:root {
  --paper: #f4f6f6;
  --paper-white: #fcfdfb;
  --paper-shadow: #d9dddf;
  --ink: #101317;
  --muted: #5f666c;
  --blue: #2855a5;
  --blue-dark: #17386f;
  --red: #c83d3a;
  --rule: #aeb5ba;
  --serif: "Noto Serif CJK SC", "Source Han Serif SC", "Songti SC", SimSun, serif;
  --sans: "Noto Sans CJK SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  --utility: "Arial Narrow", "Roboto Condensed", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    repeating-linear-gradient(0deg, rgba(16,19,23,.018) 0, rgba(16,19,23,.018) 1px, transparent 1px, transparent 4px),
    var(--paper-shadow);
  font-family: var(--sans);
  line-height: 1.72;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--red); outline-offset: 4px; }

.folio-header {
  position: relative;
  z-index: 20;
  background: var(--paper-white);
  border-bottom: 1px solid var(--ink);
}
.folio-nav {
  width: min(1380px, calc(100% - 48px));
  min-height: 88px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto minmax(140px, 1fr) auto auto;
  align-items: center;
  gap: clamp(20px, 3vw, 52px);
}
.masthead { display: flex; align-items: center; gap: 11px; font-family: var(--serif); font-size: 29px; font-weight: 900; letter-spacing: -.08em; }
.masthead img { display: block; width: 34px; height: 34px; object-fit: contain; }
.issue-line { display: flex; align-items: center; gap: 11px; color: var(--muted); font: 700 11px/1 var(--utility); letter-spacing: .15em; text-transform: uppercase; }
.issue-line b { flex: 1; height: 1px; background: var(--rule); }
.nav-links { display: flex; align-items: center; gap: 25px; font-size: 14px; font-weight: 700; }
.nav-links a { position: relative; padding: 31px 0 27px; }
.nav-links a[aria-current="page"]::after { content: ""; position: absolute; right: 0; bottom: 20px; left: 0; height: 3px; background: var(--red); }
.download-link, .button-ink, .button-blue, .button-paper {
  min-width: 116px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  word-break: keep-all;
  writing-mode: horizontal-tb;
  font-weight: 800;
}
.download-link { padding: 12px 20px; color: white; background: var(--ink); font-size: 14px; }
.download-link:hover, .button-ink:hover { background: var(--blue); }

.cover-spread { padding: 36px 24px 70px; background: linear-gradient(90deg, #e2e5e6 0, var(--paper) 45%, #e6e9ea 100%); }
.spread-pages {
  position: relative;
  width: min(1380px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: .92fr 1.08fr;
  align-items: center;
  background: var(--paper-white);
  box-shadow: 0 22px 60px rgba(29, 35, 39, .18), 0 2px 0 white inset;
}
.spread-pages::after { content: ""; position: absolute; top: 0; bottom: 0; left: 45.99%; width: 16px; pointer-events: none; background: linear-gradient(90deg, rgba(16,19,23,.12), rgba(255,255,255,.72) 47%, rgba(16,19,23,.08)); }
.cover-copy { min-width: 0; padding: clamp(40px, 5.5vw, 88px) clamp(30px, 5vw, 76px) 34px; align-self: stretch; display: flex; flex-direction: column; border-right: 1px solid #c6cbce; }
.edition-row { display: flex; justify-content: space-between; padding-bottom: 13px; border-bottom: 4px solid var(--ink); font: 800 11px/1 var(--utility); letter-spacing: .14em; }
.cover-index { margin: 18px 0 40px; color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .12em; }
.cover-copy h1 { margin: 0; font-family: var(--serif); font-size: clamp(66px, 8vw, 128px); font-weight: 900; line-height: .86; letter-spacing: -.1em; }
.cover-copy h1 span, .cover-copy h1 em { display: block; }
.cover-copy h1 em { margin-top: .14em; margin-left: .38em; color: var(--blue); font-style: normal; }
.cover-deck { width: min(470px, 90%); margin: 38px 0 0; padding-top: 18px; border-top: 1px solid var(--ink); font-family: var(--serif); font-size: clamp(18px, 1.6vw, 23px); font-weight: 700; line-height: 1.7; }
.cover-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 25px; margin-top: 30px; }
.button-ink { padding: 14px 24px; color: white; background: var(--ink); }
.text-arrow { display: inline-flex; align-items: center; gap: 10px; padding-bottom: 4px; border-bottom: 1px solid currentColor; font-size: 14px; font-weight: 800; }
.text-arrow span { color: var(--red); font-size: 20px; }
.platform-note { margin: 28px 0 0; color: var(--muted); font: 700 11px/1.5 var(--utility); letter-spacing: .07em; }
.editor-note { margin-top: auto; padding-top: 28px; display: grid; grid-template-columns: auto 1fr; gap: 15px; align-items: start; font-size: 12px; color: var(--muted); }
.editor-note b { padding: 2px 7px; color: white; background: var(--red); font-size: 10px; }
.feature-photo { min-width: 0; padding: 28px 28px 18px; align-self: center; background: #eef1f1; }
.photo-rubric, .page-folio { display: flex; justify-content: space-between; font: 800 10px/1 var(--utility); letter-spacing: .13em; }
.photo-rubric { margin-bottom: 13px; padding-bottom: 12px; border-bottom: 1px solid var(--ink); }
.hero-media { position: relative; }
.hero-media figcaption { display: grid; grid-template-columns: minmax(120px, .65fr) 1fr; gap: 18px; margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--rule); font-size: 11px; line-height: 1.5; }
.hero-media figcaption b { font-family: var(--serif); font-size: 16px; }
.hero-media figcaption span { color: var(--muted); }
.page-folio { margin-top: 24px; padding-top: 10px; border-top: 1px solid var(--ink); }

.contents-strip {
  width: min(1380px, calc(100% - 48px));
  margin: 0 auto 90px;
  display: grid;
  grid-template-columns: .7fr repeat(3, 1fr);
  background: var(--paper-white);
  border-top: 6px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}
.contents-title, .contents-strip > a { min-height: 145px; padding: 25px; border-right: 1px solid var(--rule); }
.contents-strip > :last-child { border-right: 0; }
.contents-title small, .contents-strip a span { color: var(--red); font: 800 10px/1 var(--utility); letter-spacing: .14em; }
.contents-title h2 { margin: 8px 0 0; font-family: var(--serif); font-size: 28px; }
.contents-strip a { position: relative; display: flex; flex-direction: column; }
.contents-strip a b { margin-top: 12px; max-width: 200px; font-family: var(--serif); font-size: 17px; line-height: 1.45; }
.contents-strip a i { position: absolute; right: 18px; bottom: 13px; color: var(--blue); font: 800 28px/1 var(--utility); font-style: normal; }
.contents-strip a:hover { background: #e9eef5; }

.editorial-feature {
  width: min(1260px, calc(100% - 48px));
  margin: 0 auto 120px;
  display: grid;
  grid-template-columns: 130px minmax(0, 1.15fr) minmax(220px, .55fr);
  gap: 38px;
  align-items: start;
}
.section-marker { position: sticky; top: 24px; display: flex; flex-direction: column; gap: 12px; padding-top: 14px; border-top: 5px solid var(--blue); }
.section-marker span, .section-marker i { font: 800 10px/1 var(--utility); letter-spacing: .14em; font-style: normal; }
.section-marker b { font-family: var(--serif); font-size: 20px; }
.section-marker i { color: var(--muted); }
.feature-lead { padding-left: clamp(0px, 3vw, 40px); border-left: 1px solid var(--rule); }
.drop-intro { margin: 0 0 28px; color: var(--blue); font-size: 15px; font-weight: 800; }
.drop-intro::first-letter { float: left; margin: 4px 9px 0 0; color: var(--red); font-family: var(--serif); font-size: 58px; line-height: .7; }
.feature-lead h2, .device-story h2, .notes-heading h2, .faq-cover h2, .back-cover h2 { font-family: var(--serif); font-weight: 900; letter-spacing: -.055em; }
.feature-lead h2 { margin: 0; font-size: clamp(40px, 5vw, 72px); line-height: 1.16; }
.feature-lead > p:last-child { max-width: 680px; margin: 28px 0 0; font-size: 17px; }
.margin-quote { padding-top: 70px; }
.margin-quote span { display: inline-block; padding: 3px 7px; color: white; background: var(--red); font-size: 10px; font-weight: 800; }
.margin-quote blockquote { margin: 15px 0 0; padding: 16px 0 0; border-top: 1px solid var(--ink); font-family: var(--serif); font-size: 22px; font-weight: 800; line-height: 1.55; }
.feature-columns { grid-column: 2 / 4; margin-top: 16px; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
.feature-columns article { min-height: 230px; padding: 24px 22px; border-right: 1px solid var(--rule); }
.feature-columns article:last-child { border-right: 0; }
.article-no { color: var(--red); font: 900 30px/1 var(--utility); }
.feature-columns h3 { margin: 42px 0 10px; font-family: var(--serif); font-size: 20px; }
.feature-columns p { margin: 0; color: var(--muted); font-size: 13px; }

.device-spread {
  width: min(1380px, calc(100% - 48px));
  margin: 0 auto 120px;
  display: grid;
  grid-template-columns: 1.13fr .87fr;
  align-items: center;
  background: var(--paper-white);
  box-shadow: 0 18px 45px rgba(26,34,39,.13);
}
.device-photo { min-width: 0; }
.device-photo figcaption { padding: 10px 18px; border-top: 1px solid var(--ink); color: var(--muted); font-size: 11px; }
.device-story { position: relative; align-self: stretch; padding: clamp(45px, 6vw, 90px); padding-left: clamp(65px, 7vw, 110px); background: var(--blue); color: white; }
.spine-label { position: absolute; top: 0; bottom: 0; left: 0; width: 44px; display: flex; align-items: center; justify-content: center; background: var(--blue-dark); border-right: 1px solid rgba(255,255,255,.3); font: 800 10px/1 var(--utility); letter-spacing: .16em; writing-mode: vertical-rl; }
.eyebrow { margin: 0 0 25px; color: #bed1f2; font: 800 11px/1 var(--utility); letter-spacing: .15em; }
.device-story h2 { margin: 0; font-size: clamp(39px, 4.6vw, 68px); line-height: 1.18; }
.large-copy { margin: 26px 0; font-family: var(--serif); font-size: 17px; font-weight: 700; }
.device-story dl { margin: 0 0 30px; }
.device-story dl div { padding: 13px 0; display: grid; grid-template-columns: 90px 1fr; gap: 16px; border-top: 1px solid rgba(255,255,255,.32); }
.device-story dt { font-weight: 800; }
.device-story dd { margin: 0; color: #dce6f7; font-size: 12px; }
.button-blue { padding: 13px 24px; color: var(--blue); background: white; }
.button-blue:hover { background: #e3ebf7; }
.page-folio.dark { margin-top: 38px; border-color: rgba(255,255,255,.55); }

.field-notes { width: min(1260px, calc(100% - 48px)); margin: 0 auto 120px; }
.notes-heading { display: grid; grid-template-columns: 180px 1fr .6fr; gap: 34px; align-items: end; padding-bottom: 30px; border-bottom: 5px solid var(--ink); }
.notes-heading > div { display: flex; flex-direction: column; gap: 10px; }
.notes-heading span { color: var(--red); font: 800 10px/1 var(--utility); letter-spacing: .15em; }
.notes-heading b { font-family: var(--serif); font-size: 22px; }
.notes-heading h2 { margin: 0; font-size: clamp(39px, 4.6vw, 64px); line-height: 1.18; }
.notes-heading p { margin: 0; color: var(--muted); font-size: 14px; }
.notes-grid { display: grid; grid-template-columns: 1.1fr .9fr 1fr; }
.notes-grid article { min-height: 290px; padding: 30px; border-right: 1px solid var(--rule); border-bottom: 1px solid var(--ink); background: rgba(252,253,251,.6); }
.notes-grid article:nth-child(2) { background: #e4e9ec; }
.notes-grid article:last-child { border-right: 0; }
.notes-grid span { color: var(--blue); font-size: 11px; font-weight: 800; }
.notes-grid h3 { margin: 47px 0 12px; font-family: var(--serif); font-size: 23px; }
.notes-grid p { margin: 0 0 24px; color: var(--muted); font-size: 13px; }
.notes-grid a { padding-bottom: 3px; border-bottom: 1px solid; font-size: 12px; font-weight: 800; }

.foldout-faq { width: min(1180px, calc(100% - 48px)); margin: 0 auto 120px; display: grid; grid-template-columns: .7fr 1.3fr; align-items: center; }
.faq-cover { position: relative; z-index: 1; margin-right: -18px; padding: clamp(42px, 5vw, 75px); color: white; background: var(--ink); box-shadow: 8px 12px 25px rgba(16,19,23,.24); }
.faq-cover > span { color: #a8bad6; font: 800 10px/1 var(--utility); letter-spacing: .16em; }
.faq-cover h2 { margin: 38px 0 24px; font-size: clamp(38px, 4.5vw, 62px); line-height: 1.15; }
.faq-cover p { color: #cbd0d3; font-size: 13px; }
.text-arrow.light { margin-top: 28px; color: white; }
.faq-pages { padding: 45px 45px 30px 65px; background: var(--paper-white); box-shadow: 0 15px 40px rgba(26,34,39,.14); }
.faq-pages details { border-top: 1px solid var(--ink); }
.faq-pages details:last-of-type { border-bottom: 1px solid var(--ink); }
.faq-pages summary { padding: 20px 0; display: flex; justify-content: space-between; gap: 20px; cursor: pointer; list-style: none; font-family: var(--serif); font-size: 18px; font-weight: 800; }
.faq-pages summary::-webkit-details-marker { display: none; }
.faq-pages summary span { color: var(--red); font-family: var(--sans); }
.faq-pages details[open] summary span { transform: rotate(45deg); }
.faq-pages details p { margin: -4px 40px 22px 0; color: var(--muted); font-size: 13px; }
.faq-footer { display: flex; justify-content: space-between; margin-top: 30px; font: 800 10px/1 var(--utility); letter-spacing: .12em; }
.faq-footer a { color: var(--blue); font-size: 13px; }

.back-cover { padding: 110px 24px 85px; text-align: center; color: white; background: var(--red); }
.back-label { margin: 0 0 25px; font-size: 12px; font-weight: 800; letter-spacing: .1em; }
.back-cover h2 { margin: 0 auto 38px; max-width: 900px; font-size: clamp(46px, 7vw, 92px); line-height: 1.1; }
.button-paper { padding: 15px 28px; color: var(--ink); background: white; }
.button-paper:hover { background: var(--ink); color: white; }
.back-mark { display: block; margin-top: 70px; font: 800 10px/1 var(--utility); letter-spacing: .17em; }

.folio-footer { padding: 48px max(24px, calc((100% - 1260px) / 2)); display: grid; grid-template-columns: 1fr auto; gap: 45px; color: white; background: var(--ink); }
.footer-brand { display: flex; gap: 14px; align-items: center; }
.footer-brand img { display: block; width: 38px; height: 38px; object-fit: contain; }
.footer-brand div { display: flex; flex-direction: column; }
.footer-brand b { font-family: var(--serif); font-size: 23px; }
.footer-brand span { color: #979ea3; font-size: 11px; }
.footer-links { display: flex; gap: 75px; }
.footer-links div { display: grid; grid-template-columns: repeat(3, auto); gap: 20px; align-items: center; font-size: 12px; }
.footer-links b { color: #87909a; }
.footer-links a:hover { color: #95b5ed; }
.footer-folio { grid-column: 1 / -1; padding-top: 16px; display: flex; justify-content: space-between; border-top: 1px solid #454b50; color: #8e969c; font: 700 9px/1 var(--utility); letter-spacing: .1em; }

@media (max-width: 1000px) {
  .folio-nav { grid-template-columns: auto 1fr auto; }
  .issue-line { display: none; }
  .spread-pages { grid-template-columns: 1fr; }
  .spread-pages::after { display: none; }
  .cover-copy { min-height: 700px; border-right: 0; border-bottom: 1px solid var(--ink); }
  .cover-copy h1 { font-size: clamp(76px, 15vw, 128px); }
  .feature-photo { width: 100%; }
  .contents-strip { grid-template-columns: repeat(3, 1fr); }
  .contents-title { grid-column: 1 / -1; min-height: auto; border-right: 0; border-bottom: 1px solid var(--ink); }
  .editorial-feature { grid-template-columns: 100px 1fr; }
  .margin-quote { grid-column: 2; padding-top: 0; }
  .feature-columns { grid-column: 1 / -1; grid-template-columns: repeat(2, 1fr); }
  .feature-columns article:nth-child(2) { border-right: 0; }
  .feature-columns article:nth-child(-n+2) { border-bottom: 1px solid var(--rule); }
  .device-spread { grid-template-columns: 1fr; }
  .notes-heading { grid-template-columns: 150px 1fr; }
  .notes-heading > p { grid-column: 2; }
  .footer-links { gap: 30px; }
}

@media (max-width: 720px) {
  .folio-nav { width: calc(100% - 28px); min-height: 72px; grid-template-columns: auto auto; justify-content: space-between; gap: 12px; }
  .masthead { font-size: 24px; }
  .masthead img { width: 30px; height: 30px; }
  .nav-links { grid-row: 2; grid-column: 1 / -1; width: calc(100vw - 28px); overflow-x: auto; gap: 22px; border-top: 1px solid var(--rule); }
  .nav-links a { padding: 13px 0; white-space: nowrap; }
  .nav-links a[aria-current="page"]::after { bottom: 6px; }
  .download-link { min-width: 100px; padding: 10px 14px; }
  .cover-spread { padding: 18px 14px 45px; }
  .cover-copy { min-height: 650px; padding: 34px 24px 25px; }
  .cover-index { margin-bottom: 34px; }
  .cover-copy h1 { font-size: clamp(64px, 21vw, 96px); }
  .cover-deck { width: 100%; font-size: 17px; }
  .feature-photo { padding: 18px 14px 14px; }
  .hero-media figcaption { grid-template-columns: 1fr; gap: 4px; }
  .contents-strip { width: calc(100% - 28px); margin-bottom: 70px; grid-template-columns: 1fr; }
  .contents-title, .contents-strip > a { min-height: 118px; border-right: 0; border-bottom: 1px solid var(--rule); }
  .editorial-feature { width: calc(100% - 28px); margin-bottom: 80px; grid-template-columns: 1fr; gap: 25px; }
  .section-marker { position: static; }
  .feature-lead { padding: 24px 0 0; border-left: 0; border-top: 1px solid var(--rule); }
  .feature-lead h2 { font-size: 42px; }
  .margin-quote { grid-column: auto; }
  .feature-columns { grid-column: auto; grid-template-columns: 1fr; }
  .feature-columns article { min-height: auto; border-right: 0; border-bottom: 1px solid var(--rule); }
  .feature-columns article:nth-child(2) { border-bottom: 1px solid var(--rule); }
  .feature-columns h3 { margin-top: 22px; }
  .device-spread { width: calc(100% - 28px); margin-bottom: 80px; }
  .device-story { padding: 50px 25px 35px 66px; }
  .device-story dl div { grid-template-columns: 1fr; gap: 3px; }
  .field-notes { width: calc(100% - 28px); margin-bottom: 80px; }
  .notes-heading { grid-template-columns: 1fr; gap: 22px; }
  .notes-heading > p { grid-column: auto; }
  .notes-grid { grid-template-columns: 1fr; }
  .notes-grid article { min-height: 250px; border-right: 0; }
  .foldout-faq { width: calc(100% - 28px); margin-bottom: 80px; grid-template-columns: 1fr; }
  .faq-cover { margin: 0; }
  .faq-pages { padding: 34px 22px 25px; }
  .back-cover { padding: 80px 20px 65px; }
  .back-cover h2 { font-size: 45px; }
  .folio-footer { grid-template-columns: 1fr; }
  .footer-links { flex-direction: column; }
  .footer-links div { grid-template-columns: 58px repeat(3, auto); gap: 13px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

/* Hero media invariant: final high-specificity override keeps source artwork natural. */
.cover-spread .spread-pages { align-items: center; }
.cover-spread .feature-photo { align-self: center; height: auto; padding-top: 28px; padding-bottom: 18px; margin-top: 0; margin-bottom: 0; overflow: visible; transform: none; }
.cover-spread .hero-media { align-self: center; height: auto; min-height: 0; max-height: none; margin: 0; padding: 0; overflow: visible; clip-path: none; transform: none; }
.cover-spread .hero-media img {
  display: block;
  width: 100%;
  height: auto;
  min-height: 0;
  max-height: none;
  margin: 0;
  padding: 0;
  object-fit: contain;
  object-position: center;
  clip-path: none;
  transform: none;
}