:root {
  --ink: #13201f;
  --muted: #66706e;
  --line: #d9dfdc;
  --paper: #fffdf8;
  --mist: #f2f3ed;
  --deep: #102421;
  --deep-2: #183733;
  --blue: #0a7f8f;
  --blue-2: #4bb6a8;
  --green: #5d7f45;
  --gold: #b58a3a;
  --clay: #8b5d3f;
  --shadow: 0 20px 48px rgba(16, 36, 33, .16);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

@keyframes heroRise {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes sheen {
  from { transform: translateX(-120%) skewX(-18deg); }
  to { transform: translateX(220%) skewX(-18deg); }
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 999;
  background: var(--deep);
  color: #fff;
  padding: 10px 14px;
}

.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 253, 248, .94);
  border-bottom: 1px solid rgba(217, 223, 220, .9);
  backdrop-filter: blur(16px);
}

.nav {
  max-width: 1240px;
  height: 72px;
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 26px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 192px;
}

.brand:hover .brand-mark {
  transform: translateY(-2px) rotate(-3deg);
  box-shadow: 0 12px 24px rgba(16, 36, 33, .18);
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--deep), var(--blue-2) 58%, var(--gold));
  border-radius: 8px;
  font-weight: 700;
  transition: transform .28s ease, box-shadow .28s ease;
}

.brand strong {
  display: block;
  font-size: 18px;
  line-height: 1.1;
}

.brand span {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.nav-links a {
  color: #344155;
  font-size: 14px;
  font-weight: 600;
  position: relative;
  transition: color .22s ease;
}

.nav-links a[aria-current="page"], .nav-links a:hover { color: var(--green); }

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -8px;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), var(--blue-2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .26s ease;
}

.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after {
  transform: scaleX(1);
}

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

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 6px;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--ink);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform .22s ease, box-shadow .22s ease, background-color .22s ease, border-color .22s ease;
}

.button::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 -40%;
  width: 36%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.38), transparent);
  transform: translateX(-120%) skewX(-18deg);
  pointer-events: none;
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(16, 36, 33, .16);
}

.button:hover::before {
  animation: sheen .75s ease;
}

.button.primary { background: var(--green); color: #fff; }
.button.primary:hover { background: #496a35; }
.button.light { background: #fffdf8; color: var(--deep); box-shadow: 0 12px 30px rgba(0,0,0,.16); }
.button.ghost { border-color: rgba(255, 255, 255, .42); color: #fff; }
.button.outline { border-color: var(--line); color: var(--deep); background: #fffdf8; }

.hero {
  min-height: calc(100vh - 72px);
  display: flex;
  align-items: center;
  position: relative;
  color: #fff;
  background:
    radial-gradient(circle at 72% 24%, rgba(75, 182, 168, .28), transparent 30%),
    linear-gradient(90deg, rgba(16, 36, 33, .94), rgba(16, 36, 33, .68) 50%, rgba(16, 36, 33, .22)),
    url("images/hero-industrial-water.jpg") center/cover no-repeat;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 120px;
  background: linear-gradient(0deg, rgba(242, 243, 237, 1), rgba(242, 243, 237, 0));
}

.hero-inner {
  width: min(1240px, calc(100% - 56px));
  margin: 0 auto;
  padding: 92px 0 128px;
  position: relative;
  z-index: 1;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #bdebe3;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 38px;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), var(--blue-2));
}

.hero h1 {
  max-width: 850px;
  margin: 22px 0 20px;
  font-size: clamp(42px, 7vw, 82px);
  line-height: 1.02;
  letter-spacing: 0;
}

.hero .eyebrow,
.hero h1,
.hero p,
.hero-actions,
.hero-metrics {
  animation: heroRise .72s ease both;
}

.hero h1 { animation-delay: .08s; }
.hero p { animation-delay: .16s; }
.hero-actions { animation-delay: .24s; }
.hero-metrics { animation-delay: .32s; }

.hero p {
  max-width: 710px;
  margin: 0 0 34px;
  color: rgba(255, 255, 255, .86);
  font-size: 19px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 60px;
}

.hero-metrics {
  width: min(880px, 100%);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid rgba(255, 255, 255, .22);
  border-left: 1px solid rgba(255, 255, 255, .18);
}

.metric {
  min-height: 106px;
  padding: 20px;
  border-right: 1px solid rgba(255, 255, 255, .22);
  border-bottom: 1px solid rgba(255, 255, 255, .22);
  background: linear-gradient(145deg, rgba(255, 253, 248, .12), rgba(75, 182, 168, .08));
  transition: transform .28s ease, background .28s ease, border-color .28s ease;
}

.metric:hover {
  transform: translateY(-4px);
  background: linear-gradient(145deg, rgba(255, 253, 248, .18), rgba(75, 182, 168, .16));
  border-color: rgba(255, 255, 255, .34);
}

.metric strong {
  display: block;
  font-size: 28px;
  line-height: 1.2;
}

.metric span {
  display: block;
  margin-top: 6px;
  color: rgba(255, 255, 255, .74);
  font-size: 13px;
}

.section {
  padding: 92px 28px;
}

.section.mist { background: linear-gradient(180deg, var(--mist), #ebece4); }
.section.deep { background: linear-gradient(135deg, var(--deep), var(--deep-2)); color: #fff; }

.container {
  width: min(1240px, 100%);
  margin: 0 auto;
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 460px) minmax(0, 1fr);
  gap: 56px;
  align-items: end;
  margin-bottom: 42px;
}

.section-kicker {
  color: var(--green);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.deep .section-kicker { color: #8ee1d6; }

h1, h2, h3, p { overflow-wrap: anywhere; }

h2 {
  margin: 8px 0 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.15;
  letter-spacing: 0;
}

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

.deep .section-head p { color: rgba(255, 255, 255, .72); }

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

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.panel, .product-card, .case-card, .faq-item {
  background: #fffdf8;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.panel {
  padding: 30px;
  min-height: 100%;
  transition: transform .28s ease, box-shadow .28s ease, border-color .28s ease;
}

.panel:hover {
  transform: translateY(-6px);
  border-color: rgba(93, 127, 69, .42);
  box-shadow: var(--shadow);
}

.panel h3, .product-card h3, .case-card h3 {
  margin: 0 0 10px;
  font-size: 21px;
  line-height: 1.28;
}

.panel p, .product-card p, .case-card p {
  margin: 0;
  color: var(--muted);
}

.panel .tag, .product-tag, .case-tag {
  display: inline-flex;
  margin-bottom: 18px;
  padding: 5px 10px;
  border-radius: 999px;
  background: #e4eee6;
  color: var(--green);
  font-size: 12px;
  font-weight: 700;
}

.application-card {
  min-height: 240px;
  display: flex;
  align-items: flex-end;
  padding: 24px;
  color: #fff;
  background: linear-gradient(180deg, rgba(16, 36, 33, .05), rgba(16, 36, 33, .82)), var(--image) center/cover no-repeat;
  border-radius: 8px;
  overflow: hidden;
  transition: transform .32s ease, box-shadow .32s ease, filter .32s ease;
}

.application-card.with-image {
  min-height: 100%;
  display: block;
  padding: 0;
  color: var(--ink);
  background: #fffdf8;
  border: 1px solid var(--line);
}

.application-card.with-image .application-image {
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f3f2eb;
  border-bottom: 1px solid var(--line);
}

.application-card.with-image .application-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 10px;
  transition: transform .34s ease, filter .34s ease;
}

.application-card.with-image .application-body {
  padding: 22px;
}

.application-card.with-image p {
  color: var(--muted);
}

.application-card:hover {
  transform: translateY(-7px);
  box-shadow: var(--shadow);
  filter: saturate(1.08) contrast(1.03);
}

.application-card.with-image:hover .application-image img {
  transform: scale(1.03);
  filter: saturate(1.08);
}

.application-card h3 { margin: 0 0 8px; font-size: 22px; }
.application-card p { margin: 0; color: rgba(255, 255, 255, .82); }

.product-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}

.product-card:hover {
  transform: translateY(-7px);
  border-color: rgba(93, 127, 69, .45);
  box-shadow: var(--shadow);
}

.product-media {
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
  background-color: #f3f2eb;
  background-image:
    linear-gradient(180deg, rgba(16, 36, 33, .02), rgba(16, 36, 33, .08)),
    url("images/ro-system-product.jpg");
  background-position: center;
  background-size: contain;
  background-repeat: no-repeat;
  color: transparent;
  font-weight: 700;
  transition: filter .36s ease, transform .36s ease;
}

.product-card:hover .product-media {
  filter: saturate(1.08) contrast(1.02);
}

.product-media.ro-800g { background-image: linear-gradient(180deg, rgba(16, 36, 33, .02), rgba(16, 36, 33, .10)), url("images/products/ro-800g.jpg"); }
.product-media.ro-05t { background-image: linear-gradient(180deg, rgba(16, 36, 33, .02), rgba(16, 36, 33, .10)), url("images/products/ro-05t.jpg"); }
.product-media.ro-1t { background-image: linear-gradient(180deg, rgba(16, 36, 33, .02), rgba(16, 36, 33, .10)), url("images/products/ro-1t-product.jpg"); }
.product-media.ro-5t { background-image: linear-gradient(180deg, rgba(16, 36, 33, .02), rgba(16, 36, 33, .10)), url("images/products/ro-5t.jpg"); }
.product-media.ro-10t { background-image: linear-gradient(180deg, rgba(16, 36, 33, .02), rgba(16, 36, 33, .10)), url("images/products/ro-10t.jpg"); }
.product-media.ro-30t { background-image: linear-gradient(180deg, rgba(16, 36, 33, .02), rgba(16, 36, 33, .10)), url("images/products/ro-30t.jpg"); }
.product-media.station-c { background-image: linear-gradient(180deg, rgba(16, 36, 33, .02), rgba(16, 36, 33, .10)), url("images/products/station-c.jpg"); }
.product-media.station-r { background-image: linear-gradient(180deg, rgba(16, 36, 33, .02), rgba(16, 36, 33, .10)), url("images/products/station-r.jpg"); }
.product-media.station-s { background-image: linear-gradient(180deg, rgba(16, 36, 33, .02), rgba(16, 36, 33, .10)), url("images/products/station-s.jpg"); }
.product-media.dispenser-2 { background-image: linear-gradient(180deg, rgba(16, 36, 33, .02), rgba(16, 36, 33, .10)), url("images/products/dispenser-2.jpg"); }
.product-media.dispenser-4 { background-image: linear-gradient(180deg, rgba(16, 36, 33, .02), rgba(16, 36, 33, .10)), url("images/products/dispenser-4.jpg"); }
.product-media.dispenser-6 { background-image: linear-gradient(180deg, rgba(16, 36, 33, .02), rgba(16, 36, 33, .10)), url("images/products/dispenser-6.jpg"); }

.product-media.station {
  background-image:
    linear-gradient(180deg, rgba(16, 36, 33, .02), rgba(16, 36, 33, .08)),
    url("images/drinking-station-case.jpg");
  background-position: center;
  background-size: contain;
  background-repeat: no-repeat;
}

.product-media.surface {
  background-image:
    linear-gradient(135deg, rgba(16, 36, 33, .90), rgba(10, 127, 143, .64)),
    url("images/hero-industrial-water.jpg");
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
}

.product-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 16px;
}

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

.spec-list {
  margin: 18px 0 22px;
  border-top: 1px solid var(--line);
}

.spec-list div {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.spec-list strong { color: var(--ink); text-align: right; }

.text-link {
  margin-top: auto;
  color: var(--green);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color .22s ease, gap .22s ease;
}

.text-link::after {
  content: "→";
  transition: transform .22s ease;
}

.text-link:hover {
  color: var(--blue);
  gap: 10px;
}

.text-link:hover::after {
  transform: translateX(3px);
}

.case-card { overflow: hidden; }
.case-card {
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}

.case-card:hover {
  transform: translateY(-7px);
  border-color: rgba(93, 127, 69, .45);
  box-shadow: var(--shadow);
}
.case-card .case-image {
  aspect-ratio: 4 / 3;
  min-height: 190px;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    linear-gradient(135deg, rgba(16, 36, 33, .05), rgba(10, 127, 143, .08)),
    #f3f2eb;
  border-bottom: 1px solid var(--line);
}
.case-card .case-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 10px;
  transition: transform .34s ease, filter .34s ease;
}
.case-card:hover .case-image img {
  transform: scale(1.035);
  filter: saturate(1.08);
}
.case-card .case-body { padding: 24px; }

.process {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: rgba(255, 253, 248, .18);
}

.process-step {
  padding: 28px 22px;
  background: linear-gradient(145deg, rgba(255, 253, 248, .08), rgba(181, 138, 58, .08));
  transition: background .28s ease, transform .28s ease;
}

.process-step:hover {
  transform: translateY(-4px);
  background: linear-gradient(145deg, rgba(255, 253, 248, .12), rgba(75, 182, 168, .16));
}

.process-step strong {
  display: block;
  color: #9fe5d9;
  font-size: 13px;
  margin-bottom: 12px;
}

.process-step h3 { margin: 0 0 8px; font-size: 18px; }
.process-step p { margin: 0; color: rgba(255, 255, 255, .72); font-size: 14px; }

.page-hero {
  padding: 92px 28px 70px;
  color: #fff;
  background:
    radial-gradient(circle at 78% 18%, rgba(181, 138, 58, .22), transparent 28%),
    linear-gradient(90deg, rgba(16, 36, 33, .94), rgba(16, 36, 33, .62)),
    url("images/hero-industrial-water.jpg") center/cover no-repeat;
}

.page-hero .container {
  display: grid;
  grid-template-columns: minmax(0, 680px) minmax(0, 1fr);
  gap: 42px;
  align-items: end;
}

.page-hero h1 {
  margin: 14px 0 16px;
  font-size: clamp(38px, 6vw, 64px);
  line-height: 1.06;
}

.page-hero p {
  margin: 0;
  color: rgba(255, 255, 255, .82);
  font-size: 18px;
}

.breadcrumb {
  color: rgba(255, 255, 255, .72);
  font-size: 13px;
}

.tabs {
  position: sticky;
  top: 72px;
  z-index: 20;
  background: #fffdf8;
  border-bottom: 1px solid var(--line);
}

.tabs .container {
  display: flex;
  overflow-x: auto;
}

.tabs a {
  padding: 18px 24px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
  position: relative;
  transition: color .22s ease, background-color .22s ease;
}

.tabs a:hover { color: var(--blue); background: rgba(75, 182, 168, .08); }

.tabs a::after {
  content: "";
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 0;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .24s ease;
}

.tabs a:hover::after { transform: scaleX(1); }

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

.faq-item {
  padding: 24px;
  transition: transform .26s ease, border-color .26s ease, box-shadow .26s ease;
}

.faq-item:hover {
  transform: translateY(-4px);
  border-color: rgba(93, 127, 69, .42);
  box-shadow: 0 14px 32px rgba(16, 36, 33, .10);
}

.faq-item h2, .faq-item h3 {
  margin: 0 0 10px;
  font-size: 21px;
}

.faq-item p {
  margin: 0;
  color: var(--muted);
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
  gap: 34px;
}

.contact-list {
  display: grid;
  gap: 16px;
}

.contact-card {
  padding: 22px;
  background: #fffdf8;
  border: 1px solid var(--line);
  border-radius: 8px;
  transition: transform .26s ease, border-color .26s ease, box-shadow .26s ease;
}

.contact-card:hover {
  transform: translateY(-4px);
  border-color: rgba(93, 127, 69, .42);
  box-shadow: 0 12px 28px rgba(16, 36, 33, .10);
}

.contact-card span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.contact-card strong { font-size: 17px; }

.qr {
  width: 128px;
  height: 128px;
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  object-fit: cover;
}

.form {
  padding: 30px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

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

.field { display: grid; gap: 7px; margin-bottom: 16px; }
.field.full { grid-column: 1 / -1; }

label {
  color: #2e394a;
  font-size: 13px;
  font-weight: 700;
}

input, select, textarea {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font: inherit;
  background: #fbfaf5;
  transition: border-color .22s ease, box-shadow .22s ease, background-color .22s ease;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--blue);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(10, 127, 143, .12);
}

textarea { min-height: 124px; resize: vertical; }

.site-footer {
  padding: 58px 28px 28px;
  color: rgba(255, 255, 255, .68);
  background: #0b1715;
}

.footer-grid {
  width: min(1240px, 100%);
  margin: 0 auto 36px;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.1fr;
  gap: 34px;
}

.site-footer h2, .site-footer h3 {
  margin: 0 0 14px;
  color: #fff;
  font-size: 16px;
}

.site-footer ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer li { margin-bottom: 8px; }
.site-footer a:hover { color: #fff; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
}

.footer-bottom {
  width: min(1240px, 100%);
  margin: 0 auto;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, .12);
  display: flex;
  justify-content: space-between;
  gap: 18px;
  font-size: 13px;
}

@media (max-width: 980px) {
  .menu-toggle { display: block; }
  .nav-links {
    position: absolute;
    inset: 72px 0 auto 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 28px 22px;
    background: #fff;
    border-bottom: 1px solid var(--line);
  }
  .nav-links.open { display: flex; }
  .nav-links a { display: block; padding: 12px 0; }
  .header-actions .button { display: none; }
  .hero-metrics, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3, .section-head, .page-hero .container, .contact-grid, .footer-grid { grid-template-columns: 1fr; }
  .process { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .nav { padding: 0 18px; }
  .brand { min-width: 0; }
  .brand strong { font-size: 16px; }
  .hero-inner { width: calc(100% - 36px); padding: 64px 0 104px; }
  .hero p { font-size: 16px; }
  .hero-metrics { grid-template-columns: 1fr 1fr; }
  .metric { padding: 16px; min-height: 92px; }
  .metric strong { font-size: 23px; }
  .section { padding: 66px 18px; }
  .page-hero { padding: 68px 18px 52px; }
  .process, .form-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
}