/* www · 图书馆索书单 / Library call slip · 卡片目录柜 */
:root {
  --forest-0: #13241a;
  --forest-1: #1a3022;
  --forest-2: #23402c;
  --forest-3: #2c4d36;
  --desk: #183024;
  --brass: #b8954a;
  --brass-2: #d4b56a;
  --brass-dim: #8a6e32;
  --cream: #f4ecd6;
  --cream-2: #efe3c6;
  --slip: #f7f1df;
  --ink: #2a2416;
  --muted: #5d5646;
  --rule: #d8cba8;
  --rail: #1c3826;
  --rail-ink: #f3e8c8;
  --stamp: #6e3f28;
  --shadow: rgba(16, 28, 20, 0.28);
  --title: Georgia, "Times New Roman", serif;
  --body: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
}

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

html {
  scroll-behavior: auto;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  background-color: var(--forest-0);
  background-image:
    linear-gradient(180deg, rgba(19, 36, 26, 0.88), rgba(26, 48, 34, 0.94)),
    repeating-linear-gradient(
      90deg,
      #1a3022 0 38px,
      #163028 38px 40px,
      #214232 40px 78px,
      #193424 78px 80px,
      #2a4a36 80px 116px,
      #173226 116px 118px
    );
  color: var(--cream);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.88;
}

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

a {
  color: var(--brass-2);
  text-underline-offset: 3px;
}

p {
  margin: 0 0 1em;
}

p:last-child {
  margin-bottom: 0;
}

h1,
h2,
h3,
.brand-name {
  font-family: var(--title);
  line-height: 1.35;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 0.65em;
}

h1 {
  font-size: 1.78rem;
}

h2 {
  font-size: 1.3rem;
}

h3 {
  font-size: 1.06rem;
  color: var(--stamp);
}

ul,
ol {
  margin: 0 0 1em;
  padding-left: 1.25em;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  background: #fffdf6;
}

th,
td {
  border: 1px solid var(--rule);
  padding: 0.65em 0.75em;
  text-align: left;
  vertical-align: top;
}

th {
  background: #e8dcb8;
  color: var(--ink);
  font-family: var(--title);
  font-weight: 700;
}

.table-scroll {
  overflow-x: auto;
  margin: 0 0 1em;
}

.skip {
  position: absolute;
  left: 12px;
  top: -48px;
  z-index: 40;
  background: var(--brass);
  color: var(--ink);
  padding: 8px 12px;
  font-weight: 700;
}

.skip:focus {
  top: 12px;
}

.wrap {
  width: min(1100px, calc(100% - 28px));
  margin: 0 auto;
}

/* —— 出纳台顶栏 —— */
.desk {
  background:
    linear-gradient(180deg, #214232 0%, var(--desk) 42%, #14281c 100%);
  border-bottom: 6px solid var(--brass-dim);
  box-shadow: 0 8px 0 rgba(184, 149, 74, 0.18);
}

.desk-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0 10px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--cream);
  text-decoration: none;
}

.brand:hover {
  color: var(--brass-2);
}

.brand svg {
  width: 38px;
  height: 38px;
  color: var(--brass-2);
  flex-shrink: 0;
}

.brand-name {
  margin: 0;
  color: var(--cream);
  font-size: 1.22rem;
  letter-spacing: 0.03em;
}

.desk-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--cream-2);
  font-size: 0.8rem;
}

.plaque {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--brass);
  background: rgba(184, 149, 74, 0.12);
  color: var(--brass-2);
  padding: 4px 10px;
  letter-spacing: 0.06em;
}

.plaque b {
  font-weight: 700;
}

.nav-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  padding: 0 0 12px;
}

.nav-list {
  display: flex;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.nav-list a {
  display: inline-block;
  text-decoration: none;
  color: var(--cream-2);
  border: 1px solid rgba(216, 203, 168, 0.28);
  border-bottom: 0;
  padding: 9px 18px 10px;
  font-size: 0.95rem;
  background: rgba(20, 40, 28, 0.45);
  margin-right: 6px;
}

.nav-list a:hover {
  color: var(--brass-2);
  background: rgba(184, 149, 74, 0.14);
}

.nav-list a[aria-current="page"],
.nav-list a.is-current {
  color: var(--ink);
  background: var(--cream);
  border-color: var(--cream);
  font-weight: 700;
}

.nav-meta {
  margin: 0 0 8px;
  color: var(--brass-2);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
}

main {
  padding: 28px 0 52px;
  overflow: visible;
}

/* —— 索书卡 —— */
.slip {
  display: grid;
  grid-template-columns: 86px 1fr;
  background: var(--slip);
  color: var(--ink);
  margin-bottom: 22px;
  box-shadow:
    3px 3px 0 var(--shadow),
    0 0 0 1px #e4d7b4;
}

.slip-rail {
  background:
    repeating-linear-gradient(
      180deg,
      var(--rail) 0 18px,
      #173224 18px 19px
    );
  color: var(--rail-ink);
  padding: 16px 8px 18px;
  text-align: center;
  position: relative;
}

.slip-rail::before {
  content: "";
  display: block;
  width: 18px;
  height: 18px;
  margin: 0 auto 12px;
  border: 2px solid var(--brass);
  border-radius: 50%;
  background: radial-gradient(circle at 40% 40%, #f4ecd6 0 35%, transparent 36%);
  box-shadow: inset 0 0 0 3px var(--rail);
}

.rail-label,
.rail-no,
.rail-loc {
  display: block;
}

.rail-label {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--brass-2);
}

.rail-no {
  font-family: var(--title);
  font-size: 1.15rem;
  margin: 8px 0;
  line-height: 1.2;
}

.rail-loc {
  font-size: 0.72rem;
  writing-mode: horizontal-tb;
  color: #d8cba8;
}

.slip-sheet {
  background-image: repeating-linear-gradient(
    180deg,
    transparent 0 31px,
    rgba(216, 203, 168, 0.45) 31px 32px
  );
  background-color: var(--slip);
  min-width: 0;
}

.slip-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px 8px;
  border-bottom: 1px dashed var(--rule);
}

.slip-head h1,
.slip-head h2 {
  margin: 0;
  flex: 1;
}

.stamp {
  flex-shrink: 0;
  border: 2px solid var(--stamp);
  color: var(--stamp);
  font-family: var(--title);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  padding: 5px 8px;
  transform: rotate(-6deg);
}

.slip-body {
  padding: 16px 18px 20px;
}

.kicker {
  margin: 0 0 8px;
  color: var(--stamp);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
}

.lead {
  font-size: 1.02rem;
}

.note-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  color: var(--muted);
  font-size: 0.82rem;
  margin-bottom: 12px;
}

.grid-2,
.grid-4,
.receipt-grid {
  display: grid;
  gap: 12px;
  margin: 0 0 1em;
}

.grid-2 {
  grid-template-columns: 1fr 1fr;
}

.grid-4,
.receipt-grid {
  grid-template-columns: 1fr 1fr;
}

.card {
  background: #fffdf6;
  border: 1px solid var(--rule);
  box-shadow: inset 4px 0 0 var(--forest-3);
  padding: 12px 14px 14px;
}

.card h3 {
  margin-bottom: 0.4em;
}

.card p {
  color: var(--muted);
  font-size: 0.95rem;
}

.receipt {
  background: #fffdf6;
  border: 1px solid var(--rule);
  padding: 12px 14px 14px;
}

.receipt-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  color: var(--stamp);
  font-size: 0.8rem;
  margin-bottom: 8px;
}

.receipt h3 {
  font-size: 1rem;
}

.kpi-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin: 0 0 1em;
}

.kpi {
  background: #fffdf6;
  border: 1px solid var(--rule);
  padding: 12px;
  text-align: center;
}

.kpi .num {
  font-family: var(--title);
  font-size: 1.7rem;
  color: var(--forest-2);
  line-height: 1.15;
}

.kpi .label {
  color: var(--muted);
  font-size: 0.82rem;
  margin-top: 6px;
}

.kpi .note {
  color: var(--brass-dim);
  font-size: 0.75rem;
  margin-top: 4px;
}

.steps {
  margin: 0 0 1em;
  padding: 0;
  list-style: none;
  counter-reset: slip-step;
}

.steps li {
  position: relative;
  padding: 10px 12px 12px 48px;
  border: 1px solid var(--rule);
  background: #fffdf6;
  margin-bottom: 10px;
}

.steps li::before {
  counter-increment: slip-step;
  content: counter(slip-step);
  position: absolute;
  left: 10px;
  top: 12px;
  width: 28px;
  height: 28px;
  border: 1px solid var(--brass);
  color: var(--forest-2);
  font-family: var(--title);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--cream-2);
}

.check-list {
  margin: 0 0 1em;
  padding: 0;
  list-style: none;
}

.check-list li {
  padding: 8px 0 8px 28px;
  position: relative;
  border-bottom: 1px dashed var(--rule);
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 14px;
  height: 14px;
  border: 1.5px solid var(--forest-3);
  background: #fffdf6;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 16px;
  background: var(--forest-2);
  color: var(--cream);
  text-decoration: none;
  font-weight: 700;
  border: 1px solid var(--brass);
  box-shadow: inset 0 -2px 0 var(--forest-0);
}

.btn:hover {
  background: var(--forest-3);
  color: #fff8e6;
}

.btn-ghost {
  background: transparent;
  color: var(--forest-2);
  border-color: var(--forest-3);
  box-shadow: none;
}

.btn-ghost:hover {
  background: rgba(35, 64, 44, 0.08);
  color: var(--forest-1);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.dl-meta {
  color: var(--muted);
  font-size: 0.86rem;
  margin-top: 8px;
}

.cta-banner {
  border: 2px solid var(--brass);
  background: #fff8e8;
  padding: 16px 16px 18px;
  margin: 12px 0;
}

.cta-banner p {
  margin-bottom: 0.7em;
}

.faq-item {
  border-top: 1px solid var(--rule);
  padding: 14px 0;
}

.faq-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.footer {
  background: #102016;
  border-top: 4px solid var(--brass-dim);
  padding: 22px 0 28px;
  color: #cfc3a2;
  font-size: 0.9rem;
}

.footer p {
  margin: 0 0 0.55em;
}

.muted {
  color: var(--muted);
}

@media (max-width: 900px) {
  .kpi-bar,
  .grid-4 {
    grid-template-columns: 1fr 1fr;
  }

  .grid-2,
  .receipt-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 1.42rem;
  }
}

@media (max-width: 680px) {
  .slip {
    grid-template-columns: 1fr;
  }

  .slip-rail {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    padding: 10px 14px;
    text-align: left;
  }

  .slip-rail::before {
    margin: 0;
  }

  .rail-no {
    margin: 0;
  }

  .kpi-bar,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .nav-row {
    flex-direction: column;
    align-items: flex-start;
  }
}