/* ===================================================================
   茶经 · 中国茶典  —  古朴典雅样式
   配色：宣纸 / 墨 / 朱砂 / 青瓷 / 金
   =================================================================== */

:root {
  --paper:      #f4ece0;
  --paper-2:    #efe4d2;
  --paper-3:    #e8dcc6;
  --ink:        #2c2620;
  --ink-soft:   #5d5246;
  --ink-faint:  #8a7c6b;
  --red:        #9e2b25;
  --red-deep:   #7c1f1a;
  --celadon:    #5f7d6e;
  --celadon-d:  #436054;
  --gold:       #b08d3e;
  --line:       rgba(44, 38, 32, 0.16);
  --line-soft:  rgba(44, 38, 32, 0.09);
  --shadow:     0 10px 30px rgba(44, 38, 32, 0.12);
  --serif:      "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", "宋体", serif;
  --brush:      "Ma Shan Zheng", "Noto Serif SC", "STKaiti", "KaiTi", serif;
  --maxw:       1180px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body { min-height: 100vh; position: relative; overflow-x: hidden; }

/* 宣纸纹理 */
.paper-grain {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(176,141,62,0.05) 0, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(95,125,110,0.05) 0, transparent 40%),
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix type='saturate' values='0'/></filter><rect width='120' height='120' filter='url(%23n)' opacity='0.03'/></svg>");
}

a { color: var(--red-deep); text-decoration: none; }
a:hover { color: var(--red); }

/* ---------------- Header ---------------- */
.site-header {
  position: sticky; top: 0; z-index: 30;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px;
  padding: 12px clamp(16px, 4vw, 40px);
  background: rgba(244, 236, 224, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-seal {
  width: 42px; height: 42px; display: grid; place-items: center;
  background: var(--red); color: #f7efe2; font-family: var(--brush);
  font-size: 26px; border-radius: 6px;
  box-shadow: inset 0 0 0 2px rgba(247,239,226,0.35);
  transform: rotate(-3deg);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font-size: 22px; letter-spacing: 4px; color: var(--ink); }
.brand-text em { font-style: normal; font-size: 12px; letter-spacing: 3px; color: var(--ink-faint); }

.site-nav { display: flex; gap: clamp(10px, 2.4vw, 30px); }
.site-nav a {
  color: var(--ink-soft); font-size: 17px; letter-spacing: 3px;
  padding: 6px 2px; position: relative; transition: color .2s;
}
.site-nav a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px;
  background: var(--red); transform: scaleX(0); transition: transform .25s; transform-origin: center;
}
.site-nav a:hover, .site-nav a.active { color: var(--red-deep); }
.site-nav a.active::after, .site-nav a:hover::after { transform: scaleX(1); }

.nav-toggle {
  display: none; background: none; border: 1px solid var(--line);
  color: var(--ink); font-size: 20px; width: 42px; height: 38px; border-radius: 6px; cursor: pointer;
}

/* ---------------- Layout ---------------- */
.app-view { position: relative; z-index: 1; max-width: var(--maxw); margin: 0 auto; padding: clamp(20px, 4vw, 48px) clamp(16px, 4vw, 40px) 60px; }

.section { margin-bottom: 56px; }
.section-head { display: flex; align-items: baseline; gap: 16px; margin-bottom: 22px; }
.section-head h2 { font-size: clamp(24px, 4vw, 32px); letter-spacing: 6px; margin: 0; font-weight: 600; color: var(--ink); }
.section-head .rule { flex: 1; height: 1px; background: linear-gradient(90deg, var(--line), transparent); }
.section-head .more { font-size: 14px; letter-spacing: 2px; color: var(--ink-faint); }

/* ---------------- Hero ---------------- */
.hero {
  position: relative; text-align: center; padding: clamp(36px, 8vw, 80px) 16px clamp(30px, 6vw, 60px);
  border: 1px solid var(--line); border-radius: 10px;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(176,141,62,0.10), transparent 60%),
    linear-gradient(180deg, var(--paper-2), var(--paper));
  overflow: hidden;
}
.hero .big-char {
  font-family: var(--brush); font-size: clamp(96px, 22vw, 200px); line-height: .9;
  color: var(--celadon-d); opacity: .9; margin: 0;
  text-shadow: 0 6px 18px rgba(67,96,84,0.25);
}
.hero h1 { font-size: clamp(26px, 5vw, 40px); letter-spacing: 10px; margin: 6px 0 4px; font-weight: 600; }
.hero .sub { color: var(--ink-soft); letter-spacing: 4px; font-size: 16px; }
.hero .poem { margin: 22px auto 0; max-width: 620px; color: var(--ink-soft); font-size: 17px; letter-spacing: 2px; }
.hero .poem .src { display: block; margin-top: 6px; font-size: 13px; color: var(--ink-faint); letter-spacing: 2px; }

.hero-search { margin: 26px auto 0; max-width: 520px; display: flex; gap: 0; }
.hero-search input {
  flex: 1; padding: 13px 16px; border: 1px solid var(--line); border-right: none;
  border-radius: 8px 0 0 8px; background: rgba(255,255,255,0.55); font-family: var(--serif);
  font-size: 16px; color: var(--ink); outline: none;
}
.hero-search input:focus { background: #fff; }
.hero-search button {
  padding: 0 22px; border: 1px solid var(--red); border-radius: 0 8px 8px 0;
  background: var(--red); color: #f7efe2; font-family: var(--serif); letter-spacing: 4px; cursor: pointer; font-size: 15px;
}
.hero-search button:hover { background: var(--red-deep); }

/* ---------------- Stat strip ---------------- */
.stat-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 30px; }
.stat {
  text-align: center; padding: 18px 8px; border: 1px solid var(--line);
  border-radius: 8px; background: rgba(255,255,255,0.35);
}
.stat b { display: block; font-size: 30px; color: var(--celadon-d); font-family: var(--brush); }
.stat span { font-size: 13px; letter-spacing: 2px; color: var(--ink-faint); }

/* ---------------- Cards grid ---------------- */
.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }

.tcard {
  position: relative; display: flex; flex-direction: column; gap: 8px;
  padding: 18px 18px 16px; border: 1px solid var(--line); border-radius: 10px;
  background: rgba(255,255,255,0.42); cursor: pointer; transition: transform .2s, box-shadow .2s, border-color .2s;
  overflow: hidden;
}
.tcard::before {
  content: ""; position: absolute; top: 10px; right: 10px; width: 30px; height: 30px;
  border: 1.5px solid var(--line); border-radius: 5px; opacity: .6; transform: rotate(4deg);
}
.tcard:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--celadon); }
.tcard .timg {
  width: 100%; height: 130px; object-fit: cover; border-radius: 8px;
  margin: -4px 0 2px; border: 1px solid var(--line); background: #f0e8d8;
}
.detail-img {
  flex: 0 0 auto; width: 240px; height: 160px; object-fit: cover;
  border-radius: 10px; border: 1px solid var(--line);
  box-shadow: var(--shadow); background: #f0e8d8;
}
@media (max-width: 600px){ .detail-img { width: 100%; height: 180px; } }
.tcard .tcat {
  align-self: flex-start; font-size: 12px; letter-spacing: 2px; color: #fff; background: var(--celadon);
  padding: 2px 10px; border-radius: 20px;
}
.tcard h3 { margin: 2px 0 0; font-size: 22px; letter-spacing: 2px; color: var(--ink); }
.tcard .ten { font-size: 12px; color: var(--ink-faint); letter-spacing: 1px; }
.tcard .tregion { font-size: 13px; color: var(--ink-soft); letter-spacing: 1px; }
.tcard .tflav { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.tag {
  font-size: 12px; padding: 2px 9px; border-radius: 20px; border: 1px solid var(--line);
  background: rgba(176,141,62,0.10); color: var(--ink-soft); letter-spacing: 1px;
}
.dot { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; color: var(--ink-faint); letter-spacing: 1px; }
.dot i { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }

/* ---------------- Category cards ---------------- */
.cat-grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.cat-card {
  border: 1px solid var(--line); border-radius: 10px; padding: 22px 20px; cursor: pointer;
  background: linear-gradient(160deg, rgba(255,255,255,0.5), rgba(232,220,198,0.4));
  transition: transform .2s, box-shadow .2s; position: relative; overflow: hidden;
}
.cat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.cat-card .cname { font-size: 26px; letter-spacing: 4px; margin: 0 0 4px; }
.cat-card .ccount { font-size: 13px; color: var(--ink-faint); letter-spacing: 2px; }
.cat-card .cdesc { font-size: 14px; color: var(--ink-soft); margin-top: 10px; min-height: 44px; }
.cat-card .cseal {
  position: absolute; right: -8px; bottom: -8px; font-family: var(--brush); font-size: 64px;
  color: rgba(95,125,110,0.14);
}

/* ---------------- Controls (search/filter) ---------------- */
.controls { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin-bottom: 24px; }
.search-box { flex: 1 1 260px; display: flex; }
.search-box input {
  flex: 1; padding: 11px 14px; border: 1px solid var(--line); border-radius: 8px;
  background: rgba(255,255,255,0.5); font-family: var(--serif); font-size: 15px; color: var(--ink); outline: none;
}
.search-box input:focus { border-color: var(--celadon); background: #fff; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-size: 14px; letter-spacing: 1px; padding: 6px 14px; border-radius: 20px;
  border: 1px solid var(--line); background: rgba(255,255,255,0.4); color: var(--ink-soft); cursor: pointer;
  transition: all .18s; user-select: none;
}
.chip:hover { border-color: var(--celadon); }
.chip.active { background: var(--celadon); color: #fff; border-color: var(--celadon); }
.result-count { font-size: 13px; color: var(--ink-faint); letter-spacing: 1px; }

/* ---------------- Tea detail ---------------- */
.detail-back { font-size: 14px; letter-spacing: 2px; color: var(--ink-faint); cursor: pointer; display: inline-block; margin-bottom: 18px; }
.detail-back:hover { color: var(--red); }
.detail-head { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 18px; padding-bottom: 18px; border-bottom: 1px solid var(--line); margin-bottom: 24px; }
.detail-seal {
  font-family: var(--brush); font-size: 56px; color: #f7efe2; background: var(--red);
  width: 92px; height: 92px; display: grid; place-items: center; border-radius: 10px;
  box-shadow: inset 0 0 0 3px rgba(247,239,226,0.3); transform: rotate(-3deg); flex: none;
}
.detail-title h1 { margin: 0; font-size: clamp(30px, 6vw, 44px); letter-spacing: 4px; }
.detail-title .en { color: var(--ink-faint); font-size: 15px; letter-spacing: 2px; }

.meta-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; margin-bottom: 28px; }
.meta-cell { background: rgba(255,255,255,0.5); padding: 14px 16px; }
.meta-cell .k { font-size: 12px; letter-spacing: 2px; color: var(--ink-faint); }
.meta-cell .v { font-size: 18px; color: var(--ink); margin-top: 3px; }

.detail-body { display: grid; grid-template-columns: 1.4fr 1fr; gap: 34px; }
@media (max-width: 820px){ .detail-body { grid-template-columns: 1fr; } }

.block { margin-bottom: 30px; }
.block h3 { font-size: 21px; letter-spacing: 4px; margin: 0 0 12px; padding-left: 12px; border-left: 4px solid var(--red); }
.block p { margin: 0 0 12px; color: var(--ink-soft); text-align: justify; }
.block .flavors { display: flex; flex-wrap: wrap; gap: 8px; }

.brew-table { width: 100%; border-collapse: collapse; }
.brew-table td { padding: 11px 12px; border-bottom: 1px dashed var(--line); vertical-align: top; }
.brew-table td:first-child { width: 92px; color: var(--ink-faint); font-size: 14px; letter-spacing: 2px; }
.brew-table td:last-child { color: var(--ink); }

.similar-list { display: flex; flex-direction: column; gap: 10px; }
.similar-item { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 10px 14px; border: 1px solid var(--line); border-radius: 8px; background: rgba(255,255,255,0.4); cursor: pointer; transition: .18s; }
.similar-item:hover { border-color: var(--celadon); transform: translateX(3px); }
.similar-item .nm { font-size: 17px; letter-spacing: 1px; }
.similar-item .ct { font-size: 12px; color: var(--ink-faint); }

/* ---------------- Culture ---------------- */
.culture-grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.culture-card {
  border: 1px solid var(--line); border-radius: 10px; padding: 22px; cursor: pointer;
  background: linear-gradient(155deg, rgba(255,255,255,0.5), rgba(232,220,198,0.35));
  transition: transform .2s, box-shadow .2s;
}
.culture-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.culture-card .ctitle { font-size: 23px; letter-spacing: 3px; margin: 0 0 6px; }
.culture-card .csub { font-size: 13px; color: var(--ink-faint); letter-spacing: 2px; margin-bottom: 10px; }
.culture-card .cex { font-size: 14px; color: var(--ink-soft); }

.article { max-width: 760px; margin: 0 auto; }
.article h1 { font-size: clamp(28px, 6vw, 40px); letter-spacing: 6px; text-align: center; margin: 0 0 6px; }
.article .asub { text-align: center; color: var(--ink-faint); letter-spacing: 3px; font-size: 14px; margin-bottom: 28px; }
.article h3 { font-size: 22px; letter-spacing: 3px; margin: 30px 0 10px; padding-left: 12px; border-left: 4px solid var(--celadon); }
.article p { text-align: justify; color: var(--ink-soft); margin: 0 0 14px; }
.article .pull {
  margin: 26px auto; padding: 18px 24px; border-left: 4px solid var(--red); border-right: 4px solid var(--red);
  background: rgba(176,141,62,0.08); font-family: var(--brush); font-size: 22px; letter-spacing: 3px; text-align: center; color: var(--ink);
}
.timeline { border-left: 2px solid var(--line); margin-left: 8px; padding-left: 22px; }
.timeline li { position: relative; margin-bottom: 18px; list-style: none; }
.timeline li::before { content: ""; position: absolute; left: -29px; top: 8px; width: 12px; height: 12px; background: var(--celadon); border-radius: 50%; box-shadow: 0 0 0 3px var(--paper); }
.timeline b { color: var(--ink); letter-spacing: 1px; }
.timeline span { color: var(--ink-soft); display: block; font-size: 15px; }

/* ---------------- Advisor ---------------- */
.advisor { max-width: 760px; margin: 0 auto; }
.advisor .q { margin-bottom: 26px; }
.advisor .q h3 { font-size: 20px; letter-spacing: 2px; margin: 0 0 12px; }
.advisor .opts { display: flex; flex-wrap: wrap; gap: 10px; }
.opt {
  padding: 10px 18px; border: 1px solid var(--line); border-radius: 24px; cursor: pointer;
  background: rgba(255,255,255,0.45); letter-spacing: 1px; transition: .18s; font-size: 15px;
}
.opt:hover { border-color: var(--celadon); }
.opt.active { background: var(--red); color: #fff; border-color: var(--red); }
.advisor-actions { display: flex; gap: 12px; margin-top: 28px; }
.btn {
  padding: 12px 26px; border-radius: 8px; border: 1px solid var(--red); background: var(--red); color: #f7efe2;
  font-family: var(--serif); letter-spacing: 3px; cursor: pointer; font-size: 16px;
}
.btn:hover { background: var(--red-deep); }
.btn.ghost { background: transparent; color: var(--ink-soft); border-color: var(--line); }
.btn.ghost:hover { border-color: var(--celadon); color: var(--celadon-d); }
.advisor-result { margin-top: 30px; }

/* ---------------- Footer ---------------- */
.site-footer { position: relative; z-index: 1; text-align: center; padding: 40px 20px 50px; border-top: 1px solid var(--line); margin-top: 40px; }
.footer-seal { font-family: var(--brush); font-size: 46px; color: var(--red); opacity: .85; margin-bottom: 8px; }
.footer-poem { color: var(--ink-soft); letter-spacing: 3px; margin: 0 0 12px; }
.footer-note { color: var(--ink-faint); font-size: 13px; letter-spacing: 1px; max-width: 560px; margin: 0 auto; line-height: 1.7; }

/* ---------------- Responsive ---------------- */
@media (max-width: 720px){
  body { font-size: 16px; }
  .site-nav { position: fixed; top: 62px; left: 0; right: 0; flex-direction: column; gap: 0;
    background: var(--paper-2); border-bottom: 1px solid var(--line); padding: 6px 0;
    transform: translateY(-130%); transition: transform .28s; box-shadow: var(--shadow); }
  .site-nav.open { transform: translateY(0); }
  .site-nav a { padding: 12px 22px; letter-spacing: 4px; }
  .site-nav a::after { display: none; }
  .nav-toggle { display: block; }
  .stat-strip { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 420px){
  .grid, .cat-grid, .culture-grid { grid-template-columns: 1fr; }
}

/* 进场动画 */
.fade-in { animation: fade .4s ease both; }
@keyframes fade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.empty { text-align: center; color: var(--ink-faint); padding: 50px 0; letter-spacing: 2px; }