:root {
  color: #202124;
  background: #ffffff;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
  --ink: #202124;
  --muted: #65666a;
  --line: #e7e5e2;
  --soft: #f7f7f5;
  --red: #b42318;
  --red-dark: #8f1d14;
  --orange: #ed6c1d;
  --warm: #fff7f0;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: #fff;
}

a {
  color: inherit;
}

button,
input {
  font: inherit;
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 68px;
  padding: 10px max(24px, calc((100% - 1180px) / 2));
  border-bottom: 1px solid rgba(231, 229, 226, 0.9);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #242424;
  font-size: 16px;
  font-weight: 750;
  text-decoration: none;
}

.brand img {
  display: block;
}

nav {
  display: flex;
  align-items: center;
  gap: 30px;
}

nav a {
  color: #55565a;
  font-size: 14px;
  text-decoration: none;
}

nav a:hover {
  color: var(--red);
}

nav .nav-action {
  padding: 9px 15px;
  border: 1px solid var(--red);
  border-radius: 5px;
  color: #fff;
  background: var(--red);
  font-weight: 650;
}

nav .nav-action:hover {
  color: #fff;
  background: var(--red-dark);
}

.hero {
  position: relative;
  min-height: 590px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.hero::before {
  position: absolute;
  right: max(24px, calc((100% - 1180px) / 2));
  bottom: 52px;
  width: 370px;
  height: 230px;
  border: 1px solid #eee9e5;
  background: #fffaf6;
  content: "";
  pointer-events: none;
  transform: rotate(-3deg);
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding-top: 54px;
}

.eyebrow,
.section-index {
  margin: 0 0 18px;
  color: var(--red);
  font-size: 13px;
  font-weight: 750;
  letter-spacing: 0;
}

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

.eyebrow span {
  width: 28px;
  height: 3px;
  background: var(--orange);
}

.hero h1 {
  max-width: 720px;
  margin: 0;
  color: #191919;
  font-size: 58px;
  font-weight: 790;
  line-height: 1.12;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 680px;
  margin: 24px 0 0;
  color: #525357;
  font-size: 18px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: 5px;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 140ms ease, background 140ms ease, border-color 140ms ease;
}

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

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

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

.button-secondary {
  border-color: #c9c7c3;
  color: #36373a;
  background: #fff;
}

.button-secondary:hover {
  border-color: var(--orange);
  color: var(--red);
}

.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin: 24px 0 0;
  padding: 0;
  color: #6a6b6e;
  font-size: 13px;
  list-style: none;
}

.hero-trust li::before {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--orange);
  content: "";
  vertical-align: 1px;
}

.hero-mark {
  position: absolute;
  z-index: 1;
  right: max(82px, calc((100% - 1060px) / 2));
  bottom: 58px;
  display: grid;
  place-items: center;
  width: 178px;
  height: 178px;
  border: 6px double var(--red);
  border-radius: 50%;
  color: var(--red);
  background: rgba(255, 255, 255, 0.72);
  transform: rotate(9deg);
}

.hero-mark::before,
.hero-mark::after {
  position: absolute;
  width: 18px;
  height: 18px;
  color: var(--orange);
  content: "★";
  font-size: 15px;
  text-align: center;
}

.hero-mark::before {
  top: 18px;
}

.hero-mark::after {
  bottom: 18px;
}

.hero-mark span {
  align-self: end;
  font-size: 14px;
  font-weight: 800;
}

.hero-mark strong {
  font-size: 34px;
  line-height: 1;
}

.hero-mark small {
  align-self: start;
  font-size: 12px;
  font-weight: 750;
}

.proof-band {
  border-bottom: 1px solid var(--line);
  background: var(--soft);
}

.proof-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
}

.proof-inner p {
  margin: 0;
  padding: 22px 20px;
  border-right: 1px solid var(--line);
  color: #444548;
  font-size: 14px;
  text-align: center;
}

.proof-inner p:first-child {
  border-left: 1px solid var(--line);
}

.section {
  padding: 104px max(24px, calc((100% - 1180px) / 2));
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  column-gap: 72px;
  align-items: end;
  margin-bottom: 46px;
}

.section-head .section-index {
  grid-column: 1 / -1;
}

.section h2,
.final-cta h2 {
  margin: 0;
  color: #1c1c1d;
  font-size: 38px;
  font-weight: 770;
  line-height: 1.25;
  letter-spacing: 0;
}

.section-head > p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.feature-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 16px;
}

.feature-card {
  position: relative;
  min-height: 270px;
  overflow: hidden;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}

.feature-card-main {
  grid-row: span 2;
  min-height: 556px;
  background: var(--warm);
}

.feature-card-wide {
  grid-column: 1 / -1;
  min-height: 230px;
  background: #f8f8f7;
}

.feature-number {
  margin: 0 0 28px;
  color: var(--orange);
  font-size: 12px;
  font-weight: 750;
}

.feature-card h3,
.step-list h3 {
  margin: 0;
  font-size: 23px;
  line-height: 1.35;
}

.feature-card > p:not(.feature-number) {
  max-width: 520px;
  margin: 13px 0 0;
  color: var(--muted);
  line-height: 1.75;
}

.stamp-demo {
  position: absolute;
  right: 44px;
  bottom: 50px;
  left: 44px;
  height: 238px;
  border: 1px solid #dedbd6;
  background: #fff;
}

.stamp-demo::before,
.stamp-demo::after {
  position: absolute;
  right: 34px;
  left: 34px;
  height: 1px;
  background: #eceae6;
  content: "";
}

.stamp-demo::before {
  top: 58px;
}

.stamp-demo::after {
  top: 88px;
}

.stamp-ring {
  position: absolute;
  right: 54px;
  bottom: 34px;
  display: grid;
  place-items: center;
  width: 112px;
  height: 112px;
  border: 5px double var(--red);
  border-radius: 50%;
  color: var(--red);
  font-size: 13px;
  font-weight: 800;
  transform: rotate(-9deg);
}

.signature {
  position: absolute;
  bottom: 54px;
  left: 44px;
  color: #313236;
  font-family: "STKaiti", "KaiTi", serif;
  font-size: 37px;
  transform: rotate(-5deg);
}

.page-slices {
  position: absolute;
  right: 26px;
  bottom: 24px;
  display: flex;
  align-items: flex-end;
  gap: 5px;
}

.page-slices span {
  display: block;
  width: 36px;
  height: 72px;
  border: 1px solid #d9d6d1;
  border-right: 4px solid var(--red);
  background: #fff;
}

.page-slices span:nth-child(2) {
  height: 82px;
}

.page-slices span:nth-child(3) {
  height: 92px;
}

.page-slices span:nth-child(4) {
  height: 102px;
}

.checker-demo {
  position: absolute;
  right: 26px;
  bottom: 24px;
  display: grid;
  place-items: center;
  width: 146px;
  height: 82px;
  border: 1px solid #ddd9d3;
  background-color: #fff;
  background-image: linear-gradient(45deg, #ebe9e5 25%, transparent 25%),
    linear-gradient(-45deg, #ebe9e5 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #ebe9e5 75%),
    linear-gradient(-45deg, transparent 75%, #ebe9e5 75%);
  background-position: 0 0, 0 9px, 9px -9px, -9px 0;
  background-size: 18px 18px;
}

.checker-demo span {
  padding: 5px 8px;
  color: var(--red);
  background: rgba(255, 255, 255, 0.9);
  font-size: 12px;
  font-weight: 750;
}

.export-demo {
  position: absolute;
  right: 42px;
  bottom: 50%;
  display: flex;
  align-items: center;
  gap: 18px;
  transform: translateY(50%);
}

.export-demo span,
.export-demo strong {
  display: grid;
  place-items: center;
  width: 96px;
  height: 74px;
  border: 1px solid #d9d6d1;
  background: #fff;
}

.export-demo span {
  color: #68696c;
  font-size: 16px;
}

.export-demo strong {
  border-color: rgba(180, 35, 24, 0.3);
  color: var(--red);
}

.export-demo i {
  color: var(--orange);
  font-size: 24px;
  font-style: normal;
}

.steps {
  color: #fff;
  background: #242323;
}

.section-head-light {
  display: block;
}

.section-head-light h2 {
  color: #fff;
}

.steps .section-index {
  color: #ff8a43;
}

.step-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 58px 0 44px;
  padding: 0;
  border-top: 1px solid #4a4847;
  list-style: none;
}

.step-list li {
  min-height: 220px;
  padding: 30px 24px 22px 0;
  border-right: 1px solid #4a4847;
}

.step-list li:not(:first-child) {
  padding-left: 24px;
}

.step-list li:last-child {
  border-right: none;
}

.step-list > li > span {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 38px;
  border: 1px solid #6c6967;
  border-radius: 50%;
  color: #ff8a43;
  font-size: 13px;
}

.step-list h3 {
  color: #fff;
  font-size: 20px;
}

.step-list p {
  margin: 12px 0 0;
  color: #bdb9b6;
  font-size: 14px;
  line-height: 1.7;
}

.button-light {
  color: #252323;
  background: #fff;
}

.button-light:hover {
  background: #fff5ee;
}

.privacy {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 0.9fr);
  gap: 90px;
  align-items: center;
  background: var(--warm);
}

.privacy-copy > p:not(.section-index):not(.privacy-note) {
  max-width: 650px;
  margin: 24px 0 0;
  color: #5b5a59;
  font-size: 17px;
  line-height: 1.85;
}

.privacy-note {
  margin: 20px 0 0;
  color: var(--red);
  font-size: 13px;
}

.privacy-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid #e4d6cb;
  border-bottom: 1px solid #e4d6cb;
}

.privacy-facts div {
  display: grid;
  gap: 8px;
  padding: 34px 18px;
  border-right: 1px solid #e4d6cb;
  text-align: center;
}

.privacy-facts div:last-child {
  border-right: none;
}

.privacy-facts strong {
  color: var(--red);
  font-size: 29px;
}

.privacy-facts span {
  color: #666260;
  font-size: 13px;
}

.faq {
  background: #fff;
}

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

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

.faq-list summary {
  position: relative;
  padding: 24px 52px 24px 2px;
  cursor: pointer;
  font-size: 17px;
  font-weight: 700;
  list-style: none;
}

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

.faq-list summary::after {
  position: absolute;
  top: 20px;
  right: 6px;
  color: var(--orange);
  content: "+";
  font-size: 24px;
  font-weight: 400;
}

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

.faq-list details p {
  max-width: 820px;
  margin: -4px 0 24px;
  color: var(--muted);
  line-height: 1.75;
}

.final-cta {
  display: grid;
  justify-items: center;
  padding: 86px 24px 96px;
  border-top: 1px solid var(--line);
  background: var(--soft);
  text-align: center;
}

.final-cta > p {
  margin: 0 0 14px;
  color: var(--orange);
  font-size: 14px;
  font-weight: 750;
}

.final-cta .button {
  margin-top: 30px;
}

footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  padding: 42px max(24px, calc((100% - 1180px) / 2));
  color: #c9c6c3;
  background: #1c1b1b;
}

footer span {
  color: #fff;
  font-weight: 750;
}

footer p {
  margin: 8px 0 0;
  font-size: 13px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-links a {
  color: #c9c6c3;
  font-size: 13px;
  text-decoration: none;
}

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

@media (max-width: 900px) {
  .site-header {
    padding-right: 18px;
    padding-left: 18px;
  }

  nav a:not(.nav-action) {
    display: none;
  }

  .hero {
    min-height: 590px;
  }

  .hero::before {
    right: -90px;
    bottom: 34px;
    opacity: 0.45;
  }

  .hero-mark {
    right: 30px;
    bottom: 52px;
    opacity: 0.6;
  }

  .hero-inner {
    width: calc(100% - 36px);
    padding-top: 62px;
  }

  .hero h1 {
    font-size: 46px;
  }

  .proof-inner {
    grid-template-columns: 1fr 1fr;
    width: 100%;
  }

  .proof-inner p,
  .proof-inner p:first-child {
    border: none;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .section {
    padding: 78px 24px;
  }

  .section-head {
    grid-template-columns: 1fr;
    row-gap: 20px;
  }

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

  .feature-card-main,
  .feature-card-wide {
    grid-column: auto;
    grid-row: auto;
  }

  .step-list {
    grid-template-columns: 1fr 1fr;
  }

  .step-list li:nth-child(2) {
    border-right: none;
  }

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

@media (max-width: 600px) {
  .brand span {
    max-width: 170px;
    font-size: 14px;
  }

  nav {
    gap: 8px;
  }

  nav .nav-action {
    padding: 8px 11px;
    font-size: 13px;
  }

  .hero {
    min-height: 590px;
  }

  .hero::before,
  .hero-mark {
    display: none;
  }

  .hero-inner {
    padding-top: 48px;
  }

  .hero h1 {
    font-size: 40px;
    line-height: 1.18;
  }

  .hero-lead {
    margin-top: 20px;
    font-size: 16px;
    line-height: 1.75;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
    width: 100%;
    max-width: 360px;
  }

  .hero-trust {
    gap: 8px 16px;
  }

  .proof-inner p {
    padding: 17px 10px;
    font-size: 12px;
  }

  .section {
    padding: 66px 18px;
  }

  .section h2,
  .final-cta h2 {
    font-size: 31px;
  }

  .section-head {
    margin-bottom: 34px;
  }

  .feature-card {
    min-height: 280px;
    padding: 22px;
  }

  .feature-card-main {
    min-height: 500px;
  }

  .feature-card h3 {
    font-size: 21px;
  }

  .stamp-demo {
    right: 22px;
    bottom: 28px;
    left: 22px;
    height: 220px;
  }

  .stamp-ring {
    right: 28px;
  }

  .signature {
    left: 24px;
  }

  .feature-card-wide {
    min-height: 360px;
  }

  .export-demo {
    right: auto;
    bottom: 34px;
    left: 22px;
    transform: none;
  }

  .step-list {
    grid-template-columns: 1fr;
    margin-top: 42px;
  }

  .step-list li,
  .step-list li:not(:first-child) {
    display: grid;
    grid-template-columns: 42px 1fr;
    gap: 14px;
    min-height: 0;
    padding: 24px 0;
    border-right: none;
    border-bottom: 1px solid #4a4847;
  }

  .step-list > li > span {
    margin: 0;
  }

  .privacy-facts {
    grid-template-columns: 1fr;
  }

  .privacy-facts div {
    grid-template-columns: 90px 1fr;
    align-items: center;
    border-right: none;
    border-bottom: 1px solid #e4d6cb;
    text-align: left;
  }

  .privacy-facts div:last-child {
    border-bottom: none;
  }

  .final-cta {
    padding: 68px 18px 74px;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 38px 18px;
  }
}

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

  .button {
    transition: none;
  }
}