:root {
  color-scheme: dark;
  --night: #03050e;
  --ink: #070c1a;
  --raised: #0c1226;
  --paper: #f1f4fa;
  --paper-ink: #111827;
  --muted: #9ba8bd;
  --muted-dark: #5d687a;
  --line: rgba(164, 181, 216, 0.2);
  --line-dark: rgba(17, 24, 39, 0.14);
  --blue: #4f78ff;
  --indigo: #7b61ff;
  --cyan: #38bdf8;
  --amber: #ffcf66;
  --success: #7ee2b8;
  --display: "Bahnschrift SemiCondensed", "Microsoft YaHei", "PingFang SC", sans-serif;
  --body: "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  --mono: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  --shell: 1120px;
  --shadow: 0 26px 70px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--night);
  color: #f8fbff;
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  content: "";
  background:
    radial-gradient(circle at 82% 5%, rgba(79, 120, 255, 0.18), transparent 30%),
    linear-gradient(rgba(56, 189, 248, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.025) 1px, transparent 1px),
    var(--night);
  background-size: auto, 48px 48px, 48px 48px, auto;
}

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

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

button {
  font: inherit;
}

img {
  display: block;
  max-width: 100%;
}

.shell {
  width: min(calc(100% - 36px), var(--shell));
  margin-inline: auto;
}

.skipLink {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: 10px 14px;
  background: var(--paper);
  color: var(--paper-ink);
  transform: translateY(-160%);
}

.skipLink:focus {
  transform: translateY(0);
}

:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 3px;
}

.siteHeader {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--line);
  background: rgba(3, 5, 14, 0.9);
  backdrop-filter: blur(18px);
}

.headerInner {
  display: flex;
  min-height: 74px;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brandMark {
  width: 65px;
  height: 34px;
  object-fit: contain;
  opacity: 0.94;
  filter: drop-shadow(0 0 12px rgba(79, 120, 255, 0.46));
}

.brandText {
  display: grid;
  line-height: 1.2;
}

.brandText strong {
  font-family: var(--display);
  font-size: 17px;
  letter-spacing: 0.04em;
}

.brandText small {
  margin-top: 5px;
  color: var(--muted);
  font: 11px/1 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.headerNav {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-left: auto;
}

.headerNav a {
  color: #c9d2e2;
  font-size: 14px;
  transition: color 180ms ease;
}

.headerNav a:hover {
  color: #fff;
}

.button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 700;
  line-height: 1.2;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button--small {
  min-height: 40px;
  padding-inline: 17px;
  font-size: 14px;
}

.button--solid {
  background: var(--blue);
  color: #03050e;
}

.button--solid:hover {
  background: #6f91ff;
}

.button--line {
  border-color: rgba(203, 214, 237, 0.38);
  background: rgba(255, 255, 255, 0.025);
  color: #f7f9fd;
}

.button--line:hover {
  border-color: var(--cyan);
  background: rgba(56, 189, 248, 0.06);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 96px 0 104px;
}

.hero::after {
  position: absolute;
  top: 36px;
  right: max(-15vw, -180px);
  z-index: -1;
  width: 520px;
  height: 520px;
  border: 1px solid rgba(79, 120, 255, 0.16);
  border-radius: 50%;
  content: "";
  box-shadow: 0 0 0 80px rgba(79, 120, 255, 0.025), 0 0 0 160px rgba(56, 189, 248, 0.018);
}

.heroGrid {
  display: grid;
  align-items: center;
  gap: 72px;
  grid-template-columns: minmax(0, 1.1fr) minmax(360px, 0.9fr);
}

.eyebrow,
.sectionKicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 20px;
  color: var(--cyan);
  font: 700 12px/1.3 var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.eyebrow span {
  width: 28px;
  height: 1px;
  background: currentColor;
}

.hero h1 {
  max-width: 720px;
  margin: 0;
  font-family: var(--display);
  font-size: clamp(42px, 6.4vw, 76px);
  font-stretch: condensed;
  font-weight: 750;
  letter-spacing: -0.055em;
  line-height: 1.04;
}

.hero h1 em {
  position: relative;
  color: #f8fbff;
  font-style: normal;
  white-space: nowrap;
}

.hero h1 em::after {
  position: absolute;
  right: 0;
  bottom: -5px;
  left: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  content: "";
}

.heroLead {
  max-width: 660px;
  margin: 30px 0 0;
  color: #b8c3d6;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.85;
}

.heroOffer {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-top: 34px;
  padding: 20px 0;
  border-block: 1px solid var(--line);
}

.priceBlock {
  display: flex;
  min-width: 150px;
  align-items: baseline;
  gap: 12px;
}

.priceBlock span {
  color: var(--muted);
  font-size: 13px;
}

.priceBlock strong {
  font: 750 40px/1 var(--display);
  letter-spacing: -0.035em;
}

.priceBlock b {
  margin-right: 2px;
  color: var(--amber);
  font: 700 20px/1 var(--mono);
}

.offerFacts {
  display: flex;
  flex-wrap: wrap;
  gap: 9px 18px;
  color: #d5dcec;
  font-size: 13px;
}

.offerFacts span::before {
  margin-right: 7px;
  color: var(--success);
  content: "•";
}

.heroActions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.safetyNote {
  margin: 17px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.auditPanel {
  position: relative;
  min-height: 500px;
  overflow: hidden;
  border: 1px solid rgba(147, 164, 205, 0.27);
  background: linear-gradient(165deg, rgba(21, 28, 45, 0.96), rgba(9, 13, 24, 0.96));
  box-shadow: var(--shadow);
}

.auditPanel::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  content: "";
  background: linear-gradient(90deg, transparent 49.8%, rgba(56, 189, 248, 0.07) 50%, transparent 50.2%);
}

.auditPanel__head,
.auditPanel__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  color: var(--muted);
  font: 700 10px/1.4 var(--mono);
  letter-spacing: 0.08em;
}

.auditPanel__head {
  border-bottom: 1px solid var(--line);
}

.auditPanel__foot {
  border-top: 1px solid var(--line);
}

.liveDot {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 14px rgba(126, 226, 184, 0.7);
}

.auditTrace {
  position: absolute;
  top: 58px;
  right: 0;
  left: 0;
  z-index: 2;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  box-shadow: 0 0 18px rgba(56, 189, 248, 0.72);
  animation: trace 5.6s cubic-bezier(0.6, 0.05, 0.26, 1) infinite;
}

@keyframes trace {
  0%, 12% { transform: translateY(0); opacity: 0; }
  18% { opacity: 1; }
  72% { opacity: 1; }
  82%, 100% { transform: translateY(382px); opacity: 0; }
}

.auditList {
  margin: 0;
  padding: 12px 20px;
}

.auditList > div {
  position: relative;
  display: grid;
  align-items: center;
  gap: 8px 12px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(164, 181, 216, 0.12);
  grid-template-columns: 86px minmax(0, 1fr) auto;
}

.auditList > div:last-child {
  border-bottom: 0;
}

.auditList dt {
  color: var(--cyan);
  font: 700 11px/1.35 var(--mono);
}

.auditList dd {
  margin: 0;
  color: #dce4f3;
  font-size: 14px;
}

.auditList span {
  padding: 4px 7px;
  border: 1px solid rgba(126, 226, 184, 0.26);
  color: var(--success);
  font: 700 9px/1 var(--mono);
}

.section {
  padding: 104px 0;
}

.section--light {
  background: var(--paper);
  color: var(--paper-ink);
}

.sectionIntro {
  display: grid;
  gap: 20px 48px;
  grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.8fr);
}

.sectionIntro .sectionKicker {
  grid-column: 1 / -1;
  margin-bottom: -4px;
  color: var(--blue);
}

.sectionIntro h2,
.scopeTitle h2,
.sampleCopy h2,
.faqTitle h2,
.contactBox h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(34px, 4.5vw, 56px);
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.sectionIntro > p:last-child,
.scopeTitle > p:last-child,
.sampleCopy > p,
.contactBox > div > p:last-child {
  margin: 0;
  color: var(--muted-dark);
  font-size: 17px;
  line-height: 1.85;
}

.deliverableGrid {
  display: grid;
  margin-top: 64px;
  border-block: 1px solid var(--line-dark);
  grid-template-columns: repeat(3, 1fr);
}

.deliverable {
  min-height: 260px;
  padding: 34px 34px 38px 0;
}

.deliverable + .deliverable {
  padding-left: 34px;
  border-left: 1px solid var(--line-dark);
}

.deliverable--focus {
  position: relative;
}

.deliverable--focus::after {
  position: absolute;
  right: 34px;
  bottom: -1px;
  left: 34px;
  height: 4px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  content: "";
}

.deliverable__label {
  color: var(--blue);
  font: 700 11px/1 var(--mono);
  letter-spacing: 0.1em;
}

.deliverable h3 {
  margin: 42px 0 14px;
  font-family: var(--display);
  font-size: 25px;
  letter-spacing: -0.02em;
}

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

.section--dark {
  background: #0a0e18;
}

.scopeGrid {
  display: grid;
  gap: 70px;
  grid-template-columns: minmax(250px, 0.68fr) minmax(0, 1.32fr);
}

.scopeTitle {
  position: sticky;
  top: 118px;
  align-self: start;
}

.scopeTitle > p:last-child {
  margin-top: 24px;
  color: var(--muted);
}

.scopeColumns {
  border-top: 1px solid var(--line);
}

.scopeColumns article {
  padding: 38px 0;
  border-bottom: 1px solid var(--line);
}

.scopeColumns h3 {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 22px;
  font-size: 20px;
}

.scopeColumns h3 span {
  display: grid;
  width: 27px;
  height: 27px;
  place-items: center;
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: var(--cyan);
  font: 700 13px/1 var(--mono);
}

.scopeColumns ul {
  display: grid;
  margin: 0;
  padding: 0;
  gap: 13px 28px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  list-style: none;
}

.scopeColumns li {
  position: relative;
  padding-left: 17px;
  color: #b9c4d6;
  font-size: 14px;
}

.scopeColumns li::before {
  position: absolute;
  top: 0.73em;
  left: 0;
  width: 5px;
  height: 1px;
  background: var(--blue);
  content: "";
}

.section--sample {
  background: #101625;
}

.sampleGrid {
  display: grid;
  align-items: center;
  gap: 86px;
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.28fr);
}

.sampleCover {
  position: relative;
  display: block;
  width: min(100%, 430px);
  margin-inline: auto;
  padding: 12px;
  border: 1px solid rgba(164, 181, 216, 0.25);
  background: rgba(255, 255, 255, 0.035);
  box-shadow: var(--shadow);
  transition: transform 180ms ease, border-color 180ms ease;
}

.sampleCover:hover {
  border-color: var(--cyan);
  transform: translateY(-5px) rotate(-0.35deg);
}

.sampleCover img {
  width: 100%;
  background: #fff;
}

.sampleCover span {
  position: absolute;
  right: 24px;
  bottom: 24px;
  padding: 9px 12px;
  background: var(--night);
  color: #fff;
  font-size: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.sampleCopy > p {
  max-width: 650px;
  margin-top: 28px;
  color: #aeb9cd;
}

.sampleFacts {
  display: grid;
  margin: 38px 0 28px;
  border-block: 1px solid var(--line);
  grid-template-columns: repeat(4, 1fr);
}

.sampleFacts div {
  padding: 19px 14px 19px 0;
}

.sampleFacts div + div {
  padding-left: 14px;
  border-left: 1px solid var(--line);
}

.sampleFacts dt {
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 12px;
}

.sampleFacts dd {
  margin: 0;
  font-weight: 700;
}

.textLink {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  border-bottom: 1px solid var(--cyan);
  color: var(--cyan);
  font-weight: 700;
}

.section--process {
  background: var(--paper);
  color: var(--paper-ink);
}

.sectionIntro--compact {
  display: block;
}

.sectionIntro--compact .sectionKicker {
  margin-bottom: 20px;
}

.processList {
  display: grid;
  margin: 60px 0 0;
  padding: 0;
  border-top: 1px solid var(--line-dark);
  grid-template-columns: repeat(4, 1fr);
  list-style: none;
}

.processList li {
  min-height: 250px;
  padding: 26px 28px 30px 0;
  border-bottom: 1px solid var(--line-dark);
}

.processList li + li {
  padding-left: 28px;
  border-left: 1px solid var(--line-dark);
}

.processList > li > span {
  color: var(--blue);
  font: 750 40px/1 var(--display);
  letter-spacing: -0.04em;
}

.processList h3 {
  margin: 48px 0 11px;
  font-size: 20px;
}

.processList p {
  margin: 0;
  color: var(--muted-dark);
  font-size: 14px;
}

.section--faq {
  background: #0b101b;
}

.faqGrid {
  display: grid;
  gap: 76px;
  grid-template-columns: minmax(240px, 0.65fr) minmax(0, 1.35fr);
}

.faqTitle {
  align-self: start;
}

.faqList {
  border-top: 1px solid var(--line);
}

.faqList details {
  border-bottom: 1px solid var(--line);
}

.faqList summary {
  position: relative;
  padding: 25px 44px 25px 0;
  cursor: pointer;
  font-size: 18px;
  font-weight: 700;
  list-style: none;
}

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

.faqList summary::after {
  position: absolute;
  top: 24px;
  right: 4px;
  color: var(--cyan);
  content: "+";
  font: 400 26px/1 var(--mono);
}

.faqList details[open] summary::after {
  content: "−";
}

.faqList details p {
  max-width: 760px;
  margin: -4px 0 25px;
  color: var(--muted);
}

.contactSection {
  padding: 78px 0;
  background: linear-gradient(100deg, #365ad1, var(--blue) 52%, #357ca4);
}

.contactBox {
  display: grid;
  align-items: center;
  gap: 40px;
  grid-template-columns: minmax(0, 1.2fr) minmax(270px, 0.8fr);
}

.contactBox .sectionKicker,
.contactBox > div > p:last-child {
  color: rgba(255, 255, 255, 0.82);
}

.contactBox .button--solid {
  background: #fff;
  color: #18306f;
}

.contactBox .button--line {
  border-color: rgba(255, 255, 255, 0.65);
  background: transparent;
}

.contactActions {
  display: grid;
  gap: 10px;
}

.contactTel {
  justify-self: center;
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 13px;
}

.siteFooter {
  padding: 44px 0;
  border-top: 1px solid var(--line);
  background: var(--night);
}

.footerInner {
  display: grid;
  align-items: center;
  gap: 20px;
  grid-template-columns: 1fr auto;
}

.footerBrand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footerBrand > img {
  width: 65px;
  height: 34px;
  object-fit: contain;
  opacity: 0.9;
  filter: drop-shadow(0 0 10px rgba(79, 120, 255, 0.34));
}

.footerBrand > div {
  display: grid;
  gap: 5px;
}

.footerBrand span,
.footerInner small {
  color: var(--muted);
  font-size: 12px;
}

.footerLinks {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px 22px;
  color: #c7d0df;
  font-size: 13px;
}

.footerLinks a:hover {
  color: var(--cyan);
}

.footerInner small {
  grid-column: 1 / -1;
}

.wechatDialog {
  width: min(calc(100% - 28px), 420px);
  padding: 34px;
  border: 1px solid rgba(164, 181, 216, 0.3);
  border-radius: 6px;
  background: #111827;
  color: #fff;
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.6);
}

.wechatDialog::backdrop {
  background: rgba(3, 5, 11, 0.78);
  backdrop-filter: blur(6px);
}

.dialogClose {
  position: absolute;
  top: 12px;
  right: 14px;
  width: 38px;
  height: 38px;
  border: 0;
  background: transparent;
  color: #b8c3d6;
  cursor: pointer;
  font-size: 29px;
}

.wechatDialog h2 {
  margin: 0 0 22px;
  font-family: var(--display);
  font-size: 27px;
  line-height: 1.25;
}

.wechatDialog img {
  width: 210px;
  height: 286px;
  margin-inline: auto;
  object-fit: cover;
}

.wechatId {
  margin: 20px 0 14px;
  text-align: center;
}

.wechatDialog .button {
  width: 100%;
}

.copyStatus {
  min-height: 24px;
  margin: 10px 0 0;
  color: var(--success);
  text-align: center;
  font-size: 13px;
}

@media (max-width: 920px) {
  .headerNav {
    display: none;
  }

  .hero {
    padding-top: 72px;
  }

  .heroGrid,
  .scopeGrid,
  .sampleGrid,
  .faqGrid {
    gap: 52px;
    grid-template-columns: 1fr;
  }

  .auditPanel {
    width: min(100%, 620px);
    min-height: auto;
  }

  .scopeTitle {
    position: static;
  }

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

  .processList li:nth-child(3) {
    padding-left: 0;
    border-left: 0;
  }
}

@media (max-width: 700px) {
  .shell {
    width: min(calc(100% - 28px), var(--shell));
  }

  .siteHeader .button {
    display: none;
  }

  .headerInner {
    min-height: 66px;
  }

  .brandMark {
    width: 56px;
    height: 30px;
  }

  .hero {
    padding: 58px 0 72px;
  }

  .hero h1 {
    font-size: clamp(40px, 13vw, 58px);
  }

  .hero h1 em {
    white-space: normal;
  }

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

  .heroActions,
  .heroActions .button {
    width: 100%;
  }

  .auditList > div {
    grid-template-columns: 76px minmax(0, 1fr);
  }

  .auditList span {
    display: none;
  }

  .section {
    padding: 78px 0;
  }

  .sectionIntro,
  .contactBox {
    grid-template-columns: 1fr;
  }

  .deliverableGrid,
  .sampleFacts {
    grid-template-columns: 1fr;
  }

  .deliverable {
    min-height: auto;
    padding: 28px 0;
  }

  .deliverable + .deliverable {
    padding-left: 0;
    border-top: 1px solid var(--line-dark);
    border-left: 0;
  }

  .deliverable--focus::after {
    right: 0;
    left: 0;
  }

  .deliverable h3 {
    margin-top: 22px;
  }

  .scopeColumns ul {
    grid-template-columns: 1fr;
  }

  .sampleFacts div,
  .sampleFacts div + div {
    display: flex;
    justify-content: space-between;
    padding: 13px 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .sampleFacts div:first-child {
    border-top: 0;
  }

  .processList {
    grid-template-columns: 1fr;
  }

  .processList li,
  .processList li + li,
  .processList li:nth-child(3) {
    display: grid;
    min-height: auto;
    gap: 20px;
    padding: 24px 0;
    border-left: 0;
    grid-template-columns: 58px 1fr;
  }

  .processList h3 {
    margin-top: 0;
  }

  .footerInner {
    grid-template-columns: 1fr;
  }

  .footerLinks {
    justify-content: flex-start;
  }

  .footerInner small {
    grid-column: auto;
  }

  .wechatDialog {
    padding: 30px 22px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}