:root {
  --navy: #073d73;
  --blue: #0799d4;
  --blue-soft: #eaf7fd;
  --gold: #c7a76a;
  --ink: #182b3d;
  --muted: #637486;
  --line: #d9e8f0;
  --white: #ffffff;
  --bg: #f6fbfe;
  --orange: #f07d38;
  --shadow-card: 0 18px 44px rgba(7, 61, 115, 0.08);
  --shadow-lift: 0 24px 58px rgba(7, 61, 115, 0.14);
  --heading-font:
    "Microsoft YaHei UI",
    "Microsoft YaHei",
    "PingFang SC",
    "HarmonyOS Sans SC",
    Arial,
    sans-serif;
  --body-font:
    "HarmonyOS Sans SC",
    "MiSans",
    "Microsoft YaHei",
    "PingFang SC",
    Arial,
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

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

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--body-font);
  background: var(--bg);
  overflow-x: hidden;
}

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

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

button {
  font: inherit;
}

@keyframes titleRise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes titleLine {
  from {
    opacity: 0;
    transform: scaleX(0);
  }

  to {
    opacity: 1;
    transform: scaleX(1);
  }
}

.reveal-on-scroll {
  opacity: 0;
  filter: blur(10px);
  transform: translate3d(0, 28px, 0);
  transition:
    opacity 0.85s cubic-bezier(0.22, 1, 0.36, 1),
    filter 0.85s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.85s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, filter, transform;
}

.reveal-on-scroll[data-reveal="left"] {
  transform: translate3d(-28px, 0, 0);
}

.reveal-on-scroll[data-reveal="right"] {
  transform: translate3d(28px, 0, 0);
}

.reveal-on-scroll.is-visible {
  opacity: 1;
  filter: blur(0);
  transform: translate3d(0, 0, 0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 1px 0 rgba(7, 61, 115, 0.02);
  backdrop-filter: blur(16px);
  transition: box-shadow 0.24s ease, background 0.24s ease;
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.97);
  box-shadow: 0 12px 34px rgba(7, 61, 115, 0.09);
}

.brand {
  display: block;
  width: min(420px, 48vw);
}

.brand img {
  width: 100%;
  height: auto;
}

.nav {
  display: flex;
  gap: 26px;
  color: #42566a;
  font-size: 15px;
}

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

.header-call,
.primary-btn,
.secondary-btn,
.worker-btn {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  font-weight: 800;
  white-space: nowrap;
  transition:
    color 0.2s ease,
    background 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    transform 0.2s ease;
}

.header-call,
.primary-btn {
  color: var(--white);
  background: var(--navy);
}

.header-call {
  gap: 8px;
  padding: 0 18px;
  font-family: Arial, "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.header-call::before {
  content: "☎";
  font-size: 15px;
  line-height: 1;
}

.hero {
  position: relative;
  display: grid;
  min-height: calc(100dvh - 74px);
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.46fr);
  gap: clamp(34px, 6vw, 82px);
  align-items: center;
  padding: clamp(58px, 8vw, 108px) clamp(18px, 6vw, 92px);
  background:
    radial-gradient(circle at 86% 12%, rgba(7, 153, 212, 0.18), transparent 31%),
    linear-gradient(135deg, #ffffff 0%, #f2fbff 52%, #d6f1fb 100%);
}

.scroll-sentinel,
.back-top-sentinel {
  position: absolute;
  left: 0;
  width: 1px;
  height: 1px;
  pointer-events: none;
}

.scroll-sentinel {
  top: 0;
}

.back-top-sentinel {
  top: 85dvh;
}

.eyebrow,
.section-head p,
.office-copy p,
.contact-copy p {
  margin: 0 0 14px;
  color: var(--orange);
  font-size: 14px;
  font-weight: 900;
}

.hero h1 {
  position: relative;
  display: inline-block;
  max-width: 860px;
  margin: 0;
  color: var(--navy);
  font-family: var(--heading-font);
  font-weight: 900;
  font-size: clamp(42px, 4.8vw, 66px);
  line-height: 1.12;
  letter-spacing: 0;
  text-shadow: 0 18px 44px rgba(7, 61, 115, 0.08);
  animation: titleRise 0.8s ease both;
}

.hero h1 span {
  display: block;
}

.hero h1::after {
  display: block;
  width: 132px;
  height: 2px;
  margin-top: 22px;
  content: "";
  background: linear-gradient(90deg, var(--gold), rgba(199, 167, 106, 0));
  transform-origin: left;
  animation: titleLine 0.9s ease 0.18s both;
}

.lead {
  max-width: 720px;
  margin: 26px 0 0;
  color: #40566c;
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.primary-btn,
.secondary-btn,
.worker-btn {
  padding: 0 24px;
}

.secondary-btn {
  color: var(--navy);
  border: 1px solid rgba(7, 61, 115, 0.22);
  background: rgba(255, 255, 255, 0.68);
}

.primary-btn:hover,
.header-call:hover,
.primary-btn:focus-visible,
.header-call:focus-visible {
  background: #042f5b;
  box-shadow: 0 12px 28px rgba(7, 61, 115, 0.18);
  outline: none;
}

.secondary-btn:hover,
.secondary-btn:focus-visible {
  border-color: rgba(7, 61, 115, 0.34);
  background: rgba(255, 255, 255, 0.92);
  outline: none;
}

.worker-btn {
  color: var(--navy);
  border: 1px solid rgba(7, 153, 212, 0.24);
  background: rgba(234, 247, 253, 0.88);
}

.worker-btn:hover,
.worker-btn:focus-visible {
  color: var(--white);
  background: var(--blue);
  outline: none;
}

.header-call:active,
.primary-btn:active,
.secondary-btn:active,
.worker-btn:active,
.back-to-top:active {
  transform: translateY(1px) scale(0.99);
}

.hero-card {
  position: relative;
  margin: 0;
  padding: 28px;
  border: 1px solid rgba(7, 61, 115, 0.12);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow-lift);
}

.hero-card img {
  width: 92px;
  margin-bottom: 24px;
  border-radius: 50%;
}

.hero-card span {
  display: block;
  color: var(--blue);
  font-weight: 900;
}

.hero-card h2 {
  margin: 10px 0 12px;
  color: var(--navy);
  font-size: 28px;
  line-height: 1.25;
}

.hero-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.metrics article {
  padding: 32px 20px;
  text-align: center;
  border-right: 1px solid var(--line);
}

.metrics article:last-child {
  border-right: 0;
}

.metrics strong {
  display: block;
  color: var(--blue);
  font-size: clamp(31px, 4vw, 48px);
  line-height: 1;
}

.metrics span {
  display: block;
  margin-top: 10px;
  color: var(--muted);
}

.section {
  padding: clamp(58px, 8vw, 104px) clamp(18px, 6vw, 92px);
}

.section-head {
  max-width: 790px;
  margin-bottom: 36px;
}

.section-head h2,
.office-copy h2,
.contact-copy h2 {
  position: relative;
  display: inline-block;
  margin: 0;
  color: var(--navy);
  font-family: var(--heading-font);
  font-weight: 900;
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.15;
  letter-spacing: 0;
  text-wrap: balance;
  text-shadow: 0 14px 34px rgba(7, 61, 115, 0.06);
  animation: titleRise 0.7s ease both;
}

.section-head h2::after,
.qualification-copy h2::after,
.office-copy h2::after,
.xiangpin-copy h2::after,
.contact-copy h2::after {
  display: block;
  width: 86px;
  height: 2px;
  margin-top: 16px;
  content: "";
  background: linear-gradient(90deg, var(--gold), rgba(199, 167, 106, 0));
  transform-origin: left;
  animation: titleLine 0.8s ease 0.12s both;
}

.section-head span,
.office-copy > span,
.contact-copy span {
  display: block;
  margin-top: 16px;
  color: var(--muted);
  line-height: 1.8;
}

.services-section,
.process-section {
  background: var(--white);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.service-grid article,
.strength-copy article,
.qualification-card,
.process-grid article {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fbfdff;
  transition:
    border-color 0.24s ease,
    box-shadow 0.24s ease,
    transform 0.24s ease;
}

.service-grid article {
  min-height: 260px;
  padding: 26px;
}

.service-grid article > span {
  color: var(--orange);
  font-weight: 900;
}

.service-grid h3,
.strength-copy h3,
.process-grid h3 {
  margin: 18px 0 12px;
  color: var(--navy);
  font-size: 24px;
}

.service-grid p,
.strength-copy p,
.qualification-card span,
.process-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.78;
}

.strength-section,
.clients-section {
  background: var(--bg);
}

.strength-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.44fr);
  gap: 18px;
}

.strength-copy {
  display: grid;
  gap: 14px;
}

.strength-copy article {
  padding: 24px;
}

.strength-copy h3 {
  margin-top: 0;
}

.qualification-card {
  display: flex;
  min-height: 100%;
  flex-direction: column;
  justify-content: end;
  padding: 28px;
  color: var(--white);
  background: linear-gradient(145deg, var(--navy), var(--blue));
}

.qualification-card p {
  margin: 0 0 16px;
  color: rgba(255, 255, 255, 0.72);
  font-weight: 900;
}

.qualification-card h3 {
  margin: 0 0 16px;
  font-size: 30px;
  line-height: 1.3;
}

.qualification-card span {
  color: rgba(255, 255, 255, 0.76);
}

.qualification-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.42fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
  background: var(--white);
}

.qualification-copy p {
  margin: 0 0 14px;
  color: var(--orange);
  font-size: 14px;
  font-weight: 900;
}

.qualification-copy h2 {
  position: relative;
  display: inline-block;
  margin: 0;
  color: var(--navy);
  font-family: var(--heading-font);
  font-weight: 900;
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.15;
  letter-spacing: 0;
  text-wrap: balance;
  text-shadow: 0 14px 34px rgba(7, 61, 115, 0.06);
  animation: titleRise 0.7s ease both;
}

.qualification-copy > span {
  display: block;
  margin-top: 16px;
  color: var(--muted);
  line-height: 1.85;
}

.qualification-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.qualification-list span {
  display: inline-flex;
  min-height: 36px;
  align-items: center;
  padding: 0 13px;
  color: var(--navy);
  font-size: 14px;
  font-weight: 900;
  border: 1px solid rgba(7, 61, 115, 0.12);
  border-radius: 999px;
  background: #f7fbfd;
}

.qualification-proof {
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(7, 61, 115, 0.12);
  border-radius: 8px;
  background: #f7fbfd;
  box-shadow: 0 24px 58px rgba(7, 61, 115, 0.12);
}

.qualification-proof img {
  width: 100%;
  height: auto;
}

.client-wall {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.client-logo-card {
  display: flex;
  min-height: 146px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 22px 18px 18px;
  border: 1px solid rgba(7, 61, 115, 0.09);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow-card);
  transition:
    border-color 0.24s ease,
    box-shadow 0.24s ease,
    transform 0.24s ease;
}

@media (hover: hover) {
  .service-grid article:hover,
  .strength-copy article:hover,
  .process-grid article:hover,
  .client-logo-card:hover {
    border-color: rgba(7, 153, 212, 0.24);
    box-shadow: var(--shadow-lift);
    transform: translateY(-3px);
  }
}

.client-logo-card img {
  width: auto;
  height: auto;
  max-width: min(190px, 100%);
  max-height: 82px;
  object-fit: contain;
}

.client-logo-card span {
  color: #52677a;
  font-size: 14px;
  font-weight: 800;
  line-height: 1.35;
  text-align: center;
}

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

.process-grid article {
  min-height: 220px;
  padding: 24px;
}

.process-grid article > span {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  color: var(--white);
  font-weight: 900;
  border-radius: 50%;
  background: var(--navy);
}

.office-section {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  background: var(--white);
}

.office-copy {
  display: grid;
  grid-template-columns: minmax(260px, 0.35fr) minmax(0, 0.65fr);
  gap: 28px;
  align-items: end;
  max-width: none;
}

.office-copy span {
  max-width: 720px;
}

.office-gallery {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.office-gallery figure {
  position: relative;
  min-height: 236px;
  margin: 0;
  overflow: hidden;
  border-radius: 8px;
  background: #edf4f8;
  box-shadow: 0 18px 42px rgba(7, 61, 115, 0.12);
}

.office-gallery .office-feature {
  grid-column: 1 / -1;
  width: 100%;
  aspect-ratio: 2.18 / 1;
  min-height: auto;
}

.office-gallery img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.office-feature img {
  height: 100%;
  object-fit: cover;
  background: #f7f9fa;
}

.office-gallery figcaption {
  position: absolute;
  left: 14px;
  bottom: 14px;
  padding: 8px 12px;
  color: var(--white);
  font-size: 14px;
  font-weight: 900;
  border-radius: 999px;
  background: rgba(5, 56, 97, 0.82);
  backdrop-filter: blur(10px);
}

.xiangpin-section {
  color: var(--ink);
  padding-top: clamp(132px, 12vw, 168px);
  background:
    linear-gradient(180deg, #ffffff 0%, #f8fbfd 58%, #ffffff 100%);
}

.xiangpin-copy {
  display: grid;
  grid-template-columns: minmax(260px, 0.36fr) minmax(0, 0.64fr);
  gap: 28px;
  align-items: end;
  margin-bottom: 34px;
}

.xiangpin-copy p {
  margin: 0 0 14px;
  color: #f6a15f;
  font-size: 14px;
  font-weight: 900;
}

.xiangpin-copy h2 {
  position: relative;
  display: inline-block;
  margin: 0;
  color: var(--navy);
  font-family: var(--heading-font);
  font-weight: 900;
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.15;
  letter-spacing: 0;
  text-wrap: balance;
  text-shadow: 0 14px 34px rgba(7, 61, 115, 0.06);
  animation: titleRise 0.7s ease both;
}

.xiangpin-copy span {
  display: block;
  max-width: 760px;
  color: var(--muted);
  line-height: 1.85;
}

.xiangpin-copy h2::after,
.contact-copy h2::after {
  background: linear-gradient(90deg, #e0bf7b, rgba(224, 191, 123, 0));
}

.xiangpin-copy h2::after {
  display: none;
  content: none;
}

@media (prefers-reduced-motion: reduce) {
  .hero h1,
  .section-head h2,
  .qualification-copy h2,
  .office-copy h2,
  .xiangpin-copy h2,
  .contact-copy h2,
  .hero h1::after,
  .section-head h2::after,
  .qualification-copy h2::after,
  .office-copy h2::after,
  .xiangpin-copy h2::after,
  .contact-copy h2::after {
    animation: none;
  }

  .reveal-on-scroll {
    opacity: 1;
    filter: none;
    transform: none;
    transition: none;
  }
}

.xiangpin-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.42fr) minmax(0, 1fr);
  gap: clamp(20px, 4vw, 44px);
  align-items: center;
}

.xiangpin-phone {
  max-width: 360px;
  margin: 0 auto;
  overflow: hidden;
  border-radius: 22px;
  background: transparent;
  box-shadow: 0 26px 62px rgba(7, 61, 115, 0.13);
}

.xiangpin-phone img {
  display: block;
  width: 100%;
  height: auto;
}

.xiangpin-qr-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.xiangpin-qr-grid article {
  padding: clamp(6px, 1.2vw, 10px) 0 0;
  border-top: 0 !important;
}

.xiangpin-qr-grid img {
  width: min(100%, 280px);
  margin: 0;
  border: 10px solid var(--white);
  border-radius: 10px;
  background: var(--white);
  box-shadow: 0 20px 46px rgba(7, 61, 115, 0.1);
}

.xiangpin-qr-grid h3 {
  margin: 18px 0 8px;
  color: var(--navy);
  font-size: 24px;
}

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

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(330px, 0.5fr);
  gap: 34px;
  align-items: center;
  padding: clamp(58px, 8vw, 104px) clamp(18px, 6vw, 92px);
  color: var(--white);
  background: #053861;
}

.contact-copy h2,
.contact-copy span {
  color: var(--white);
}

.contact-copy span {
  color: rgba(255, 255, 255, 0.78);
}

.phone-list {
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.phone-list article {
  display: grid;
  grid-template-columns: 92px 54px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  padding: 18px 0;
  color: var(--white);
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.phone-list small {
  color: rgba(255, 255, 255, 0.58);
  font-weight: 900;
}

.phone-list span {
  color: rgba(255, 255, 255, 0.82);
  font-weight: 900;
}

.phone-copy {
  width: fit-content;
  padding: 0;
  color: var(--white);
  cursor: pointer;
  border: 0;
  background: transparent;
  font-size: clamp(22px, 2.3vw, 30px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 0;
  text-align: left;
  white-space: nowrap;
}

.phone-copy:hover,
.phone-copy:focus-visible {
  color: #ffb37d;
  outline: none;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 24px clamp(18px, 6vw, 92px);
  color: #d9eff9;
  background: #042a48;
}

.toast {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 30;
  padding: 12px 16px;
  color: var(--white);
  pointer-events: none;
  opacity: 0;
  border-radius: 6px;
  background: rgba(24, 43, 61, 0.94);
  transform: translateY(10px);
  transition:
    opacity 0.2s ease,
    transform 0.2s ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top {
  position: fixed;
  right: 22px;
  bottom: 82px;
  z-index: 28;
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  color: var(--white);
  cursor: pointer;
  pointer-events: none;
  opacity: 0;
  border: 1px solid rgba(255, 255, 255, 0.46);
  border-radius: 50%;
  background: rgba(7, 61, 115, 0.82);
  box-shadow: 0 18px 42px rgba(7, 61, 115, 0.2);
  backdrop-filter: blur(12px);
  transform: translateY(12px) scale(0.96);
  transition:
    opacity 0.28s ease,
    transform 0.28s ease,
    background 0.2s ease;
}

.back-to-top.is-visible {
  pointer-events: auto;
  opacity: 1;
  transform: translateY(0) scale(1);
}

.back-to-top:hover,
.back-to-top:focus-visible {
  background: rgba(7, 153, 212, 0.92);
  outline: none;
}

@media (max-width: 1060px) {
  .nav {
    display: none;
  }

  .hero,
  .strength-layout,
  .qualification-section,
  .xiangpin-layout,
  .contact-section,
  .office-section {
    grid-template-columns: 1fr;
  }

  .xiangpin-copy {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

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

  .office-gallery {
    grid-template-columns: 1fr 1fr;
  }

  .office-copy {
    grid-template-columns: 1fr;
  }

  .office-gallery .office-feature {
    grid-column: 1 / -1;
    aspect-ratio: 2.18 / 1;
  }

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

@media (max-width: 680px) {
  .site-header {
    padding: 12px 16px;
  }

  .brand {
    width: min(250px, 58vw);
  }

  .header-call {
    padding: 0 12px;
    font-size: 13px;
    letter-spacing: 0;
  }

  .header-call::before {
    font-size: 13px;
  }

  .hero-actions,
  .metrics,
  .service-grid,
  .process-grid {
    display: grid;
    grid-template-columns: 1fr;
  }

  .client-wall {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .client-logo-card {
    min-height: 132px;
    gap: 12px;
    padding: 18px 12px 14px;
  }

  .client-logo-card span {
    font-size: 13px;
  }

  .office-gallery {
    grid-template-columns: 1fr;
  }

  .office-gallery figure,
  .office-gallery .office-feature {
    min-height: 240px;
  }

  .xiangpin-qr-grid {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
  }

  .xiangpin-phone {
    max-width: 300px;
  }

  .xiangpin-copy,
  .xiangpin-layout,
  .xiangpin-qr-grid article {
    justify-items: center;
    text-align: center;
  }

  .xiangpin-copy span,
  .xiangpin-qr-grid p {
    max-width: 320px;
    margin-right: auto;
    margin-left: auto;
  }

  .xiangpin-qr-grid img {
    margin-right: auto;
    margin-left: auto;
  }

  .phone-list article {
    grid-template-columns: 1fr;
  }

  .back-to-top {
    right: 16px;
    bottom: 20px;
    width: 40px;
    height: 40px;
  }

  footer {
    flex-direction: column;
  }
}