:root {
  --ink: #071018;
  --panel: #101a24;
  --panel-2: #172432;
  --line: rgba(255, 255, 255, 0.13);
  --text: #edf5f8;
  --muted: #aebbc3;
  --paper: #f5f7f7;
  --paper-2: #e8edf0;
  --dark-copy: #10202a;
  --dark-muted: #52636d;
  --cyan: #23c7d9;
  --amber: #f0b64b;
  --green: #39c884;
  --red: #e85d5d;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
  --radius: 8px;
  --max: 1180px;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
  background:
    radial-gradient(circle at 12% 4%, rgba(35, 199, 217, 0.14), transparent 32rem),
    linear-gradient(135deg, #061018 0%, #101822 42%, #19170f 100%);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
}

body.nav-open {
  overflow: hidden;
}

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

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

button,
input,
textarea {
  font: inherit;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: -4rem;
  z-index: 1000;
  padding: 0.65rem 1rem;
  background: var(--cyan);
  color: #031117;
  border-radius: 6px;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
  background: rgba(5, 12, 18, 0.86);
  backdrop-filter: blur(18px);
}

.nav-wrap {
  width: min(var(--max), calc(100% - 40px));
  min-height: 76px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  min-width: 180px;
}

.brand-mark {
  width: 44px;
  height: 44px;
  border: 1px solid rgba(35, 199, 217, 0.65);
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: var(--amber);
  font-weight: 900;
  letter-spacing: 0;
  background:
    linear-gradient(135deg, rgba(35, 199, 217, 0.2), transparent 46%),
    rgba(255, 255, 255, 0.05);
  box-shadow: 0 0 24px rgba(35, 199, 217, 0.22);
}

.brand-title {
  display: block;
  font-size: 1.06rem;
  font-weight: 800;
  line-height: 1.1;
}

.brand-subtitle {
  display: block;
  margin-top: 0.12rem;
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
}

.desktop-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  flex: 1;
}

.desktop-nav a,
.mobile-panel a {
  color: rgba(237, 245, 248, 0.76);
  border-radius: 6px;
}

.desktop-nav a {
  padding: 0.62rem 0.72rem;
  font-size: 0.92rem;
  white-space: nowrap;
}

.desktop-nav a:hover,
.desktop-nav a.active,
.mobile-panel a:hover,
.mobile-panel a.active {
  color: #fff;
  background: rgba(35, 199, 217, 0.13);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: currentColor;
}

.mobile-panel {
  display: none;
}

.btn,
.ghost-btn,
.text-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 44px;
  border-radius: 6px;
  cursor: pointer;
}

.btn {
  padding: 0.74rem 1.1rem;
  background: linear-gradient(135deg, var(--amber), #ffe0a1 52%, #f7ba4f);
  color: #1b160b;
  border: 0;
  font-weight: 800;
  box-shadow: 0 12px 30px rgba(240, 182, 75, 0.22);
  white-space: normal;
  text-align: center;
}

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

.ghost-btn {
  padding: 0.68rem 1rem;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.045);
  white-space: normal;
  text-align: center;
}

.ghost-btn:hover {
  border-color: rgba(35, 199, 217, 0.68);
  background: rgba(35, 199, 217, 0.12);
}

.light .ghost-btn {
  color: var(--dark-copy);
  border-color: rgba(12, 31, 43, 0.28);
  background: rgba(12, 31, 43, 0.04);
}

.light .ghost-btn:hover {
  color: #071018;
  border-color: rgba(35, 199, 217, 0.72);
  background: rgba(35, 199, 217, 0.12);
}

.text-link {
  min-height: auto;
  color: var(--cyan);
  font-weight: 800;
}

.text-link::after {
  content: ">";
  color: var(--amber);
}

.hero {
  position: relative;
  min-height: calc(100svh - 76px);
  display: grid;
  align-items: end;
  overflow: hidden;
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(5, 11, 17, 0.93) 0%, rgba(5, 11, 17, 0.68) 40%, rgba(5, 11, 17, 0.18) 100%),
    linear-gradient(0deg, rgba(5, 11, 17, 0.92) 0%, rgba(5, 11, 17, 0.18) 36%);
  z-index: -1;
}

.hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

.hero-content {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: clamp(4.5rem, 8vw, 8rem) 0 2.4rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--amber);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 34px;
  height: 2px;
  background: var(--cyan);
}

.hero h1,
.page-hero h1 {
  max-width: 820px;
  margin: 0.9rem 0 1rem;
  font-size: clamp(2.3rem, 6vw, 5.7rem);
  line-height: 0.98;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

.hero h1 span,
.page-hero h1 span {
  color: var(--cyan);
}

.hero-lead,
.page-lead {
  max-width: 740px;
  color: rgba(237, 245, 248, 0.82);
  font-size: clamp(1rem, 1.8vw, 1.22rem);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.hero-actions,
.section-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.6rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(2rem, 6vw, 4rem);
  border: 1px solid var(--line);
  background: var(--line);
  box-shadow: var(--shadow);
}

.stat {
  min-height: 118px;
  padding: 1.15rem;
  background: rgba(11, 22, 31, 0.78);
}

.stat strong {
  display: block;
  color: #fff;
  font-size: clamp(1.45rem, 3vw, 2.25rem);
  line-height: 1.1;
}

.stat span {
  display: block;
  margin-top: 0.38rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.section {
  padding: clamp(4rem, 8vw, 7rem) 0;
}

.section.light {
  background:
    linear-gradient(180deg, rgba(232, 237, 240, 0.98), rgba(245, 247, 247, 0.98)),
    var(--paper);
  color: var(--dark-copy);
}

.section.steel {
  background:
    linear-gradient(135deg, rgba(16, 26, 36, 0.98), rgba(27, 32, 35, 0.98)),
    var(--panel);
}

.section.band {
  background:
    linear-gradient(90deg, rgba(35, 199, 217, 0.18), rgba(240, 182, 75, 0.1)),
    #08121b;
}

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

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.7fr);
  gap: clamp(1.4rem, 4vw, 4rem);
  align-items: end;
  margin-bottom: clamp(1.8rem, 4vw, 3rem);
}

.section-head h2,
.split-copy h2,
.cta h2 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 3.1rem);
  line-height: 1.08;
  letter-spacing: 0;
}

.section-head p,
.split-copy p,
.cta p {
  margin: 0;
  color: var(--muted);
}

.light .section-head p,
.light .split-copy p {
  color: var(--dark-muted);
}

.sub-en {
  display: block;
  margin-top: 0.45rem;
  color: var(--cyan);
  font-size: 0.58em;
  line-height: 1.25;
  font-weight: 700;
}

.grid {
  display: grid;
  gap: 1rem;
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  position: relative;
  min-height: 100%;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.035)),
    rgba(9, 18, 27, 0.62);
  overflow: hidden;
}

.light .card {
  border-color: rgba(12, 31, 43, 0.14);
  background: #fff;
  box-shadow: 0 18px 40px rgba(19, 36, 48, 0.09);
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--amber), var(--green));
  opacity: 0.9;
}

.card h3 {
  margin: 0 0 0.55rem;
  color: #fff;
  font-size: 1.25rem;
  overflow-wrap: anywhere;
}

.light .card h3 {
  color: var(--dark-copy);
}

.light .card h3 {
  font-size: 1.16rem;
}

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

.light .card p {
  color: var(--dark-muted);
}

.card ul,
.model-list,
.check-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.card li,
.check-list li {
  position: relative;
  margin-top: 0.65rem;
  padding-left: 1.1rem;
  color: var(--muted);
}

.light .card li,
.light .check-list li {
  color: var(--dark-muted);
}

.card li::before,
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 6px;
  background: var(--amber);
}

.media-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.78fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: center;
}

.media-frame {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: var(--shadow);
  background: #0a141d;
}

.media-frame img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, transparent, rgba(5, 11, 17, 0.22)),
    linear-gradient(90deg, rgba(35, 199, 217, 0.12), transparent);
  pointer-events: none;
}

.split-copy .kicker {
  margin: 0 0 0.8rem;
  color: var(--amber);
  font-weight: 800;
}

.feature-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.08);
}

.light .feature-strip {
  border-color: rgba(12, 31, 43, 0.14);
  background: #fff;
  box-shadow: 0 18px 40px rgba(19, 36, 48, 0.08);
}

.feature-strip div {
  min-height: 112px;
  padding: 1rem;
  border-right: 1px solid var(--line);
}

.light .feature-strip div {
  border-right-color: rgba(12, 31, 43, 0.12);
}

.feature-strip div:last-child {
  border-right: 0;
}

.feature-strip strong {
  display: block;
  color: #fff;
  font-size: 1.05rem;
}

.light .feature-strip strong {
  color: var(--dark-copy);
}

.feature-strip span {
  display: block;
  margin-top: 0.3rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.light .feature-strip span {
  color: var(--dark-muted);
}

.page-hero {
  position: relative;
  padding: clamp(4rem, 9vw, 7rem) 0 clamp(3rem, 7vw, 5rem);
  overflow: hidden;
  isolation: isolate;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(5, 11, 17, 0.88), rgba(5, 11, 17, 0.72)),
    var(--hero-bg, linear-gradient(135deg, #08131c, #1d2a31));
  z-index: -2;
}

.page-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), var(--amber), transparent);
}

.page-hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.36;
  z-index: -3;
}

.breadcrumbs {
  display: flex;
  gap: 0.45rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.breadcrumbs a {
  color: var(--cyan);
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1.35rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0.35rem 0.72rem;
  border: 1px solid rgba(255, 255, 255, 0.17);
  border-radius: 999px;
  color: rgba(237, 245, 248, 0.86);
  background: rgba(255, 255, 255, 0.06);
  font-size: 0.9rem;
}

.light .pill {
  color: var(--dark-copy);
  border-color: rgba(12, 31, 43, 0.16);
  background: rgba(12, 31, 43, 0.05);
}

.process {
  counter-reset: process;
}

.process .card {
  padding-top: 3.1rem;
}

.process .card::after {
  counter-increment: process;
  content: "0" counter(process);
  position: absolute;
  left: 1.25rem;
  top: 0.9rem;
  color: var(--amber);
  font-size: 1.1rem;
  font-weight: 900;
}

.equipment-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.search-box {
  width: min(100%, 390px);
  min-height: 46px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
  padding: 0 0.95rem;
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.search-box::placeholder {
  color: rgba(237, 245, 248, 0.52);
}

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

.brand-card {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.055);
}

.brand-card h3 {
  margin: 0 0 0.7rem;
  color: #fff;
  font-size: 1.08rem;
}

.brand-card h3 span {
  color: var(--cyan);
  font-size: 0.9rem;
  font-weight: 700;
}

.model-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.42rem;
}

.model-list li {
  padding: 0.34rem 0.55rem;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 5px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.04);
  font-size: 0.88rem;
}

.hidden-brand {
  display: none;
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(320px, 1fr);
  gap: 1rem;
}

.contact-list {
  display: grid;
  gap: 0.85rem;
}

.contact-item {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.055);
}

.contact-item strong {
  display: block;
  color: var(--amber);
}

.contact-item span,
.contact-item a {
  display: block;
  margin-top: 0.22rem;
  color: #fff;
  overflow-wrap: anywhere;
}

.map-panel {
  min-height: 420px;
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(35, 199, 217, 0.14), transparent 38%),
    linear-gradient(315deg, rgba(240, 182, 75, 0.16), transparent 42%),
    rgba(255, 255, 255, 0.055);
  display: grid;
  align-content: space-between;
}

.map-visual {
  min-height: 230px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background:
    linear-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.055) 1px, transparent 1px),
    radial-gradient(circle at 58% 52%, rgba(240, 182, 75, 0.55), transparent 0.45rem),
    radial-gradient(circle at 58% 52%, rgba(35, 199, 217, 0.22), transparent 4rem),
    #0b1721;
  background-size: 38px 38px, 38px 38px, auto, auto, auto;
}

.cta {
  position: relative;
  padding: clamp(2rem, 5vw, 3rem);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(35, 199, 217, 0.18), transparent 36%),
    linear-gradient(315deg, rgba(240, 182, 75, 0.19), transparent 46%),
    #0a151e;
  overflow: hidden;
}

.cta p {
  max-width: 780px;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #050b11;
}

.footer-grid {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: 3rem 0;
  display: grid;
  grid-template-columns: 1.1fr 0.8fr 0.8fr;
  gap: 2rem;
}

.site-footer h2,
.site-footer h3 {
  margin: 0 0 0.7rem;
}

.site-footer p,
.site-footer li,
.site-footer a {
  color: var(--muted);
}

.footer-links {
  display: grid;
  gap: 0.4rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 1rem 0;
  color: var(--muted);
}

.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.floating-contact {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 70;
  display: grid;
  gap: 0.55rem;
}

.floating-contact a,
.floating-contact button {
  min-width: 118px;
  min-height: 42px;
  padding: 0.5rem 0.76rem;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
  color: #fff;
  background: rgba(6, 14, 21, 0.86);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.24);
  backdrop-filter: blur(12px);
  cursor: pointer;
}

.floating-contact a:hover,
.floating-contact button:hover {
  border-color: var(--cyan);
}

.copy-toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  z-index: 100;
  padding: 0.74rem 1rem;
  border-radius: 6px;
  background: rgba(7, 16, 24, 0.92);
  border: 1px solid var(--line);
  color: #fff;
  transform: translate(-50%, 1rem);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
}

.copy-toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (max-width: 1420px) {
  .desktop-nav a {
    padding-inline: 0.54rem;
  }

  .desktop-nav small {
    display: none;
  }
}

@media (max-width: 1120px) {
  .desktop-nav,
  .nav-actions .ghost-btn {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .mobile-panel {
    position: fixed;
    inset: 76px 0 auto 0;
    z-index: 75;
    display: grid;
    gap: 0.25rem;
    max-height: calc(100svh - 76px);
    padding: 1rem 20px 1.4rem;
    border-bottom: 1px solid var(--line);
    background: rgba(5, 11, 17, 0.97);
    transform: translateY(-115%);
    transition: transform 220ms ease;
    overflow: auto;
  }

  body.nav-open .mobile-panel {
    transform: translateY(0);
  }

  .mobile-panel a {
    padding: 0.84rem 0.8rem;
  }

  .hero-stats,
  .feature-strip,
  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .section-head,
  .media-split,
  .contact-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 720px) {
  body {
    padding-bottom: 74px;
  }

  .nav-wrap,
  .container,
  .hero-content,
  .footer-grid {
    width: calc(100% - 28px);
    max-width: var(--max);
  }

  .brand-subtitle {
    display: none;
  }

  .hero {
    min-height: 760px;
  }

  .hero h1,
  .page-hero h1 {
    font-size: clamp(1.95rem, 9vw, 2.65rem);
    line-height: 1.02;
  }

  .hero h1 span,
  .page-hero h1 span {
    display: block;
    font-size: 0.9em;
  }

  .hero-lead,
  .page-lead {
    max-width: 100%;
    font-size: 0.94rem;
    line-height: 1.58;
  }

  .hero-content {
    padding-bottom: 1.9rem;
  }

  .hero-actions,
  .section-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn,
  .ghost-btn {
    width: 100%;
  }

  .hero::before {
    background:
      linear-gradient(180deg, rgba(5, 11, 17, 0.7), rgba(5, 11, 17, 0.96) 62%),
      linear-gradient(90deg, rgba(5, 11, 17, 0.72), rgba(5, 11, 17, 0.22));
  }

  .hero-stats,
  .feature-strip,
  .grid-3,
  .grid-4,
  .brand-grid {
    grid-template-columns: 1fr;
  }

  .stat {
    min-height: 96px;
  }

  .footer-bottom .container {
    flex-direction: column;
  }

  .floating-contact {
    left: 14px;
    right: 14px;
    bottom: 14px;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.45rem;
  }

  .floating-contact a,
  .floating-contact button {
    min-width: 0;
    padding: 0.42rem 0.2rem;
    font-size: 0.82rem;
  }
}

@media (max-width: 430px) {
  .contact-item,
  .card {
    padding: 1rem;
  }
}