:root {
  --ink: #20172b;
  --muted: #6e6476;
  --paper: #fffdfd;
  --rose: #d43c79;
  --rose-dark: #9e245d;
  --violet: #3b2361;
  --violet-deep: #1e1432;
  --ice: #90ddf4;
  --gold: #f2c66f;
  --line: rgba(38, 23, 50, 0.14);
  --shell: 76rem;
  --header-h: 4.75rem;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 5.5rem; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", "Noto Sans SC", "Noto Sans CJK SC", sans-serif;
  font-size: 1rem;
  line-height: 1.65;
  letter-spacing: 0;
}
body.nav-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, summary { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--ice); outline-offset: 3px; }

.shell { width: min(100% - 2rem, var(--shell)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 100; top: 0.5rem; left: 0.5rem; padding: 0.65rem 1rem; background: #fff; color: #111; transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  z-index: 30;
  inset: 0 0 auto;
  min-height: var(--header-h);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(24, 15, 40, 0.92);
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  color: #fff;
  backdrop-filter: blur(12px);
}
.brand { display: flex; align-items: center; gap: 0.7rem; min-height: 3rem; }
.brand > span:last-child { display: grid; line-height: 1.2; }
.brand strong { font-family: inherit; font-size: 1rem; font-weight: 800; letter-spacing: 0.02em; }
.brand small { margin-top: 0.2rem; color: #d8c8e5; font-size: 0.72rem; }
.brand-gem {
  width: 2.2rem; height: 2.55rem; display: block;
  background: var(--ice);
  clip-path: polygon(50% 0, 95% 28%, 78% 78%, 50% 100%, 22% 78%, 5% 28%);
  box-shadow: inset 0 0 0 0.45rem #8b4fb0;
}
.nav-toggle { width: 3rem; height: 3rem; border: 0; background: transparent; display: grid; place-content: center; gap: 0.32rem; cursor: pointer; }
.nav-toggle span { display: block; width: 1.45rem; height: 2px; background: #fff; transition: transform 0.2s, opacity 0.2s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(0.44rem) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-0.44rem) rotate(-45deg); }
.site-nav {
  position: fixed; inset: var(--header-h) 0 0;
  padding: 2rem 1.25rem;
  display: grid; align-content: start; gap: 0.25rem;
  background: #211435;
  transform: translateX(100%);
  transition: transform 0.25s ease;
}
.site-nav.open { transform: translateX(0); }
.site-nav a { min-height: 3.25rem; display: flex; align-items: center; padding: 0.6rem 0; border-bottom: 1px solid rgba(255,255,255,0.12); color: #eee5f4; }
.site-nav .nav-download { color: #24162f; background: var(--gold); justify-content: center; margin-top: 1rem; border: 0; clip-path: polygon(0.8rem 0, calc(100% - 0.8rem) 0, 100% 50%, calc(100% - 0.8rem) 100%, 0.8rem 100%, 0 50%); }

.hero {
  min-height: min(51rem, 88svh);
  position: relative;
  overflow: hidden;
  display: grid;
  align-items: center;
  color: #fff;
  background-color: #21455d;
  background-image: url("assets/web/official-04.webp");
  background-size: cover;
  background-position: 46% center;
}
.hero-shade { position: absolute; inset: 0; background: rgba(21, 12, 35, 0.48); box-shadow: inset 0 -14rem 10rem rgba(14, 9, 27, 0.72), inset 26rem 0 18rem rgba(15, 8, 28, 0.56); }
.hero-content { position: relative; z-index: 2; padding-block: 8rem 7.5rem; }
.archive-index, .eyebrow { margin: 0 0 0.9rem; color: var(--rose); font-size: 0.78rem; font-weight: 800; text-transform: uppercase; }
.archive-index { color: #fff; }
.archive-index span { display: inline-block; margin-right: 0.55rem; padding: 0.25rem 0.55rem; color: #2b193b; background: var(--gold); }
.hero h1 {
  display: inline-block;
  margin: 0;
  max-width: none;
  white-space: nowrap;
  font-family: "STKaiti", "KaiTi", "楷体_GB2312", "FangSong", serif;
  font-size: 2.85rem;
  font-style: italic;
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: 0.04em;
  -webkit-text-stroke: 0.35px rgba(255, 255, 255, 0.35);
  text-shadow: 0 3px 18px rgba(0,0,0,0.42), 0 0 1px rgba(255,214,236,0.8);
  transform: skewX(-3deg);
  transform-origin: left center;
}
.hero-subtitle { margin: 0.7rem 0 0; max-width: 18ch; color: #ffd6e5; font-family: inherit; font-size: 1.45rem; font-weight: 800; line-height: 1.35; }
.hero-copy { max-width: 34rem; margin: 1rem 0 1.45rem; color: #f7f1fa; font-size: 0.98rem; }
.hero-actions { display: flex; flex-direction: column; align-items: flex-start; gap: 1.1rem; }
.crystal-download {
  position: relative;
  min-height: 5.25rem;
  width: min(100%, 24rem);
  padding: 0.85rem 3.5rem 0.85rem 4.5rem;
  display: flex; align-items: center;
  color: #fff;
  background: #b32668;
  border: 2px solid #f8d88e;
  clip-path: polygon(0.9rem 0, 72% 0, 78% 13%, calc(100% - 1rem) 13%, 100% 50%, calc(100% - 1rem) 87%, 78% 87%, 72% 100%, 0.9rem 100%, 0 50%);
  box-shadow: inset 0 0 0 4px rgba(255,255,255,0.17);
  cursor: pointer;
  transition: transform 0.2s, filter 0.2s;
}
.crystal-download::before, .crystal-download::after { content: ""; position: absolute; pointer-events: none; }
.crystal-download::before { inset: 0; background: linear-gradient(120deg, transparent 0 34%, rgba(255,255,255,0.25) 35% 45%, transparent 46% 100%); }
.crystal-download::after { width: 3.4rem; height: 100%; right: 1.2rem; top: 0; border-left: 1px solid rgba(255,255,255,0.36); transform: skewX(-18deg); }
.crystal-download:hover { transform: translateY(-3px); filter: brightness(1.1); }
.crystal-icon { position: absolute; left: 1.1rem; display: grid; place-items: center; width: 2.65rem; height: 3.05rem; color: #28133d; background: var(--ice); font-size: 1.5rem; font-weight: 900; clip-path: polygon(50% 0, 95% 28%, 78% 78%, 50% 100%, 22% 78%, 5% 28%); }
.crystal-copy { display: grid; position: relative; z-index: 2; line-height: 1.25; }
.crystal-copy strong { font-size: 1rem; }
.crystal-copy small { margin-top: 0.3rem; color: #ffe7f0; font-size: 0.74rem; }
.crystal-crown { position: absolute; z-index: 3; top: -0.75rem; left: 1.4rem; display: flex; align-items: end; gap: 0.08rem; }
.crystal-crown i { width: 0.42rem; height: 0.65rem; display: block; background: var(--gold); clip-path: polygon(50% 0,100% 100%,0 100%); }
.crystal-crown i:nth-child(2) { height: 0.95rem; }
.crystal-heel { position: absolute; z-index: 3; right: 1.1rem; bottom: 0.65rem; width: 2.4rem; height: 1.5rem; border-bottom: 0.28rem solid var(--gold); border-right: 0.28rem solid var(--gold); transform: skewX(-24deg); }
.text-link { min-height: 2.75rem; display: inline-flex; align-items: center; gap: 0.5rem; border-bottom: 1px solid rgba(255,255,255,0.65); font-weight: 700; }
.source-note { max-width: 34rem; margin: 1rem 0 0; color: #ddd3e4; font-size: 0.78rem; }
.scroll-cue { position: absolute; z-index: 2; bottom: 1.15rem; left: 50%; transform: translateX(-50%); display: grid; place-items: center; color: #fff; font-size: 0.72rem; }
.scroll-cue i { width: 1px; height: 1.6rem; margin-top: 0.35rem; background: #fff; }

.band, .band-dark, .band-soft, .crystal-stage { padding-block: 4.75rem; }
.band-dark { color: #fff; background: var(--violet-deep); }
.band-soft { background: #f4f7f7; border-block: 1px solid #dfe7e8; }
.section-heading { max-width: 48rem; }
.section-heading h2, .crystal-copy-block h2, .guide-copy h2 { margin: 0; font-family: inherit; font-size: 2rem; font-weight: 800; line-height: 1.25; letter-spacing: 0.01em; }
.section-heading > p:last-child, .crystal-copy-block > p, .guide-copy > p { color: var(--muted); }
.section-heading.light > p:last-child, .guide-copy > p { color: #cfc3d7; }
.overview { border-bottom: 1px solid var(--line); }
.overview-grid { display: grid; gap: 1.75rem; }
.overview-copy { max-width: 42rem; margin: 0; color: var(--muted); }
.archive-stats { margin: 0; display: grid; grid-template-columns: 1fr; border-top: 1px solid var(--line); }
.archive-stats div { padding: 1rem 0; display: flex; justify-content: space-between; gap: 1rem; border-bottom: 1px solid var(--line); }
.archive-stats dt { font-family: Georgia, serif; color: var(--violet); font-weight: 700; }
.archive-stats dd { margin: 0; color: var(--muted); font-size: 0.85rem; }

.lookbook-layout { margin-top: 2rem; display: grid; gap: 1rem; }
.feature-shot { position: relative; margin: 0; min-height: 18rem; overflow: hidden; border: 1px solid rgba(255,255,255,0.22); }
.feature-shot img { width: 100%; height: 100%; object-fit: cover; }
.feature-shot figcaption { position: absolute; inset: auto 0 0; padding: 4rem 1.1rem 1rem; display: grid; color: #fff; background: linear-gradient(transparent, rgba(20,10,32,0.9)); }
.feature-shot figcaption span { color: var(--gold); font-size: 0.72rem; font-weight: 800; }
.feature-shot figcaption strong { font-family: inherit; font-size: 1.5rem; font-weight: 800; }
.feature-shot figcaption small { color: #ddd1e4; }
.fabric-notes { display: grid; gap: 0; border-block: 1px solid rgba(255,255,255,0.18); }
.fabric-notes p { margin: 0; padding: 1rem 0; display: grid; grid-template-columns: 2.5rem 4rem 1fr; align-items: baseline; border-bottom: 1px solid rgba(255,255,255,0.12); color: #cfc4d8; }
.fabric-notes p:last-child { border-bottom: 0; }
.fabric-notes span { color: var(--ice); font-family: Georgia, serif; }
.fabric-notes strong { color: #fff; }

.split-heading { display: grid; gap: 1rem; max-width: none; }
.split-heading > p { max-width: 34rem; margin: 0; color: var(--muted); }
.story-list { margin-top: 2rem; display: grid; gap: 3rem; }
.story-row { display: grid; gap: 1.25rem; align-items: center; }
.story-row img { width: 100%; aspect-ratio: 16/9; object-fit: cover; border: 1px solid var(--line); }
.story-row h3 { margin: 0.25rem 0 0.5rem; font-family: inherit; font-size: 1.6rem; font-weight: 800; }
.story-row p { margin: 0; color: var(--muted); }
.story-no { color: var(--rose); font-family: Georgia, serif; font-size: 0.78rem; font-weight: 800; }

.crystal-stage { color: #fff; background: #173b53; overflow: hidden; }
.crystal-layout { display: grid; gap: 2.5rem; align-items: center; }
.crystal-copy-block > p { color: #c4dce7; }
.mode-switch { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.5rem; }
.mode-switch button { min-height: 2.75rem; padding: 0.6rem 0.9rem; color: #dcecf2; background: transparent; border: 1px solid rgba(255,255,255,0.3); cursor: pointer; }
.mode-switch button.active { color: #132d3e; background: var(--ice); border-color: var(--ice); }
.phone-stage { position: relative; width: min(100%, 22rem); margin-inline: auto; padding-top: 2.25rem; }
.phone-label { position: absolute; z-index: 2; top: 0; right: 0; color: var(--gold); font-family: Georgia, serif; font-size: 0.75rem; }
.phone-frame { position: relative; aspect-ratio: 9/16; overflow: hidden; border: 0.55rem solid #ede7f0; box-shadow: 1.1rem 1.1rem 0 #b82c69; clip-path: polygon(8% 0, 92% 0, 100% 5%, 100% 95%, 92% 100%, 8% 100%, 0 95%, 0 5%); }
.phone-frame img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transform: translateX(10%); transition: opacity 0.25s, transform 0.25s; }
.phone-frame img.active { opacity: 1; transform: translateX(0); }

.gallery-grid { margin-top: 2rem; display: grid; grid-template-columns: 1fr; gap: 0.75rem; }
.gallery-item { position: relative; min-height: 14rem; padding: 0; overflow: hidden; border: 0; background: #21172b; cursor: zoom-in; }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.35s; }
.gallery-item:hover img { transform: scale(1.025); }
.gallery-item span { position: absolute; left: 0.75rem; bottom: 0.75rem; padding: 0.4rem 0.7rem; color: #fff; background: rgba(27,17,40,0.86); font-size: 0.78rem; }

.index-list { margin-top: 2rem; display: grid; grid-template-columns: 1fr; border-top: 1px solid #cfdadd; }
.index-list article { position: relative; padding: 1.1rem 0 1.1rem 3rem; border-bottom: 1px solid #cfdadd; }
.index-list article > span { position: absolute; left: 0; top: 1.15rem; color: var(--rose); font-family: Georgia, serif; font-size: 0.8rem; }
.index-list h3 { margin: 0; font-size: 1rem; }
.index-list p { margin: 0.35rem 0 0; color: var(--muted); font-size: 0.88rem; }

.guide-layout { display: grid; gap: 3rem; }
.package-facts { margin: 1.5rem 0; border-top: 1px solid rgba(255,255,255,0.2); }
.package-facts p { margin: 0; padding: 0.75rem 0; display: grid; grid-template-columns: 6rem 1fr; border-bottom: 1px solid rgba(255,255,255,0.14); }
.package-facts span { color: #ad9db9; }
.package-facts strong { color: #fff; overflow-wrap: anywhere; }
.crystal-download.compact { min-height: 4.75rem; }
.install-steps { margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,0.2); }
.install-steps li { padding: 1.3rem 0; display: grid; grid-template-columns: 3rem 1fr; gap: 0.75rem; border-bottom: 1px solid rgba(255,255,255,0.16); }
.install-steps > li > span { color: var(--gold); font-family: Georgia, serif; }
.install-steps h3 { margin: 0; font-family: inherit; font-size: 1.25rem; font-weight: 800; }
.install-steps p { margin: 0.35rem 0 0; color: #cfc3d7; }

.faq-layout { display: grid; gap: 2rem; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { min-height: 4rem; padding: 1rem 2.5rem 1rem 0; display: flex; align-items: center; position: relative; font-weight: 700; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 0; color: var(--rose); font-size: 1.5rem; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { margin: -0.25rem 0 1.25rem; color: var(--muted); }

.site-footer { padding: 2.25rem 0 6.5rem; color: #c7bbcF; background: #120c1d; }
.footer-grid { display: grid; gap: 1rem; }
.footer-grid strong { color: #fff; }
.footer-grid p { margin: 0.25rem 0 0; font-size: 0.82rem; }
.footer-grid > a { min-height: 2.75rem; display: inline-flex; align-items: center; color: var(--gold); }
.mobile-download { position: fixed; z-index: 25; inset: auto 0 0; min-height: 4.25rem; padding: 0.55rem 1rem; display: flex; justify-content: space-between; align-items: center; gap: 0.75rem; color: #fff; background: rgba(25,15,39,0.96); border-top: 1px solid rgba(255,255,255,0.2); }
.mobile-download > div { display: grid; line-height: 1.25; }
.mobile-download small { color: #c8bbd2; }
.mobile-download a { min-width: 7.5rem; min-height: 3rem; display: flex; justify-content: center; align-items: center; gap: 0.4rem; color: #24152f; background: var(--gold); font-weight: 800; clip-path: polygon(0.7rem 0, calc(100% - 0.7rem) 0, 100% 50%, calc(100% - 0.7rem) 100%, 0.7rem 100%, 0 50%); }

.lightbox { width: min(94vw, 74rem); max-height: 92vh; padding: 0; border: 1px solid rgba(255,255,255,0.3); background: #150e21; overflow: visible; }
.lightbox::backdrop { background: rgba(7,5,11,0.88); }
.lightbox img { width: 100%; max-height: 88vh; object-fit: contain; }
.lightbox-close { position: absolute; z-index: 2; top: -1rem; right: -0.5rem; width: 3rem; height: 3rem; border: 1px solid rgba(255,255,255,0.4); color: #fff; background: #9e245d; font-size: 1.7rem; cursor: pointer; }

@media (min-width: 48rem) {
  .shell { width: min(100% - 3rem, var(--shell)); }
  .hero { background-position: center; }
  .hero-content { padding-block: 9rem 7rem; }
  .hero h1 { font-size: 4rem; }
  .hero-subtitle { font-size: 1.8rem; max-width: none; }
  .hero-actions { flex-direction: row; align-items: center; gap: 1.5rem; }
  .overview-grid { grid-template-columns: 1.15fr 0.85fr; }
  .overview-copy { grid-column: 1; }
  .archive-stats { grid-column: 2; grid-row: 1 / span 2; }
  .lookbook-layout { grid-template-columns: 1.35fr 0.65fr; }
  .shot-wide { grid-row: span 2; }
  .feature-shot { min-height: 22rem; }
  .shot-wide { min-height: 30rem; }
  .fabric-notes { grid-column: 1 / -1; }
  .story-row { grid-template-columns: 1.45fr 0.55fr; gap: 2rem; }
  .story-row.reverse { grid-template-columns: 0.55fr 1.45fr; }
  .story-row.reverse img { grid-column: 2; grid-row: 1; }
  .story-row.reverse div { grid-column: 1; grid-row: 1; }
  .crystal-layout { grid-template-columns: 1fr 0.65fr; gap: 4rem; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 16rem; }
  .gallery-item { min-height: 0; }
  .gallery-item.wide { grid-column: span 2; }
  .index-list { grid-template-columns: repeat(2, 1fr); column-gap: 2rem; }
  .guide-layout { grid-template-columns: 1.1fr 0.9fr; }
  .faq-layout { grid-template-columns: 0.7fr 1.3fr; }
  .footer-grid { grid-template-columns: 1fr 1.5fr auto; align-items: start; }
}

@media (max-width: 26rem) {
  .hero h1 { font-size: 2.55rem; }
}

@media (min-width: 64rem) {
  .site-header { padding-inline: max(1.5rem, calc((100vw - var(--shell)) / 2)); }
  .nav-toggle { display: none; }
  .site-nav { position: static; padding: 0; display: flex; align-items: center; gap: 1.65rem; background: transparent; transform: none; }
  .site-nav a { min-height: 3rem; padding: 0; border: 0; color: #e9e1ef; font-size: 0.9rem; }
  .site-nav a:hover { color: var(--gold); }
  .site-nav .nav-download { min-width: 7.5rem; margin: 0; padding-inline: 1.25rem; color: #27172f; background: var(--gold); }
  .hero-shade { background: rgba(18, 10, 30, 0.22); box-shadow: inset 0 -15rem 10rem rgba(13,8,24,0.62), inset 36rem 0 20rem rgba(14,8,25,0.72); }
  .hero h1 { font-size: 4.65rem; }
  .band, .band-dark, .band-soft, .crystal-stage { padding-block: 6.5rem; }
  .section-heading h2, .crystal-copy-block h2, .guide-copy h2 { font-size: 2.55rem; }
  .split-heading { grid-template-columns: 1fr 0.72fr; align-items: end; }
  .lookbook-layout { grid-template-columns: 1.45fr 0.55fr 0.5fr; align-items: stretch; }
  .shot-wide { grid-row: auto; min-height: 32rem; }
  .shot-tall { min-height: 32rem; }
  .shot-tall img { object-position: 61% center; }
  .fabric-notes { grid-column: auto; align-content: center; border-block: 0; border-left: 1px solid rgba(255,255,255,0.2); padding-left: 1.5rem; }
  .fabric-notes p { grid-template-columns: 2.2rem 1fr; }
  .fabric-notes p strong { grid-column: 2; }
  .fabric-notes p { color: #9e91a8; }
  .gallery-grid { grid-template-columns: 1.1fr 0.9fr 0.9fr; grid-auto-rows: 18rem; }
  .gallery-item.wide { grid-column: auto; }
  .gallery-item:first-child, .gallery-item:last-child { grid-row: span 2; }
  .index-list { grid-template-columns: repeat(3, 1fr); }
  .mobile-download { display: none; }
  .site-footer { padding-bottom: 2.25rem; }
}

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