/* ═══════════════════════════════════════════════════
   БЕРЁЗЫ / STUDIO — Design System v2.0
   苏东构成主义 · 后现代档案美学 · 黑白主调
   ═══════════════════════════════════════════════════ */

:root {
  color-scheme: light;
  --bg: #FFFFFF;
  --ink: #0A0A0A;
  --red: #CC0000;
  --line: #D5D5D5;
  --soft: #F2F2F2;
  --dark: #0A0A0A;
  --muted: #6B6B6B;
  --border-w: 1px;
  --gutter: clamp(20px, 5vw, 64px);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  overflow-y: auto;
  overflow-x: hidden;
  height: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-y: auto;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: "Times New Roman", "Georgia", "Noto Serif SC", "宋体", serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
img { display: block; width: 100%; }

/* ═══════════════════════════════════════════════════
   HEADER — 黑色档案条
   ═══════════════════════════════════════════════════ */

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding: 6px var(--gutter);
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: background 0.4s ease, border-color 0.4s ease;
}

.site-header.is-scrolled {
  background: #000000;
  border-bottom: var(--border-w) solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  line-height: 1;
}

.brand-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 40px; height: 40px;
  padding: 4px;
  background: #FFFFFF;
  border: var(--border-w) solid #FFFFFF;
}

.brand-logo {
  width: 100%; height: 100%;
  object-fit: contain;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0;
  line-height: 1.1;
}

.brand-text span {
  color: #FFFFFF;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.brand-text strong {
  color: rgba(255,255,255,0.45);
  font-size: 0.52rem;
  font-weight: 900;
  letter-spacing: 0.26em;
  text-transform: uppercase;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 3vw, 36px);
  color: rgba(255,255,255,0.75);
  font-size: 0.66rem;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  white-space: nowrap;
}

.primary-nav a,
.tool-menu button {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
  border: 0;
  background: transparent;
  color: inherit;
  padding: 6px 0;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.nav-en { font-size: inherit; letter-spacing: 0.16em; }
.nav-cn {
  font-size: 0.46rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: none;
  opacity: 0.45;
}

.primary-nav a::after,
.tool-menu button::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 200ms ease;
}

.primary-nav a:hover::after,
.tool-menu button:hover::after {
  transform: scaleX(1);
}

.nav-cta {
  display: inline-flex !important;
  align-items: center;
  gap: 6px;
  padding: 8px 18px !important;
  border: var(--border-w) solid rgba(255,255,255,0.3) !important;
  background: transparent !important;
  color: #FFFFFF !important;
  font-size: 0.62rem !important;
  font-weight: 900 !important;
  letter-spacing: 0.18em !important;
  transition: all 0.3s ease;
}

.nav-cta:hover {
  background: var(--red) !important;
  color: #FFFFFF !important;
  border-color: var(--red) !important;
}

.nav-cta::after { display: none !important; }

/* Tool dropdown */
.tool-menu { position: relative; }

.tool-menu::before {
  content: "";
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  height: 18px;
  z-index: 5;
}

.tool-panel {
  position: absolute;
  top: calc(100% + 16px);
  right: 0;
  width: 240px;
  display: none;
  padding: 4px;
  background: #000000;
  border: var(--border-w) solid rgba(255,255,255,0.15);
  box-shadow: 0 16px 48px rgba(0,0,0,0.6);
}

.tool-panel.is-open,
.tool-menu:hover .tool-panel {
  display: grid;
  gap: 2px;
}

.tool-panel a {
  padding: 12px 14px;
  background: transparent;
  color: rgba(255,255,255,0.65);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-family: "Times New Roman", "Georgia", serif;
}

.tool-panel a:hover {
  background: var(--red);
  color: #FFFFFF;
}

/* Language menu — wider panel */
.lang-menu .tool-panel {
  width: 190px;
}

/* ═══════════════════════════════════════════════════
   HERO — 全屏档案封面
   ═══════════════════════════════════════════════════ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: flex-end;
  padding: 120px var(--gutter) clamp(60px, 10vh, 100px);
  overflow: hidden;
  isolation: isolate;
}

.hero-video {
  position: absolute;
  inset: 0; z-index: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  filter: brightness(0.4) saturate(0.3) contrast(1.1);
  pointer-events: none;
}

.hero-overlay {
  position: absolute;
  inset: 0; z-index: 1;
  background:
    linear-gradient(180deg,
      rgba(0,0,0,0.35) 0%,
      rgba(0,0,0,0.1) 35%,
      rgba(0,0,0,0.55) 70%,
      rgba(0,0,0,0.85) 100%
    );
  pointer-events: none;
}

/* Constructivist diagonal accent */
.hero-overlay::after {
  content: "";
  position: absolute;
  top: 0; right: 0;
  width: 35%;
  height: 100%;
  background: linear-gradient(
    105deg,
    transparent 0%,
    rgba(204,0,0,0.06) 50%,
    transparent 100%
  );
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 3;
  max-width: 780px;
}

.hero-tag {
  margin: 0 0 20px;
  color: rgba(255,255,255,0.4);
  font-size: 0.64rem;
  font-weight: 900;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  font-family: "Times New Roman", "Georgia", serif;
}

.hero h1 {
  color: #FFFFFF;
  font-size: clamp(3.6rem, 8vw, 8.5rem);
  line-height: 1.04;
  font-weight: 950;
  letter-spacing: -0.02em;
  margin: 0 0 26px;
  font-family: "Times New Roman", "Georgia", serif;
}

.hero-desc {
  max-width: 520px;
  margin: 0 0 38px;
  color: rgba(255,255,255,0.58);
  font-size: clamp(0.9rem, 1.15vw, 1.05rem);
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.02em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 14px 28px;
  border: var(--border-w) solid rgba(255,255,255,0.3);
  background: transparent;
  color: #FFFFFF;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-family: "Times New Roman", "Georgia", serif;
  transition: all 0.35s ease;
}

.hero-cta:hover {
  background: var(--red);
  color: #FFFFFF;
  border-color: var(--red);
  gap: 22px;
}

.cta-arrow {
  display: inline-block;
  font-size: 1.1rem;
  transition: transform 0.35s ease;
}

.hero-cta:hover .cta-arrow {
  transform: translateX(5px);
}

h1, h2, h3, p { margin-top: 0; }

h1 {
  margin-bottom: 26px;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1.04;
  font-weight: 950;
  font-family: "Times New Roman", "Georgia", serif;
}

/* ═══════════════════════════════════════════════════
   SECTION SHARED
   ═══════════════════════════════════════════════════ */

.collections {
  padding: clamp(72px, 8vw, 110px) var(--gutter);
  border-bottom: var(--border-w) solid var(--line);
}

.featured {
  padding: clamp(72px, 8vw, 110px) 0;
  border-bottom: var(--border-w) solid var(--line);
}

.studio {
  display: grid;
  grid-template-columns: minmax(280px, 0.48fr) minmax(0, 1fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
  padding: clamp(72px, 8vw, 110px) var(--gutter);
  border-bottom: var(--border-w) solid var(--line);
}

.cooperation {
  display: grid;
  grid-template-columns: minmax(260px, 0.45fr) minmax(0, 1fr);
  gap: clamp(36px, 6vw, 88px);
  padding: clamp(72px, 8vw, 110px) var(--gutter);
  border-bottom: var(--border-w) solid var(--line);
  background: var(--soft);
}

.section-head {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 12px;
  margin-bottom: 40px;
}

.eyebrow {
  margin: 0;
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 900;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-family: "Times New Roman", "Georgia", serif;
}

h2 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 6.5rem);
  line-height: 1;
  font-weight: 950;
  font-family: "Times New Roman", "Georgia", serif;
}

.section-decor {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
  text-align: center;
}

.decor-en {
  color: var(--ink);
  font-size: 0.85rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-family: "Times New Roman", "Georgia", serif;
}

.decor-ru {
  color: var(--red);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ═══════════════════════════════════════════════════
   COLLECTIONS — 构成主义网格
   ═══════════════════════════════════════════════════ */

.collection-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: var(--border-w) solid var(--line);
  border-left: var(--border-w) solid var(--line);
}

.collection-tile {
  min-height: 180px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 4px;
  padding: 28px 16px;
  border-right: var(--border-w) solid var(--line);
  border-bottom: var(--border-w) solid var(--line);
  background: var(--bg);
  transition: all 220ms ease;
  position: relative;
  overflow: hidden;
}

.collection-tile::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--ink);
  transform: translateY(100%);
  transition: transform 280ms cubic-bezier(0.22, 0.61, 0.36, 1);
  z-index: 0;
}

.collection-tile:hover::before {
  transform: translateY(0);
}

.collection-tile > * { position: relative; z-index: 1; }

.collection-tile span {
  color: var(--red);
  font-weight: 950;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  font-family: "Times New Roman", "Georgia", serif;
}

.collection-tile strong {
  font-size: clamp(1.1rem, 2vw, 2.2rem);
  line-height: 1.06;
  text-transform: uppercase;
  font-weight: 950;
  font-family: "Times New Roman", "Georgia", serif;
}

.collection-tile em {
  font-style: normal;
  font-size: 0.72rem;
  color: var(--muted);
  font-weight: 600;
  letter-spacing: 0.06em;
}

.collection-tile:hover {
  color: #FFFFFF;
}

.collection-tile:hover em,
.collection-tile:hover span {
  color: rgba(255,255,255,0.6);
}

/* ═══════════════════════════════════════════════════
   FEATURED / CAROUSEL — 档案终端
   ═══════════════════════════════════════════════════ */

.featured {
  background: var(--soft);
  border-bottom: var(--border-w) solid var(--line);
}

.carousel {
  position: relative;
  overflow: hidden;
  background: var(--soft);
  padding: 36px 0;
}

.carousel-track {
  display: flex;
  align-items: center;
  transition: transform 0.55s cubic-bezier(0.25, 0.1, 0.25, 1);
  will-change: transform;
}

.poster-card {
  min-width: 0;
  position: relative;
  background: #FFFFFF;
  border: var(--border-w) solid var(--line);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.4s cubic-bezier(0.25, 0.1, 0.25, 1),
              opacity 0.4s ease,
              box-shadow 0.4s ease;
  transform: scale(0.82);
  opacity: 0.5;
  filter: grayscale(0.15);
}

.poster-card.is-near {
  transform: scale(0.92);
  opacity: 0.75;
  filter: grayscale(0.05);
  z-index: 1;
}

.poster-card.is-center {
  transform: scale(1.04);
  opacity: 1;
  filter: grayscale(0);
  z-index: 2;
  box-shadow: 8px 8px 0 rgba(0,0,0,0.12);
}

.poster-card.is-center:hover {
  transform: scale(1.06);
}

.poster-card img {
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 16;
  object-fit: contain;
  background: #FFFFFF;
  display: block;
  padding: 6px;
}

.carousel-arrow {
  position: absolute;
  top: 50%;
  z-index: 10;
  transform: translateY(-50%);
  width: 44px; height: 44px;
  border-radius: 50%;
  border: var(--border-w) solid var(--line);
  background: #FFFFFF;
  color: var(--ink);
  font-size: 1.1rem;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: all 0.25s ease;
  opacity: 0;
  font-family: "Times New Roman", "Georgia", serif;
}

.carousel:hover .carousel-arrow { opacity: 1; }

.carousel-arrow:hover {
  background: var(--ink);
  color: #FFFFFF;
}

.carousel-prev { left: 14px; }
.carousel-next { right: 14px; }

.carousel-bars {
  display: flex;
  justify-content: center;
  gap: 6px;
  padding: 14px 18px 18px;
  background: var(--soft);
}

.carousel-dot {
  width: 36px; height: 3px;
  border: 0;
  background: rgba(0,0,0,0.15);
  cursor: pointer;
  padding: 0;
  transition: background 0.3s ease, width 0.3s ease;
}

.carousel-dot.is-active {
  background: var(--ink);
  width: 56px;
}

.carousel-dot:hover { background: rgba(0,0,0,0.4); }

.ticker-code {
  padding: 5px 8px;
  background: var(--ink);
  color: #FFFFFF;
  font-size: 0.64rem;
  font-weight: 950;
  width: max-content;
  margin: 6px 0 0 6px;
  font-family: "Times New Roman", "Georgia", serif;
  letter-spacing: 0.08em;
}

.poster-meta {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: center;
  padding: 8px 10px;
  background: #FFFFFF;
  color: var(--ink);
  border-top: var(--border-w) solid var(--line);
}

.poster-meta strong {
  font-weight: 950;
  font-size: 0.74rem;
  font-family: "Times New Roman", "Georgia", serif;
}

.poster-meta span {
  color: var(--red);
  font-size: 0.72rem;
  font-weight: 900;
}

/* ═══════════════════════════════════════════════════
   STUDIO — 地址区
   ═══════════════════════════════════════════════════ */

.studio {
  display: grid;
  grid-template-columns: minmax(260px, 0.45fr) minmax(0, 1fr);
  gap: clamp(32px, 5vw, 68px);
  align-items: center;
}

.studio-copy p {
  color: var(--muted);
  font-size: 1.12rem;
  font-weight: 600;
  font-family: "Times New Roman", "Georgia", "Noto Serif SC", serif;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 26px;
  border: var(--border-w) solid var(--ink);
  font-size: 0.82rem;
  font-weight: 950;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-family: "Times New Roman", "Georgia", serif;
  transition: all 0.25s ease;
}

.button-dark {
  background: var(--ink);
  color: #FFFFFF;
}

.button-dark:hover {
  background: var(--red);
  border-color: var(--red);
  color: #FFFFFF;
}

.map-frame {
  position: relative;
  border: var(--border-w) solid var(--line);
  overflow: hidden;
  background: var(--soft);
}

.map-frame img {
  aspect-ratio: 16 / 9;
  height: auto;
  object-fit: cover;
}

/* ═══════════════════════════════════════════════════
   COOPERATION — 构成主义表单
   ═══════════════════════════════════════════════════ */

.cooperation {
  display: grid;
  grid-template-columns: minmax(240px, 0.42fr) minmax(0, 1fr);
  gap: clamp(32px, 6vw, 80px);
  background: var(--soft);
}

.cooperation p {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.92rem;
}

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

.cooperation-form label {
  display: grid;
  gap: 6px;
  font-weight: 900;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.cooperation-form .full {
  grid-column: 1 / -1;
}

.cooperation-form input,
.cooperation-form select,
.cooperation-form textarea {
  width: 100%;
  min-height: 50px;
  border: var(--border-w) solid var(--line);
  background: #FFFFFF;
  color: var(--ink);
  padding: 0 14px;
  outline: 0;
  font-family: "Times New Roman", "Georgia", "Noto Serif SC", serif;
  transition: border-color 0.2s ease;
}

.cooperation-form textarea {
  min-height: 120px;
  padding-top: 12px;
  resize: vertical;
}

.cooperation-form input:focus,
.cooperation-form select:focus,
.cooperation-form textarea:focus {
  border-color: var(--red);
}

.cooperation-form button {
  grid-column: 1 / -1;
  min-height: 54px;
  border: var(--border-w) solid var(--ink);
  background: var(--ink);
  color: #FFFFFF;
  font-weight: 950;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-family: "Times New Roman", "Georgia", serif;
  font-size: 0.82rem;
  transition: all 0.25s ease;
}

.cooperation-form button:hover {
  background: var(--red);
  border-color: var(--red);
}

/* Form success state */
.form-success {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 52px 24px;
  animation: fadeInUp 0.5s ease;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.success-icon {
  width: 56px; height: 56px;
  background: var(--ink);
  color: #FFFFFF;
  font-size: 1.5rem;
  display: grid;
  place-items: center;
  margin-bottom: 20px;
}

.success-tag {
  display: inline-block;
  padding: 6px 16px;
  border: var(--border-w) solid var(--line);
  color: var(--ink);
  font-size: 0.72rem;
  font-weight: 900;
  margin-bottom: 16px;
  letter-spacing: 0.08em;
}

.success-note {
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.7;
  max-width: 380px;
  margin-bottom: 22px;
}

.success-reset {
  padding: 12px 28px;
  border: var(--border-w) solid var(--line);
  background: #FFFFFF;
  color: var(--ink);
  font-weight: 900;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: all 0.25s ease;
}

.success-reset:hover {
  background: var(--ink);
  color: #FFFFFF;
}

/* ═══════════════════════════════════════════════════
   FOOTER — 黑色基座
   ═══════════════════════════════════════════════════ */

.site-footer {
  padding: 52px var(--gutter) 24px;
  background: var(--dark);
  color: #EBEBEB;
}

.footer-top {
  display: flex;
  gap: 20px;
  align-items: center;
  padding-bottom: 32px;
  border-bottom: var(--border-w) solid rgba(255,255,255,0.12);
}

.footer-top img {
  width: 150px; height: 75px;
  object-fit: contain;
  background: #FFFFFF;
  padding: 6px;
}

.footer-top strong {
  display: block;
  margin-bottom: 4px;
  font-size: 1.3rem;
  font-family: "Times New Roman", "Georgia", serif;
}

.footer-top p {
  margin-bottom: 0;
  color: #9B9B9B;
  font-size: 0.85rem;
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 40px;
  padding: 38px 0;
}

.footer-columns div {
  display: grid;
  align-content: start;
  gap: 10px;
}

.footer-columns h3 {
  margin-bottom: 6px;
  font-size: 0.84rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-family: "Times New Roman", "Georgia", serif;
}

.footer-columns a {
  color: #B0B0B0;
  font-size: 0.84rem;
  transition: color 0.2s ease;
}

.footer-columns a:hover {
  color: #FFFFFF;
}

.social-links {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: flex-start;
}

.social-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: none;
  background: transparent;
  padding: 4px 0;
  transition: all 0.25s ease;
}

.social-link:hover {
  color: var(--red);
}

.social-icon {
  width: 30px;
  height: 30px;
  object-fit: contain;
  flex-shrink: 0;
  opacity: 0.7;
  transition: opacity 0.25s ease;
}

.social-link:hover .social-icon {
  opacity: 1;
}

.social-link em {
  position: static;
  transform: none;
  color: rgba(255,255,255,0.5);
  font-size: 0.7rem;
  font-style: normal;
  white-space: nowrap;
  font-weight: 600;
  letter-spacing: 0.06em;
  transition: color 0.25s ease;
}

.social-link:hover em {
  color: #FFFFFF;
}

.qr-popover {
  position: absolute;
  left: -40px;
  bottom: calc(100% + 12px);
  width: 140px; height: 140px;
  display: none;
  padding: 4px;
  background: #FFFFFF;
  border: var(--border-w) solid var(--line);
  box-shadow: 8px 8px 0 rgba(0,0,0,0.15);
  z-index: 10;
}

.qr-popover img {
  width: 100%; height: 100%;
  object-fit: contain;
}

.social-link:hover .qr-popover,
.social-link:focus-visible .qr-popover {
  display: block;
}

.footer-bottom {
  display: flex;
  justify-content: center;
  align-items: center;
  padding-top: 24px;
  border-top: var(--border-w) solid rgba(255,255,255,0.12);
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-copy {
  color: #8A8A8A;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

.footer-dot {
  color: rgba(255,255,255,0.18);
  font-size: 0.6rem;
}

.footer-bottom span:not(.footer-copy):not(.footer-dot) {
  color: #666666;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

/* ═══════════════════════════════════════════════════
   ICP 备案条 — 构成主义分割线
   ═══════════════════════════════════════════════════ */

.icp-strip {
  padding: 0 var(--gutter);
  background: #000000;
  border-top: var(--border-w) solid rgba(255,255,255,0.06);
}

.icp-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px 16px;
  padding: 18px 0;
  font-family: "Times New Roman", "Georgia", serif;
}

.icp-inner span {
  color: #555555;
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.icp-brand {
  font-weight: 900 !important;
  letter-spacing: 0.14em !important;
  color: #666666 !important;
}

.icp-russian {
  color: #CC0000 !important;
  opacity: 0.4;
}

.icp-sep {
  color: rgba(255,255,255,0.1) !important;
  font-size: 0.5rem !important;
}

.icp-inner a {
  color: #777777;
  text-decoration: none;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  transition: color 0.3s ease;
  font-family: "Times New Roman", "Georgia", serif;
}

.icp-inner a:hover {
  color: #FFFFFF;
}

/* 子页面 ICP 底栏（黑色背景，无 footer 上下文） */
.page-icp-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 22px var(--gutter);
  background: #000000;
  border-top: var(--border-w) solid rgba(255,255,255,0.06);
}

.page-icp-footer::before,
.page-icp-footer::after {
  content: "";
  flex: 1;
  max-width: 120px;
  height: 1px;
  background: rgba(255,255,255,0.1);
}

.page-icp-footer span {
  color: #555555;
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.page-icp-footer a {
  color: #777777;
  text-decoration: none;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  transition: color 0.3s ease;
  font-family: "Times New Roman", "Georgia", serif;
}

.page-icp-footer a:hover {
  color: #FFFFFF;
}

/* ═══════════════════════════════════════════════════
   COLLECTION SUB-PAGE SHARED
   ═══════════════════════════════════════════════════ */

.collection-hero {
  min-height: 38vh;
  display: flex;
  align-items: flex-end;
  padding: 110px var(--gutter) 44px;
  background: #0A0A0A;
  position: relative;
  overflow: hidden;
  border-bottom: var(--border-w) solid var(--line);
}

.collection-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      45deg,
      transparent,
      transparent 8px,
      rgba(255,255,255,0.012) 8px,
      rgba(255,255,255,0.012) 9px
    );
  pointer-events: none;
  z-index: 1;
}

.collection-hero::after {
  content: "";
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 60%;
  background: linear-gradient(0deg, rgba(0,0,0,0.7) 0%, transparent 100%);
  pointer-events: none;
  z-index: 0;
}

.collection-hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.collection-hero h1 {
  color: #FFFFFF;
  font-size: clamp(2.6rem, 5.5vw, 4.5rem);
  line-height: 1.03;
  font-weight: 950;
  margin: 0 0 10px;
  font-family: "Times New Roman", "Georgia", serif;
}

.collection-hero .sub {
  color: rgba(255,255,255,0.38);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.collection-back {
  padding: 14px var(--gutter);
  border-bottom: var(--border-w) solid var(--line);
  background: var(--soft);
}

.collection-back a {
  color: var(--ink);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.7rem;
  font-family: "Times New Roman", "Georgia", serif;
  transition: color 0.2s ease;
}

.collection-back a:hover { color: var(--red); }

/* Archive Grid */
.archive-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  padding: clamp(28px, 4vw, 56px) var(--gutter);
}

.archive-card {
  background: #FFFFFF;
  border: var(--border-w) solid var(--line);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  display: flex;
  flex-direction: column;
}

.archive-card:hover {
  transform: translateY(-4px);
  box-shadow: 6px 6px 0 rgba(0,0,0,0.12);
}

.archive-card img {
  width: 100%;
  aspect-ratio: 9/16;
  object-fit: cover;
  display: block;
  border-bottom: var(--border-w) solid var(--line);
}

.archive-card-body {
  padding: 14px 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.archive-card-body h4 {
  font-size: 0.82rem;
  font-weight: 950;
  margin: 0 0 4px;
  text-transform: uppercase;
  font-family: "Times New Roman", "Georgia", serif;
}

.archive-card-body .year {
  display: inline-block;
  font-size: 0.64rem;
  color: var(--red);
  font-weight: 900;
  margin-bottom: 4px;
  letter-spacing: 0.08em;
}

.archive-card-body p {
  font-size: 0.76rem;
  color: var(--muted);
  line-height: 1.55;
  margin: 0 0 8px;
  flex: 1;
}

/* Card tags for Cold War collection */
.card-tags {
  margin-top: 6px;
  font-size: 0.56rem;
  color: var(--red);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0.02em;
  font-family: "Times New Roman", "Georgia", "Noto Serif SC", serif;
  word-break: break-word;
  opacity: 0.7;
}

/* Download button on cards */
.dl-btn {
  display: block;
  width: 100%;
  padding: 10px 0;
  border: var(--border-w) solid var(--line);
  background: #FFFFFF;
  color: var(--ink);
  font-weight: 950;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  cursor: pointer;
  font-family: "Times New Roman", "Georgia", serif;
  transition: all 0.25s ease;
  margin-top: auto;
}

.dl-btn:hover {
  background: var(--ink);
  color: #FFFFFF;
}

.dl-btn .dl-arrow {
  display: inline-block;
  margin-left: 4px;
  transition: transform 0.25s ease;
}

.dl-btn:hover .dl-arrow { transform: translateX(3px); }

/* ═══════════════════════════════════════════════════
   DOWNLOAD / PRICING MODAL — 档案调取终端
   ═══════════════════════════════════════════════════ */

.dl-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 300;
  background: rgba(0,0,0,0.78);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.dl-modal.is-open { display: flex; }

.dl-modal-content {
  background: #FFFFFF;
  max-width: 480px;
  width: 100%;
  position: relative;
  border: var(--border-w) solid var(--line);
  box-shadow: 12px 12px 0 rgba(0,0,0,0.2);
  max-height: 92vh;
  overflow-y: auto;
}

/* Modal header — terminal style */
.dl-modal-header {
  background: var(--ink);
  color: #FFFFFF;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: var(--border-w) solid var(--line);
}

.dl-modal-header h3 {
  margin: 0;
  font-size: 0.8rem;
  font-weight: 950;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-family: "Times New Roman", "Georgia", serif;
}

.dl-modal-close {
  background: none;
  border: var(--border-w) solid rgba(255,255,255,0.3);
  color: #FFFFFF;
  width: 28px; height: 28px;
  font-size: 1rem;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: all 0.2s ease;
}

.dl-modal-close:hover {
  background: var(--red);
  border-color: var(--red);
}

/* Modal body */
.dl-modal-body {
  padding: 24px 20px;
}

/* Preview strip */
.dl-preview {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: var(--border-w) solid var(--line);
}

.dl-preview-thumb {
  width: 80px;
  flex-shrink: 0;
  aspect-ratio: 9/16;
  object-fit: cover;
  border: var(--border-w) solid var(--line);
}

.dl-preview-info h4 {
  margin: 0 0 4px;
  font-size: 0.9rem;
  font-weight: 950;
  text-transform: uppercase;
  font-family: "Times New Roman", "Georgia", serif;
}

.dl-preview-info .code {
  font-size: 0.62rem;
  color: var(--red);
  font-weight: 900;
  letter-spacing: 0.1em;
}

.dl-preview-info .dim {
  font-size: 0.7rem;
  color: var(--muted);
  margin-top: 4px;
}

/* Price display — the core constructivist element */
.price-display {
  text-align: center;
  padding: 22px 16px;
  margin-bottom: 20px;
  background: var(--soft);
  border: var(--border-w) solid var(--line);
  position: relative;
}

.price-display::before {
  content: "АРХИВ · ТЕРМИНАЛ";
  position: absolute;
  top: -9px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink);
  color: #FFFFFF;
  padding: 2px 14px;
  font-size: 0.54rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  white-space: nowrap;
}

.price-label {
  font-size: 0.64rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  margin-bottom: 8px;
}

.price-amount {
  font-size: 3.2rem;
  font-weight: 950;
  line-height: 1;
  font-family: "Times New Roman", "Georgia", serif;
  color: var(--ink);
}

.price-amount .yen {
  font-size: 1.6rem;
  vertical-align: super;
  margin-right: 2px;
}

/* Price breakdown — dossier style */
.price-breakdown {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0;
  margin-bottom: 20px;
  border: var(--border-w) solid var(--line);
}

.breakdown-item {
  padding: 12px 10px;
  text-align: center;
  border-right: 1px solid var(--line);
  background: #FFFFFF;
}

.breakdown-item:last-child { border-right: 0; }

.breakdown-item .bd-val {
  font-size: 1.1rem;
  font-weight: 950;
  font-family: "Times New Roman", "Georgia", serif;
  display: block;
}

.breakdown-item .bd-label {
  font-size: 0.56rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-top: 2px;
}

/* Stats row */
.dl-stats {
  display: flex;
  justify-content: center;
  gap: 28px;
  margin-bottom: 22px;
  font-size: 0.66rem;
  color: var(--muted);
  font-weight: 700;
  letter-spacing: 0.06em;
}

.dl-stats span {
  color: var(--ink);
  font-weight: 950;
}

/* Payment methods — toggle tabs */
.dl-payment-methods {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-bottom: 18px;
  border: var(--border-w) solid var(--line);
}

.dl-pay-tab {
  padding: 14px;
  text-align: center;
  cursor: pointer;
  background: #FFFFFF;
  font-weight: 950;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border: 0;
  transition: all 0.2s ease;
  font-family: "Times New Roman", "Georgia", serif;
}

.dl-pay-tab:first-child { border-right: 1px solid var(--line); }

.dl-pay-tab.is-selected,
.dl-pay-tab:hover {
  background: var(--ink);
  color: #FFFFFF;
}

/* QR display */
.dl-qr {
  display: none;
  text-align: center;
  padding: 16px 0;
}

.dl-qr.is-active { display: block; }

.dl-qr img {
  width: 160px; height: 160px;
  object-fit: contain;
  margin: 0 auto 10px;
  border: var(--border-w) solid var(--line);
  padding: 4px;
  background: #FFFFFF;
}

.dl-qr p {
  font-size: 0.7rem;
  color: var(--muted);
  font-weight: 700;
  margin: 0;
}

/* Confirm button — red accent */
.dl-confirm {
  display: block;
  width: 100%;
  padding: 15px;
  background: var(--ink);
  color: #FFFFFF;
  border: var(--border-w) solid var(--ink);
  font-weight: 950;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  cursor: pointer;
  font-family: "Times New Roman", "Georgia", serif;
  transition: all 0.25s ease;
}

.dl-confirm:hover {
  background: var(--red);
  border-color: var(--red);
}

.dl-confirm:disabled {
  background: #CCC;
  border-color: #CCC;
  color: #888;
  cursor: not-allowed;
}

/* Success animation inside modal */
.dl-success {
  display: none;
  text-align: center;
  padding: 30px 20px;
}

.dl-success.is-active { display: block; }

.dl-success .check {
  font-size: 2.8rem;
  margin-bottom: 12px;
  display: block;
}

.dl-success h4 {
  font-size: 1.1rem;
  font-weight: 950;
  margin: 0 0 8px;
  font-family: "Times New Roman", "Georgia", serif;
}

.dl-success p {
  color: var(--muted);
  font-size: 0.82rem;
  margin: 0;
}

/* ═══════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════ */

@media (max-width: 1180px) {
  .primary-nav { gap: 14px; font-size: 0.58rem; }
  .carousel-arrow { opacity: 1; }
}

@media (max-width: 880px) {
  .site-header {
    flex-wrap: wrap;
    padding: 8px 18px;
  }

  .primary-nav {
    flex-wrap: wrap;
    gap: 10px;
    font-size: 0.56rem;
    overflow-x: auto;
  }

  .studio,
  .cooperation,
  .section-head {
    grid-template-columns: 1fr;
  }

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

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

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

  .carousel-arrow { width: 36px; height: 36px; }

  .price-breakdown { grid-template-columns: 1fr 1fr 1fr; }
}

@media (max-width: 560px) {
  .hero,
  .collections,
  .featured,
  .studio,
  .cooperation,
  .site-footer {
    padding-inline: 14px;
  }

  h1 { font-size: clamp(2.6rem, 14vw, 4rem); }

  .hero-actions,
  .cooperation-form,
  .footer-bottom-inner { gap: 8px; }

  .icp-inner { flex-direction: column; gap: 6px; padding: 16px 0; }
  .icp-sep { display: none; }

  .collection-board,
  .footer-columns { grid-template-columns: 1fr; }

  .dl-preview { flex-direction: column; align-items: center; text-align: cent