:root {
  color-scheme: light;
  --brand: #2563eb;
  --brand-dark: #1748b3;
  --brand-soft: #eef4ff;
  --ink: #111827;
  --muted: #5f6b7a;
  --line: #e5eaf1;
  --surface: #ffffff;
  --background: #f5f7fb;
  --success: #0f8a5f;
  --warning-bg: #fff8e8;
  --warning-line: #f1d58d;
  --radius: 18px;
  --shadow: 0 18px 50px rgba(21, 45, 88, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid rgba(229, 234, 241, 0.9);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
}

.nav {
  display: flex;
  width: min(1120px, calc(100% - 40px));
  min-height: 72px;
  margin: 0 auto;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-weight: 800;
  white-space: nowrap;
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border-radius: 12px;
  background: linear-gradient(145deg, #3b82f6, #1d4ed8);
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.25);
  color: white;
  font-size: 21px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-links a {
  padding: 8px 13px;
  border-radius: 10px;
  color: #465365;
  font-size: 14px;
  font-weight: 650;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  background: var(--brand-soft);
  color: var(--brand);
  text-decoration: none;
}

.hero {
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 88% 15%, rgba(80, 137, 255, 0.15), transparent 30%),
    linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
}

.hero-inner {
  width: min(920px, calc(100% - 40px));
  margin: 0 auto;
  padding: 62px 0 52px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--brand);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.2;
  letter-spacing: -0.035em;
}

.hero-summary {
  max-width: 720px;
  margin: 17px 0 0;
  color: var(--muted);
  font-size: 17px;
}

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

.tag {
  padding: 5px 11px;
  border: 1px solid #dce7fb;
  border-radius: 999px;
  background: #fff;
  color: #526174;
  font-size: 13px;
}

.layout {
  display: grid;
  width: min(1120px, calc(100% - 40px));
  margin: 34px auto 64px;
  grid-template-columns: 220px minmax(0, 1fr);
  align-items: start;
  gap: 28px;
}

.toc {
  position: sticky;
  top: 100px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.toc-title {
  margin: 0 0 10px;
  font-size: 14px;
  font-weight: 800;
}

.toc a {
  display: block;
  padding: 6px 0;
  color: var(--muted);
  font-size: 14px;
}

.document {
  padding: clamp(24px, 4vw, 52px);
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.document section {
  scroll-margin-top: 100px;
}

.document section + section {
  padding-top: 14px;
}

.document h2 {
  margin: 32px 0 12px;
  font-size: 23px;
  line-height: 1.4;
}

.document section:first-child h2 {
  margin-top: 0;
}

.document h3 {
  margin: 20px 0 8px;
  font-size: 17px;
}

.document p,
.document li {
  color: #374151;
}

.document ul,
.document ol {
  padding-left: 1.45em;
}

.document li + li {
  margin-top: 7px;
}

.notice {
  margin: 22px 0;
  padding: 17px 19px;
  border: 1px solid #cfe0ff;
  border-radius: 14px;
  background: var(--brand-soft);
  color: #294263;
}

.notice.warning {
  border-color: var(--warning-line);
  background: var(--warning-bg);
}

.data-table {
  width: 100%;
  margin: 16px 0 26px;
  border-collapse: collapse;
  border: 1px solid var(--line);
  font-size: 14px;
}

.data-table th,
.data-table td {
  padding: 13px 14px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.data-table th {
  background: #f8fafc;
  color: #243246;
}

.contact-grid,
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.contact-card,
.faq-card {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: #fbfcfe;
}

.contact-card strong,
.faq-card strong {
  display: block;
  margin-bottom: 5px;
  color: #1b2a3e;
}

.path {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 7px;
  background: #edf2f7;
  color: #334155;
  font-size: 14px;
}

.button {
  display: inline-flex;
  min-height: 44px;
  margin-top: 8px;
  padding: 0 18px;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
}

.button:hover {
  background: var(--brand-dark);
  text-decoration: none;
}

.site-footer {
  padding: 34px 20px 42px;
  border-top: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  text-align: center;
  font-size: 13px;
}

.footer-links {
  display: flex;
  margin-bottom: 12px;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.site-footer p {
  margin: 3px 0;
}

/* Company website */
.home-page {
  background: #fff;
  color: #10233f;
}

.home-header {
  border-bottom-color: rgba(218, 228, 241, 0.82);
}

.company-mark {
  background: linear-gradient(145deg, #1f6fec, #1747a6);
  font-family: "STKaiti", "KaiTi", serif;
  font-weight: 800;
}

.home-container {
  width: min(1160px, calc(100% - 48px));
  margin: 0 auto;
}

.company-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid #e8eef6;
  background:
    radial-gradient(circle at 86% 14%, rgba(71, 126, 255, 0.19), transparent 28%),
    radial-gradient(circle at 9% 78%, rgba(53, 210, 173, 0.09), transparent 24%),
    linear-gradient(150deg, #f9fbff 0%, #ffffff 42%, #f1f6ff 100%);
}

.company-hero::before {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(23, 92, 211, 0.035) 1px, transparent 1px), linear-gradient(90deg, rgba(23, 92, 211, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  content: "";
  mask-image: linear-gradient(to right, black, transparent 72%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  min-height: 690px;
  grid-template-columns: minmax(0, 1.03fr) minmax(420px, 0.97fr);
  align-items: center;
  gap: 68px;
}

.hero-copy {
  padding: 82px 0 88px;
}

.hero-copy h1 {
  color: #0d203d;
  font-size: clamp(42px, 5vw, 68px);
  line-height: 1.13;
  letter-spacing: -0.055em;
}

.hero-copy h1 span {
  color: var(--brand);
}

.company-summary {
  max-width: 630px;
  margin: 24px 0 0;
  color: #56667d;
  font-size: 18px;
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  margin-top: 34px;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.primary-action {
  min-height: 50px;
  margin: 0;
  padding: 0 23px;
  border-radius: 14px;
  box-shadow: 0 14px 32px rgba(37, 99, 235, 0.22);
}

.text-action {
  color: #294262;
  font-weight: 750;
}

.text-action:hover {
  color: var(--brand);
  text-decoration: none;
}

.trust-row {
  display: flex;
  margin-top: 40px;
  flex-wrap: wrap;
  gap: 12px 26px;
  color: #66758a;
  font-size: 14px;
  font-weight: 650;
}

.trust-row span::before {
  margin-right: 8px;
  color: #15946b;
  content: "✓";
}

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

.visual-orbit {
  position: absolute;
  border: 1px solid rgba(37, 99, 235, 0.13);
  border-radius: 50%;
}

.orbit-one {
  inset: 12px 4px 8px 8px;
}

.orbit-two {
  inset: 72px 64px 68px 68px;
}

.product-preview {
  position: absolute;
  z-index: 2;
  top: 50%;
  left: 50%;
  width: min(390px, calc(100% - 48px));
  padding: 28px;
  transform: translate(-50%, -50%) rotate(-1.5deg);
  border: 1px solid rgba(215, 227, 245, 0.94);
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 35px 80px rgba(32, 76, 151, 0.18);
  backdrop-filter: blur(18px);
}

.preview-top {
  display: flex;
  align-items: center;
  gap: 11px;
  color: #20324d;
  font-weight: 800;
}

.preview-logo {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border-radius: 13px;
  background: linear-gradient(145deg, #3478f6, #1855cf);
  color: #fff;
}

.preview-title {
  margin: 26px 0 16px;
  color: #10233f;
  font-size: 26px;
  font-weight: 850;
}

.preview-progress {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: #e7eef9;
}

.preview-progress span {
  display: block;
  width: 68%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #2972ed, #55a2ff);
}

.preview-grid {
  display: grid;
  margin-top: 24px;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.preview-grid div {
  padding: 16px;
  border: 1px solid #e6edf7;
  border-radius: 16px;
  background: #f9fbfe;
}

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

.preview-grid strong {
  color: #1a3153;
  font-size: 14px;
}

.preview-grid small {
  margin-top: 3px;
  color: #75849a;
  font-size: 11px;
}

.floating-note {
  position: absolute;
  z-index: 3;
  padding: 11px 15px;
  border: 1px solid rgba(215, 227, 245, 0.9);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 16px 34px rgba(29, 71, 139, 0.14);
  color: #38506f;
  font-size: 13px;
  font-weight: 750;
  backdrop-filter: blur(14px);
}

.floating-note span {
  display: inline-grid;
  width: 24px;
  height: 24px;
  margin-right: 7px;
  place-items: center;
  border-radius: 8px;
  background: #eaf2ff;
  color: var(--brand);
}

.note-one {
  top: 74px;
  right: -4px;
}

.note-two {
  bottom: 76px;
  left: 3px;
}

.home-section {
  padding: 104px 0;
}

.section-kicker {
  margin: 0 0 13px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 850;
  letter-spacing: 0.12em;
}

.home-section h2 {
  margin: 0;
  color: #10233f;
  font-size: clamp(32px, 4vw, 48px);
  line-height: 1.25;
  letter-spacing: -0.04em;
}

.about-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  align-items: start;
  gap: 110px;
}

.about-copy {
  padding-top: 24px;
  border-top: 1px solid #dce5f0;
}

.about-copy p {
  margin: 0;
  color: #53647b;
  font-size: 17px;
}

.about-copy p + p {
  margin-top: 20px;
}

.product-section {
  background: #f4f7fb;
}

.section-heading {
  display: flex;
  margin-bottom: 44px;
  align-items: end;
  justify-content: space-between;
  gap: 48px;
}

.section-heading > p {
  max-width: 510px;
  margin: 0 0 4px;
  color: #627188;
  font-size: 16px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  min-height: 285px;
  padding: 28px;
  border: 1px solid #dfe7f2;
  border-radius: 22px;
  background: #fff;
  box-shadow: 0 12px 30px rgba(38, 66, 108, 0.04);
}

.feature-card h3 {
  margin: 58px 0 10px;
  color: #172d4b;
  font-size: 20px;
}

.feature-card p {
  margin: 0;
  color: #67768b;
  font-size: 14px;
  line-height: 1.75;
}

.feature-primary {
  border-color: #1f64dc;
  background: linear-gradient(150deg, #236ce5, #1549a9);
}

.feature-primary h3,
.feature-primary p {
  color: #fff;
}

.feature-primary p {
  opacity: 0.78;
}

.feature-icon {
  display: grid;
  width: 45px;
  height: 45px;
  place-items: center;
  border-radius: 13px;
  background: #edf3fc;
  color: #2863c8;
  font-size: 12px;
  font-weight: 850;
}

.feature-primary .feature-icon {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}

.product-disclaimer {
  margin-top: 24px;
  padding: 17px 20px;
  border: 1px solid #dfe7f2;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.72);
  color: #66758a;
  font-size: 13px;
}

.compact-heading {
  justify-content: flex-start;
}

.principle-grid {
  display: grid;
  margin-top: 44px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.principle-grid article {
  padding: 32px 30px;
  border-top: 1px solid #d8e2ef;
}

.principle-symbol {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border-radius: 15px;
  background: #edf4ff;
  color: var(--brand);
  font-weight: 850;
}

.principle-grid h3 {
  margin: 24px 0 8px;
  color: #172d4b;
  font-size: 21px;
}

.principle-grid p {
  margin: 0;
  color: #66758a;
  font-size: 14px;
}

.contact-section {
  padding-top: 30px;
}

.contact-panel {
  display: grid;
  padding: clamp(34px, 6vw, 72px);
  grid-template-columns: 0.82fr 1.18fr;
  gap: 80px;
  border-radius: 30px;
  background:
    radial-gradient(circle at 12% 10%, rgba(80, 149, 255, 0.3), transparent 32%),
    linear-gradient(145deg, #12386f, #0c2448);
  color: #fff;
  box-shadow: 0 30px 70px rgba(12, 36, 72, 0.2);
}

.light-kicker {
  color: #83b6ff;
}

.contact-panel h2 {
  color: #fff;
}

.contact-intro > p:last-child {
  max-width: 370px;
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.68);
}

.company-details {
  display: grid;
  gap: 0;
}

.company-details div {
  display: grid;
  padding: 15px 0;
  grid-template-columns: 86px minmax(0, 1fr);
  gap: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.company-details div:first-child {
  padding-top: 0;
}

.company-details div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.company-details span {
  color: rgba(255, 255, 255, 0.55);
  font-size: 13px;
}

.company-details strong {
  color: rgba(255, 255, 255, 0.94);
  font-size: 14px;
  font-weight: 650;
  overflow-wrap: anywhere;
}

.company-details a {
  color: #9cc7ff;
}

.company-footer {
  margin-top: 96px;
  padding: 44px 0 34px;
  text-align: left;
}

.footer-inner,
.copyright-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.footer-company strong,
.footer-company span {
  display: block;
}

.footer-company strong {
  color: #24364f;
  font-size: 14px;
}

.footer-company span {
  margin-top: 4px;
  font-size: 11px;
}

.company-footer .footer-links {
  margin: 0;
  justify-content: flex-end;
}

.copyright-row {
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid #e7edf4;
  font-size: 12px;
}

@media (max-width: 980px) {
  .hero-grid {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 0;
  }

  .hero-copy {
    padding: 74px 0 30px;
  }

  .hero-visual {
    min-height: 500px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }

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

  .contact-panel {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

@media (max-width: 780px) {
  .nav {
    width: min(100% - 28px, 1120px);
    min-height: 64px;
  }

  .brand-label {
    display: none;
  }

  .nav-links {
    overflow-x: auto;
  }

  .nav-links a {
    padding: 7px 9px;
    white-space: nowrap;
  }

  .hero-inner,
  .layout {
    width: min(100% - 28px, 920px);
  }

  .hero-inner {
    padding: 42px 0 36px;
  }

  .layout {
    display: block;
    margin-top: 20px;
  }

  .toc {
    display: none;
  }

  .document {
    padding: 24px 19px;
    border-radius: 18px;
  }

  .document h2 {
    font-size: 20px;
  }

  .contact-grid,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .table-scroll {
    overflow-x: auto;
  }

  .data-table {
    min-width: 660px;
  }

  .home-container {
    width: min(100% - 28px, 1160px);
  }

  .home-header .nav-links a:nth-child(1),
  .home-header .nav-links a:nth-child(3) {
    display: none;
  }

  .home-header .brand-label {
    display: inline;
  }

  .hero-copy {
    padding: 58px 0 20px;
  }

  .hero-copy h1 {
    font-size: 42px;
  }

  .company-summary {
    font-size: 16px;
  }

  .trust-row {
    margin-top: 30px;
    gap: 9px 18px;
  }

  .hero-visual {
    min-height: 440px;
  }

  .product-preview {
    width: calc(100% - 18px);
    padding: 22px;
  }

  .floating-note {
    font-size: 11px;
  }

  .note-one {
    top: 30px;
    right: -8px;
  }

  .note-two {
    bottom: 32px;
    left: -7px;
  }

  .home-section {
    padding: 72px 0;
  }

  .section-heading {
    display: block;
  }

  .section-heading > p {
    margin-top: 18px;
  }

  .feature-grid,
  .principle-grid {
    grid-template-columns: 1fr;
  }

  .feature-card {
    min-height: 230px;
  }

  .feature-card h3 {
    margin-top: 38px;
  }

  .principle-grid {
    gap: 0;
  }

  .principle-grid article {
    padding: 28px 8px;
  }

  .contact-section {
    padding-top: 12px;
  }

  .contact-panel {
    width: min(100% - 20px, 1160px);
    gap: 38px;
    border-radius: 24px;
  }

  .company-details div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .company-footer {
    margin-top: 70px;
    padding-right: 0;
    padding-left: 0;
  }

  .footer-inner,
  .copyright-row {
    align-items: flex-start;
    flex-direction: column;
    gap: 18px;
  }

  .company-footer .footer-links {
    justify-content: flex-start;
  }
}

@media print {
  .site-header,
  .toc,
  .site-footer,
  .button {
    display: none;
  }

  body,
  .hero {
    background: white;
  }

  .hero-inner,
  .layout {
    width: 100%;
    margin: 0;
  }

  .hero-inner {
    padding: 0 0 24px;
  }

  .layout {
    display: block;
  }

  .document {
    padding: 0;
    border: 0;
    box-shadow: none;
  }
}