/*
Theme Name: Tuolan Trade
Theme URI: https://tuolango.com/
Author: TUOLAN TRADE
Description: A lightweight, responsive B2B and cross-border commerce theme for TUOLAN TRADE.
Version: 1.7.1
Requires at least: 6.8
Requires PHP: 7.4
Text Domain: tuolan-trade
*/

:root {
  --tl-navy: #0b3f7a;
  --tl-navy-deep: #052e62;
  --tl-teal: #0aa2ad;
  --tl-teal-deep: #087e91;
  --tl-mist: #eff8fa;
  --tl-ink: #14243a;
  --tl-muted: #607087;
  --tl-line: #dbe7ec;
  --tl-white: #ffffff;
  --tl-shadow: 0 18px 55px rgba(5, 46, 98, 0.11);
  --tl-radius: 22px;
  --tl-width: 1180px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--tl-ink);
  background: var(--tl-white);
  font-family: Arial, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.68;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--tl-navy); text-decoration: none; }
a:hover, a:focus { color: var(--tl-teal-deep); }
button, input, select, textarea { font: inherit; }
:focus-visible { outline: 3px solid rgba(10, 162, 173, .38); outline-offset: 3px; }

.tl-container { width: min(calc(100% - 40px), var(--tl-width)); margin-inline: auto; }
.tl-site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid rgba(219, 231, 236, .9);
  backdrop-filter: blur(16px);
}
.admin-bar .tl-site-header { top: 32px; }
.tl-header-inner { min-height: 78px; display: flex; align-items: center; gap: 28px; }
.tl-brand { display: inline-flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.tl-brand img { width: 47px; height: 47px; }
.tl-brand-copy { line-height: 1.05; }
.tl-brand-name { display: block; color: var(--tl-navy-deep); font-size: 22px; font-weight: 800; letter-spacing: .045em; }
.tl-brand-tag { display: block; margin-top: 5px; color: var(--tl-muted); font-size: 10px; font-weight: 700; letter-spacing: .14em; }
.tl-main-nav { margin-left: auto; }
.tl-main-nav ul { display: flex; align-items: center; gap: 25px; margin: 0; padding: 0; list-style: none; }
.tl-main-nav a { color: var(--tl-ink); font-size: 14px; font-weight: 700; }
.tl-main-nav a:hover, .tl-main-nav .current-menu-item > a { color: var(--tl-teal-deep); }
.tl-header-cta { flex: 0 0 auto; }
.tl-menu-toggle { display: none; margin-left: auto; border: 0; background: transparent; color: var(--tl-navy-deep); font-weight: 700; cursor: pointer; }

.tl-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--tl-teal), var(--tl-teal-deep));
  color: var(--tl-white);
  font-weight: 800;
  box-shadow: 0 10px 24px rgba(10, 162, 173, .2);
  transition: transform .2s ease, box-shadow .2s ease;
}
.tl-btn:hover, .tl-btn:focus { color: var(--tl-white); transform: translateY(-2px); box-shadow: 0 14px 30px rgba(10, 162, 173, .28); }
.tl-btn--navy { background: linear-gradient(135deg, var(--tl-navy), var(--tl-navy-deep)); box-shadow: 0 10px 24px rgba(5, 46, 98, .2); }
.tl-btn--outline { border-color: rgba(11, 63, 122, .25); background: transparent; color: var(--tl-navy); box-shadow: none; }
.tl-btn--outline:hover, .tl-btn--outline:focus { background: var(--tl-mist); color: var(--tl-navy-deep); box-shadow: none; }

.tl-hero {
  position: relative;
  overflow: hidden;
  padding: 112px 0 98px;
  color: var(--tl-white);
  background:
    radial-gradient(circle at 82% 18%, rgba(24, 182, 189, .33), transparent 28%),
    radial-gradient(circle at 78% 88%, rgba(10, 162, 173, .2), transparent 32%),
    linear-gradient(135deg, var(--tl-navy-deep), var(--tl-navy));
}
.tl-hero::after { content: ""; position: absolute; inset: auto -9% -62% auto; width: 540px; height: 540px; border: 1px solid rgba(255,255,255,.13); border-radius: 50%; }
.tl-hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(290px, .75fr); gap: 78px; align-items: center; }
.tl-eyebrow { margin: 0 0 18px; color: var(--tl-teal); font-size: 13px; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
.tl-hero .tl-eyebrow { color: #72e0e5; }
.tl-hero h1 { max-width: 780px; margin: 0; color: var(--tl-white); font-size: clamp(43px, 6vw, 74px); line-height: 1.04; letter-spacing: -.035em; }
.tl-hero-lead { max-width: 670px; margin: 26px 0 0; color: rgba(255,255,255,.82); font-size: clamp(18px, 2vw, 21px); }
.tl-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.tl-hero .tl-btn--outline { border-color: rgba(255,255,255,.35); color: var(--tl-white); }
.tl-hero .tl-btn--outline:hover { background: rgba(255,255,255,.1); color: var(--tl-white); }
.tl-hero-mark { display: grid; place-items: center; min-height: 360px; border: 1px solid rgba(255,255,255,.15); border-radius: 48% 52% 42% 58% / 55% 44% 56% 45%; background: rgba(255,255,255,.08); }
.tl-hero-mark img { width: min(70%, 290px); filter: drop-shadow(0 24px 42px rgba(0,0,0,.2)); }

.tl-trust { border-bottom: 1px solid var(--tl-line); background: var(--tl-white); }
.tl-trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.tl-trust-item { padding: 22px 24px; border-right: 1px solid var(--tl-line); font-size: 13px; font-weight: 800; text-align: center; letter-spacing: .035em; }
.tl-trust-item:last-child { border-right: 0; }

.tl-section { padding: 92px 0; }
.tl-section--soft { background: linear-gradient(180deg, #f7fbfc, var(--tl-mist)); }
.tl-section--navy { color: var(--tl-white); background: linear-gradient(135deg, var(--tl-navy-deep), var(--tl-navy)); }
.tl-section-head { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 38px; }
.tl-section h2 { margin: 0; color: var(--tl-navy-deep); font-size: clamp(31px, 4vw, 48px); line-height: 1.12; letter-spacing: -.025em; }
.tl-section--navy h2 { color: var(--tl-white); }
.tl-section-lead { max-width: 680px; margin: 16px 0 0; color: var(--tl-muted); font-size: 18px; }
.tl-section--navy .tl-section-lead { color: rgba(255,255,255,.76); }

.tl-card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.tl-card { padding: 34px; border: 1px solid var(--tl-line); border-radius: var(--tl-radius); background: var(--tl-white); box-shadow: 0 8px 30px rgba(5,46,98,.05); }
.tl-card--accent { border-top: 4px solid var(--tl-teal); }
.tl-card-kicker { margin: 0 0 12px; color: var(--tl-teal-deep); font-size: 12px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.tl-card h3 { margin: 0 0 13px; color: var(--tl-navy-deep); font-size: 23px; line-height: 1.25; }
.tl-card p { margin: 0; color: var(--tl-muted); }
.tl-card-link { display: inline-block; margin-top: 20px; font-weight: 800; }

.tl-process { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; counter-reset: step; }
.tl-process-item { position: relative; padding: 30px 24px 26px; border: 1px solid rgba(255,255,255,.14); border-radius: 18px; background: rgba(255,255,255,.07); counter-increment: step; }
.tl-process-item::before { content: "0" counter(step); display: block; margin-bottom: 28px; color: #72e0e5; font-size: 14px; font-weight: 800; letter-spacing: .1em; }
.tl-process-item h3 { margin: 0 0 10px; color: var(--tl-white); font-size: 20px; }
.tl-process-item p { margin: 0; color: rgba(255,255,255,.7); font-size: 14px; }

.tl-page-hero { padding: 92px 0 72px; color: var(--tl-white); background: linear-gradient(135deg, var(--tl-navy-deep), var(--tl-navy)); }
.tl-page-hero h1 { max-width: 820px; margin: 0; color: var(--tl-white); font-size: clamp(40px, 6vw, 66px); line-height: 1.05; letter-spacing: -.03em; }
.tl-page-hero p { max-width: 760px; margin: 22px 0 0; color: rgba(255,255,255,.78); font-size: 19px; }
.tl-page-hero .tl-btn--outline { border-color: rgba(255,255,255,.35); color: var(--tl-white); }
.tl-page-hero .tl-btn--outline:hover, .tl-page-hero .tl-btn--outline:focus { background: rgba(255,255,255,.1); color: var(--tl-white); }
.tl-content { padding: 78px 0 92px; }
.tl-content h2 { margin: 42px 0 14px; color: var(--tl-navy-deep); font-size: 34px; line-height: 1.2; }
.tl-content h3 { margin: 28px 0 10px; color: var(--tl-navy-deep); font-size: 22px; }
.tl-content p, .tl-content li { color: var(--tl-muted); }
.tl-two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: start; }
.tl-feature-list { display: grid; gap: 14px; margin: 0; padding: 0; list-style: none; }
.tl-feature-list li { position: relative; padding: 17px 18px 17px 48px; border: 1px solid var(--tl-line); border-radius: 14px; background: var(--tl-white); }
.tl-feature-list li::before { content: "✓"; position: absolute; left: 18px; top: 17px; color: var(--tl-teal-deep); font-weight: 900; }
.tl-note { padding: 26px 28px; border-left: 4px solid var(--tl-teal); border-radius: 0 14px 14px 0; background: var(--tl-mist); }

.tl-cta-band { padding: 70px 0; background: var(--tl-mist); }
.tl-cta-box { display: flex; align-items: center; justify-content: space-between; gap: 28px; padding: 46px; border-radius: 26px; color: var(--tl-white); background: linear-gradient(135deg, var(--tl-navy-deep), var(--tl-navy)); box-shadow: var(--tl-shadow); }
.tl-cta-box h2 { margin: 0; color: var(--tl-white); font-size: 34px; }
.tl-cta-box p { max-width: 660px; margin: 8px 0 0; color: rgba(255,255,255,.76); }

.tl-inquiry { display: grid; gap: 18px; max-width: 760px; }
.tl-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.tl-field label { display: block; margin-bottom: 7px; color: var(--tl-navy-deep); font-size: 14px; font-weight: 800; }
.tl-field input, .tl-field select, .tl-field textarea { width: 100%; border: 1px solid #cbdbe2; border-radius: 12px; padding: 13px 14px; background: var(--tl-white); color: var(--tl-ink); }
.tl-field textarea { min-height: 160px; resize: vertical; }
.tl-consent { display: flex; gap: 10px; align-items: flex-start; color: var(--tl-muted); font-size: 13px; }
.tl-consent input { margin-top: 5px; }
.tl-form-status { padding: 14px 16px; border-radius: 10px; font-weight: 700; }
.tl-form-status--success { color: #175c40; background: #e7f8f0; }
.tl-form-status--error { color: #8b2e2e; background: #fdecec; }
.tl-hp { position: absolute !important; left: -9999px !important; }

/* 1.7.1: unified contact page and quotation form */
.tl-contact-page { padding: 82px 0 96px; background: linear-gradient(180deg,#f7fbfc 0%,#eef8fa 100%); }
.tl-contact-layout { display: grid; grid-template-columns: minmax(0,.88fr) minmax(500px,1.12fr); gap: 60px; align-items: start; }
.tl-contact-intro { padding: 32px 0; }
.tl-contact-intro h1 { max-width: 650px; margin: 0; color: var(--tl-navy-deep); font-size: clamp(46px,5.7vw,70px); line-height: 1.02; letter-spacing: -.035em; }
.tl-contact-lead { margin-top: 26px; color: var(--tl-ink); font-size: 20px; line-height: 1.55; }
.tl-contact-intro > p:not(.tl-eyebrow):not(.tl-contact-lead) { color: var(--tl-muted); }
.tl-contact-details { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 32px; }
.tl-contact-details article { min-height: 124px; padding: 20px; border: 1px solid var(--tl-line); border-radius: 16px; background: rgba(255,255,255,.76); }
.tl-contact-details span { display: block; margin-bottom: 9px; color: var(--tl-teal-deep); font-size: 11px; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }
.tl-contact-details strong { display: block; color: var(--tl-navy-deep); font-size: 15px; line-height: 1.45; overflow-wrap: anywhere; }
.tl-contact-note { margin-top: 26px; padding: 24px 25px; border-left: 4px solid var(--tl-teal); border-radius: 0 15px 15px 0; background: var(--tl-white); box-shadow: 0 9px 26px rgba(5,46,98,.06); }
.tl-contact-note strong { color: var(--tl-navy-deep); }
.tl-contact-note p { margin: 7px 0 0; color: var(--tl-muted); }
.tl-quote-card { padding: 38px; border: 1px solid #c8e3e8; border-radius: 25px; background: var(--tl-white); box-shadow: 0 22px 60px rgba(5,46,98,.12); }
.tl-quote-card h2 { margin: 0 0 12px; color: var(--tl-navy-deep); font-size: clamp(30px,3.4vw,43px); line-height: 1.1; letter-spacing: -.025em; }
.tl-quote-card > p:not(.tl-eyebrow) { margin: 0 0 26px; color: var(--tl-muted); }
.tl-quote-card .tl-inquiry { max-width: none; }
.tl-quote-card .tl-field input,
.tl-quote-card .tl-field select,
.tl-quote-card .tl-field textarea { background: #fbfdfe; }

@media (max-width: 980px) {
  .tl-contact-layout { grid-template-columns: 1fr; gap: 34px; }
  .tl-contact-intro { padding-bottom: 0; }
}

@media (max-width: 680px) {
  .tl-contact-page { padding: 58px 0 70px; }
  .tl-contact-intro { padding-top: 12px; }
  .tl-contact-intro h1 { font-size: 45px; }
  .tl-contact-details { grid-template-columns: 1fr; }
  .tl-contact-details article { min-height: 0; }
  .tl-quote-card { padding: 27px 22px; border-radius: 19px; }
}

.tl-post-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.tl-post-card { overflow: hidden; border: 1px solid var(--tl-line); border-radius: 18px; background: var(--tl-white); }
.tl-post-card__body { padding: 25px; }
.tl-post-card h2 { margin: 0 0 10px; font-size: 22px; }
.tl-meta { color: var(--tl-muted); font-size: 13px; }
.tl-entry { max-width: 840px; margin-inline: auto; }
.tl-entry h1 { color: var(--tl-navy-deep); font-size: clamp(38px, 5vw, 58px); line-height: 1.08; }

/* Optical topic pages */
.tl-optics-hero { overflow: hidden; position: relative; }
.tl-optics-hero::after { content: ""; position: absolute; right: -14vw; top: -32%; width: 52vw; aspect-ratio: 1; border: 1px solid rgba(255,255,255,.14); border-radius: 50%; box-shadow: inset 0 0 0 5vw rgba(255,255,255,.025), inset 0 0 0 11vw rgba(10,162,173,.06); pointer-events: none; }
.tl-optics-hero-grid { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(300px, .75fr); gap: 68px; align-items: center; }
.tl-optics-hero-grid > * { position: relative; z-index: 1; }
.tl-spectrum-card { display: grid; grid-template-columns: 1fr auto; gap: 14px 22px; padding: 30px; border: 1px solid rgba(255,255,255,.2); border-radius: 24px; background: rgba(3,30,66,.58); box-shadow: 0 22px 60px rgba(0,0,0,.18); backdrop-filter: blur(10px); }
.tl-spectrum-card span { color: #9de7ea; font-size: 12px; font-weight: 900; letter-spacing: .12em; }
.tl-spectrum-card b { color: var(--tl-white); font-size: 15px; }
.tl-spectrum-card::before { content: ""; grid-column: 1 / -1; height: 7px; margin-bottom: 8px; border-radius: 99px; background: linear-gradient(90deg,#7657ff,#00b7ff,#20d6bf,#f4bc32,#ed644e,#9f2838); }
.tl-optics-hero--visible { background: radial-gradient(circle at 80% 25%, rgba(31,214,190,.2), transparent 27%), linear-gradient(135deg,#052e62,#0b4d82); }
.tl-optics-hero--infrared { background: radial-gradient(circle at 82% 30%, rgba(238,101,72,.24), transparent 30%), linear-gradient(135deg,#201d38,#77353a 62%,#0b3f7a); }
.tl-breadcrumb { margin-top: 0 !important; font-size: 13px !important; letter-spacing: .03em; }
.tl-breadcrumb a { color: #9de7ea; font-weight: 800; }
.tl-topic-nav { position: sticky; z-index: 20; top: 78px; border-bottom: 1px solid var(--tl-line); background: rgba(255,255,255,.94); backdrop-filter: blur(12px); }
.admin-bar .tl-topic-nav { top: 110px; }
.tl-topic-nav .tl-container { display: flex; gap: 30px; overflow-x: auto; scrollbar-width: none; }
.tl-topic-nav .tl-container::-webkit-scrollbar { display: none; }
.tl-topic-nav a { flex: 0 0 auto; padding: 16px 0 14px; border-bottom: 2px solid transparent; color: var(--tl-muted); font-size: 13px; font-weight: 800; }
.tl-topic-nav a:hover, .tl-topic-nav a:focus { border-color: var(--tl-teal); color: var(--tl-navy-deep); }
.tl-optics-route-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.tl-optics-route { position: relative; overflow: hidden; padding: 42px; border: 1px solid var(--tl-line); border-radius: 26px; background: var(--tl-white); box-shadow: var(--tl-shadow); }
.tl-optics-route::after { content: ""; position: absolute; right: -55px; top: -55px; width: 170px; height: 170px; border: 24px solid rgba(10,162,173,.07); border-radius: 50%; }
.tl-optics-route--infrared::after { border-color: rgba(238,101,72,.09); }
.tl-optics-route h3 { margin: 0 0 14px; font-size: 29px; }
.tl-optics-route p, .tl-optics-route li { color: var(--tl-muted); }
.tl-optics-route ul { margin: 22px 0 0; padding-left: 20px; }
.tl-optics-route li { margin: 7px 0; }
.tl-route-band { display: inline-flex; margin-bottom: 24px; padding: 8px 13px; border-radius: 999px; color: var(--tl-navy-deep); background: var(--tl-mist); font-size: 13px; font-weight: 900; }
.tl-table-wrap { overflow-x: auto; margin: 24px 0; border: 1px solid var(--tl-line); border-radius: 18px; background: var(--tl-white); box-shadow: 0 8px 26px rgba(5,46,98,.05); }
.tl-spec-table { width: 100%; min-width: 760px; border-collapse: collapse; font-size: 14px; line-height: 1.45; }
.tl-spec-table th { padding: 16px 18px; color: var(--tl-white); background: var(--tl-navy-deep); text-align: left; white-space: nowrap; }
.tl-spec-table td { padding: 15px 18px; border-top: 1px solid var(--tl-line); color: var(--tl-muted); vertical-align: top; }
.tl-spec-table tbody tr:nth-child(even) { background: #f7fbfc; }
.tl-spec-table tbody tr:hover { background: var(--tl-mist); }
.tl-spec-group { margin-top: 58px; scroll-margin-top: 150px; }
.tl-spec-group:first-of-type { margin-top: 0; }
.tl-spec-intro { display: grid; grid-template-columns: minmax(280px,.9fr) minmax(300px,1.1fr); gap: 42px; align-items: end; }
.tl-spec-intro h3 { margin: 0; color: var(--tl-navy-deep); font-size: 29px; }
.tl-spec-intro > p { margin: 0; color: var(--tl-muted); }
.tl-metric-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; }
.tl-metric-grid > div { min-height: 132px; padding: 23px; border: 1px solid rgba(255,255,255,.14); border-radius: 17px; background: rgba(255,255,255,.07); }
.tl-metric-grid b { display: block; margin-bottom: 20px; color: #72e0e5; font-size: 13px; letter-spacing: .1em; }
.tl-metric-grid span { color: rgba(255,255,255,.8); font-size: 14px; }
#families, #parameters, #applications, #visible-rfq, #infrared-rfq, #workflow, #rfq-checklist, #choose-a-band, #reference-configurations { scroll-margin-top: 145px; }

.tl-site-footer { padding: 66px 0 26px; color: rgba(255,255,255,.74); background: #041f42; }
.tl-footer-grid { display: grid; grid-template-columns: 1.4fr .7fr .7fr; gap: 55px; }
.tl-footer-brand .tl-brand-name { color: var(--tl-white); }
.tl-footer-brand .tl-brand-tag { color: rgba(255,255,255,.55); }
.tl-footer-brand p { max-width: 460px; }
.tl-site-footer h3 { margin: 0 0 15px; color: var(--tl-white); font-size: 15px; letter-spacing: .07em; text-transform: uppercase; }
.tl-site-footer ul { margin: 0; padding: 0; list-style: none; }
.tl-site-footer li { margin: 8px 0; }
.tl-site-footer a { color: rgba(255,255,255,.74); }
.tl-site-footer a:hover { color: #72e0e5; }
.tl-footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 46px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12); font-size: 12px; }

.screen-reader-text { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

@media (max-width: 980px) {
  .admin-bar .tl-site-header { top: 46px; }
  .tl-header-cta { display: none; }
  .tl-menu-toggle { display: inline-flex; }
  .tl-main-nav { display: none; position: absolute; inset: 78px 0 auto; padding: 18px 20px 24px; border-bottom: 1px solid var(--tl-line); background: var(--tl-white); box-shadow: var(--tl-shadow); }
  .tl-main-nav.is-open { display: block; }
  .tl-main-nav ul { width: min(100%, var(--tl-width)); margin-inline: auto; flex-direction: column; align-items: stretch; gap: 0; }
  .tl-main-nav a { display: block; padding: 11px 0; }
  .tl-hero-grid { grid-template-columns: 1fr; gap: 45px; }
  .tl-hero-mark { min-height: 290px; }
  .tl-trust-grid, .tl-process { grid-template-columns: repeat(2, 1fr); }
  .tl-card-grid, .tl-post-grid { grid-template-columns: 1fr 1fr; }
  .tl-optics-hero-grid { grid-template-columns: 1fr; gap: 38px; }
  .tl-optics-route-grid { grid-template-columns: 1fr; }
  .tl-metric-grid { grid-template-columns: repeat(2,1fr); }
  .tl-footer-grid { grid-template-columns: 1fr 1fr; }
  .tl-footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 680px) {
  .tl-container { width: min(calc(100% - 28px), var(--tl-width)); }
  .tl-header-inner { min-height: 70px; gap: 12px; }
  .tl-main-nav { inset: 70px 0 auto; }
  .tl-brand { gap: 8px; min-width: 0; }
  .tl-brand img { width: 40px; height: 40px; }
  .tl-brand-name { font-size: 17px; letter-spacing: .025em; white-space: nowrap; }
  .tl-brand-tag { display: none; }
  .tl-hero { padding: 76px 0 68px; }
  .tl-hero h1 { font-size: 42px; }
  .tl-hero-mark { min-height: 245px; }
  .tl-trust-grid, .tl-process, .tl-card-grid, .tl-post-grid, .tl-two-col, .tl-form-row, .tl-footer-grid { grid-template-columns: 1fr; }
  .tl-optics-route { padding: 30px 24px; }
  .tl-spectrum-card { padding: 23px; }
  .tl-topic-nav { top: 70px; }
  .admin-bar .tl-topic-nav { top: 116px; }
  .tl-topic-nav .tl-container { gap: 22px; }
  .tl-spec-intro, .tl-metric-grid { grid-template-columns: 1fr; }
  .tl-trust-item { border-right: 0; border-bottom: 1px solid var(--tl-line); }
  .tl-section, .tl-content { padding: 66px 0; }
  .tl-section-head, .tl-cta-box, .tl-footer-bottom { align-items: flex-start; flex-direction: column; }
  .tl-cta-box { padding: 32px 25px; }
  .tl-footer-brand { grid-column: auto; }
}

/* 1.5.0: compact B2B navigation, product catalog and persistent contact */
.tl-header-utility { min-height: 31px; color: rgba(255,255,255,.78); background: var(--tl-navy-deep); font-size: 12px; }
.tl-header-utility .tl-container { min-height: 31px; display: flex; align-items: center; justify-content: flex-end; gap: 24px; }
.tl-header-utility a { color: #92e9ec; font-weight: 800; }
.tl-header-inner { min-height: 70px; gap: 18px; }
.tl-main-nav > ul { gap: 5px; }
.tl-main-nav > ul > li { position: relative; display: flex; align-items: center; }
.tl-main-nav > ul > li > a { padding: 12px 10px; white-space: nowrap; }
.tl-main-nav .menu-item-has-children > a { padding-right: 3px; }
.submenu-toggle { display: inline-grid; place-items: center; width: 28px; height: 34px; padding: 0; border: 0; color: var(--tl-navy-deep); background: transparent; cursor: pointer; }
.submenu-toggle span { transition: transform .2s ease; }
.submenu-toggle[aria-expanded="true"] span { transform: rotate(180deg); }
.tl-main-nav .sub-menu { position: absolute; left: 0; top: calc(100% + 1px); display: grid; min-width: 260px; padding: 10px; gap: 2px; border: 1px solid var(--tl-line); border-radius: 15px; background: var(--tl-white); box-shadow: var(--tl-shadow); opacity: 0; visibility: hidden; transform: translateY(8px); transition: opacity .18s ease, transform .18s ease, visibility .18s; }
.tl-main-nav .sub-menu li { display: block; }
.tl-main-nav .sub-menu a { display: block; padding: 11px 13px; border-radius: 9px; font-size: 13px; white-space: nowrap; }
.tl-main-nav .sub-menu a:hover, .tl-main-nav .sub-menu a:focus { color: var(--tl-navy-deep); background: var(--tl-mist); }
.tl-main-nav li:hover > .sub-menu, .tl-main-nav li:focus-within > .sub-menu, .tl-main-nav li.submenu-open > .sub-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.tl-header-cta { min-height: 44px; padding: 10px 18px; white-space: nowrap; }
.tl-topic-nav { top: 101px; }
.admin-bar .tl-topic-nav { top: 133px; }
.tl-card-grid--two { grid-template-columns: repeat(2, minmax(0,1fr)); }
.tl-optics-route-grid--four { grid-template-columns: repeat(2, minmax(0,1fr)); }
.tl-contact-panel { padding: 32px; border: 1px solid #c9e7e9; border-radius: 22px; background: linear-gradient(145deg,#fff,#effafa); box-shadow: 0 14px 40px rgba(5,46,98,.08); }
.tl-contact-panel span { display: block; color: var(--tl-muted); font-size: 12px; font-weight: 900; letter-spacing: .13em; text-transform: uppercase; }
.tl-contact-panel a { display: inline-block; margin-top: 7px; color: var(--tl-navy-deep); font-size: clamp(22px,3vw,31px); font-weight: 900; line-height: 1.2; overflow-wrap: anywhere; }
.tl-contact-panel p { margin: 15px 0 0; }
.tl-footer-contact { padding-top: 14px; border-top: 1px solid rgba(255,255,255,.12); }
.tl-footer-contact a { color: #92e9ec; font-weight: 900; }

.tl-product-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 26px; }
.tl-product-card { overflow: hidden; border: 1px solid var(--tl-line); border-radius: 24px; background: var(--tl-white); box-shadow: 0 12px 38px rgba(5,46,98,.08); transition: transform .22s ease, box-shadow .22s ease; scroll-margin-top: 150px; }
.tl-product-card:hover { transform: translateY(-4px); box-shadow: 0 20px 52px rgba(5,46,98,.14); }
.tl-product-media { overflow: hidden; aspect-ratio: 720 / 520; border-bottom: 1px solid var(--tl-line); background: #f6f9fa; }
.tl-product-media img { width: 100%; height: 100%; object-fit: contain; transition: transform .35s ease; }
.tl-product-card:hover .tl-product-media img { transform: scale(1.035); }
.tl-product-body { padding: 28px; }
.tl-product-body h3 { margin: 14px 0 10px; font-size: 24px; }
.tl-product-body > p { margin: 0; }
.tl-product-badges { display: flex; flex-wrap: wrap; gap: 7px; }
.tl-product-badges span { padding: 6px 9px; border-radius: 999px; color: var(--tl-navy-deep); background: var(--tl-mist); font-size: 11px; font-weight: 900; }
.tl-product-facts { display: grid; margin: 22px 0 0; padding: 0; border-top: 1px solid var(--tl-line); list-style: none; }
.tl-product-facts li { display: grid; grid-template-columns: minmax(115px,.8fr) minmax(0,1.2fr); gap: 14px; padding: 10px 0; border-bottom: 1px solid var(--tl-line); font-size: 13px; }
.tl-product-facts span { color: var(--tl-muted); }
.tl-product-facts strong { color: var(--tl-ink); text-align: right; }
.tl-product-details { margin-top: 18px; border: 1px solid var(--tl-line); border-radius: 13px; background: #fbfdfe; }
.tl-product-details summary { padding: 12px 15px; color: var(--tl-navy-deep); font-size: 13px; font-weight: 900; cursor: pointer; }
.tl-product-details[open] summary { border-bottom: 1px solid var(--tl-line); }
.tl-product-details dl { margin: 0; padding: 4px 15px 12px; }
.tl-product-details dl div { display: grid; grid-template-columns: minmax(120px,.8fr) minmax(0,1.2fr); gap: 12px; padding: 8px 0; border-bottom: 1px dashed var(--tl-line); font-size: 12px; }
.tl-product-details dl div:last-child { border: 0; }
.tl-product-details dt { color: var(--tl-muted); }
.tl-product-details dd { margin: 0; color: var(--tl-ink); text-align: right; font-weight: 700; }
.tl-product-rfq { display: inline-flex; margin-top: 18px; font-size: 14px; font-weight: 900; }
#optical-families, #selection, #visit, #objectives, #eyepieces, #visible-guide, #mwir, #lwir-focus, #lwir, #infrared-guide { scroll-margin-top: 150px; }

@media (max-width: 1180px) {
  .tl-brand-name { font-size: 19px; }
  .tl-brand-tag { display: none; }
  .tl-main-nav > ul > li > a { padding-inline: 8px; font-size: 13px; }
}

@media (max-width: 980px) {
  .tl-header-inner { min-height: 66px; }
  .tl-main-nav { inset: 97px 0 auto; max-height: calc(100vh - 97px); overflow-y: auto; }
  .tl-main-nav > ul { align-items: stretch; }
  .tl-main-nav > ul > li { display: grid; grid-template-columns: 1fr auto; }
  .tl-main-nav > ul > li > a { padding: 12px 6px; }
  .tl-main-nav .sub-menu { position: static; grid-column: 1 / -1; display: none; min-width: 0; margin: 0 0 8px; padding: 4px 12px; border: 0; border-left: 2px solid var(--tl-teal); border-radius: 0; box-shadow: none; opacity: 1; visibility: visible; transform: none; }
  .tl-main-nav li.submenu-open > .sub-menu { display: grid; }
  .tl-main-nav li:hover > .sub-menu:not(:focus-within) { display: none; }
  .tl-main-nav li.submenu-open:hover > .sub-menu { display: grid; }
  .tl-main-nav .sub-menu a { white-space: normal; }
  .tl-topic-nav { top: 97px; }
  .admin-bar .tl-topic-nav { top: 143px; }
}

@media (max-width: 680px) {
  .tl-header-utility { min-height: 30px; }
  .tl-header-utility .tl-container { min-height: 30px; justify-content: center; }
  .tl-header-utility span { display: none; }
  .tl-header-inner { min-height: 62px; }
  .tl-main-nav { inset: 92px 0 auto; max-height: calc(100vh - 92px); }
  .tl-topic-nav { top: 92px; }
  .admin-bar .tl-topic-nav { top: 138px; }
  .tl-card-grid--two, .tl-optics-route-grid--four, .tl-product-grid { grid-template-columns: 1fr; }
  .tl-product-body { padding: 23px; }
  .tl-product-facts li, .tl-product-details dl div { grid-template-columns: 1fr; gap: 2px; }
  .tl-product-facts strong, .tl-product-details dd { text-align: left; }
}

/* 1.6.0: precision optical component hub and SEO category pages */
.tl-precision-hero-grid,
.tl-precision-detail-grid { display: grid; grid-template-columns: minmax(0,1.18fr) minmax(340px,.82fr); align-items: center; gap: 58px; }
.tl-category-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 26px; }
.tl-category-card { overflow: hidden; border: 1px solid var(--tl-line); border-radius: 24px; background: var(--tl-white); box-shadow: 0 12px 38px rgba(5,46,98,.08); transition: transform .22s ease, box-shadow .22s ease; }
.tl-category-card:hover { transform: translateY(-4px); box-shadow: 0 20px 52px rgba(5,46,98,.14); }
.tl-category-media { display: block; overflow: hidden; aspect-ratio: 4 / 3; border-bottom: 1px solid var(--tl-line); background: #f8fafb; }
.tl-category-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.tl-category-card:hover .tl-category-media img { transform: scale(1.035); }
.tl-category-body { padding: 25px; }
.tl-category-body h3 { margin: 8px 0 11px; font-size: 23px; }
.tl-category-body h3 a { color: var(--tl-navy-deep); }
.tl-category-body > p:not(.tl-card-kicker) { min-height: 78px; margin-bottom: 18px; }
.tl-detail-figure { overflow: hidden; margin: 0; border: 1px solid var(--tl-line); border-radius: 24px; background: var(--tl-white); box-shadow: var(--tl-shadow); }
.tl-detail-figure img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.tl-detail-figure figcaption { padding: 12px 16px; color: var(--tl-muted); background: #f7fafb; font-size: 12px; }
.tl-three-col { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 26px; }
.tl-scope-grid article { padding: 30px; border: 1px solid var(--tl-line); border-radius: 22px; background: var(--tl-white); box-shadow: 0 10px 30px rgba(5,46,98,.06); }
.tl-scope-grid h2 { margin: 8px 0 18px; font-size: 25px; }
.tl-scope-grid p { color: var(--tl-muted); }
.tl-spec-table tbody th { width: 28%; padding: 15px 18px; border-top: 1px solid var(--tl-line); color: var(--tl-navy-deep); background: #fff; text-align: left; vertical-align: top; }
.tl-spec-table tbody tr:nth-child(even) th { background: #f7fbfc; }
.tl-rfq-list { margin: 25px 0; padding: 0; list-style: none; counter-reset: tl-rfq; }
.tl-rfq-list li { position: relative; min-height: 42px; margin: 0 0 14px; padding: 9px 0 9px 54px; color: var(--tl-ink); counter-increment: tl-rfq; }
.tl-rfq-list li::before { content: counter(tl-rfq,decimal-leading-zero); position: absolute; left: 0; top: 0; display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%; color: var(--tl-white); background: linear-gradient(145deg,var(--tl-navy),var(--tl-teal)); font-size: 12px; font-weight: 900; }
.tl-contact-panel .tl-btn { margin-top: 22px; color: var(--tl-white); font-size: 14px; }
.tl-faq-list { display: grid; gap: 13px; max-width: 900px; }
.tl-faq-list details { overflow: hidden; border: 1px solid var(--tl-line); border-radius: 15px; background: var(--tl-white); }
.tl-faq-list summary { position: relative; padding: 20px 58px 20px 22px; color: var(--tl-navy-deep); font-weight: 900; cursor: pointer; list-style: none; }
.tl-faq-list summary::-webkit-details-marker { display: none; }
.tl-faq-list summary::after { content: "+"; position: absolute; right: 22px; top: 15px; color: var(--tl-teal); font-size: 26px; line-height: 1; }
.tl-faq-list details[open] summary::after { content: "–"; }
.tl-faq-list details p { margin: 0; padding: 0 22px 20px; color: var(--tl-muted); }
.tl-related-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 14px; }
.tl-related-grid a { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 76px; padding: 18px 20px; border: 1px solid var(--tl-line); border-radius: 14px; background: var(--tl-white); transition: border-color .18s ease, background .18s ease; }
.tl-related-grid a:hover { border-color: #9bd8dc; background: var(--tl-mist); }
.tl-related-grid span { color: var(--tl-navy-deep); font-weight: 900; }
.tl-related-grid b { color: var(--tl-teal-deep); font-size: 12px; white-space: nowrap; }
#component-families, #lens-assemblies, #optics-rfq, #product-scope, #reference-parameters, #rfq-inputs, #faq { scroll-margin-top: 150px; }

@media (max-width: 980px) {
  .tl-precision-hero-grid,
  .tl-precision-detail-grid { grid-template-columns: 1fr; gap: 36px; }
  .tl-category-grid,
  .tl-three-col { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .tl-related-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
}

@media (max-width: 680px) {
  .tl-category-grid,
  .tl-three-col,
  .tl-related-grid { grid-template-columns: 1fr; }
  .tl-category-body > p:not(.tl-card-kicker) { min-height: 0; }
  .tl-detail-figure { border-radius: 18px; }
  .tl-spec-table tbody th { width: auto; }
}

/* 1.7.0: visual corporate profile based on the approved company brochure */
.tl-about-hero { padding: 74px 0; color: var(--tl-white); background: linear-gradient(125deg,#062d63 0%,#0a467b 58%,#087d8b 100%); }
.tl-about-hero-grid { display: grid; grid-template-columns: minmax(0,1.06fr) minmax(430px,.94fr); gap: 54px; align-items: center; }
.tl-about-hero-copy h1 { max-width: 680px; margin: 15px 0 25px; color: var(--tl-white); font-size: clamp(42px,4.3vw,56px); line-height: 1.05; letter-spacing: -.03em; }
.tl-about-hero-copy .tl-hero-lead { max-width: 690px; color: rgba(255,255,255,.82); }
.tl-about-hero .tl-btn--outline { color: var(--tl-white); border-color: rgba(255,255,255,.55); }
.tl-about-hero .tl-btn--outline:hover { color: var(--tl-navy-deep); background: var(--tl-white); }
.tl-about-hero-media { overflow: hidden; margin: 0; border: 1px solid rgba(255,255,255,.22); border-radius: 28px; background: #082f61; box-shadow: 0 28px 70px rgba(0,16,42,.32); }
.tl-about-hero-media img { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.tl-about-hero-media figcaption { padding: 14px 18px; color: rgba(255,255,255,.7); font-size: 12px; }
.tl-about-intro { display: grid; grid-template-columns: minmax(0,.86fr) minmax(0,1.14fr); gap: 64px; align-items: start; }
.tl-about-intro h2 { margin: 10px 0 0; font-size: clamp(32px,4vw,48px); }
.tl-about-intro p:first-child { margin-top: 0; }
.tl-about-facts { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 15px; margin-top: 48px; }
.tl-about-facts article { min-height: 132px; padding: 24px; border: 1px solid var(--tl-line); border-radius: 18px; background: #f7fbfc; }
.tl-about-facts span { display: block; margin-bottom: 18px; color: var(--tl-teal-deep); font-size: 11px; font-weight: 900; letter-spacing: .11em; text-transform: uppercase; }
.tl-about-facts strong { color: var(--tl-navy-deep); font-size: 17px; line-height: 1.35; }
.tl-about-facts a { color: inherit; overflow-wrap: anywhere; }
.tl-about-product-grid { display: grid; grid-template-columns: minmax(420px,1.04fr) minmax(0,.96fr); gap: 58px; align-items: center; }
.tl-about-product-media { overflow: hidden; margin: 0; border: 1px solid var(--tl-line); border-radius: 27px; background: var(--tl-white); box-shadow: var(--tl-shadow); }
.tl-about-product-media img { display: block; width: 100%; aspect-ratio: 3 / 2; object-fit: cover; }
.tl-about-product-copy h2 { margin: 10px 0 22px; font-size: clamp(32px,4vw,48px); }
.tl-about-product-links { display: grid; gap: 11px; margin-top: 28px; }
.tl-about-product-links a { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 17px 19px; border: 1px solid #b9dfe2; border-radius: 13px; background: var(--tl-white); }
.tl-about-product-links span { color: var(--tl-navy-deep); font-weight: 900; }
.tl-about-product-links b { color: var(--tl-teal-deep); font-size: 12px; white-space: nowrap; }
.tl-about-workflow { display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); gap: 14px; }
.tl-about-workflow article { min-height: 230px; padding: 25px 21px; border: 1px solid rgba(255,255,255,.14); border-radius: 18px; background: rgba(255,255,255,.065); }
.tl-about-workflow b { color: #74e4e7; font-size: 12px; letter-spacing: .12em; }
.tl-about-workflow h3 { margin: 25px 0 11px; color: var(--tl-white); font-size: 19px; }
.tl-about-workflow p { margin: 0; color: rgba(255,255,255,.7); font-size: 14px; }

@media (max-width: 980px) {
  .tl-about-hero-grid,
  .tl-about-intro,
  .tl-about-product-grid { grid-template-columns: 1fr; }
  .tl-about-hero-grid { gap: 38px; }
  .tl-about-facts { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .tl-about-workflow { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .tl-about-workflow article { min-height: 0; }
}

@media (max-width: 680px) {
  .tl-about-hero { padding: 62px 0 54px; }
  .tl-about-hero-copy h1 { font-size: 42px; }
  .tl-about-hero-media { border-radius: 19px; }
  .tl-about-hero-media figcaption { font-size: 11px; }
  .tl-about-intro { gap: 24px; }
  .tl-about-facts,
  .tl-about-workflow { grid-template-columns: 1fr; }
  .tl-about-facts article { min-height: 0; }
  .tl-about-product-links a { align-items: flex-start; flex-direction: column; gap: 6px; }
}