:root {
  --mobile-ink: #162033;
  --mobile-muted: #637189;
  --mobile-bg: #eef4fb;
  --mobile-card: #ffffff;
  --mobile-line: #d7e2ef;
  --mobile-blue: #3a72ff;
  --mobile-green: #20b981;
  --mobile-night: #101829;
  --mobile-warm: #f7b955;
  --mobile-shadow: 0 24px 70px rgba(34, 64, 112, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body.mobile-page {
  margin: 0;
  font-family: "Trebuchet MS", "Microsoft YaHei", sans-serif;
  color: var(--mobile-ink);
  background:
    radial-gradient(circle at 8% 12%, rgba(58, 114, 255, 0.14), transparent 28rem),
    radial-gradient(circle at 92% 26%, rgba(32, 185, 129, 0.12), transparent 24rem),
    linear-gradient(180deg, #eef4fb 0%, #f8fbff 42%, #eef4fb 100%);
  min-height: 100vh;
  padding-bottom: 86px;
  overflow-x: hidden;
}

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

.mobile-header {
  width: min(1180px, calc(100% - 32px));
  position: sticky;
  top: 14px;
  z-index: 20;
  margin: 14px auto 0;
  min-height: 58px;
  padding: 10px 12px 10px 16px;
  border-radius: 22px;
  background: rgba(16, 24, 41, 0.94);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 18px 48px rgba(16, 24, 41, 0.24);
  backdrop-filter: blur(16px);
}

.mobile-header.is-scrolled {
  box-shadow: 0 14px 34px rgba(16, 24, 41, 0.32);
}

.mobile-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.mobile-brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-weight: 900;
  background: linear-gradient(135deg, var(--mobile-green), var(--mobile-blue));
  color: #fff;
  letter-spacing: -0.04em;
}

.mobile-brand strong,
.mobile-brand em {
  display: block;
  font-style: normal;
  line-height: 1.1;
}

.mobile-brand em {
  margin-top: 3px;
  color: #aebbd2;
  font-size: 12px;
  letter-spacing: 0.05em;
}

.mobile-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.mobile-nav a {
  padding: 10px 13px;
  border-radius: 999px;
  color: #dbe5f6;
  font-size: 14px;
}

.mobile-nav a:hover {
  background: rgba(255, 255, 255, 0.09);
  color: #fff;
}

.mobile-nav .mobile-nav-cta {
  color: #0d1727;
  background: #fff;
  font-weight: 800;
}

.mobile-menu {
  display: none;
  border: 0;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  width: 44px;
  height: 40px;
  padding: 0;
}

.mobile-menu span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: #fff;
  border-radius: 999px;
}

.mobile-hero {
  width: min(1180px, calc(100% - 32px));
  margin: 38px auto 0;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(360px, 1.05fr);
  gap: 24px;
  align-items: stretch;
}

.mobile-hero-copy,
.mobile-selector,
.mobile-section,
.mobile-final,
.mobile-footer {
  border: 1px solid rgba(215, 226, 239, 0.9);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--mobile-shadow);
}

.mobile-hero-copy {
  min-height: 610px;
  border-radius: 38px;
  padding: 58px 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.mobile-hero-copy::after {
  content: "";
  position: absolute;
  width: 210px;
  height: 210px;
  right: -70px;
  top: -70px;
  border-radius: 50%;
  border: 34px solid rgba(58, 114, 255, 0.08);
}

.mobile-kicker,
.mobile-section-label,
.mobile-section-head p,
.mobile-final p,
.mobile-rescue-card > p {
  margin: 0 0 12px;
  color: var(--mobile-blue);
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 13px;
}

.mobile-hero h1 {
  position: relative;
  margin: 0;
  max-width: 620px;
  font-size: clamp(44px, 7vw, 86px);
  line-height: 0.98;
  letter-spacing: -0.08em;
}

.mobile-hero h1 span {
  display: block;
}

.mobile-lead {
  position: relative;
  max-width: 560px;
  margin: 26px 0 0;
  color: #425069;
  font-size: 18px;
  line-height: 1.85;
}

.mobile-hero-actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.mobile-primary-btn,
.mobile-secondary-btn,
.mobile-platform-main a,
.mobile-platform-side a,
.mobile-rescue-card a,
.mobile-final-actions a,
.mobile-footer a,
.mobile-choice a,
.mobile-fixed-download a {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 48px;
  border-radius: 999px;
  font-weight: 900;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.mobile-primary-btn:hover,
.mobile-secondary-btn:hover,
.mobile-platform-main a:hover,
.mobile-platform-side a:hover,
.mobile-rescue-card a:hover,
.mobile-final-actions a:hover,
.mobile-footer a:hover,
.mobile-choice a:hover,
.mobile-fixed-download a:hover {
  transform: translateY(-2px);
}

.mobile-primary-btn {
  padding: 0 24px;
  background: var(--mobile-blue);
  color: #fff;
  box-shadow: 0 16px 36px rgba(58, 114, 255, 0.28);
}

.mobile-secondary-btn {
  padding: 0 22px;
  border: 1px solid var(--mobile-line);
  background: #fff;
  color: var(--mobile-ink);
}

.mobile-tip {
  position: relative;
  max-width: 520px;
  margin: 28px 0 0;
  padding: 14px 18px;
  border-left: 4px solid var(--mobile-green);
  background: rgba(32, 185, 129, 0.08);
  border-radius: 16px;
  color: #304057;
  line-height: 1.7;
}

.mobile-selector {
  border-radius: 38px;
  padding: 26px;
  display: grid;
  grid-template-columns: 0.86fr 1.14fr;
  gap: 18px;
  align-items: stretch;
  overflow: hidden;
}

.mobile-device-shell {
  border-radius: 34px;
  padding: 18px;
  background: linear-gradient(160deg, #111a2c, #25324d);
  min-height: 520px;
  position: relative;
  box-shadow: inset 0 0 0 10px rgba(255, 255, 255, 0.04);
}

.mobile-device-shell::before {
  content: "";
  position: absolute;
  top: 12px;
  left: 50%;
  width: 72px;
  height: 7px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.22);
  transform: translateX(-50%);
}

.mobile-screen {
  height: 100%;
  min-height: 474px;
  border-radius: 26px;
  padding: 74px 22px 22px;
  color: #fff;
  background:
    linear-gradient(180deg, rgba(58, 114, 255, 0.18), rgba(32, 185, 129, 0.1)),
    radial-gradient(circle at 60% 10%, rgba(255, 255, 255, 0.24), transparent 7rem),
    #121d31;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.mobile-signal {
  position: absolute;
  z-index: 2;
  top: 34px;
  right: 34px;
  display: flex;
  gap: 3px;
  align-items: flex-end;
}

.mobile-signal i {
  width: 5px;
  border-radius: 999px;
  background: #fff;
  opacity: 0.95;
}

.mobile-signal i:nth-child(1) { height: 8px; }
.mobile-signal i:nth-child(2) { height: 13px; }
.mobile-signal i:nth-child(3) { height: 18px; }
.mobile-signal i:nth-child(4) { height: 23px; background: var(--mobile-green); }

.mobile-detect-label {
  display: inline-flex;
  width: max-content;
  margin-bottom: 14px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  color: #c9d7f6;
  font-size: 12px;
}

.mobile-screen strong {
  font-size: 30px;
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.mobile-screen p {
  color: #c8d5ed;
  line-height: 1.7;
}

.mobile-progress {
  height: 12px;
  margin-top: 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  overflow: hidden;
}

.mobile-progress span {
  display: block;
  width: 62%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--mobile-green), #7dd3fc);
  animation: mobileFill 4s ease-in-out infinite alternate;
}

@keyframes mobileFill {
  from { width: 38%; }
  to { width: 86%; }
}

.mobile-choice-stack {
  display: grid;
  grid-template-rows: 1.35fr 0.65fr;
  gap: 16px;
}

.mobile-choice {
  border-radius: 30px;
  padding: 26px;
  position: relative;
  overflow: hidden;
}

.mobile-choice::after {
  content: "";
  position: absolute;
  width: 116px;
  height: 116px;
  right: -36px;
  bottom: -36px;
  border-radius: 35px;
  transform: rotate(18deg);
  background: rgba(255, 255, 255, 0.16);
}

.mobile-choice h2 {
  margin: 42px 0 12px;
  font-size: 30px;
  letter-spacing: -0.04em;
}

.mobile-choice p {
  margin: 0 0 24px;
  line-height: 1.7;
}

.mobile-choice a {
  position: relative;
  z-index: 1;
  padding: 0 18px;
}

.mobile-choice-android {
  background: linear-gradient(145deg, #1b966b, #20b981);
  color: #fff;
}

.mobile-choice-android a {
  background: #fff;
  color: #147656;
}

.mobile-choice-iphone {
  background: #eef3fb;
  color: var(--mobile-ink);
}

.mobile-choice-iphone a {
  background: var(--mobile-night);
  color: #fff;
}

.mobile-choice-tag {
  position: absolute;
  top: 22px;
  left: 22px;
  padding: 7px 11px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.16);
  font-size: 12px;
  font-weight: 900;
}

.mobile-section,
.mobile-final,
.mobile-footer {
  width: min(1180px, calc(100% - 32px));
  margin: 24px auto 0;
  border-radius: 34px;
  padding: 34px;
}

.mobile-section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 24px;
  margin-bottom: 24px;
}

.mobile-section h2,
.mobile-final h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.05em;
}

.mobile-platform-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 18px;
}

.mobile-platform-main,
.mobile-platform-side article {
  border-radius: 28px;
  padding: 28px;
}

.mobile-platform-main {
  min-height: 330px;
  background:
    linear-gradient(145deg, rgba(58, 114, 255, 0.95), rgba(36, 186, 143, 0.9)),
    var(--mobile-blue);
  color: #fff;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.mobile-platform-main span {
  width: max-content;
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  font-weight: 900;
}

.mobile-platform-main h3 {
  margin: 84px 0 12px;
  font-size: 42px;
  line-height: 1;
  letter-spacing: -0.05em;
}

.mobile-platform-main p,
.mobile-platform-side p,
.mobile-rescue-card p,
.mobile-final p,
.mobile-footer p {
  line-height: 1.75;
}

.mobile-platform-main a {
  width: max-content;
  margin-top: 14px;
  padding: 0 22px;
  background: #fff;
  color: var(--mobile-blue);
}

.mobile-platform-side {
  display: grid;
  gap: 18px;
}

.mobile-platform-side article {
  background: #f3f7fc;
  border: 1px solid var(--mobile-line);
}

.mobile-platform-side h3 {
  margin: 0;
  font-size: 24px;
}

.mobile-platform-side a {
  margin-top: 8px;
  padding: 0 18px;
  background: var(--mobile-night);
  color: #fff;
}

.mobile-detect-panel {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  background: linear-gradient(135deg, #ffffff, #edf5ff);
}

.mobile-detect-panel p:last-child {
  max-width: 760px;
  color: var(--mobile-muted);
  line-height: 1.8;
}

.mobile-detect-actions {
  display: grid;
  gap: 10px;
}

.mobile-detect-actions button {
  border: 1px solid var(--mobile-line);
  min-width: 148px;
  min-height: 44px;
  border-radius: 999px;
  background: #fff;
  color: var(--mobile-ink);
  font-weight: 900;
  cursor: pointer;
}

.mobile-detect-actions button.is-active {
  background: var(--mobile-blue);
  border-color: var(--mobile-blue);
  color: #fff;
}

.mobile-step-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  counter-reset: mobileStep;
}

.mobile-step-list li {
  min-height: 220px;
  padding: 24px;
  border-radius: 26px;
  background: #f7fbff;
  border: 1px solid var(--mobile-line);
  counter-increment: mobileStep;
  position: relative;
}

.mobile-step-list li::before {
  content: counter(mobileStep);
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  margin-bottom: 34px;
  border-radius: 14px;
  background: var(--mobile-night);
  color: #fff;
  font-weight: 900;
}

.mobile-step-list strong,
.mobile-step-list span {
  display: block;
}

.mobile-step-list strong {
  font-size: 21px;
  margin-bottom: 10px;
}

.mobile-step-list span {
  color: var(--mobile-muted);
  line-height: 1.65;
}

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

.mobile-checks article {
  padding: 26px;
  border-radius: 28px;
  background: #fff;
  border: 1px solid var(--mobile-line);
}

.mobile-check-dot {
  display: block;
  width: 46px;
  height: 46px;
  margin-bottom: 28px;
  border-radius: 50%;
  background:
    radial-gradient(circle at center, #fff 0 22%, transparent 24%),
    conic-gradient(var(--mobile-green), var(--mobile-blue), var(--mobile-warm), var(--mobile-green));
}

.mobile-checks h2 {
  font-size: 25px;
}

.mobile-checks p {
  color: var(--mobile-muted);
  line-height: 1.75;
}

.mobile-rescue {
  padding: 0;
  overflow: hidden;
}

.mobile-rescue-card {
  padding: 38px;
  min-height: 260px;
  background:
    linear-gradient(120deg, rgba(16, 24, 41, 0.92), rgba(22, 32, 51, 0.76)),
    radial-gradient(circle at 88% 12%, rgba(247, 185, 85, 0.34), transparent 14rem);
  color: #fff;
}

.mobile-rescue-card h2 {
  max-width: 700px;
}

.mobile-rescue-card p {
  max-width: 760px;
  color: #dbe5f6;
}

.mobile-rescue-card a {
  margin-top: 10px;
  padding: 0 22px;
  background: var(--mobile-green);
  color: #fff;
}

.mobile-faq-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.mobile-faq-list details {
  border: 1px solid var(--mobile-line);
  border-radius: 22px;
  background: #f8fbff;
  padding: 18px 20px;
}

.mobile-faq-list summary {
  cursor: pointer;
  font-weight: 900;
}

.mobile-faq-list p {
  margin: 14px 0 0;
  color: var(--mobile-muted);
  line-height: 1.7;
}

.mobile-final {
  display: flex;
  justify-content: space-between;
  gap: 22px;
  align-items: center;
  background: linear-gradient(135deg, #dff5ed, #edf4ff);
}

.mobile-final-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.mobile-final-actions a {
  padding: 0 22px;
  background: var(--mobile-night);
  color: #fff;
}

.mobile-final-actions a:first-child {
  background: var(--mobile-green);
}

.mobile-footer {
  margin-bottom: 20px;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  color: #dfe8f8;
  background: var(--mobile-night);
}

.mobile-footer strong {
  display: block;
  font-size: 20px;
}

.mobile-footer p {
  margin: 8px 0 0;
  color: #aab7cf;
}

.mobile-footer a {
  flex: 0 0 auto;
  padding: 0 22px;
  background: #fff;
  color: var(--mobile-night);
}

.mobile-fixed-download {
  position: fixed;
  left: 50%;
  bottom: 18px;
  z-index: 30;
  width: min(460px, calc(100% - 28px));
  min-height: 58px;
  padding: 8px 9px 8px 18px;
  transform: translateX(-50%);
  border-radius: 999px;
  background: rgba(16, 24, 41, 0.94);
  color: #fff;
  display: none;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 18px 42px rgba(16, 24, 41, 0.28);
  backdrop-filter: blur(16px);
}

.mobile-fixed-download span {
  font-weight: 900;
}

.mobile-fixed-download a {
  min-height: 42px;
  padding: 0 18px;
  background: var(--mobile-green);
  color: #fff;
}

@media (max-width: 980px) {
  .mobile-menu {
    display: block;
  }

  .mobile-nav {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    display: none;
    padding: 10px;
    border-radius: 20px;
    background: var(--mobile-night);
    flex-direction: column;
    align-items: stretch;
  }

  .mobile-header.is-open .mobile-nav {
    display: flex;
  }

  .mobile-nav a {
    text-align: center;
  }

  .mobile-hero,
  .mobile-selector,
  .mobile-platform-layout,
  .mobile-detect-panel,
  .mobile-step-list,
  .mobile-checks,
  .mobile-faq-list {
    grid-template-columns: 1fr;
  }

  .mobile-hero-copy {
    min-height: auto;
    padding: 42px 28px;
  }

  .mobile-selector {
    grid-template-columns: 0.9fr 1.1fr;
  }

  .mobile-step-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  body.mobile-page {
    padding-bottom: 88px;
  }

  .mobile-header,
  .mobile-hero,
  .mobile-section,
  .mobile-final,
  .mobile-footer {
    width: calc(100vw - 20px);
    max-width: calc(100vw - 20px);
  }

  .mobile-header {
    top: 8px;
    margin-top: 8px;
  }

  .mobile-brand em {
    display: none;
  }

  .mobile-brand strong {
    font-size: 15px;
  }

  .mobile-hero {
    margin-top: 20px;
  }

  .mobile-hero-copy,
  .mobile-selector,
  .mobile-section,
  .mobile-final,
  .mobile-footer {
    border-radius: 26px;
    overflow: hidden;
  }

  .mobile-hero-copy,
  .mobile-selector,
  .mobile-section,
  .mobile-final,
  .mobile-footer,
  .mobile-lead,
  .mobile-tip,
  .mobile-platform-main p,
  .mobile-platform-side p,
  .mobile-faq-list p {
    min-width: 0;
    max-width: 100%;
    overflow-wrap: anywhere;
    word-break: break-word;
  }

  .mobile-hero h1 {
    font-size: clamp(40px, 14vw, 54px);
    letter-spacing: -0.08em;
  }

  .mobile-lead {
    font-size: 16px;
  }

  .mobile-hero-actions,
  .mobile-final,
  .mobile-footer {
    flex-direction: column;
    align-items: stretch;
  }

  .mobile-primary-btn,
  .mobile-secondary-btn,
  .mobile-final-actions a,
  .mobile-footer a {
    width: 100%;
  }

  .mobile-selector,
  .mobile-step-list {
    grid-template-columns: 1fr;
    padding: 18px;
  }

  .mobile-device-shell {
    min-height: 360px;
  }

  .mobile-screen {
    min-height: 318px;
  }

  .mobile-choice-stack {
    grid-template-rows: none;
  }

  .mobile-platform-main h3 {
    margin-top: 54px;
    font-size: 34px;
  }

  .mobile-section {
    padding: 24px;
  }

  .mobile-section-head {
    display: block;
  }

  .mobile-section h2,
  .mobile-final h2 {
    font-size: 30px;
  }

  .mobile-fixed-download {
    display: flex;
    gap: 10px;
    width: calc(100vw - 28px);
    max-width: calc(100vw - 28px);
  }

  .mobile-fixed-download a {
    flex: 0 0 112px;
    padding: 0 12px;
  }
}