/* ========== Project Intro Page — Killian Herzer 风「TOP SECRET // DECRYPTED」案件档案 ========== */
.p-intro {
  padding: 80px 60px 100px;
  position: relative;
  z-index: 1;
}

/* ===== 项目背景图（80% 暗化遮罩透出） ===== */
.p-intro__bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  background-size: cover;
  background-position: center;
  filter: grayscale(0.4) brightness(0.55);
  pointer-events: none;
  display: none;   /* 仅当 R2 key 存在时由 JS 显示 */
}
.p-intro__bg.is-on { display: block; }
.p-intro__bg::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg,
    rgba(10,10,10,0.85) 0%,
    rgba(10,10,10,0.78) 30%,
    rgba(10,10,10,0.72) 60%,
    rgba(10,10,10,0.86) 100%);
  backdrop-filter: blur(0.4px);
  -webkit-backdrop-filter: blur(0.4px);
}
.p-intro__bg.is-on ~ * .p-intro__sidebar,
body[data-page="project-intro"] .p-intro__bg.is-on ~ main .p-intro__sidebar {
  background: rgba(15, 15, 15, 0.92);
}

/* ===== 入场 / 退出动画 ===== */
@keyframes pIntroFadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}
.p-intro__close,
.p-intro__evidence,
.p-intro__sidebar,
.p-intro__main,
.p-intro__evidence-log,
.p-intro__more {
  animation: pIntroFadeUp .36s cubic-bezier(.2,.8,.25,1) both;
}
.p-intro__close          { animation-delay: .02s; }
.p-intro__evidence       { animation-delay: .06s; }
.p-intro__sidebar        { animation-delay: .1s;  }
.p-intro__main           { animation-delay: .14s; }
.p-intro__main .psec     { animation: pIntroFadeUp .32s cubic-bezier(.2,.8,.25,1) both; }
.p-intro__main .psec:nth-child(1) { animation-delay: .16s; }
.p-intro__main .psec:nth-child(2) { animation-delay: .19s; }
.p-intro__main .psec:nth-child(3) { animation-delay: .22s; }
.p-intro__main .psec:nth-child(4) { animation-delay: .25s; }
.p-intro__main .psec:nth-child(5) { animation-delay: .28s; }
.p-intro__main .psec:nth-child(n+6) { animation-delay: .31s; }
.p-intro__evidence-log   { animation-delay: .28s; }
.p-intro__more           { animation-delay: .32s; }
body.is-leaving .p-intro > * {
  transition: opacity .26s cubic-bezier(.4,.1,.25,1), transform .3s cubic-bezier(.4,.1,.25,1);
  opacity: 0;
  transform: translateY(8px);
}

/* ===== 顶部 CLOSE TERMINAL 按钮（居中，类似参考站） ===== */
.p-intro__close {
  position: absolute;
  top: 28px; left: 50%;
  transform: translateX(-50%);
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-strong);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.28em;
  color: var(--text);
  text-transform: uppercase;
  z-index: 5;
  transition: all .25s;
  cursor: pointer;
}
.p-intro__close::before {
  content: '×';
  font-size: 14px;
  letter-spacing: 0;
  color: var(--accent);
}
.p-intro__close:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.p-intro__close:hover::before { color: #fff; }

/* ===== EVIDENCE 头条：横线 + 左红字 + 右白底黑字按钮 ===== */
.p-intro__evidence {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 24px;
  margin: 60px 0 4px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--accent-line);
}
.p-intro__evidence-left {
  font-family: var(--font-mono);
  letter-spacing: 0.28em;
}
.p-intro__evidence-no {
  font-size: 12px;
  color: var(--accent);
  text-transform: uppercase;
  font-weight: 500;
}
.p-intro__category {
  display: inline-flex; align-items: center;
  padding: 7px 16px;
  background: #fff;
  color: #000;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  font-weight: 500;
}

/* ===== 主体布局：左 sidebar + 右 main ===== */
.p-intro__layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 50px;
  margin-top: 36px;
  align-items: flex-start;
}

.p-intro__sidebar {
  position: sticky;
  top: 30px;
  background: rgba(20, 20, 20, 0.85);
  border: 1px solid var(--border);
  padding: 28px 26px;
  font-family: var(--font-mono);
}
.p-intro__sidebar-head {
  font-size: 10px;
  letter-spacing: 0.32em;
  color: var(--accent);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--accent-line);
  margin-bottom: 22px;
  text-transform: uppercase;
}
.p-intro__meta-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}
.p-intro__meta-list > div {
  display: grid;
  grid-template-columns: 90px 1fr;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  align-items: center;
}
.p-intro__meta-list > div:last-child { border-bottom: none; }
.p-intro__meta-list dt {
  color: var(--text-faint);
  letter-spacing: 0.22em;
  font-size: 9px;
  text-transform: uppercase;
}
.p-intro__meta-list dd {
  color: var(--text);
  letter-spacing: 0.06em;
  font-weight: 500;
}

.p-intro__sidebar-section {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}
.p-intro__sidebar-lab {
  font-size: 9px;
  letter-spacing: 0.28em;
  color: var(--text-faint);
  margin-bottom: 12px;
  text-transform: uppercase;
}
.p-intro__sidebar-tags {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}
.p-intro__sidebar-tags span {
  border: 1px solid var(--border-strong);
  padding: 9px 4px;
  text-align: center;
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--text);
  transition: all .22s;
}
.p-intro__sidebar-tags span:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

/* ACCESS SITE 大按钮 */
.p-intro__access {
  display: flex;
  width: 100%;
  margin-top: 22px;
  padding: 16px 18px;
  background: #fff;
  color: #000;
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  align-items: center;
  justify-content: center;
  transition: background .25s, color .25s;
}
.p-intro__access:hover { background: var(--accent); color: #fff; }

/* 进入沉浸模式 CTA（透明 + 红字框） */
.p-intro__cta {
  display: inline-flex; align-items: center; gap: 14px;
  width: 100%;
  margin-top: 12px;
  padding: 13px 18px;
  border: 1.5px solid var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  justify-content: space-between;
  transition: all .3s;
}
.p-intro__cta:hover { background: var(--accent); color: #fff; }
.p-intro__cta .arr { transition: transform .35s; }
.p-intro__cta:hover .arr { transform: translateX(6px); }

/* ===== 右侧 main：blocks 容器 ===== */
.p-intro__main {
  min-height: 100vh;
}
.p-intro__blocks {
  display: flex;
  flex-direction: column;
  gap: 50px;
}

/* ===== 模块 section（统一样式） ===== */
.p-intro__main .psec {
  position: relative;
}
/* 标题 — 红色 ">> " 前缀 */
.p-intro__main .psec h2,
.p-intro__main .psec h3,
.p-intro__main .psec__caption h3 {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.26em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 14px;
  font-weight: 500;
}
.p-intro__main .psec h2::before,
.p-intro__main .psec h3::before,
.p-intro__main .psec__caption h3::before {
  content: '>> ';
  color: var(--accent);
  margin-right: 4px;
}
/* 文字 block 正文 */
.p-intro__main .psec--text-v2 {
  max-width: 760px;
}
.p-intro__main .psec--text-v2 h2 {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.005em;
  color: var(--text);
  text-transform: none;
}
.p-intro__main .psec--text-v2 h2::before {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.26em;
  color: var(--accent);
  display: block;
  margin-bottom: 6px;
}
.p-intro__main .psec--text-v2 .text-body p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--text);
  margin-bottom: 14px;
  max-width: 720px;
}
.p-intro__main .psec--text-v2 .text-body p:last-child { margin-bottom: 0; }

/* 图片 block — 红色 L 角框 */
.p-intro__main .psec--single-img {
  position: relative;
  margin: 0;
}
.p-intro__main .psec--single-img img {
  width: 100%;
  height: auto;
  display: block;
}
.p-intro__main .psec--single-img::before,
.p-intro__main .psec--single-img > .corner-br {
  content: '';
  position: absolute;
  width: 22px; height: 22px;
  border: 1.5px solid var(--accent);
  pointer-events: none;
  z-index: 2;
}
.p-intro__main .psec--single-img::before { top: -1px; left: -1px; border-right: none; border-bottom: none; }
.p-intro__main .psec--single-img .corner-br { bottom: -1px; right: -1px; border-left: none; border-top: none; }

/* gallery — 多图垂直堆叠，每张红角框 */
.p-intro__main .psec--gallery {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.p-intro__main .psec--gallery > * {
  position: relative;
}
.p-intro__main .psec--gallery img {
  width: 100%;
  height: auto;
  display: block;
}

/* link block — icon + 标题 + URL 列表 */
.p-intro__main .psec--link {
  font-family: var(--font-mono);
}
.p-intro__main .psec--link .link-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.p-intro__main .psec--link .link-row {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  font-size: 12px;
  letter-spacing: 0.04em;
  transition: background .25s, color .25s, border-color .25s;
}
.p-intro__main .psec--link .link-row:hover {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: var(--accent-line);
}
.p-intro__main .psec--link .link-row .link-ic {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px; height: 22px;
  border: 1px solid var(--accent-line);
  color: var(--accent);
  font-size: 11px;
}
.p-intro__main .psec--link .link-row .link-title {
  font-family: var(--font-sans);
  font-weight: 500;
}
.p-intro__main .psec--link .link-row .link-url {
  margin-left: auto;
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

/* ===== ADDITIONAL_EVIDENCE_LOG 缩略图网格 ===== */
.p-intro__evidence-log {
  margin-top: 80px;
  padding-top: 50px;
  border-top: 1px solid var(--accent-line);
}
.p-intro__evidence-log-head {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--accent);
  margin-bottom: 26px;
  text-transform: uppercase;
}
.p-intro__evidence-log-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.evidence-cell {
  position: relative;
  aspect-ratio: 4/3;
  background: #161616;
  border: 1px solid var(--border);
  overflow: hidden;
  cursor: pointer;
  transition: border-color .25s, transform .35s;
}
.evidence-cell::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(0,0,0,0.6) 100%);
  pointer-events: none;
}
.evidence-cell .evidence-cell__img {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
  transition: transform .55s, filter .35s;
}
.evidence-cell:hover { border-color: var(--accent); }
.evidence-cell:hover .evidence-cell__img { transform: scale(1.05); }
.evidence-cell .evidence-cell__no {
  position: absolute;
  top: 10px; left: 10px;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.22em;
  color: var(--accent);
  background: rgba(0,0,0,0.7);
  border: 1px solid var(--accent-line);
  padding: 3px 7px;
  z-index: 2;
  text-transform: uppercase;
}

/* ===== OTHER PROJECTS（每张图 = 该项目封面） ===== */
.p-intro__more {
  margin-top: 90px;
  padding-top: 50px;
  border-top: 1px solid var(--border);
}
.p-intro__more-head {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--accent);
  margin-bottom: 26px;
  text-transform: uppercase;
}
.p-intro__more-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.more-item {
  position: relative;
  aspect-ratio: 16/10;
  background: #161616;
  border: 1px solid var(--border);
  overflow: hidden;
  cursor: pointer;
  transition: border-color .3s;
}
.more-item:hover { border-color: var(--accent); }
.more-item__img {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
  filter: grayscale(0.6) brightness(0.7);
  transition: filter .5s, transform .8s;
}
.more-item:hover .more-item__img { filter: grayscale(0.1) brightness(0.95); transform: scale(1.05); }
.more-item__index {
  position: absolute;
  top: 14px; left: 16px;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.22em;
  color: #fff;
  background: var(--accent);
  padding: 3px 8px;
  z-index: 2;
}
.more-item__title {
  position: absolute;
  bottom: 14px; left: 16px;
  font-family: var(--font-serif);
  font-size: 22px;
  color: #fff;
  z-index: 2;
}
.more-item__cat {
  position: absolute;
  bottom: 16px; right: 16px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--text-dim);
  z-index: 2;
}
.more-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 35%, rgba(0,0,0,0.85) 100%);
  pointer-events: none;
}

/* ===== Responsive ===== */
@media (max-width: 1100px) {
  .p-intro__layout { grid-template-columns: 1fr; gap: 30px; }
  .p-intro__sidebar { position: static; }
  .p-intro__evidence-log-grid { grid-template-columns: repeat(3, 1fr); }
  .p-intro__more-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .p-intro { padding: 70px 18px 60px; }
  .p-intro__close { font-size: 9px; padding: 6px 12px; }
  .p-intro__evidence { grid-template-columns: 1fr; gap: 12px; }
  .p-intro__showcase { justify-self: start; }
  .p-intro__evidence-log-grid { grid-template-columns: repeat(2, 1fr); }
  .p-intro__more-grid { grid-template-columns: 1fr; }
}