:root {
  --ink: #111318;
  --paper: #fffdf8;
  --white: #ffffff;
  --coral: #ff5a4f;
  --coral-dark: #d93d35;
  --mint: #55e1c1;
  --mint-soft: #dffaf2;
  --yellow: #ffd84d;
  --muted: #62666f;
  --line: #deded8;
  --shadow: 6px 6px 0 var(--ink);
  --container: 1180px;
}

* {
  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;
}

body.menu-open {
  overflow: hidden;
}

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

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

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

button {
  font: inherit;
}

:focus-visible {
  outline: 3px solid var(--mint);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 999;
  transform: translateY(-150%);
  padding: 8px 14px;
  color: var(--white);
  background: var(--ink);
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 2px solid var(--ink);
  background: rgba(255, 253, 248, 0.96);
  backdrop-filter: blur(12px);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 10px;
  font-size: 21px;
  font-weight: 900;
  letter-spacing: 0;
}

.brand img {
  width: 42px;
  height: 42px;
  border: 2px solid var(--ink);
  border-radius: 6px;
}

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

.site-nav > a:not(.btn) {
  padding: 9px 13px;
  border-bottom: 3px solid transparent;
  font-size: 15px;
  font-weight: 700;
}

.site-nav > a:not(.btn):hover,
.site-nav > a[aria-current="page"]:not(.btn) {
  border-color: var(--coral);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--ink);
  border-radius: 4px;
  color: var(--ink);
  background: var(--white);
  cursor: pointer;
}

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

.menu-toggle {
  flex-direction: column;
  gap: 4px;
}

.btn {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  border: 2px solid var(--ink);
  border-radius: 4px;
  font-weight: 900;
  line-height: 1.2;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--ink);
}

.btn-primary {
  color: var(--white);
  background: var(--coral);
}

.btn-dark {
  color: var(--white);
  background: var(--ink);
}

.btn-light {
  color: var(--ink);
  background: var(--white);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  color: var(--coral-dark);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 30px;
  height: 5px;
  background: var(--coral);
  content: "";
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.2;
  letter-spacing: 0;
}

h1 {
  margin-bottom: 22px;
  font-size: clamp(42px, 6vw, 76px);
  font-weight: 950;
}

h2 {
  margin-bottom: 28px;
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 950;
}

h3 {
  margin-bottom: 12px;
  font-size: 21px;
  font-weight: 900;
}

.hero {
  overflow: hidden;
  border-bottom: 2px solid var(--ink);
  background: var(--mint-soft);
}

.hero-grid {
  display: grid;
  min-height: 650px;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  align-items: center;
  gap: 64px;
  padding-block: 62px 54px;
}

.hero-copy > p:not(.eyebrow) {
  max-width: 690px;
  margin: 0 0 26px;
  color: #363a41;
  font-size: 19px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 30px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 30px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  font-weight: 800;
}

.hero-meta li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-meta li::before {
  width: 10px;
  height: 10px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--yellow);
  content: "";
}

.hero-visual {
  position: relative;
  display: flex;
  min-height: 520px;
  align-items: center;
  justify-content: center;
}

.hero-visual::before {
  position: absolute;
  width: min(92%, 430px);
  aspect-ratio: 1;
  border: 3px solid var(--ink);
  border-radius: 50%;
  background: var(--yellow);
  content: "";
}

.phone-shot {
  position: relative;
  z-index: 1;
  width: min(72%, 318px);
  padding: 9px;
  border: 3px solid var(--ink);
  border-radius: 8px;
  background: var(--ink);
  box-shadow: 12px 12px 0 rgba(17, 19, 24, 0.22);
  transform: rotate(2deg);
}

.phone-shot img {
  width: 100%;
  max-width: 318px;
  height: auto;
  border-radius: 3px;
}

.burst {
  position: absolute;
  z-index: 2;
  top: 44px;
  right: 0;
  width: 116px;
  padding: 18px 10px;
  border: 3px solid var(--ink);
  border-radius: 50%;
  background: var(--coral);
  color: var(--white);
  font-size: 16px;
  font-weight: 950;
  line-height: 1.25;
  text-align: center;
  transform: rotate(8deg);
}

.section {
  padding-block: 92px;
}

.section-tight {
  padding-block: 62px;
}

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

.section-coral {
  border-block: 2px solid var(--ink);
  background: var(--coral);
}

.section-mint {
  border-block: 2px solid var(--ink);
  background: var(--mint-soft);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 36px;
}

.section-heading h2 {
  max-width: 760px;
  margin-bottom: 0;
}

.index-mark {
  color: var(--coral);
  font-family: Consolas, Monaco, monospace;
  font-size: 18px;
  font-weight: 800;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 2px solid var(--ink);
  border-left: 2px solid var(--ink);
}

.feature-item {
  min-height: 270px;
  padding: 26px;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  background: var(--white);
}

.feature-number {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  margin-bottom: 44px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--mint);
  font-family: Consolas, Monaco, monospace;
  font-weight: 900;
}

.feature-item:nth-child(2) .feature-number,
.feature-item:nth-child(4) .feature-number {
  background: var(--yellow);
}

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

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

.preview-item {
  margin: 0;
  text-align: center;
}

.preview-frame {
  display: flex;
  min-height: 620px;
  align-items: center;
  justify-content: center;
  padding: 26px;
  border: 2px solid var(--ink);
  border-radius: 6px;
  background: var(--white);
  box-shadow: 7px 7px 0 rgba(17, 19, 24, 0.16);
}

.preview-frame img {
  width: 100%;
  max-width: 318px;
  height: auto;
  border: 1px solid #e4e4df;
}

.preview-item figcaption {
  padding: 20px 10px 0;
  color: #42464f;
  text-align: left;
}

.preview-item strong {
  display: block;
  margin-bottom: 4px;
  color: var(--ink);
  font-size: 18px;
}

.schedule-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.75fr) minmax(0, 1.25fr);
  gap: 48px;
  align-items: start;
}

.schedule-intro {
  position: sticky;
  top: 110px;
}

.schedule-intro p {
  color: #c8cad0;
}

.schedule-list {
  border-top: 1px solid #53565d;
}

.schedule-row {
  display: grid;
  grid-template-columns: 76px 1fr auto;
  align-items: center;
  gap: 18px;
  min-height: 92px;
  border-bottom: 1px solid #53565d;
}

.schedule-day {
  color: var(--mint);
  font-family: Consolas, Monaco, monospace;
  font-size: 13px;
  font-weight: 800;
}

.schedule-row strong {
  font-size: 19px;
}

.schedule-tag {
  padding: 4px 9px;
  border: 1px solid #6d7077;
  border-radius: 3px;
  color: #d8dae0;
  font-size: 12px;
}

.deep-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
}

.deep-link {
  position: relative;
  min-height: 260px;
  padding: 34px;
  border: 2px solid var(--ink);
  border-radius: 6px;
  background: var(--white);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.deep-link:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow);
}

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

.deep-link p {
  max-width: 520px;
  margin: 0;
  color: #3f434b;
}

.deep-link .arrow {
  position: absolute;
  right: 28px;
  bottom: 22px;
  font-size: 34px;
  font-weight: 800;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 2px solid var(--ink);
  background: var(--white);
}

.stat {
  min-height: 158px;
  padding: 28px;
  border-right: 2px solid var(--ink);
}

.stat:last-child {
  border-right: 0;
}

.stat strong {
  display: block;
  margin-bottom: 4px;
  color: var(--coral-dark);
  font-size: 36px;
  line-height: 1.2;
}

.quote-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 28px;
}

.quote {
  margin: 0;
  padding: 26px;
  border-left: 5px solid var(--coral);
  background: var(--white);
}

.quote p {
  margin: 0 0 16px;
}

.quote cite {
  color: var(--muted);
  font-size: 14px;
  font-style: normal;
  font-weight: 800;
}

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

.faq-list details {
  border-bottom: 2px solid var(--ink);
  background: var(--white);
}

.faq-list summary {
  position: relative;
  padding: 22px 56px 22px 18px;
  font-size: 18px;
  font-weight: 900;
  cursor: pointer;
  list-style: none;
}

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

.faq-list summary::after {
  position: absolute;
  top: 50%;
  right: 18px;
  width: 28px;
  height: 28px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  content: "+";
  font-size: 20px;
  line-height: 23px;
  text-align: center;
  transform: translateY(-50%);
}

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

.faq-answer {
  max-width: 900px;
  padding: 0 56px 24px 18px;
  color: #494d55;
}

.faq-answer p {
  margin: 0;
}

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

.bottom-cta-inner {
  display: flex;
  min-height: 230px;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.bottom-cta h2 {
  max-width: 720px;
  margin-bottom: 10px;
}

.bottom-cta p {
  margin: 0;
}

.page-hero {
  border-bottom: 2px solid var(--ink);
  background: var(--mint-soft);
}

.page-hero .container {
  padding-block: 72px 64px;
}

.page-hero h1 {
  max-width: 920px;
  font-size: clamp(38px, 6vw, 68px);
}

.page-hero p:not(.eyebrow) {
  max-width: 790px;
  margin: 0;
  color: #383c44;
  font-size: 19px;
}

.breadcrumb {
  margin-bottom: 24px;
  color: #555962;
  font-size: 14px;
  font-weight: 700;
}

.breadcrumb a:hover {
  color: var(--coral-dark);
}

.content-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 64px;
  align-items: start;
}

.content-main {
  min-width: 0;
}

.content-main section {
  scroll-margin-top: 100px;
  margin-bottom: 72px;
}

.content-main section:last-child {
  margin-bottom: 0;
}

.content-main h2 {
  padding-bottom: 14px;
  border-bottom: 5px solid var(--ink);
  font-size: 34px;
}

.content-main p {
  margin: 0 0 18px;
  color: #3f434b;
}

.side-nav {
  position: sticky;
  top: 110px;
  padding: 22px;
  border: 2px solid var(--ink);
  border-radius: 6px;
  background: var(--white);
  box-shadow: 5px 5px 0 var(--ink);
}

.side-nav strong {
  display: block;
  margin-bottom: 14px;
}

.side-nav a {
  display: block;
  padding: 8px 0;
  border-top: 1px solid var(--line);
  color: #4c5058;
  font-size: 14px;
}

.side-nav a:hover {
  color: var(--coral-dark);
}

.step-list {
  display: grid;
  gap: 18px;
}

.step {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 24px;
  padding: 26px;
  border: 2px solid var(--ink);
  border-radius: 6px;
  background: var(--white);
}

.step-number {
  display: flex;
  width: 64px;
  height: 64px;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--coral);
  color: var(--white);
  font-family: Consolas, Monaco, monospace;
  font-size: 21px;
  font-weight: 900;
}

.step:nth-child(even) .step-number {
  color: var(--ink);
  background: var(--mint);
}

.step h3 {
  margin-top: 4px;
}

.step p:last-child {
  margin-bottom: 0;
}

.check-list,
.plain-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li,
.plain-list li {
  position: relative;
  padding: 12px 0 12px 34px;
  border-bottom: 1px solid var(--line);
}

.check-list li::before {
  position: absolute;
  top: 14px;
  left: 4px;
  width: 17px;
  height: 17px;
  border: 2px solid var(--ink);
  background: var(--mint);
  content: "";
}

.plain-list li::before {
  position: absolute;
  top: 22px;
  left: 7px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--coral);
  content: "";
}

.notice {
  margin: 28px 0;
  padding: 24px;
  border: 2px solid var(--ink);
  border-left: 10px solid var(--yellow);
  border-radius: 4px;
  background: var(--white);
}

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

.notice p:last-child {
  margin-bottom: 0;
}

.feature-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.feature-detail {
  padding: 24px;
  border: 2px solid var(--ink);
  border-radius: 6px;
  background: var(--white);
}

.feature-detail:nth-child(3n + 2) {
  background: var(--mint-soft);
}

.feature-detail:nth-child(3n) {
  background: #fff6cc;
}

.feature-detail p:last-child {
  margin-bottom: 0;
}

.table-wrap {
  overflow-x: auto;
  border: 2px solid var(--ink);
  background: var(--white);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 620px;
}

th,
td {
  padding: 16px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--ink);
  color: var(--white);
}

tr:last-child td {
  border-bottom: 0;
}

.related-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.related-links a {
  padding: 22px;
  border: 2px solid var(--ink);
  border-radius: 4px;
  background: var(--white);
  font-weight: 900;
}

.related-links a:hover {
  background: var(--mint-soft);
}

.site-footer {
  padding-block: 50px 28px;
  color: #c9cbd0;
  background: var(--ink);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr;
  gap: 46px;
  padding-bottom: 36px;
  border-bottom: 1px solid #484b52;
}

.footer-brand .brand {
  margin-bottom: 16px;
  color: var(--white);
}

.footer-brand p,
.footer-note {
  margin: 0;
  color: #aeb1b8;
  font-size: 14px;
}

.footer-title {
  display: block;
  margin-bottom: 14px;
  color: var(--white);
  font-size: 15px;
}

.footer-links a {
  display: block;
  padding: 4px 0;
  color: #c9cbd0;
  font-size: 14px;
}

.footer-links a:hover {
  color: var(--mint);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-top: 24px;
  color: #8f929a;
  font-size: 13px;
}

@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr 0.8fr;
    gap: 24px;
  }

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

  .preview-frame {
    min-height: 500px;
    padding: 14px;
  }

  .content-layout {
    grid-template-columns: 1fr;
  }

  .side-nav {
    position: static;
    order: -1;
  }
}

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

  .nav-wrap {
    min-height: 66px;
  }

  .menu-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    inset: 66px 0 auto;
    display: none;
    align-items: stretch;
    padding: 18px 14px 24px;
    border-bottom: 2px solid var(--ink);
    background: var(--paper);
    box-shadow: 0 14px 0 rgba(17, 19, 24, 0.08);
  }

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

  .site-nav > a:not(.btn) {
    padding: 13px 8px;
    border-bottom: 1px solid var(--line);
  }

  h1 {
    font-size: 46px;
  }

  h2 {
    font-size: 33px;
  }

  .hero-grid {
    min-height: auto;
    grid-template-columns: 1fr;
    padding-block: 48px 40px;
  }

  .hero-copy > p:not(.eyebrow),
  .page-hero p:not(.eyebrow) {
    font-size: 17px;
  }

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

  .burst {
    right: 4px;
  }

  .section {
    padding-block: 66px;
  }

  .section-heading {
    display: block;
  }

  .index-mark {
    display: block;
    margin-top: 10px;
  }

  .preview-grid,
  .quote-grid,
  .deep-grid,
  .feature-detail-grid,
  .related-links {
    grid-template-columns: 1fr;
  }

  .preview-frame {
    min-height: auto;
    padding: 24px;
  }

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

  .schedule-intro {
    position: static;
  }

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

  .stat {
    border-right: 0;
    border-bottom: 2px solid var(--ink);
  }

  .stat:last-child {
    border-bottom: 0;
  }

  .bottom-cta-inner {
    display: block;
    padding-block: 46px;
  }

  .bottom-cta .btn {
    margin-top: 24px;
  }

  .page-hero .container {
    padding-block: 50px;
  }

  .page-hero h1 {
    font-size: 43px;
  }

  .content-main h2 {
    font-size: 30px;
  }

  .step {
    grid-template-columns: 54px 1fr;
    gap: 16px;
    padding: 20px;
  }

  .step-number {
    width: 50px;
    height: 50px;
    font-size: 17px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    display: block;
  }
}

@media (max-width: 480px) {
  .brand {
    font-size: 19px;
  }

  .brand img {
    width: 38px;
    height: 38px;
  }

  h1 {
    font-size: 40px;
  }

  .hero-actions .btn,
  .bottom-cta .btn {
    width: 100%;
  }

  .hero-visual {
    min-height: 450px;
  }

  .phone-shot {
    width: 74%;
  }

  .burst {
    top: 20px;
    width: 96px;
    font-size: 14px;
  }

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

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

  .feature-number {
    margin-bottom: 24px;
  }

  .schedule-row {
    grid-template-columns: 58px 1fr;
  }

  .schedule-tag {
    display: none;
  }

  .deep-link {
    min-height: 280px;
  }

  .footer-bottom p + p {
    margin-top: 8px;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}