:root {
  --bg: #06111c;
  --panel: rgba(10, 25, 39, .82);
  --panel-strong: rgba(13, 36, 54, .94);
  --line: rgba(128, 224, 255, .18);
  --text: #eef8ff;
  --muted: #9db4c6;
  --cyan: #36d7ff;
  --teal: #22e0bd;
  --gold: #ffbf69;
  --white: #ffffff;
  --shadow: 0 24px 70px rgba(0, 0, 0, .34);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
  background:
    radial-gradient(circle at 78% 12%, rgba(54, 215, 255, .16), transparent 30rem),
    radial-gradient(circle at 18% 46%, rgba(255, 191, 105, .08), transparent 24rem),
    linear-gradient(180deg, #06111c 0%, #071625 48%, #08101a 100%);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(54, 215, 255, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(54, 215, 255, .055) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,.8), transparent 82%);
  z-index: -2;
}

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

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

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.12;
  letter-spacing: 0;
  word-break: keep-all;
  overflow-wrap: normal;
}

p {
  margin: 0;
  line-height: 1.75;
  color: var(--muted);
}

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(18px, 5vw, 72px);
  background: linear-gradient(180deg, rgba(4, 13, 22, .88), rgba(4, 13, 22, .28));
  backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: background .25s ease, border-color .25s ease, padding .25s ease;
}

.site-header.is-scrolled {
  padding-top: 12px;
  padding-bottom: 12px;
  background: rgba(4, 13, 22, .86);
  border-color: var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 150px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: #06111c;
  font-weight: 900;
  background: linear-gradient(135deg, var(--cyan), var(--gold));
  border-radius: 8px;
  box-shadow: 0 0 28px rgba(54, 215, 255, .32);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 18px;
}

.brand small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 32px);
  color: #c8d9e7;
  font-size: 14px;
}

.nav a {
  transition: color .2s ease;
}

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

.header-call {
  padding: 10px 14px;
  color: #07111a;
  font-weight: 800;
  background: var(--white);
  border-radius: 8px;
}

.hero {
  position: relative;
  min-height: 100vh;
  padding: 132px clamp(18px, 5vw, 72px) 76px;
  isolation: isolate;
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: -3;
  background:
    linear-gradient(90deg, rgba(4, 13, 22, .96) 0%, rgba(4, 13, 22, .82) 32%, rgba(4, 13, 22, .38) 68%, rgba(4, 13, 22, .72) 100%),
    url("assets/hero-ota-operations.png") center / cover no-repeat;
  transform: scale(1.02);
  animation: slowZoom 18s ease-in-out infinite alternate;
}

.grid-scan {
  position: absolute;
  inset: auto -20% 9% -20%;
  height: 220px;
  z-index: -1;
  background: repeating-linear-gradient(100deg, transparent 0 46px, rgba(54, 215, 255, .18) 47px, transparent 48px);
  opacity: .45;
  transform: skewY(-7deg);
  animation: scanMove 8s linear infinite;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(340px, .72fr);
  align-items: center;
  gap: clamp(34px, 6vw, 80px);
  max-width: 1240px;
  min-height: calc(100vh - 210px);
  margin: 0 auto;
}

.hero-copy {
  animation: riseIn .8s ease both;
}

.eyebrow {
  margin-bottom: 14px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(72px, 12vw, 150px);
  line-height: .9;
  text-shadow: 0 0 40px rgba(54, 215, 255, .22);
}

.hero-lead {
  margin-top: 26px;
  color: var(--white);
  font-size: clamp(24px, 3.35vw, 44px);
  font-weight: 800;
  line-height: 1.2;
}

.no-wrap-title {
  white-space: nowrap;
}

.hero-text {
  max-width: 690px;
  margin-top: 20px;
  font-size: 17px;
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 800;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn.primary {
  color: #04111c;
  background: linear-gradient(135deg, var(--cyan), var(--teal));
  box-shadow: 0 18px 42px rgba(54, 215, 255, .24);
}

.btn.secondary {
  background: rgba(255, 255, 255, .06);
}

.btn.landline {
  color: #eaf8ff;
  background: linear-gradient(135deg, rgba(32, 111, 255, .88), rgba(54, 215, 255, .28));
  border-color: rgba(54, 215, 255, .56);
  box-shadow: 0 14px 34px rgba(32, 111, 255, .22);
}

.btn.ghost {
  color: var(--gold);
  background: rgba(255, 191, 105, .08);
  border-color: rgba(255, 191, 105, .28);
}

.btn.large {
  min-height: 52px;
  padding-inline: 22px;
}

.hero-panel,
.trust-grid article,
.service-grid article,
.advantage-feature,
.advantage-list article,
.case-card,
.case-feature,
.contact-card {
  background: linear-gradient(180deg, rgba(18, 43, 63, .78), rgba(9, 22, 35, .9));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-panel {
  position: relative;
  padding: 24px;
  overflow: hidden;
  animation: riseIn .8s .15s ease both;
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: -1px;
  background: linear-gradient(120deg, transparent 10%, rgba(54, 215, 255, .18), transparent 38%);
  transform: translateX(-100%);
  animation: shine 5.5s ease-in-out infinite;
}

.panel-head,
.console-metric,
.panel-grid {
  position: relative;
  z-index: 1;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 13px;
}

.panel-head i {
  width: 10px;
  height: 10px;
  background: var(--teal);
  border-radius: 50%;
  box-shadow: 0 0 18px var(--teal);
}

.console-metric {
  margin-top: 30px;
}

.console-metric strong,
.console-metric span {
  display: block;
}

.console-metric strong {
  color: var(--white);
  font-size: 34px;
}

.console-metric span {
  margin-top: 8px;
  color: var(--cyan);
  font-size: 21px;
  font-weight: 800;
  word-break: keep-all;
}

.no-break,
.formula-line,
.formula-mini {
  white-space: nowrap;
}

.signal-bars {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: flex-end;
  gap: 10px;
  height: 150px;
  margin: 28px 0;
  padding: 16px;
  background: rgba(2, 10, 18, .4);
  border-radius: 8px;
}

.signal-bars span {
  flex: 1;
  height: var(--h);
  min-height: 24px;
  background: linear-gradient(180deg, var(--cyan), rgba(54, 215, 255, .08));
  border-radius: 6px 6px 0 0;
  transform-origin: bottom;
  animation: barPulse 2.8s ease-in-out infinite alternate;
}

.signal-bars span:nth-child(2n) {
  animation-delay: .35s;
}

.panel-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.panel-grid div {
  padding: 14px;
  background: rgba(255, 255, 255, .055);
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 8px;
}

.panel-grid b {
  display: block;
  color: var(--white);
  font-size: 26px;
}

.panel-grid span {
  color: var(--muted);
  font-size: 13px;
}

.section {
  max-width: 1240px;
  margin: 0 auto;
  padding: 92px clamp(18px, 5vw, 34px);
}

.section-head {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-head.wide {
  max-width: 920px;
}

.section h2 {
  font-size: clamp(32px, 5vw, 56px);
}

.section-head p:not(.eyebrow) {
  margin-top: 16px;
  font-size: 16px;
}

.trust-grid,
.service-grid,
.case-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.trust-grid article,
.service-grid article,
.case-card {
  padding: 22px;
  transition: transform .25s ease, border-color .25s ease, background .25s ease;
}

.trust-grid article:hover,
.service-grid article:hover,
.case-card:hover,
.case-feature:hover {
  transform: translateY(-5px);
  border-color: rgba(54, 215, 255, .44);
}

.icon,
.service-grid span,
.case-card span,
.case-content span,
.advantage-feature > span {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 900;
}

.trust-grid strong {
  display: block;
  margin-bottom: 10px;
  color: var(--white);
  font-size: 26px;
}

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

.service-grid h3,
.case-card h3,
.case-content h3,
.advantage-feature h3 {
  font-size: 22px;
}

.service-grid p,
.case-card p {
  margin-top: 12px;
  font-size: 14px;
}

.growth {
  display: grid;
  grid-template-columns: .95fr 1.05fr;
  align-items: center;
  gap: 40px;
}

.growth-visual {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.growth-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent, rgba(54, 215, 255, .18), transparent);
  transform: translateX(-100%);
  animation: shine 6s infinite;
}

.growth-visual img {
  width: 100%;
  height: 460px;
  object-fit: cover;
}

.growth-copy h2 {
  font-size: clamp(30px, 4.8vw, 54px);
}

.growth-copy p {
  margin-top: 18px;
}

.flow {
  display: grid;
  gap: 10px;
  margin-top: 28px;
}

.flow div {
  display: grid;
  grid-template-columns: 86px 1fr;
  gap: 14px;
  align-items: center;
  padding: 14px 16px;
  background: rgba(255, 255, 255, .055);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.flow b {
  color: var(--cyan);
}

.flow span {
  color: var(--muted);
}

.advantage-layout {
  display: grid;
  grid-template-columns: .82fr 1.18fr;
  gap: 18px;
}

.advantage-feature {
  padding: 34px;
  background:
    linear-gradient(180deg, rgba(15, 45, 68, .84), rgba(10, 24, 36, .94)),
    url("assets/ota-image5.png") center / cover no-repeat;
}

.advantage-feature h3 {
  font-size: clamp(28px, 4vw, 44px);
}

.advantage-feature p {
  margin-top: 18px;
}

.advantage-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.advantage-list article {
  padding: 24px;
}

.advantage-list b {
  color: var(--white);
  font-size: 20px;
}

.advantage-list p {
  margin-top: 10px;
}

.case-showcase {
  display: grid;
  gap: 22px;
}

.case-feature {
  display: grid;
  grid-template-columns: 1.35fr .65fr;
  gap: 0;
  overflow: hidden;
  transition: transform .25s ease, border-color .25s ease;
}

.case-feature.reverse {
  grid-template-columns: .65fr 1.35fr;
}

.case-feature.reverse .case-image {
  order: 2;
}

.case-image {
  min-height: 360px;
  background: rgba(255,255,255,.04);
  overflow: hidden;
}

.case-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: left top;
  filter: contrast(1.04) saturate(1.03);
  transform: scale(1.01);
  transition: transform .35s ease;
}

.case-feature:hover .case-image img {
  transform: scale(1.045);
}

.case-content {
  padding: clamp(24px, 3vw, 38px);
  align-self: center;
}

.case-content p {
  margin-top: 14px;
}

.case-content dl {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 24px 0 0;
}

.case-content div {
  padding: 14px;
  background: rgba(255,255,255,.055);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 8px;
}

.case-content dt {
  color: var(--muted);
  font-size: 12px;
}

.case-content dd {
  margin: 6px 0 0;
  color: var(--white);
  font-size: 24px;
  font-weight: 900;
}

.case-grid.compact {
  grid-template-columns: 1.1fr .9fr;
  margin-top: 18px;
}

.case-card.highlight {
  position: relative;
  overflow: hidden;
}

.case-card.highlight::after {
  content: "";
  position: absolute;
  width: 180px;
  height: 180px;
  right: -70px;
  bottom: -90px;
  border-radius: 50%;
  background: rgba(54, 215, 255, .16);
}

.delta {
  position: relative;
  display: flex;
  align-items: end;
  gap: 10px;
  margin-top: 22px;
}

.delta b {
  color: var(--teal);
  font-size: 42px;
}

.delta small {
  color: var(--muted);
}

.contact-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 24px;
  padding: clamp(26px, 5vw, 52px);
  background:
    linear-gradient(120deg, rgba(14, 42, 62, .94), rgba(5, 15, 25, .96)),
    url("assets/hero-ota-operations.png") center / cover no-repeat;
}

.contact-card h2 {
  max-width: 760px;
}

.contact-title span {
  display: block;
  text-align: left;
}

.contact-card > div:first-child p:not(.eyebrow) {
  margin-top: 16px;
  max-width: 720px;
}

.contact-actions {
  align-content: start;
  justify-content: flex-end;
  max-width: 360px;
  margin-top: 0;
  padding: 18px;
  background: rgba(4, 15, 25, .52);
  border: 1px solid rgba(54, 215, 255, .16);
  border-radius: 8px;
}

.contact-actions .btn {
  width: 100%;
}

.contact-info {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 4px 0 0;
}

.contact-info div {
  padding: 16px;
  background: rgba(255,255,255,.055);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 8px;
}

.contact-info dt {
  color: var(--cyan);
  font-size: 13px;
  font-weight: 800;
}

.contact-info dd {
  margin: 8px 0 0;
  color: var(--text);
}

.address-box {
  position: relative;
}

.map-link {
  display: inline-flex;
  margin-top: 12px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 800;
}

.contact-map {
  grid-column: 1 / -1;
  position: relative;
  margin: 4px 0 0;
  overflow: hidden;
  background: rgba(4, 15, 25, .68);
  border: 1px solid rgba(54, 215, 255, .22);
  border-radius: 8px;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.035), 0 26px 70px rgba(0,0,0,.24);
}

.contact-map::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(120deg, transparent 8%, rgba(54, 215, 255, .1), transparent 34%);
  transform: translateX(-100%);
  animation: shine 7s ease-in-out infinite;
}

.contact-map img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  object-position: center;
}

.contact-qr {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 14px;
  background: rgba(255,255,255,.055);
  border: 1px solid rgba(54, 215, 255, .18);
  border-radius: 8px;
}

.contact-qr img {
  width: 92px;
  height: 92px;
  padding: 6px;
  object-fit: contain;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 12px 28px rgba(0, 0, 0, .22);
}

.contact-qr span {
  color: var(--white);
  font-weight: 800;
  line-height: 1.45;
}

.float-call {
  position: fixed;
  z-index: 30;
  right: 20px;
  bottom: 20px;
  display: grid;
  gap: 2px;
  padding: 12px 16px;
  color: #04111c;
  background: linear-gradient(135deg, var(--cyan), var(--teal));
  border-radius: 8px;
  box-shadow: 0 18px 48px rgba(34, 224, 189, .28);
}

.float-call span {
  font-size: 12px;
  font-weight: 700;
}

.float-call b {
  font-size: 16px;
}

@keyframes slowZoom {
  from { transform: scale(1.02); }
  to { transform: scale(1.08); }
}

@keyframes scanMove {
  from { background-position: 0 0; }
  to { background-position: 260px 0; }
}

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

@keyframes shine {
  0%, 45% { transform: translateX(-110%); }
  75%, 100% { transform: translateX(110%); }
}

@keyframes barPulse {
  from { transform: scaleY(.72); opacity: .72; }
  to { transform: scaleY(1); opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    scroll-behavior: auto !important;
    transition: none !important;
  }
}

@media (max-width: 980px) {
  .site-header {
    align-items: flex-start;
  }

  .nav {
    display: none;
  }

  .hero {
    padding-top: 112px;
  }

  .hero-inner,
  .growth,
  .advantage-layout,
  .contact-card,
  .case-feature,
  .case-feature.reverse {
    grid-template-columns: 1fr;
  }

  .case-feature.reverse .case-image {
    order: 0;
  }

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

  .contact-actions {
    justify-content: stretch;
    max-width: none;
  }

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

  .contact-map img {
    aspect-ratio: 16 / 9;
  }
}

@media (max-width: 640px) {
  .site-header {
    gap: 12px;
    padding-inline: 14px;
  }

  .brand small {
    display: none;
  }

  .header-call {
    padding: 9px 10px;
    font-size: 12px;
  }

  .hero {
    min-height: auto;
    padding-bottom: 54px;
  }

  .hero h1 {
    font-size: 64px;
  }

  .hero-lead {
    font-size: clamp(22px, 6vw, 26px);
  }

  .hero-text {
    font-size: 15px;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-panel {
    padding: 18px;
  }

  .console-metric strong {
    font-size: 28px;
  }

  .console-metric span {
    font-size: 19px;
  }

  .panel-grid,
  .trust-grid,
  .service-grid,
  .advantage-list,
  .case-grid.compact,
  .case-content dl {
    grid-template-columns: 1fr;
  }

  .section {
    padding-top: 68px;
    padding-bottom: 68px;
  }

  .section h2,
  .growth-copy h2 {
    font-size: 32px;
  }

  .growth-visual img {
    height: 260px;
  }

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

  .case-image {
    min-height: 230px;
  }

  .case-image img {
    object-fit: contain;
    background: #fff;
  }

  .contact-card {
    padding: 22px;
  }

  .contact-actions {
    padding: 14px;
  }

  .contact-map img {
    aspect-ratio: 4 / 3;
  }

  .float-call {
    left: 14px;
    right: 14px;
    bottom: 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
}