/* ============ 基础（快递主题：深蓝底 + 递送青绿）============
   版式对齐姊妹站「箱迹Track」(sea) 与「航迹Track」(air)：
   同一套 header / hero / search-card 骨架，仅强调色按站点区分。 */
* { margin: 0; padding: 0; box-sizing: border-box; }

/* ★ 必须最先声明：类选择器里的 display:flex 会盖掉 hidden 属性自带的
   display:none（UA 样式表优先级最低），导致 JS 的 el.hidden = true 完全失效。 */
[hidden] { display: none !important; }

:root {
  --ink-deep: #0e2a47;
  --ink-mid: #14508c;
  --bright: #1e88e5;
  --accent: #19b9a5;        /* 递送青绿（air 用日出橙，sea 用海蓝，按站点区分）*/
  --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(--bright); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input, select { font-family: inherit; }

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

:focus-visible { outline: 3px solid var(--accent); 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 的 wrap 是全宽（logo 贴左边缘），hero/内容区的 wrap 仍是 1080px 居中；
   导航紧贴 logo 左对齐，激活态用下划线而非填充块。 */
header {
  background: var(--ink-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: 40px;
  min-height: 60px; max-width: 100%;
  padding: 0 24px;
  flex-wrap: nowrap;
}

/* 品牌区只有文字块：立方体图标已移到标签页 favicon，顶栏不再重复 */
.brand { display: flex; align-items: center; flex: none; }

/* 副标与主标题两端对齐：块宽由「快迹Track」撑出，副标五个字 justify 铺满同宽 */
.logo-block { display: flex; flex-direction: column; gap: 5px; flex: none; }
.logo { color: #fff; font-size: 20px; font-weight: 700; letter-spacing: .5px; line-height: 1.1; }
.logo:hover { color: #fff; text-decoration: none; }
.logo-sub {
  font-size: 12px; font-weight: 500; color: var(--accent); line-height: 1;
  text-align: justify; text-align-last: justify;
  text-decoration: none;
}
.logo-sub:hover { color: #5fd8c8; text-decoration: none; }

nav.main-nav { display: flex; gap: 2px; flex-wrap: wrap; }
nav.main-nav a {
  color: rgba(255, 255, 255, .7);
  font-size: 15px; font-weight: 500;
  padding: 19px 15px; line-height: 1;
  border-bottom: 3px solid transparent;
  transition: color .15s, border-color .15s;
}
nav.main-nav a:hover { color: #fff; text-decoration: none; }
nav.main-nav a.active { color: #fff; font-weight: 600; border-bottom-color: var(--accent); }

.lang-toggle {
  margin-left: auto; flex: none;
  padding: 6px 15px; border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, .35);
  background: transparent; color: #fff;
  cursor: pointer; font-size: 13px;
  transition: background .15s;
}
.lang-toggle:hover { background: rgba(255, 255, 255, .14); }

/* ============ Hero ============ */
.hero {
  background: linear-gradient(160deg, var(--ink-deep) 0%, var(--ink-mid) 60%, #2a6fc9 100%);
  color: #fff;
  padding: 56px 0 72px;
}
.hero h1.solo { font-size: 34px; font-weight: 700; margin-bottom: 30px; }

.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);
}

/* ============ 首次访问的语言偏好选择条 ============ */
.welcome {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  background: #f2fbfa; border: 1px solid #c7ece6;
  border-radius: 10px; padding: 13px 16px; margin-bottom: 18px;
}
.welcome-text { flex: 1; min-width: 220px; }
.welcome-text b { display: block; font-size: 14px; color: var(--ink-deep); }
.welcome-text span { font-size: 12.5px; color: var(--gray); }
.welcome-actions { display: flex; gap: 7px; flex-wrap: wrap; }

/* ============ 输入 ============ */
.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;           /* 不显式设背景，浏览器自动填充会把输入框染绿 */
  color: var(--ink);
  transition: border-color .15s;
}
#track-input:focus { border-color: var(--bright); }
#track-input::placeholder { letter-spacing: 0; font-family: inherit; font-size: 15px; 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;
  background: #eef3f8; color: var(--ink);
  word-break: break-all;
}
.seg-label { font-size: 11px; color: var(--gray); margin-top: 4px; display: block; }
.seg-prefix  .seg-code { background: #e3f0ff; color: #1155aa; }
.seg-shipper .seg-code { background: #e4f7ec; color: #0c7a44; }
.seg-service .seg-code { background: #f1ecfe; color: #5b3bb8; }
.seg-serial  .seg-code { background: #eef3f8; color: #33465c; }
.seg-check   .seg-code { background: #ffefe0; color: #b45a00; }
.seg-country .seg-code { background: #fdeaf0; color: #ad2050; }
.anatomy.is-placeholder .seg-code { opacity: .55; }

/* ============ 示例 / 历史 chips ============ */
.samples, .history {
  display: flex; align-items: center; flex-wrap: wrap; gap: 6px;
  margin-top: 14px; font-size: 13px; color: var(--gray);
}
.samples-label, .history-label { flex-shrink: 0; }
.history-chips { display: inline-flex; flex-wrap: wrap; gap: 6px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px; cursor: pointer;
  font-family: Consolas, monospace;
  background: #eef3f8; border: 1px solid var(--line);
  border-radius: 20px; padding: 3px 12px;
  color: var(--ink); font-size: 13px;
  transition: all .15s;
}
.chip:hover { background: var(--bright); color: #fff; border-color: var(--bright); }
.chip-del {
  background: none; border: none; cursor: pointer; padding: 0;
  color: inherit; opacity: .45; font-size: 14px; line-height: 1;
}
.chip-del:hover { opacity: 1; }

/* ============ 卡片底部 ============ */
.card-foot {
  margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--line);
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  font-size: 13px; color: var(--gray);
}
.card-foot label { display: flex; align-items: center; gap: 6px; cursor: pointer; }
.card-foot input[type=checkbox] { width: 15px; height: 15px; accent-color: var(--bright); }
.foot-hint { color: #9aa8b5; font-size: 12px; }
.card-foot .linklike { margin-left: auto; }

/* ============ 识别结果 ============ */
.result { margin-top: 18px; }
.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-main { min-width: 0; }
.hit-name { font-size: 18px; font-weight: 700; }
.hit-en { font-weight: 400; color: var(--gray); font-size: 15px; }
.hit-meta { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.tag { font-size: 12px; padding: 1px 8px; border-radius: 4px; border: 1px solid transparent; }
.tag-ok { background: #e4f7ec; color: #0c7a44; border-color: #c3e8d3; }
.tag-warn { background: var(--warn-bg); color: var(--warn-ink); border-color: #f2dcae; }
.tag-soft { background: #eef3f8; color: var(--gray); border-color: var(--line); }
.tag-lang { background: #e6f8f5; color: #0b7d6e; border-color: #b9e8e0; }

.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(--bright); color: #fff; }
.btn-primary:hover { background: #3d9bf0; transform: translateY(-1px); }
.btn-ghost {
  background: #fff; color: var(--ink-mid);
  border: 1px solid var(--line);
  font-size: 13px; font-weight: 500; padding: 8px 14px;
}
.btn-ghost:hover { border-color: var(--bright); color: var(--bright); }

.note { font-size: 13px; color: var(--gray); margin-top: 12px; }
.note-tip {
  background: #f2fbfa; border: 1px solid #c7ece6; border-left: 3px solid var(--accent);
  padding: 10px 14px; border-radius: 8px;
}
.note-tip b { display: block; color: var(--ink-deep); }
.note-muted { background: #f6f8fa; border: 1px solid var(--line); border-left: 3px solid #b9c4cf; padding: 10px 14px; border-radius: 8px; }

.warnings { margin-top: 14px; display: flex; flex-direction: column; gap: 8px; }
.warn {
  background: var(--warn-bg); color: var(--warn-ink);
  border: 1px solid #f2dcae; border-radius: 8px;
  padding: 10px 14px; font-size: 13px;
}
.warn b { margin-right: 4px; }

.others {
  margin-top: 12px; padding-top: 12px; border-top: 1px dashed var(--line);
  display: flex; align-items: center; flex-wrap: wrap; gap: 6px;
  font-size: 13px; color: var(--gray);
}

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

/* ============ 手动选择承运商（卡内折叠）============ */
.picker {
  margin-top: 16px;
  border: 1px solid #cfe3fb; border-radius: 10px;
  background: #fbfdff; padding: 16px;
}
.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, #carrier-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, #carrier-search:focus { border-color: var(--bright); }
#picker-list, .carrier-list {
  margin-top: 12px; display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 8px;
}
#picker-list { max-height: 320px; overflow-y: auto; }
.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(--bright); background: #f2f8ff; }
.pick-dot { width: 9px; height: 9px; border-radius: 50%; flex: none; }
.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: 22px; }
section.alt { background: #fff; }

/* ============ 实用工具 ============ */
.tool-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); gap: 16px; }
.tool-card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px;
}
section.alt .tool-card { background: var(--bg); }
.tool-card h3 { font-size: 16px; margin-bottom: 6px; display: flex; align-items: center; gap: 8px; }
.tool-desc { font-size: 13px; color: var(--gray); margin-bottom: 14px; }
.badge-soft {
  font-size: 10px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  color: #0b7d6e; background: #e6f8f5; padding: 2px 7px; border-radius: 999px;
}
.input-row-sm input {
  flex: 1; min-width: 0; background: #fff;
  border: 1px solid var(--line); border-radius: 8px;
  padding: 9px 12px; font-size: 14px; color: var(--ink); outline: none;
}
.input-row-sm input:focus { border-color: var(--bright); }
.email-status { margin-top: 9px; font-size: 12.5px; }
.email-status .ok { color: var(--ok); }
.email-status .bad { color: var(--bad); }
.fineprint { margin-top: 10px; color: #9aa8b5; font-size: 12px; line-height: 1.55; }

.prefs-row { display: flex; align-items: center; gap: 10px; margin-bottom: 9px; font-size: 13.5px; }
.prefs-row > span { color: var(--gray); flex: none; min-width: 5.5em; }
.prefs-row select {
  flex: 1; min-width: 0; background: #fff;
  border: 1px solid var(--line); border-radius: 8px;
  padding: 7px 9px; font-size: 13px; color: var(--ink); cursor: pointer; outline: none;
}
.prefs-row select:focus { border-color: var(--bright); }

.quick-list { display: flex; flex-wrap: wrap; gap: 7px; }
.quick-item {
  border: 1px solid var(--line); border-left: 3px solid var(--brand, var(--ink-mid));
  background: #fff; border-radius: 8px; padding: 7px 11px;
  font-size: 12.5px; cursor: pointer; color: var(--ink); font-family: inherit;
  transition: all .12s;
}
.quick-item:hover { border-color: var(--bright); border-left-color: var(--brand, var(--ink-mid)); background: #f2f8ff; }

/* ============ 页脚 ============ */
.footer { background: var(--ink-deep); color: rgba(255, 255, 255, .62); padding: 30px 0 38px; font-size: 13px; }
.footer p { margin-bottom: 8px; }
.footer a { color: rgba(255, 255, 255, .85); }
.footer-brand { color: #fff; font-weight: 600; font-size: 15px; }
.footer-sib { display: flex; gap: 18px; flex-wrap: wrap; }

/* ============ Toast ============ */
.toast {
  position: fixed; left: 50%; bottom: 28px;
  transform: translate(-50%, 16px);
  background: var(--ink-deep); color: #fff;
  padding: 12px 20px; border-radius: 999px; font-size: 13.5px;
  box-shadow: 0 12px 30px rgba(6, 24, 48, .4);
  opacity: 0; pointer-events: none;
  transition: opacity .2s, transform .2s;
  max-width: calc(100vw - 40px); text-align: center; z-index: 100;
}
.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }
.toast-warn { background: #8a5a00; }

/* ============ 响应式 ============ */
@media (max-width: 820px) {
  header .wrap { flex-wrap: wrap; gap: 12px 20px; padding: 10px 16px; }
  nav.main-nav a { padding: 10px 10px; font-size: 14px; }
  .lang-toggle { margin-left: auto; }
  .hero { padding: 36px 0 52px; }
  .hero h1.solo { font-size: 25px; margin-bottom: 22px; }
  .search-card { padding: 18px 18px 14px; }
  #track-input { font-size: 18px; padding: 12px 14px; }
  .input-row { flex-direction: column; }
  .btn-primary { width: 100%; }
  section { padding: 40px 0; }
  #picker-list, .carrier-list { grid-template-columns: 1fr; }
}