/* ============ 基础（航空主题：晴空蓝 + 日出橙） ============ */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --sky-deep: #0e2a47;
  --sky-mid: #14508c;
  --sky-bright: #1e88e5;
  --sunrise: #ff8c42;
  --ink: #1c2733;
  --gray: #61707f;
  --line: #e3e9f0;
  --bg: #f4f8fc;
  --card: #ffffff;
  --ok: #0f9d58;
  --bad: #d93025;
  --warn-bg: #fff6e5;
  --warn-ink: #8a5a00;
  --radius: 14px;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}

a { color: var(--sky-bright); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

:focus-visible {
  outline: 3px solid var(--sunrise);
  outline-offset: 2px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

/* ============ 顶栏 + 导航 ============ */
header {
  background: var(--sky-deep); color: #fff;
  position: sticky; top: 0; z-index: 50;
  box-shadow: 0 2px 12px rgba(6, 24, 48, .28);
}
header .wrap {
  display: flex; align-items: center; gap: 18px;
  padding-top: 12px; padding-bottom: 12px;
  flex-wrap: wrap;
}
.logo { font-size: 20px; font-weight: 700; letter-spacing: .5px; color: #fff; }
.logo:hover { text-decoration: none; }
.logo .dot { color: var(--sunrise); }
.tagline { font-size: 13px; opacity: .7; }

nav.main { margin-left: auto; display: flex; gap: 4px; flex-wrap: wrap; }
nav.main a {
  color: rgba(255, 255, 255, .78);
  font-size: 14px; padding: 7px 14px; border-radius: 8px;
  transition: background .15s, color .15s;
}
nav.main a:hover { background: rgba(255, 255, 255, .12); color: #fff; text-decoration: none; }
nav.main a[aria-current="page"] { background: var(--sky-bright); color: #fff; font-weight: 600; }

/* ============ Hero ============ */
.hero {
  background: linear-gradient(160deg, var(--sky-deep) 0%, var(--sky-mid) 60%, #2a6fc9 100%);
  color: #fff;
  padding: 56px 0 72px;
}
.hero.compact { padding: 40px 0 44px; }
.hero h1 { font-size: 34px; font-weight: 700; margin-bottom: 10px; }
.hero p.sub { font-size: 16px; opacity: .85; margin-bottom: 34px; }
.hero.compact p.sub { margin-bottom: 0; }
.hero p.sub b { color: var(--sunrise); }

.search-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 26px 26px 20px;
  box-shadow: 0 12px 40px rgba(6, 24, 48, .35);
  color: var(--ink);
}

.input-row { display: flex; gap: 10px; }
#track-input {
  flex: 1;
  min-width: 0;
  font-size: 22px;
  font-family: "SF Mono", Consolas, monospace;
  letter-spacing: 2px;
  padding: 14px 18px;
  border: 2px solid var(--line);
  border-radius: 10px;
  outline: none;
  background: #fff;           /* 坑 #5：不显式设背景，自动填充会把输入框染绿 */
  color: var(--ink);
  transition: border-color .15s;
}
#track-input:focus { border-color: var(--sky-bright); }
#track-input::placeholder { letter-spacing: 0; font-family: inherit; font-size: 16px; color: #9aa8b5; }

/* 单号结构示意 */
.anatomy { display: flex; align-items: flex-end; gap: 14px; margin-top: 16px; flex-wrap: wrap; }
.seg { text-align: center; }
.seg-code {
  font-family: "SF Mono", Consolas, monospace;
  font-size: 18px; font-weight: 700; letter-spacing: 3px;
  padding: 4px 10px; border-radius: 8px; display: block;
}
.seg-label { font-size: 11px; color: var(--gray); margin-top: 4px; display: block; }
.seg-prefix .seg-code { background: #e3f0ff; color: #1155aa; }
.seg-serial .seg-code { background: #e4f7ec; color: #0c7a44; }
.seg-check .seg-code { background: #ffefe0; color: #b45a00; }

.samples { margin-top: 14px; font-size: 13px; color: var(--gray); }
.samples .chip {
  display: inline-block; cursor: pointer;
  font-family: Consolas, monospace;
  background: #eef3f8; border: 1px solid var(--line);
  border-radius: 20px; padding: 2px 12px; margin: 2px 4px 2px 0;
  color: var(--ink);
  transition: all .15s;
}
.samples .chip:hover { background: var(--sky-bright); color: #fff; border-color: var(--sky-bright); }

.card-foot {
  margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--line);
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  font-size: 13px; color: var(--gray);
}
.card-foot label { display: flex; align-items: center; gap: 6px; cursor: pointer; }

/* ============ 识别结果 ============ */
.result { margin-top: 18px; }
.result.hidden { display: none; }

.check { font-size: 14px; font-weight: 600; margin-bottom: 10px; }
.check.ok { color: var(--ok); }
.check.bad { color: var(--bad); }

.hit {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap;
  background: #f2f8ff;
  border: 1px solid #cfe3fb;
  border-radius: 10px;
  padding: 14px 18px;
}
.hit-name { font-size: 18px; font-weight: 700; }
.hit-en { font-weight: 400; color: var(--gray); font-size: 15px; }
.hit-meta { font-size: 13px; color: var(--gray); margin-top: 2px; }
.hit-sub { font-size: 13px; color: var(--gray); margin-top: 10px; }

.tag-unverified {
  background: var(--warn-bg); color: var(--warn-ink);
  border-radius: 4px; padding: 1px 6px; font-size: 12px;
}

.actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }

.btn {
  cursor: pointer; border: none; border-radius: 9px;
  font-size: 15px; font-weight: 600; padding: 11px 22px;
  transition: all .15s;
  font-family: inherit;
}
.btn-primary { background: var(--sky-bright); color: #fff; }
.btn-primary:hover { background: #3d9bf0; transform: translateY(-1px); }
.btn-ghost {
  background: #fff; color: var(--sky-mid);
  border: 1px solid var(--line);
  font-size: 13px; font-weight: 500; padding: 8px 14px;
}
.btn-ghost:hover { border-color: var(--sky-bright); color: var(--sky-bright); }

.btn.pulse { animation: pulse 1.1s ease-in-out 3; }
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(30, 136, 229, .5); }
  50% { box-shadow: 0 0 0 10px rgba(30, 136, 229, 0); }
}

.note { font-size: 13px; color: var(--gray); margin-top: 12px; }
.note.warn {
  background: var(--warn-bg); color: var(--warn-ink);
  padding: 10px 14px; border-radius: 8px;
}

.linklike {
  background: none; border: none; cursor: pointer;
  color: var(--sky-bright); font-size: 13px; font-family: inherit;
  padding: 0;
}
.linklike:hover { text-decoration: underline; }

.empty { font-size: 13px; color: var(--gray); }

/* ============ 手动选择航司 ============ */
.picker {
  margin-top: 16px;
  border: 1px solid #cfe3fb; border-radius: 10px;
  background: #fbfdff; padding: 16px;
}
.picker[hidden] { display: none; }
.picker-head {
  display: flex; align-items: center; gap: 10px; margin-bottom: 12px; flex-wrap: wrap;
}
.picker-head h3 { font-size: 15px; }
.picker-head .linklike { margin-left: auto; }
#picker-search {
  width: 100%; padding: 10px 14px; font-size: 15px;
  border: 1px solid var(--line); border-radius: 8px;
  background: #fff; color: var(--ink); outline: none; font-family: inherit;
}
#picker-search:focus { border-color: var(--sky-bright); }
#picker-list {
  margin-top: 12px; max-height: 320px; overflow-y: auto;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 8px;
}
.pick-item {
  display: flex; align-items: center; gap: 10px; text-align: left;
  background: #fff; border: 1px solid var(--line); border-radius: 8px;
  padding: 9px 12px; cursor: pointer; font-family: inherit; font-size: 13px;
  color: var(--ink); transition: all .12s;
}
.pick-item:hover { border-color: var(--sky-bright); background: #f2f8ff; }
.pick-prefix {
  font-family: Consolas, monospace; font-weight: 700; color: #1155aa;
  background: #eef5fd; border-radius: 5px; padding: 2px 8px; flex-shrink: 0;
}
.pick-name { flex: 1; min-width: 0; font-weight: 600; }
.pick-name em { display: block; font-style: normal; font-weight: 400; font-size: 11px; color: var(--gray); }
.pick-meta { font-size: 11px; color: var(--gray); flex-shrink: 0; }

/* ============ 区块 ============ */
section { padding: 56px 0; }
section h2 { font-size: 24px; margin-bottom: 6px; }
section p.desc { color: var(--gray); font-size: 14px; margin-bottom: 26px; }
section.alt { background: #fff; }

/* ============ 追踪历史 ============ */
.history-head {
  display: flex; align-items: center; gap: 10px;
  font-size: 12px; color: var(--gray); margin-bottom: 8px;
}
.history-head .linklike { margin-left: auto; }
.history-list { list-style: none; display: grid; gap: 6px; }
.history-list li {
  display: flex; align-items: center; gap: 12px;
  background: var(--card); border: 1px solid var(--line);
  border-radius: 8px; padding: 8px 12px;
}
.hist-num {
  font-family: Consolas, monospace; font-size: 15px; font-weight: 700;
  background: none; border: none; cursor: pointer; color: var(--sky-mid);
  padding: 0;
}
.hist-num:hover { text-decoration: underline; }
.hist-name { font-size: 13px; color: var(--gray); flex: 1; }
.hist-del {
  background: none; border: none; cursor: pointer;
  color: #b9c4cf; font-size: 18px; line-height: 1; padding: 0 4px;
}
.hist-del:hover { color: var(--bad); }

/* ============ 目录 / 卡片网格 ============ */
#airline-grid, .card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 14px;
}
.dir-card {
  display: block; background: var(--card);
  border: 1px solid var(--line); border-radius: 10px;
  padding: 14px 16px; color: var(--ink);
  transition: all .15s;
}
.dir-card:hover {
  text-decoration: none;
  border-color: var(--sky-bright);
  box-shadow: 0 6px 18px rgba(30, 136, 229, .12);
  transform: translateY(-2px);
}
.dir-name { font-weight: 700; font-size: 15px; }
.dir-en { font-size: 12px; color: var(--gray); margin: 2px 0 8px; }
.dir-prefix {
  font-family: Consolas, monospace; font-size: 13px; font-weight: 700;
  color: #1155aa; background: #eef5fd;
  border-radius: 5px; padding: 3px 10px; display: inline-block;
}

/* ============ 搜索工具条（子页面通用） ============ */
.toolbar {
  display: flex; gap: 10px; flex-wrap: wrap; align-items: center;
  margin-bottom: 20px;
}
.toolbar input[type="search"], .toolbar input[type="text"] {
  flex: 1; min-width: 220px;
  padding: 12px 16px; font-size: 15px; font-family: inherit;
  border: 1px solid var(--line); border-radius: 10px;
  background: #fff; color: var(--ink); outline: none;
}
.toolbar input:focus { border-color: var(--sky-bright); }
.toolbar select {
  padding: 12px 14px; font-size: 14px; font-family: inherit;
  border: 1px solid var(--line); border-radius: 10px;
  background: #fff; color: var(--ink); cursor: pointer;
}
.count { font-size: 13px; color: var(--gray); }

/* ============ 数据表 ============ */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 10px; background: var(--card); }
table.data { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 640px; }
table.data th, table.data td { padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--line); }
table.data th {
  background: #f7fafd; font-size: 12px; color: var(--gray);
  font-weight: 600; letter-spacing: .5px; position: sticky; top: 0;
}
table.data tr:last-child td { border-bottom: none; }
table.data tbody tr:hover { background: #f6fbff; }
table.data .mono {
  font-family: Consolas, monospace; font-weight: 700; color: #1155aa;
}
table.data .sub { font-size: 12px; color: var(--gray); }

/* ============ 原理说明 ============ */
.how-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.how-card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px;
}
.how-card .step {
  display: inline-block; width: 30px; height: 30px; line-height: 30px;
  text-align: center; border-radius: 50%;
  background: var(--sky-bright); color: #fff; font-weight: 700; margin-bottom: 10px;
}
.how-card h3 { font-size: 16px; margin-bottom: 6px; }
.how-card p { font-size: 13px; color: var(--gray); }

/* ============ FAQ ============ */
.faq details {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 10px; padding: 14px 18px; margin-bottom: 10px;
}
.faq summary { cursor: pointer; font-weight: 600; font-size: 15px; }
.faq details p { font-size: 14px; color: var(--gray); margin-top: 10px; }

/* ============ Toast / Footer ============ */
#toast {
  position: fixed; left: 50%; bottom: 40px; transform: translateX(-50%) translateY(20px);
  background: var(--sky-deep); color: #fff;
  padding: 12px 24px; border-radius: 30px; font-size: 14px;
  opacity: 0; pointer-events: none; transition: all .25s;
  box-shadow: 0 8px 24px rgba(0, 0, 0, .25);
  max-width: 90vw; z-index: 100;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

footer {
  background: var(--sky-deep); color: rgba(255, 255, 255, .65);
  font-size: 13px; padding: 26px 0; text-align: center;
}
footer a { color: rgba(255, 255, 255, .85); }
footer .disclaimer { font-size: 12px; opacity: .7; margin-top: 8px; }

/* ============ 响应式 ============ */
@media (max-width: 720px) {
  header .wrap { gap: 10px; }
  nav.main { margin-left: 0; width: 100%; }
  nav.main a { padding: 6px 10px; font-size: 13px; }
  .tagline { display: none; }
}

@media (max-width: 560px) {
  .hero { padding: 36px 0 48px; }
  .hero h1 { font-size: 25px; }
  .search-card { padding: 18px 16px 14px; }
  .input-row { flex-direction: column; }
  #track-input { font-size: 17px; letter-spacing: 1px; }
  .input-row .btn { width: 100%; }
  .hit { flex-direction: column; align-items: flex-start; }
  .hit .btn { width: 100%; }
  section { padding: 40px 0; }
}