/* =========================================================
   网际快车 WJKC.cloud — 青柠电车站设计系统
   Design tokens, base, layout, components, responsive
   ========================================================= */

:root {
  --bg: #F9FFFC;
  --primary: #66BB6A;
  --primary-dark: #4E9950;
  --primary-soft: #C8E6C9;
  --text: #263238;
  --text-secondary: #607D8B;
  --border: #E3F3E7;
  --card: #FFFFFF;
  --card-tint: #F3FBF5;
  --warning-bg: #FFF4E5;
  --warning-border: #FFCC80;
  --warning-text: #8A5300;
  --danger-bg: #FDECEC;
  --danger-border: #F5B5B5;
  --danger-text: #9A2E2E;
  --shadow-sm: 0 1px 2px rgba(38, 50, 56, 0.06);
  --shadow-md: 0 6px 20px rgba(102, 187, 106, 0.12);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --max-width: 1280px;
  --content-width: 780px;
  --sidebar-width: 300px;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
    "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { color: var(--text); line-height: 1.35; font-weight: 700; letter-spacing: -0.01em; }
h1 { font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.3rem); margin: 0 0 .6em; }
h2 { font-size: clamp(1.25rem, 1.05rem + 0.8vw, 1.6rem); margin: 1.8em 0 .7em; }
h3 { font-size: 1.15rem; margin: 1.4em 0 .5em; }
p { margin: 0 0 1.1em; }
ul, ol { margin: 0 0 1.1em; padding-left: 1.4em; }
li { margin-bottom: .4em; }
code { background: var(--card-tint); border: 1px solid var(--border); border-radius: 4px; padding: .1em .4em; font-size: .92em; }
hr { border: none; border-top: 1px dashed var(--border); margin: 2em 0; }
:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.skip-link {
  position: absolute; left: -9999px; top: 0; background: var(--primary); color: #fff;
  padding: 10px 16px; z-index: 200; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(249, 255, 252, 0.92);
  backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 1.15rem; color: var(--text); }
.brand .brand-emoji { font-size: 1.3rem; }
.brand .brand-en { color: var(--text-secondary); font-weight: 600; font-size: .78rem; letter-spacing: .06em; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  color: var(--text); font-weight: 600; font-size: .93rem; padding: 8px 12px; border-radius: 999px;
}
.main-nav a:hover, .main-nav a[aria-current="page"] { background: var(--primary-soft); color: var(--primary-dark); text-decoration: none; }
.header-actions { display: flex; align-items: center; gap: 10px; }
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px;
  border-radius: 999px; border: 1px solid var(--border); background: var(--card); cursor: pointer; color: var(--text);
}
.icon-btn:hover { background: var(--primary-soft); }
.nav-toggle { display: none; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 20px; border-radius: 999px; font-weight: 700; font-size: .92rem;
  border: 1px solid transparent; cursor: pointer; white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); text-decoration: none; }
.btn-outline { background: var(--card); color: var(--primary-dark); border-color: var(--primary-soft); }
.btn-outline:hover { background: var(--primary-soft); text-decoration: none; }
.btn-sm { padding: 7px 14px; font-size: .84rem; }

.mobile-menu {
  display: none; position: fixed; inset: 0; z-index: 150; background: var(--bg);
  padding: 20px 24px; overflow-y: auto;
}
.mobile-menu.open { display: block; }
.mobile-menu-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.mobile-menu nav { display: flex; flex-direction: column; gap: 4px; }
.mobile-menu nav a { padding: 14px 4px; font-size: 1.05rem; font-weight: 700; border-bottom: 1px solid var(--border); color: var(--text); }
.mobile-menu .btn { margin-top: 20px; width: 100%; }

/* ---------- Route line (WJKC LINE) ---------- */
.route-line { display: flex; align-items: center; flex-wrap: wrap; gap: 0; margin: 28px 0; }
.route-line .route-label {
  font-size: .72rem; font-weight: 800; letter-spacing: .12em; color: var(--primary-dark);
  background: var(--primary-soft); padding: 4px 10px; border-radius: 999px; margin-right: 14px;
}
.route-track { display: flex; align-items: center; flex-wrap: wrap; gap: 0; flex: 1; }
.route-stop { display: flex; align-items: center; gap: 8px; }
.route-dot {
  width: 12px; height: 12px; border-radius: 50%; background: var(--primary); border: 2px solid var(--card);
  box-shadow: 0 0 0 2px var(--primary); flex-shrink: 0;
}
.route-stop a, .route-stop span.route-text { font-size: .88rem; font-weight: 700; color: var(--text); white-space: nowrap; }
.route-connector { width: 26px; height: 2px; background: repeating-linear-gradient(90deg, var(--primary) 0 6px, transparent 6px 10px); margin: 0 6px; }

/* ---------- Route map (home) ---------- */
.route-map { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.route-map-line { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 22px; }
.route-map-line h3 { display: flex; align-items: center; gap: 8px; margin-top: 0; font-size: 1rem; }
.route-map-line h3 .line-tag { font-size: .68rem; letter-spacing: .1em; background: var(--primary-soft); color: var(--primary-dark); padding: 2px 8px; border-radius: 999px; }
.route-map-stations { position: relative; padding-left: 22px; border-left: 2px dashed var(--primary-soft); margin-top: 14px; }
.route-map-station { position: relative; padding: 0 0 18px 14px; }
.route-map-station::before {
  content: ""; position: absolute; left: -29px; top: 4px; width: 10px; height: 10px; border-radius: 50%;
  background: var(--card); border: 2px solid var(--primary);
}
.route-map-station a { font-weight: 700; font-size: .9rem; color: var(--text); }
.route-map-station a:hover { color: var(--primary-dark); }
.route-map-station .station-no { color: var(--text-secondary); font-size: .78rem; margin-right: 4px; }

/* ---------- Hero ---------- */
.hero { padding: 56px 0 20px; text-align: center; }
.hero .eyebrow {
  display: inline-flex; align-items: center; gap: 6px; font-size: .8rem; font-weight: 800;
  color: var(--primary-dark); background: var(--primary-soft); padding: 6px 14px; border-radius: 999px; margin-bottom: 18px;
}
.hero h1 { max-width: 820px; margin-inline: auto; }
.hero p.lead { max-width: 680px; margin: 0 auto 26px; color: var(--text-secondary); font-size: 1.05rem; }
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ---------- Info board (departure board) ---------- */
.info-board {
  background: var(--text); color: #E6F5E8; border-radius: var(--radius-lg); padding: 26px 28px;
  font-family: "Consolas", "SFMono-Regular", var(--font-sans); position: relative; overflow: hidden;
}
.info-board::before { content: "🚃"; position: absolute; right: 20px; top: 18px; font-size: 1.6rem; opacity: .5; }
.info-board .board-title { font-weight: 800; letter-spacing: .04em; color: #A5D6A7; font-size: .82rem; margin-bottom: 14px; }
.info-board dl { display: grid; grid-template-columns: 140px 1fr; row-gap: 12px; column-gap: 12px; margin: 0; }
.info-board dt { color: #9FC7A5; font-size: .84rem; }
.info-board dd { margin: 0; font-size: .92rem; }
.info-board .board-cta { margin-top: 18px; }

/* ---------- Sections ---------- */
.section { padding: 44px 0; }
.section-head { margin-bottom: 24px; }
.section-head .kicker { font-size: .78rem; font-weight: 800; letter-spacing: .1em; color: var(--primary-dark); text-transform: uppercase; }
.section-head h2 { margin-top: 6px; }
.section-head p { color: var(--text-secondary); max-width: 640px; }
.section-alt { background: var(--card-tint); }

/* ---------- Station cards (article cards) ---------- */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.station-card {
  display: flex; flex-direction: column; background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 20px; transition: box-shadow .15s, transform .15s;
}
.station-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); text-decoration: none; }
.station-card .card-meta { display: flex; align-items: center; gap: 6px; font-size: .72rem; font-weight: 800; letter-spacing: .06em; color: var(--primary-dark); margin-bottom: 10px; }
.station-card .card-meta .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--primary); }
.station-card h3 { margin: 0 0 8px; font-size: 1.02rem; color: var(--text); }
.station-card p { color: var(--text-secondary); font-size: .88rem; margin: 0 0 14px; flex: 1; }
.station-card .card-foot { display: flex; justify-content: space-between; align-items: center; font-size: .78rem; color: var(--text-secondary); }
.station-card .next-link { font-weight: 700; color: var(--primary-dark); }

/* ---------- Buttons row / CTA banner ---------- */
.cta-banner {
  background: linear-gradient(135deg, var(--primary-soft), var(--card-tint));
  border: 1px solid var(--primary-soft); border-radius: var(--radius-lg); padding: 32px; text-align: center;
}

/* ---------- Callouts ---------- */
.callout { border-radius: var(--radius-md); padding: 18px 20px; margin: 1.6em 0; border: 1px solid var(--border); background: var(--card-tint); }
.callout-title { font-weight: 800; margin: 0 0 8px; display: flex; align-items: center; gap: 8px; }
.callout-body p:last-child { margin-bottom: 0; }
.callout-risk { background: var(--warning-bg); border-color: var(--warning-border); }
.callout-risk .callout-title { color: var(--warning-text); }
.callout-tip { background: var(--card-tint); border-color: var(--primary-soft); }
.callout-tip .callout-title { color: var(--primary-dark); }
.callout-conclusion { background: #EFFAF0; border-color: var(--primary-soft); }
.callout-quote { background: var(--card); border-left: 4px solid var(--primary); font-style: normal; }

/* board-style page-level risk notice ("乘车提醒") */
.ride-notice {
  background: var(--warning-bg); border: 1px dashed var(--warning-border); border-radius: var(--radius-lg);
  padding: 24px 26px; margin: 0;
}
.ride-notice .notice-tag {
  display: inline-flex; align-items: center; gap: 6px; font-size: .74rem; font-weight: 800; letter-spacing: .08em;
  color: var(--warning-text); background: #FFE3B3; padding: 4px 10px; border-radius: 999px; margin-bottom: 12px;
}
.ride-notice p { color: var(--warning-text); margin-bottom: 10px; }
.ride-notice ul { margin: 10px 0 0; padding-left: 1.2em; }
.ride-notice a { color: var(--warning-text); text-decoration: underline; font-weight: 700; }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; margin: 1.4em 0; border: 1px solid var(--border); border-radius: var(--radius-md); }
table { border-collapse: collapse; width: 100%; min-width: 480px; font-size: .92rem; }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--border); }
th { background: var(--card-tint); color: var(--text); font-weight: 800; white-space: nowrap; }
tr:last-child td { border-bottom: none; }

/* ---------- Quick answer / summary box ---------- */
.quick-answer {
  background: var(--card); border: 2px solid var(--primary-soft); border-radius: var(--radius-lg);
  padding: 20px 22px; margin: 0 0 28px;
}
.quick-answer .qa-label { display: flex; align-items: center; gap: 8px; font-weight: 800; color: var(--primary-dark); font-size: .82rem; letter-spacing: .05em; margin-bottom: 10px; }
.quick-answer p { margin: 0; color: var(--text); }
.summary-bullets { background: var(--card-tint); border-radius: var(--radius-md); padding: 18px 22px; margin: 0 0 28px; }
.summary-bullets .qa-label { font-weight: 800; color: var(--primary-dark); font-size: .82rem; letter-spacing: .05em; margin-bottom: 10px; }
.summary-bullets ul { margin: 0; padding-left: 1.2em; }
.summary-bullets li { margin-bottom: 6px; }

/* ---------- Article layout ---------- */
.article-shell { display: grid; grid-template-columns: 1fr var(--sidebar-width); gap: 40px; align-items: start; padding: 32px 0 60px; }
.article-main { max-width: var(--content-width); }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 4px; font-size: .82rem; color: var(--text-secondary); margin-bottom: 16px; }
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb .sep { margin: 0 4px; }
.breadcrumb .current { color: var(--text); font-weight: 700; }
.article-tags { display: flex; gap: 8px; align-items: center; margin-bottom: 14px; flex-wrap: wrap; }
.tag-pill { font-size: .72rem; font-weight: 800; letter-spacing: .06em; color: var(--primary-dark); background: var(--primary-soft); padding: 4px 10px; border-radius: 999px; }
.article-meta { display: flex; gap: 16px; flex-wrap: wrap; color: var(--text-secondary); font-size: .84rem; margin-bottom: 26px; }
.article-meta span { display: inline-flex; align-items: center; gap: 5px; }
.article-body h2:first-of-type { margin-top: 0.4em; }
.article-body { font-size: 1rem; }
.editor-note {
  margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--border); color: var(--text-secondary); font-size: .84rem;
}

/* TOC */
.toc-desktop { position: sticky; top: 90px; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 18px 20px; }
.toc-desktop .toc-title { font-weight: 800; font-size: .82rem; letter-spacing: .06em; color: var(--primary-dark); margin-bottom: 10px; }
.toc-desktop ol { list-style: none; margin: 0; padding: 0; counter-reset: toc; }
.toc-desktop li { margin-bottom: 8px; font-size: .86rem; }
.toc-desktop li.toc-l3 { padding-left: 14px; font-size: .82rem; }
.toc-desktop a { color: var(--text-secondary); }
.toc-desktop a:hover { color: var(--primary-dark); }
.toc-mobile { display: none; margin: 20px 0; border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; }
.toc-mobile summary {
  cursor: pointer; padding: 14px 16px; font-weight: 800; background: var(--card-tint); list-style: none; display: flex;
  align-items: center; gap: 8px;
}
.toc-mobile summary::-webkit-details-marker { display: none; }
.toc-mobile ol { list-style: none; margin: 0; padding: 12px 20px; }
.toc-mobile li { margin-bottom: 8px; font-size: .88rem; }

/* Sidebar */
.sidebar { display: flex; flex-direction: column; gap: 18px; }
.side-widget { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 18px; }
.side-widget h4 { margin: 0 0 12px; font-size: .84rem; letter-spacing: .05em; color: var(--primary-dark); display: flex; align-items: center; gap: 6px; }
.side-widget ul { list-style: none; margin: 0; padding: 0; }
.side-widget li { margin-bottom: 10px; }
.side-widget li a { font-size: .88rem; color: var(--text); font-weight: 600; }
.side-widget li a:hover { color: var(--primary-dark); }
.side-widget.side-risk { background: var(--warning-bg); border-color: var(--warning-border); }
.side-widget.side-risk h4 { color: var(--warning-text); }
.side-widget.side-risk li a { color: var(--warning-text); }

/* Next stop */
.next-stop { margin-top: 44px; padding-top: 28px; border-top: 1px dashed var(--border); }
.next-stop h3 { display: flex; align-items: center; gap: 8px; font-size: 1rem; }
.next-stop-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; list-style: none; padding: 0; margin: 14px 0 0; }
.next-stop-list li a {
  display: block; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 14px 16px; font-weight: 700; font-size: .9rem; color: var(--text);
}
.next-stop-list li a:hover { border-color: var(--primary-soft); background: var(--card-tint); text-decoration: none; }
.next-stop-list li a .arrow { color: var(--primary); margin-right: 4px; }

/* FAQ accordion */
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 4px 20px; }
.faq-item summary {
  cursor: pointer; padding: 16px 0; font-weight: 700; list-style: none; display: flex; justify-content: space-between; gap: 12px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; color: var(--primary-dark); font-size: 1.2rem; flex-shrink: 0; }
.faq-item[open] summary::after { content: "–"; }
.faq-item .faq-answer { padding: 0 0 18px; color: var(--text-secondary); }
.faq-cat-label { font-size: .78rem; font-weight: 800; letter-spacing: .08em; color: var(--primary-dark); text-transform: uppercase; margin: 30px 0 12px; }
.faq-cat-label:first-child { margin-top: 0; }

/* Compare table hero row */
.answer-box {
  background: var(--card); border: 2px solid var(--primary); border-radius: var(--radius-lg); padding: 20px 22px; margin-bottom: 26px;
}
.answer-box .qa-label { color: var(--primary-dark); font-weight: 800; font-size: .8rem; letter-spacing: .05em; margin-bottom: 8px; }

/* ---------- Review score / pros-cons ---------- */
.pros-cons { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin: 1.4em 0; }
.pros-cons:has(.box:only-child) { grid-template-columns: 1fr; }
.pros-cons .box { border-radius: var(--radius-md); padding: 18px 20px; border: 1px solid var(--border); }
.pros-cons .pros { background: #EFFAF0; border-color: var(--primary-soft); }
.pros-cons .cons { background: var(--warning-bg); border-color: var(--warning-border); }
.pros-cons h4 { margin: 0 0 10px; font-size: .92rem; }
.pros-cons ul { margin: 0; padding-left: 1.2em; }

/* ---------- Search ---------- */
.search-modal { position: fixed; inset: 0; background: rgba(38,50,56,.45); display: none; align-items: flex-start; justify-content: center; z-index: 200; padding: 10vh 20px; }
.search-modal.open { display: flex; }
.search-panel { background: var(--card); border-radius: var(--radius-lg); max-width: 620px; width: 100%; padding: 20px; box-shadow: var(--shadow-md); max-height: 70vh; display: flex; flex-direction: column; }
.search-panel input { width: 100%; padding: 14px 16px; border-radius: var(--radius-md); border: 1px solid var(--border); font-size: 1rem; background: var(--card-tint); }
.search-results { margin-top: 14px; overflow-y: auto; }
.search-results a { display: block; padding: 12px 10px; border-radius: var(--radius-sm); }
.search-results a:hover { background: var(--card-tint); text-decoration: none; }
.search-results .r-cat { font-size: .72rem; color: var(--primary-dark); font-weight: 800; }
.search-results .r-title { font-weight: 700; color: var(--text); }
.search-empty { color: var(--text-secondary); padding: 20px 10px; font-size: .9rem; }

/* ---------- Footer ---------- */
.site-footer { background: var(--text); color: #C7DCC8; margin-top: 60px; }
.site-footer .container { padding: 48px 24px 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 30px; }
.footer-brand { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 1.1rem; color: #fff; margin-bottom: 10px; }
.footer-desc { font-size: .86rem; color: #9FB7A2; max-width: 320px; }
.site-footer h5 { color: #E6F5E8; font-size: .82rem; letter-spacing: .06em; margin: 0 0 14px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 10px; }
.site-footer a { color: #A9C4AC; font-size: .88rem; }
.site-footer a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); margin-top: 34px; padding-top: 20px; font-size: .8rem; color: #8AA48D; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }

/* ---------- Utility ---------- */
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }

/* ---------- 404 ---------- */
.error-page { text-align: center; padding: 90px 0; }
.error-page .code { font-size: 4rem; font-weight: 800; color: var(--primary-soft); }

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 1024px) {
  .article-shell { grid-template-columns: 1fr; }
  .toc-desktop { display: none; }
  .toc-mobile { display: block; }
  .sidebar { flex-direction: row; flex-wrap: wrap; }
  .side-widget { flex: 1 1 260px; }
  .route-map { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .main-nav, .header-actions .btn { display: none; }
  .nav-toggle { display: inline-flex; }
  .card-grid { grid-template-columns: 1fr; }
  .pros-cons { grid-template-columns: 1fr; }
  .next-stop-list { grid-template-columns: 1fr; }
  .info-board dl { grid-template-columns: 110px 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero { padding: 36px 0 10px; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .container { padding: 0 16px; }
  .route-line .route-label { margin-bottom: 8px; }
}