/* ═══════════════════════════════════════════════════════════
   VIỆT HUY SCIENTIFIC — SHARED STYLESHEET
   Brand: Blue #1A5FAC · Red #CC2020 · Navy #0D2E5E
   Font: Barlow Condensed (display) + Source Sans 3 (body)
   ═══════════════════════════════════════════════════════════ */

/* ─── DESIGN TOKENS ──────────────────────────────────────── */
:root {
  --navy:        #0D2E5E;
  --navy-mid:    #133578;
  --navy-light:  #1A5FAC;
  --blue:        #1A5FAC;
  --blue-light:  #E8F0FB;
  --blue-dark:   #124A8A;
  --red:         #CC2020;
  --red-light:   #FDEAEA;
  --red-dark:    #AA1818;
  --white:       #FFFFFF;
  --bg:          #F4F7FC;
  --bg-alt:      #EEF3FA;
  --border:      #C8D8EC;
  --border-light:#DDE9F5;
  --text:        #0D1E35;
  --text-muted:  #4D6580;
  --text-light:  #7A99BB;
  --success:     #1A8A5A;
  --success-bg:  #E8F8F2;
  --r-xs:        4px;
  --r-sm:        6px;
  --r-md:        10px;
  --r-lg:        16px;
  --r-xl:        24px;
  --shadow-xs:   0 1px 3px rgba(13,30,61,0.06);
  --shadow-sm:   0 2px 8px rgba(13,30,61,0.08);
  --shadow-md:   0 4px 20px rgba(13,30,61,0.10);
  --shadow-lg:   0 12px 48px rgba(13,30,61,0.13);
  --transition:  all .2s ease;
}

/* ─── RESET ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Source Sans 3', sans-serif;
  font-size: 15px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
input, select, textarea, button { font-family: inherit; }

/* ─── LAYOUT UTILITIES ────────────────────────────────────── */
.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.section { padding: 72px 0; }
.section-sm { padding: 48px 0; }
.section-lg { padding: 96px 0; }

/* ─── TYPOGRAPHY UTILITIES ────────────────────────────────── */
.section-label {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 11px; font-weight: 700; letter-spacing: 2px;
  text-transform: uppercase; color: var(--blue-dark);
  margin-bottom: 12px;
}
.section-label::before {
  content: ''; display: block; width: 20px; height: 2px;
  background: var(--red); border-radius: 2px;
}
.section-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: clamp(28px, 3.2vw, 42px);
  font-weight: 700; line-height: 1.15;
  color: var(--navy-mid); letter-spacing: .3px;
  margin-bottom: 14px;
}
.section-desc {
  font-size: 15.5px; color: var(--text-muted);
  max-width: 560px; line-height: 1.72;
}
.page-hero-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: clamp(32px, 4vw, 50px);
  font-weight: 700; color: white; letter-spacing: .5px;
  line-height: 1.1;
}

/* ─── BUTTONS ─────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: var(--r-sm);
  font-size: 14px; font-weight: 600;
  cursor: pointer; transition: var(--transition);
  border: none; letter-spacing: .2px; white-space: nowrap;
}
.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn-lg { padding: 15px 30px; font-size: 15px; }
.btn-primary { background: var(--blue); color: white; box-shadow: 0 4px 14px rgba(26,95,172,.3); }
.btn-primary:hover { background: var(--blue-dark); transform: translateY(-1px); }
.btn-red { background: var(--red); color: white; box-shadow: 0 4px 14px rgba(204,32,32,.28); }
.btn-red:hover { background: var(--red-dark); transform: translateY(-1px); }
.btn-outline { background: transparent; color: var(--navy-mid); border: 1.5px solid var(--border); }
.btn-outline:hover { border-color: var(--blue); color: var(--blue-dark); background: var(--blue-light); }
.btn-outline-white { background: transparent; color: white; border: 1.5px solid rgba(255,255,255,.35); }
.btn-outline-white:hover { background: rgba(255,255,255,.12); border-color: rgba(255,255,255,.6); }
.btn-ghost { background: transparent; color: var(--blue-dark); padding: 8px 0; }
.btn-ghost:hover { color: var(--blue); }
.btn-icon { width: 36px; height: 36px; padding: 0; justify-content: center; border-radius: var(--r-sm); }

/* ─── BADGES ──────────────────────────────────────────────── */
.badge {
  display: inline-flex; align-items: center;
  font-size: 10px; font-weight: 700; padding: 2px 7px;
  border-radius: var(--r-xs); font-family: 'IBM Plex Mono', monospace;
  letter-spacing: .4px;
}
.badge-ce    { background: var(--success-bg); color: var(--success); }
.badge-fda   { background: #FEF3DC; color: #9A6C00; }
.badge-ruo   { background: #F0F4FF; color: #3949AB; }
.badge-new   { background: var(--blue); color: white; }
.badge-hot   { background: var(--red); color: white; }
.badge-dept  { padding: 3px 10px; border-radius: 20px; font-size: 11px; font-weight: 600; }
.badge-sales { background: #FEF3DC; color: #9A6C00; }
.badge-tech  { background: var(--blue-light); color: var(--blue-dark); }
.badge-mkt   { background: #F3E8FF; color: #6B21A8; }
.badge-hr    { background: var(--success-bg); color: var(--success); }

/* ─── FORM ELEMENTS ───────────────────────────────────────── */
.form-group { margin-bottom: 18px; }
.form-label { display: block; font-size: 13px; font-weight: 600; color: var(--navy-mid); margin-bottom: 6px; }
.form-label .req { color: var(--red); margin-left: 3px; }
.form-control {
  width: 100%; padding: 11px 14px;
  border: 1.5px solid var(--border); border-radius: var(--r-sm);
  font-family: 'Source Sans 3', sans-serif; font-size: 14px;
  color: var(--text); background: white; outline: none;
  transition: border-color .18s, box-shadow .18s;
}
.form-control:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(26,95,172,.1); }
.form-control::placeholder { color: var(--text-light); }
textarea.form-control { resize: vertical; min-height: 110px; }
select.form-control { cursor: pointer; appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%234D6580' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 12px center; padding-right: 36px;
}
.form-file { border: 1.5px dashed var(--border); border-radius: var(--r-sm); padding: 16px; text-align: center; cursor: pointer; transition: var(--transition); }
.form-file:hover { border-color: var(--blue); background: var(--blue-light); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.checkbox-group { display: flex; flex-direction: column; gap: 10px; }
.checkbox-item { display: flex; align-items: center; gap: 10px; cursor: pointer; }
.checkbox-item input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--blue); cursor: pointer; flex-shrink: 0; }
.checkbox-item span { font-size: 13.5px; color: var(--text-muted); }
.checkbox-item:hover span { color: var(--text); }

/* ─── TOPBAR ──────────────────────────────────────────────── */
.topbar {
  background: var(--navy);
  color: rgba(255,255,255,.72);
  font-size: 12.5px; padding: 7px 0;
  border-bottom: 2px solid var(--red);
}
.topbar .container { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.topbar a { color: rgba(255,255,255,.8); transition: color .15s; }
.topbar a:hover { color: var(--white); }
.topbar-left, .topbar-right { display: flex; align-items: center; gap: 20px; }
.topbar-item { display: flex; align-items: center; gap: 6px; }
.topbar-sep { color: rgba(255,255,255,.2); }
.lang-switcher { display: flex; gap: 3px; }
.lang-btn { padding: 2px 8px; border-radius: var(--r-xs); font-size: 11px; font-weight: 700; cursor: pointer; transition: var(--transition); }
.lang-btn.active { background: var(--blue); color: white; }
.lang-btn:not(.active) { color: rgba(255,255,255,.55); }
.lang-btn:not(.active):hover { color: white; }

/* ─── HEADER ──────────────────────────────────────────────── */
.header { background: white; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; box-shadow: var(--shadow-sm); }
.header-inner { display: flex; align-items: center; gap: 20px; padding: 0 24px; max-width: 1180px; margin: 0 auto; height: 68px; }
.logo { display: flex; align-items: center; flex-shrink: 0; }
.logo-img { height: 50px; width: auto; object-fit: contain; }
.header-search { flex: 1; max-width: 380px; margin: 0 auto; position: relative; }
.header-search input { width: 100%; padding: 9px 16px 9px 40px; border: 1.5px solid var(--border); border-radius: 24px; font-size: 13.5px; color: var(--text); background: var(--bg); outline: none; transition: var(--transition); }
.header-search input:focus { border-color: var(--blue); background: white; }
.header-search input::placeholder { color: var(--text-light); }
.header-search .search-icon { position: absolute; left: 13px; top: 50%; transform: translateY(-50%); color: var(--text-light); }
.header-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.header-hotline { display: flex; flex-direction: column; align-items: flex-end; line-height: 1.2; }
.header-hotline span { font-size: 10px; color: var(--text-muted); text-transform: uppercase; letter-spacing: .8px; }
.header-hotline strong { font-size: 15px; color: var(--navy-mid); font-weight: 700; }
.header-icon-btn { width: 36px; height: 36px; border-radius: var(--r-sm); border: 1.5px solid var(--border); display: flex; align-items: center; justify-content: center; color: var(--text-muted); cursor: pointer; transition: var(--transition); }
.header-icon-btn:hover { border-color: var(--blue); color: var(--blue-dark); background: var(--blue-light); }

/* ─── NAV ─────────────────────────────────────────────────── */
.nav { background: var(--navy-mid); }
.nav .container { display: flex; align-items: center; }
.nav-list { display: flex; }
.nav-item > a { display: flex; align-items: center; gap: 4px; padding: 0 16px; height: 44px; font-size: 13.5px; font-weight: 500; color: rgba(255,255,255,.82); transition: var(--transition); position: relative; }
.nav-item > a::after { content: ''; position: absolute; bottom: 0; left: 16px; right: 16px; height: 2px; background: var(--red); border-radius: 2px; transform: scaleX(0); transition: transform .2s; }
.nav-item > a:hover { color: white; }
.nav-item > a:hover::after, .nav-item.active > a::after { transform: scaleX(1); }
.nav-item.active > a { color: white; }
.nav-cta { margin-left: auto; padding-left: 12px; }
.nav-cta .btn { padding: 8px 18px; font-size: 13px; }

/* ─── PAGE HERO (inner pages) ─────────────────────────────── */
.page-hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 60%, #1A4A8A 100%);
  padding: 48px 0 44px; position: relative; overflow: hidden;
}
.page-hero::before {
  content: ''; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 48px 48px;
}
.page-hero::after {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse 50% 100% at 80% 50%, rgba(26,95,172,.2), transparent 60%);
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero-sub { font-size: 13px; color: rgba(255,255,255,.6); margin-top: 10px; max-width: 560px; }

/* ─── BREADCRUMB ──────────────────────────────────────────── */
.breadcrumb { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; margin-bottom: 16px; }
.breadcrumb a { font-size: 12.5px; color: rgba(255,255,255,.55); transition: color .15s; }
.breadcrumb a:hover { color: rgba(255,255,255,.9); }
.breadcrumb .sep { color: rgba(255,255,255,.3); font-size: 12px; }
.breadcrumb .current { font-size: 12.5px; color: rgba(255,255,255,.85); font-weight: 500; }
/* Light breadcrumb (on white bg) */
.breadcrumb-light a { color: var(--text-muted); }
.breadcrumb-light .sep { color: var(--border); }
.breadcrumb-light .current { color: var(--text); }

/* ─── SIDEBAR LAYOUT ──────────────────────────────────────── */
.sidebar-layout { display: grid; grid-template-columns: 260px 1fr; gap: 28px; align-items: start; }
.sidebar { background: white; border: 1px solid var(--border); border-radius: var(--r-lg); overflow: hidden; position: sticky; top: 90px; }
.sidebar-section { padding: 20px; border-bottom: 1px solid var(--border-light); }
.sidebar-section:last-child { border-bottom: none; }
.sidebar-title { font-size: 11px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; color: var(--text-muted); margin-bottom: 14px; }
.sidebar-nav-item { display: flex; align-items: center; justify-content: space-between; padding: 9px 12px; border-radius: var(--r-sm); cursor: pointer; transition: var(--transition); margin-bottom: 2px; }
.sidebar-nav-item:hover { background: var(--blue-light); color: var(--blue-dark); }
.sidebar-nav-item.active { background: var(--blue-light); color: var(--blue-dark); font-weight: 600; }
.sidebar-nav-item span { font-size: 13.5px; }
.sidebar-count { font-size: 11px; background: var(--bg); padding: 1px 7px; border-radius: 10px; color: var(--text-light); font-weight: 600; }

/* ─── FILTER SIDEBAR ──────────────────────────────────────── */
.filter-sidebar { background: white; border: 1px solid var(--border); border-radius: var(--r-lg); overflow: hidden; position: sticky; top: 90px; }
.filter-block { padding: 18px 20px; border-bottom: 1px solid var(--border-light); }
.filter-block:last-child { border-bottom: none; }
.filter-title { font-size: 12px; font-weight: 700; letter-spacing: 1.2px; text-transform: uppercase; color: var(--navy-mid); margin-bottom: 14px; display: flex; align-items: center; justify-content: space-between; cursor: pointer; }
.filter-search { position: relative; }
.filter-search input { padding-left: 36px; }
.filter-search svg { position: absolute; left: 11px; top: 50%; transform: translateY(-50%); color: var(--text-light); }

/* ─── PRODUCT CARD ────────────────────────────────────────── */
.product-card { background: white; border-radius: var(--r-lg); border: 1px solid var(--border); overflow: hidden; transition: var(--transition); cursor: pointer; }
.product-card:hover { border-color: var(--blue); box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.product-card-img { height: 180px; background: var(--blue-light); display: flex; align-items: center; justify-content: center; font-size: 48px; position: relative; overflow: hidden; }
.product-card-badges { position: absolute; top: 10px; left: 10px; display: flex; gap: 4px; }
.product-card-body { padding: 16px 18px 18px; }
.product-brand { font-size: 10.5px; color: var(--text-light); letter-spacing: .8px; text-transform: uppercase; font-weight: 600; margin-bottom: 5px; }
.product-name { font-size: 14.5px; font-weight: 600; color: var(--navy-mid); margin-bottom: 7px; line-height: 1.35; }
.product-desc { font-size: 13px; color: var(--text-muted); line-height: 1.55; margin-bottom: 14px; }
.product-footer { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.product-tech { display: flex; gap: 4px; flex-wrap: wrap; }
.tech-chip { font-size: 10.5px; padding: 2px 7px; border-radius: 4px; background: var(--bg); border: 1px solid var(--border); color: var(--text-muted); font-weight: 500; }
.product-action { width: 32px; height: 32px; border-radius: var(--r-sm); background: var(--blue-light); color: var(--blue-dark); display: flex; align-items: center; justify-content: center; transition: var(--transition); flex-shrink: 0; }
.product-card:hover .product-action { background: var(--blue); color: white; }

/* ─── ARTICLE CARD ────────────────────────────────────────── */
.article-card { background: white; border-radius: var(--r-lg); border: 1px solid var(--border); overflow: hidden; cursor: pointer; transition: var(--transition); }
.article-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.article-img { background: var(--blue-light); display: flex; align-items: center; justify-content: center; font-size: 36px; position: relative; overflow: hidden; }
.article-cat { position: absolute; bottom: 10px; left: 10px; font-size: 10px; font-weight: 700; letter-spacing: 1.2px; text-transform: uppercase; padding: 3px 9px; border-radius: var(--r-xs); }
.cat-pcr { background: var(--navy); color: #7AB3F0; }
.cat-ngs { background: #004D40; color: #80CBC4; }
.cat-gen { background: #4A0E00; color: #FFAB91; }
.cat-iso { background: #1A237E; color: #9FA8DA; }
.cat-news { background: var(--navy-mid); color: rgba(255,255,255,.85); }
.cat-event { background: #CC2020; color: white; }
.article-body { padding: 14px 16px 16px; }
.article-meta { display: flex; align-items: center; gap: 6px; font-size: 11.5px; color: var(--text-light); margin-bottom: 8px; }
.article-meta .sep { width: 3px; height: 3px; border-radius: 50%; background: var(--border); }
.article-title { font-size: 14px; font-weight: 600; color: var(--navy-mid); line-height: 1.4; margin-bottom: 7px; }
.article-excerpt { font-size: 13px; color: var(--text-muted); line-height: 1.55; }
.article-read { display: inline-flex; align-items: center; gap: 5px; font-size: 12.5px; font-weight: 600; color: var(--blue); margin-top: 10px; transition: gap .15s; }
.article-card:hover .article-read { gap: 8px; }

/* ─── PAGINATION ──────────────────────────────────────────── */
.pagination { display: flex; align-items: center; justify-content: center; gap: 6px; padding: 32px 0 0; }
.page-btn { width: 38px; height: 38px; border-radius: var(--r-sm); display: flex; align-items: center; justify-content: center; font-size: 13.5px; font-weight: 500; cursor: pointer; border: 1.5px solid var(--border); background: white; color: var(--text-muted); transition: var(--transition); }
.page-btn:hover { border-color: var(--blue); color: var(--blue-dark); }
.page-btn.active { background: var(--blue); border-color: var(--blue); color: white; }
.page-btn.disabled { opacity: .4; cursor: not-allowed; }

/* ─── SUPPORT WIDGET ──────────────────────────────────────── */
.support-widget { background: var(--navy); border-radius: var(--r-lg); padding: 18px; margin-top: 16px; }
.support-widget h4 { font-size: 12px; font-weight: 700; letter-spacing: 1.2px; text-transform: uppercase; color: rgba(255,255,255,.5); margin-bottom: 14px; }
.support-contact { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.support-icon { width: 32px; height: 32px; border-radius: 8px; background: rgba(255,255,255,.1); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.support-info strong { display: block; font-size: 12px; color: rgba(255,255,255,.5); }
.support-info span { font-size: 13.5px; font-weight: 600; color: #7AB3F0; }

/* ─── CLIENTS TRACK ───────────────────────────────────────── */
.clients-track-wrap { position: relative; overflow: hidden; }
.clients-track-wrap::before, .clients-track-wrap::after { content: ''; position: absolute; top: 0; bottom: 0; z-index: 2; width: 80px; }
.clients-track-wrap::before { left: 0; background: linear-gradient(to right, var(--bg), transparent); }
.clients-track-wrap::after { right: 0; background: linear-gradient(to left, var(--bg), transparent); }
.clients-track { display: flex; gap: 16px; animation: scrollX 32s linear infinite; width: max-content; }
@keyframes scrollX { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.client-chip { background: white; border: 1.5px solid var(--border); border-radius: var(--r-md); padding: 12px 20px; display: flex; align-items: center; gap: 10px; white-space: nowrap; flex-shrink: 0; }
.client-chip-icon { width: 32px; height: 32px; border-radius: 6px; background: var(--blue-light); display: flex; align-items: center; justify-content: center; font-size: 15px; }
.client-chip-name { font-size: 13px; font-weight: 600; color: var(--navy-mid); }

/* ─── FOOTER ──────────────────────────────────────────────── */
.footer { background: #071528; padding: 56px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.3fr; gap: 40px; padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,.07); }
.footer-logo { margin-bottom: 14px; }
.footer-logo img { height: 44px; width: auto; object-fit: contain; }
.footer-about { font-size: 13px; color: rgba(255,255,255,.45); line-height: 1.7; margin-bottom: 20px; max-width: 280px; }
.footer-cert { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.cert-badge { padding: 3px 9px; border-radius: var(--r-xs); font-size: 10px; font-weight: 700; font-family: 'IBM Plex Mono', monospace; border: 1px solid rgba(255,255,255,.12); color: rgba(255,255,255,.4); }
.footer-social { display: flex; gap: 8px; }
.social-btn { width: 36px; height: 36px; border-radius: var(--r-sm); background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,.45); cursor: pointer; transition: var(--transition); }
.social-btn:hover { background: var(--blue); border-color: var(--blue); color: white; }
.footer-col h4 { font-size: 11px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; color: rgba(255,255,255,.38); margin-bottom: 16px; }
.footer-links li { margin-bottom: 8px; }
.footer-links a { font-size: 13px; color: rgba(255,255,255,.55); transition: color .15s; }
.footer-links a:hover { color: #7AB3F0; }
.footer-offices h4 { font-size: 11px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; color: rgba(255,255,255,.38); margin-bottom: 16px; }
.office-item { margin-bottom: 14px; padding-bottom: 14px; border-bottom: 1px solid rgba(255,255,255,.06); }
.office-item:last-child { border-bottom: none; margin-bottom: 0; }
.office-city { font-size: 11.5px; font-weight: 700; color: #7AB3F0; text-transform: uppercase; letter-spacing: .8px; margin-bottom: 3px; }
.office-addr { font-size: 12.5px; color: rgba(255,255,255,.45); line-height: 1.55; }
.footer-newsletter { margin-top: 20px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.07); }
.footer-newsletter h4 { font-size: 11px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; color: rgba(255,255,255,.38); margin-bottom: 10px; }
.footer-newsletter-form { display: flex; gap: 8px; }
.footer-newsletter-form input { flex: 1; padding: 9px 12px; border-radius: var(--r-sm); border: 1px solid rgba(255,255,255,.12); background: rgba(255,255,255,.06); color: white; font-size: 13px; outline: none; }
.footer-newsletter-form input::placeholder { color: rgba(255,255,255,.3); }
.footer-newsletter-form button { padding: 9px 14px; background: var(--blue); color: white; border: none; border-radius: var(--r-sm); font-size: 13px; font-weight: 600; cursor: pointer; white-space: nowrap; }
.footer-bottom { padding: 18px 0; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.footer-copyright { font-size: 12px; color: rgba(255,255,255,.28); }
.footer-legal { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-legal a { font-size: 12px; color: rgba(255,255,255,.28); transition: color .15s; }
.footer-legal a:hover { color: rgba(255,255,255,.55); }
.footer-disclaimer { font-size: 11px; color: rgba(255,255,255,.2); margin-top: 6px; }

/* ─── MOBILE STICKY CTA ───────────────────────────────────── */
.mobile-sticky { display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 200; background: white; border-top: 1px solid var(--border); padding: 10px 16px; box-shadow: 0 -4px 20px rgba(0,0,0,.08); }
.mobile-sticky-inner { display: flex; gap: 10px; }
.mobile-sticky .btn { flex: 1; justify-content: center; padding: 11px; font-size: 13px; }

/* ─── SCROLL TO TOP ───────────────────────────────────────── */
.scroll-top { position: fixed; bottom: 80px; right: 20px; z-index: 150; width: 40px; height: 40px; border-radius: 50%; background: var(--blue); color: white; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 12px rgba(26,95,172,.35); cursor: pointer; opacity: 0; transition: opacity .3s, transform .2s; transform: translateY(8px); }
.scroll-top.visible { opacity: 1; transform: translateY(0); }
.scroll-top:hover { background: var(--blue-dark); }

/* ─── TABS ────────────────────────────────────────────────── */
.tabs-bar { display: flex; gap: 0; border-bottom: 2px solid var(--border); margin-bottom: 28px; overflow-x: auto; }
.tab-btn { padding: 12px 22px; font-size: 14px; font-weight: 600; color: var(--text-muted); cursor: pointer; border: none; background: none; border-bottom: 2px solid transparent; margin-bottom: -2px; white-space: nowrap; transition: var(--transition); }
.tab-btn:hover { color: var(--blue-dark); }
.tab-btn.active { color: var(--blue-dark); border-bottom-color: var(--blue); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ─── ACCORDION ───────────────────────────────────────────── */
.accordion-item { border: 1px solid var(--border); border-radius: var(--r-md); margin-bottom: 10px; overflow: hidden; }
.accordion-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 18px; cursor: pointer; background: white; transition: background .15s; }
.accordion-header:hover { background: var(--bg); }
.accordion-header.open { background: var(--blue-light); }
.accordion-question { font-size: 14.5px; font-weight: 600; color: var(--navy-mid); }
.accordion-header.open .accordion-question { color: var(--blue-dark); }
.accordion-icon { flex-shrink: 0; transition: transform .2s; color: var(--text-muted); }
.accordion-header.open .accordion-icon { transform: rotate(180deg); color: var(--blue-dark); }
.accordion-body { display: none; padding: 16px 18px; background: white; font-size: 14px; color: var(--text-muted); line-height: 1.7; border-top: 1px solid var(--border-light); }
.accordion-body.open { display: block; }

/* ─── SPEC TABLE ──────────────────────────────────────────── */
.spec-table { width: 100%; border-collapse: collapse; }
.spec-table tr:nth-child(even) td { background: var(--bg); }
.spec-table td { padding: 11px 14px; font-size: 13.5px; border-bottom: 1px solid var(--border-light); vertical-align: top; }
.spec-table td:first-child { font-weight: 600; color: var(--navy-mid); width: 40%; }
.spec-table td:last-child { color: var(--text-muted); }

/* ─── STEP INDICATOR ──────────────────────────────────────── */
.steps { display: flex; flex-direction: column; gap: 16px; }
.step { display: flex; gap: 16px; align-items: flex-start; }
.step-num { width: 32px; height: 32px; border-radius: 50%; background: var(--blue); color: white; display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 700; flex-shrink: 0; }
.step-content strong { display: block; font-size: 14px; color: var(--navy-mid); margin-bottom: 3px; }
.step-content p { font-size: 13px; color: var(--text-muted); }

/* ─── TAG CLOUD ───────────────────────────────────────────── */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 7px; }
.tag { padding: 4px 11px; border-radius: 20px; font-size: 12px; font-weight: 500; background: var(--bg); border: 1px solid var(--border); color: var(--text-muted); cursor: pointer; transition: var(--transition); }
.tag:hover { background: var(--blue-light); border-color: var(--blue); color: var(--blue-dark); }

/* ─── RESPONSIVE ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .sidebar-layout { grid-template-columns: 220px 1fr; gap: 20px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
}
@media (max-width: 768px) {
  .topbar .container { display: none; }
  .header-inner { height: 58px; }
  .header-search, .header-hotline { display: none; }
  .nav { display: none; }
  .sidebar-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .mobile-sticky { display: block; }
  .form-row { grid-template-columns: 1fr; }
}