:root {
  --blue: #1478ff;
  --blue-2: #4f6dff;
  --cyan: #12c8ff;
  --ink: #101827;
  --text: #243044;
  --muted: #667085;
  --soft: #eef4ff;
  --soft-2: #f6f8ff;
  --line: #dbe6ff;
  --surface: #ffffff;
  --shadow: 0 22px 70px rgba(41, 89, 180, 0.14);
  --radius: 8px;
  --container: 1200px;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  color: var(--text);
  background: #fff;
  font-size: 16px;
  line-height: 1.65;
}

body.menu-open {
  overflow: hidden;
}

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

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid rgba(20, 120, 255, 0.36);
  outline-offset: 3px;
}

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

.site {
  min-height: 100dvh;
  background: linear-gradient(180deg, #f2f5ff 0%, #fff 42%, #f8fbff 100%);
}

.container {
  width: min(var(--container), calc(100% - 40px));
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: 12px;
  z-index: 200;
  transform: translateY(-140%);
  padding: 10px 14px;
  border-radius: 999px;
  color: #fff;
  background: var(--blue);
  font-weight: 800;
}

.skip-link:focus {
  transform: translateY(0);
}

.topline {
  min-height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 8px 20px;
  color: #fff;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.12) 0 12%, transparent 12% 28%, rgba(255, 255, 255, 0.12) 28% 40%, transparent 40%),
    linear-gradient(100deg, #7b83ff, #8f73ff 48%, #5c83ff);
  font-weight: 800;
  text-align: center;
}

.topline-btn {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  border-radius: 10px;
  color: #fff;
  background: var(--blue);
  box-shadow: 0 12px 26px rgba(0, 64, 220, 0.24);
  white-space: nowrap;
}

.header {
  position: sticky;
  top: 0;
  z-index: 80;
  border-bottom: 1px solid rgba(20, 120, 255, 0.1);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(18px);
}

.nav {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.brand {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--blue);
  font-weight: 900;
  white-space: nowrap;
}

.brand img {
  width: 34px;
  height: 34px;
  object-fit: contain;
}

.brand-name {
  font-size: 25px;
  letter-spacing: 0;
}

.brand-badge {
  min-height: 28px;
  display: inline-flex;
  align-items: center;
  padding: 0 10px;
  border-radius: 8px;
  color: #fff;
  background: var(--blue);
  font-size: 13px;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  flex: 1;
}

.nav-links a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0 14px;
  border-radius: 999px;
  color: #1f2937;
  font-weight: 700;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--blue);
  background: rgba(20, 120, 255, 0.08);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.phone-link {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: #111827;
}

.phone-link span {
  width: 15px;
  height: 15px;
  border: 3px solid #fff;
  border-top-color: transparent;
  border-right-color: transparent;
  border-radius: 50%;
  transform: rotate(-35deg);
}

.btn,
.menu-button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  font-weight: 900;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

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

.btn-primary {
  padding: 0 22px;
  color: var(--blue);
  background: #fff;
  border-color: rgba(20, 120, 255, 0.34);
  box-shadow: 0 12px 28px rgba(20, 120, 255, 0.14);
}

.btn-primary:hover {
  border-color: rgba(20, 120, 255, 0.62);
  box-shadow: 0 16px 34px rgba(20, 120, 255, 0.2);
}

.btn-ghost {
  padding: 0 18px;
  color: var(--ink);
  background: #fff;
  border-color: rgba(20, 120, 255, 0.18);
}

.menu-button {
  display: none;
  width: 44px;
  color: var(--ink);
  background: #fff;
  border-color: rgba(20, 120, 255, 0.2);
}

.menu-button svg {
  width: 22px;
  height: 22px;
  stroke-width: 2.4;
}

.download-home-hero {
  position: relative;
  padding: 88px 0 72px;
  overflow: hidden;
  background:
    radial-gradient(circle at 18% 18%, rgba(20, 120, 255, 0.12), transparent 26%),
    radial-gradient(circle at 82% 10%, rgba(65, 226, 186, 0.2), transparent 24%),
    linear-gradient(180deg, #eef0ff 0%, #f4f7ff 56%, #fff 100%);
}

.download-home-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(20, 120, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 120, 255, 0.08) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.72), transparent 72%);
  pointer-events: none;
}

.hero-center {
  position: relative;
  z-index: 1;
  max-width: 840px;
  margin: 0 auto 62px;
  text-align: center;
}

.page-kicker {
  margin-bottom: 10px;
  color: var(--blue);
  font-weight: 900;
}

.hero-center h1,
.sub-hero h1,
.article-header h1,
.login-copy h1 {
  margin-bottom: 14px;
  color: var(--ink);
  font-size: clamp(42px, 7vw, 74px);
  line-height: 1.08;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

.hero-subtitle {
  max-width: 780px;
  margin: 0 auto 28px;
  color: var(--muted);
  font-size: clamp(17px, 1.8vw, 22px);
}

.version-line {
  margin-bottom: 0;
  color: #6b7280;
  font-size: 15px;
}

.client-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(260px, 1fr));
  gap: 22px;
  align-items: stretch;
  max-width: 820px;
  margin: 0 auto;
}

.client-card {
  min-height: 300px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 34px 28px 26px;
  border: 1px solid rgba(20, 120, 255, 0.13);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 18px 50px rgba(20, 120, 255, 0.09);
  text-align: center;
}

.client-card h2 {
  margin-bottom: 0;
  color: var(--ink);
  font-size: 26px;
  line-height: 1.25;
}

.client-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.55;
}

.client-card .btn {
  width: 100%;
}

.client-icon {
  width: 78px;
  height: 78px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  font-weight: 900;
}

.windows-icon {
  width: 76px;
  height: 76px;
  display: block;
  border-radius: 19px;
  background:
    linear-gradient(#fff 0 0) center / 6px 100% no-repeat,
    linear-gradient(90deg, #fff 0 0) center / 100% 6px no-repeat,
    linear-gradient(135deg, #11b8ff, #1478ff 54%, #5b6cff);
  box-shadow: inset 0 0 0 1px rgba(20, 120, 255, 0.16), 0 18px 36px rgba(20, 120, 255, 0.16);
}

.windows-icon i {
  display: none;
}

.mac-icon {
  border-radius: 22px;
  background: radial-gradient(circle at 52% 36%, #111827 0 31%, transparent 32%), radial-gradient(circle at 42% 60%, #111827 0 25%, transparent 26%);
}

.download-note {
  position: relative;
  z-index: 1;
  max-width: 820px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin: 20px auto 0;
  padding: 18px 22px;
  border: 1px solid rgba(20, 120, 255, 0.14);
  border-radius: 18px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.8);
  box-shadow: 0 14px 36px rgba(20, 120, 255, 0.08);
}

.download-note a {
  color: var(--blue);
  font-weight: 900;
  white-space: nowrap;
}

.tab-pills {
  width: fit-content;
  max-width: 100%;
  display: flex;
  gap: 4px;
  margin: 34px auto 0;
  padding: 6px;
  border: 1px solid rgba(20, 120, 255, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
  overflow-x: auto;
}

.tab-pills a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  border-radius: 999px;
  color: #7a8494;
  font-weight: 900;
  white-space: nowrap;
}

.tab-pills a.active,
.tab-pills a:hover {
  color: var(--ink);
  background: #fff;
  box-shadow: 0 8px 22px rgba(16, 24, 39, 0.08);
}

.section {
  padding: 86px 0;
}

.white-section {
  background: #fff;
}

.soft-section {
  background: linear-gradient(180deg, #f7faff, #eef5ff);
}

.section-title {
  max-width: 620px;
}

.section-title.centered {
  max-width: 840px;
  margin: 0 auto 36px;
  text-align: center;
}

.section-title p {
  margin-bottom: 8px;
  color: var(--blue);
  font-weight: 900;
}

.section-title h2,
.article-preview-card h2 {
  margin-bottom: 12px;
  color: var(--ink);
  font-size: clamp(32px, 4.4vw, 54px);
  line-height: 1.12;
  letter-spacing: 0;
}

.section-title span,
.article-preview-card p {
  display: block;
  color: var(--muted);
  font-size: 18px;
}

.feature-strip {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.feature-strip article,
.solution-grid article,
.related-card,
.download-card,
.install-panel,
.login-card,
.article-preview-card,
.aside-card {
  border: 1px solid rgba(20, 120, 255, 0.14);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 16px 42px rgba(20, 120, 255, 0.08);
}

.feature-strip article {
  min-height: 210px;
  padding: 24px 20px;
  text-align: center;
}

.feature-strip h3,
.solution-grid h3,
.related-card h2,
.download-card h2 {
  margin-bottom: 8px;
  color: var(--ink);
  font-size: 22px;
  line-height: 1.25;
}

.feature-strip p,
.solution-grid p,
.related-card p,
.download-card p,
.install-panel span,
.login-copy p {
  color: var(--muted);
}

.product-icon {
  width: 62px;
  height: 62px;
  display: inline-flex;
  margin-bottom: 20px;
  border-radius: 18px;
  background: linear-gradient(135deg, #f1f6ff, #dfeaff);
}

.ai-icon {
  background: radial-gradient(circle at 50% 50%, #9a7cff 0 24%, transparent 25%), linear-gradient(135deg, #f7f1ff, #e9ddff);
}

.table-icon {
  background:
    linear-gradient(90deg, transparent 48%, rgba(20, 120, 255, 0.5) 49% 52%, transparent 53%),
    linear-gradient(0deg, transparent 48%, rgba(20, 120, 255, 0.5) 49% 52%, transparent 53%),
    linear-gradient(135deg, #eef6ff, #d7e7ff);
}

.search-icon {
  border-radius: 50%;
  border: 8px solid #ffb000;
  background: #fff;
  box-shadow: 18px 18px 0 -8px #1478ff;
}

.meeting-icon {
  background: radial-gradient(circle at 50% 50%, #fff 0 21%, transparent 22%), linear-gradient(135deg, #1478ff, #12c8ff);
}

.doc-icon {
  background: linear-gradient(135deg, #1478ff, #6aa8ff);
}

.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 42px;
  align-items: start;
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.solution-grid article {
  min-height: 210px;
  padding: 24px;
}

.solution-grid b {
  display: block;
  margin-bottom: 20px;
  color: var(--blue);
  font-size: 20px;
}

.scenario-grid,
.deploy-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.scenario-grid article,
.deploy-steps article {
  min-height: 240px;
  padding: 26px;
  border: 1px solid rgba(20, 120, 255, 0.14);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 16px 42px rgba(20, 120, 255, 0.08);
}

.scenario-grid span,
.deploy-steps b {
  width: 46px;
  height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 30px;
  border-radius: 50%;
  color: var(--blue);
  background: #eef5ff;
  font-weight: 1000;
}

.scenario-grid h3,
.deploy-steps h3 {
  margin-bottom: 10px;
  color: var(--ink);
  font-size: 24px;
  line-height: 1.25;
}

.scenario-grid p,
.deploy-steps p {
  color: var(--muted);
}

.workbench-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(420px, 1fr);
  gap: 42px;
  align-items: center;
}

.workbench-panel {
  overflow: hidden;
  border: 1px solid rgba(20, 120, 255, 0.14);
  border-radius: 24px;
  background: #fff;
  box-shadow: var(--shadow);
}

.workbench-top {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 0 24px;
  border-bottom: 1px solid rgba(20, 120, 255, 0.12);
}

.workbench-top strong {
  color: var(--ink);
  font-size: 22px;
}

.workbench-top span {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border-radius: 999px;
  color: var(--blue);
  background: #eef5ff;
  font-weight: 900;
}

.workbench-list {
  display: grid;
  gap: 12px;
  padding: 22px;
}

.workbench-list div {
  min-height: 80px;
  display: grid;
  gap: 4px;
  align-content: center;
  padding: 16px 18px;
  border-radius: 18px;
  background: #f5f8ff;
}

.workbench-list b {
  color: var(--ink);
  font-size: 18px;
}

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

.article-preview {
  background: #fff;
}

.article-preview-card {
  min-height: 260px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 44px;
  background:
    radial-gradient(circle at 88% 24%, rgba(20, 120, 255, 0.12), transparent 28%),
    #fff;
}

.article-preview-card > div {
  max-width: 760px;
}

.floating-tools {
  position: fixed;
  right: 28px;
  bottom: 34px;
  z-index: 70;
  display: grid;
  gap: 1px;
  overflow: hidden;
  border: 1px solid rgba(20, 120, 255, 0.14);
  border-radius: 999px;
  background: #fff;
  box-shadow: var(--shadow);
}

.floating-tools a {
  width: 58px;
  min-height: 58px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  background: #fff;
  font-size: 13px;
  font-weight: 900;
}

.floating-tools a + a {
  border-top: 1px solid #eef2ff;
}

.sub-hero {
  padding: 74px 0 54px;
  background:
    radial-gradient(circle at 84% 12%, rgba(20, 120, 255, 0.14), transparent 26%),
    linear-gradient(180deg, #eef2ff 0%, #fff 100%);
}

.sub-hero-inner {
  max-width: 880px;
  text-align: center;
}

.sub-hero p:last-child {
  max-width: 700px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 19px;
}

.download-page-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 28px;
  align-items: start;
}

.download-stack {
  display: grid;
  gap: 16px;
}

.download-card {
  min-height: 150px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 24px;
}

.download-main {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
}

.os-mark {
  width: 72px;
  height: 72px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 18px;
  color: var(--blue);
  background: #eef5ff;
  font-weight: 1000;
}

.install-panel {
  position: sticky;
  top: 102px;
  padding: 28px;
}

.install-panel h2 {
  margin-bottom: 22px;
  color: var(--ink);
  font-size: 32px;
}

.info-tile {
  display: grid;
  gap: 6px;
  padding: 18px;
  border-radius: 18px;
  background: #f2f6ff;
}

.info-tile + .info-tile {
  margin-top: 14px;
}

.info-tile strong {
  color: var(--ink);
  font-size: 18px;
}

.login-hero {
  min-height: calc(100dvh - 128px);
  display: flex;
  align-items: center;
  padding: 74px 0;
  background:
    radial-gradient(circle at 15% 22%, rgba(20, 120, 255, 0.14), transparent 28%),
    radial-gradient(circle at 90% 70%, rgba(18, 200, 255, 0.16), transparent 24%),
    linear-gradient(180deg, #f4f7ff, #fff);
}

.login-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 460px);
  gap: 46px;
  align-items: center;
}

.login-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}

.login-stats span {
  min-height: 86px;
  display: grid;
  gap: 4px;
  align-content: center;
  padding: 16px;
  border: 1px solid rgba(20, 120, 255, 0.14);
  border-radius: var(--radius);
  background: #fff;
}

.login-stats strong {
  color: var(--blue);
}

.login-card {
  padding: 30px;
}

.login-card h2 {
  margin-bottom: 22px;
  color: var(--ink);
  font-size: 30px;
}

.form-field {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
}

.form-field label,
.form-row {
  color: var(--ink);
  font-weight: 800;
}

.form-field input {
  width: 100%;
  min-height: 52px;
  padding: 0 14px;
  border: 1px solid rgba(20, 120, 255, 0.2);
  border-radius: var(--radius);
  color: var(--ink);
  background: #fff;
}

.password-wrap {
  position: relative;
}

.password-wrap input {
  padding-right: 56px;
}

.toggle-password {
  position: absolute;
  right: 8px;
  top: 50%;
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transform: translateY(-50%);
  border: 0;
  border-radius: 50%;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
}

.toggle-password svg {
  width: 22px;
  height: 22px;
}

.form-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin: 8px 0 22px;
  font-size: 14px;
}

.check {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.login-card .btn {
  width: 100%;
}

.article-page {
  padding: 74px 0 88px;
  background: linear-gradient(180deg, #f2f6ff 0%, #fff 26%);
}

.article-header {
  max-width: 920px;
}

.article-header h1 {
  font-size: clamp(40px, 5.4vw, 64px);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--muted);
  font-weight: 700;
}

.article-meta span {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid rgba(20, 120, 255, 0.13);
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 760px) minmax(280px, 1fr);
  gap: 38px;
  margin-top: 40px;
  align-items: start;
}

.article-body {
  padding: 38px;
  border: 1px solid rgba(20, 120, 255, 0.12);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
}

.article-body .lead {
  color: var(--ink);
  font-size: 22px;
  line-height: 1.65;
}

.article-toc {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 28px 0 34px;
  padding: 18px;
  border: 1px solid rgba(20, 120, 255, 0.14);
  border-radius: var(--radius);
  background: #f5f8ff;
}

.article-toc strong {
  grid-column: 1 / -1;
  color: var(--ink);
  font-size: 18px;
}

.article-toc a {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border-radius: 999px;
  color: var(--blue);
  background: #fff;
  font-weight: 800;
}

.article-body h2 {
  margin: 34px 0 10px;
  color: var(--ink);
  font-size: 30px;
}

.article-body p {
  color: var(--text);
  font-size: 18px;
}

.article-body blockquote {
  margin: 32px 0 0;
  padding: 22px 24px;
  border-left: 4px solid var(--blue);
  border-radius: var(--radius);
  color: var(--ink);
  background: #eef5ff;
  font-size: 20px;
  font-weight: 800;
}

.faq-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.faq-list details {
  padding: 18px 20px;
  border: 1px solid rgba(20, 120, 255, 0.14);
  border-radius: var(--radius);
  background: #f8fbff;
}

.faq-list summary {
  color: var(--ink);
  cursor: pointer;
  font-weight: 900;
}

.faq-list p {
  margin: 12px 0 0;
}

.article-aside {
  position: sticky;
  top: 102px;
  display: grid;
  gap: 16px;
}

.aside-card {
  display: grid;
  gap: 12px;
  padding: 22px;
}

.aside-card strong {
  color: var(--ink);
  font-size: 20px;
}

.aside-card a:not(.btn) {
  color: var(--blue);
  font-weight: 800;
}

.blue-card {
  background: linear-gradient(180deg, #f4f8ff, #fff);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.related-card {
  min-height: 270px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-between;
  padding: 28px;
}

.related-card span {
  color: var(--blue);
  font-weight: 1000;
}

.related-card.highlight {
  background:
    radial-gradient(circle at 88% 18%, rgba(20, 120, 255, 0.18), transparent 28%),
    #fff;
}

.footer {
  padding: 56px 0 32px;
  color: #d7e5ff;
  background: #101827;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 28px;
}

.footer strong {
  display: block;
  margin-bottom: 12px;
  color: #fff;
  font-size: 18px;
}

.footer a,
.footer p {
  display: block;
  margin-bottom: 8px;
  color: #b8c6dc;
}

.footer-bottom {
  margin-top: 34px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  color: #8fa3bd;
  font-size: 14px;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  z-index: 120;
  transform: translate(-50%, 16px);
  padding: 12px 18px;
  border-radius: 999px;
  color: #fff;
  background: #101827;
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
}

.toast.show {
  transform: translate(-50%, 0);
  opacity: 1;
}

@media (max-width: 1080px) {
  .nav-links {
    position: fixed;
    inset: 128px 20px auto;
    z-index: 100;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    border: 1px solid rgba(20, 120, 255, 0.16);
    border-radius: 18px;
    background: #fff;
    box-shadow: var(--shadow);
  }

  body.menu-open .nav-links {
    display: flex;
  }

  .nav-links a {
    justify-content: center;
  }

  .menu-button {
    display: inline-flex;
  }

  .phone-link,
  .nav-actions .btn-ghost {
    display: none;
  }

  .client-grid,
  .feature-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .feature-strip article:first-child {
    grid-column: span 2;
  }

  .split-layout,
  .workbench-layout,
  .download-page-grid,
  .login-layout,
  .article-layout {
    grid-template-columns: 1fr;
  }

  .install-panel,
  .article-aside {
    position: static;
  }

  .related-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .scenario-grid,
  .deploy-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .container {
    width: min(var(--container), calc(100% - 28px));
  }

  .topline {
    min-height: 48px;
    flex-wrap: wrap;
    gap: 10px;
    padding: 8px 12px;
    font-size: 13px;
  }

  .topline span {
    max-width: min(230px, 62vw);
    line-height: 1.35;
  }

  .brand-badge,
  .nav-actions .btn-primary {
    display: none;
  }

  .download-home-hero,
  .section,
  .sub-hero,
  .login-hero,
  .article-page {
    padding: 54px 0;
  }

  .hero-center {
    margin-bottom: 34px;
  }

  .hero-center h1,
  .sub-hero h1,
  .article-header h1,
  .login-copy h1 {
    max-width: 100%;
    white-space: normal;
    word-break: break-word;
    overflow-wrap: anywhere;
  }

  .client-grid,
  .feature-strip,
  .solution-grid,
  .scenario-grid,
  .deploy-steps,
  .related-grid,
  .footer-grid,
  .login-stats {
    grid-template-columns: 1fr;
  }

  .client-card.primary-client,
  .feature-strip article:first-child {
    grid-column: auto;
  }

  .client-card {
    min-height: 260px;
    overflow: hidden;
  }

  .download-note {
    flex-direction: column;
    align-items: flex-start;
  }

  .client-card p {
    max-width: 100%;
    word-break: break-word;
  }

  .tab-pills {
    width: 100%;
    justify-content: flex-start;
  }

  .tab-pills a {
    padding: 0 18px;
  }

  .article-preview-card,
  .download-card {
    flex-direction: column;
    align-items: stretch;
  }

  .download-card .btn {
    width: 100%;
  }

  .download-main {
    grid-template-columns: 58px 1fr;
  }

  .os-mark {
    width: 58px;
    height: 58px;
    border-radius: 14px;
    font-size: 13px;
  }

  .article-body {
    padding: 24px 20px;
  }

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

  .floating-tools {
    display: none;
  }
}

@media (max-width: 420px) {
  .brand-name {
    font-size: 22px;
  }

  .hero-center h1,
  .sub-hero h1,
  .article-header h1,
  .login-copy h1 {
    font-size: 38px;
  }

  .section-title h2,
  .article-preview-card h2 {
    font-size: 30px;
  }

  .topline-btn {
    padding: 0 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
  }
}