:root {
  --green: #00a87e;
  --green-deep: #007a5c;
  --green-soft: #e7f7f2;
  --yellow: #f5c518;
  --ink: #101816;
  --ink-2: #3a4743;
  --muted: #6b7874;
  --line: #e4ece9;
  --bg: #f4f7f6;
  --white: #ffffff;
  --dark: #07130f;
  --dark-2: #0d1f19;
  --header-h: 72px;
  --wrap: 1160px;
  --radius: 18px;
  --shadow: 0 18px 50px rgba(16, 24, 22, 0.08);
  --font: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

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

button {
  font-family: inherit;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid transparent;
  transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 8px 30px rgba(16, 24, 22, 0.06);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand img {
  height: 34px;
  width: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.site-nav a {
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 14px;
  color: var(--ink-2);
  transition: background 0.2s ease, color 0.2s ease;
}

.site-nav a:hover,
.site-nav a.is-current {
  background: var(--green-soft);
  color: var(--green-deep);
}

.header-tel {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.header-tel:hover {
  background: var(--green-deep);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  position: relative;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle span::before {
  top: -6px;
}

.nav-toggle span::after {
  top: 6px;
}

.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: grid;
  align-items: end;
  overflow: hidden;
  background: var(--dark);
  color: #fff;
}

.hero-media {
  position: absolute;
  inset: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.05);
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(7, 19, 15, 0.18) 0%, rgba(7, 19, 15, 0.55) 46%, rgba(7, 19, 15, 0.92) 100%),
    radial-gradient(80% 60% at 80% 10%, rgba(0, 168, 126, 0.28), transparent 60%);
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 72px 0 80px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--yellow);
  margin-bottom: 18px;
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--yellow);
}

.hero h1 {
  margin: 0 0 18px;
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1.12;
  letter-spacing: 0.02em;
  font-weight: 650;
}

.hero h1 em {
  font-style: normal;
  color: var(--green);
}

.hero-lead {
  max-width: 620px;
  margin: 0 0 32px;
  font-size: 17px;
  color: rgba(255, 255, 255, 0.82);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 48px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

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

.btn-primary:hover {
  background: var(--green-deep);
}

.btn-ghost {
  border-color: rgba(255, 255, 255, 0.28);
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

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

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

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.hero-stats b {
  display: block;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.hero-stats span {
  color: rgba(255, 255, 255, 0.64);
  font-size: 13px;
}

.section {
  padding: 88px 0;
}

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

.section-dark {
  background: var(--dark-2);
  color: #fff;
}

.section-head {
  max-width: 640px;
  margin-bottom: 40px;
}

.kicker {
  color: var(--green-deep);
  font-size: 13px;
  letter-spacing: 0.16em;
  font-weight: 650;
  margin-bottom: 10px;
}

.section-dark .kicker {
  color: var(--yellow);
}

h2 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.2;
  letter-spacing: 0.01em;
}

.lede {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.section-dark .lede {
  color: rgba(255, 255, 255, 0.68);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.product-card {
  background: var(--white);
  border-radius: calc(var(--radius) + 4px);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  min-height: 100%;
  border: 1px solid rgba(16, 24, 22, 0.04);
}

.product-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.product-card:hover img {
  transform: scale(1.04);
}

.product-body {
  padding: 24px 24px 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.product-body h3 {
  margin: 0;
  font-size: 22px;
}

.tag {
  display: inline-flex;
  width: fit-content;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--green-soft);
  color: var(--green-deep);
  font-size: 12px;
  font-weight: 650;
}

.product-body p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.product-body ul {
  margin: 6px 0 12px;
  padding: 0;
  list-style: none;
  color: var(--ink-2);
  font-size: 14px;
}

.product-body li {
  padding: 5px 0 5px 16px;
  position: relative;
}

.product-body li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  position: absolute;
  left: 0;
  top: 12px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature {
  padding: 26px;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--line);
}

.section-dark .feature {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.08);
}

.feature-num {
  font-size: 13px;
  color: var(--green);
  font-weight: 700;
  letter-spacing: 0.12em;
  margin-bottom: 14px;
}

.feature h3 {
  margin: 0 0 8px;
  font-size: 20px;
}

.feature p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.section-dark .feature p {
  color: rgba(255, 255, 255, 0.68);
}

.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 28px;
  align-items: stretch;
}

.panel {
  border-radius: calc(var(--radius) + 6px);
  padding: 32px;
  background: var(--white);
  border: 1px solid var(--line);
}

.panel-green {
  background: linear-gradient(180deg, #0f2a22, #0a1c17);
  color: #fff;
  border: 0;
}

.panel h3 {
  margin: 0 0 8px;
  font-size: 26px;
}

.panel p {
  margin: 0 0 22px;
  color: var(--muted);
}

.panel-green p {
  color: rgba(255, 255, 255, 0.72);
}

.qr-row {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.qr-item {
  text-align: center;
  width: 120px;
}

.qr-item img {
  width: 108px;
  height: 108px;
  object-fit: contain;
  background: #fff;
  border-radius: 16px;
  padding: 8px;
  margin: 0 auto 8px;
}

.qr-item span {
  font-size: 12px;
  color: var(--ink-2);
}

.panel-green .qr-item span {
  color: rgba(255, 255, 255, 0.78);
}

.highlight {
  color: var(--yellow);
  font-weight: 650;
}

.clients {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.client {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 14px;
  height: 88px;
  display: grid;
  place-items: center;
  padding: 10px 16px;
}

.client img {
  max-height: 48px;
  width: auto;
  filter: grayscale(1);
  opacity: 0.78;
  transition: filter 0.2s ease, opacity 0.2s ease;
}

.client:hover img {
  filter: none;
  opacity: 1;
}

.cta-band {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 36px 40px;
  border-radius: 28px;
  background:
    radial-gradient(70% 120% at 100% 0%, rgba(245, 197, 24, 0.16), transparent 50%),
    linear-gradient(135deg, #0c241d, #0f3a2e);
  color: #fff;
}

.cta-band h2 {
  margin-bottom: 6px;
}

.cta-band p {
  margin: 0;
  color: rgba(255, 255, 255, 0.7);
}

.page-hero {
  position: relative;
  min-height: 360px;
  display: grid;
  align-items: end;
  overflow: hidden;
  background: var(--dark);
  color: #fff;
}

.page-hero .hero-content {
  padding: 64px 0 48px;
}

.page-hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  margin: 0 0 12px;
}

.page-hero p {
  margin: 0;
  max-width: 640px;
  color: rgba(255, 255, 255, 0.8);
}

.gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.gallery-full {
  grid-column: 1 / -1;
}

.shot {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  min-height: 240px;
}

.shot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 240px;
}

.shot figcaption {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 16px;
  padding: 10px 14px;
  border-radius: 12px;
  background: rgba(7, 19, 15, 0.72);
  color: #fff;
  font-size: 14px;
  backdrop-filter: blur(8px);
}

.figure-plain {
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
}

.figure-plain img {
  width: 100%;
}

.table-wrap {
  overflow-x: auto;
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

table.data {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
  font-size: 14px;
}

table.data th,
table.data td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

table.data th {
  background: #f0f6f3;
  font-weight: 650;
  color: var(--ink);
}

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

table.data .sum td {
  background: #fff8d9;
  font-weight: 700;
}

table.data .own td {
  background: #eefaf5;
}

table.data .note td {
  background: #fff4f2;
}

.param-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.param {
  padding: 16px 18px;
  border-radius: 14px;
  background: #fff;
  border: 1px solid var(--line);
}

.param b {
  display: block;
  font-size: 13px;
  color: var(--muted);
  font-weight: 500;
  margin-bottom: 4px;
}

.list-cards {
  display: grid;
  gap: 10px;
}

.list-cards div {
  padding: 14px 16px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--line);
}

.list-cards div:nth-child(odd) {
  background: var(--green-soft);
  border-color: transparent;
}

.steps {
  display: grid;
  gap: 12px;
}

.step {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  background: #fff;
  border-radius: 14px;
  border: 1px solid var(--line);
}

.step b {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: #fff;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.case-card {
  border-radius: calc(var(--radius) + 2px);
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.case-card img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.case-card .body {
  padding: 18px 20px 20px;
}

.case-card h3 {
  margin: 0 0 6px;
  font-size: 18px;
}

.case-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.region-title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 8px 0 20px;
}

.region-title::after {
  content: "";
  height: 1px;
  flex: 1;
  background: var(--line);
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 22px;
}

.info-list {
  display: grid;
  gap: 14px;
}

.info-list div {
  padding: 18px 20px;
  border-radius: 16px;
  background: #fff;
  border: 1px solid var(--line);
}

.info-list b {
  display: block;
  font-size: 13px;
  color: var(--muted);
  font-weight: 500;
  margin-bottom: 4px;
}

.about p {
  color: var(--ink-2);
  margin: 0 0 16px;
}

.flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 10px;
  align-items: center;
}

.flow-box {
  background: #fff;
  border-radius: 14px;
  padding: 16px;
  border: 1px solid var(--line);
  text-align: center;
  font-size: 14px;
}

.flow-box strong {
  display: block;
  color: var(--green-deep);
  margin-bottom: 4px;
}

.flow img {
  width: 36px;
  opacity: 0.7;
}

.callout {
  margin-top: 18px;
  padding: 18px 20px;
  border-radius: 16px;
  background: var(--ink);
  color: #fff;
  text-align: center;
}

.certs img {
  width: 100%;
  border-radius: var(--radius);
}

.site-footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.72);
  padding: 42px 0 28px;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-footer h3 {
  margin: 0 0 10px;
  color: #fff;
  font-size: 18px;
}

.site-footer p,
.site-footer a {
  margin: 0 0 6px;
  font-size: 14px;
}

.site-footer a:hover {
  color: var(--green);
}

.footer-tel {
  font-size: 28px;
  color: var(--green);
  font-weight: 700;
}

.beian {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding-top: 16px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.45);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.in-view {
  opacity: 1;
  transform: none;
}

.call-fab {
  display: none;
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 40;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: var(--green);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  place-items: center;
  box-shadow: 0 12px 30px rgba(0, 168, 126, 0.35);
}

.err-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: var(--bg);
  text-align: center;
  padding: 40px 20px;
}

.err-card {
  background: #fff;
  border-radius: 24px;
  padding: 48px 32px;
  max-width: 460px;
  box-shadow: var(--shadow);
}

.err-card img {
  height: 36px;
  margin: 0 auto 24px;
}

.err-card h1 {
  margin: 0 0 8px;
  font-size: 28px;
}

@media (max-width: 980px) {
  .nav-toggle {
    display: grid;
    place-items: center;
    margin-left: auto;
  }

  .site-nav {
    position: fixed;
    inset: var(--header-h) 16px auto;
    display: none;
    flex-direction: column;
    align-items: stretch;
    background: #fff;
    padding: 12px;
    border-radius: 16px;
    box-shadow: var(--shadow);
    border: 1px solid var(--line);
  }

  .nav-open .site-nav {
    display: flex;
  }

  .header-tel {
    display: none;
  }

  .hero-stats,
  .product-grid,
  .feature-grid,
  .split,
  .clients,
  .gallery,
  .case-grid,
  .contact-grid,
  .param-grid {
    grid-template-columns: 1fr;
  }

  .clients {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cta-band,
  .footer-grid,
  .beian {
    flex-direction: column;
  }

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

  .flow img {
    transform: rotate(90deg);
    margin: 0 auto;
  }

  .hero,
  .page-hero {
    min-height: 0;
  }

  .call-fab {
    display: grid;
  }
}

@media (max-width: 640px) {
  .wrap {
    width: min(calc(100% - 28px), var(--wrap));
  }

  .section {
    padding: 64px 0;
  }

  .hero-content,
  .page-hero .hero-content {
    padding-top: 48px;
    padding-bottom: 40px;
  }

  .panel,
  .cta-band {
    padding: 24px;
  }
}