:root {
  --ink: #111318;
  --muted: #5c6472;
  --paper: #f7f8fa;
  --white: #ffffff;
  --blue: #1557ff;
  --blue-dark: #0b36a8;
  --yellow: #ffd84d;
  --coral: #ff5b55;
  --cyan: #c9f4f0;
  --line: #1b1f28;
  --max: 1160px;
  --shadow: 6px 6px 0 var(--ink);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0;
}

body.menu-open {
  overflow: hidden;
}

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

a {
  color: inherit;
}

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

[id] {
  scroll-margin-top: 92px;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 8px 12px;
  color: var(--white);
  background: var(--ink);
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 2px solid var(--ink);
  background: var(--white);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  color: var(--ink);
  font-size: 21px;
  font-weight: 900;
  line-height: 1;
  text-decoration: none;
}

.brand img {
  width: 40px;
  height: 40px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}

.site-nav a {
  min-width: 76px;
  padding: 9px 12px;
  text-align: center;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.35;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  background: var(--yellow);
}

.download-link,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 10px 22px;
  border: 2px solid var(--ink);
  font-weight: 900;
  line-height: 1.2;
  text-decoration: none;
  box-shadow: 4px 4px 0 var(--ink);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.download-link {
  color: var(--white);
  background: var(--blue);
}

.button-secondary {
  background: var(--white);
}

.download-link:hover,
.button-secondary:hover {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--ink);
}

.header-download {
  min-height: 42px;
  padding: 8px 16px;
  font-size: 14px;
  box-shadow: 3px 3px 0 var(--ink);
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 2px solid var(--ink);
  color: var(--ink);
  background: var(--yellow);
  cursor: pointer;
}

.menu-toggle span,
.menu-toggle::before,
.menu-toggle::after {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  content: "";
}

.menu-toggle span {
  margin: 4px 0;
}

.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 2px solid var(--ink);
  background: var(--white);
}

.hero::after {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 24%;
  height: 22px;
  background: var(--coral);
  content: "";
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 0.94fr) minmax(420px, 1.06fr);
  align-items: center;
  gap: 58px;
  min-height: 552px;
  padding-block: 48px 52px;
}

.eyebrow,
.section-kicker,
.frame-label,
.route-index {
  display: inline-block;
  margin: 0 0 14px;
  font-size: 13px;
  font-weight: 900;
  line-height: 1.2;
  text-transform: uppercase;
}

.eyebrow,
.section-kicker {
  padding: 5px 9px;
  border: 2px solid var(--ink);
  background: var(--yellow);
}

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

h1,
h2,
h3 {
  line-height: 1.2;
}

h1 {
  max-width: 610px;
  margin-bottom: 20px;
  font-size: 48px;
  font-weight: 950;
}

.hero-lead {
  max-width: 590px;
  margin-bottom: 25px;
  color: #343a45;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-note {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.hero-media {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 420px;
  padding: 24px 24px 32px;
}

.filmstrip {
  position: relative;
  width: 500px;
  height: 392px;
}

.film-frame {
  position: absolute;
  width: 184px;
  padding: 9px 9px 34px;
  border: 2px solid var(--ink);
  background: var(--white);
  box-shadow: var(--shadow);
}

.film-frame img {
  width: 100%;
  height: 286px;
  object-fit: cover;
  object-position: top;
}

.film-frame:nth-child(1) {
  top: 12px;
  left: 0;
  z-index: 3;
  transform: rotate(-4deg);
}

.film-frame:nth-child(2) {
  top: 2px;
  left: 158px;
  z-index: 2;
  transform: rotate(2deg);
}

.film-frame:nth-child(3) {
  top: 30px;
  right: 0;
  z-index: 1;
  transform: rotate(5deg);
}

.frame-label {
  position: absolute;
  right: 10px;
  bottom: 7px;
  margin: 0;
}

.facts-band {
  border-bottom: 2px solid var(--ink);
  background: var(--yellow);
}

.facts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.fact {
  min-height: 112px;
  padding: 20px 26px;
  border-left: 2px solid var(--ink);
}

.fact:last-child {
  border-right: 2px solid var(--ink);
}

.fact strong {
  display: block;
  margin-bottom: 2px;
  font-size: 20px;
}

.fact span {
  color: #343434;
  font-size: 14px;
}

.section {
  padding: 78px 0;
}

.section-blue {
  color: var(--white);
  background: var(--blue-dark);
}

.section-cyan {
  background: var(--cyan);
}

.section-coral {
  background: var(--coral);
}

.section-heading-row {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 34px;
}

.section-heading-row h2,
.section > .container > h2 {
  margin-bottom: 0;
  font-size: 34px;
  font-weight: 950;
}

.section-heading-row .supporting {
  max-width: 580px;
  margin: 0;
  color: var(--muted);
}

.heading-rule {
  display: block;
  width: 42px;
  height: 4px;
  margin: 0 0 14px;
  background: currentColor;
}

.section-blue .supporting {
  color: #dfe6ff;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.feature-item {
  min-height: 250px;
  padding: 26px;
  border: 2px solid var(--ink);
  background: var(--white);
  box-shadow: 5px 5px 0 var(--ink);
}

.feature-number {
  display: grid;
  width: 38px;
  height: 38px;
  margin-bottom: 28px;
  place-items: center;
  border: 2px solid var(--ink);
  background: var(--yellow);
  font-weight: 950;
}

.feature-item h3 {
  margin-bottom: 10px;
  font-size: 21px;
}

.feature-item p {
  margin-bottom: 0;
  color: var(--muted);
}

.gallery-stage {
  display: grid;
  grid-template-columns: 1fr 1.28fr 1fr;
  align-items: end;
  gap: 20px;
  margin-top: 36px;
}

.gallery-shot {
  position: relative;
  margin: 0;
  padding: 12px;
  border: 2px solid var(--ink);
  background: var(--white);
  box-shadow: 6px 6px 0 var(--ink);
}

.gallery-shot img {
  width: 100%;
  max-width: 400px;
  height: auto;
  margin-inline: auto;
}

.gallery-shot figcaption {
  padding: 12px 4px 2px;
  font-weight: 800;
  text-align: center;
}

.gallery-shot:nth-child(2) {
  transform: translateY(-20px);
}

.workflow {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 58px;
  align-items: start;
}

.workflow-intro {
  position: sticky;
  top: 112px;
}

.workflow-intro h2 {
  margin-bottom: 18px;
  font-size: 36px;
  font-weight: 950;
}

.workflow-intro p {
  color: #dfe6ff;
}

.step-list {
  border-top: 2px solid var(--white);
}

.step-item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 2px solid var(--white);
}

.step-item strong {
  font-size: 28px;
  line-height: 1;
  color: var(--yellow);
}

.step-item h3 {
  margin-bottom: 7px;
  font-size: 21px;
}

.step-item p {
  margin-bottom: 0;
  color: #dfe6ff;
}

.route-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 34px;
}

.route-link {
  display: block;
  min-height: 230px;
  padding: 30px;
  border: 2px solid var(--ink);
  background: var(--white);
  box-shadow: var(--shadow);
  text-decoration: none;
}

.route-link:nth-child(2) {
  background: var(--yellow);
}

.route-link h3 {
  max-width: 360px;
  margin: 28px 0 12px;
  font-size: 25px;
}

.route-link p {
  margin-bottom: 0;
  color: #3e4551;
}

.faq-preview {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: 34px;
  border: 2px solid var(--ink);
  background: var(--white);
}

.faq-preview article {
  padding: 26px;
  border-right: 2px solid var(--ink);
}

.faq-preview article:last-child {
  border-right: 0;
}

.faq-preview h3 {
  margin-bottom: 10px;
  font-size: 19px;
}

.faq-preview p {
  margin-bottom: 0;
  color: var(--muted);
}

.bottom-cta {
  padding: 68px 0;
  border-block: 2px solid var(--ink);
  background: var(--yellow);
}

.bottom-cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.bottom-cta h2 {
  margin-bottom: 10px;
  font-size: 34px;
}

.bottom-cta p {
  max-width: 650px;
  margin-bottom: 0;
}

.site-footer {
  padding: 36px 0 30px;
  color: #d8dce6;
  background: var(--ink);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 28px;
  margin-bottom: 22px;
}

.footer-nav a {
  font-weight: 700;
  text-decoration: none;
}

.footer-nav a:hover {
  color: var(--yellow);
}

.disclaimer,
.copyright {
  margin: 0 auto;
  text-align: center;
}

.disclaimer {
  max-width: 820px;
  font-size: 13px;
}

.copyright {
  margin-top: 8px;
  color: #979eac;
  font-size: 13px;
}

.page-hero {
  padding: 64px 0 56px;
  border-bottom: 2px solid var(--ink);
  background: var(--white);
}

.page-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 58px;
  align-items: center;
}

.page-hero h1 {
  margin-bottom: 18px;
  font-size: 44px;
}

.page-hero p {
  max-width: 720px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 18px;
}

.page-marker {
  display: grid;
  min-height: 210px;
  place-items: center;
  border: 2px solid var(--ink);
  background: var(--yellow);
  box-shadow: var(--shadow);
  font-size: 82px;
  font-weight: 950;
  line-height: 1;
}

.toc-band {
  border-bottom: 2px solid var(--ink);
  background: var(--cyan);
}

.toc {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-block: 18px;
}

.toc a {
  padding: 6px 11px;
  border: 1px solid var(--ink);
  background: var(--white);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 58px;
  padding-block: 68px;
}

.article-content section {
  padding: 0 0 54px;
}

.article-content h2 {
  margin-bottom: 20px;
  font-size: 29px;
  font-weight: 950;
}

.article-content h3 {
  margin: 28px 0 10px;
  font-size: 20px;
}

.article-content p,
.article-content li {
  color: #343b47;
}

.article-content ol,
.article-content ul {
  padding-left: 1.4em;
}

.article-content li + li {
  margin-top: 10px;
}

.notice {
  padding: 20px 22px;
  border-left: 7px solid var(--coral);
  background: var(--white);
}

.notice strong {
  display: block;
  margin-bottom: 6px;
}

.article-aside {
  position: sticky;
  top: 104px;
  align-self: start;
  padding: 22px;
  border: 2px solid var(--ink);
  background: var(--yellow);
  box-shadow: 5px 5px 0 var(--ink);
}

.article-aside h2 {
  margin-bottom: 12px;
  font-size: 20px;
}

.article-aside p {
  color: #343434;
}

.article-aside .download-link {
  width: 100%;
}

.check-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 22px 0;
}

.check-item {
  padding: 20px;
  border: 2px solid var(--ink);
  background: var(--white);
}

.check-item strong {
  display: block;
  margin-bottom: 6px;
}

.faq-list {
  border-top: 2px solid var(--ink);
}

.faq-item {
  border-bottom: 2px solid var(--ink);
}

.faq-question {
  display: grid;
  grid-template-columns: 1fr 36px;
  align-items: center;
  width: 100%;
  padding: 21px 0;
  border: 0;
  color: var(--ink);
  background: transparent;
  font: inherit;
  font-size: 18px;
  font-weight: 900;
  text-align: left;
  cursor: pointer;
}

.faq-icon {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border: 2px solid var(--ink);
  background: var(--yellow);
  font-size: 22px;
  line-height: 1;
}

.faq-question[aria-expanded="true"] .faq-icon {
  background: var(--coral);
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 48px 22px 0;
}

.faq-answer[hidden] {
  display: none;
}

.faq-answer p {
  margin-bottom: 0;
}

@media (max-width: 980px) {
  .hero-inner {
    grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
    gap: 24px;
  }

  .filmstrip {
    width: 420px;
    transform: scale(0.9);
  }

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

  .faq-preview article:nth-child(2) {
    border-right: 0;
  }

  .faq-preview article:last-child {
    grid-column: 1 / -1;
    border-top: 2px solid var(--ink);
  }
}

@media (max-width: 760px) {
  .container {
    width: min(calc(100% - 28px), var(--max));
  }

  .header-inner {
    min-height: 62px;
  }

  .brand {
    font-size: 19px;
  }

  .brand img {
    width: 36px;
    height: 36px;
  }

  .menu-toggle {
    display: block;
  }

  .header-download {
    display: none;
  }

  .site-nav {
    position: fixed;
    top: 62px;
    right: 0;
    left: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 14px 18px;
    border-bottom: 2px solid var(--ink);
    background: var(--white);
  }

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

  .site-nav a {
    padding: 13px;
    border-bottom: 1px solid #d8dce5;
    text-align: left;
  }

  .hero-inner {
    display: flex;
    min-height: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 20px;
    padding-block: 28px 30px;
  }

  h1 {
    margin-bottom: 12px;
    font-size: 35px;
  }

  .hero-lead {
    margin-bottom: 18px;
    font-size: 16px;
  }

  .hero-actions {
    flex-wrap: nowrap;
  }

  .hero-actions a {
    flex: 1 1 0;
    min-width: 0;
    padding-inline: 12px;
  }

  .hero-note {
    display: none;
  }

  .hero-media {
    min-height: 222px;
    padding: 0 0 8px;
  }

  .filmstrip {
    width: 100%;
    height: 218px;
    transform: none;
  }

  .film-frame {
    display: none;
  }

  .film-frame:first-child {
    position: relative;
    top: 0;
    left: 50%;
    display: block;
    width: 142px;
    padding: 7px 7px 29px;
    transform: translateX(-50%) rotate(-2deg);
  }

  .film-frame:first-child img {
    height: 176px;
  }

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

  .fact {
    min-height: 92px;
    padding: 13px 10px;
    text-align: center;
  }

  .fact strong {
    font-size: 16px;
  }

  .fact span {
    font-size: 12px;
    line-height: 1.35;
  }

  .section {
    padding: 54px 0;
  }

  .section-heading-row,
  .bottom-cta-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
  }

  .section-heading-row h2,
  .section > .container > h2,
  .bottom-cta h2 {
    font-size: 28px;
  }

  .feature-grid,
  .gallery-stage,
  .workflow,
  .route-grid,
  .faq-preview,
  .page-hero-grid,
  .article-layout,
  .check-grid {
    grid-template-columns: 1fr;
  }

  .feature-item {
    min-height: 0;
  }

  .gallery-stage {
    gap: 22px;
  }

  .gallery-shot {
    width: min(100%, 330px);
    margin-inline: auto;
  }

  .gallery-shot:nth-child(2) {
    transform: none;
  }

  .workflow-intro,
  .article-aside {
    position: static;
  }

  .step-item {
    grid-template-columns: 52px 1fr;
  }

  .route-link {
    min-height: 0;
  }

  .faq-preview article,
  .faq-preview article:nth-child(2),
  .faq-preview article:last-child {
    grid-column: auto;
    border-right: 0;
    border-bottom: 2px solid var(--ink);
    border-top: 0;
  }

  .faq-preview article:last-child {
    border-bottom: 0;
  }

  .bottom-cta {
    padding: 52px 0;
  }

  .bottom-cta .download-link {
    width: 100%;
  }

  .page-hero {
    padding: 42px 0;
  }

  .page-hero-grid {
    gap: 26px;
  }

  .page-hero h1 {
    font-size: 34px;
  }

  .page-marker {
    min-height: 110px;
    font-size: 54px;
  }

  .article-layout {
    gap: 24px;
    padding-block: 48px;
  }

  .article-aside {
    grid-row: 1;
  }
}

@media (max-width: 390px) {
  .hero-inner {
    padding-top: 24px;
  }

  h1 {
    font-size: 32px;
  }

  .hero-media {
    min-height: 190px;
  }

  .filmstrip {
    height: 188px;
  }

  .film-frame:first-child {
    width: 126px;
  }

  .film-frame:first-child img {
    height: 151px;
  }
}

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

  *,
  *::before,
  *::after {
    transition: none !important;
  }
}