/* ==========================================================================
   Anhui Tiankang Group — design system
   Palette / grid / rhythm aligned with the reference industrial-cable layout:
   dark navy header, orange primary action, 1240px grid, 84px section rhythm.
   ========================================================================== */

:root {
  --navy: #071828;
  --navy-2: #0c263c;
  --blue: #0c5f91;
  --orange: #e86f2c;
  --orange-dark: #c95417;
  --ink: #17212b;
  --body: #526171;
  --muted: #667381;
  --line: #dce3e8;
  --soft: #f3f6f8;
  --white: #ffffff;
  --max: 1240px;
  --radius: 16px;
  --shadow: 0 18px 50px rgba(7, 24, 40, .12);
  --header-h: 78px;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 18px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--white);
  color: var(--body);
  font-family: Arial, Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
picture { display: contents; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
ul { margin: 0; padding: 0; list-style: none; }

/* sub-pages (privacy / legal) sit under the fixed header */
body.page-legal { padding-top: var(--header-h); }

h1, h2, h3, h4 { margin: 0 0 16px; color: var(--navy); line-height: 1.12; font-weight: 800; }
h1 { font-size: clamp(40px, 5.4vw, 74px); letter-spacing: -.045em; }
h2 { font-size: clamp(30px, 3.1vw, 48px); letter-spacing: -.03em; }
h3 { font-size: 23px; letter-spacing: -.02em; }
h4 { font-size: 14px; letter-spacing: .1em; text-transform: uppercase; }
p { margin: 0 0 16px; }

.container { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }

.eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  color: var(--orange-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.eyebrow.light { color: #ffad7c; }

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--navy);
  font-weight: 800;
  font-size: 15px;
  white-space: nowrap;
}
.text-link .arrow { color: var(--orange); transition: transform .2s ease; }
.text-link:hover .arrow { transform: translateX(4px); }

/* ---------- buttons ---------- */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 52px;
  padding: 0 26px;
  border: 1px solid var(--orange);
  border-radius: 4px;
  background: var(--orange);
  color: var(--white);
  font-size: 15px;
  font-weight: 750;
  cursor: pointer;
  transition: background .2s ease, border-color .2s ease, color .2s ease, transform .2s ease;
}
.button:hover { background: var(--orange-dark); border-color: var(--orange-dark); transform: translateY(-1px); }
.button-ghost { background: rgba(255, 255, 255, .07); border-color: rgba(255, 255, 255, .55); }
.button-ghost:hover { background: var(--white); border-color: var(--white); color: var(--navy); }
.button-small { min-height: 42px; padding: 0 18px; font-size: 14px; }
.button.full { width: 100%; }

/* ---------- header ---------- */
.site-header {
  position: fixed;
  z-index: 90;
  top: 0;
  left: 0;
  right: 0;
  color: var(--white);
  background: rgba(6, 22, 36, .93);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 26px;
  height: var(--header-h);
}
.brand { display: flex; align-items: center; gap: 11px; color: var(--white); flex: none; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 3px;
  background: var(--orange);
  color: var(--white);
  font-size: 19px;
  font-weight: 900;
  line-height: 1;
}
.brand-text strong { display: block; font-size: 15.5px; line-height: 1.15; letter-spacing: .01em; }
.brand-text small {
  display: block;
  margin-top: 4px;
  color: rgba(255, 255, 255, .55);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.nav { margin-left: auto; }
.nav ul { display: flex; align-items: stretch; gap: 26px; }
.nav-item { position: relative; display: flex; }
.nav-item > a {
  position: relative;
  display: flex;
  align-items: center;
  padding: 28px 0;
  color: rgba(255, 255, 255, .82);
  font-size: 14.5px;
  font-weight: 650;
  white-space: nowrap;
}
.nav-item > a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 18px;
  height: 2px;
  background: var(--orange);
  transition: right .2s ease;
}
.nav-item > a:hover, .nav-item > a.active, .nav-item:focus-within > a { color: var(--white); }
.nav-item > a:hover::after, .nav-item > a.active::after, .nav-item:focus-within > a::after { right: 0; }

.nav-dropdown {
  position: absolute;
  top: 100%;
  left: -18px;
  min-width: 296px;
  padding: 10px;
  background: rgba(6, 22, 36, .98);
  border: 1px solid rgba(255, 255, 255, .12);
  box-shadow: 0 18px 40px rgba(0, 0, 0, .28);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity .18s ease, transform .18s ease, visibility .18s ease;
}
.nav-item:hover .nav-dropdown,
.nav-item:focus-within .nav-dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-dropdown-heading {
  display: block;
  padding: 10px 12px 8px;
  color: #ffad7c;
  font-size: 10.5px;
  font-weight: 900;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.nav-dropdown a {
  display: block;
  padding: 9px 12px;
  color: rgba(255, 255, 255, .76);
  font-size: 13.5px;
  line-height: 1.35;
}
.nav-dropdown a:hover { color: var(--white); background: rgba(255, 255, 255, .08); }

.header-actions { display: flex; align-items: center; gap: 12px; flex: none; }
.lang-switch {
  min-height: 42px;
  padding: 0 14px;
  border: 1px solid rgba(255, 255, 255, .35);
  border-radius: 4px;
  background: transparent;
  color: var(--white);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: .2s ease;
}
.lang-switch:hover { background: rgba(255, 255, 255, .12); }

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, .35);
  border-radius: 4px;
  background: transparent;
  cursor: pointer;
}
.menu-toggle i {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--white);
  transition: .2s ease;
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 830px;
  padding: 150px 0 200px;
  overflow: hidden;
  color: var(--white);
  background: var(--navy);
}
.hero-media { position: absolute; inset: 0; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(3, 15, 25, .95), rgba(3, 15, 25, .74) 46%, rgba(3, 15, 25, .32)),
    linear-gradient(0deg, rgba(3, 15, 25, .62), transparent 48%);
}
.hero-content { position: relative; z-index: 2; }
.hero-kicker {
  margin: 0 0 20px;
  color: #ffb083;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.hero h1 { max-width: 920px; margin: 0 0 22px; color: var(--white); }
.hero-lead { max-width: 660px; margin: 0; color: rgba(255, 255, 255, .82); font-size: 20px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }

.hero-stats {
  position: absolute;
  z-index: 3;
  left: 0;
  right: 0;
  bottom: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding-inline: max(20px, calc((100% - var(--max)) / 2));
  background: rgba(4, 18, 29, .9);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-top: 1px solid rgba(255, 255, 255, .13);
}
.hero-stats > div {
  min-height: 118px;
  padding: 26px 32px 26px 0;
  border-right: 1px solid rgba(255, 255, 255, .12);
}
.hero-stats > div:last-child { border-right: 0; }
.hero-stats strong { display: block; color: #ffad7c; font-size: 30px; line-height: 1; letter-spacing: -.02em; }
.hero-stats span { display: block; margin-top: 10px; color: rgba(255, 255, 255, .68); font-size: 13px; }

/* ---------- sections ---------- */
.section { padding: 84px 0; }
.section-soft { background: var(--soft); }

.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 48px;
  margin-bottom: 40px;
}
.section-heading > div { max-width: 780px; }
.section-heading > div > :last-child { margin-bottom: 0; }
.section-heading > p { max-width: 470px; margin: 0; font-size: 16.5px; }
.section-heading h2 { margin-bottom: 0; }

.disclaimer {
  margin: 26px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

/* ---------- product portfolio rows ---------- */
.portfolio-list { border-top: 1px solid var(--line); }
.portfolio-row {
  display: grid;
  grid-template-columns: 56px 236px minmax(0, 1fr) 52px;
  align-items: center;
  gap: 30px;
  padding: 24px 6px;
  border-bottom: 1px solid var(--line);
  transition: background .22s ease, padding .22s ease;
}
.portfolio-row:hover { background: var(--soft); padding-left: 18px; padding-right: 12px; }
.row-number { color: var(--orange); font-size: 13px; font-weight: 800; letter-spacing: .1em; }
.row-media {
  overflow: hidden;
  aspect-ratio: 4 / 3;
  border-radius: 4px;
  background: #dbe3e9;
}
.row-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.row-media svg { display: block; width: 100%; height: 100%; }
.portfolio-row:hover .row-media img { transform: scale(1.05); }
.row-copy h3 { margin: 0 0 8px; font-size: 24px; }
.row-copy p { margin: 0; color: #5a6b7b; font-size: 15px; line-height: 1.6; }
.row-arrow {
  justify-self: end;
  color: var(--orange);
  font-size: 22px;
  transition: transform .22s ease;
}
.portfolio-row:hover .row-arrow { transform: translateX(6px); }

/* ---------- evidence cards ---------- */
.evidence-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.evidence-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: 0 10px 30px rgba(7, 24, 40, .05);
  transition: transform .25s ease, box-shadow .25s ease;
}
.evidence-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.evidence-image { aspect-ratio: 4 / 3; overflow: hidden; background: #dbe3e9; }
.evidence-image img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; }
.evidence-card:hover .evidence-image img { transform: scale(1.04); }
.evidence-body { padding: 26px 28px 30px; }
.evidence-body h3 { margin-bottom: 10px; font-size: 21px; }
.evidence-body p { margin: 0; font-size: 15.5px; line-height: 1.62; }

/* ---------- feature band ---------- */
.feature-band { padding: 90px 0; background: linear-gradient(135deg, var(--navy), #103c58); color: rgba(255, 255, 255, .82); }
.feature-inner { display: grid; grid-template-columns: 1fr .85fr; align-items: center; gap: 64px; }
.feature-copy h2 { color: var(--white); margin-bottom: 18px; }
.feature-copy p { max-width: 560px; }
.chip-list { display: flex; flex-wrap: wrap; gap: 10px; margin: 26px 0 30px; }
.chip-list li {
  padding: 8px 14px;
  border: 1px solid rgba(255, 255, 255, .26);
  border-radius: 999px;
  color: rgba(255, 255, 255, .9);
  font-size: 13px;
  font-weight: 600;
}
.feature-media { position: relative; }
.feature-media img { width: 100%; max-height: 520px; object-fit: cover; border-radius: 4px; }
.feature-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 18px 22px;
  background: linear-gradient(0deg, rgba(4, 18, 29, .92), rgba(4, 18, 29, .1));
}
.feature-caption strong { display: block; color: #ffad7c; font-size: 11px; letter-spacing: .14em; }
.feature-caption span { display: block; margin-top: 4px; color: var(--white); font-size: 13px; }

/* ---------- applications ---------- */
.application-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.app-card {
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.app-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: transparent; }
.app-media { aspect-ratio: 4 / 3; overflow: hidden; background: #dbe3e9; }
.app-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.app-card:hover .app-media img { transform: scale(1.05); }
.app-body { position: relative; padding: 22px 22px 26px; }
.app-number {
  display: block;
  margin-bottom: 10px;
  color: var(--orange);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .12em;
}
.app-body h3 { margin-bottom: 8px; font-size: 19px; }
.app-body p { margin: 0; font-size: 14px; line-height: 1.55; color: var(--muted); }

/* ---------- process ---------- */
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid var(--line); }
.process-step { padding: 34px 28px 8px 0; border-right: 1px solid var(--line); }
.process-step:last-child { border-right: 0; padding-right: 0; }
.process-step + .process-step { padding-left: 28px; }
.step-number { display: block; color: var(--orange); font-size: 13px; font-weight: 800; letter-spacing: .1em; }
.process-step h3 { margin: 14px 0 8px; font-size: 21px; }
.process-step p { margin: 0; font-size: 15px; }

/* ---------- split (quality) ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 64px; }
.split-copy h2 { margin-bottom: 18px; }
.split-media img { width: 100%; border-radius: 4px; }
.check-list { margin: 24px 0 28px; }
.check-list li {
  position: relative;
  padding-left: 30px;
  margin-bottom: 12px;
  font-size: 15.5px;
  color: #4a5b6b;
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: rgba(232, 111, 44, .14);
  box-shadow: inset 0 0 0 1px rgba(232, 111, 44, .5);
}
.check-list li::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 11px;
  width: 6px;
  height: 3px;
  border-left: 2px solid var(--orange);
  border-bottom: 2px solid var(--orange);
  transform: rotate(-45deg);
}

/* ---------- about ---------- */
.about-grid { display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 64px; }
.about-copy h2 { margin-bottom: 18px; }
.about-facts { display: flex; gap: 44px; margin-top: 30px; padding-top: 26px; border-top: 1px solid var(--line); }
.about-facts strong { display: block; color: var(--navy); font-size: 26px; letter-spacing: -.02em; }
.about-facts span { display: block; margin-top: 4px; color: var(--muted); font-size: 13px; }
.about-media { position: relative; }
.about-media img { width: 100%; border-radius: 4px; }
.about-caption {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 18px;
  padding: 16px 20px;
  background: rgba(7, 24, 40, .88);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}
.about-caption span { display: block; color: #ffad7c; font-size: 10.5px; font-weight: 800; letter-spacing: .14em; }
.about-caption strong { display: block; margin-top: 6px; color: var(--white); font-size: 14.5px; line-height: 1.45; }

/* ---------- full range ---------- */
.range-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.range-panel.wide { grid-column: 1 / -1; }
.range-panel.wide .range-list { columns: 2; column-gap: 44px; }

/* ---------- video band ---------- */
.video-band { padding: 90px 0; background: linear-gradient(135deg, var(--navy), #103c58); color: rgba(255, 255, 255, .82); }
.video-band h2 { color: var(--white); }
.video-frame { margin: 0; max-width: 860px; }
.video-frame video { display: block; width: 100%; height: auto; background: #000; border-radius: 10px; box-shadow: 0 24px 60px rgba(0, 0, 0, .45); }
.video-frame figcaption { margin-top: 14px; color: rgba(255, 255, 255, .6); font-size: 13px; }

/* ---------- downloads ---------- */
.download-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.download-card {
  display: flex; flex-direction: column;
  background: var(--white); border: 1px solid var(--line);
  overflow: hidden; text-decoration: none;
  transition: transform .25s ease, box-shadow .25s ease;
}
.download-card:hover { transform: translateY(-4px); box-shadow: 0 18px 40px rgba(7, 24, 40, .14); }
.dl-cover { aspect-ratio: 4 / 5; overflow: hidden; background: #eef2f5; }
.dl-cover img { width: 100%; height: 100%; object-fit: cover; }
.dl-body { display: flex; flex-direction: column; gap: 6px; padding: 14px 14px 16px; flex: 1; }
.dl-body h3 { font-size: 15px; line-height: 1.35; color: var(--navy); }
.dl-body p { margin: 0; color: var(--muted); font-size: 12.5px; }
.dl-link { margin-top: auto; padding-top: 10px; color: var(--orange); font-size: 13px; font-weight: 700; }

/* light-theme honor chips (about section) */
.about-copy .chip-list { margin: 26px 0 10px; }
.about-copy .chip-list li { border-color: #c3ced7; color: #3c4c5a; background: var(--white); }
.range-panel { padding: 34px 34px 30px; background: var(--white); border: 1px solid var(--line); }
.range-panel h3 { margin-bottom: 18px; padding-bottom: 16px; border-bottom: 2px solid var(--orange); font-size: 20px; }
.range-list { columns: 2; column-gap: 28px; }
.range-list li {
  break-inside: avoid;
  margin-bottom: 9px;
  padding-left: 14px;
  position: relative;
  color: #55677a;
  font-size: 13.5px;
  line-height: 1.5;
}
.range-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--orange);
}

/* ---------- faq ---------- */
.faq-wrap .section-heading { margin-bottom: 26px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 0;
  color: var(--navy);
  font-size: 17px;
  font-weight: 750;
  cursor: pointer;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  flex: none;
  color: var(--orange);
  font-size: 24px;
  font-weight: 400;
  line-height: 1;
}
.faq-item[open] summary::after { content: "–"; }
.faq-item p { max-width: 900px; margin: 0 0 24px; padding-right: 40px; font-size: 15.5px; }

/* ---------- quote / contact ---------- */
.quote-section { padding: 86px 0; background: linear-gradient(135deg, var(--navy), #103c58); color: rgba(255, 255, 255, .8); }
.quote-inner { display: grid; grid-template-columns: .9fr 1.1fr; align-items: start; gap: 64px; }
.quote-copy h2 { margin-bottom: 16px; color: var(--white); }
.quote-copy > p { max-width: 520px; }
.contact-list { margin: 30px 0 18px; }
.contact-detail { display: flex; align-items: center; gap: 14px; padding: 14px 0; border-top: 1px solid rgba(255, 255, 255, .14); }
.contact-detail > span {
  display: grid;
  place-items: center;
  flex: none;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 50%;
  color: #ffad7c;
  font-size: 15px;
}
.contact-detail small { display: block; color: rgba(255, 255, 255, .5); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; }
.contact-detail strong { display: block; margin-top: 2px; color: var(--white); font-size: 15.5px; font-weight: 700; }
.contact-detail a { color: var(--white); }
.contact-detail a:hover { color: #ffad7c; }
.small-note { margin: 0; color: rgba(255, 255, 255, .55); font-size: 12.5px; line-height: 1.6; }

.quote-form {
  padding: 34px 34px 30px;
  background: var(--white);
  border-radius: 4px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .25);
}
.form-title { margin: 0 0 22px; font-size: 21px; }
.quote-form label { display: block; margin-bottom: 16px; }
.quote-form label > span {
  display: block;
  margin-bottom: 7px;
  color: var(--navy);
  font-size: 12.5px;
  font-weight: 750;
  letter-spacing: .02em;
}
.quote-form input, .quote-form select, .quote-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #fbfcfd;
  color: var(--ink);
  font-family: inherit;
  font-size: 14.5px;
  line-height: 1.4;
  transition: border-color .18s ease, box-shadow .18s ease, background .18s ease;
}
.quote-form input:focus, .quote-form select:focus, .quote-form textarea:focus {
  outline: 0;
  border-color: var(--blue);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(12, 95, 145, .12);
}
.quote-form textarea { resize: vertical; min-height: 104px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.quote-form label.consent { display: flex; align-items: flex-start; gap: 10px; margin: 4px 0 20px; }
.quote-form label.consent input { width: 16px; height: 16px; margin-top: 3px; flex: none; accent-color: var(--orange); }
.quote-form label.consent > span { margin: 0; color: var(--muted); font-size: 12.5px; font-weight: 500; letter-spacing: 0; line-height: 1.55; }
.quote-form label.consent a { color: var(--blue); text-decoration: underline; }
.hp { position: absolute; left: -9999px; opacity: 0; pointer-events: none; }
.submit-btn { width: 100%; }
.form-status { margin: 14px 0 0; font-size: 13.5px; line-height: 1.55; }
.form-status:empty { display: none; }
.form-status.success { padding: 10px 12px; border-radius: 4px; background: #eaf6ef; color: #1c7a46; }
.form-status.error { padding: 10px 12px; border-radius: 4px; background: #fdf0e9; color: #a8441a; }
.form-status a { color: inherit; text-decoration: underline; font-weight: 700; }
.quote-form .small-note { margin-top: 14px; color: var(--muted); }
.quote-form .small-note a { color: var(--blue); }

/* ---------- footer ---------- */
.site-footer { padding-top: 72px; background: #04121e; color: rgba(255, 255, 255, .7); }
.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 56px;
}
.footer-brand .brand { margin-bottom: 18px; }
.footer-brand p { max-width: 330px; margin: 0; font-size: 13.5px; line-height: 1.65; color: rgba(255, 255, 255, .55); }
.footer-column h4 { margin-bottom: 16px; color: var(--white); font-size: 11px; letter-spacing: .14em; }
.footer-column a { display: block; margin-bottom: 9px; color: rgba(255, 255, 255, .62); font-size: 13.5px; }
.footer-column a:hover { color: var(--white); }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 0 26px;
  border-top: 1px solid rgba(255, 255, 255, .12);
  font-size: 12.5px;
}
.footer-bottom p { margin: 0; color: rgba(255, 255, 255, .45); }
.footer-bottom a { color: rgba(255, 255, 255, .62); }
.footer-bottom a:hover { color: var(--white); }

/* ---------- whatsapp float ---------- */
.wa-float {
  position: fixed;
  z-index: 70;
  right: 22px;
  bottom: 22px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 12px 18px 12px 14px;
  border-radius: 999px;
  background: #25d366;
  color: #05230f;
  font-size: 13.5px;
  font-weight: 800;
  box-shadow: 0 12px 30px rgba(0, 0, 0, .22);
  transition: transform .2s ease, box-shadow .2s ease;
}
.wa-float:hover { transform: translateY(-2px); box-shadow: 0 16px 36px rgba(0, 0, 0, .26); }
.wa-float svg { width: 22px; height: 22px; fill: currentColor; }

/* ---------- reveal (JS-only progressive enhancement) ---------- */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.in { opacity: 1; transform: none; }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1120px) {
  .nav ul { gap: 18px; }
  .nav-item > a { font-size: 13.5px; }
  .header-cta { display: none; }
  .application-grid { grid-template-columns: repeat(2, 1fr); }
  .range-list { columns: 1; }
}

@media (max-width: 940px) {
  :root { --header-h: 70px; }
  .menu-toggle { display: block; }
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    max-height: calc(100vh - var(--header-h));
    margin: 0;
    padding: 8px 20px 24px;
    overflow-y: auto;
    background: rgba(6, 22, 36, .99);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255, 255, 255, .12);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
  }
  .nav.open { opacity: 1; visibility: visible; transform: none; }
  .nav ul { flex-direction: column; gap: 0; }
  .nav-item { display: block; border-bottom: 1px solid rgba(255, 255, 255, .1); }
  .nav-item > a { padding: 15px 0; font-size: 15px; }
  .nav-item > a::after { display: none; }
  .nav-dropdown {
    position: static;
    min-width: 0;
    padding: 0 0 12px;
    background: transparent;
    border: 0;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
  }
  .nav-dropdown-heading { padding: 4px 0 6px; }
  .nav-dropdown a { padding: 7px 0 7px 12px; border-left: 1px solid rgba(255, 255, 255, .16); }

  .hero { min-height: 0; padding: 128px 0 210px; }
  .hero-stats { grid-template-columns: 1fr 1fr; padding-inline: 20px; }
  .hero-stats > div { min-height: 0; padding: 20px 20px 20px 0; }
  .hero-stats > div:nth-child(2) { border-right: 0; }
  .hero-stats > div:nth-child(1), .hero-stats > div:nth-child(2) { border-bottom: 1px solid rgba(255, 255, 255, .12); }
  .hero-stats strong { font-size: 24px; }

  .section { padding: 64px 0; }
  .section-heading { flex-direction: column; align-items: flex-start; gap: 18px; margin-bottom: 30px; }
  .section-heading > p { max-width: none; }

  .portfolio-row { grid-template-columns: 40px 150px minmax(0, 1fr); gap: 18px; padding: 18px 0; }
  .portfolio-row:hover { padding-left: 0; padding-right: 0; background: transparent; }
  .row-copy h3 { font-size: 19px; }
  .row-copy p { font-size: 14px; }
  .row-arrow { display: none; }

  .evidence-grid { grid-template-columns: 1fr; }
  .download-grid { grid-template-columns: repeat(3, 1fr); }
  .feature-inner, .split, .about-grid, .quote-inner { grid-template-columns: 1fr; gap: 38px; }
  .feature-media img { max-height: 420px; }
  .process-grid { grid-template-columns: 1fr 1fr; }
  .process-step { padding: 26px 22px 10px 0; }
  .process-step:nth-child(2) { border-right: 0; }
  .process-step:nth-child(1), .process-step:nth-child(2) { border-bottom: 1px solid var(--line); }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 34px; }
}

@media (max-width: 680px) {
  body { font-size: 16px; }
  .container { width: min(calc(100% - 32px), var(--max)); }
  .hero { padding: 116px 0 230px; }
  .hero-lead { font-size: 16.5px; }
  .hero-actions { gap: 10px; }
  .hero-actions .button { width: 100%; }
  .hero-stats > div { padding: 16px 14px 16px 0; }
  .hero-stats strong { font-size: 21px; }
  .hero-stats span { font-size: 11.5px; line-height: 1.45; }

  .portfolio-row { grid-template-columns: minmax(0, 1fr); gap: 12px; padding: 20px 0; }
  .row-media { grid-column: auto; aspect-ratio: 16 / 9; }
  .row-copy { grid-column: auto; }
  .row-number { align-self: center; }

  .application-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
  .app-body { padding: 16px 16px 20px; }
  .app-body h3 { font-size: 16px; }
  .app-body p { font-size: 12.5px; }
  .app-number { font-size: 11px; margin-bottom: 6px; }

  .process-grid { grid-template-columns: 1fr; }
  .process-step, .process-step + .process-step { padding: 22px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .process-step:last-child { border-bottom: 0; }

  .range-panel { padding: 24px 22px 20px; }
  .range-grid { grid-template-columns: 1fr; }
  .range-panel.wide .range-list { columns: 1; }

  .download-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
  .video-band { padding: 64px 0; }

  .quote-form { padding: 24px 20px 22px; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .about-facts { gap: 28px; }

  .footer-top { grid-template-columns: 1fr; gap: 28px; padding-bottom: 36px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 10px; }
  .wa-float span { display: none; }
  .wa-float { padding: 14px; right: 16px; bottom: 16px; }
  .faq-item p { padding-right: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

/* V6: category landing page discoverability and buyer conversion */
.category-deep-link{margin:-3px 0 22px;padding-left:clamp(8px,5vw,86px)}
.category-deep-link a{color:#d96d38;text-decoration:underline;text-underline-offset:4px;font-weight:650;font-size:14px}
.category-deep-link a:focus-visible,.detail-btn:focus-visible{outline:3px solid #ed8c53;outline-offset:4px}
.product-detail{background:#f5f7f8;color:#172c3d;min-height:100vh;font-family:system-ui,-apple-system,Segoe UI,Arial,sans-serif}
.detail-wrap{max-width:1080px;margin:0 auto;padding:32px 24px 72px}.detail-top{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.detail-top a{color:#12344d}.detail-kicker{color:#a55126;font-weight:700;letter-spacing:.08em;text-transform:uppercase;font-size:.78rem;margin-top:52px}.detail-title{font-size:clamp(30px,5vw,52px);line-height:1.12;margin:16px 0}.detail-intro{font-size:1.13rem;line-height:1.8;max-width:75ch}.detail-hero{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center}.detail-photo{width:100%;max-height:440px;object-fit:contain;background:white;border-radius:18px}.detail-panel{background:white;padding:28px;border-radius:16px;margin-top:35px;box-shadow:0 7px 24px #0a20300b}.detail-panel h2{font-size:1.5rem;margin:0 0 16px}.detail-panel p{line-height:1.8}.detail-btn{display:inline-block;padding:14px 24px;border-radius:6px;background:#cf632e;color:white!important;text-decoration:none;font-weight:700;margin-top:20px}.detail-footer{margin-top:35px;font-size:.92rem;color:#4d626f}.detail-related{display:flex;gap:8px;flex-wrap:wrap}.detail-related a{padding:9px 12px;border:1px solid #cdd8dd;border-radius:8px;color:#13425d;text-decoration:none}.detail-zh{color:#476071;margin-top:10px}.detail-list{line-height:2;padding-left:20px}@media(max-width:780px){.detail-hero{grid-template-columns:1fr}.detail-wrap{padding:22px 18px 56px}}