/* 第7套：暖纸案卷。左侧锈线、水平轨道、现象大卡，和圆环工作室/对照台账不是同一骨架。 */
:root {
  --paper: #fff7ed;
  --rust: #c2410c;
  --rust-deep: #7c2d12;
  --brown: #431407;
  --card: #fffbeb;
  --muted: #7c2d12;
  --line: #fed7aa;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: auto;
}

body.dossier-body {
  margin: 0;
  background:
    repeating-linear-gradient(
      0deg,
      rgba(194, 65, 12, 0.03) 0 1px,
      transparent 1px 28px
    ),
    var(--paper);
  color: var(--brown);
  font-family: "Palatino Linotype", "Songti SC", "STSong", serif;
  line-height: 1.78;
}

a {
  color: var(--rust);
}

.mast {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 0.8rem;
  padding: 1.1rem 5vw 0.9rem;
  border-bottom: 3px double var(--rust);
}

.site-name {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--brown);
  font-weight: 800;
  font-size: 1.15rem;
}

.site-name svg {
  width: 26px;
  height: 26px;
  color: var(--rust);
}

.anchor-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.85rem;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 0.88rem;
}

.anchor-list a {
  text-decoration: none;
  color: var(--rust-deep);
}

.lead-block {
  padding: 1.4rem 5vw 0.4rem;
  max-width: 880px;
}

.lead-block h1 {
  margin: 0 0 0.7rem;
  font-size: clamp(1.55rem, 3vw, 2.1rem);
}

.lead-block p {
  margin: 0 0 0.65rem;
  color: var(--muted);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.phenom-intro {
  padding: 0.2rem 5vw 0.3rem;
  max-width: 880px;
}

.phenom-intro h2 {
  margin: 0 0 0.65rem;
  font-size: 1.32rem;
}

.phenom-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
  padding: 0.6rem 5vw 1.4rem;
}

.phenom-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-top: 10px solid var(--rust);
  padding: 1rem 1rem 1.1rem;
  min-height: 12rem;
}

.phenom-card svg {
  width: 40px;
  height: 40px;
  color: var(--rust);
}

.phenom-card h3 {
  margin: 0.5rem 0 0.4rem;
  font-size: 1.15rem;
}

.phenom-card p {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--muted);
}

.why-block,
.order-block,
.trap-block,
.engine-block,
.recheck-block,
.limit-block,
.faq-block {
  padding: 1.2rem 5vw 1.7rem;
  border-left: 8px solid var(--rust);
  margin: 0 5vw 0.8rem 5vw;
  background: rgba(255, 251, 235, 0.72);
}

.why-block h2,
.order-block h2,
.trap-block h2,
.engine-block h2,
.recheck-block h2,
.limit-block h2,
.faq-block h2 {
  margin: 0 0 0.65rem;
  font-size: 1.32rem;
}

.note {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--muted);
  margin: 0 0 0.9rem;
}

.why-table,
.engine-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 0.94rem;
}

.why-table th,
.why-table td,
.engine-table th,
.engine-table td {
  border: 1px solid var(--line);
  padding: 0.65rem 0.7rem;
  vertical-align: top;
  text-align: left;
}

.why-table thead th,
.engine-table thead th {
  background: var(--rust);
  color: #fff7ed;
}

.order-line {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.order-node {
  flex: 1 1 140px;
  background: #fff;
  border: 1px solid var(--line);
  padding: 0.8rem;
  position: relative;
}

.order-node + .order-node {
  border-left: 0;
}

.order-node::after {
  content: "";
  position: absolute;
  right: -8px;
  top: 50%;
  width: 0;
  height: 0;
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
  border-left: 8px solid var(--rust);
  z-index: 1;
}

.order-node:last-child::after {
  display: none;
}

.order-node strong {
  display: block;
  color: var(--rust-deep);
  margin-bottom: 0.3rem;
}

.order-node p {
  margin: 0;
  color: var(--muted);
}

.trap-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
}

.trap-card,
.recheck-card,
.limit-col {
  background: #fff;
  border: 1px solid var(--line);
  padding: 0.85rem 0.9rem;
}

.trap-card svg,
.recheck-card svg {
  width: 32px;
  height: 32px;
  color: var(--rust);
}

.trap-card h3,
.recheck-card h3,
.limit-col h3 {
  margin: 0.4rem 0;
  font-size: 1.02rem;
}

.trap-card p,
.recheck-card p,
.limit-col p {
  margin: 0 0 0.45rem;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--muted);
}

.recheck-stack {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.75rem;
}

.limit-duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
}

.faq-fold details {
  background: #fff;
  border: 1px solid var(--line);
  margin-bottom: 0.55rem;
  padding: 0.5rem 0.8rem;
}

.faq-fold summary {
  cursor: pointer;
  font-weight: 700;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.faq-fold p {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--muted);
  margin: 0.5rem 0 0.3rem;
}

.foot-dossier {
  background: var(--brown);
  color: #fed7aa;
  padding: 1.4rem 5vw 1.6rem;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 0.92rem;
}

.foot-dossier p {
  margin: 0 0 0.45rem;
  max-width: 48rem;
}

.foot-dossier p:last-child {
  margin-top: 0.8rem;
  color: #fdba74;
}

@media (max-width: 900px) {
  .phenom-row,
  .trap-grid,
  .recheck-stack,
  .limit-duo {
    grid-template-columns: 1fr;
  }

  .why-block,
  .order-block,
  .trap-block,
  .engine-block,
  .recheck-block,
  .limit-block,
  .faq-block {
    margin-left: 0;
    margin-right: 0;
  }

  .order-node::after {
    display: none;
  }
}