:root {
  --ink: #171419;
  --paper: #fffafc;
  --white: #ffffff;
  --pink: #ff5c8a;
  --pink-deep: #e83d70;
  --pink-soft: #ffdce7;
  --yellow: #ffd447;
  --mint: #46c7a8;
  --line: #e8dfe3;
  --muted: #6d646a;
  --shadow: 0 18px 50px rgba(38, 18, 29, 0.12);
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.75;
}

body.menu-open {
  overflow: hidden;
}

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

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

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 72px;
  background: rgba(255, 250, 252, 0.94);
  border-bottom: 1px solid rgba(23, 20, 25, 0.1);
  backdrop-filter: blur(16px);
}

.nav-shell {
  height: 72px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  font-size: 20px;
  font-weight: 900;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 10px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-left: auto;
  font-size: 15px;
  font-weight: 700;
}

.main-nav a:not(.download-btn) {
  position: relative;
  padding: 8px 0;
}

.main-nav a:not(.download-btn)::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 2px;
  left: 0;
  height: 3px;
  background: var(--pink);
  transform: scaleX(0);
  transition: transform 180ms ease;
}

.main-nav a:hover::after,
.main-nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

.download-btn,
.outline-btn {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 22px;
  border: 2px solid var(--ink);
  border-radius: 6px;
  font-weight: 900;
  line-height: 1;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.download-btn {
  color: var(--white);
  background: var(--pink);
  box-shadow: 5px 5px 0 var(--ink);
}

.outline-btn {
  background: var(--white);
}

.download-btn:hover,
.outline-btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 var(--ink);
}

.download-btn.small {
  min-height: 42px;
  padding-inline: 18px;
  font-size: 14px;
}

.arrow-icon {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  margin-left: auto;
  padding: 10px;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--ink);
}

.hero {
  position: relative;
  min-height: 520px;
  height: min(650px, calc(100svh - 116px));
  overflow: hidden;
  border-bottom: 2px solid var(--ink);
  background-color: var(--pink-soft);
  background-image: linear-gradient(rgba(23, 20, 25, 0.07) 1px, transparent 1px), linear-gradient(90deg, rgba(23, 20, 25, 0.07) 1px, transparent 1px);
  background-size: 34px 34px;
}

.hero::before {
  content: "";
  position: absolute;
  top: 8%;
  right: 5%;
  width: 180px;
  height: 180px;
  background: var(--yellow);
  clip-path: polygon(50% 0, 60% 35%, 85% 15%, 67% 42%, 100% 50%, 67% 58%, 85% 85%, 60% 65%, 50% 100%, 40% 65%, 15% 85%, 33% 58%, 0 50%, 33% 42%, 15% 15%, 40% 35%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  height: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(390px, 0.8fr);
  align-items: center;
  gap: 50px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  padding: 5px 10px;
  color: var(--white);
  background: var(--ink);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0;
}

.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--mint);
  border-radius: 50%;
}

.hero h1 {
  max-width: 650px;
  margin: 0;
  font-size: clamp(44px, 5vw, 72px);
  line-height: 1.05;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 610px;
  margin: 20px 0 24px;
  font-size: 18px;
  font-weight: 600;
}

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

.proof-row {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 22px;
  font-size: 13px;
  font-weight: 800;
}

.proof-row span::before {
  content: "✓";
  margin-right: 6px;
  color: var(--pink-deep);
}

.phone-stage {
  position: relative;
  height: 460px;
}

.phone-stage img {
  position: absolute;
  width: 224px;
  max-width: 400px;
  border: 5px solid var(--ink);
  border-radius: 20px;
  box-shadow: var(--shadow);
}

.phone-stage img:first-child {
  top: 62px;
  left: 0;
  transform: rotate(-7deg);
}

.phone-stage img:nth-child(2) {
  top: 2px;
  right: 0;
  transform: rotate(5deg);
}

.phone-label {
  position: absolute;
  right: 20%;
  bottom: 12px;
  padding: 8px 13px;
  background: var(--mint);
  border: 2px solid var(--ink);
  box-shadow: 4px 4px 0 var(--ink);
  font-size: 13px;
  font-weight: 900;
  transform: rotate(-3deg);
}

.ticker {
  overflow: hidden;
  color: var(--white);
  background: var(--ink);
  border-bottom: 2px solid var(--ink);
}

.ticker-track {
  display: flex;
  width: max-content;
  gap: 32px;
  padding: 11px 0;
  font-weight: 900;
  animation: ticker 22s linear infinite;
}

.ticker-track span::after {
  content: "✦";
  margin-left: 32px;
  color: var(--yellow);
}

@keyframes ticker {
  to {
    transform: translateX(-50%);
  }
}

.section {
  padding: 88px 0;
}

.section.alt {
  background: var(--white);
  border-block: 1px solid var(--line);
}

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

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 34px;
}

.section h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.15;
  letter-spacing: 0;
}

.section-mark {
  flex: 0 0 auto;
  color: var(--pink-deep);
  font-size: 13px;
  font-weight: 900;
}

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

.feature-item {
  min-height: 250px;
  padding: 28px;
  background: var(--white);
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
}

.feature-item:nth-child(2) {
  background: var(--pink-soft);
}

.feature-item:nth-child(3) {
  background: #d9f5ee;
}

.feature-item:nth-child(4) {
  background: #fff2b7;
}

.feature-number {
  display: block;
  margin-bottom: 34px;
  font-size: 13px;
  font-weight: 900;
}

.feature-item h3,
.route-step h3,
.link-panel h3,
.guide-step h2,
.function-block h2 {
  margin: 0 0 10px;
  line-height: 1.3;
  letter-spacing: 0;
}

.feature-item p,
.route-step p,
.link-panel p {
  margin: 0;
  color: #4f474c;
  font-size: 15px;
}

.showcase-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 70px;
  align-items: center;
}

.showcase-copy h2 {
  margin-bottom: 22px;
}

.showcase-copy ul {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.showcase-copy li {
  padding: 14px 0 14px 18px;
  border-left: 4px solid var(--pink);
  background: rgba(255, 255, 255, 0.06);
}

.preview-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 224px));
  justify-content: center;
  gap: 18px;
}

.preview-strip figure {
  margin: 0;
}

.preview-strip img {
  width: 100%;
  max-width: 400px;
  border: 4px solid var(--white);
  border-radius: 16px;
}

.preview-strip figure:nth-child(2) {
  margin-top: 44px;
}

.preview-strip figcaption {
  margin-top: 8px;
  color: #d8cfd4;
  font-size: 12px;
  text-align: center;
}

.route-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

.route-step {
  position: relative;
  padding: 26px 28px;
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
}

.route-step + .route-step {
  border-left: 2px dashed var(--ink);
}

.route-step strong {
  display: inline-grid;
  width: 38px;
  height: 38px;
  margin-bottom: 18px;
  place-items: center;
  color: var(--white);
  background: var(--pink);
  border: 2px solid var(--ink);
  border-radius: 50%;
}

.deep-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.link-panel {
  position: relative;
  min-height: 250px;
  padding: 34px;
  overflow: hidden;
  background: var(--white);
  border: 2px solid var(--ink);
}

.link-panel:last-child {
  background: var(--pink-soft);
}

.link-panel .panel-index {
  position: absolute;
  right: 18px;
  bottom: -34px;
  color: rgba(23, 20, 25, 0.08);
  font-size: 120px;
  font-weight: 900;
  line-height: 1;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 24px;
  color: var(--pink-deep);
  font-weight: 900;
}

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

.review {
  margin: 0;
  padding: 28px;
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 5px solid var(--pink);
}

.review:nth-child(2) {
  border-top-color: var(--mint);
}

.review:nth-child(3) {
  border-top-color: var(--yellow);
}

.review blockquote {
  margin: 0 0 18px;
  font-weight: 700;
}

.review figcaption {
  color: var(--muted);
  font-size: 13px;
}

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

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

.faq-list summary {
  position: relative;
  padding: 20px 52px 20px 0;
  cursor: pointer;
  list-style: none;
  font-weight: 900;
}

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

.faq-list summary::after {
  content: "+";
  position: absolute;
  top: 17px;
  right: 8px;
  width: 30px;
  height: 30px;
  color: var(--white);
  background: var(--ink);
  border-radius: 50%;
  font-size: 20px;
  line-height: 28px;
  text-align: center;
}

.faq-list details[open] summary::after {
  content: "−";
  background: var(--pink);
}

.faq-answer {
  max-width: 900px;
  padding: 0 52px 22px 0;
  color: #51494e;
}

.faq-answer p {
  margin: 0 0 10px;
}

.bottom-band {
  position: relative;
  padding: 62px 0;
  overflow: hidden;
  background: var(--yellow);
  border-block: 2px solid var(--ink);
}

.bottom-band .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.bottom-band h2 {
  margin: 0 0 8px;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.15;
  letter-spacing: 0;
}

.bottom-band p {
  margin: 0;
  font-weight: 700;
}

.bottom-copy-text {
  font-weight: 700;
}

.site-footer {
  padding: 44px 0 24px;
  color: #d9d0d5;
  background: var(--ink);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
}

.site-footer .brand {
  color: var(--white);
}

.footer-note {
  max-width: 620px;
  margin: 18px 0 0;
  font-size: 13px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-content: start;
  gap: 12px 24px;
  font-size: 14px;
  font-weight: 700;
}

.copyright {
  margin: 34px 0 0;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 12px;
}

.page-hero {
  padding: 74px 0 58px;
  background-color: var(--pink-soft);
  background-image: linear-gradient(rgba(23, 20, 25, 0.06) 1px, transparent 1px), linear-gradient(90deg, rgba(23, 20, 25, 0.06) 1px, transparent 1px);
  background-size: 30px 30px;
  border-bottom: 2px solid var(--ink);
}

.page-hero h1 {
  max-width: 850px;
  margin: 0 0 18px;
  font-size: clamp(40px, 6vw, 70px);
  line-height: 1.1;
  letter-spacing: 0;
}

.page-hero p {
  max-width: 760px;
  margin: 0;
  font-size: 17px;
  font-weight: 600;
}

.page-hero .hero-actions {
  margin-top: 26px;
}

.content-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 58px;
  align-items: start;
}

.article-flow {
  min-width: 0;
}

.guide-step,
.function-block {
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

.guide-step:first-child,
.function-block:first-child {
  padding-top: 0;
}

.guide-step h2,
.function-block h2 {
  font-size: 28px;
}

.guide-step p,
.function-block p {
  margin: 10px 0 0;
}

.step-kicker {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--pink-deep);
  font-size: 12px;
  font-weight: 900;
}

.check-list,
.plain-list {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li,
.plain-list li {
  padding: 12px 14px;
  background: var(--white);
  border-left: 4px solid var(--mint);
}

.plain-list li {
  border-left-color: var(--pink);
}

.side-nav {
  position: sticky;
  top: 98px;
  padding: 22px;
  background: var(--white);
  border: 2px solid var(--ink);
  box-shadow: 6px 6px 0 var(--pink-soft);
}

.side-nav strong {
  display: block;
  margin-bottom: 12px;
}

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

.side-nav .download-btn {
  margin-top: 18px;
  color: var(--white);
  border-bottom: 2px solid var(--ink);
}

.notice {
  margin: 24px 0;
  padding: 18px 20px;
  background: #fff2b7;
  border: 2px solid var(--ink);
}

.info-table {
  width: 100%;
  margin-top: 20px;
  border-collapse: collapse;
  background: var(--white);
}

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

.info-table th {
  width: 30%;
  background: var(--pink-soft);
}

.function-lead {
  display: grid;
  grid-template-columns: 1fr 224px;
  gap: 34px;
  align-items: center;
  margin-bottom: 28px;
  padding: 28px;
  background: var(--white);
  border: 2px solid var(--ink);
}

.function-lead img {
  width: 224px;
  max-width: 400px;
  border: 3px solid var(--ink);
  border-radius: 14px;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.pill {
  padding: 5px 10px;
  background: #d9f5ee;
  border: 1px solid var(--ink);
  font-size: 12px;
  font-weight: 800;
}

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

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

.related-row a:hover {
  background: var(--pink-soft);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media (max-width: 920px) {
  .menu-toggle {
    display: block;
  }

  .main-nav {
    position: fixed;
    top: 72px;
    right: 0;
    left: 0;
    display: none;
    padding: 22px 20px 28px;
    background: var(--paper);
    border-bottom: 2px solid var(--ink);
  }

  .main-nav.open {
    display: grid;
  }

  .main-nav .download-btn {
    width: 100%;
  }

  .hero-inner {
    grid-template-columns: 1fr 330px;
    gap: 20px;
  }

  .phone-stage {
    height: 420px;
  }

  .phone-stage img {
    width: 190px;
  }

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

  .route-step:nth-child(3) {
    border-left: 0;
  }

  .showcase-grid {
    gap: 34px;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(calc(100% - 28px), var(--max));
  }

  .site-header,
  .nav-shell {
    height: 64px;
  }

  .main-nav {
    top: 64px;
  }

  .brand {
    font-size: 18px;
  }

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

  .hero {
    min-height: 470px;
    height: min(610px, calc(100svh - 100px));
  }

  .hero-inner {
    grid-template-columns: 1fr;
    align-content: center;
    padding-block: 34px;
  }

  .hero h1 {
    max-width: 360px;
    font-size: clamp(42px, 13vw, 62px);
  }

  .hero-copy {
    max-width: 500px;
    margin: 14px 0 18px;
    font-size: 15px;
  }

  .proof-row {
    gap: 8px 14px;
    margin-top: 16px;
  }

  .phone-stage {
    position: absolute;
    right: -82px;
    bottom: -118px;
    width: 260px;
    height: 360px;
    opacity: 0.22;
    pointer-events: none;
  }

  .phone-stage img {
    width: 170px;
  }

  .phone-label {
    display: none;
  }

  .section {
    padding: 62px 0;
  }

  .section-head {
    align-items: start;
    margin-bottom: 24px;
  }

  .section-mark {
    margin-top: 9px;
  }

  .feature-grid,
  .route-grid,
  .showcase-grid,
  .deep-links,
  .review-grid,
  .footer-grid,
  .content-layout,
  .related-row,
  .function-lead {
    grid-template-columns: 1fr;
  }

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

  .feature-number {
    margin-bottom: 18px;
  }

  .route-step + .route-step,
  .route-step:nth-child(3) {
    border-left: 0;
    border-top: 0;
  }

  .preview-strip {
    grid-template-columns: repeat(2, minmax(0, 190px));
  }

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

  .bottom-band .container {
    align-items: flex-start;
    flex-direction: column;
  }

  .side-nav {
    position: static;
  }

  .page-hero {
    padding: 54px 0 44px;
  }

  .function-lead img {
    margin-inline: auto;
  }
}

@media (max-width: 440px) {
  .hero-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .download-btn,
  .outline-btn {
    min-width: 0;
    padding-inline: 13px;
    font-size: 14px;
  }

  .proof-row span:last-child {
    display: none;
  }

  .preview-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .info-table,
  .info-table tbody,
  .info-table tr,
  .info-table th,
  .info-table td {
    display: block;
    width: 100%;
  }
}