:root {
  color-scheme: light;
  --bg: #edf7ff;
  --surface: #ffffff;
  --ink: #102033;
  --muted: #5d6f82;
  --line: #cfe0f1;
  --teal: #1677ff;
  --teal-dark: #0b4f9c;
  --amber: #38bdf8;
  --soft-blue: #eaf3ff;
  --deep: #071a2f;
  --panel: rgba(255, 255, 255, 0.72);
  --grid-line: rgba(22, 119, 255, 0.08);
  --shadow: 0 24px 70px rgba(15, 46, 82, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
  overflow-x: hidden;
}

body {
  margin: 0;
  font-family:
    "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial,
    sans-serif;
  background:
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px) 0 0 / 44px 44px,
    linear-gradient(var(--grid-line) 1px, transparent 1px) 0 0 / 44px 44px,
    linear-gradient(180deg, #eef8ff 0%, #f8fbff 46%, #eaf5ff 100%);
  color: var(--ink);
  letter-spacing: 0;
  overflow-x: hidden;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 0 6vw;
  overflow: visible;
  background: rgba(239, 248, 255, 0.76);
  border-bottom: 1px solid rgba(98, 169, 255, 0.18);
  box-shadow: 0 10px 34px rgba(20, 77, 135, 0.08);
  backdrop-filter: blur(18px) saturate(1.25);
}

.brand,
.nav,
.hero-actions,
.quick-facts,
.service-tabs,
.timeline,
.footer {
  display: flex;
  align-items: center;
}

.brand {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  height: 56px;
  max-width: 190px;
  overflow: hidden;
}

.brand-logo {
  display: block;
  width: auto;
  height: 34px;
  max-width: 100%;
  object-fit: contain;
}

section[id],
article[id],
main[id] {
  scroll-margin-top: 88px;
}

.nav {
  gap: 28px;
  color: var(--muted);
  font-size: 15px;
}

.nav a,
.nav-button,
.language-toggle button,
.header-action {
  transition:
    color 180ms ease,
    border-color 180ms ease,
    background 180ms ease;
}

.nav a:hover,
.nav-button:hover {
  color: var(--ink);
}

.nav-item {
  position: relative;
}

.nav-button {
  padding: 0;
  color: inherit;
  font: inherit;
  background: transparent;
  border: 0;
  cursor: pointer;
}

.dropdown {
  position: absolute;
  top: 32px;
  left: 50%;
  display: grid;
  min-width: 150px;
  padding: 8px;
  visibility: hidden;
  opacity: 0;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(80, 161, 255, 0.2);
  border-radius: 8px;
  box-shadow: 0 18px 44px rgba(15, 46, 82, 0.14);
  transform: translate(-50%, 6px);
  transition:
    opacity 160ms ease,
    transform 160ms ease,
    visibility 160ms ease;
}

.dropdown a {
  padding: 10px 12px;
  border-radius: 6px;
  white-space: nowrap;
}

.dropdown a:hover {
  background: var(--soft-blue);
}

.has-menu:hover .dropdown,
.has-menu.is-open .dropdown {
  visibility: visible;
  opacity: 1;
  transform: translate(-50%, 0);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

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

.language-toggle {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 3px;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(80, 161, 255, 0.24);
  border-radius: 8px;
}

.language-toggle button {
  min-width: 44px;
  height: 34px;
  padding: 0 10px;
  color: var(--muted);
  font: inherit;
  font-size: 13px;
  font-weight: 800;
  background: transparent;
  border: 0;
  border-radius: 6px;
  cursor: pointer;
}

.language-toggle button.is-active,
.language-toggle button[aria-pressed="true"] {
  color: #fff;
  background: var(--teal-dark);
}

.language-toggle button[aria-pressed="false"] {
  color: var(--muted);
  background: transparent;
}

.header-action {
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 700;
  color: var(--teal-dark);
  background: rgba(255, 255, 255, 0.7);
}

.header-action:hover {
  border-color: var(--teal);
  background: #fff;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(480px, 1.2fr);
  gap: 48px;
  align-items: center;
  min-height: calc(88vh - 72px);
  padding: 52px 6vw 42px;
}

.hero::before {
  position: absolute;
  inset: 0;
  z-index: -1;
  content: "";
  background:
    radial-gradient(circle at 78% 18%, rgba(56, 189, 248, 0.18), transparent 34%),
    linear-gradient(115deg, transparent 0 42%, rgba(22, 119, 255, 0.07) 42% 43%, transparent 43% 100%);
  pointer-events: none;
}

.hero-copy {
  position: relative;
  min-width: 0;
  max-width: 100%;
}

.hero-copy::before {
  display: block;
  width: 72px;
  height: 3px;
  margin-bottom: 24px;
  content: "";
  background: linear-gradient(90deg, var(--teal), var(--amber));
  border-radius: 999px;
  box-shadow: 0 0 18px rgba(56, 189, 248, 0.55);
}

.eyebrow,
.section-kicker,
.service-label {
  margin: 0 0 14px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 24px;
  font-size: clamp(42px, 4vw, 58px);
  line-height: 1.06;
  letter-spacing: 0;
  white-space: nowrap;
}

h2 {
  font-size: clamp(30px, 3.2vw, 48px);
  line-height: 1.16;
  letter-spacing: 0;
}

h3 {
  font-size: 21px;
  line-height: 1.28;
}

.lead {
  max-width: 650px;
  color: var(--muted);
  font-size: 20px;
  line-height: 1.8;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 14px;
  margin: 30px 0 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 800;
  cursor: pointer;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background 180ms ease;
}

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

.button.primary {
  color: #fff;
  background: linear-gradient(135deg, #0b56b3, #1681ff);
  box-shadow:
    0 14px 28px rgba(22, 119, 255, 0.24),
    inset 0 1px 0 rgba(255, 255, 255, 0.22);
}

.button.secondary {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.74);
  border-color: rgba(80, 161, 255, 0.22);
}

.quick-facts {
  flex-wrap: wrap;
  gap: 14px;
}

.quick-facts div {
  min-width: 142px;
  padding: 15px 18px;
  background: var(--panel);
  border: 1px solid rgba(80, 161, 255, 0.2);
  border-radius: 8px;
  box-shadow: 0 12px 34px rgba(15, 76, 129, 0.08);
  backdrop-filter: blur(12px);
}

.quick-facts dt {
  color: var(--muted);
  font-size: 13px;
}

.quick-facts dd {
  margin: 7px 0 0;
  font-weight: 800;
}

.hero-visual {
  position: relative;
  overflow: hidden;
  min-height: 420px;
  border: 1px solid rgba(80, 161, 255, 0.28);
  border-radius: 12px;
  background: var(--surface);
  box-shadow:
    0 28px 78px rgba(23, 91, 170, 0.2),
    0 0 0 1px rgba(255, 255, 255, 0.72) inset;
}

.hero-visual::after {
  position: absolute;
  inset: 0;
  z-index: 3;
  content: "";
  background: linear-gradient(115deg, transparent 0 44%, rgba(255, 255, 255, 0.34) 48%, transparent 53%);
  opacity: 0.45;
  transform: translateX(-45%);
  animation: scan-sheen 7s ease-in-out infinite;
  pointer-events: none;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  min-height: 420px;
  object-fit: cover;
  object-position: center;
}

.service-strip,
.advantages,
.contact {
  padding: 84px 6vw;
  border-top: 1px solid var(--line);
}

.service-strip {
  background:
    linear-gradient(90deg, rgba(22, 119, 255, 0.05) 1px, transparent 1px) 0 0 / 40px 40px,
    linear-gradient(#fff, #fff);
}

.service-strip h2 {
  max-width: 920px;
}

.service-tabs {
  flex-wrap: wrap;
  gap: 10px;
  margin: 30px 0 22px;
}

.tab {
  min-height: 42px;
  padding: 0 16px;
  color: var(--muted);
  background: rgba(234, 243, 255, 0.88);
  border: 1px solid rgba(80, 161, 255, 0.2);
  border-radius: 8px;
  cursor: pointer;
}

.tab.is-active {
  color: #fff;
  background: linear-gradient(135deg, #0b56b3, #1681ff);
  border-color: rgba(22, 119, 255, 0.48);
}

.service-card {
  max-width: 900px;
  padding: 30px;
  background: rgba(247, 251, 255, 0.86);
  border: 1px solid rgba(80, 161, 255, 0.22);
  border-radius: 10px;
  box-shadow: 0 18px 50px rgba(15, 76, 129, 0.08);
  backdrop-filter: blur(12px);
}

.service-card p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

.service-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  padding: 0;
  margin: 24px 0 0;
  list-style: none;
}

.service-points li {
  padding: 12px 14px;
  color: var(--teal-dark);
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(80, 161, 255, 0.2);
  border-radius: 8px;
  font-weight: 800;
}

.service-details {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  padding: 32px 6vw 84px;
  background:
    linear-gradient(180deg, #fff 0%, #f7fbff 100%);
}

.service-details article {
  position: relative;
  overflow: hidden;
  padding: 24px;
  background: rgba(247, 251, 255, 0.9);
  border: 1px solid rgba(80, 161, 255, 0.2);
  border-radius: 10px;
  box-shadow: 0 14px 36px rgba(15, 76, 129, 0.06);
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease;
}

.service-details article::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  content: "";
  background: linear-gradient(90deg, var(--teal), transparent);
}

.service-details article:hover {
  border-color: rgba(22, 119, 255, 0.42);
  box-shadow: 0 20px 54px rgba(15, 76, 129, 0.12);
  transform: translateY(-3px);
}

.service-details span,
.service-details a,
.step span {
  color: var(--amber);
  font-weight: 900;
}

.service-details p {
  color: var(--muted);
  line-height: 1.7;
}

.service-details a {
  display: inline-flex;
  margin-top: 8px;
  color: var(--teal-dark);
}

.process {
  padding: 84px 6vw;
  border-top: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(22, 119, 255, 0.04), rgba(56, 189, 248, 0.08)),
    linear-gradient(90deg, rgba(22, 119, 255, 0.07) 1px, transparent 1px) 0 0 / 42px 42px,
    var(--bg);
}

.process h2 {
  max-width: 820px;
}

.timeline {
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 18px;
}

.step {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 46px;
  padding: 0 16px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(80, 161, 255, 0.22);
  border-radius: 8px;
  cursor: pointer;
}

.step.is-active {
  color: #fff;
  background: linear-gradient(135deg, #0b56b3, #1681ff);
  border-color: rgba(22, 119, 255, 0.48);
}

.step.is-active span {
  color: #fff;
}

.process-panel {
  max-width: 900px;
  padding: 28px;
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid rgba(80, 161, 255, 0.22);
  border-radius: 10px;
  box-shadow: 0 18px 50px rgba(15, 76, 129, 0.08);
  backdrop-filter: blur(12px);
}

.process-panel p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

.advantages {
  display: grid;
  grid-template-columns: minmax(240px, 0.78fr) minmax(0, 1.22fr);
  gap: 56px;
  background:
    linear-gradient(180deg, #edf7ff 0%, #f8fbff 100%);
}

.advantage-grid {
  display: grid;
  gap: 16px;
}

.advantage-grid article {
  position: relative;
  padding: 24px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(80, 161, 255, 0.2);
  border-radius: 10px;
  box-shadow: 0 14px 36px rgba(15, 76, 129, 0.06);
}

.advantage-grid span {
  color: var(--amber);
  font-weight: 900;
}

.advantage-grid p,
.contact-copy p {
  color: var(--muted);
  line-height: 1.75;
}

.contact {
  display: grid;
  grid-template-columns: minmax(260px, 0.85fr) minmax(300px, 0.72fr);
  gap: 56px;
  background:
    linear-gradient(90deg, rgba(56, 189, 248, 0.08) 1px, transparent 1px) 0 0 / 44px 44px,
    linear-gradient(rgba(56, 189, 248, 0.06) 1px, transparent 1px) 0 0 / 44px 44px,
    radial-gradient(circle at 76% 18%, rgba(22, 119, 255, 0.18), transparent 34%),
    var(--deep);
  color: #f7fbff;
}

.contact .section-kicker {
  color: #7dd3fc;
}

.contact-copy p {
  color: #c4d5e6;
  font-size: 17px;
}

.contact-list {
  display: grid;
  gap: 12px;
  margin-top: 28px;
  font-style: normal;
}

.contact-list a {
  display: grid;
  gap: 5px;
  padding: 16px 18px;
  color: #f7fbff;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(125, 211, 252, 0.2);
  border-radius: 8px;
}

.contact-list span {
  color: #7dd3fc;
  font-size: 13px;
  font-weight: 800;
}

.wechat-card {
  display: grid;
  justify-items: center;
  justify-self: end;
  align-self: start;
  width: min(100%, 340px);
  padding: 0;
  color: #f7fbff;
  background: transparent;
  border-radius: 8px;
  text-align: center;
}

.wechat-qr {
  width: min(100%, 300px);
  height: auto;
  background: #fff;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  box-shadow:
    0 22px 48px rgba(0, 0, 0, 0.24),
    0 0 34px rgba(56, 189, 248, 0.16);
}

.button:focus-visible,
.tab:focus-visible,
.step:focus-visible,
.menu-toggle:focus-visible,
.language-toggle button:focus-visible,
.nav-button:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(56, 189, 248, 0.42);
  outline-offset: 3px;
}

.footer {
  justify-content: space-between;
  gap: 20px;
  padding: 28px 6vw;
  color: var(--muted);
  background: #04111f;
  border-top: 1px solid rgba(215, 227, 238, 0.14);
}

.back-to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 9;
  width: 44px;
  height: 44px;
  visibility: hidden;
  opacity: 0;
  color: #fff;
  background: var(--teal-dark);
  border: 0;
  border-radius: 8px;
  box-shadow: 0 14px 34px rgba(15, 46, 82, 0.2);
  cursor: pointer;
  transition:
    opacity 180ms ease,
    visibility 180ms ease,
    transform 180ms ease;
}

@keyframes scan-sheen {
  0%,
  60% {
    transform: translateX(-55%);
  }

  100% {
    transform: translateX(65%);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hero-visual::after {
    animation: none;
  }

  .button,
  .service-details article,
  .back-to-top {
    transition: none;
  }
}

.back-to-top.is-visible {
  visibility: visible;
  opacity: 1;
}

.back-to-top:hover {
  transform: translateY(-2px);
}

@media (max-width: 900px) {
  .site-header {
    position: sticky;
    min-height: auto;
    padding: 16px 5vw;
    flex-wrap: wrap;
    gap: 12px;
  }

  .brand {
    height: 44px;
    max-width: 146px;
  }

  .brand-logo {
    height: 28px;
  }

  .header-action {
    display: none;
  }

  .language-toggle {
    margin-left: 6px;
  }

  .language-toggle button {
    min-width: 40px;
    height: 32px;
    padding: 0 8px;
  }

  .menu-toggle {
    display: block;
    margin-left: auto;
  }

  .nav {
    display: none;
    order: 3;
    width: 100%;
    gap: 6px;
    align-items: stretch;
    padding-top: 12px;
    color: var(--ink);
  }

  .site-header.menu-open .nav {
    display: grid;
  }

  .nav a,
  .nav-button {
    width: 100%;
    padding: 12px;
    text-align: left;
    background: rgba(255, 255, 255, 0.82);
    border: 1px solid var(--line);
    border-radius: 8px;
  }

  .dropdown {
    position: static;
    min-width: 0;
    margin-top: 6px;
    visibility: visible;
    opacity: 1;
    box-shadow: none;
    transform: none;
  }

  .hero,
  .advantages,
  .contact {
    grid-template-columns: 1fr;
  }

  .wechat-card {
    justify-self: center;
  }

  .hero {
    gap: 36px;
    min-height: auto;
    padding: 46px 5vw 34px;
  }

  h1 {
    font-size: 36px;
    white-space: normal;
  }

  .lead {
    font-size: 18px;
  }

  .hero-visual {
    aspect-ratio: 16 / 10;
    min-height: 0;
  }

  .hero-visual img {
    min-height: 0;
  }

  .service-strip,
  .service-details,
  .process,
  .advantages,
  .contact {
    padding: 62px 5vw;
  }

  .service-details {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding-top: 0;
  }

  .service-points {
    grid-template-columns: 1fr;
  }

  .footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 24px 5vw;
  }
}

@media (max-width: 1100px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    max-width: 760px;
  }

  h1 {
    white-space: normal;
  }

  .hero-visual {
    aspect-ratio: 16 / 9;
    min-height: 0;
  }

  .hero-visual img {
    min-height: 0;
  }
}

@media (max-width: 520px) {
  .site-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto auto;
    align-items: center;
    justify-content: stretch;
    column-gap: 10px;
  }

  .brand {
    min-width: 0;
    max-width: 120px;
  }

  .brand-logo {
    height: 24px;
  }

  .menu-toggle {
    margin-left: 0;
  }

  .language-toggle {
    margin-left: 0;
  }

  .language-toggle button {
    min-width: 34px;
    padding: 0 6px;
  }

  h1 {
    font-size: 32px;
  }

  h2 {
    font-size: 28px;
  }

  .button,
  .hero-actions {
    width: 100%;
  }

  .quick-facts div,
  .tab,
  .step,
  .service-details article {
    width: 100%;
  }

  .service-details {
    grid-template-columns: 1fr;
  }

  .back-to-top {
    display: none;
  }
}