:root {
  --bg: #f4f6f9;
  --surface: #ffffff;
  --surface-2: #eef3f8;
  --text: #1a1a1a;
  --muted: #5c6575;
  --line: #d8dfea;
  --pink: #ff007f;
  --pink-soft: #ffe0ef;
  --cyan: #00e5ff;
  --cyan-soft: #d9fbff;
  --shadow: 0 18px 40px rgba(26, 26, 26, 0.08);
  --shadow-soft: 0 10px 24px rgba(26, 26, 26, 0.06);
  --radius: 8px;
  --container: 1200px;
  --header-container: 1326px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font: 16px/1.75 "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

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

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

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

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

.container {
  width: min(calc(100% - 40px), var(--container));
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: 12px;
  z-index: 100;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  transform: translateY(-160%);
  transition: transform 0.18s ease;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(216, 223, 234, 0.8);
  background: rgba(244, 246, 249, 0.88);
  backdrop-filter: blur(16px);
}

body.is-scrolled .site-header {
  background: rgba(244, 246, 249, 0.96);
  box-shadow: 0 10px 28px rgba(26, 26, 26, 0.08);
}

main section[id] {
  scroll-margin-top: 96px;
}

.header-inner {
  width: min(calc(100% - 40px), var(--header-container));
  max-width: var(--header-container);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.brand img,
.footer-brand img {
  width: 56px;
  height: 56px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-copy strong,
.footer-brand strong {
  font-size: 0.98rem;
  line-height: 1.2;
}

.brand-copy em,
.footer-brand p {
  font-style: normal;
  color: var(--muted);
  font-size: 0.86rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 1 auto;
  margin-left: auto;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.site-nav::-webkit-scrollbar {
  display: none;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  flex: 0 0 auto;
  padding: 9px 12px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--muted);
  background: transparent;
  transition: transform 0.18s ease, color 0.18s ease, background-color 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--pink);
  border-color: rgba(0, 229, 255, 0.72);
  background: rgba(255, 255, 255, 0.28);
  box-shadow: 0 0 0 3px rgba(255, 0, 127, 0.08), inset 0 0 0 1px rgba(255, 0, 127, 0.28);
  transform: translateY(-1px);
}

.menu-toggle {
  position: relative;
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  min-height: 44px;
  margin-left: auto;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  box-shadow: var(--shadow-soft);
  cursor: pointer;
}

.menu-toggle-line {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 22px;
  height: 2px;
  border-radius: 999px;
  background: var(--text);
  transform: translate(-50%, -50%);
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.menu-toggle-line:nth-child(1) {
  transform: translate(-50%, calc(-50% - 7px));
}

.menu-toggle-line:nth-child(3) {
  transform: translate(-50%, calc(-50% + 7px));
}

.menu-toggle[aria-expanded="true"] .menu-toggle-line:nth-child(1) {
  transform: translate(-50%, -50%) rotate(45deg);
}

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

.menu-toggle[aria-expanded="true"] .menu-toggle-line:nth-child(3) {
  transform: translate(-50%, -50%) rotate(-45deg);
}

.nav-cta,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease, border-color 0.18s ease;
  white-space: nowrap;
}

.nav-cta {
  flex: 0 0 auto;
  margin-left: 18px;
  border-color: rgba(255, 0, 127, 0.24);
  background: linear-gradient(135deg, #ff2f93, #ff007f);
  color: #fff;
  box-shadow: 0 14px 30px rgba(255, 0, 127, 0.24);
}

.nav-cta:hover,
.btn:hover {
  transform: translateY(-1px);
}

.hero {
  position: relative;
  min-height: auto;
  overflow: hidden;
  background: #11151d;
}

.hero-art {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 0;
  width: 100%;
  height: auto;
  object-fit: contain;
  object-position: center top;
  background: #11151d;
}

.hero-tint {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(90deg, rgba(13, 16, 23, 0.88) 0%, rgba(13, 16, 23, 0.72) 44%, rgba(13, 16, 23, 0.28) 100%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  min-height: 0;
  display: flex;
  align-items: center;
  padding-block: 36px 30px;
}

.hero-copy {
  max-width: 720px;
  color: #fff;
}

.hero-brandline {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
  padding: 6px 12px 6px 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.hero-brandline img {
  width: 42px;
  height: 42px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.24);
}

.hero-brandline span {
  color: rgba(255, 255, 255, 0.92);
  font-size: 0.9rem;
  letter-spacing: 0;
}

.hero h1 {
  margin: 0;
  color: var(--pink);
  background: linear-gradient(135deg, #ffffff 0%, #ff5aa8 42%, var(--cyan) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 16px 24px rgba(0, 0, 0, 0.34));
  font-size: clamp(2rem, 3.6vw, 3.8rem);
  line-height: 1.06;
}

.hero-lead {
  margin: 12px 0 0;
  max-width: 60ch;
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.04rem;
}

.hero-meta,
.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.hero-meta span,
.hero-points li {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(6px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

.btn-primary {
  background: linear-gradient(135deg, #ff2f93, #ff007f);
  color: #fff;
  box-shadow: 0 14px 30px rgba(255, 0, 127, 0.24);
}

.btn-secondary {
  border-color: rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
}

.btn-secondary:hover {
  border-color: rgba(255, 255, 255, 0.34);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.18);
}

.band {
  padding: 74px 0;
  border-top: 1px solid var(--line);
  background: var(--bg);
}

.band-muted {
  background: linear-gradient(180deg, #eef3f8 0%, #f4f6f9 100%);
}

.section-head {
  margin-bottom: 28px;
}

.section-head h2 {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  color: var(--pink);
  font-size: clamp(1.45rem, 2.1vw, 2.15rem);
  line-height: 1.15;
}

.section-head h2::after {
  content: "";
  width: 38px;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--pink), var(--cyan));
}

.section-head p {
  margin: 12px 0 0;
  max-width: 74ch;
  color: var(--muted);
}

.two-col {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: 28px;
  align-items: start;
}

.two-col-reverse {
  grid-template-columns: minmax(280px, 0.92fr) minmax(0, 1.08fr);
}

.copy-stack {
  display: grid;
  gap: 18px;
}

.copy-stack h3 {
  margin: 0;
  font-size: 1.25rem;
  line-height: 1.3;
}

.copy-stack p {
  margin: 0;
  color: var(--muted);
}

.bullet-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 18px;
  color: var(--text);
}

.bullet-list li {
  padding-left: 6px;
}

.media-panel {
  margin: 0;
  overflow: visible;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.media-panel:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 229, 255, 0.48);
  box-shadow: 0 24px 52px rgba(26, 26, 26, 0.12), 0 0 0 3px rgba(255, 0, 127, 0.06);
}

.media-panel picture,
.media-panel img {
  width: 100%;
}

.media-panel picture {
  display: block;
  background: var(--surface);
}

.media-panel img {
  height: auto;
  object-fit: contain;
  object-position: center center;
  background: var(--surface);
}

.media-panel figcaption {
  padding: 12px 14px 14px;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.65;
}

.compact figcaption {
  padding-top: 10px;
}

.mini-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.mini-card,
.feature-card,
.update-card,
.faq-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
}

.mini-card:hover,
.feature-card:hover,
.update-card:hover,
.faq-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 0, 127, 0.36);
  background-color: #fff;
  box-shadow: 0 18px 34px rgba(26, 26, 26, 0.1), 0 0 0 3px rgba(0, 229, 255, 0.08);
}

.mini-card {
  padding: 16px 16px 15px;
}

.mini-card h4 {
  margin: 0 0 8px;
  font-size: 1rem;
  line-height: 1.25;
}

.mini-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.stack-gallery {
  display: grid;
  gap: 18px;
}

.guide-list {
  margin: 0;
  padding-left: 22px;
  display: grid;
  gap: 14px;
}

.guide-list li {
  color: var(--text);
}

.guide-list strong {
  color: var(--pink);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.feature-card {
  padding: 16px;
  border-top: 3px solid transparent;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(255, 255, 255, 0.98)) padding-box,
    linear-gradient(135deg, rgba(255, 0, 127, 0.42), rgba(0, 229, 255, 0.38)) border-box;
}

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

.feature-card:nth-child(2n + 1) {
  border-top-color: var(--pink);
}

.feature-card h3 {
  margin: 0 0 10px;
  font-size: 1.02rem;
  line-height: 1.35;
}

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

.update-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.update-card {
  padding: 15px 15px 16px;
}

.version {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  margin-bottom: 10px;
  padding: 0 12px;
  border-radius: 999px;
  background: var(--pink-soft);
  color: var(--pink);
  font-size: 0.86rem;
  font-weight: 700;
}

.update-card p {
  margin: 0;
  color: var(--muted);
}

.faq-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.faq-card {
  overflow: hidden;
  padding: 0;
}

.faq-card h3 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.35;
}

.faq-question {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  min-height: 54px;
  padding: 14px 52px 14px 18px;
  border: 0;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-weight: 800;
  text-align: left;
  cursor: pointer;
}

.faq-question::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 3px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--pink), var(--cyan));
  opacity: 0;
  transition: opacity 0.18s ease;
}

.faq-question::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  display: inline-grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border: 1px solid rgba(255, 0, 127, 0.24);
  border-radius: 999px;
  background: var(--pink-soft);
  color: var(--pink);
  font-size: 1.1rem;
  line-height: 1;
  transform: translateY(-50%);
  transition: transform 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.faq-question:hover,
.faq-question:focus-visible,
.faq-question[aria-expanded="true"] {
  color: var(--pink);
  outline: none;
}

.faq-question:hover::before,
.faq-question:focus-visible::before,
.faq-question[aria-expanded="true"]::before {
  opacity: 1;
}

.faq-question[aria-expanded="true"]::after {
  content: "−";
  border-color: rgba(0, 229, 255, 0.52);
  background: var(--cyan-soft);
  transform: translateY(-50%) rotate(180deg);
}

.faq-answer {
  padding: 0 18px 16px 18px;
}

.faq-answer p {
  margin: 0;
  padding: 14px 16px;
  border-left: 3px solid rgba(0, 229, 255, 0.45);
  border-radius: var(--radius);
  background: rgba(244, 246, 249, 0.72);
  color: var(--muted);
}

.friend-links {
  padding: 44px 0 42px;
  color: #fff;
  background:
    radial-gradient(circle at 78% 18%, rgba(255, 0, 127, 0.52), transparent 34%),
    linear-gradient(110deg, #1a2030 0%, #35213f 42%, #ff007f 140%);
}

.friend-links-inner {
  text-align: center;
}

.friend-kicker {
  margin: 0 0 8px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.friend-links h2 {
  margin: 0;
  color: #fff;
  font-size: clamp(1.55rem, 2.2vw, 2.3rem);
  line-height: 1.15;
}

.friend-link-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 24px;
}

.friend-link-list a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 46px;
  max-width: 100%;
  padding: 0 20px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.13);
  color: #fff;
  font-weight: 800;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18), 0 16px 30px rgba(0, 0, 0, 0.12);
  backdrop-filter: blur(10px);
  transition: transform 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.friend-link-list a:hover {
  transform: translateY(-1px);
  border-color: rgba(0, 229, 255, 0.55);
  background: rgba(255, 255, 255, 0.2);
}

.friend-dot {
  width: 10px;
  height: 10px;
  flex: 0 0 auto;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--pink), var(--cyan));
  box-shadow: 0 0 0 5px rgba(255, 0, 127, 0.14);
}

.site-footer {
  padding: 28px 0 36px;
  border-top: 1px solid var(--line);
  background: var(--surface);
}

.footer-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 16px;
  align-items: center;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.footer-brand p {
  margin: 4px 0 0;
}

.back-top {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  justify-self: center;
  color: var(--pink);
  font-weight: 700;
  transition: transform 0.18s ease, color 0.18s ease, filter 0.18s ease;
}

.back-top:hover {
  color: #ff2f93;
  filter: drop-shadow(0 8px 16px rgba(255, 0, 127, 0.2));
  transform: translateY(-2px);
}

.copyright {
  margin: 0;
  color: var(--muted);
  justify-self: end;
}

.floating-detail {
  position: fixed;
  right: max(22px, env(safe-area-inset-right));
  bottom: max(22px, env(safe-area-inset-bottom));
  z-index: 60;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  background: linear-gradient(135deg, #ff2f93, #ff007f);
  color: #fff;
  font-weight: 800;
  box-shadow: 0 18px 38px rgba(255, 0, 127, 0.28), 0 0 0 4px rgba(0, 229, 255, 0.08);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.floating-detail:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 229, 255, 0.58);
  box-shadow: 0 22px 46px rgba(255, 0, 127, 0.34), 0 0 0 5px rgba(0, 229, 255, 0.1);
}

.reveal,
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 1024px) {
  main section[id] {
    scroll-margin-top: 170px;
  }

  .header-inner {
    flex-wrap: wrap;
    padding-block: 12px;
  }

  .site-nav {
    order: 3;
    width: 100%;
    margin-left: 0;
  }

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

  .two-col,
  .two-col-reverse {
    grid-template-columns: 1fr;
  }

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

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

  .footer-inner {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .back-top,
  .copyright {
    justify-self: start;
  }
}

@media (max-width: 720px) {
  main section[id] {
    scroll-margin-top: 92px;
  }

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

  .header-inner {
    row-gap: 10px;
    min-height: 68px;
    padding-block: 10px;
  }

  .brand {
    min-width: 0;
  }

  .brand-copy {
    min-width: 0;
  }

  .brand-copy strong,
  .brand-copy em {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow-soft);
    overflow: visible;
  }

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

  .site-nav a {
    justify-content: center;
    width: 100%;
    min-height: 42px;
    background: var(--surface-2);
  }

  .nav-cta {
    display: none;
    order: 4;
    width: 100%;
    min-height: 46px;
    margin-left: 0;
  }

  .site-header.is-menu-open .nav-cta {
    display: inline-flex;
  }

  .hero {
    min-height: auto;
  }

  .hero-inner {
    min-height: auto;
    padding-block: 24px 22px;
  }

  .hero h1 {
    font-size: 1.85rem;
  }

  .section-head h2 {
    font-size: 1.45rem;
  }

  .hero-lead {
    font-size: 0.98rem;
  }

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

  .friend-links {
    padding: 34px 0 32px;
  }

  .friend-link-list {
    align-items: stretch;
    gap: 10px;
  }

  .friend-link-list a {
    width: 100%;
    justify-content: center;
    min-height: 44px;
    padding: 0 14px;
    white-space: normal;
    text-align: center;
    line-height: 1.35;
  }

  .floating-detail {
    right: 14px;
    bottom: max(14px, env(safe-area-inset-bottom));
    left: 14px;
    min-height: 46px;
  }

  .band {
    padding: 58px 0;
  }
}

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

  .reveal,
  .reveal.is-visible,
  .nav-cta,
  .btn,
  .site-nav a,
  .media-panel,
  .mini-card,
  .feature-card,
  .update-card,
  .faq-card,
  .faq-question,
  .friend-link-list a,
  .back-top,
  .floating-detail {
    transition: none;
  }
}