/* ============================================================
   ????????? - ??????
   ???????????? / Industrial Utilitarian
   ?????0A2540 ?????00C2FF ?????FF6B00
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700;900&family=Barlow+Condensed:wght@400;600;700&display=swap');

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; scroll-padding-top: 80px; }
body {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: #1a2535;
  background: #F4F7FA;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }
ul, ol { list-style: none; }

/* ---- CSS Variables ---- */
:root {
  --navy:      #0A2540;
  --navy-mid:  #1A3A5C;
  --blue:      #00C2FF;
  --blue-dim:  #0099CC;
  --orange:    #FF6B00;
  --orange-dim:#cc5500;
  --gray-50:   #F4F7FA;
  --gray-100:  #E8EDF3;
  --gray-200:  #CDD5E0;
  --gray-400:  #8A96A8;
  --gray-600:  #4A5568;
  --white:     #FFFFFF;
  --shadow-sm: 0 2px 8px rgba(10,37,64,.08);
  --shadow-md: 0 6px 24px rgba(10,37,64,.12);
  --shadow-lg: 0 16px 48px rgba(10,37,64,.18);
  --radius-sm: 4px;
  --radius:    8px;
  --radius-lg: 16px;
  --nav-h:     68px;
  --transition: 0.25s ease;
}

/* ---- ??? ---- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}
@media (max-width: 768px) {
  .container { padding: 0 20px; }
}

/* ============================================================
   ?????
   ============================================================ */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: rgba(10, 37, 64, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 194, 255, 0.15);
  transition: box-shadow var(--transition);
}
.site-nav.scrolled {
  box-shadow: 0 4px 32px rgba(0,0,0,.3);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  cursor: pointer;
  text-decoration: none;
}
.nav-logo-mark {
  width: 120px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.nav-logo-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.nav-logo-cn {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 1px;
}
.nav-logo-en {
  font-size: 10px;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 600;
  color: var(--blue);
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* ??? */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-menu > li {
  position: relative;
}
.nav-menu > li > a {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: rgba(255,255,255,.75);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}
.nav-menu > li > a:hover,
.nav-menu > li > a.active {
  color: #fff;
  background: rgba(0,194,255,.12);
}
.nav-menu > li > a.active {
  color: var(--blue);
}
/* ?????? */
.nav-menu > li > a .nav-arrow {
  width: 12px;
  height: 12px;
  transition: transform var(--transition);
  stroke: currentColor;
  fill: none;
}
.nav-menu > li:hover > a .nav-arrow { transform: rotate(180deg); }

/* ?????? */
.nav-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 160px;
  background: var(--navy);
  border: 1px solid rgba(0,194,255,.2);
  border-radius: var(--radius);
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  box-shadow: var(--shadow-lg);
  z-index: 100;
}
.nav-menu > li:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.nav-dropdown a {
  display: block;
  padding: 9px 18px;
  font-size: 13px;
  color: rgba(255,255,255,.7);
  transition: color var(--transition), background var(--transition);
}
.nav-dropdown a:hover {
  color: var(--blue);
  background: rgba(0,194,255,.08);
}

/* CTA ??? */
.nav-cta {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--orange) !important;
  color: #fff !important;
  padding: 9px 20px !important;
  border-radius: 4px !important;
  font-size: 14px !important;
  font-weight: 600 !important;
  letter-spacing: .5px;
  transition: background var(--transition), transform var(--transition) !important;
  margin-left: 8px;
}
.nav-cta:hover {
  background: var(--orange-dim) !important;
  transform: translateY(-1px);
  color: #fff !important;
}
.nav-cta svg { width: 14px; height: 14px; fill: none; stroke: #fff; stroke-width: 2.5; }

/* ?????? */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 6px;
  background: none;
  border: none;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: rgba(255,255,255,.8);
  transition: transform var(--transition), opacity var(--transition);
  border-radius: 1px;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ????????*/
.nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: var(--navy);
  border-top: 1px solid rgba(0,194,255,.15);
  padding: 16px 0 24px;
  z-index: 999;
  box-shadow: 0 8px 32px rgba(0,0,0,.3);
  overflow-y: auto;
  max-height: calc(100vh - var(--nav-h));
}
.nav-mobile.open { display: block; }
.nav-mobile-list { padding: 0 24px; }
.nav-mobile-list li a {
  display: block;
  padding: 12px 0;
  font-size: 15px;
  color: rgba(255,255,255,.8);
  border-bottom: 1px solid rgba(255,255,255,.06);
  font-weight: 500;
}
.nav-mobile-list li:last-child a { border-bottom: none; }
.nav-mobile-list li a:hover { color: var(--blue); }
.nav-mobile-sub { padding-left: 16px; }
.nav-mobile-sub li a {
  font-size: 13px;
  color: rgba(255,255,255,.55);
  padding: 8px 0;
}
.nav-mobile-cta {
  margin: 16px 24px 0;
  display: block;
  text-align: center;
  background: var(--orange);
  color: #fff !important;
  padding: 12px !important;
  border-radius: 4px !important;
  font-weight: 600 !important;
  font-size: 15px !important;
}

@media (max-width: 900px) {
  .nav-menu, .nav-cta { display: none; }
  .nav-hamburger { display: flex; }
}

/* ============================================================
   ???
   ============================================================ */
.site-footer {
  background: var(--navy);
  border-top: 1px solid rgba(0,194,255,.15);
  padding: 56px 0 0;
  margin-top: auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.footer-qrcode {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.qrcode-item {
  text-align: center;
}

.qrcode-label {
  font-size: 13px;
  color: #fff;
  margin-bottom: 10px;
}

.qrcode-box {
  background: #fff;
  border-radius: 6px;
  padding: 4px;
  display: inline-block;
}

.qrcode-box img {
  width: 100px;
  height: 100px;
  display: block;
}

.footer-brand h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--blue);
  letter-spacing: 1px;
  margin-bottom: 12px;
}
.footer-brand h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--blue);
  letter-spacing: 1px;
  margin-bottom: 12px;
  text-transform: none;
}
.footer-brand p {
  font-size: 13px;
  color: rgba(255,255,255,.5);
  line-height: 1.8;
  max-width: 280px;
  margin-bottom: 20px;
}
.footer-social {
  display: flex;
  gap: 10px;
}
.footer-social a {
  width: 32px; height: 32px;
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  transition: border-color var(--transition), background var(--transition);
}
.footer-social a:hover {
  border-color: var(--blue);
  background: rgba(0,194,255,.1);
}
.footer-social a svg { width: 14px; height: 14px; fill: rgba(255,255,255,.6); }
.footer-social a:hover svg { fill: var(--blue); }

.footer-col h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--blue);
  letter-spacing: 2px;
  text-transform: uppercase;
  font-family: 'Barlow Condensed', sans-serif;
  margin-bottom: 16px;
}
.footer-col ul li a {
  font-size: 13px;
  color: rgba(255,255,255,.55);
  display: block;
  padding: 5px 0;
  transition: color var(--transition);
}
.footer-col ul li a:hover { color: rgba(255,255,255,.9); }

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 14px;
}
.footer-contact-item svg {
  width: 18px; height: 18px;
  fill: var(--blue);
  stroke: none;
  flex-shrink: 0;
  margin-top: 2px;
}
.footer-contact-item span {
  font-size: 13px;
  color: rgba(255,255,255,.6);
  line-height: 1.6;
}
.footer-contact-item strong {
  color: rgba(255,255,255,.85);
  font-weight: 600;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom p {
  font-size: 12px;
  color: rgba(255,255,255,.3);
}
.footer-bottom a {
  color: rgba(255,255,255,.4);
  transition: color var(--transition);
}
.footer-bottom a:hover { color: var(--blue); }

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .footer-brand { grid-column: 1 / -1; }
  .footer-qrcode { grid-column: 1 / -1; display: flex; flex-direction: row; justify-content: center; gap: 40px; }
  .qrcode-item { width: 120px; }
}
@media (max-width: 560px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ============================================================
   ??????
   ============================================================ */

/* ????????? */
.page-top-spacer { height: var(--nav-h); }

/* ?????*/
.breadcrumb-bar {
  background: var(--white);
  border-bottom: 1px solid var(--gray-100);
  padding: 12px 0;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--gray-400);
  margin-bottom: 16px;
}
.breadcrumb a { color: var(--gray-400); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--navy); }
.breadcrumb .bc-sep { opacity: .4; }
.breadcrumb .bc-current { color: var(--gray-600); font-weight: 500; }

/* ??? Hero ??*/
.page-hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%);
  padding: 60px 0 52px;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  top: -60px; right: -60px;
  width: 320px; height: 320px;
  background: radial-gradient(circle, rgba(0,194,255,.15) 0%, transparent 70%);
  border-radius: 50%;
}
.page-hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--blue), transparent);
}
.page-hero-title {
  font-size: 36px;
  font-weight: 900;
  color: #fff;
  letter-spacing: 1px;
  margin-bottom: 10px;
}
.page-hero-sub {
  font-size: 15px;
  color: rgba(255,255,255,.6);
}

/* ??? */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  letter-spacing: .3px;
}
.btn svg { width: 16px; height: 16px; }
.btn-primary {
  background: var(--orange);
  color: #fff;
  box-shadow: 0 4px 16px rgba(255,107,0,.35);
}
.btn-primary:hover {
  background: var(--orange-dim);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,107,0,.4);
}
.btn-blue {
  background: var(--blue);
  color: var(--navy);
  box-shadow: 0 4px 16px rgba(0,194,255,.3);
}
.btn-blue:hover {
  background: #00aae6;
  transform: translateY(-2px);
}
.btn-outline {
  background: transparent;
  color: var(--navy);
  border: 2px solid var(--navy);
}
.btn-outline:hover {
  background: var(--navy);
  color: #fff;
}
.btn-outline-white {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,.4);
}
.btn-outline-white:hover {
  background: rgba(255,255,255,.1);
  border-color: #fff;
}

/* ??? */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 2px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  font-family: 'Barlow Condensed', sans-serif;
}
.tag-blue { background: rgba(0,194,255,.12); color: var(--blue); }
.tag-orange { background: rgba(255,107,0,.12); color: var(--orange); }
.tag-navy { background: rgba(10,37,64,.08); color: var(--navy); }

/* Section ??? */
.section-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  font-family: 'Barlow Condensed', sans-serif;
  color: var(--blue);
  margin-bottom: 10px;
}
.section-title {
  font-size: 32px;
  font-weight: 900;
  color: var(--navy);
  line-height: 1.25;
  letter-spacing: -.3px;
}
.section-title span { color: var(--blue); }
.section-desc {
  font-size: 15px;
  color: var(--gray-600);
  margin-top: 12px;
  max-width: 560px;
  line-height: 1.8;
}

/* ?????? */
.card {
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--gray-100);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0,194,255,.3);
}

/* ?????*/
.deco-line {
  display: block;
  width: 40px;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--orange));
  border-radius: 2px;
  margin: 14px 0;
}

/* ????????*/
#back-top {
  position: fixed;
  right: 24px;
  bottom: 32px;
  width: 40px;
  height: 40px;
  background: var(--navy);
  border: 1px solid rgba(0,194,255,.3);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--transition), transform var(--transition), background var(--transition);
  z-index: 900;
}
#back-top.show { opacity: 1; transform: translateY(0); }
#back-top:hover { background: var(--navy-mid); border-color: var(--blue); }
#back-top svg { width: 16px; height: 16px; stroke: var(--blue); fill: none; stroke-width: 2.5; }

/* ????????*/
:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

/* ????????? */
@media (max-width: 768px) {
  .hide-mobile { display: none !important; }
  .section-title { font-size: 26px; }
}
@media (min-width: 769px) {
  .hide-desktop { display: none !important; }
}

/* ============================================================
   ?????????
   ============================================================ */
.contact-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 37, 64, .55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s ease, visibility .3s ease;
}
.contact-modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.contact-modal {
  background: #fff;
  border-radius: 16px;
  padding: 40px 36px 36px;
  width: 400px;
  max-width: 92vw;
  position: relative;
  box-shadow: 0 24px 64px rgba(10, 37, 64, .25), 0 0 0 1px rgba(0, 194, 255, .1);
  transform: translateY(20px) scale(.97);
  transition: transform .35s cubic-bezier(.16, 1, .3, 1);
}
.contact-modal-overlay.active .contact-modal {
  transform: translateY(0) scale(1);
}

.contact-modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  border: none;
  background: var(--gray-100);
  border-radius: 50%;
  font-size: 20px;
  line-height: 1;
  color: var(--gray-500);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), color var(--transition);
}
.contact-modal-close:hover {
  background: var(--navy);
  color: #fff;
}

.contact-modal-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--blue), #0077FF);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  box-shadow: 0 8px 24px rgba(0, 194, 255, .3);
}
.contact-modal-icon svg {
  width: 28px;
  height: 28px;
  stroke: #fff;
  fill: none;
}

.contact-modal-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--navy);
  text-align: center;
  margin: 0 0 6px;
  letter-spacing: .5px;
}

.contact-modal-subtitle {
  font-size: 14px;
  color: var(--gray-400);
  text-align: center;
  margin: 0 0 28px;
}

.contact-modal-items {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 28px;
}

.contact-modal-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: var(--gray-50);
  border-radius: 10px;
  transition: background var(--transition);
}
.contact-modal-item:hover {
  background: var(--gray-100);
}

.contact-modal-item-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.contact-modal-item-icon svg {
  width: 18px;
  height: 18px;
}
.phone-icon { background: rgba(0, 194, 255, .12); }
.phone-icon svg { stroke: var(--blue); fill: none; stroke-width: 2; }
.time-icon { background: rgba(255, 107, 0, .1); }
.time-icon svg { stroke: var(--orange); fill: none; stroke-width: 2; }
.addr-icon { background: rgba(10, 37, 64, .08); }
.addr-icon svg { stroke: var(--navy); fill: none; stroke-width: 2; }

.contact-modal-label {
  font-size: 12px;
  color: var(--gray-400);
  margin-bottom: 2px;
}
.contact-modal-value {
  font-size: 15px;
  font-weight: 600;
  color: var(--navy);
  text-decoration: none;
}
a.contact-modal-value:hover {
  color: var(--blue);
}

.contact-modal-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--orange), #e05500);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  border-radius: 10px;
  text-decoration: none;
  letter-spacing: .5px;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 16px rgba(255, 107, 0, .35);
}
.contact-modal-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 107, 0, .45);
}

/* ???????? */
.nav-mobile-cta {
  cursor: pointer;
  border: none;
}

@media (max-width: 480px) {
  .contact-modal {
    padding: 32px 24px 28px;
  }
  .contact-modal-title {
    font-size: 20px;
  }
}