 1px solid #cfd8df; font-size: .72rem; font-weight: 600; }
.pdp-color-choice { padding: 6px 12px 6px 7px; }
.pdp-config-choice { padding: 7px 12px; }
.pdp-color-choice:hover, .pdp-config-choice:hover, .pdp-color-choice.active, .pdp-config-choice.active { color: var(--blue); border-color: var(--blue); box-shadow: inset 0 0 0 1px var(--blue); }
.color-swatch { width: 27px; height: 27px; flex: 0 0 auto; border: 1px solid rgba(0,0,0,.15); border-radius: 50%; }
.pdp-spec-pills { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 22px; }
.pdp-spec-pills span { padding: 6px 9px; color: #3f5365; background: var(--paper); font-size: .68rem; }
.pdp-selection-note { min-height: 20px; margin: 13px 0 0; color: var(--muted); font-size: .68rem; }
.pdp-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 20px; }
.pdp-actions .button { min-height: 48px; }
.pdp-actions .js-detail-chat { grid-column: 1 / -1; }
.pdp-phone { color: var(--navy); border-color: var(--navy); }
.pdp-information { margin-top: 24px; overflow: hidden; background: #fff; border: 1px solid var(--line); }
.pdp-anchor-nav { position: sticky; top: 70px; z-index: 20; min-height: 54px; padding: 0 28px; display: flex; align-items: center; gap: 28px; background: rgba(255,255,255,.97); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
.pdp-anchor-nav a { padding: 17px 0 14px; border-bottom: 3px solid transparent; font-size: .76rem; font-weight: 700; }
.pdp-anchor-nav a:hover { color: var(--blue); border-bottom-color: var(--blue); }
.pdp-specification, .pdp-story { padding: 46px clamp(20px, 4vw, 54px); scroll-margin-top: 132px; }
.pdp-specification { border-top: 1px solid var(--line); background: #f8fafb; }
.pdp-spec-table { width: 100%; margin-top: 25px; border: 1px solid var(--line); }
.pdp-spec-row { display: grid; grid-template-columns: minmax(150px, .7fr) 1.3fr; border-bottom: 1px solid var(--line); }
.pdp-spec-row:last-child { border: 0; }
.pdp-spec-row span { padding: 13px 16px; font-size: .76rem; }
.pdp-spec-row span:first-child { color: var(--muted); background: #f2f5f7; font-weight: 600; }
.pdp-story-list { width: 100%; margin-top: 28px; }
.pdp-story-item { width: 100%; padding: 0 0 52px; background: transparent; }
.pdp-story-item:last-child { padding-bottom: 0; }
.pdp-story-image { position: relative; width: 100%; aspect-ratio: 1 / 1; display: grid; place-items: center; overflow: hidden; background: #f4f6f7; }
.pdp-story-image img { width: 100%; height: 100%; object-fit: contain; margin-inline: auto; }
.pdp-story-copy { width: 100%; padding: 0 0 18px; }
.pdp-story-copy h3 { margin: 0 0 7px; font-size: 1rem; }
.pdp-story-copy p { max-width: 980px; margin: 0; color: var(--muted); font-size: .8rem; }
.image-lightbox { position: fixed; inset: 0; z-index: 130; display: none; place-items: center; padding: 28px; background: rgba(2,15,28,.9); }
.image-lightbox.open { display: grid; }
.image-lightbox img { max-width: min(1200px, 96vw); max-height: 90vh; object-fit: contain; }
.lightbox-close { position: absolute; right: 18px; top: 16px; width: 42px; height: 42px; color: #fff; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.45); font-size: 1.4rem; }

@media (max-width: 980px) {
  .nav { flex-wrap: wrap; gap: 0 20px; }
  .desktop-nav { order: 3; width: 100%; display: flex; justify-content: center; gap: 26px; overflow-x: auto; }
  .desktop-nav a { flex: 0 0 auto; padding: 9px 0 8px; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .service-grid { grid-template-columns: repeat(2, 1fr); gap: 20px 0; }
  .service-item:nth-child(2) { border-right: 0; }
  .support-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .pdp-top { grid-template-columns: 1fr; }
  .pdp-gallery { grid-template-columns: 70px minmax(0, 1fr); }
  .pdp-main-image { min-height: 540px; }
  .pdp-anchor-nav { top: 110px; }
  .pdp-description, .pdp-specification, .pdp-story { scroll-margin-top: 170px; }
}

@media (max-width: 680px) {
  .container { width: min(100% - 24px, 1240px); }
  .notice-inner { justify-content: center; }
  .notice-inner > span, .notice-inner div a:first-child { display: none; }
  .nav { min-height: 62px; }
  .desktop-nav { justify-content: flex-start; gap: 20px; }
  .brand-symbol { width: 36px; height: 36px; }
  .nav-button { display: none; }
  .hero, .hero-content { min-height: 500px; }
  .hero-copy-panel { width: 88%; }
  .hero-shade { background: linear-gradient(90deg, rgba(3,24,45,.84), rgba(3,24,45,.28)); }
  h1 { font-size: 1.85rem; }
  .hero-copy-panel p { font-size: .86rem; }
  .shortcut-grid, .collection-grid { grid-template-columns: 1fr; }
  .shortcut { min-height: 70px; }
  .product-section, .collection-section, .support-section { padding: 54px 0; }
  .compact-head { align-items: start; flex-direction: column; gap: 16px; }
  .search-box { width: 100%; }
  .product-grid { grid-template-columns: 1fr 1fr; gap: 9px; }
  .product-copy { padding: 12px; }
  .product-description { display: none; }
  .spec-row span:nth-child(n+3) { display: none; }
  .product-bottom { align-items: start; flex-direction: column; }
  .collection-card { min-height: 330px; }
  .service-grid { grid-template-columns: 1fr; gap: 0; }
  .service-item { padding: 14px 4px; border-right: 0; border-bottom: 1px solid #bedbe7; }
  .contact-card { align-items: start; flex-direction: column; }
  .contact-actions { justify-content: start; }
  .footer-grid { grid-template-columns: 1fr; gap: 22px; }
  .floating-actions { right: 11px; bottom: 11px; }
  .floating-button.zalo { display: none; }
  .chat-panel { right: 6px; bottom: 72px; width: calc(100vw - 12px); height: min(610px, calc(100vh - 84px)); }
  .product-detail-view { padding-top: 13px; }
  .product-breadcrumb { margin-bottom: 10px; }
  .product-breadcrumb > div { display: none; }
  .pdp-gallery { padding: 10px; grid-template-columns: 1fr; }
  .pdp-thumbnails { order: 2; flex-direction: row; max-height: none; overflow-x: auto; }
  .pdp-thumbnail { width: 66px; }
  .pdp-main-image { min-height: 330px; }
  .pdp-main-image::after { display: none; }
  .pdp-buybox { padding: 22px 17px; }
  .pdp-benefits { grid-template-columns: 1fr; }
  .pdp-actions { grid-template-columns: 1fr; }
  .pdp-actions .js-detail-chat { grid-column: auto; }
  .pdp-anchor-nav { top: 104px; padding: 0 16px; gap: 20px; overflow-x: auto; }
  .pdp-anchor-nav a { flex: 0 0 auto; }
  .pdp-specification, .pdp-story { padding: 35px 16px; scroll-margin-top: 165px; }
  .pdp-spec-row { grid-template-columns: 42% 58%; }
  .pdp-spec-row span { padding: 11px 10px; font-size: .7rem; }
  .pdp-story-item { padding-bottom: 34px; }
  .pdp-story-copy { padding-bottom: 13px; }
}

@media (max-width: 390px) {
  .product-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}
/* =========================
   MỤC BÀI VIẾT KHÁM PHÁ
========================= */

body.article-detail-open main > section:not(.article-detail-view),
body.article-detail-open footer {
  display: none;
}

.article-grid {
  margin-bottom: 40px;
}

.article-card {
  min-height: 390px;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  overflow: hidden;
  background: #f5f7f8;
  border: 1px solid var(--line);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.article-card:focus {
  outline: 3px solid rgba(0, 120, 212, 0.25);
  outline-offset: 3px;
}

.article-card-image {
  position: relative;
  min-height: 390px;
  overflow: hidden;
  background: #e8eef2;
}

.article-card-image img,
.article-card-image .visual-fallback {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-card-copy {
  padding: clamp(28px, 4vw, 52px);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
}

.article-card-copy small {
  margin-bottom: 12px;
  color: var(--blue);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.article-card-copy h3 {
  margin: 0 0 14px;
  color: var(--ink);
  font-size: clamp(1.5rem, 2.6vw, 2.15rem);
  line-height: 1.25;
  letter-spacing: -0.035em;
}

.article-card-copy p {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.7;
}

.article-card-link {
  padding-bottom: 4px;
  color: var(--navy);
  border-bottom: 1px solid var(--navy);
  font-size: 0.8rem;
  font-weight: 700;
}

.collection-subhead {
  margin: 0 0 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.collection-subhead::after {
  content: "";
  height: 1px;
  flex: 1;
  background: var(--line);
}


/* =========================
   TRANG ĐỌC BÀI VIẾT
========================= */

.article-detail-view {
  min-height: 70vh;
  background: #fff;
}

.article-shell {
  padding-bottom: 78px;
}

.article-breadcrumb {
  min-height: 62px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  font-size: 0.74rem;
}

.article-back {
  padding: 0;
  color: var(--navy);
  background: transparent;
  border: 0;
  font-size: 0.78rem;
  font-weight: 700;
}

.article-back:hover {
  color: var(--blue);
}

.container-narrow {
  width: min(780px, calc(100% - 40px));
  margin-inline: auto;
}

.container-wide {
  width: min(1120px, calc(100% - 40px));
  margin-inline: auto;
}

.article-header {
  padding-top: 68px;
  text-align: center;
}

.article-kicker {
  display: block;
  margin-bottom: 15px;
  color: var(--blue);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.article-header h1 {
  max-width: 780px;
  margin: 0 auto;
  color: var(--ink);
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1.16;
}

.article-lead {
  margin: 18px auto 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.75;
}

.article-meta {
  margin-top: 18px;
  color: #87929e;
  font-size: 0.72rem;
}

.article-cover {
  margin-top: 42px;
  margin-bottom: 0;
}

.article-cover > div {
  position: relative;
  aspect-ratio: 16 / 8.5;
  overflow: hidden;
  background: var(--paper);
}

.article-cover img,
.article-cover .visual-fallback {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-cover figcaption {
  padding-top: 10px;
  color: #84909d;
  font-size: 0.68rem;
  text-align: center;
}

.article-body {
  padding-top: 50px;
}


/* Ô trả lời ngắn và lưu ý */

.article-callout {
  margin: 0 0 32px;
  padding: 25px 28px;
  border-left: 4px solid var(--blue);
  background: var(--ice);
}

.article-callout.note {
  border-color: var(--navy);
  background: #f3f6f8;
}

.article-callout h2 {
  margin: 0 0 8px;
  color: var(--ink);
  font-size: 1.05rem;
}

.article-callout p {
  margin: 0;
  color: #46586a;
  font-size: 0.88rem;
  line-height: 1.75;
}


/* Danh mục nội dung */

.article-toc {
  margin: 0 0 48px;
  padding: 24px 28px;
  border: 1px solid var(--line);
}

.article-toc strong {
  display: block;
  color: var(--ink);
  font-size: 1rem;
}

.article-toc ol {
  margin: 12px 0 0;
  padding-left: 21px;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.9;
}


/* Các phần nội dung chính */

.article-content-section {
  margin: 0 0 46px;
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 18px;
}

.article-content-section > h2 {
  grid-column: 1 / -1;
}

.article-section-number {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--navy);
  font-size: 0.72rem;
  font-weight: 700;
}

.article-content-section h2 {
  margin: 2px 0 13px;
  color: var(--ink);
  font-size: 1.35rem;
}

.article-content-section p {
  margin: 0 0 13px;
  color: #536273;
  font-size: 0.88rem;
  line-height: 1.85;
}


/* Checklist */

.article-checklist {
  grid-column: 1 / -1;
  border: 1px solid var(--line);
}

.article-checklist > div {
  padding: 14px 17px;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 20px;
  border-bottom: 1px solid var(--line);
  font-size: 0.78rem;
}

.article-checklist > div:last-child {
  border-bottom: 0;
}

.article-checklist strong {
  color: var(--navy);
}

.article-checklist span {
  color: var(--muted);
}


/* Nguồn tham khảo */

.article-sources {
  margin: 40px 0 0;
  padding: 24px 28px;
  background: #f7f9fa;
  border: 1px solid var(--line);
}

.article-sources h2 {
  margin: 0 0 14px;
  font-size: 1.05rem;
}

.article-sources ul {
  margin: 0;
  padding-left: 20px;
}

.article-sources li {
  margin-bottom: 9px;
  color: var(--muted);
  font-size: 0.8rem;
}

.article-sources li:last-child {
  margin-bottom: 0;
}

.article-sources a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-sources a:hover {
  color: var(--navy);
}


/* Khối tư vấn cuối bài */

.article-cta {
  margin-top: 54px;
  padding: 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  color: #fff;
  background: var(--navy);
}

.article-cta h2 {
  margin: 0 0 7px;
  color: #fff;
  font-size: 1.25rem;
}

.article-cta p {
  margin: 0;
  color: #d8e8f2;
  font-size: 0.8rem;
}

.article-cta .button {
  flex: 0 0 auto;
}


/* =========================
   ĐIỆN THOẠI
========================= */

@media (max-width: 680px) {
  .article-card {
    grid-template-columns: 1fr;
  }

  .article-card-image {
    min-height: 250px;
  }

  .article-card-copy {
    padding: 27px 22px 30px;
  }

  .article-header {
    padding-top: 48px;
  }

  .article-header h1 {
    font-size: 1.9rem;
  }

  .article-cover {
    width: 100%;
  }

  .article-cover > div {
    aspect-ratio: 4 / 3;
  }

  .article-cover figcaption {
    padding-inline: 20px;
  }

  .article-content-section {
    grid-template-columns: 42px 1fr;
    gap: 13px;
  }

  .article-content-section h2 {
    font-size: 1.15rem;
  }

  .article-checklist > div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .article-cta {
    align-items: flex-start;
    flex-direction: column;
  }

  .article-breadcrumb > span {
    display: none;
  }
}
/* Bảng so sánh trong bài viết */

.article-comparison {
  margin: 0 0 46px;
}

.article-comparison h2 {
  margin: 0 0 18px;
  color: var(--ink);
  font-size: 1.35rem;
}

.article-table-scroll {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
}

.article-comparison table {
  width: 100%;
  min-width: 650px;
  border-collapse: collapse;
  background: #fff;
}

.article-comparison th,
.article-comparison td {
  padding: 14px 16px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  font-size: 0.78rem;
  line-height: 1.6;
}

.article-comparison th:last-child,
.article-comparison td:last-child {
  border-right: 0;
}

.article-comparison tr:last-child td {
  border-bottom: 0;
}

.article-comparison th {
  color: #fff;
  background: var(--navy);
  font-weight: 700;
}

.article-comparison td:first-child {
  color: var(--navy);
  background: #f5f7f8;
  font-weight: 700;
}

@media (max-width: 680px) {
  .article-comparison h2 {
    font-size: 1.15rem;
  }

  .article-table-scroll {
    padding-bottom: 4px;
  }
}
/* ==================================================
   ZALO NỔI — RÊ CHUỘT ĐỂ BUNG CÁC NHÁNH
================================================== */

.zalo-floating-menu {
  position: relative;
  width: 56px;
  height: 56px;
}

/* Bỏ ký hiệu mặc định của thẻ details */

.zalo-floating-menu > summary {
  list-style: none;
}

.zalo-floating-menu > summary::-webkit-details-marker {
  display: none;
}

/* Icon Zalo chính: chỉ là hình tròn */

.zalo-main-icon {
  position: relative;
  z-index: 20;

  width: 56px;
  height: 56px;
  padding: 0;

  display: grid;
  place-items: center;

  color: #ffffff;
  background: #0877e8;
  border: 3px solid #ffffff;
  border-radius: 50%;
  box-shadow: 0 8px 25px rgba(8, 119, 232, 0.4);

  font-family: Arial, sans-serif;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;

  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease;
}

.zalo-main-icon:hover,
.zalo-floating-menu[open] .zalo-main-icon {
  transform: scale(1.1);
  box-shadow: 0 12px 32px rgba(8, 119, 232, 0.5);
}

/* Vùng chứa các nhánh */

.zalo-branches {
  position: absolute;
  right: 25px;
  bottom: 25px;

  width: 310px;
  height: 230px;

  pointer-events: none;
}

/* Mỗi nhánh Zalo */

.zalo-branch {
  position: absolute;
  right: 0;
  bottom: 0;

  display: flex;
  align-items: center;
  gap: 10px;

  color: #10243e;
  text-decoration: none;

  opacity: 0;
  visibility: hidden;
  pointer-events: none;

  transform: translate(35px, 35px) scale(0.4);
  transform-origin: right bottom;

  transition:
    opacity 0.25s ease,
    visibility 0.25s ease,
    transform 0.45s cubic-bezier(0.18, 0.89, 0.32, 1.28);
}

/* Icon của các Zalo nhánh cũng chỉ là hình tròn */

.zalo-circle {
  width: 48px;
  height: 48px;
  flex: 0 0 48px;

  display: grid;
  place-items: center;

  color: #ffffff;
  background: #0877e8;
  border: 3px solid #ffffff;
  border-radius: 50%;
  box-shadow: 0 7px 20px rgba(8, 119, 232, 0.32);

  font-family: Arial, sans-serif;
  font-size: 11px;
  font-weight: 700;

  transition: transform 0.2s ease;
}

/* Tên tài khoản nằm cạnh icon */

.zalo-label {
  min-width: 155px;
  padding: 7px 11px;

  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 7px 22px rgba(17, 49, 84, 0.16);

  transform: translateX(5px);
}

.zalo-label strong,
.zalo-label small {
  display: block;
  white-space: nowrap;
}

.zalo-label strong {
  color: #10243e;
  font-size: 12px;
}

.zalo-label small {
  margin-top: 2px;
  color: #738095;
  font-size: 10px;
}

/* Vị trí các nhánh sau khi bung ra */

.zalo-floating-menu:hover .zalo-branch-1,
.zalo-floating-menu:focus-within .zalo-branch-1,
.zalo-floating-menu[open] .zalo-branch-1 {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translate(-40px, -5px) scale(1);
}

.zalo-floating-menu:hover .zalo-branch-2,
.zalo-floating-menu:focus-within .zalo-branch-2,
.zalo-floating-menu[open] .zalo-branch-2 {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translate(-60px, -80px) scale(1);
}

.zalo-floating-menu:hover .zalo-branch-3,
.zalo-floating-menu:focus-within .zalo-branch-3,
.zalo-floating-menu[open] .zalo-branch-3 {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translate(-25px, -155px) scale(1);
}

/* Hiệu ứng chạy ra lần lượt */

.zalo-branch-1 {
  transition-delay: 0s;
}

.zalo-branch-2 {
  transition-delay: 0.07s;
}

.zalo-branch-3 {
  transition-delay: 0.14s;
}

.zalo-branch:hover .zalo-circle {
  transform: scale(1.12);
}

.zalo-branch:hover .zalo-label strong {
  color: #0877e8;
}

/* Điện thoại: chạm icon để mở */

@media (max-width: 680px) {
  .zalo-branches {
    right: 20px;
    bottom: 20px;
    width: calc(100vw - 80px);
    max-width: 290px;
  }

  .zalo-floating-menu:not([open]) .zalo-branch {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
  }

  .zalo-floating-menu[open] .zalo-branch-1 {
    transform: translate(-25px, -5px) scale(1);
  }

  .zalo-floating-menu[open] .zalo-branch-2 {
    transform: translate(-25px, -70px) scale(1);
  }

  .zalo-floating-menu[open] .zalo-branch-3 {
    transform: translate(-25px, -135px) scale(1);
  }

  .zalo-label {
    min-width: 145px;
  }
}
/* Video trong bài viết hướng dẫn */

.article-video-section {
  margin: 38px 0;
}

.article-video-section h2 {
  margin: 0 0 16px;
  color: var(--ink);
}

.article-video-frame {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: #eef3f7;
  aspect-ratio: 16 / 9;
}

.article-video-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
/* Video TikTok trong bài hướng dẫn */

.article-tiktok-frame {
  width: min(100%, 420px);
  margin: 20px auto 0;
  overflow: hidden;
  background: #101010;
  aspect-ratio: 9 / 16;
  border-radius: 18px;
  box-shadow: 0 16px 40px rgba(12, 37, 65, 0.18);
}

.article-tiktok-frame iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}

.article-video-link {
  margin: 14px 0 0;
  text-align: center;
}

.article-video-link a {
  color: #0877e8;
  font-weight: 700;
  text-decoration: none;
}

.article-video-link a:hover {
  text-decoration: underline;
}