:root {
  --ink: #18151d;
  --muted: #6b6571;
  --paper: #fffdf9;
  --paper-warm: #f6f1e8;
  --night: #241733;
  --night-soft: #352247;
  --gold: #d4a63a;
  --gold-dark: #9d7418;
  --coral: #c6535d;
  --teal: #2c7d78;
  --line: #ded7ca;
  --white: #ffffff;
  --shadow: 0 18px 42px rgba(34, 23, 48, 0.14);
  --radius: 8px;
  --container: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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;
}

button {
  font: inherit;
}

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

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 1000;
  padding: 10px 14px;
  color: var(--white);
  background: var(--night);
  transform: translateY(-140%);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(157, 116, 24, 0.24);
  background: rgba(255, 253, 249, 0.96);
  backdrop-filter: blur(12px);
}

.nav-shell {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 11px;
  color: var(--night);
  font-size: 20px;
  font-weight: 800;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 8px;
}

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

.site-nav a {
  padding: 8px 13px;
  border-bottom: 2px solid transparent;
  color: #3f3846;
  font-size: 15px;
  font-weight: 700;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  border-bottom-color: var(--gold);
  color: var(--night);
}

.btn {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 800;
  line-height: 1.2;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

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

.btn-primary {
  color: var(--white);
  background: var(--coral);
  box-shadow: 0 10px 22px rgba(198, 83, 93, 0.22);
}

.btn-primary:hover {
  background: #ad3d48;
}

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

.btn-outline {
  border-color: rgba(255, 255, 255, 0.45);
  color: var(--white);
  background: transparent;
}

.nav-download {
  min-height: 40px;
  padding: 9px 16px;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 10px;
  border: 0;
  border-radius: 6px;
  color: var(--night);
  background: var(--paper-warm);
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 21px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
}

.hero {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background: var(--night);
}

.hero::before {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 32px 32px;
  content: "";
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  min-height: 610px;
  grid-template-columns: 1.08fr 0.92fr;
  align-items: center;
  gap: 64px;
  padding: 64px 0 52px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  color: #efd074;
  font-size: 14px;
  font-weight: 800;
}

.eyebrow::before {
  width: 28px;
  height: 2px;
  background: var(--gold);
  content: "";
}

h1,
h2,
h3 {
  margin-top: 0;
  color: var(--night);
  line-height: 1.25;
  letter-spacing: 0;
}

.hero h1 {
  max-width: 650px;
  margin-bottom: 20px;
  color: var(--white);
  font-size: clamp(42px, 6vw, 72px);
  font-family: Georgia, "Microsoft YaHei", serif;
}

.hero-lead {
  max-width: 620px;
  margin: 0 0 26px;
  color: #e5dfeb;
  font-size: 18px;
}

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

.hero-note {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 24px;
  margin: 22px 0 0;
  padding: 0;
  color: #cfc5d7;
  font-size: 14px;
  list-style: none;
}

.hero-note li::before {
  margin-right: 7px;
  color: var(--gold);
  content: "◆";
  font-size: 9px;
}

.hero-visual {
  position: relative;
  display: flex;
  min-height: 480px;
  align-items: center;
  justify-content: center;
}



.phone-frame {
  position: relative;
  z-index: 2;
  width: min(300px, 76vw);
  padding: 11px;
  border: 1px solid #6d5b79;
  border-radius: 32px;
  background: #100b16;
  box-shadow: 0 28px 65px rgba(0, 0, 0, 0.44);
  transform: rotate(-3deg);
}

.phone-frame img {
  width: 100%;
  max-width: 400px;
  border-radius: 23px;
}

.stat-strip {
  border-bottom: 1px solid var(--line);
  background: var(--paper-warm);
}

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

.stat {
  padding: 24px 20px;
  border-right: 1px solid var(--line);
  text-align: center;
}

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

.stat strong {
  display: block;
  color: var(--night);
  font-family: Georgia, "Microsoft YaHei", serif;
  font-size: 25px;
  line-height: 1.25;
}

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

.section {
  padding: 88px 0;
}

.section-compact {
  padding: 62px 0;
}

.section-warm {
  background: var(--paper-warm);
}

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

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 34px;
}

.section-heading h2 {
  max-width: 680px;
  margin-bottom: 0;
  font-size: clamp(30px, 4vw, 46px);
  font-family: Georgia, "Microsoft YaHei", serif;
}

.section-heading .heading-mark {
  flex: 0 0 auto;
  color: var(--gold-dark);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.feature-card {
  min-height: 235px;
  padding: 26px 24px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--gold);
  border-radius: var(--radius);
  background: var(--white);
}

.feature-card:nth-child(2) {
  border-top-color: var(--coral);
}

.feature-card:nth-child(3) {
  border-top-color: var(--teal);
}

.feature-card:nth-child(4) {
  border-top-color: var(--night-soft);
}

.feature-number {
  display: block;
  margin-bottom: 26px;
  color: var(--gold-dark);
  font-family: Georgia, serif;
  font-size: 14px;
  font-weight: 700;
}

.feature-card h3 {
  margin-bottom: 10px;
  font-size: 20px;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.showcase-layout {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 58px;
  align-items: center;
}

.showcase-copy h2 {
  margin-bottom: 22px;
  font-size: clamp(32px, 4vw, 48px);
  font-family: Georgia, "Microsoft YaHei", serif;
}

.showcase-copy > p {
  color: var(--muted);
}

.showcase-copy .section-copy p,
.cta-inner .section-copy p {
  margin: 0;
}

.showcase-copy .section-copy p {
  color: var(--muted);
}

.screen-tabs {
  display: grid;
  gap: 8px;
  margin-top: 26px;
}

.screen-tab {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--ink);
  background: transparent;
  cursor: pointer;
  text-align: left;
  font-weight: 800;
}

.screen-tab::after {
  color: var(--gold-dark);
  content: "→";
  font-size: 20px;
}

.screen-tab.active,
.screen-tab:hover {
  border-color: var(--line);
  background: var(--white);
}

.screen-stage {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  align-items: end;
}

.screen-shot {
  width: 100%;
  max-width: 400px;
  border: 8px solid #17121c;
  border-radius: 24px;
  box-shadow: var(--shadow);
  opacity: 0.72;
  transform: translateY(18px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.screen-shot.active {
  opacity: 1;
  transform: translateY(-10px);
}

.journey-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.journey-card {
  display: grid;
  min-height: 270px;
  grid-template-columns: 1fr auto;
  gap: 22px;
  align-items: end;
  padding: 34px;
  border-radius: var(--radius);
  color: var(--white);
  background: var(--night-soft);
}

.journey-card:nth-child(2) {
  color: var(--ink);
  background: #ead6b1;
}

.journey-card h3 {
  margin-bottom: 12px;
  color: inherit;
  font-size: 27px;
}

.journey-card p {
  margin: 0;
  color: inherit;
  opacity: 0.82;
}

.journey-card .arrow-link {
  display: inline-grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-size: 23px;
}

.reviews-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr 0.9fr;
  gap: 18px;
}

.review-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}

.review-card:first-child {
  color: var(--white);
  background: var(--night);
}

.review-stars {
  margin-bottom: 18px;
  color: var(--gold);
  letter-spacing: 2px;
}

.review-card blockquote {
  margin: 0 0 22px;
  font-size: 16px;
}

.review-card cite {
  color: var(--muted);
  font-size: 13px;
  font-style: normal;
}

.review-card:first-child cite {
  color: #cfc5d7;
}

.faq-list {
  display: grid;
  gap: 10px;
}

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

.faq-question {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 19px 4px;
  border: 0;
  color: var(--night);
  background: transparent;
  cursor: pointer;
  text-align: left;
  font-weight: 800;
}

.faq-question::after {
  flex: 0 0 auto;
  color: var(--gold-dark);
  content: "+";
  font-size: 24px;
}

.faq-question[aria-expanded="true"]::after {
  content: "−";
}

.faq-answer {
  display: none;
  max-width: 850px;
  padding: 0 4px 20px;
  color: var(--muted);
}

.faq-answer p {
  margin: 0;
}

.faq-answer.open {
  display: block;
}

.cta-band {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background: var(--coral);
}

.cta-inner {
  display: flex;
  min-height: 250px;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 44px 0;
}

.cta-inner h2 {
  max-width: 650px;
  margin-bottom: 10px;
  color: var(--white);
  font-size: clamp(30px, 4vw, 46px);
  font-family: Georgia, "Microsoft YaHei", serif;
}

.cta-inner p {
  margin: 0;
  color: #fff2f2;
}

.site-footer {
  padding: 48px 0 26px;
  color: #cfc7d4;
  background: #151018;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr;
  gap: 46px;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
  font-size: 20px;
  font-weight: 800;
}

.footer-brand img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
}

.site-footer h3 {
  margin-bottom: 14px;
  color: var(--white);
  font-size: 16px;
}

.site-footer p {
  margin: 14px 0 0;
  font-size: 13px;
}

.footer-links {
  display: grid;
  gap: 9px;
  font-size: 14px;
}

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

.footer-bottom {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid #312936;
  font-size: 12px;
}

.page-hero {
  position: relative;
  overflow: hidden;
  padding: 82px 0 64px;
  color: var(--white);
  background: var(--night);
}

.page-hero::after {
  position: absolute;
  top: 0;
  right: 5%;
  width: 210px;
  height: 100%;
  border-right: 1px solid rgba(212, 166, 58, 0.55);
  border-left: 1px solid rgba(212, 166, 58, 0.2);
  content: "";
  transform: skewX(-12deg);
}

.page-hero .container {
  position: relative;
  z-index: 2;
}

.breadcrumbs {
  margin-bottom: 24px;
  color: #cfc5d7;
  font-size: 13px;
}

.breadcrumbs a:hover {
  color: var(--white);
}

.page-hero h1 {
  max-width: 780px;
  margin-bottom: 18px;
  color: var(--white);
  font-size: clamp(38px, 5vw, 62px);
  font-family: Georgia, "Microsoft YaHei", serif;
}

.page-hero p {
  max-width: 760px;
  margin: 0;
  color: #ded5e4;
  font-size: 17px;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 54px;
  align-items: start;
}

.article-content h2 {
  margin: 56px 0 22px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 30px;
  font-family: Georgia, "Microsoft YaHei", serif;
}

.article-content h2:first-child {
  margin-top: 0;
}

.article-content h3 {
  margin: 30px 0 12px;
  font-size: 21px;
}

.article-content p {
  margin: 0 0 18px;
  color: #4f4855;
}

.article-content a:not(.btn) {
  color: var(--coral);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.steps {
  display: grid;
  gap: 28px;
}

.step {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 18px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.step-index {
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  border-radius: 50%;
  color: var(--white);
  background: var(--night);
  font-family: Georgia, serif;
  font-size: 20px;
}

.step h3 {
  margin-top: 3px;
}

.note-box {
  margin: 26px 0;
  padding: 22px 24px;
  border-left: 4px solid var(--gold);
  background: var(--paper-warm);
}

.note-box strong {
  display: block;
  margin-bottom: 6px;
  color: var(--night);
}

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

.guide-shot {
  width: 100%;
  max-width: 400px;
  margin: 24px auto;
  border: 8px solid var(--night);
  border-radius: 22px;
  box-shadow: var(--shadow);
}

.article-aside {
  position: sticky;
  top: 96px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}

.article-aside h2 {
  margin-bottom: 14px;
  font-size: 17px;
}

.toc {
  display: grid;
  gap: 9px;
  margin-bottom: 22px;
  color: var(--muted);
  font-size: 14px;
}

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

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

.detail-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}

.detail-card h3 {
  margin-top: 0;
}

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

.related-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.related-link {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  font-weight: 800;
}

.related-link:hover {
  border-color: var(--gold);
}

@media (max-width: 980px) {
  .menu-toggle {
    position: absolute;
    top: 15px;
    right: 0;
    z-index: 210;
    display: block !important;
    flex: 0 0 42px;
    color: var(--night);
    font-size: 24px;
    line-height: 1;
  }

  .site-nav {
    position: fixed;
    inset: 73px 0 auto;
    display: none;
    padding: 20px;
    border-bottom: 1px solid var(--line);
    background: var(--paper);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
  }

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

  .site-nav a {
    padding: 12px;
  }

  .site-nav .nav-download {
    margin-top: 6px;
  }

  .hero-grid {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .hero-visual {
    min-height: 430px;
  }

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

  .showcase-layout,
  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-aside {
    position: static;
  }

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

  .review-card:first-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 680px) {
  .container {
    width: min(calc(100% - 28px), var(--container));
  }

  .nav-shell {
    min-height: 64px;
  }

  .site-nav {
    top: 65px;
  }

  .brand {
    font-size: 18px;
  }

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

  .hero-grid {
    height: calc(100svh - 88px);
    min-height: 580px;
    max-height: 760px;
    align-items: start;
    gap: 24px;
    overflow: hidden;
    padding-top: 38px;
    padding-bottom: 0;
  }

  .hero-visual {
    min-height: 300px;
    align-items: flex-start;
  }

  .phone-frame {
    width: min(260px, 72vw);
  }

  .hero h1 {
    font-size: 42px;
  }

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

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

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

  .stat:nth-child(2) {
    border-right: 0;
  }

  .stat:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .section {
    padding: 62px 0;
  }

  .section-heading {
    align-items: start;
    flex-direction: column;
    gap: 8px;
  }

  .feature-grid,
  .journey-grid,
  .reviews-grid,
  .feature-detail-grid,
  .related-links,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .review-card:first-child {
    grid-column: auto;
  }

  .screen-stage {
    grid-template-columns: repeat(3, 76%);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding: 18px 4px 24px;
  }

  .screen-shot {
    scroll-snap-align: center;
  }

  .cta-inner {
    align-items: stretch;
    flex-direction: column;
  }

  .cta-inner .btn {
    width: 100%;
  }

  .page-hero {
    padding: 58px 0 48px;
  }

  .page-hero h1 {
    font-size: 38px;
  }

  .step {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 13px;
  }

  .step-index {
    width: 42px;
    height: 42px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}