/* ============ MASORIENTE — Yifang Crafts & Souvenir ============
   Design system derived from the exhibition booklet:
   paper #faf9f7 · ink #1a1a1a · accent red #d8000c · grays
   Serif display headings + sans body · single accent discipline  */

:root {
  --paper: #faf9f7;
  --paper-2: #f1efea;
  --ink: #1a1a1a;
  --ink-2: #2b2b2b;
  --muted: #6b6b6b;
  --line: #e3e0da;
  --accent: #d8000c;
  --accent-dark: #b5000a;
  --white: #ffffff;
  --serif: "Source Serif 4", "Source Han Serif SC", Georgia, "Songti SC", "SimSun", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --shadow-card: 0 2px 8px rgba(26,26,26,.08);
  --shadow-pop: 0 12px 40px rgba(26,26,26,.18);
  --radius: 8px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  font-size: 16px;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

/* ---------- typography ---------- */
h1, h2, h3, .serif { font-family: var(--serif); font-weight: 600; line-height: 1.15; }
.h-display { font-size: clamp(34px, 5vw, 56px); letter-spacing: -.01em; }
.h-section { font-size: clamp(26px, 3.4vw, 38px); letter-spacing: -.005em; }
.eyebrow {
  font-size: 12px; letter-spacing: .22em; text-transform: uppercase;
  color: var(--accent); font-weight: 600; margin-bottom: 14px;
}
.lead { color: var(--muted); font-size: clamp(16px, 1.6vw, 19px); max-width: 62ch; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 26px; border-radius: 6px; font-weight: 600; font-size: 15px;
  border: 1.5px solid transparent; transition: all .18s ease; white-space: nowrap;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-1px); }
.btn-ghost { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn-ghost:hover { background: var(--ink); color: #fff; }
.btn-ghost-light { border-color: rgba(255,255,255,.45); color: #fff; }
.btn-ghost-light:hover { border-color: #fff; background: rgba(255,255,255,.08); }
.btn .arr { transition: transform .18s ease; }
.btn:hover .arr { transform: translateX(3px); }

/* ---------- header ---------- */
.topbar {
  background: var(--ink); color: rgba(255,255,255,.82);
  font-size: 12.5px; padding: 7px 0;
}
.topbar .container { display: flex; justify-content: space-between; gap: 16px; }
.topbar a:hover { color: #fff; }
.topbar .tb-sep { margin: 0 10px; opacity: .35; }

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(250,249,247,.92); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 20px; }
.nav-logo { display: flex; align-items: center; gap: 12px; }
.nav-logo img { height: 42px; width: auto; }
.nav-logo .brand-name { font-family: var(--serif); font-weight: 700; font-size: 20px; letter-spacing: .04em; }
.nav-links { display: flex; align-items: center; gap: 28px; font-size: 14.5px; font-weight: 500; }
.nav-links a { color: var(--ink-2); padding: 6px 0; border-bottom: 2px solid transparent; transition: border-color .15s; }
.nav-links a:hover, .nav-links a.active { border-color: var(--accent); }
.nav-links .btn { padding: 9px 20px; }
.lang-switch {
  border: 1px solid var(--line); background: #fff; border-radius: 5px;
  font-size: 12.5px; font-weight: 600; padding: 6px 10px; color: var(--muted);
}
.lang-switch:hover { color: var(--ink); border-color: var(--ink); }

.burger { display: none; background: none; border: none; padding: 8px; }
.burger svg { display: block; }

@media (max-width: 920px) {
  .nav-links {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: stretch; padding: 12px 24px 20px; gap: 4px;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 4px; border-bottom: 1px solid var(--line); }
  .nav-links .btn { margin-top: 10px; justify-content: center; }
  .burger { display: block; }
  .topbar .hide-sm { display: none; }
}

/* ---------- hero ---------- */
.hero { padding: clamp(44px, 7vw, 90px) 0 clamp(40px, 6vw, 76px); overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(28px, 5vw, 72px); align-items: center; }
.hero-copy .btn-row { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.hero-facts { display: flex; gap: 34px; margin-top: 42px; flex-wrap: wrap; }
.hero-facts .fact b { display: block; font-family: var(--serif); font-size: 26px; color: var(--ink); }
.hero-facts .fact span { font-size: 12.5px; color: var(--muted); letter-spacing: .06em; text-transform: uppercase; }

.hero-visual { position: relative; }
.hero-visual .frame {
  background: #fff; border-radius: 10px; box-shadow: var(--shadow-pop);
  border: 1px solid var(--line); overflow: hidden; transform: rotate(1.2deg);
}
.hero-visual .frame img { width: 100%; }
.hero-badge {
  position: absolute; left: -14px; bottom: 34px;
  background: var(--accent); color: #fff; border-radius: 6px;
  padding: 10px 18px; font-size: 13px; font-weight: 600;
  box-shadow: 0 8px 24px rgba(216,0,12,.35); transform: rotate(-2deg);
}
@media (max-width: 920px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { max-width: 420px; }
}

/* ---------- sections ---------- */
.section { padding: clamp(52px, 8vw, 96px) 0; }
.section-head { margin-bottom: clamp(28px, 4vw, 48px); }
.section-head .lead { margin-top: 12px; }
.section-alt { background: var(--paper-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-dark { background: var(--ink); color: #fff; }
.section-dark .lead { color: rgba(255,255,255,.66); }

/* ---------- collections grid ---------- */
.collections-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
@media (max-width: 920px) { .collections-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .collections-grid { grid-template-columns: 1fr; } }
.col-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line); box-shadow: var(--shadow-card);
  transition: transform .2s ease, box-shadow .2s ease;
  display: flex; flex-direction: column;
}
.col-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-pop); }
.col-card .ph { position: relative; background: #eceae5; aspect-ratio: 3/3.6; overflow: hidden; }
.col-card .ph img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.col-card:hover .ph img { transform: scale(1.04); }
.col-card .ph .tag {
  position: absolute; top: 12px; left: 12px; background: var(--accent); color: #fff;
  font-size: 11px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
  padding: 4px 10px; border-radius: 4px;
}
.col-card .bd { padding: 20px 22px 22px; flex: 1; display: flex; flex-direction: column; }
.col-card .bd h3 { font-size: 21px; margin-bottom: 6px; }
.col-card .bd p { color: var(--muted); font-size: 14px; flex: 1; }
.col-card .bd .go {
  margin-top: 16px; font-size: 13.5px; font-weight: 600; color: var(--accent);
  display: inline-flex; align-items: center; gap: 6px;
}

/* ---------- spec strip ---------- */
.spec-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.spec-strip .cell { background: #fff; padding: 26px 24px; }
.spec-strip .cell b { display: block; font-family: var(--serif); font-size: 19px; margin-bottom: 4px; }
.spec-strip .cell span { color: var(--muted); font-size: 13.5px; }
@media (max-width: 920px) { .spec-strip { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .spec-strip { grid-template-columns: 1fr; } }

/* ---------- catalog banner ---------- */
.catalog-banner .inner {
  display: grid; grid-template-columns: 1.2fr .8fr; gap: clamp(28px, 5vw, 64px);
  align-items: center;
}
.qr-panel {
  background: #fff; border-radius: var(--radius); padding: 22px;
  display: flex; gap: 20px; align-items: center; box-shadow: var(--shadow-pop);
}
.qr-panel img { width: 150px; height: 150px; }
.qr-panel .qr-note { font-size: 13px; color: var(--muted); }
.qr-panel .qr-note b { display: block; color: var(--ink); font-size: 15px; margin-bottom: 4px; }
@media (max-width: 920px) { .catalog-banner .inner { grid-template-columns: 1fr; } }

/* ---------- about ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 5vw, 64px); align-items: start; }
.about-points { display: grid; gap: 18px; margin-top: 26px; }
.about-points .pt { display: flex; gap: 14px; }
.about-points .pt .n {
  font-family: var(--serif); color: var(--accent); font-size: 22px; font-weight: 700; min-width: 34px;
}
.about-points .pt b { display: block; font-size: 15.5px; }
.about-points .pt span { color: var(--muted); font-size: 14px; }
@media (max-width: 920px) { .about-grid { grid-template-columns: 1fr; } }

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(28px, 5vw, 64px); }
@media (max-width: 920px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-card {
  background: var(--ink); color: #fff; border-radius: var(--radius); padding: 32px;
}
.contact-card .person { display: flex; align-items: center; gap: 16px; margin-bottom: 24px; }
.contact-card .person .avatar {
  width: 54px; height: 54px; border-radius: 50%; background: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--serif); font-size: 22px; font-weight: 700;
}
.contact-card .person b { font-size: 19px; font-family: var(--serif); }
.contact-card .person span { color: rgba(255,255,255,.55); font-size: 13px; }
.contact-rows { display: grid; gap: 14px; }
.contact-rows a {
  display: flex; align-items: center; gap: 12px; padding: 13px 16px;
  background: rgba(255,255,255,.06); border-radius: 6px; font-size: 14.5px;
  transition: background .15s;
}
.contact-rows a:hover { background: rgba(255,255,255,.12); }
.contact-rows a svg { flex: none; }

.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(22px, 3vw, 34px); box-shadow: var(--shadow-card); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 560px) { .form-row { grid-template-columns: 1fr; } }
.form-card label { display: block; font-size: 13px; font-weight: 600; margin: 0 0 6px 2px; color: var(--ink-2); }
.form-card input, .form-card select, .form-card textarea {
  width: 100%; border: 1px solid var(--line); border-radius: 5px; padding: 11px 13px;
  font-size: 14.5px; font-family: inherit; background: var(--paper); color: var(--ink);
  transition: border-color .15s;
}
.form-card input:focus, .form-card select:focus, .form-card textarea:focus {
  outline: none; border-color: var(--accent);
}
.form-card .field { margin-bottom: 16px; }
.form-card .btn { width: 100%; margin-top: 6px; }
.form-note { font-size: 12.5px; color: var(--muted); margin-top: 12px; text-align: center; }

/* ---------- footer ---------- */
.site-footer { background: var(--ink); color: rgba(255,255,255,.6); padding: 56px 0 32px; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr; gap: 28px; } }
.site-footer img.footer-logo { height: 46px; margin-bottom: 16px; }
.site-footer h4 { color: #fff; font-size: 13px; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 14px; font-family: var(--sans); }
.site-footer a { display: block; padding: 3px 0; }
.site-footer a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding-top: 22px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 12.5px; }

/* ============ CATALOG VIEWER ============ */
body.catalog-body { background: #26241f; }

.cat-topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250,249,247,.97); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.cat-topbar .row { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 14px; }
.cat-brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.cat-brand img { height: 34px; }
.cat-brand .t { font-family: var(--serif); font-weight: 700; font-size: 16.5px; white-space: nowrap; }
.cat-brand .t small { display: block; font-family: var(--sans); font-weight: 500; font-size: 11px; color: var(--muted); letter-spacing: .12em; }
.cat-actions { display: flex; align-items: center; gap: 10px; }
.icon-btn {
  display: inline-flex; align-items: center; gap: 7px;
  background: #fff; border: 1px solid var(--line); border-radius: 6px;
  padding: 8px 13px; font-size: 13px; font-weight: 600; color: var(--ink-2);
  transition: all .15s;
}
.icon-btn:hover { border-color: var(--ink); }
.icon-btn.accent { background: var(--accent); border-color: var(--accent); color: #fff; }
.icon-btn.accent:hover { background: var(--accent-dark); }
@media (max-width: 700px) {
  .icon-btn .lbl { display: none; }
  .cat-brand .t { display: none; }
}

.cat-progress { height: 3px; background: rgba(255,255,255,.12); position: relative; }
.cat-progress .bar { height: 100%; background: var(--accent); width: 0; transition: width .25s ease; }

.viewer-stage {
  display: flex; align-items: center; justify-content: center;
  padding: 22px 14px 90px; position: relative; min-height: calc(100vh - 63px);
}
.page-holder {
  position: relative; background: #fff; border-radius: 4px; overflow: hidden;
  box-shadow: 0 18px 60px rgba(0,0,0,.5);
  max-width: min(760px, calc(100vw - 24px));
  width: 100%; aspect-ratio: 596/843;
  cursor: grab; touch-action: none;
}
.page-holder:active { cursor: grabbing; }
.page-holder img { width: 100%; height: 100%; object-fit: contain; user-select: none; -webkit-user-drag: none; }
.page-holder.zoomed { cursor: zoom-in; overflow: auto; touch-action: pan-x pan-y pinch-zoom; }
.page-holder.zoomed img { object-fit: none; min-width: 100%; min-height: 100%; }

.flip-btn {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 52px; height: 52px; border-radius: 50%;
  background: rgba(250,249,247,.95); border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 18px rgba(0,0,0,.28); z-index: 10; transition: all .15s;
}
.flip-btn:hover { background: var(--accent); border-color: var(--accent); }
.flip-btn:hover svg path { stroke: #fff; }
.flip-btn.prev { left: 14px; }
.flip-btn.next { right: 14px; }
.flip-btn svg path { stroke: var(--ink); transition: stroke .15s; }
@media (max-width: 700px) { .flip-btn { display: none; } }

.cat-bottom {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 40;
  background: rgba(250,249,247,.97); border-top: 1px solid var(--line);
  padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
}
.cat-bottom .row { display: flex; align-items: center; justify-content: center; gap: 16px; max-width: 760px; margin: 0 auto; }
.page-count { font-size: 13.5px; font-weight: 600; min-width: 72px; text-align: center; font-variant-numeric: tabular-nums; }
.page-count input {
  width: 52px; border: 1px solid var(--line); border-radius: 5px; text-align: center;
  padding: 5px 4px; font-size: 14px; font-weight: 600; font-family: inherit;
}
.page-count .of { color: var(--muted); font-weight: 500; }

.thumbs-panel {
  position: fixed; inset: auto 0 0 0; top: 63px; z-index: 45;
  background: rgba(250,249,247,.99); border-top: 1px solid var(--line);
  transform: translateY(105%); transition: transform .28s ease;
  overflow-y: auto; padding: 20px;
}
.thumbs-panel.open { transform: translateY(0); }
.thumbs-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(88px, 1fr)); gap: 12px; max-width: 980px; margin: 0 auto; }
.thumb {
  border: 2px solid transparent; border-radius: 5px; overflow: hidden; background: #fff;
  position: relative; transition: border-color .12s;
}
.thumb img { aspect-ratio: 596/843; object-fit: cover; width: 100%; }
.thumb:hover { border-color: var(--muted); }
.thumb.current { border-color: var(--accent); }
.thumb .num {
  position: absolute; bottom: 4px; right: 5px; font-size: 10px; font-weight: 700;
  background: rgba(26,26,26,.72); color: #fff; padding: 1px 5px; border-radius: 3px;
}

.swipe-hint {
  position: fixed; bottom: 74px; left: 50%; transform: translateX(-50%);
  background: rgba(26,26,26,.82); color: #fff; border-radius: 22px;
  padding: 8px 18px; font-size: 13px; z-index: 35; pointer-events: none;
  opacity: 1; transition: opacity .5s ease;
}
.swipe-hint.hide { opacity: 0; }