/* ============================================================
   ============================================================ */

:root {
  --navy: #0f2238;
  --navy-2: #16293f;
  --navy-3: #1e3550;

  --accent: #e8762b;
  --accent-hover: #d0601c;

  --bg-light: #f5f7fa;
  --bg-white: #ffffff;
  --border: #e2e8f0;
  --text-strong: #16232e;
  --text-body: #3d4c5c;
  --text-muted: #6b7a8a;

  --whatsapp: #25d366;

  --container: 1200px;
  --radius: 10px;
  --shadow-sm: 0 2px 10px rgba(15, 34, 56, 0.06);
  --shadow-md: 0 8px 30px rgba(15, 34, 56, 0.10);
  --shadow-lg: 0 16px 50px rgba(15, 34, 56, 0.16);

  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", -apple-system,
    BlinkMacSystemFont, Roboto, Arial, sans-serif;
}

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

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  color: var(--text-body);
  background: var(--bg-light);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

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

.topbar {
  background: #0b1a2b;
  color: #c7d3df;
  font-size: 13px;
  padding: 8px 0;
}

.topbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.topbar a {
  color: #c7d3df;
  transition: color 0.2s;
}

.topbar a:hover {
  color: #fff;
}

.topbar .tb-left,
.topbar .tb-right {
  display: flex;
  align-items: center;
  gap: 18px;
}

.topbar svg {
  vertical-align: -2px;
  margin-right: 5px;
}

.header {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: box-shadow 0.3s;
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

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

.logo img {
  height: 46px;
  width: auto;
}

.logo .logo-text {
  line-height: 1.1;
}

.logo .logo-text .brand {
  font-size: 22px;
  font-weight: 800;
  color: var(--navy);
  letter-spacing: 1px;
}

.logo .logo-text .brand span {
  color: var(--accent);
}

.logo .logo-text .sub {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav a {
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-body);
  border-radius: 6px;
  transition: all 0.2s;
  position: relative;
}

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

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

.nav a.active::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 4px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.nav-cta {
  margin-left: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.25s;
  line-height: 1;
}

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

.btn-accent:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(232, 118, 43, 0.35);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid #fff;
}

.btn-outline:hover {
  background: #fff;
  color: var(--navy);
}

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

.btn-navy:hover {
  background: var(--navy-3);
}

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

.btn-whatsapp:hover {
  background: #1fb457;
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(37, 211, 102, 0.35);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 6px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ============ Hero ============ */
.hero {
  position: relative;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-3) 100%);
  color: #fff;
  overflow: hidden;
}

.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding-top: 80px;
  padding-bottom: 80px;
}

.hero .badge {
  display: inline-block;
  background: rgba(232, 118, 43, 0.18);
  color: #ffc59a;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 22px;
}

.hero h1 {
  font-size: 46px;
  line-height: 1.15;
  font-weight: 800;
  margin-bottom: 22px;
}

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

.hero p {
  font-size: 18px;
  color: #c7d3df;
  max-width: 520px;
  margin-bottom: 34px;
}

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

.hero .hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
}

.hero .hero-stats .stat b {
  display: block;
  font-size: 30px;
  font-weight: 800;
  color: #fff;
}

.hero .hero-stats .stat span {
  font-size: 13px;
  color: #9db0c2;
}

.hero-img {
  position: relative;
}

.hero-img img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  width: 100%;
  height: auto;
  display: block;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(
      rgba(255, 255, 255, 0.04) 1px,
      transparent 1px
    ),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
}

.section {
  padding: 80px 0;
}

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

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 54px;
}

.section-head .kicker {
  display: inline-block;
  color: var(--accent);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-head h2 {
  font-size: 34px;
  font-weight: 800;
  color: var(--text-strong);
  line-height: 1.25;
  margin-bottom: 14px;
}

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

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: all 0.3s;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.feature-card .icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: rgba(232, 118, 43, 0.12);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

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

.series-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.3s;
  display: flex;
  flex-direction: column;
}

.series-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.series-card .thumb {
  position: relative;
  height: 220px;
  overflow: hidden;
  background: #eef2f6;
}

.series-card .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}

.series-card:hover .thumb img {
  transform: scale(1.05);
}

.series-card .tag {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--navy);
  color: #fff;
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
}

.series-card .body {
  padding: 26px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.series-card .body h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 8px;
}

.series-card .body .en {
  font-size: 13px;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 12px;
}

.series-card .body p {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 18px;
  flex: 1;
}

.series-card .body .models {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.series-card .body .models span {
  background: var(--bg-light);
  border: 1px solid var(--border);
  color: var(--text-body);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 4px;
}

.series-card .body .link {
  color: var(--accent);
  font-weight: 600;
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.series-card .body .link:hover {
  gap: 10px;
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.why-item {
  text-align: center;
  padding: 34px 20px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius);
  transition: background 0.3s;
}

.why-item:hover {
  background: rgba(255, 255, 255, 0.08);
}

.why-item .num {
  font-size: 40px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 12px;
}

.why-item .num small {
  font-size: 20px;
}

.why-item h4 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 6px;
}

.why-item p {
  color: #9db0c2;
  font-size: 13px;
}

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

.industry-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  transition: all 0.3s;
}

.industry-card:hover {
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.industry-card .ic-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: var(--navy);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.industry-card h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 6px;
}

.industry-card p {
  font-size: 13px;
  color: var(--text-muted);
}

.kc-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.kc-grid.kc-single {
  grid-template-columns: 1fr;
  max-width: 760px;
  margin: 0 auto;
}

.kc-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  transition: all 0.3s;
}
.kc-card:hover {
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.kc-card .kc-img {
  position: relative;
  width: 100%;
  height: 220px;
  background: #f0f4f8;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 12px;
}
.kc-card .kc-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}
.kc-card h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 6px;
}
.kc-card p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.55;
}

@media (max-width: 720px) {
  .kc-grid { grid-template-columns: 1fr; }
}

.cta-banner {
  background: linear-gradient(120deg, var(--accent) 0%, #f08b45 100%);
  border-radius: 16px;
  padding: 50px 50px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}

.cta-banner h3 {
  color: #fff;
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 8px;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 15px;
}

.cta-banner .btn {
  background: #fff;
  color: var(--accent);
}

.cta-banner .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.page-hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-3) 100%);
  color: #fff;
  padding: 70px 0;
  text-align: center;
}

.page-hero h1 {
  font-size: 40px;
  font-weight: 800;
  margin-bottom: 12px;
}

.page-hero p {
  color: #c7d3df;
  font-size: 17px;
  max-width: 640px;
  margin: 0 auto;
}

.breadcrumb {
  font-size: 14px;
  color: #9db0c2;
  margin-bottom: 16px;
}

.breadcrumb a {
  color: #c7d3df;
}

.breadcrumb a:hover {
  color: #fff;
}

.series-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.series-tab {
  padding: 12px 28px;
  border-radius: 30px;
  border: 1.5px solid var(--border);
  background: #fff;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-body);
  cursor: pointer;
  transition: all 0.25s;
}

.series-tab:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.series-tab.active {
  background: var(--navy);
  border-color: var(--navy);
  color: #fff;
}

.product-detail {
  background: var(--bg-white);
  border-radius: 16px;
  border: 1px solid var(--border);
  overflow: hidden;
  margin-bottom: 40px;
  box-shadow: var(--shadow-sm);
}

.product-detail .pd-head {
  padding: 28px 36px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.product-detail .pd-head .pd-series {
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 14px;
  letter-spacing: 1px;
}

.product-detail .pd-head h2 {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-strong);
}

.product-detail .pd-head .pd-desc {
  margin-left: auto;
  font-size: 14px;
  color: var(--text-muted);
}

.product-detail .pd-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.product-detail .pd-img {
  padding: 36px;
  background: #f0f4f8;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-detail .pd-img img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.product-detail .pd-info {
  padding: 36px;
}

.product-detail .pd-info h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.product-detail .pd-info h3::before {
  content: "";
  width: 4px;
  height: 18px;
  background: var(--accent);
  border-radius: 2px;
}

.product-detail .pd-info ul {
  margin-bottom: 20px;
}

.product-detail .pd-info ul li {
  padding: 7px 0;
  padding-left: 26px;
  position: relative;
  font-size: 14px;
  color: var(--text-body);
  border-bottom: 1px dashed var(--border);
}

.product-detail .pd-info ul li:last-child {
  border-bottom: none;
}

.product-detail .pd-info ul li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.spec-table-wrap {
  padding: 0 36px 36px;
  overflow-x: auto;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.spec-table th {
  background: var(--navy);
  color: #fff;
  padding: 14px 16px;
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
}

.spec-table th:first-child {
  background: var(--navy-3);
}

.spec-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-body);
}

.spec-table tr:nth-child(even) td {
  background: #f8fafc;
}

.spec-table td:first-child {
  font-weight: 600;
  color: var(--text-strong);
  background: #f0f4f8;
  white-space: nowrap;
}

.spec-table tr:hover td {
  background: #fef6f0;
}

.spec-table tr:hover td:first-child {
  background: #fdebe0;
}

.about-story {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.about-story .as-img img {
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.about-story h2 {
  font-size: 30px;
  font-weight: 800;
  color: var(--text-strong);
  margin-bottom: 20px;
}

.about-story p {
  font-size: 15px;
  color: var(--text-body);
  margin-bottom: 16px;
  line-height: 1.8;
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.cert-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
}

.cert-card .cc-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: rgba(232, 118, 43, 0.12);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.cert-card h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 6px;
}

.cert-card p {
  font-size: 13px;
  color: var(--text-muted);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.value-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 34px 28px;
  border: 1px solid var(--border);
  text-align: center;
}

.value-card h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-strong);
  margin: 16px 0 10px;
}

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

.market-banner {
  background: var(--bg-white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 40px;
}

.market-banner h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-strong);
  margin-bottom: 24px;
  text-align: center;
}

.market-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.market-list span {
  background: var(--bg-light);
  border: 1px solid var(--border);
  padding: 8px 18px;
  border-radius: 24px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-body);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
  align-items: start;
}

.contact-info-cards {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.contact-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  display: flex;
  gap: 18px;
  align-items: center;
  transition: all 0.3s;
}

.contact-card:hover {
  box-shadow: var(--shadow-md);
}

.contact-card .cc-icon {
  width: 54px;
  height: 54px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: #fff;
}

.contact-card .cc-icon.wa {
  background: var(--whatsapp);
}

.contact-card .cc-icon.mail {
  background: var(--accent);
}

.contact-card .cc-icon.pin {
  background: var(--navy);
}

.contact-card h4 {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 4px;
  font-weight: 500;
}

.contact-card a,
.contact-card b {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-strong);
  word-break: break-all;
}

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

.contact-form {
  background: var(--bg-white);
  border-radius: 16px;
  border: 1px solid var(--border);
  padding: 36px;
  box-shadow: var(--shadow-sm);
}

.contact-form h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-strong);
  margin-bottom: 6px;
}

.contact-form .cf-sub {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-strong);
  margin-bottom: 8px;
}

.form-group label em {
  color: var(--accent);
  font-style: normal;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
  color: var(--text-strong);
  background: #fbfcfe;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(232, 118, 43, 0.12);
  background: #fff;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.footer {
  background: #0b1a2b;
  color: #9db0c2;
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer .f-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.footer .f-brand img {
  width: auto;
  height: 42px;
  filter: brightness(0) invert(1);
  opacity: 0.9;
}

.footer .f-brand .brand {
  font-size: 20px;
  font-weight: 800;
  color: #fff;
}

.footer .f-brand .brand span {
  color: var(--accent);
}

.footer .f-about {
  font-size: 14px;
  line-height: 1.7;
  color: #7d91a5;
}

.footer h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 18px;
}

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

.footer ul li a {
  font-size: 14px;
  color: #9db0c2;
  transition: color 0.2s;
}

.footer ul li a:hover {
  color: var(--accent);
}

.footer .f-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
}

.footer .f-contact svg {
  flex-shrink: 0;
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 22px 0;
  text-align: center;
  font-size: 13px;
  color: #6b7f92;
}

.floating-widgets {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.float-btn {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: var(--shadow-lg);
  transition: all 0.3s;
  position: relative;
}

.float-btn:hover {
  transform: translateY(-4px);
}

.float-btn.wa {
  background: var(--whatsapp);
}

.float-btn.mail {
  background: var(--accent);
}

.float-btn.top {
  background: var(--navy);
  opacity: 0;
  pointer-events: none;
}

.float-btn.top.show {
  opacity: 1;
  pointer-events: auto;
}

.float-btn .tooltip {
  position: absolute;
  right: 64px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--navy);
  color: #fff;
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 13px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}

.float-btn:hover .tooltip {
  opacity: 1;
}

.float-btn.wa::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid var(--whatsapp);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  100% {
    transform: scale(1.6);
    opacity: 0;
  }
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s, transform 0.6s;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1024px) {
  .features-grid,
  .why-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .series-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .cert-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .topbar {
    display: none;
  }

  .header .container {
    height: 64px;
  }

  .nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px;
    gap: 4px;
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%);
    transition: transform 0.3s;
    z-index: 99;
  }

  .nav.open {
    transform: translateY(0);
  }

  .nav a {
    padding: 14px;
    border-bottom: 1px solid var(--border);
    border-radius: 0;
  }

  .nav a.active::after {
    display: none;
  }

  .nav-cta {
    margin: 12px 0 0;
  }

  .hamburger {
    display: flex;
  }

  .hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .hamburger.active span:nth-child(2) {
    opacity: 0;
  }

  .hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .hero .container {
    grid-template-columns: 1fr;
    padding-top: 48px;
    padding-bottom: 56px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero .hero-stats {
    gap: 24px;
    flex-wrap: wrap;
  }

  .section {
    padding: 56px 0;
  }

  .section-head h2 {
    font-size: 26px;
  }

  .features-grid,
  .why-grid,
  .series-grid,
  .industry-grid,
  .cert-grid,
  .values-grid {
    grid-template-columns: 1fr;
  }

  .cta-banner {
    padding: 32px 24px;
    text-align: center;
    justify-content: center;
  }

  .product-detail .pd-grid {
    grid-template-columns: 1fr;
  }

  .about-story {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-hero h1 {
    font-size: 30px;
  }

  .product-detail .pd-head {
    padding: 20px;
  }

  .product-detail .pd-img,
  .product-detail .pd-info {
    padding: 20px;
  }

  .spec-table-wrap {
    padding: 0 20px 20px;
  }

  .floating-widgets {
    right: 16px;
    bottom: 16px;
  }

  .float-btn {
    width: 48px;
    height: 48px;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== Consumables 选型指南页 ===== */
.steps {
  list-style: none;
  counter-reset: step;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.steps > li {
  counter-increment: step;
  position: relative;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  box-shadow: var(--shadow-sm);
}
.steps > li:last-child {
  grid-column: 1 / -1;
}
.steps > li::before {
  content: "Step " counter(step);
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}
.steps h3 {
  margin: 0 0 8px;
  font-size: 17px;
}
.steps p {
  margin: 0 0 8px;
  color: var(--text-body);
}
.steps .spec-table-wrap {
  padding: 8px 0 0;
  margin-top: 8px;
}
.note-text {
  font-size: 13.5px;
  color: var(--text-muted);
  border-left: 3px solid var(--accent);
  background: #fef6f0;
  padding: 12px 16px;
  border-radius: 0 6px 6px 0;
  margin: 16px 0 0;
}
@media (max-width: 768px) {
  .steps {
    grid-template-columns: 1fr;
  }
  .steps > li:last-child {
    grid-column: auto;
  }
}