/* styles.css — M4 前端重构（移动端 375pt 基准，触控目标 ≥44px） */
:root {
  --brand: #00a863;
  --brand-dark: #008a50;
  --ink: #1c2530;
  --ink-2: #5b6570;
  --ink-3: #9aa1ae;
  --bg: #f4f6f8;
  --card: #ffffff;
  --line: #e6e9ee;
  --danger: #d7402e;
  --warn-bg: #fff7e8;
  --warn-ink: #8a5b00;
  --radius: 14px;
  --fallback-line: #9aa1ae;
}
* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }
[hidden] { display: none !important; }
html, body { height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  background: var(--bg); color: var(--ink); font-size: 15px; line-height: 1.5;
}
.app { max-width: 480px; margin: 0 auto; min-height: 100%; background: var(--bg); display: flex; flex-direction: column; }
.view { flex: 1; display: flex; flex-direction: column; }
button { font-family: inherit; border: none; background: none; cursor: pointer; }

/* ===== 首页 Hero ===== */
.hero {
  background: linear-gradient(160deg, #00b470 0%, #008a50 100%);
  color: #fff; padding: 28px 20px 56px; border-radius: 0 0 24px 24px;
}
.hero-brand { display: flex; align-items: center; gap: 12px; }
.hero-logo {
  width: 46px; height: 46px; border-radius: 12px; background: rgba(255,255,255,.18);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; font-weight: 700; border: 1.5px solid rgba(255,255,255,.45);
}
.hero h1 { font-size: 21px; font-weight: 700; letter-spacing: .5px; }
.hero-sub { font-size: 12.5px; opacity: .85; margin-top: 2px; }

/* ===== 搜索卡 ===== */
.search-card {
  margin: -34px 16px 0; background: var(--card); border-radius: var(--radius);
  padding: 16px; box-shadow: 0 6px 24px rgba(20,40,60,.10); position: relative; z-index: 2;
}
.field-row { display: flex; gap: 8px; align-items: stretch; }
.field { flex: 1; position: relative; min-width: 0; }
.field label { display: block; font-size: 12px; color: var(--ink-2); margin-bottom: 4px; }
.field input {
  width: 100%; height: 44px; border: 1.5px solid var(--line); border-radius: 10px;
  padding: 0 12px; font-size: 15px; color: var(--ink); background: #fafbfc; outline: none;
  transition: border-color .15s;
}
.field input:focus { border-color: var(--brand); background: #fff; }
.swap {
  align-self: flex-end; width: 40px; height: 44px; flex: none; margin-bottom: 0;
  color: var(--brand); font-size: 20px; border-radius: 10px;
}
.swap:active { background: #e8f7f0; }
.sugg {
  position: absolute; left: 0; right: 0; top: calc(100% + 4px); z-index: 30;
  background: #fff; border: 1px solid var(--line); border-radius: 10px;
  box-shadow: 0 10px 30px rgba(20,40,60,.14); max-height: 264px; overflow-y: auto; display: none;
}
.sugg.open { display: block; }
.sugg-item { padding: 11px 14px; display: flex; align-items: center; justify-content: space-between; gap: 8px; min-height: 44px; }
.sugg-item:active { background: #f0f6f3; }
.sugg-item .s-name { font-size: 15px; }
.sugg-item .s-badges { display: flex; gap: 4px; flex-wrap: wrap; justify-content: flex-end; }
.sugg-empty { padding: 12px 14px; color: var(--ink-3); font-size: 13px; }
.line-chip {
  display: inline-block; min-width: 22px; height: 18px; line-height: 18px; padding: 0 5px;
  border-radius: 9px; color: #fff; font-size: 11px; font-weight: 600; text-align: center;
}
.btn-query {
  margin-top: 14px; width: 100%; height: 48px; border-radius: 12px;
  background: var(--brand); color: #fff; font-size: 16.5px; font-weight: 600;
  transition: opacity .15s;
}
.btn-query:disabled { background: #c3cad2; cursor: not-allowed; }
.search-tip { margin-top: 10px; font-size: 12px; color: var(--ink-3); text-align: center; }

/* ===== 区块 / chips ===== */
.section { padding: 18px 16px 0; }
.section-title { font-size: 13px; color: var(--ink-2); font-weight: 600; margin-bottom: 10px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  height: 36px; padding: 0 14px; border-radius: 18px; background: #fff;
  border: 1px solid var(--line); font-size: 13.5px; color: var(--ink);
  display: inline-flex; align-items: center; gap: 6px;
}
.chip:active { background: #eef4f1; }
.chip .line-chip { height: 15px; line-height: 15px; font-size: 10px; min-width: 18px; }

/* ===== 结果页 ===== */
.res-header {
  display: flex; align-items: center; gap: 8px; padding: 12px 14px;
  background: var(--brand); color: #fff; position: sticky; top: 0; z-index: 10;
}
.back { width: 40px; height: 40px; font-size: 30px; line-height: 1; color: #fff; margin-left: -8px; }
.res-title { font-size: 16.5px; display: flex; gap: 8px; align-items: center; min-width: 0; }
.res-title strong { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.res-title .arrow { opacity: .8; }

.seg { display: flex; margin: 14px 16px 0; background: #e8ecef; border-radius: 12px; padding: 4px; }
.seg-btn {
  flex: 1; height: 44px; border-radius: 9px; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 1px; color: var(--ink-2);
}
.seg-btn.active { background: #fff; color: var(--ink); box-shadow: 0 1px 4px rgba(0,0,0,.08); }
.seg-name { font-size: 14px; font-weight: 600; }
.seg-meta { font-size: 11px; color: var(--ink-3); }
.seg-btn.active .seg-meta { color: var(--brand-dark); }

/* 摘要卡 */
.summary-card {
  margin: 14px 16px 0; background: var(--card); border-radius: var(--radius);
  padding: 18px 16px; box-shadow: 0 2px 10px rgba(20,40,60,.06);
}
.sum-main { display: flex; align-items: baseline; gap: 6px; }
.sum-min { font-size: 40px; font-weight: 700; color: var(--ink); line-height: 1; }
.sum-unit { font-size: 14px; color: var(--ink-2); }
.sum-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.tag {
  font-size: 12px; padding: 3px 10px; border-radius: 6px; background: #f1f4f6; color: var(--ink-2);
}
.tag.green { background: #e6f7ef; color: var(--brand-dark); }
.tag.red { background: #fdecea; color: var(--danger); }
.tag.warn { background: var(--warn-bg); color: var(--warn-ink); }
.sum-price { margin-top: 12px; padding-top: 12px; border-top: 1px dashed var(--line);
  display: flex; gap: 16px; font-size: 13px; color: var(--ink-2); flex-wrap: wrap; }
.sum-price b { color: var(--ink); font-weight: 600; }

/* 降级提示 */
.degrade {
  margin: 10px 16px 0; padding: 10px 14px; border-radius: 10px;
  background: var(--warn-bg); color: var(--warn-ink); font-size: 12.5px;
}

/* 时间轴 */
.timeline { margin: 14px 16px 20px; position: relative; padding-left: 30px; }
.timeline::before {
  content: ""; position: absolute; left: 9px; top: 8px; bottom: 8px; width: 2px;
  background: var(--line); border-radius: 1px;
}
.tl-node { position: relative; padding: 8px 0 16px; }
.tl-dot {
  position: absolute; left: -30px; top: 10px; width: 20px; height: 20px; border-radius: 50%;
  background: #fff; border: 3px solid var(--ink-3); z-index: 1;
}
.tl-ride .tl-dot { border-color: var(--seg-color, var(--fallback-line)); }
.tl-terminus { font-size: 16.5px; font-weight: 700; }
.tl-ride-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.tl-line-badge {
  display: inline-block; padding: 2px 10px; border-radius: 10px; color: #fff;
  font-size: 12.5px; font-weight: 600; background: var(--seg-color, var(--fallback-line));
}
.tl-dir { font-size: 13px; color: var(--ink-2); }
.tl-meta { font-size: 12px; color: var(--ink-3); margin-top: 4px; display: flex; gap: 10px; flex-wrap: wrap; }
.tl-expand {
  margin-top: 6px; font-size: 12.5px; color: var(--brand-dark);
  display: inline-flex; align-items: center; gap: 4px; min-height: 32px;
}
.tl-stops {
  margin-top: 6px; background: #f7f9fa; border-radius: 10px; padding: 10px 12px;
  font-size: 13px; color: var(--ink-2); display: none;
}
.tl-stops.open { display: block; }
.tl-stops .st { padding: 3px 0; }
.tl-stops .st.current { color: var(--ink); font-weight: 600; }
.tl-transfer-info { font-size: 13.5px; color: var(--ink-2); }
.tl-transfer-info b { color: var(--ink); }
.tl-transfer-sub { font-size: 12px; color: var(--ink-3); margin-top: 2px; }

/* 状态 */
.state-block { padding: 60px 24px; text-align: center; color: var(--ink-2); }
.state-block .ico { font-size: 40px; margin-bottom: 12px; }
.state-block .retry {
  margin-top: 16px; height: 44px; padding: 0 32px; border-radius: 22px;
  background: var(--brand); color: #fff; font-size: 15px;
}
.spinner {
  width: 34px; height: 34px; margin: 0 auto 14px; border-radius: 50%;
  border: 3px solid var(--line); border-top-color: var(--brand);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.skel { margin: 14px 16px 0; background: var(--card); border-radius: var(--radius); padding: 18px 16px; }
.skel-bar { height: 14px; border-radius: 7px; background: #eceff2; margin-bottom: 12px; animation: pulse 1.2s ease-in-out infinite; }
.skel-bar.w60 { width: 60%; } .skel-bar.w40 { width: 40%; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .55; } }

/* 页脚 */
.foot { margin-top: auto; padding: 26px 16px calc(20px + env(safe-area-inset-bottom)); text-align: center; }
.foot p { font-size: 11.5px; color: var(--ink-3); line-height: 1.7; }

@media (min-width: 481px) {
  body { background: #e9edf1; }
  .app { box-shadow: 0 0 40px rgba(0,0,0,.08); }
}

/* ===== v2 改版：线路→站点级联 + 结果就地显示 ===== */
.cascade-row { display: flex; align-items: stretch; gap: 8px; }
.cascade { flex: 1; display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.c-label {
  font-size: 12px; color: var(--ink-3); font-weight: 600; letter-spacing: 1px;
  padding-left: 2px;
}
.c-label.from-label { color: #0a8f4e; }
.c-label.to-label { color: #c2571f; }
.c-select {
  width: 100%; height: 44px; border: 1.5px solid var(--line); border-radius: 10px;
  background: #fff; font-size: 15px; color: var(--ink); padding: 0 10px;
  appearance: none; -webkit-appearance: none;
  background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%239aa1ae' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 12px center;
}
.c-select:focus { outline: none; border-color: var(--brand); }
.c-select:disabled { background-color: #f4f6f8; color: var(--ink-3); }
.c-station { font-weight: 600; }

.res-title-inline {
  margin: 16px 16px 0; padding: 12px 16px; background: var(--card);
  border-radius: var(--radius) var(--radius) 0 0; font-size: 16px;
  border-bottom: 1px solid var(--line);
}
.res-title-inline .arrow { color: var(--ink-3); margin: 0 6px; }
#result-area { scroll-margin-top: 12px; }
#result-area .seg { margin: 12px 16px 0; }
#res-body .summary-card { border-top-left-radius: 0; border-top-right-radius: 0; }

/* ===== 途经站加粗 + 起/终标注 ===== */
.tl-stops .st b { font-weight: 700; color: var(--ink); }
.st-badge {
  display: inline-block; font-size: 10px; line-height: 1; font-weight: 600;
  padding: 2px 5px; border-radius: 4px; margin-right: 5px; vertical-align: 1px;
}
.b-from { background: #0a8f4e; color: #fff; }
.b-to { background: #c2571f; color: #fff; }