/* ============================================================
   What to Buy in China — P0 design system
   "International travel magazine + curated shopping guide"
   Mobile-first. No external assets. Design tokens per Spec §4.
   ============================================================ */

:root {
  /* color */
  --bg: #FAF8F3;
  --card: #FFFFFF;
  --ink: #183C34;
  --muted: #64716C;
  --accent: #AF462F;
  --accent-dark: #8E3725;
  --line: #DEDCD3;
  --wash: #EDF1EB;
  --btn-text: #FFFFFF;

  /* radius */
  --r-card: 12px;
  --r-panel: 16px;
  --r-ctrl: 8px;

  /* type */
  --font-serif: Georgia, "Times New Roman", "Songti SC", "SimSun", serif;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial,
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;

  /* layout */
  --maxw: 1200px;
  --narrow: 720px;

  --shadow-sm: 0 1px 2px rgba(24, 60, 52, 0.07);
  --shadow-md: 0 4px 16px rgba(24, 60, 52, 0.09);
}

/* ---------- reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.25;
  margin: 0 0 16px;
  color: var(--ink);
  text-wrap: balance;
}
h1 { font-size: 2.125rem; }          /* 34px mobile */
h2 { font-size: 1.625rem; }         /* 26px mobile */
h3 { font-size: 1.25rem; }
p { margin: 0 0 16px; }

a { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }
a:hover { color: var(--accent); }

img { max-width: 100%; height: auto; display: block; }

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

::selection { background: var(--wash); }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}

.skip-link {
  position: absolute; left: 16px; top: -48px; z-index: 200;
  background: var(--ink); color: #fff; padding: 8px 16px;
  border-radius: var(--r-ctrl); text-decoration: none;
  transition: top 0.15s ease;
}
.skip-link:focus { top: 12px; color: #fff; }

.cn { font-weight: 400; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}
.container.narrow, .narrow { max-width: var(--narrow); margin-left: auto; margin-right: auto; }

@media (max-width: 360px) {
  .container { padding-left: 16px; padding-right: 16px; }
}

/* ---------- preview ribbon / toast ---------- */
.preview-ribbon {
  background: var(--accent); color: #fff; text-align: center;
  font-size: 0.8rem; font-weight: 700; letter-spacing: 0.08em;
  padding: 6px 12px; text-transform: uppercase;
}

.toast {
  position: fixed; left: 50%; bottom: 88px; transform: translateX(-50%);
  background: var(--ink); color: #fff; padding: 12px 20px;
  border-radius: var(--r-ctrl); font-size: 0.95rem; z-index: 300;
  box-shadow: var(--shadow-md); max-width: calc(100vw - 40px); text-align: center;
}

/* ---------- header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; min-height: 64px; padding-top: 8px; padding-bottom: 8px;
}
.logo { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; }
.logo-text {
  font-family: var(--font-serif); font-weight: 700; font-size: 1.1rem;
  color: var(--ink); line-height: 1.2;
}
.site-nav { display: none; }
.site-nav ul {
  list-style: none; margin: 0; padding: 0; display: flex; align-items: center; gap: 4px;
}
.site-nav a {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--ink); text-decoration: none; font-weight: 600; font-size: 0.95rem;
  padding: 10px 12px; border-radius: var(--r-ctrl); min-height: 44px;
}
.site-nav a:hover { background: var(--wash); color: var(--ink); }
.nav-label { display: none; }
.list-link { position: relative; }
.list-count {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 22px; height: 22px; padding: 0 6px;
  background: var(--accent); color: #fff; font-size: 0.75rem; font-weight: 700;
  border-radius: 999px; line-height: 1;
}
.menu-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border: 1px solid var(--line);
  background: var(--card); border-radius: var(--r-ctrl); cursor: pointer; color: var(--ink);
}
.mobile-menu {
  border-top: 1px solid var(--line); background: var(--card);
  padding: 8px 0 24px;
}
.mobile-menu ul { list-style: none; margin: 0 0 16px; padding: 0; }
.mobile-menu li { border-bottom: 1px solid var(--line); }
.mobile-menu li:last-child { border-bottom: none; }
.mobile-menu a {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 4px; text-decoration: none; font-weight: 600; font-size: 1.05rem; color: var(--ink);
}
.menu-close { width: 100%; }

@media (min-width: 900px) {
  .site-nav { display: block; }
  .nav-label { display: inline; }
  .menu-btn { display: none; }
  .mobile-menu { display: none !important; }
  .header-inner { min-height: 76px; }
  .logo-text { font-size: 1.25rem; }
}

/* ---------- breadcrumb ---------- */
.breadcrumb { padding: 20px 0 0; }
.breadcrumb ol {
  list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px;
  font-size: 0.9rem; color: var(--muted);
}
.breadcrumb li + li::before { content: "›"; margin-right: 8px; color: var(--muted); }
.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; color: var(--ink); }

/* ---------- hero ---------- */
.hero { padding: 48px 0; border-bottom: 1px solid var(--line); }
.hero-inner { display: grid; gap: 32px; }
.hero-copy h1 { font-size: 2.25rem; margin-bottom: 16px; }   /* 36px mobile */
.hero-sub { font-size: 1.1rem; color: var(--muted); max-width: 40ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0; }
.hero-search { display: flex; gap: 8px; max-width: 480px; }
.hero-search input {
  flex: 1; min-width: 0; padding: 12px 16px; font-size: 1rem; font-family: inherit;
  border: 1px solid var(--line); border-radius: var(--r-ctrl); background: var(--card); color: var(--ink);
}
.hero-media { margin: 0; }
.hero-img { border-radius: var(--r-panel); aspect-ratio: 16 / 10; width: 100%; object-fit: cover; }
.img-credit { font-size: 0.8rem; color: var(--muted); margin: 8px 0 0; }

@media (min-width: 900px) {
  .hero { padding: 64px 0; }
  .hero-inner { grid-template-columns: 1fr 1fr; align-items: center; }
  .hero-copy h1 { font-size: 3.5rem; }   /* 56px desktop */
}

/* ---------- sections ---------- */
.section { padding: 48px 0; }
.section-alt { background: var(--wash); }
.section-tight { padding: 32px 0; }
.section-head {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 16px; margin-bottom: 24px;
}
.section-head h2 { margin: 0; }

.page-head { padding: 24px 0 8px; }
.page-head h1 { margin-bottom: 12px; }
.page-lead { font-size: 1.1rem; color: var(--muted); max-width: 60ch; }
.tagline { font-size: 1.15rem; color: var(--muted); }

@media (min-width: 900px) {
  .section { padding: 64px 0; }
  h1 { font-size: 2.75rem; }   /* 44px desktop detail */
  h2 { font-size: 2rem; }      /* 32px desktop */
  .home-h1, .hero-copy h1 { font-size: 3.5rem; }
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 10px 20px;
  font-family: var(--font-sans); font-size: 1rem; font-weight: 600;
  border-radius: var(--r-ctrl); border: 2px solid transparent;
  cursor: pointer; text-decoration: none; line-height: 1.4;
  transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}
.btn-primary { background: var(--ink); color: var(--btn-text); border-color: var(--ink); }
.btn-primary:hover { background: #0F2A25; border-color: #0F2A25; color: #fff; }
.btn-accent { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-accent:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: #fff; }
.btn-outline { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn-outline:hover { background: var(--ink); color: #fff; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); color: var(--ink); }
.btn-lg { min-height: 52px; padding: 14px 28px; font-size: 1.05rem; }
.btn-sm { min-height: 44px; padding: 8px 14px; font-size: 0.9rem; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

.text-link { font-weight: 600; }
.link-btn {
  background: none; border: none; padding: 0; font: inherit;
  color: var(--ink); text-decoration: underline; text-underline-offset: 3px; cursor: pointer;
}
.link-btn:hover { color: var(--accent); }

.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }

/* ---------- cards ---------- */
.card-grid { display: grid; gap: 24px; grid-template-columns: 1fr; }
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--r-card); overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
  display: flex; flex-direction: column;
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card-media { display: block; }
.card-img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.city-card .card-img { aspect-ratio: 3 / 2; }
.card-body { padding: 20px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.card-kicker {
  font-size: 0.8rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--accent); margin: 0;
}
.card-title { font-size: 1.25rem; margin: 0; }
.card-title a { text-decoration: none; color: var(--ink); }
.card-title a:hover { color: var(--accent); }
.card-summary { color: var(--muted); margin: 0; font-size: 0.95rem; }
.card-price { font-weight: 700; margin: 0; }
.card-meta { font-size: 0.85rem; color: var(--muted); margin: 0; }
.card-actions { margin-top: auto; padding-top: 8px; }

@media (min-width: 640px) {
  .card-grid.cols-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 960px) {
  .card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
}

/* ---------- panels / figures ---------- */
.panel-figure { margin: 0 0 32px; }
.panel-img { border-radius: var(--r-panel); aspect-ratio: 16 / 10; width: 100%; object-fit: cover; }
.city-head { display: grid; gap: 24px; }
.city-head-media { margin: 0; }
@media (min-width: 900px) {
  .city-head { grid-template-columns: 1fr 1fr; align-items: center; }
}

/* ---------- prose ---------- */
.prose { line-height: 1.75; font-size: 1.05rem; }
.prose h2 { margin-top: 40px; }
.prose h3 { margin-top: 28px; }
.prose ul, .prose ol { padding-left: 24px; }
.prose li { margin-bottom: 8px; }
.prose img { border-radius: var(--r-panel); }

/* ---------- lists ---------- */
.check-list, .note-list, .cross-list { list-style: none; margin: 0 0 16px; padding: 0; }
.check-list li, .note-list li, .cross-list li {
  position: relative; padding-left: 32px; margin-bottom: 12px;
}
.check-list li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--wash); color: var(--ink);
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.85rem;
}
.cross-list li::before {
  content: "✕"; position: absolute; left: 0; top: 0;
  width: 24px; height: 24px; border-radius: 50%;
  background: #F5E6E0; color: var(--accent);
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.85rem;
}
.note-list li::before {
  content: "!"; position: absolute; left: 0; top: 0;
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--wash); color: var(--ink);
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.85rem;
}

/* ---------- buy detail ---------- */
.buy-head { display: grid; gap: 32px; padding: 24px 0 8px; }
.buy-head-media { margin: 0; }
@media (min-width: 900px) {
  .buy-head { grid-template-columns: 1.1fr 1fr; align-items: start; }
}
.meta-chips { list-style: none; margin: 0 0 16px; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-block; padding: 6px 14px; min-height: 44px; line-height: 30px;
  background: var(--wash); border-radius: 999px; text-decoration: none;
  font-size: 0.9rem; font-weight: 600; color: var(--ink);
}
.chip:hover { background: var(--line); color: var(--ink); }
.buy-actions-top { display: flex; flex-wrap: wrap; gap: 12px; margin: 20px 0; align-items: center; }
.share-row { display: inline-flex; flex-wrap: wrap; gap: 12px; }
.verdict { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-panel); padding: 24px; margin: 32px 0; }
.verdict-cols { display: grid; gap: 24px; }
@media (min-width: 700px) { .verdict-cols { grid-template-columns: 1fr 1fr; } }
.verdict h3 { font-size: 1.1rem; margin-bottom: 12px; }
.price-panel { background: var(--wash); border-radius: var(--r-panel); padding: 24px; margin: 32px 0; }
.price-big { font-family: var(--font-serif); font-size: 1.75rem; font-weight: 700; margin: 0 0 8px; }
.price-note { color: var(--muted); font-size: 0.95rem; margin: 0 0 8px; }
.buy-actions-bottom { padding: 32px 0; text-align: center; }

/* ---------- places ---------- */
.place-list { display: grid; gap: 24px; }
.place {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--r-card); padding: 24px;
}
.place-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 8px; }
.place-head h3 { margin: 0; font-size: 1.2rem; }
.place-note { color: var(--muted); }
.place-address {
  display: flex; flex-wrap: wrap; align-items: center; gap: 12px;
  background: var(--bg); border: 1px dashed var(--line); border-radius: var(--r-ctrl);
  padding: 12px 16px;
}
.addr-cn { font-size: 1.05rem; }
.place-meta { list-style: none; margin: 12px 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px 24px; font-size: 0.9rem; color: var(--muted); }
.place-meta .verified { color: var(--ink); font-weight: 600; }
.place-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 12px; }

.badge {
  display: inline-block; padding: 4px 12px; border-radius: 999px;
  font-size: 0.8rem; font-weight: 700; white-space: nowrap;
}
.badge-muted { background: var(--wash); color: var(--muted); }
.badge-accent { background: var(--accent); color: #fff; }

/* ---------- sources / verified ---------- */
.sources { border-top: 1px solid var(--line); margin-top: 48px; padding-top: 24px; }
.sources h2 { font-size: 1.25rem; }
.sources ul { padding-left: 20px; font-size: 0.95rem; color: var(--muted); }
.sources a { color: var(--ink); }
.verified-line { font-size: 0.9rem; color: var(--muted); border-top: 1px solid var(--line); padding-top: 16px; margin-top: 24px; }
.disclosure-note { font-size: 0.9rem; color: var(--muted); }
.link-list { list-style: none; margin: 0 0 16px; padding: 0; display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- filter bar ---------- */
.filter-bar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.filter-btn {
  min-height: 44px; padding: 8px 18px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--card); color: var(--ink);
  font-family: inherit; font-size: 0.95rem; font-weight: 600; cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}
.filter-btn:hover { border-color: var(--ink); }
.filter-btn.is-active { background: var(--ink); border-color: var(--ink); color: #fff; }
.empty-filter { color: var(--muted); }

/* ---------- search ---------- */
.search-form { display: flex; gap: 8px; margin: 24px 0; }
.search-form input {
  flex: 1; min-width: 0; padding: 12px 16px; font-size: 1rem; font-family: inherit;
  border: 1px solid var(--line); border-radius: var(--r-ctrl); background: var(--card); color: var(--ink);
}
.search-status { color: var(--muted); margin-bottom: 16px; }
.search-group { margin-bottom: 32px; }
.search-group h2 { font-size: 1.25rem; margin-bottom: 16px; }
.search-item { padding: 16px 0; border-bottom: 1px solid var(--line); }
.search-item h3 { margin: 0 0 4px; font-size: 1.15rem; }
.search-item h3 a { text-decoration: none; }
.search-item p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.search-item .type-tag {
  font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--accent); margin-right: 8px;
}
.search-explore { margin-top: 40px; }
.inline-links { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px 20px; }

/* ---------- my list ---------- */
.list-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0; }
.undo-bar { background: var(--wash); border-radius: var(--r-ctrl); padding: 12px 16px; margin-bottom: 16px; }
.undo-bar p { margin: 0; }
.list-group { margin-bottom: 32px; }
.list-group h2 { font-size: 1.25rem; margin-bottom: 16px; }
.list-item {
  display: grid; grid-template-columns: 72px 1fr auto; gap: 16px; align-items: center;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r-card);
  padding: 12px 16px 12px 12px; margin-bottom: 12px;
}
.list-thumb { width: 72px; height: 72px; object-fit: cover; border-radius: var(--r-ctrl); }
.list-item-body h3 { margin: 0 0 4px; font-size: 1.05rem; }
.list-item-body h3 a { text-decoration: none; }
.list-item-meta { font-size: 0.85rem; color: var(--muted); margin: 0; }
.list-item.unavailable { opacity: 0.75; }
.unavailable-note { color: var(--accent); font-weight: 600; font-size: 0.9rem; margin: 4px 0 0; }
.remove-btn {
  min-width: 44px; min-height: 44px; border: 1px solid var(--line); background: var(--card);
  border-radius: var(--r-ctrl); cursor: pointer; color: var(--muted); font-size: 1.1rem;
}
.remove-btn:hover { border-color: var(--accent); color: var(--accent); }
.empty-state { text-align: center; padding: 64px 0; }
.empty-state h2 { margin-bottom: 12px; }
.notice {
  border-left: 4px solid var(--accent); background: var(--card);
  padding: 16px 20px; border-radius: 0 var(--r-card) var(--r-card) 0; margin: 24px 0;
  border-top: 1px solid var(--line); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
}

/* ---------- consent ---------- */
.consent-banner {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 250;
  background: var(--card); border-top: 1px solid var(--line);
  box-shadow: 0 -4px 24px rgba(24, 60, 52, 0.12);
  padding: 20px 0 calc(20px + env(safe-area-inset-bottom));
}
.consent-inner { display: grid; gap: 16px; }
.consent-text p { margin: 0 0 8px; font-size: 0.95rem; }
.consent-text p:last-child { margin: 0; color: var(--muted); }
.consent-actions { display: flex; gap: 12px; flex-wrap: wrap; }
@media (min-width: 700px) {
  .consent-inner { grid-template-columns: 1fr auto; align-items: center; }
}

/* ---------- footer ---------- */
.site-footer { background: var(--ink); color: #D8DDD9; margin-top: 64px; padding: 48px 0 32px; }
.footer-grid { display: grid; gap: 32px; margin-bottom: 32px; }
.footer-tagline { font-size: 1.1rem; color: #fff; }
.footer-tagline strong { font-family: var(--font-serif); }
.footer-note { font-size: 0.9rem; color: #A9B3AC; max-width: 40ch; }
.footer-links { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 4px 24px; }
.footer-links a { color: #D8DDD9; text-decoration: none; display: inline-block; padding: 8px 0; min-height: 44px; font-size: 0.95rem; }
.footer-links a:hover { color: #fff; text-decoration: underline; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.15); padding-top: 24px; }
.footer-disclosure { font-size: 0.85rem; color: #A9B3AC; }
.footer-disclosure a { color: #D8DDD9; }
.footer-meta { font-size: 0.85rem; color: #A9B3AC; }
.footer-meta .link-btn { color: #D8DDD9; }
@media (min-width: 700px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

/* ---------- 404 ---------- */
.page-404 .kicker-404 {
  font-family: var(--font-serif); font-size: 4rem; font-weight: 700;
  color: var(--line); margin: 0;
}

/* ---------- tables (legacy tools) ---------- */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 24px 0; }
table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
th, td { border: 1px solid var(--line); padding: 12px; text-align: left; }
th { background: var(--wash); font-weight: 700; }

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}