/* ═══════════════════════════════════════════════════════════════
   产品问题档案 —— 「档案索引卡」编辑部风格
   米纸底 · 墨线框 · 朱砂强调 · 衬线标题 · 荧光笔高亮
   ═══════════════════════════════════════════════════════════════ */

:root {
  --paper:      #f4efe3;
  --paper-deep: #ece5d3;
  --card:       #fbf8ef;
  --ink:        #211d16;
  --ink-soft:   #6b6355;
  --accent:     #c8401f;   /* 朱砂红 */
  --accent-dim: #a53517;
  --mark:       #ffd94a;   /* 荧光笔 */
  --mark-edge:  #f0b429;
  --line:       #211d16;
  --shadow:     4px 4px 0 rgba(33, 29, 22, 0.92);
  --shadow-sm:  2px 2px 0 rgba(33, 29, 22, 0.92);
  --serif: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", Georgia, "Times New Roman", serif;
  --sans:  "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --mono:  "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ── 纸张颗粒质感 ─────────────────────────── */
.paper-grain {
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
  background-image:
    radial-gradient(rgba(33, 29, 22, 0.045) 1px, transparent 1px),
    radial-gradient(rgba(200, 64, 31, 0.028) 1px, transparent 1px);
  background-size: 3px 3px, 7px 7px;
  background-position: 0 0, 1px 2px;
}

/* ══════════ 页首报头 ══════════ */
.masthead {
  position: relative;
  z-index: 1;
  border-bottom: 3px double var(--line);
  padding: 44px 24px 30px;
}
.masthead-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.masthead-no {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  border: 1px solid var(--ink);
  padding: 2px 10px;
  margin-bottom: 14px;
  background: var(--card);
  box-shadow: var(--shadow-sm);
}
.masthead h1 {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(38px, 7vw, 64px);
  letter-spacing: 0.08em;
  line-height: 1.15;
}
.masthead h1::after {
  content: "";
  display: block;
  width: 72px; height: 6px;
  margin-top: 10px;
  background: var(--accent);
}
.masthead-sub {
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
}

.masthead-stats {
  display: flex;
  gap: 12px;
}
.stat {
  border: 1.5px solid var(--ink);
  background: var(--card);
  box-shadow: var(--shadow-sm);
  padding: 10px 18px;
  text-align: center;
  min-width: 92px;
}
.stat-num {
  display: block;
  font-family: var(--serif);
  font-size: 32px;
  font-weight: 900;
  color: var(--accent);
  line-height: 1.1;
}
.stat-label {
  font-size: 11px;
  letter-spacing: 0.25em;
  color: var(--ink-soft);
}

/* ══════════ 检索台（吸顶） ══════════ */
.console {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--paper);
  border-bottom: 1.5px solid var(--line);
  box-shadow: 0 6px 18px -12px rgba(33, 29, 22, 0.45);
}
.console-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 16px 24px 12px;
}
.searchbox {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--card);
  border: 1.5px solid var(--ink);
  box-shadow: var(--shadow);
  padding: 0 14px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.searchbox:focus-within {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(33, 29, 22, 0.92);
}
.search-icon { width: 18px; height: 18px; flex: none; color: var(--accent); }
.searchbox input {
  flex: 1;
  min-width: 0;
  border: none;
  outline: none;
  background: transparent;
  font-family: var(--sans);
  font-size: 16px;
  color: var(--ink);
  padding: 13px 0;
}
.searchbox input::placeholder { color: #a89e8c; }
.clear-btn {
  flex: none;
  border: 1.5px solid var(--accent);
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  letter-spacing: 0.1em;
  padding: 5px 12px;
  cursor: pointer;
  transition: background 0.15s;
}
.clear-btn:hover { background: var(--accent-dim); border-color: var(--accent-dim); }

/* ── 产品快捷导航 ── */
.product-nav {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: thin;
}
.nav-chip {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 1.5px solid var(--ink);
  background: var(--card);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 13px;
  padding: 6px 13px;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.12s ease, background 0.12s ease, color 0.12s ease;
}
.nav-chip .chip-no {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--accent);
}
.nav-chip:hover, .nav-chip.active {
  background: var(--ink);
  color: var(--paper);
  transform: translateY(-2px);
}
.nav-chip:hover .chip-no, .nav-chip.active .chip-no { color: var(--mark); }

/* ══════════ 主内容 ══════════ */
.main {
  position: relative;
  z-index: 1;
  max-width: 960px;
  margin: 0 auto;
  padding: 34px 24px 80px;
}
.result-meta {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  margin-bottom: 20px;
  padding-left: 2px;
}
.result-meta b { color: var(--accent); font-weight: 700; }

/* ── 产品分区（索引卡） ── */
.product {
  background: var(--card);
  border: 1.5px solid var(--ink);
  box-shadow: var(--shadow);
  margin-bottom: 34px;
  scroll-margin-top: 140px;
  animation: rise 0.5s cubic-bezier(0.22, 1, 0.36, 1) both;
  animation-delay: var(--rise-delay, 0s);
}
@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}
.product-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  padding: 18px 22px 14px;
  border-bottom: 1.5px dashed rgba(33, 29, 22, 0.45);
}
.product-index {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  color: #fff;
  background: var(--accent);
  padding: 3px 8px;
  transform: translateY(-2px);
}
.product-head h2 {
  font-family: var(--serif);
  font-size: clamp(20px, 3.4vw, 26px);
  font-weight: 900;
  letter-spacing: 0.04em;
}
.product-count {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-soft);
  letter-spacing: 0.1em;
}
.product.flash { animation: flash 0.9s ease; }
@keyframes flash {
  0%, 100% { box-shadow: var(--shadow); }
  30%      { box-shadow: 0 0 0 5px rgba(255, 217, 74, 0.9), var(--shadow); }
}

/* ── 问题条目 ── */
.issue { border-bottom: 1px solid rgba(33, 29, 22, 0.18); }
.issue:last-child { border-bottom: none; }
.issue-head {
  width: 100%;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 22px;
  border: none;
  background: transparent;
  cursor: pointer;
  text-align: left;
  font-family: var(--sans);
  transition: background 0.15s;
}
.issue-head:hover { background: rgba(200, 64, 31, 0.06); }
.issue-no {
  flex: none;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  border: 1px solid currentColor;
  padding: 1px 6px;
  transform: translateY(-1px);
}
.issue-title {
  flex: 1;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--ink);
}
.issue-caret {
  flex: none;
  font-family: var(--mono);
  font-size: 16px;
  color: var(--accent);
  transition: transform 0.25s ease;
}
.issue.open .issue-caret { transform: rotate(45deg); }
.issue-body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}
.issue.open .issue-body { grid-template-rows: 1fr; }
.issue-body-inner { overflow: hidden; }
.issue-content {
  padding: 2px 22px 20px 62px;
  font-size: 14.5px;
  color: #3d382e;
  white-space: pre-line;
}

/* ── 荧光笔关键词高亮 ── */
mark {
  background: linear-gradient(104deg, transparent 1%, var(--mark) 3%, var(--mark) 97%, transparent 99%);
  color: var(--ink);
  padding: 1px 3px;
  margin: 0 -1px;
  border-radius: 2px;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
  text-shadow: 0 0 0 var(--ink);
  font-weight: 600;
}
.issue-title mark { font-weight: 700; }
mark.hit-name {
  background: linear-gradient(104deg, transparent 1%, #ffd0bd 3%, #ffd0bd 97%, transparent 99%);
}

/* ── 命中徽章 ── */
.match-badge {
  flex: none;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--accent);
  border: 1px dashed var(--accent);
  padding: 2px 7px;
  transform: rotate(-2deg);
}

/* ══════════ 空状态 ══════════ */
.empty { padding: 40px 0; }
.empty-card {
  position: relative;
  border: 1.5px dashed var(--ink);
  background: var(--card);
  padding: 56px 28px;
  text-align: center;
}
.empty-stamp {
  display: inline-block;
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(28px, 6vw, 44px);
  letter-spacing: 0.3em;
  color: var(--accent);
  border: 3px solid var(--accent);
  padding: 8px 26px 8px 36px;
  transform: rotate(-6deg);
  opacity: 0.85;
  margin-bottom: 26px;
  mask-image: radial-gradient(circle at 30% 60%, black 96%, transparent 97%),
              radial-gradient(circle at 70% 30%, black 95%, transparent 96%);
}
.empty-title {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 10px;
}
.empty-hint {
  font-size: 13.5px;
  color: var(--ink-soft);
  margin-bottom: 26px;
}
.empty-reset {
  border: 1.5px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  font-size: 14px;
  padding: 10px 24px;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform 0.12s, box-shadow 0.12s;
}
.empty-reset:hover { transform: translate(-2px, -2px); box-shadow: 4px 4px 0 rgba(33,29,22,0.92); }

/* ══════════ 页脚 ══════════ */
.footer {
  position: relative;
  z-index: 1;
  border-top: 1.5px solid var(--line);
  padding: 22px 24px 34px;
  text-align: center;
  font-size: 12px;
  color: var(--ink-soft);
}
.footer code {
  font-family: var(--mono);
  font-size: 11px;
  background: var(--card);
  border: 1px solid rgba(33,29,22,0.3);
  padding: 1px 6px;
}

/* ══════════ 移动端 ══════════ */
@media (max-width: 640px) {
  .masthead { padding: 30px 16px 22px; }
  .masthead-inner { flex-direction: column; align-items: flex-start; gap: 18px; }
  .stat { min-width: 78px; padding: 8px 12px; }
  .stat-num { font-size: 24px; }
  .console-inner { padding: 12px 16px 10px; }
  .main { padding: 24px 16px 60px; }
  .product { box-shadow: 3px 3px 0 rgba(33,29,22,0.92); }
  .product-head { padding: 14px 16px 12px; }
  .issue-head { padding: 13px 16px; gap: 10px; }
  .issue-content { padding: 0 16px 18px 46px; }
  .issue-no { display: none; }
}