@font-face {
  font-family:AtlasSerif;
  src:url('assets/atlas-serif.ttf') format('truetype');
  font-weight:500;
  font-style:normal;
  font-display:swap;
}
@font-face {
  font-family:AtlasSans;
  src:url('assets/atlas-sans.ttf') format('truetype');
  font-weight:400;
  font-style:normal;
  font-display:swap;
}
:root {
  --paper:#f9f8f4;
  --ink:#23372e;
  --body:#5b655e;
  --muted:#7a817b;
  --gold:#a88750;
  --line:#dcded5;
  --gutter:clamp(24px,5.2vw,88px);
  --serif:AtlasSerif,"Songti SC",serif;
  --sans:AtlasSans,"PingFang SC","Microsoft YaHei",sans-serif;
}
* {
  box-sizing:border-box;
}
html {
  scroll-behavior:smooth;
  scroll-padding-top:105px;
}
body {
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
p,h1,h2,figure {
  margin:0;
}
a {
  color:inherit;
  text-decoration:none;
}
button {
  font:inherit;
  color:inherit;
  cursor:pointer;
}
img {
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
a,button {
  -webkit-tap-highlight-color:transparent;
}
a:focus-visible,button:focus-visible {
  outline:2px solid var(--gold);
  outline-offset:5px;
}
svg {
  display:block;
}
header {
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0 var(--gutter);
  height:80px;
  position:sticky;
  top:0;
  background:#f9f8f4f5;
  z-index:50;
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(15px);
}
.brand {
  font-family:var(--serif);
  font-size:24px;
  letter-spacing:5px;
  display:flex;
  gap:20px;
  align-items:center;
}
.brand span {
  font-family:var(--sans);
  font-size:11px;
  color:var(--muted);
  letter-spacing:2px;
  padding-left:20px;
  border-left:1px solid var(--line);
}
nav {
  display:flex;
  gap:36px;
  font-size:12px;
  letter-spacing:1px;
}
nav a {
  padding:14px 0;
  position:relative;
}
nav a:after {
  content:"";
  position:absolute;
  left:0;
  bottom:6px;
  width:100%;
  height:1px;
  background:var(--gold);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .4s;
}
nav a:hover:after,nav a.active:after {
  transform:scaleX(1);
}
.menu {
  display:none;
  background:none;
  border:none;
  padding:12px 0;
  font-size:12px;
  letter-spacing:2px;
}
.page {
  max-width:1600px;
  margin:auto;
  padding:0 var(--gutter);
}
.cover-head {
  padding:54px 0 39px;
  display:grid;
  grid-template-columns:1fr .9fr;
  align-items:center;
  gap:90px;
}
h1 {
  font-family:var(--serif);
  font-weight:500;
  display:flex;
  align-items:baseline;
  gap:24px;
  white-space:nowrap;
}
.title-place {
  font-size:clamp(76px,8vw,115px);
  line-height:1.3;
  letter-spacing:.08em;
}
.title-subject {
  font-size:clamp(26px,2.45vw,38px);
  line-height:1.8;
  letter-spacing:.08em;
}
.cover-lead {
  font-size:16px;
  line-height:2.1;
  letter-spacing:.025em;
  color:var(--body);
  max-width:535px;
  text-align:justify;
}
.cover-media {
  aspect-ratio:2.17;
  overflow:hidden;
  background:#e2e8e1;
  position:relative;
}
.cover-media img {
  object-position:50% 50%;
  animation:gentle-zoom 22s ease-in-out infinite alternate;
}
.cover-media button {
  padding:0;
  border:0;
  background:none;
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  cursor:zoom-in;
}
.caption {
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  gap:20px;
  padding-top:13px;
  font-size:11px;
  letter-spacing:.09em;
  color:var(--muted);
  line-height:1.7;
}
.caption a {
  font-size:10px;
  letter-spacing:.05em;
  display:flex;
  align-items:center;
  gap:6px;
  flex-shrink:0;
}
.caption a:hover {
  color:var(--gold);
}
.caption svg {
  width:11px;
  height:11px;
}
.cover-foot {
  display:flex;
  justify-content:space-between;
  align-items:center;
  border-bottom:1px solid var(--line);
  padding:34px 0 32px;
}
.read-link {
  display:flex;
  align-items:center;
  gap:17px;
  font-size:12px;
  letter-spacing:2px;
}
.read-link .circle {
  width:32px;
  height:32px;
  border:1px solid #aeb9ac;
  border-radius:50%;
  display:grid;
  place-items:center;
}
.read-link svg {
  width:14px;
  height:14px;
}
.cover-chapters {
  display:flex;
  gap:34px;
}
.cover-chapters a {
  font-size:12px;
  letter-spacing:1px;
  color:var(--body);
  display:flex;
  gap:11px;
  align-items:center;
}
.roman {
  font-family:Georgia,serif;
  color:var(--gold);
  font-size:13px;
  letter-spacing:1px;
}
.chapter {
  padding:98px 0 104px;
  border-bottom:1px solid var(--line);
  scroll-margin-top:22px;
}
.chapter-marker {
  display:flex;
  align-items:center;
  gap:16px;
  font-size:11px;
  letter-spacing:2px;
  color:var(--muted);
  margin-bottom:35px;
}
.chapter-marker:after {
  content:"";
  height:1px;
  width:45px;
  background:#b8b9aa;
}
.chapter-marker .num {
  font-family:Georgia,serif;
  color:var(--gold);
  font-size:15px;
}
.history-layout {
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:clamp(55px,7vw,110px);
  align-items:start;
}
.history-copy {
  padding-top:24px;
}
.chapter h2 {
  font-family:var(--serif);
  font-size:clamp(31px,3.3vw,48px);
  line-height:1.55;
  font-weight:500;
  letter-spacing:.015em;
}
.body-copy {
  font-size:16px;
  line-height:2.1;
  letter-spacing:.025em;
  color:var(--body);
  text-align:justify;
  margin-top:26px;
}
.history-main .image-frame {
  aspect-ratio:.95;
}
.history-main img {
  object-position:52% center;
}
.image-frame {
  overflow:hidden;
  background:#e4e8e0;
  position:relative;
}
.image-frame button {
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  background:none;
  border:0;
  cursor:zoom-in;
}
.image-frame img {
  transition:transform 1.2s cubic-bezier(.2,.6,.2,1);
}
.image-frame:hover img {
  transform:scale(1.025);
}
.history-detail {
  margin-top:42px;
  max-width:380px;
  margin-left:auto;
}
.history-detail .image-frame {
  aspect-ratio:1.73;
}
.history-detail img {
  object-position:50% 45%;
}
.economy-layout {
  display:grid;
  grid-template-columns:.95fr 1.05fr;
  gap:clamp(55px,8vw,120px);
  align-items:center;
}
.economy-copy .body-copy {
  margin-top:28px;
  max-width:480px;
}
.figure-economy .image-frame {
  aspect-ratio:1.9;
}
.figure-economy img {
  object-position:27% 50%;
}
.metric {
  font-family:Georgia,serif;
  color:var(--gold);
  font-size:32px;
  line-height:1;
  letter-spacing:-1px;
  vertical-align:-2px;
}
.industry-heading {
  display:grid;
  grid-template-columns:.85fr 1.15fr;
  gap:100px;
  align-items:start;
  margin-bottom:47px;
}
.industry-heading .body-copy {
  margin-top:4px;
  max-width:680px;
}
.industry-images {
  display:grid;
  grid-template-columns:1.28fr .72fr;
  gap:36px;
  align-items:end;
}
.industry-main .image-frame {
  aspect-ratio:1.2;
}
.industry-main img {
  object-position:50% 62%;
}
.industry-side {
  padding-bottom:55px;
}
.industry-side .image-frame {
  aspect-ratio:1.28;
}
.industry-side img {
  object-position:50% 50%;
}
.industry-side .caption {
  flex-wrap:wrap;
  gap:5px;
}
.ecology-heading {
  display:grid;
  grid-template-columns:.7fr 1.3fr;
  gap:90px;
  align-items:start;
  margin-bottom:45px;
}
.ecology-heading .body-copy {
  margin-top:3px;
  max-width:730px;
}
.ecology-images {
  display:grid;
  grid-template-columns:.9fr 1.1fr;
  gap:30px;
  align-items:center;
}
.ecology-evening .image-frame {
  aspect-ratio:1.48;
}
.ecology-rail .image-frame {
  aspect-ratio:1.65;
}
.ecology-evening img {
  object-position:50% 55%;
}
.footer {
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:39px 0 48px;
}
.footer strong {
  font-family:var(--serif);
  font-weight:500;
  font-size:29px;
  letter-spacing:7px;
}
.footer a {
  font-size:11px;
  letter-spacing:2px;
  display:flex;
  align-items:center;
  gap:12px;
}
.footer svg {
  width:13px;
  height:13px;
}
.reading-progress {
  height:2px;
  background:var(--gold);
  position:fixed;
  top:0;
  left:0;
  width:0;
  z-index:100;
}
.lightbox {
  border:0;
  padding:0;
  background:#13231f;
  color:white;
  width:calc(100vw - 60px);
  max-width:1300px;
  max-height:92svh;
  box-shadow:0 30px 100px #0005;
  overflow:auto;
}
.lightbox::backdrop {
  background:#101d1aea;
  backdrop-filter:blur(6px);
}
.lightbox-head {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:17px 22px;
  position:sticky;
  top:0;
  background:#13231ff5;
  z-index:1;
  font-size:12px;
  letter-spacing:1px;
}
.lightbox-head button {
  background:none;
  color:#fff;
  border:1px solid #65796d;
  padding:8px 12px;
  font-size:12px;
}
.lightbox img {
  width:100%;
  height:auto;
  max-height:73svh;
  object-fit:contain;
}
.lightbox-footer {
  padding:18px 22px;
  font-size:11px;
  color:#b5c0b7;
  display:flex;
  justify-content:space-between;
  gap:20px;
}
.lightbox-footer a {
  text-decoration:underline;
  text-underline-offset:3px;
}
.reveal {
  opacity:1;
  transform:none;
}
.motion-enabled .reveal {
  opacity:0;
  transform:translateY(28px);
  transition:opacity 1s,transform 1s cubic-bezier(.18,.7,.25,1);
}
.motion-enabled .reveal.visible {
  opacity:1;
  transform:none;
}
.delay {
  transition-delay:.13s!important;
}
@keyframes gentle-zoom{
  from {
    transform:scale(1);
  }
  to {
    transform:scale(1.045);
  }
}
@media(max-width:1080px){
  .cover-head {
    gap:45px;
  }
  .title-place {
    font-size:86px;
  }
  .title-subject {
    font-size:27px;
  }
  h1 {
    gap:17px;
  }
  .cover-lead {
    font-size:15px;
  }
  .cover-chapters {
    gap:19px;
  }
  .history-layout {
    gap:55px;
  }
  .industry-heading,.ecology-heading {
    gap:55px;
  }
  .industry-images {
    gap:25px;
  }
  .chapter {
    padding:80px 0;
  }
  .history-detail {
    margin-top:30px;
  }
  .caption {
    gap:12px;
  }
}
@media(max-width:740px){
  html {
    scroll-padding-top:85px;
  }
  header {
    height:66px;
  }
  .brand {
    font-size:22px;
    gap:14px;
  }
  .brand span {
    padding-left:14px;
    font-size:10px;
    letter-spacing:1px;
  }
  .menu {
    display:block;
  }
  nav {
    display:none;
    position:absolute;
    top:66px;
    left:0;
    right:0;
    background:var(--paper);
    border-bottom:1px solid var(--line);
    padding:17px var(--gutter);
    justify-content:space-between;
    gap:12px;
    font-size:11px;
  }
  nav.open {
    display:flex;
  }
  .cover-head {
    display:block;
    padding:32px 0 27px;
  }
  h1 {
    gap:18px;
  }
  .title-place {
    font-size:67px;
    line-height:1.35;
    letter-spacing:.065em;
  }
  .title-subject {
    font-size:24px;
    letter-spacing:.06em;
  }
  .cover-lead {
    margin-top:21px;
    font-size:15px;
    line-height:2.1;
    letter-spacing:.02em;
  }
  .cover-media {
    aspect-ratio:.97;
    margin:0 -24px;
  }
  .cover-media img {
    object-position:39% center;
  }
  .cover-caption {
    font-size:10px;
    padding-top:13px;
    gap:12px;
  }
  .caption a {
    font-size:9px;
  }
  .cover-foot {
    padding:25px 0 27px;
    display:block;
  }
  .read-link {
    font-size:11px;
    gap:12px;
  }
  .read-link .circle {
    width:29px;
    height:29px;
  }
  .cover-chapters {
    margin-top:24px;
    justify-content:space-between;
    gap:10px;
  }
  .cover-chapters a {
    font-size:10px;
    display:flex;
    flex-direction:column;
    gap:5px;
    letter-spacing:.4px;
  }
  .cover-chapters .roman {
    font-size:11px;
  }
  .chapter {
    padding:59px 0 62px;
  }
  .chapter-marker {
    margin-bottom:23px;
    font-size:10px;
  }
  .chapter-marker .num {
    font-size:13px;
  }
  .history-layout,.economy-layout {
    display:flex;
    flex-direction:column;
    gap:28px;
    align-items:stretch;
  }
  .chapter h2 {
    font-size:30px;
    line-height:1.6;
  }
  .body-copy {
    font-size:16px;
    line-height:2.05;
    letter-spacing:.02em;
    margin-top:20px;
  }
  .history-copy {
    padding:0;
    display:contents;
  }
  .history-copy h2 {
    order:0;
  }
  .history-copy>.body-copy {
    order:1;
    margin-top:-8px;
  }
  .history-main {
    order:2;
  }
  .history-main .image-frame {
    aspect-ratio:1.08;
  }
  .history-detail {
    order:3;
    margin-top:8px;
    width:75%;
    max-width:none;
    margin-left:auto;
  }
  .history-detail .caption {
    flex-direction:column;
    gap:2px;
  }
  .history-detail .image-frame {
    aspect-ratio:1.65;
  }
  .economy-layout {
    gap:29px;
  }
  .economy-copy .body-copy {
    margin-top:18px;
  }
  .figure-economy .image-frame {
    aspect-ratio:1.52;
  }
  .metric {
    font-size:29px;
  }
  .industry-heading,.ecology-heading {
    display:block;
    margin-bottom:29px;
  }
  .industry-heading .body-copy,.ecology-heading .body-copy {
    margin-top:20px;
  }
  .industry-images {
    display:block;
  }
  .industry-main .image-frame {
    aspect-ratio:1.03;
  }
  .industry-side {
    padding:0;
    margin-top:33px;
    max-width:75%;
    margin-left:auto;
  }
  .industry-side .image-frame {
    aspect-ratio:1.2;
  }
  .industry-side .caption {
    font-size:10px;
  }
  .ecology-images {
    display:flex;
    flex-direction:column;
    gap:28px;
    align-items:stretch;
  }
  .ecology-evening .image-frame {
    aspect-ratio:1.28;
  }
  .ecology-rail {
    margin-left:32px;
  }
  .ecology-rail .image-frame {
    aspect-ratio:1.6;
  }
  .caption {
    font-size:10px;
    letter-spacing:.03em;
    gap:10px;
  }
  .footer {
    padding:28px 0 35px;
  }
  .footer strong {
    font-size:25px;
  }
  .footer a {
    font-size:10px;
  }
  .lightbox {
    width:calc(100vw - 24px);
  }
  .lightbox-head {
    padding:13px;
    font-size:11px;
  }
  .lightbox-footer {
    padding:14px;
    font-size:10px;
    flex-wrap:wrap;
  }
}
@media(max-width:350px){
  h1 {
    gap:12px;
  }
  .title-place {
    font-size:58px;
  }
  .title-subject {
    font-size:22px;
  }
  .cover-chapters {
    gap:6px;
  }
  .cover-chapters a {
    font-size:9px;
  }
  .caption a {
    font-size:8px;
  }
}
@media(prefers-reduced-motion:reduce){
  html {
    scroll-behavior:auto;
  }
  .cover-media img {
    animation:none;
  }
  .image-frame img {
    transition:none;
  }
  .motion-enabled .reveal {
    opacity:1;
    transform:none;
    transition:none;
  }
}
/* Progressive enhancement: source images and section copy remain visible. */
.open-image {
  display: none; }
  .interactions-enabled .open-image {
    display: block; }
    @media (max-width: 740px) {
      body:not(.interactions-enabled) .menu {
        display: none; }
        body:not(.interactions-enabled) nav {
          display: flex; position: static; padding: 12px 0; border: 0; flex-wrap: wrap; }
          body:not(.interactions-enabled) header {
            height: auto; min-height: 66px; flex-wrap: wrap; }
          }
          img.image-failed {
            object-fit: contain; color: var(--ink); font-size: 14px; }
            .lightbox img.image-failed {
              color: white; min-height: 120px; }

/* Photo controls touch the clipped frame edges: draw focus entirely inside. */
.open-image:focus-visible {
  outline: 3px solid var(--paper);
  outline-offset: -5px;
  box-shadow: inset 0 0 0 8px var(--ink);
}