:root {
  --bg-deep: #0c1f1a;
  --bg-night: #151a19;
  --green-layer: #13302a;
  --paper: #f2e9d8;
  --paper-shadow: #dcd0b8;
  --orange: #f2603c;
  --orange-dark: #c0431f;
  --signal: #43d3c6;
  --chalk: #f7f5ef;
  --mist: #8d9c93;
  --ink: #141815;
  --line: rgba(247, 245, 239, 0.16);
  --line-strong: rgba(247, 245, 239, 0.3);
  --paper-line: rgba(20, 24, 21, 0.18);
  --container: 1240px;
  --gutter: clamp(16px, 4vw, 48px);
  --font-display: "Arial Narrow", "Helvetica Neue", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --ease-out: cubic-bezier(0.2, 0.7, 0.2, 1);
  --shadow-paper: 0 1px 0 rgba(255, 255, 255, 0.25) inset, 8px 8px 0 rgba(0, 0, 0, 0.22);
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--bg-deep);
  background-image:
    radial-gradient(circle at 12% -8%, rgba(67, 211, 198, 0.1), transparent 38%),
    radial-gradient(circle at 92% 4%, rgba(242, 96, 60, 0.1), transparent 34%),
    linear-gradient(180deg, var(--bg-deep) 0%, #0b1b17 58%, var(--bg-night) 100%);
  color: var(--chalk);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--orange);
  color: var(--ink);
}

img,
svg,
video,
canvas {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

[hidden] {
  display: none !important;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 0.55em;
  color: var(--chalk);
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.02;
}

h1 {
  font-size: clamp(2.6rem, 7vw, 6.4rem);
}

h2 {
  font-size: clamp(1.8rem, 4vw, 3.4rem);
}

h3 {
  font-size: clamp(1.25rem, 2.4vw, 1.8rem);
}

p {
  margin: 0 0 1.2em;
  max-width: 34em;
}

ul,
ol {
  margin-top: 0;
}

:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  transform: translateY(-180%);
  padding: 10px 14px;
  background: var(--orange);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  line-height: 1.2;
  text-decoration: none;
  text-transform: uppercase;
  transition: transform 180ms var(--ease-out);
}

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

.container {
  width: min(100%, calc(var(--container) + var(--gutter) + var(--gutter)));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid {
  display: grid;
  gap: clamp(20px, 4vw, 40px);
}

.grid--7-5 {
  grid-template-columns: minmax(0, 7fr) minmax(260px, 5fr);
}

.grid--8-4 {
  grid-template-columns: minmax(0, 8fr) minmax(240px, 4fr);
}

.section {
  position: relative;
  padding: clamp(48px, 8vw, 110px) 0;
}

.section-marker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  line-height: 1.2;
  text-transform: uppercase;
}

.section-marker::before {
  content: "";
  flex: 0 0 auto;
  width: clamp(28px, 6vw, 72px);
  height: 3px;
  background: var(--orange);
}

.eyebrow {
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  line-height: 1.4;
  text-transform: uppercase;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45em;
  min-height: 42px;
  padding: 10px 16px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  text-transform: uppercase;
  transition: background 200ms var(--ease-out), border-color 200ms var(--ease-out), color 200ms var(--ease-out), transform 200ms var(--ease-out);
}

.button:hover {
  transform: translateY(-1px);
}

.button--orange {
  border-color: var(--orange);
  background: var(--orange);
  color: var(--ink);
}

.button--orange:hover {
  border-color: var(--orange-dark);
  background: var(--orange-dark);
  color: var(--chalk);
}

.button--signal {
  border-color: var(--signal);
  background: var(--signal);
  color: var(--ink);
}

.button--signal:hover {
  border-color: #2fbdb1;
  background: #2fbdb1;
  color: var(--ink);
}

.button--ghost {
  border-color: var(--line-strong);
  background: transparent;
  color: var(--chalk);
}

.button--ghost:hover {
  border-color: var(--orange);
  color: var(--orange);
}

.paper-card {
  position: relative;
  padding: clamp(20px, 3vw, 40px);
  border: 1px solid var(--paper-shadow);
  background: var(--paper);
  box-shadow: var(--shadow-paper);
  color: var(--ink);
}

.paper-card a {
  color: var(--orange-dark);
}

.paper-card--stacked {
  isolation: isolate;
}

.paper-card--stacked::before {
  content: "";
  position: absolute;
  inset: 8px -8px -8px 8px;
  z-index: -1;
  border: 1px solid rgba(20, 24, 21, 0.12);
  background: var(--paper-shadow);
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 9px;
  border: 1px solid rgba(67, 211, 198, 0.4);
  background: rgba(67, 211, 198, 0.07);
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.13em;
  line-height: 1.2;
  text-transform: uppercase;
}

.breadcrumbs {
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  line-height: 1.5;
}

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  color: var(--orange);
}

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

.breadcrumbs a:hover {
  color: var(--chalk);
}

.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, var(--green-layer), var(--bg-night));
}

.media-frame--wide {
  aspect-ratio: 21 / 9;
}

.media-frame--portrait {
  aspect-ratio: 4 / 5;
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.05);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  box-shadow: inset 0 0 0 1px rgba(247, 245, 239, 0.06);
  pointer-events: none;
}

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

.accordion__item {
  border-bottom: 1px solid var(--line);
}

.accordion__button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 18px 0;
  border: 0;
  background: transparent;
  color: var(--chalk);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  text-align: left;
}

.accordion__button::after {
  content: "+";
  flex: 0 0 auto;
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
}

.accordion__button[aria-expanded="true"]::after {
  content: "–";
  color: var(--signal);
}

.accordion__panel {
  padding: 0 0 20px;
  color: var(--mist);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 420ms var(--ease-out), transform 420ms var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--line);
  background: rgba(12, 31, 26, 0.9);
  color: var(--chalk);
  backdrop-filter: blur(16px);
  transition: background 250ms var(--ease-out), border-color 250ms var(--ease-out), box-shadow 250ms var(--ease-out);
}

.site-header[data-scrolled] {
  background: rgba(12, 31, 26, 0.97);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.18);
}

.site-header[data-open] {
  background: var(--bg-night);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 200;
  width: 3px;
  height: 100vh;
  background: rgba(247, 245, 239, 0.08);
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleY(var(--scroll-progress, 0));
  transform-origin: top;
  background: linear-gradient(180deg, var(--orange), var(--signal));
}

.masthead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: clamp(14px, 3vw, 36px);
  width: min(100%, calc(var(--container) + var(--gutter) + var(--gutter)));
  margin-inline: auto;
  padding: clamp(16px, 2.8vw, 28px) var(--gutter) clamp(12px, 2vw, 18px);
  transition: padding 280ms var(--ease-out);
}

.masthead__rail {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
  transition: opacity 200ms var(--ease-out), visibility 200ms var(--ease-out), transform 200ms var(--ease-out);
}

.masthead__rail--left {
  flex-wrap: wrap;
  justify-self: start;
  row-gap: 2px;
}

.masthead__rail--right {
  justify-self: end;
  justify-content: flex-end;
}

.index-label,
.edition {
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  line-height: 1.4;
  text-transform: uppercase;
  white-space: nowrap;
}

.edition {
  color: var(--signal);
}

.brand {
  display: block;
  color: var(--chalk);
  text-align: center;
  text-decoration: none;
}

.brand__name {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.8vw, 3.4rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 0.9;
  transition: font-size 280ms var(--ease-out);
}

.brand__sub {
  display: block;
  margin-top: 8px;
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: clamp(8px, 0.66vw, 10px);
  letter-spacing: 0.18em;
  line-height: 1.5;
  text-transform: uppercase;
  white-space: nowrap;
  transition: opacity 200ms var(--ease-out), visibility 200ms var(--ease-out), transform 200ms var(--ease-out);
}

.masthead__link {
  padding: 8px 2px;
  border-bottom: 1px solid transparent;
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  line-height: 1.2;
  text-decoration: none;
  transition: color 200ms var(--ease-out), border-color 200ms var(--ease-out);
}

.masthead__link:hover {
  border-color: var(--orange);
  color: var(--chalk);
}

.masthead__cta {
  min-height: 38px;
  padding: 8px 14px;
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 8px 0 8px 10px;
  border: 0;
  background: transparent;
  color: var(--chalk);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  line-height: 1.2;
  text-transform: uppercase;
}

.nav-toggle[aria-expanded="true"] {
  color: var(--signal);
}

.nav-toggle__icon {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 22px;
  height: 18px;
}

.nav-toggle__icon span {
  display: block;
  width: 100%;
  height: 2px;
  background: currentColor;
  transform-origin: center;
  transition: transform 240ms var(--ease-out), opacity 200ms var(--ease-out);
}

.nav-toggle__label {
  display: inline-block;
}

.site-header[data-open] .nav-toggle__icon span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.site-header[data-open] .nav-toggle__icon span:nth-child(2) {
  opacity: 0;
}

.site-header[data-open] .nav-toggle__icon span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.site-nav {
  width: min(100%, calc(var(--container) + var(--gutter) + var(--gutter)));
  margin-inline: auto;
  padding: 0 var(--gutter) 14px;
  transition: padding 240ms var(--ease-out);
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: clamp(8px, 2.4vw, 32px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 9px 2px 8px;
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.17em;
  line-height: 1.2;
  text-decoration: none;
  text-transform: uppercase;
  transition: color 200ms var(--ease-out);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 1px;
  left: 0;
  height: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 240ms var(--ease-out);
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--chalk);
}

.site-nav__link:hover::after {
  transform: scaleX(1);
}

.site-nav__link[aria-current="page"] {
  color: var(--chalk);
}

.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.site-header[data-scrolled] .masthead {
  padding-top: 10px;
  padding-bottom: 8px;
}

.site-header[data-scrolled] .brand__name {
  font-size: clamp(1.25rem, 2.1vw, 1.9rem);
}

.site-header[data-scrolled] .brand__sub,
.site-header[data-scrolled] .masthead__rail--left {
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  pointer-events: none;
}

.site-header[data-scrolled] .site-nav {
  padding-bottom: 8px;
}

.site-header[data-scrolled] .site-nav__link {
  padding-top: 7px;
  padding-bottom: 6px;
}

.quick-bar {
  display: none;
  grid-template-columns: repeat(4, 1fr);
  position: fixed;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 120;
  padding: 6px max(8px, env(safe-area-inset-left)) calc(6px + env(safe-area-inset-bottom)) max(8px, env(safe-area-inset-right));
  border-top: 1px solid var(--line);
  background: rgba(21, 26, 25, 0.97);
  backdrop-filter: blur(12px);
}

.quick-bar__link {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  border: 1px solid transparent;
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  line-height: 1.2;
  text-decoration: none;
  text-transform: uppercase;
}

.quick-bar__link:hover,
.quick-bar__link:focus-visible {
  border-color: var(--line);
  color: var(--chalk);
}

.quick-bar__link[aria-current="page"] {
  color: var(--signal);
}

.site-footer {
  position: relative;
  overflow: hidden;
  margin-top: clamp(70px, 12vw, 150px);
  border-top: 1px solid var(--line);
  background: var(--bg-night);
  color: var(--chalk);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 6px;
  background: linear-gradient(90deg, var(--orange) 0 18%, transparent 18% 42%, var(--signal) 42% 46%, transparent 46% 100%);
  opacity: 0.9;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.9fr 0.85fr 1.2fr;
  gap: clamp(24px, 4vw, 56px);
  width: min(100%, calc(var(--container) + var(--gutter) + var(--gutter)));
  margin-inline: auto;
  padding: clamp(44px, 6vw, 80px) var(--gutter) clamp(28px, 4vw, 46px);
}

.footer-brand,
.footer-nav,
.footer-actions,
.footer-contact {
  min-width: 0;
}

.footer-brand__name {
  display: inline-block;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--orange);
  color: var(--chalk);
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.7rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1;
  text-decoration: none;
}

.footer-brand__line {
  margin: 18px 0 10px;
  color: var(--paper);
  font-size: 14px;
  line-height: 1.7;
  max-width: 22em;
}

.footer-brand__meta {
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  line-height: 1.6;
  text-transform: uppercase;
}

.footer-heading {
  margin: 0 0 18px;
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.2em;
  line-height: 1.4;
  text-transform: uppercase;
}

.footer-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-list a {
  color: var(--mist);
  font-size: 13px;
  line-height: 1.6;
  text-decoration: none;
  transition: color 180ms var(--ease-out);
}

.footer-list a:hover,
.footer-list a:focus-visible {
  color: var(--chalk);
}

.footer-address {
  display: grid;
  gap: 9px;
  margin: 0;
  color: var(--mist);
  font-size: 13px;
  font-style: normal;
  line-height: 1.6;
}

.footer-address span {
  display: block;
}

.footer-note {
  margin: 16px 0 0;
  color: var(--mist);
  font-size: 12px;
  line-height: 1.7;
  max-width: 32em;
}

.footer-legal {
  margin: 18px 0 0;
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  line-height: 1.5;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  width: min(100%, calc(var(--container) + var(--gutter) + var(--gutter)));
  margin-inline: auto;
  padding: 18px var(--gutter) 22px;
  border-top: 1px solid var(--line);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  line-height: 1.5;
  text-transform: uppercase;
}

.footer-coord {
  color: var(--mist);
}

@media (max-width: 1100px) {
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 960px) {
  .grid--7-5,
  .grid--8-4 {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 860px) {
  body {
    padding-bottom: calc(64px + env(safe-area-inset-bottom));
  }

  .masthead {
    grid-template-columns: 1fr auto 1fr;
    gap: 8px;
    padding-top: 14px;
    padding-bottom: 10px;
  }

  .masthead__rail--left {
    justify-self: start;
  }

  .index-label {
    display: none;
  }

  .edition {
    max-width: 96px;
    font-size: 9px;
    letter-spacing: 0.1em;
    white-space: normal;
  }

  .masthead__link,
  .masthead__cta {
    display: none;
  }

  .masthead__rail--right {
    gap: 0;
  }

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

  .brand__name {
    font-size: clamp(1.45rem, 7vw, 2.1rem);
  }

  .brand__sub {
    max-width: 140px;
    margin-inline: auto;
    font-size: 8px;
    letter-spacing: 0.08em;
    line-height: 1.4;
    white-space: normal;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    width: 100%;
    max-height: 0;
    padding: 0 var(--gutter);
    overflow: hidden;
    visibility: hidden;
    opacity: 0;
    background: rgba(21, 26, 25, 0.98);
    border-bottom: 1px solid var(--line);
    transition: max-height 320ms var(--ease-out), opacity 200ms var(--ease-out), visibility 200ms var(--ease-out), padding 320ms var(--ease-out);
  }

  .site-header[data-open] .site-nav {
    max-height: min(72vh, 520px);
    padding-top: 10px;
    padding-bottom: 20px;
    overflow: auto;
    visibility: visible;
    opacity: 1;
  }

  .site-nav__list {
    display: block;
  }

  .site-nav__list > li + li {
    border-top: 1px solid var(--line);
  }

  .site-nav__link {
    display: flex;
    justify-content: space-between;
    padding: 14px 2px;
    font-size: 12px;
  }

  .site-nav__link::after {
    bottom: 0;
    height: 1px;
  }

  .site-header[data-scrolled] .masthead__rail--left {
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
  }

  .quick-bar {
    display: grid;
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav-toggle__label {
    display: none;
  }

  .site-nav__link {
    letter-spacing: 0.1em;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: opacity 120ms linear;
    transition-delay: 0ms;
  }

  .button:hover {
    transform: none;
  }

  .site-nav__link::after {
    transition: none;
  }
}