:root {
  --cream: #fffdd0;
  --petal: #fff0f5;
  --mocha: #7a5c51;
  --mocha-dark: #3f2b25;
  --peach: #ff8b94;
  --rose: #ff6b8b;
  --mint: #2f9b8f;
  --ink: #2c2421;
  --muted: #715f59;
  --line: rgba(122, 92, 81, .18);
  --paper: rgba(255, 255, 250, .82);
  --shadow: 0 18px 45px rgba(95, 61, 49, .16);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 4%, rgba(255, 139, 148, .16), transparent 28rem),
    linear-gradient(180deg, var(--petal) 0%, #fff8ee 42%, var(--cream) 100%);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

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

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

.icon-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.icon {
  flex: 0 0 auto;
  width: 1.05em;
  height: 1.05em;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

p {
  margin: 0;
}

h1,
h2,
h3 {
  margin: 0;
  color: var(--mocha-dark);
  line-height: 1.2;
  letter-spacing: 0;
}

h1 {
  max-width: 11em;
  font-size: clamp(1.95rem, 4.6vw, 3.9rem);
}

h2 {
  font-size: clamp(1.32rem, 2.35vw, 2rem);
}

h3 {
  font-size: 1.05rem;
}

.skip-link {
  position: fixed;
  top: .75rem;
  left: .75rem;
  z-index: 1000;
  padding: .65rem .9rem;
  color: #fff;
  background: var(--mocha-dark);
  border-radius: var(--radius);
  transform: translateY(-160%);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(122, 92, 81, .94);
  border-bottom: 1px solid rgba(255, 253, 208, .24);
  backdrop-filter: blur(16px);
}

.nav-wrap {
  width: min(1180px, calc(100% - 32px));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  min-width: 0;
  display: inline-flex;
  align-items: center;
  gap: .72rem;
  color: #fffdf4;
  font-weight: 800;
}

.brand img {
  width: 44px;
  height: 52px;
  object-fit: cover;
  border: 2px solid rgba(255, 240, 245, .76);
  border-radius: 6px;
}

.brand span {
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: .2rem;
  color: #fffdf4;
  font-size: .95rem;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .38rem;
  padding: calc(.58rem - 1px) calc(.78rem - 1px);
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: color .2s ease, border-color .2s ease, transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: #fff3a8;
  background: transparent;
  border-color: rgba(255, 243, 168, .88);
  outline: none;
}

.nav-cta {
  margin-left: .4rem;
  color: #fff !important;
  background: linear-gradient(135deg, var(--rose), var(--peach));
  box-shadow: 0 8px 22px rgba(255, 107, 139, .28);
}

.nav-links .nav-cta:hover,
.nav-links .nav-cta:focus-visible {
  color: #fff !important;
  background: linear-gradient(135deg, var(--rose), var(--peach));
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(255, 107, 139, .36);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  background: rgba(255, 253, 208, .14);
  border: 1px solid rgba(255, 253, 208, .28);
  border-radius: var(--radius);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: #fffdf4;
  border-radius: 999px;
  transition: transform .22s ease, opacity .18s ease;
  transform-origin: center;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.hero {
  position: relative;
  min-height: min(760px, calc(100svh - 116px));
  display: grid;
  align-items: end;
  overflow: hidden;
  background: var(--mocha-dark);
}

.hero-media,
.hero-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-media img {
  object-fit: cover;
  object-position: center;
  filter: saturate(1.08);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(63, 43, 37, .92), rgba(63, 43, 37, .62) 42%, rgba(63, 43, 37, .2)),
    linear-gradient(180deg, rgba(63, 43, 37, .1) 35%, rgba(63, 43, 37, .86) 100%);
}

.hero-content {
  position: relative;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: clamp(3.5rem, 9vw, 8rem) 0 3rem;
  color: #fffdf4;
}

.hero-content h1 {
  color: #fffdf4;
  text-shadow: 0 3px 22px rgba(0, 0, 0, .42);
}

.hero-copy {
  max-width: 650px;
  margin-top: 1.15rem;
  color: rgba(255, 253, 244, .92);
  font-size: clamp(1.02rem, 2vw, 1.25rem);
}

.eyebrow,
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  margin-bottom: .75rem;
  color: var(--mint);
  font-size: .82rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.eyebrow {
  color: #ffe2e7;
}

.eyebrow::before,
.section-kicker::before {
  content: "";
  width: 24px;
  height: 2px;
  background: currentColor;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  margin-top: 1.7rem;
}

.btn {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: .52rem;
  padding: .74rem 1.1rem;
  border-radius: var(--radius);
  font-weight: 800;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
  outline: none;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--rose), var(--peach));
  box-shadow: 0 14px 28px rgba(255, 107, 139, .3);
}

.btn-secondary {
  color: #fffdf4;
  border: 1px solid rgba(255, 253, 208, .38);
  background: rgba(255, 253, 208, .1);
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .8rem;
  max-width: 820px;
  margin: 2.2rem 0 0;
}

.hero-facts div {
  min-width: 0;
  padding: .85rem .9rem;
  background: rgba(255, 240, 245, .13);
  border: 1px solid rgba(255, 253, 208, .24);
  border-radius: var(--radius);
}

.hero-facts dt {
  color: #ffe2e7;
  font-size: .78rem;
  font-weight: 700;
}

.hero-facts dd {
  margin: .15rem 0 0;
  color: #fffdf4;
  font-weight: 800;
}

.quick-panel,
.section,
.site-footer {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.quick-panel {
  padding: 3.2rem 0 1rem;
}

.section {
  padding: clamp(3.2rem, 7vw, 6.4rem) 0;
  scroll-margin-top: 96px;
}

.section-head {
  max-width: 820px;
  margin-bottom: 2rem;
}

.section-head p:not(.section-kicker) {
  margin-top: .75rem;
  color: var(--muted);
}

.section-head.compact {
  margin-bottom: 1.35rem;
}

.quick-grid,
.feature-grid,
.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.quick-card,
.feature-grid article,
.steps article,
.faq-list details {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 10px 28px rgba(95, 61, 49, .08);
}

.quick-card {
  min-height: 210px;
  padding: 1.15rem;
}

.card-icon {
  display: inline-grid;
  width: 38px;
  height: 38px;
  place-items: center;
  margin-bottom: 1rem;
  color: #fff;
  background: var(--mocha);
  border-radius: 50%;
  font-weight: 800;
}

.quick-card p,
.feature-grid p,
.steps p,
.content-block p,
.tech-card p,
.faq-list p,
.site-footer p,
figcaption {
  color: var(--muted);
  font-size: .96rem;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(280px, .7fr);
  gap: clamp(1.4rem, 4vw, 3.2rem);
  align-items: center;
}

.section-copy p:not(.section-kicker) {
  margin-top: 1rem;
}

.feature-figure {
  margin: 0;
}

.feature-figure img {
  width: min(100%, 390px);
  margin-left: auto;
  aspect-ratio: 600 / 858;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

figcaption {
  margin-top: .75rem;
}

.content-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.content-block {
  overflow: hidden;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 10px 28px rgba(95, 61, 49, .08);
}

.content-block img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.content-block div {
  padding: 1.15rem;
}

.content-block p,
.feature-grid p,
.steps p {
  margin-top: .55rem;
}

.guide-section {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.steps {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.steps article {
  min-height: 224px;
  padding: 1.15rem;
}

.steps span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 32px;
  margin-bottom: .9rem;
  color: #fff;
  background: var(--rose);
  border-radius: var(--radius);
  font-weight: 900;
}

.gallery {
  position: relative;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) 48px;
  align-items: center;
  gap: .8rem;
}

.gallery-frame {
  margin: 0;
  overflow: hidden;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.gallery-frame img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  background: #eadbd3;
}

.gallery-frame figcaption {
  padding: .9rem 1rem 1rem;
}

.gallery-control {
  width: 48px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: var(--mocha);
  border: 0;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1.25rem;
  line-height: 1;
}

.gallery-control:hover,
.gallery-control:focus-visible {
  background: var(--mocha-dark);
  outline: none;
}

.feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-grid article {
  min-height: 188px;
  padding: 1.15rem;
  border-top: 4px solid var(--peach);
}

.tech-section {
  padding-top: 0;
}

.tech-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, .86fr);
  gap: 1.4rem;
  align-items: center;
  padding: 1.25rem;
  background: rgba(122, 92, 81, .1);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.tech-card p:not(.section-kicker) {
  margin-top: .8rem;
}

.tech-card img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  border-radius: var(--radius);
}

.updates-section {
  border-top: 1px solid var(--line);
}

.timeline {
  position: relative;
  display: grid;
  gap: .85rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.timeline li {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem;
  background: rgba(255, 255, 250, .72);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.timeline strong {
  color: var(--mocha-dark);
  font-weight: 900;
}

.timeline span {
  color: var(--muted);
}

.faq-section {
  padding-top: 0;
}

.faq-list {
  display: grid;
  gap: .8rem;
}

.faq-list details {
  padding: 0;
  overflow: hidden;
}

.faq-list summary {
  cursor: pointer;
  padding: 1rem 1.1rem;
  color: var(--mocha-dark);
  font-weight: 900;
}

.faq-list summary::marker {
  color: var(--rose);
}

.faq-list p {
  padding: 0 1.1rem 1.1rem;
}

.final-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.2rem;
  margin-bottom: 3.5rem;
  padding: 1.4rem;
  background: linear-gradient(135deg, rgba(122, 92, 81, .12), rgba(255, 139, 148, .22));
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.final-cta p:not(.section-kicker) {
  max-width: 760px;
  margin-top: .6rem;
  color: var(--muted);
}

.friend-links {
  width: 100%;
  margin: 0 auto 1.5rem;
  padding: 2.25rem 1rem 2.4rem;
  text-align: center;
  background: linear-gradient(180deg, rgba(255, 240, 245, .96), rgba(255, 253, 208, .78));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.friend-links-title {
  margin: 0;
  color: var(--mocha-dark);
  font-size: clamp(1.18rem, 2vw, 1.55rem);
  font-weight: 900;
  line-height: 1.2;
}

.friend-link-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .75rem;
  width: min(980px, calc(100% - 24px));
  margin: 1.2rem auto 0;
}

.friend-link-list a {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  padding: .58rem 1.2rem;
  color: var(--mocha-dark);
  background: rgba(255, 255, 255, .88);
  border: 1px solid rgba(122, 92, 81, .12);
  border-radius: 999px;
  box-shadow: 0 8px 22px rgba(95, 61, 49, .11);
  font-weight: 800;
  line-height: 1.35;
  transition: transform .2s ease, box-shadow .2s ease, color .2s ease;
}

.friend-link-list a:hover,
.friend-link-list a:focus-visible {
  color: var(--rose);
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(95, 61, 49, .16);
  outline: none;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 2rem 0 2.4rem;
  border-top: 1px solid var(--line);
}

.site-footer a {
  color: var(--mocha-dark);
  font-weight: 800;
}

.quick-card,
.content-block,
.feature-grid article,
.steps article,
.timeline li,
.faq-list details,
.tech-card,
.final-cta {
  transition: transform .24s ease, box-shadow .24s ease, border-color .24s ease, background .24s ease;
}

.quick-card:hover,
.quick-card:focus-within,
.content-block:hover,
.content-block:focus-within,
.feature-grid article:hover,
.feature-grid article:focus-within,
.steps article:hover,
.steps article:focus-within,
.faq-list details:hover,
.faq-list details:focus-within {
  transform: translateY(-5px);
  border-color: rgba(255, 107, 139, .38);
  box-shadow: 0 18px 38px rgba(95, 61, 49, .14);
}

.content-block img,
.gallery-frame img,
.tech-card img,
.feature-figure img {
  transition: transform .36s ease, filter .36s ease;
}

.content-block:hover img,
.gallery-frame:hover img,
.tech-card:hover img,
.feature-figure:hover img {
  transform: scale(1.025);
  filter: saturate(1.08) contrast(1.03);
}

.feature-figure,
.tech-card,
.gallery-frame {
  overflow: hidden;
}

.card-icon,
.steps span {
  transition: transform .22s ease, background .22s ease, box-shadow .22s ease;
}

.quick-card:hover .card-icon,
.steps article:hover span {
  transform: translateY(-2px) rotate(-4deg);
  background: var(--rose);
  box-shadow: 0 10px 22px rgba(255, 107, 139, .24);
}

.timeline li:hover,
.timeline li:focus-within {
  transform: translateX(6px);
  background: rgba(255, 255, 255, .9);
  border-color: rgba(47, 155, 143, .34);
  box-shadow: 0 14px 30px rgba(95, 61, 49, .12);
}

.timeline li:hover strong {
  color: var(--mint);
}

.faq-list summary {
  transition: color .2s ease, background .2s ease;
}

.faq-list details:hover summary,
.faq-list details:focus-within summary,
.faq-list details[open] summary {
  color: var(--rose);
  background: rgba(255, 139, 148, .08);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  box-shadow: 0 18px 36px rgba(255, 107, 139, .4);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  border-color: rgba(255, 243, 168, .72);
  background: rgba(255, 253, 208, .18);
  box-shadow: 0 14px 30px rgba(63, 43, 37, .2);
}

.hero-facts div {
  transition: transform .22s ease, border-color .22s ease, background .22s ease;
}

.hero-facts div:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 243, 168, .66);
  background: rgba(255, 240, 245, .2);
}

.gallery-control {
  transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
}

.gallery-control:hover,
.gallery-control:focus-visible {
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 12px 24px rgba(63, 43, 37, .22);
}

@media (max-width: 980px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    display: none;
    width: min(100%, 100vw);
    padding: .75rem 16px 1rem;
    background: rgba(122, 92, 81, .98);
    border-top: 1px solid rgba(255, 253, 208, .2);
  }

  .nav-links.is-open {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: .35rem;
  }

  .nav-links a {
    text-align: center;
    min-height: 42px;
  }

  .nav-cta {
    margin-left: 0;
  }

  .quick-grid,
  .feature-grid,
  .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .split,
  .tech-card {
    grid-template-columns: 1fr;
  }

  .feature-figure img {
    width: min(100%, 420px);
    margin: 0;
  }
}

@media (max-width: 720px) {
  html {
    scroll-padding-top: 108px;
  }

  body {
    line-height: 1.68;
  }

  .section {
    scroll-margin-top: 108px;
  }

  h1 {
    font-size: clamp(1.82rem, 8vw, 2.35rem);
  }

  h2 {
    font-size: clamp(1.22rem, 5.3vw, 1.55rem);
  }

  .nav-wrap,
  .quick-panel,
  .section,
  .site-footer {
    width: min(100% - 24px, 1180px);
  }

  .brand span {
    max-width: 180px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .hero {
    min-height: min(740px, calc(100svh - 132px));
  }

  .hero-media img {
    object-position: 58% center;
  }

  .hero-overlay {
    background:
      linear-gradient(180deg, rgba(63, 43, 37, .18), rgba(63, 43, 37, .88) 58%, rgba(63, 43, 37, .96)),
      linear-gradient(90deg, rgba(63, 43, 37, .72), rgba(63, 43, 37, .18));
  }

  .hero-content {
    padding-top: 2.4rem;
    padding-bottom: 1.35rem;
  }

  .hero-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: .6rem;
    margin-top: 1.15rem;
  }

  .quick-grid,
  .content-layout,
  .feature-grid,
  .steps {
    grid-template-columns: 1fr;
  }

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

  .gallery-control {
    display: none;
  }

  .gallery-frame img,
  .content-block img,
  .tech-card img {
    aspect-ratio: 16 / 9;
  }

  .timeline li {
    grid-template-columns: 1fr;
    gap: .35rem;
  }

  .final-cta,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .friend-links {
    padding: 2rem .75rem;
  }

  .friend-link-list {
    gap: .6rem;
  }

  .friend-link-list a {
    width: 100%;
    max-width: 330px;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
}