:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-soft: #eef4fb;
  --text: #172033;
  --muted: #617086;
  --line: #dce6f1;
  --brand: #1368f5;
  --brand-dark: #0c4fbd;
  --green: #1b9b6b;
  --shadow: 0 20px 55px rgba(32, 55, 90, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 80% 0%, rgba(19, 104, 245, 0.12), transparent 28%),
    linear-gradient(180deg, #f8fbff 0%, var(--bg) 100%);
}

a {
  color: inherit;
}

.site-shell {
  width: min(1120px, calc(100% - 28px));
  margin: 0 auto;
  padding: 20px 0 44px;
}

.site-header,
.hero,
.problem-row,
.section,
.trial,
.contact,
.footer {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 18px;
  border-radius: 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), #44a3ff);
  font-weight: 800;
}

.brand-icon-image {
  padding: 0;
  overflow: hidden;
  background: #ffffff;
  border: 1px solid rgba(19, 104, 245, 0.16);
}

.brand-icon-image img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

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

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

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

.nav a,
.language a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}

.nav a {
  padding: 8px 10px;
}

.nav a:hover,
.language a:hover,
.language a.active {
  color: var(--brand);
}

.language a {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 11px;
}

.language a.active {
  background: var(--surface-soft);
}

.hero {
  margin-top: 18px;
  padding: 38px;
  border-radius: 30px;
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 26px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--brand);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 18px;
  font-size: clamp(36px, 5vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

h2 {
  margin-bottom: 12px;
  font-size: clamp(27px, 3.2vw, 38px);
  letter-spacing: -0.02em;
}

h3 {
  margin-bottom: 9px;
  font-size: 20px;
}

.lead,
.section-title p,
.section p,
.trial p,
.contact p,
.problem-row span {
  color: var(--muted);
  line-height: 1.75;
}

.lead {
  max-width: 660px;
  font-size: 17px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 999px;
  font-weight: 750;
  text-decoration: none;
}

.button.primary {
  color: #fff;
  background: var(--brand);
}

.button.primary:hover {
  background: var(--brand-dark);
}

.button.secondary {
  color: var(--brand);
  border: 1px solid #b9cff8;
  background: #eef5ff;
}

.app-card {
  border: 1px solid #cbd9ec;
  border-radius: 24px;
  overflow: hidden;
  background: #0f172a;
  color: #e9f2ff;
}

.app-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.app-bar span {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: #fb7185;
}

.app-bar span:nth-child(2) {
  background: #facc15;
}

.app-bar span:nth-child(3) {
  background: #4ade80;
}

.app-bar strong {
  margin-left: 6px;
  color: #b9c7d9;
  font-size: 13px;
}

.drop-zone {
  margin: 18px;
  padding: 26px;
  border: 1px dashed #44617f;
  border-radius: 18px;
  text-align: center;
  background: rgba(255, 255, 255, 0.04);
}

.drop-zone strong {
  display: block;
  font-size: 24px;
}

.drop-zone p,
.app-note,
.app-grid small,
.progress-row span {
  color: #9fb1c7;
}

.app-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 0 18px 18px;
}

.app-grid div {
  padding: 14px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.05);
}

.app-grid small,
.app-grid strong {
  display: block;
}

.app-grid strong {
  margin-top: 7px;
}

.progress-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
  margin: 0 18px 14px;
}

.progress-row div {
  height: 10px;
  border-radius: 999px;
  background: #25364b;
  overflow: hidden;
}

.progress-row i {
  display: block;
  width: 68%;
  height: 100%;
  background: linear-gradient(90deg, #3b82f6, #22c55e);
}

.app-note {
  margin: 0 18px 18px;
  font-size: 14px;
}

code {
  padding: 2px 5px;
  border-radius: 5px;
  background: rgba(19, 104, 245, 0.1);
  color: var(--brand-dark);
}

.problem-row {
  margin-top: 18px;
  padding: 16px;
  border-radius: 24px;
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.problem-row article,
.tool-card,
.roadmap-grid article,
.manual-grid article,
.card-grid article,
.steps article,
.result-grid article,
.trial-info,
.faq-grid article,
.qr-box {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}

.problem-row article {
  padding: 18px;
}

.problem-row strong,
.problem-row span {
  display: block;
}

.problem-row span {
  margin-top: 7px;
}

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

.tool-card,
.roadmap-grid article {
  padding: 20px;
}

.tool-card span {
  display: inline-flex;
  margin-bottom: 12px;
  padding: 7px 10px;
  border-radius: 999px;
  color: var(--brand-dark);
  background: #eaf3ff;
  font-size: 13px;
  font-weight: 750;
}

.tool-card h3 {
  font-size: 22px;
}

.tool-card p,
.roadmap-grid span {
  display: block;
  color: var(--muted);
  line-height: 1.75;
}

.tool-card a {
  display: inline-flex;
  margin-top: 12px;
  margin-right: 12px;
  color: var(--brand);
  font-weight: 750;
  text-decoration: none;
}

.active-tool {
  border-color: #a9c9ff;
  background: linear-gradient(135deg, #ffffff, #f0f6ff);
}

.muted-tool {
  background: #f9fbfe;
}

.muted-tool span {
  color: #6b778a;
  background: #eef2f7;
}

.section,
.trial,
.contact {
  margin-top: 18px;
  padding: 30px;
  border-radius: 28px;
}

.section-title {
  max-width: 760px;
  margin-bottom: 20px;
}

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

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

.preview-card {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: #fff;
  padding: 20px;
}

.screenshot-card {
  margin: 14px 0 0;
  border: 1px solid #1d2c46;
  border-radius: 22px;
  overflow: hidden;
  background: #101827;
  box-shadow: 0 18px 42px rgba(21, 34, 56, 0.18);
  height: clamp(220px, 26vw, 360px);
  display: grid;
  place-items: center;
  padding: 12px;
}

.screenshot-card img {
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  object-position: center;
}

.screenshot-light {
  border-color: #d3dce8;
  background: #eef2f7;
}

.screenshot-dark {
  background: #101827;
}

.preview-head span {
  display: inline-flex;
  margin-bottom: 10px;
  padding: 7px 10px;
  border-radius: 999px;
  color: var(--brand-dark);
  background: #eaf3ff;
  font-size: 13px;
  font-weight: 750;
}

.preview-head h3 {
  margin: 0 0 10px;
}

.preview-head p {
  margin-bottom: 0;
  line-height: 1.65;
}

.preview-head h3,
.preview-head h3 {
  margin: 0 0 10px;
}

.manual-grid article {
  padding: 20px;
  position: relative;
  overflow: hidden;
}

.manual-grid article::after {
  content: "";
  position: absolute;
  right: -24px;
  top: -24px;
  width: 78px;
  height: 78px;
  border-radius: 999px;
  background: rgba(19, 104, 245, 0.08);
}

.manual-grid span {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 12px;
  border-radius: 12px;
  color: #fff;
  background: var(--brand);
  font-weight: 800;
}

.tip {
  margin: 18px 0 0;
  padding: 14px 16px;
  border: 1px solid #b9cff8;
  border-radius: 16px;
  color: var(--brand-dark);
  background: #eef5ff;
  line-height: 1.7;
}

.card-grid,
.steps,
.result-grid,
.faq-grid {
  display: grid;
  gap: 14px;
}

.card-grid,
.faq-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card-grid article,
.steps article,
.result-grid article,
.faq-grid article {
  padding: 19px;
}

.split,
.trial,
.contact {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 18px;
}

.steps {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.steps span {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  margin-bottom: 12px;
  border-radius: 14px;
  color: #fff;
  background: var(--brand);
  font-weight: 800;
}

.result-section {
  background: #f9fcff;
}

.result-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.result-grid span {
  display: inline-flex;
  margin-bottom: 12px;
  padding: 7px 10px;
  border-radius: 999px;
  color: var(--brand-dark);
  background: #eaf3ff;
  font-size: 13px;
  font-weight: 700;
}

.result-grid strong {
  display: block;
  margin-bottom: 8px;
  color: var(--green);
  font-size: 24px;
}

.roadmap-grid strong {
  display: block;
  margin-bottom: 8px;
  color: var(--text);
  font-size: 18px;
}

.trial {
  background: linear-gradient(135deg, #eff6ff, #ffffff);
}

.trial-info {
  padding: 18px;
}

.trial-info p,
.contact-copy p {
  margin-bottom: 10px;
}

.faq-group + .faq-group {
  margin-top: 22px;
}

.faq-group > h3 {
  margin: 0 0 14px;
  font-size: 22px;
}

.trial-info span,
.contact-copy span {
  display: inline-block;
  min-width: 76px;
  color: var(--brand);
  font-weight: 750;
}

.contact {
  background: linear-gradient(135deg, #ffffff, #f3f8ff);
}

.qr-box {
  padding: 18px;
  text-align: center;
}

.qr-box img {
  width: min(100%, 280px);
  padding: 10px;
  border-radius: 18px;
  background: #fff;
  border: 1px solid var(--line);
}

.footer {
  margin-top: 18px;
  padding: 18px 22px;
  border-radius: 22px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.footer p {
  margin: 0;
  color: var(--muted);
}

.footer a {
  color: var(--brand);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

@media (max-width: 960px) {
  .site-header,
  .hero,
  .split,
  .trial,
  .contact {
    grid-template-columns: 1fr;
  }

  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .problem-row,
  .tool-list,
  .roadmap-grid,
  .preview-grid,
  .manual-grid,
  .card-grid,
  .steps,
  .result-grid,
  .faq-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .site-shell {
    width: min(100% - 18px, 100%);
    padding-top: 10px;
  }

  .hero,
  .section,
  .trial,
  .contact {
    padding: 20px;
    border-radius: 22px;
  }

  .problem-row,
  .tool-list,
  .roadmap-grid,
  .preview-grid,
  .manual-grid,
  .card-grid,
  .steps,
  .result-grid,
  .faq-grid,
  .app-grid {
    grid-template-columns: 1fr;
  }

  .preview-card {
    padding: 16px;
  }

  .preview-grid {
    gap: 12px;
  }

  .preview-head h3 {
    font-size: 18px;
  }

  .preview-head p {
    font-size: 14px;
  }

  .screenshot-card {
    height: 220px;
    padding: 8px;
    margin-top: 12px;
  }

  .screenshot-card img {
    max-height: 100%;
  }

}