:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #eef2f7;
  --ink: #111827;
  --muted: #667085;
  --line: #d9e0ea;
  --primary: #2457d6;
  --primary-2: #1592b8;
  --success: #15803d;
  --warning: #d97706;
  --radius: 8px;
  --shadow: 0 18px 55px rgba(17, 24, 39, 0.12);
  --max: 1180px;
  --font: "Noto Sans SC", "Microsoft YaHei UI", "Microsoft YaHei", sans-serif;
  --font-display: "Inter", "Noto Sans SC", sans-serif;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(246, 247, 249, 0.9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(217, 224, 234, 0.85);
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 750;
  color: var(--ink);
}

.brand img { flex: 0 0 auto; }

.brand-logo {
  height: 32px;
  width: auto;
  display: block;
}

.site-footer .brand-logo {
  height: 28px;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-desktop a,
.nav-mobile a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  padding: 9px 12px;
  border-radius: 7px;
}

.nav-desktop a:hover,
.nav-mobile a:hover {
  color: var(--ink);
  background: #ffffff;
}

.nav-cta {
  color: #ffffff !important;
  background: var(--ink) !important;
  margin-left: 8px;
}

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 7px;
  padding: 8px 12px;
  font: inherit;
  min-width: 64px;
  white-space: nowrap;
}

.nav-mobile {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding-bottom: 16px;
}

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

.hero {
  position: relative;
  overflow: hidden;
  padding: 88px 0 26px;
  background:
    linear-gradient(130deg, rgba(36, 87, 214, 0.11), transparent 36%),
    linear-gradient(180deg, #ffffff 0%, #f6f7f9 76%);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -10% -38% -10%;
  height: 52%;
  background: #111827;
  transform: skewY(-3deg);
  z-index: 0;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 54px;
  align-items: center;
}

.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  color: var(--primary);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  letter-spacing: 0;
  line-height: 1.12;
}

h1 {
  margin: 0;
  font-size: clamp(42px, 6vw, 68px);
  max-width: 780px;
}

h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
}

h3 { margin: 0; font-size: 20px; }

.hero-lead,
.section-heading > p,
.muted {
  color: var(--muted);
  font-size: 18px;
}

.hero-lead {
  margin: 24px 0 32px;
  max-width: 620px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border-radius: 7px;
  padding: 10px 18px;
  border: 1px solid transparent;
  font-weight: 700;
  font-size: 14px;
}

.btn-lg { min-height: 50px; padding-inline: 22px; font-size: 15px; }
.btn-primary { background: var(--primary); color: #ffffff; }
.btn-primary:hover { background: #1d4ed8; color: #ffffff; }
.btn-secondary { background: #ffffff; border-color: var(--line); color: var(--ink); }
.btn-secondary:hover { border-color: #b7c2d2; }

.hero-download-meta {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.trust-row span {
  color: #344054;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 13px;
  font-weight: 700;
}

.hero-visual {
  position: relative;
  min-height: 520px;
}

.hero-product {
  width: 100%;
  display: block;
  filter: drop-shadow(0 26px 45px rgba(17, 24, 39, 0.2));
}

.metric-card {
  position: absolute;
  display: grid;
  gap: 2px;
  min-width: 148px;
  padding: 14px 16px;
  background: rgba(255,255,255,0.94);
  border: 1px solid rgba(217,224,234,0.9);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.metric-card strong {
  font-family: var(--font-display);
  font-size: 28px;
  line-height: 1;
}

.metric-card span { color: var(--muted); font-size: 13px; font-weight: 700; }
.metric-card-a { right: 2%; top: 10%; }
.metric-card-b { left: 2%; bottom: 12%; }

.hero-bottom {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 58px;
}

.hero-proof {
  display: flex;
  gap: 14px;
  align-items: baseline;
  background: rgba(255,255,255,0.92);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
}

.hero-proof strong { white-space: nowrap; }
.hero-proof span { color: var(--muted); }

.section {
  padding: 92px 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading p { margin: 16px 0 0; }

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

.outcome-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 0 0 28px;
}

.outcome-grid div {
  display: grid;
  gap: 6px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}

.outcome-grid strong {
  font-size: 17px;
}

.outcome-grid span {
  color: var(--muted);
  font-size: 14px;
}

.value-grid article,
.runtime-card,
.pricing-grid article,
.upload-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 1px 2px rgba(17, 24, 39, 0.04);
}

.value-grid p,
.runtime-card li,
.pricing-grid p,
.pricing-grid li {
  color: var(--muted);
}

.value-icon {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  margin-bottom: 18px;
  color: #ffffff;
  font-family: var(--font-display);
  font-weight: 800;
}

.value-icon-excel { background: #217346; }
.value-icon-ppt { background: #d24726; }
.value-icon-docx { background: #2b579a; }
.value-icon-qa { background: #6d28d9; }

.section-ink {
  background: #111827;
  color: #ffffff;
}

.section-ink .section-kicker { color: #67e8f9; }
.section-ink .section-heading p,
.section-ink .runtime-card li,
.section-ink .pricing-grid p,
.section-ink .pricing-grid li { color: #b7c2d2; }

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

.runtime-card {
  background: #172033;
  border-color: rgba(255,255,255,0.11);
}

.runtime-top {
  display: grid;
  gap: 6px;
  margin-bottom: 18px;
}

.runtime-top span {
  color: #67e8f9;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.runtime-card ul,
.pricing-grid ul {
  margin: 0;
  padding-left: 18px;
}

.workflow-grid,
.split,
.beta-panel,
.contact-panel {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: start;
}

.workflow-steps {
  display: grid;
  gap: 14px;
}

.workflow-steps div,
.security-list div {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}

.workflow-steps span {
  color: var(--primary);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 13px;
}

.workflow-steps p,
.security-list span {
  display: block;
  margin: 6px 0 0;
  color: var(--muted);
}

.section-soft { background: #ffffff; }

.security-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.beta-panel,
.contact-panel {
  align-items: center;
}

.beta-copy,
.contact-copy {
  padding: 36px;
  border-radius: var(--radius);
  color: #ffffff;
  background:
    linear-gradient(135deg, rgba(36,87,214,0.92), rgba(21,146,184,0.9)),
    #2457d6;
  box-shadow: var(--shadow);
}

.beta-copy .section-kicker,
.beta-copy p,
.contact-copy .section-kicker,
.contact-copy p { color: rgba(255,255,255,0.86); }
.beta-copy h2,
.contact-copy h2 { margin: 0 0 16px; }

#beta-upload,
#contact { scroll-margin-top: 96px; }

.support-cards {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.support-cards div {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  padding: 14px 16px;
}

.support-cards strong {
  display: block;
  margin-bottom: 4px;
  font-size: 15px;
}

.support-cards span {
  display: block;
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.5;
}

.contact-form-panel {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}

.contact-form-panel h3 { margin: 0 0 6px; }
.contact-lead { margin: 0 0 22px; color: var(--muted); }

.contact-form { display: grid; gap: 16px; }

.form-actions { margin-top: 4px; }

.upload-panel h3 { margin-bottom: 6px; }
.upload-lead { margin: 0 0 22px; color: var(--muted); }

.upload-form { display: grid; gap: 16px; }
.form-row { display: grid; gap: 16px; }
.form-row.cols-2 { grid-template-columns: 1fr 1fr; }

.field {
  display: grid;
  gap: 7px;
  font-size: 14px;
  font-weight: 700;
}

.field em { color: #dc2626; font-style: normal; }

.field input,
.field select,
.field textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #f8fafc;
  padding: 11px 12px;
  color: var(--ink);
  font: inherit;
  font-weight: 500;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: 3px solid rgba(36, 87, 214, 0.12);
  border-color: var(--primary);
}

.file-field { position: relative; }
.field-label { display: block; }

.file-input-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.file-label-name {
  display: block;
  border: 1px dashed #9aa8bb;
  border-radius: 7px;
  padding: 13px 14px;
  color: var(--muted);
  background: #f8fafc;
  cursor: pointer;
}

.file-label-name:hover,
.file-label-name.is-selected { color: var(--primary); border-color: var(--primary); }

.field-hint { color: var(--muted); font-size: 13px; font-weight: 500; }

.upload-status,
.contact-status {
  margin: 0;
  border-radius: 7px;
  padding: 12px 14px;
  font-size: 14px;
}

.upload-status.is-pending,
.contact-status.is-pending { background: #eff6ff; color: #1d4ed8; border: 1px solid #bfdbfe; }
.upload-status.is-success,
.contact-status.is-success { background: #f0fdf4; color: #15803d; border: 1px solid #bbf7d0; }
.upload-status.is-error,
.contact-status.is-error { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }

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

.pricing-grid article {
  background: #172033;
  border-color: rgba(255,255,255,0.11);
}

.pricing-grid .btn { width: 100%; margin-top: 20px; }

.faq-list {
  display: grid;
  gap: 12px;
  max-width: 820px;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0 18px;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 650;
  padding: 16px 0;
  list-style: none;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: "+";
  float: right;
  color: var(--muted);
  font-weight: 700;
}

.faq-item[open] summary::after { content: "−"; }

.faq-item p {
  margin: 0 0 16px;
  color: var(--muted);
}

.site-footer {
  background: #0b1020;
  color: #9aa8bb;
  padding: 34px 0;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.footer-inner .brand { color: #ffffff; }
.footer-inner p { margin: 0; }
.footer-inner a { color: #cbd5e1; }

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links a {
  font-size: 14px;
  font-weight: 600;
}

.footer-links a:hover { color: #ffffff; }

@media (max-width: 980px) {
  .nav-desktop { display: none; }
  .menu-toggle { display: block; }
  .hero-grid,
  .workflow-grid,
  .split,
  .beta-panel,
  .contact-panel {
    grid-template-columns: 1fr;
  }
  .hero-visual { min-height: auto; }
  .value-grid,
  .outcome-grid,
  .runtime-grid,
  .pricing-grid {
    grid-template-columns: 1fr 1fr;
  }
  .hero-bottom { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .container { width: min(100% - 24px, var(--max)); }
  .hero { padding-top: 54px; }
  .value-grid,
  .outcome-grid,
  .runtime-grid,
  .pricing-grid,
  .security-list,
  .form-row.cols-2 {
    grid-template-columns: 1fr;
  }
  .metric-card { display: none; }
  h1 { font-size: 38px; }
  .section { padding: 64px 0; }
  .beta-copy,
  .contact-copy { padding: 24px; }
  .hero-actions .btn {
    min-width: 136px;
  }
}