:root {
  --ink: #0e1a2b;
  --ink-2: #14243b;
  --ink-3: #1d3352;
  --accent: #ff6a1a;
  --accent-soft: #ff8c4a;
  --accent-dark: #e2540f;
  --teal: #12b5a5;
  --paper: #ffffff;
  --bg: #f5f7fa;
  --line: #e3e8ef;
  --text: #1c2733;
  --muted: #5c6b7a;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 10px 30px rgba(14, 26, 43, 0.08);
  --shadow-lg: 0 24px 60px rgba(14, 26, 43, 0.16);
  --max: 1180px;
  --font-body: "Inter", "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-head: "Sora", "Inter", "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--paper);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  color: var(--ink);
  line-height: 1.22;
  font-weight: 700;
}

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, color 0.18s ease;
  font-family: var(--font-body);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 8px 22px rgba(255, 106, 26, 0.32);
}

.btn-primary:hover {
  background: var(--accent-soft);
  box-shadow: 0 12px 28px rgba(255, 106, 26, 0.4);
}

.btn-ghost {
  border-color: rgba(255, 255, 255, 0.55);
  color: #fff;
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
}

.btn-dark {
  background: var(--ink);
  color: #fff;
}

.btn-dark:hover {
  background: var(--ink-2);
}

.btn-light {
  background: #fff;
  color: var(--ink);
  box-shadow: var(--shadow);
}

.btn-light:hover {
  background: var(--bg);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.2s ease;
}

.site-header.scrolled {
  box-shadow: 0 6px 24px rgba(14, 26, 43, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  flex-shrink: 0;
}

.brand img,
.brand svg {
  width: 40px;
  height: 40px;
}

.brand-name .brand-title {
  display: block;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 19px;
  color: var(--ink);
  letter-spacing: 0.2px;
  line-height: 1.1;
}

.brand-name .brand-sub {
  display: block;
  font-family: var(--font-body);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 2.4px;
  color: var(--accent);
  text-transform: uppercase;
  line-height: 1.4;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.main-nav a {
  padding: 9px 14px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  transition: color 0.15s ease, background 0.15s ease;
}

.main-nav a:hover {
  color: var(--accent);
  background: rgba(255, 106, 26, 0.08);
}

.main-nav a.active {
  color: var(--accent);
  font-weight: 600;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-switch {
  display: inline-flex;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px;
}

.lang-switch button {
  border: 0;
  background: transparent;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  padding: 5px 11px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.lang-switch button.active {
  background: var(--ink);
  color: #fff;
}

.header-cta {
  display: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  cursor: pointer;
  color: var(--ink);
}

.nav-toggle svg {
  width: 26px;
  height: 26px;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background:
    radial-gradient(1100px 520px at 82% -10%, rgba(255, 106, 26, 0.28), transparent 60%),
    radial-gradient(900px 500px at 8% 110%, rgba(18, 181, 165, 0.18), transparent 55%),
    linear-gradient(135deg, #0b1524 0%, #12233c 55%, #0d1a2d 100%);
  color: #fff;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(760px 480px at 30% 20%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(760px 480px at 30% 20%, #000 0%, transparent 75%);
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
  padding: 96px 0 72px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  color: var(--accent-soft);
  background: rgba(255, 106, 26, 0.12);
  border: 1px solid rgba(255, 106, 26, 0.3);
  border-radius: 999px;
  padding: 7px 16px;
  margin-bottom: 22px;
}

.hero h1 {
  color: #fff;
  font-size: clamp(34px, 4.6vw, 54px);
  letter-spacing: -0.5px;
  margin-bottom: 20px;
}

.hero h1 .accent {
  color: var(--accent-soft);
}

.hero p.lead {
  color: #c9d5e4;
  font-size: 17px;
  max-width: 540px;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 44px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  max-width: 560px;
}

.hero-stats.stats-4 {
  max-width: none;
  grid-template-columns: repeat(4, 1fr);
}

/* ---------- Trust strip (hero bottom) ---------- */
.trust-strip {
  position: relative;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.03);
}

.trust-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  padding: 16px 0;
  font-size: 14px;
  color: #c9d5e4;
}

.trust-inner .badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 106, 26, 0.13);
  border: 1px solid rgba(255, 106, 26, 0.32);
  color: var(--accent-soft);
  font-weight: 700;
  padding: 7px 15px;
  border-radius: 999px;
}

.trust-inner .badge svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
}

/* ---------- Notice (products page) ---------- */
.notice {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: linear-gradient(135deg, rgba(18, 181, 165, 0.08), rgba(255, 106, 26, 0.08));
  border: 1px solid rgba(18, 181, 165, 0.3);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin-bottom: 38px;
}

.notice svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  margin-top: 2px;
  stroke: var(--teal);
}

.notice p {
  font-size: 14.5px;
  color: var(--text);
}

.notice strong {
  color: var(--ink);
}

.hero-stat {
  border-left: 2px solid rgba(255, 255, 255, 0.18);
  padding-left: 16px;
}

.hero-stat strong {
  display: block;
  font-family: var(--font-head);
  font-size: 28px;
  color: #fff;
  line-height: 1.1;
}

.hero-stat strong em {
  font-style: normal;
  color: var(--accent-soft);
}

.hero-stat span {
  font-size: 13px;
  color: #a9b9cd;
}

.hero-visual {
  position: relative;
}

.hero-visual .tool-ring {
  position: absolute;
  inset: 8% 6%;
  border: 1px dashed rgba(255, 255, 255, 0.16);
  border-radius: 50%;
  animation: spin 60s linear infinite;
}

.hero-visual .orb {
  position: absolute;
  width: 340px;
  height: 340px;
  right: -60px;
  top: -70px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 30%, rgba(255, 138, 74, 0.42), rgba(255, 106, 26, 0.12) 48%, transparent 72%);
  filter: blur(8px);
  z-index: 0;
}

.hero-visual .card {
  position: relative;
  z-index: 1;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 22px;
  padding: 26px;
  backdrop-filter: blur(8px);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.35);
}

.hero-visual .card-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: #93a7bf;
  margin-bottom: 14px;
}

.hero-visual svg.tool-svg {
  width: 100%;
  height: auto;
}

.hero-chip {
  position: absolute;
  z-index: 2;
  background: var(--ink);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 14px;
  padding: 12px 16px;
  font-size: 13px;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 9px;
}

.hero-chip .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 4px rgba(18, 181, 165, 0.2);
  animation: pulse 2.2s ease-in-out infinite;
}

.hero-chip.chip-1 {
  top: 12%;
  left: -12px;
  animation: float 5s ease-in-out infinite;
}

.hero-chip.chip-2 {
  bottom: 10%;
  right: -8px;
  animation: float 6s ease-in-out 1s infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ---------- Sections ---------- */
.section {
  padding: 88px 0;
}

.section-alt {
  background: var(--bg);
}

.section-dark {
  background: linear-gradient(160deg, #0e1a2b, #142c46);
  color: #d4deea;
}

.section-head {
  max-width: 720px;
  margin-bottom: 52px;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-head .eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-dark .section-head .eyebrow {
  color: var(--accent-soft);
}

.section-head h2 {
  font-size: clamp(26px, 3.2vw, 38px);
  margin-bottom: 14px;
  letter-spacing: -0.3px;
}

.section-dark .section-head h2 {
  color: #fff;
}

.section-head p {
  color: var(--muted);
  font-size: 16px;
}

.section-dark .section-head p {
  color: #a9bcd1;
}

/* ---------- Category cards (home) ---------- */
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.category-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  overflow: hidden;
}

.category-card::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--teal));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 106, 26, 0.35);
}

.category-card:hover::after {
  transform: scaleX(1);
}

.category-card .icon {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(255, 106, 26, 0.12), rgba(18, 181, 165, 0.12));
  margin-bottom: 18px;
}

.category-card .icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--accent);
}

.category-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.category-card p {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 14px;
}

.category-card .more {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.category-card .more svg {
  width: 15px;
  height: 15px;
  transition: transform 0.15s ease;
}

.category-card:hover .more svg {
  transform: translateX(3px);
}

/* ---------- Feature / value cards ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.feature-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  box-shadow: var(--shadow);
}

.feature-card .icon {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--ink);
  margin-bottom: 18px;
}

.feature-card .icon svg {
  width: 25px;
  height: 25px;
  stroke: var(--accent-soft);
}

.feature-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14.5px;
  color: var(--muted);
}

/* ---------- Split layout ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.split-media {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
  min-height: 320px;
  background: linear-gradient(145deg, #1d3352, #0e1a2b);
}

.split-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
}

.split-media .media-badge {
  position: absolute;
  left: 20px;
  bottom: 20px;
  background: rgba(14, 26, 43, 0.9);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 12px;
  padding: 12px 18px;
  font-size: 13px;
  font-weight: 600;
  backdrop-filter: blur(6px);
}

.checklist li {
  display: flex;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 15.5px;
}

.checklist svg {
  width: 21px;
  height: 21px;
  flex-shrink: 0;
  margin-top: 2px;
  stroke: var(--teal);
}

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

/* ---------- Process ---------- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: step;
}

.process-card {
  position: relative;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  padding: 30px 24px 24px;
  counter-increment: step;
}

.process-card .step-num {
  font-family: var(--font-head);
  font-size: 40px;
  font-weight: 800;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(255, 106, 26, 0.7);
  margin-bottom: 16px;
}

.process-card h3 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 8px;
}

.process-card p {
  font-size: 14px;
  color: #9fb2c7;
}

/* ---------- Certifications ---------- */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.cert-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 22px;
  text-align: center;
  box-shadow: var(--shadow);
}

.cert-card .badge {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--ink), var(--ink-3));
}

.cert-card .badge svg {
  width: 30px;
  height: 30px;
  stroke: var(--accent-soft);
}

.cert-card h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.cert-card p {
  font-size: 13.5px;
  color: var(--muted);
}

/* ---------- CTA banner ---------- */
.cta-banner {
  position: relative;
  border-radius: 24px;
  background: linear-gradient(120deg, #142c46, #1d3352);
  overflow: hidden;
  padding: 60px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  box-shadow: var(--shadow-lg);
}

.cta-banner::before {
  content: "";
  position: absolute;
  width: 380px;
  height: 380px;
  right: -120px;
  top: -160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 106, 26, 0.35), transparent 70%);
}

.cta-banner h2 {
  color: #fff;
  font-size: clamp(24px, 3vw, 32px);
  margin-bottom: 10px;
}

.cta-banner p {
  color: #b9c9dc;
  max-width: 560px;
}

.cta-banner .btn {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
}

/* ---------- Breadcrumb / page hero ---------- */
.page-hero {
  background:
    radial-gradient(900px 400px at 85% -20%, rgba(255, 106, 26, 0.24), transparent 60%),
    linear-gradient(135deg, #0b1524, #142a45);
  color: #fff;
  padding: 72px 0 64px;
  position: relative;
  overflow: hidden;
}

.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(600px 300px at 20% 0%, #000, transparent 75%);
  -webkit-mask-image: radial-gradient(600px 300px at 20% 0%, #000, transparent 75%);
}

.page-hero .container {
  position: relative;
  z-index: 1;
}

.page-hero h1 {
  color: #fff;
  font-size: clamp(30px, 4vw, 44px);
  margin-bottom: 12px;
}

.page-hero p {
  color: #b9c9dc;
  max-width: 640px;
  font-size: 16.5px;
}

.breadcrumb {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 13px;
  font-weight: 600;
  color: #8fa2b8;
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.breadcrumb a {
  color: var(--accent-soft);
}

.breadcrumb svg {
  width: 13px;
  height: 13px;
}

/* ---------- Category navigation (products page) ---------- */
.cat-nav {
  position: sticky;
  top: 76px;
  z-index: 40;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  padding: 12px 0;
}

.cat-nav .cat-scroll {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 2px;
}

.cat-nav .cat-scroll::-webkit-scrollbar {
  display: none;
}

.cat-nav a {
  flex-shrink: 0;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 17px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  transition: all 0.15s ease;
}

.cat-nav a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.cat-nav a.active {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}

/* ---------- Product category sections ---------- */
.cat-section {
  padding: 58px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 148px;
}

.cat-section:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.cat-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.cat-head .cat-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.cat-head h2 {
  font-size: clamp(23px, 2.8vw, 30px);
}

.cat-head .cat-desc {
  color: var(--muted);
  max-width: 540px;
  font-size: 15px;
}

.series-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 28px;
}

.series-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.series-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 106, 26, 0.35);
}

.series-card .mats {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.3px;
  color: var(--accent);
}

.series-card .series-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #eef2f7;
}

.series-card h3 {
  font-size: 16.5px;
  line-height: 1.3;
}

.series-card p {
  font-size: 14px;
  color: var(--muted);
  flex: 1;
}

.series-card ul {
  font-size: 13.5px;
  color: var(--text);
}

.series-card ul li {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  margin-bottom: 5px;
}

.series-card ul li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--teal);
  margin-top: 7px;
  flex-shrink: 0;
}

.series-card .more {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: 4px;
}

.series-card .more svg {
  width: 15px;
  height: 15px;
  transition: transform 0.15s ease;
}

.series-card:hover .more svg {
  transform: translateX(3px);
}

/* ---------- Products page ---------- */
.product-cat {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 48px;
  align-items: start;
  padding: 56px 0;
  border-top: 1px solid var(--line);
}

.product-cat:first-of-type {
  border-top: 0;
}

.product-cat:nth-child(even) {
  grid-template-columns: 1fr 320px;
}

.product-cat:nth-child(even) .cat-visual {
  order: 2;
}

.cat-visual {
  border-radius: var(--radius);
  background: linear-gradient(145deg, #f0f4f9, #e6edf5);
  border: 1px solid var(--line);
  min-height: 230px;
  display: grid;
  place-items: center;
  padding: 28px;
}

.cat-visual svg {
  width: 100%;
  max-width: 240px;
  height: auto;
}

.cat-content h2 {
  font-size: 26px;
  margin-bottom: 6px;
}

.cat-content .cat-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.cat-content > p {
  color: var(--muted);
  margin-bottom: 18px;
}

.spec-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 28px;
  margin-bottom: 20px;
}

.spec-list li {
  font-size: 14.5px;
  color: var(--text);
  display: flex;
  gap: 9px;
  align-items: flex-start;
}

.spec-list li::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
  margin-top: 8px;
  flex-shrink: 0;
}

.spec-list li strong {
  font-weight: 600;
}

/* ---------- Comparison table ---------- */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  min-width: 720px;
}

.data-table th,
.data-table td {
  padding: 15px 18px;
  text-align: left;
  font-size: 14.5px;
  border-bottom: 1px solid var(--line);
}

.data-table thead th {
  background: var(--ink);
  color: #fff;
  font-weight: 600;
  font-size: 13.5px;
  letter-spacing: 0.4px;
}

.data-table tbody tr:last-child td {
  border-bottom: 0;
}

.data-table tbody tr:hover {
  background: #f8fafc;
}

.data-table .check {
  color: var(--teal);
  font-weight: 700;
}

/* ---------- About ---------- */
.timeline {
  position: relative;
  margin-top: 12px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(var(--accent), var(--teal));
}

.timeline li {
  position: relative;
  padding: 0 0 34px 40px;
}

.timeline li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  border: 4px solid var(--accent);
  box-shadow: 0 0 0 4px rgba(255, 106, 26, 0.14);
}

.timeline .year {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  color: var(--accent);
}

.timeline h3 {
  font-size: 16px;
  margin: 3px 0 6px;
}

.timeline p {
  color: var(--muted);
  font-size: 14.5px;
  max-width: 520px;
}

.value-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.value-item {
  display: flex;
  gap: 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.value-item .icon {
  flex-shrink: 0;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: rgba(255, 106, 26, 0.1);
  display: grid;
  place-items: center;
}

.value-item .icon svg {
  width: 23px;
  height: 23px;
  stroke: var(--accent);
}

.value-item h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.value-item p {
  font-size: 14px;
  color: var(--muted);
}

/* ---------- Quality ---------- */
.quality-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.quality-step {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  box-shadow: var(--shadow);
  position: relative;
}

.quality-step .num {
  font-family: var(--font-head);
  font-size: 34px;
  font-weight: 800;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--teal);
  margin-bottom: 12px;
}

.quality-step h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.quality-step p {
  font-size: 14.5px;
  color: var(--muted);
}

.equipment-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.equipment-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.equipment-card h3 {
  font-size: 16px;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.equipment-card h3 svg {
  width: 22px;
  height: 22px;
  stroke: var(--accent);
}

.equipment-card p {
  font-size: 14px;
  color: var(--muted);
}

.guarantee-box {
  background: linear-gradient(135deg, rgba(18, 181, 165, 0.08), rgba(255, 106, 26, 0.08));
  border: 1px solid rgba(18, 181, 165, 0.3);
  border-radius: var(--radius);
  padding: 28px 30px;
}

.guarantee-box h3 {
  margin-bottom: 10px;
}

.guarantee-box p {
  color: var(--muted);
  font-size: 15px;
  margin-bottom: 16px;
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: start;
}

.contact-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
}

.contact-card + .contact-card {
  margin-top: 20px;
}

.contact-card h3 {
  font-size: 18px;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.contact-card h3 svg {
  width: 22px;
  height: 22px;
  stroke: var(--accent);
}

.contact-list li {
  display: flex;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 15px;
}

.contact-list li:last-child {
  border-bottom: 0;
}

.contact-list .label {
  color: var(--muted);
  min-width: 78px;
  flex-shrink: 0;
}

.contact-list a:hover {
  color: var(--accent);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.form-group.full {
  grid-column: 1 / -1;
}

.form-group label {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

.form-group label .req {
  color: var(--accent);
}

.form-group input,
.form-group select,
.form-group textarea {
  font-family: var(--font-body);
  font-size: 15px;
  padding: 12px 15px;
  border: 1.5px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fbfcfe;
  color: var(--text);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  width: 100%;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(255, 106, 26, 0.12);
  background: #fff;
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-note {
  font-size: 13px;
  color: var(--muted);
  margin-top: 4px;
}

.form-error {
  font-size: 13px;
  color: #d32f2f;
  display: none;
}

.form-group.invalid input,
.form-group.invalid textarea {
  border-color: #d32f2f;
}

.form-group.invalid .form-error {
  display: block;
}

.form-success {
  display: none;
  background: rgba(18, 181, 165, 0.1);
  border: 1px solid rgba(18, 181, 165, 0.35);
  color: #0b7f74;
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 14.5px;
  font-weight: 600;
  margin-bottom: 18px;
}

.form-success.show {
  display: block;
}

/* ---------- Footer ---------- */
.site-footer {
  background: #0a131f;
  color: #93a6ba;
  padding: 64px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 28px;
}

.footer-brand .brand-name .brand-title {
  color: #fff;
}

.footer-brand .brand-name .brand-sub {
  color: var(--accent-soft);
}

.footer-brand p {
  font-size: 14px;
  margin-top: 16px;
  max-width: 300px;
}

.footer-col h4 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 18px;
  letter-spacing: 0.4px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col a {
  font-size: 14px;
  transition: color 0.15s ease;
}

.footer-col a:hover {
  color: var(--accent-soft);
}

.footer-contact li {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 14px;
}

.footer-contact svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 2px;
  stroke: var(--accent-soft);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
}

/* ---------- Back to top ---------- */
.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  border: 0;
  display: grid;
  place-items: center;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(255, 106, 26, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.2s ease;
  z-index: 50;
}

.back-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-top svg {
  width: 20px;
  height: 20px;
}

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .hero-visual .tool-ring,
  .hero-chip,
  .hero-chip .dot {
    animation: none;
  }
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .cert-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-inner {
    grid-template-columns: 1fr;
    padding: 72px 0 56px;
  }
  .hero-visual {
    max-width: 560px;
  }
  .hero-visual .orb {
    right: 0;
  }
  .split {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .product-cat,
  .product-cat:nth-child(even) {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .product-cat:nth-child(even) .cat-visual {
    order: 0;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .series-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: grid;
    place-items: center;
  }
  .main-nav {
    position: fixed;
    inset: 76px 0 auto 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    gap: 4px;
    box-shadow: 0 20px 40px rgba(14, 26, 43, 0.14);
    border-bottom: 1px solid var(--line);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
  }
  .main-nav.open {
    transform: none;
    opacity: 1;
    visibility: visible;
  }
  .main-nav a {
    padding: 12px 14px;
    font-size: 16px;
  }
  .header-cta {
    display: none;
  }
  .header-inner {
    height: 72px;
  }
  .cta-banner {
    flex-direction: column;
    align-items: flex-start;
    padding: 42px 32px;
  }
  .quality-steps,
  .equipment-grid {
    grid-template-columns: 1fr;
  }
  .cat-nav {
    top: 72px;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 64px 0;
  }
  .category-grid,
  .feature-grid,
  .cert-grid,
  .process-grid,
  .value-list {
    grid-template-columns: 1fr;
  }
  .hero-stats {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 12px;
  }
  .hero-stats.stats-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-stat strong {
    font-size: 22px;
  }
  .hero-stat span {
    font-size: 12px;
  }
  .hero-chip.chip-1 {
    left: 0;
  }
  .hero-chip.chip-2 {
    right: 0;
  }
  .spec-list {
    grid-template-columns: 1fr;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .series-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    justify-content: center;
    text-align: center;
  }
  .lang-switch button {
    padding: 5px 9px;
  }
}