/* =========================================================
   变量 & 基础
   ========================================================= */
:root{
  --paper:#f5f3ee;
  --surface:#ffffff;
  --ink:#1c1b18;
  --ink-2:#6f6960;
  --ink-3:#a8a195;
  --line:#e5e0d6;
  --accent:#b04a2f;
  --radius:14px;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",Georgia,serif;
  --ease-out: cubic-bezier(.22, 1, .36, 1);
}

*{ box-sizing:border-box; }
[hidden]{ display:none !important; }

html,body{ height:100%; margin:0; }

body{
  background:var(--paper);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
  font-size:14px;
  -webkit-tap-highlight-color:transparent;
}

button{ font-family:inherit; cursor:pointer; }
input{ font-family:inherit; }

/* =========================================================
   入口
   ========================================================= */
.gate{
  position:fixed; inset:0; z-index:100;
  display:grid; place-items:center;
  background:var(--paper);
  cursor:pointer;
  user-select:none;
  transition:opacity .65s ease, visibility .65s ease;
}
.gate.hide{ opacity:0; visibility:hidden; pointer-events:none; }

.gate-text{
  font-family:var(--serif);
  font-size:clamp(40px, 12.5vw, 148px);
  font-weight:400;
  letter-spacing:.26em;
  text-indent:.26em;
  line-height:1;
  color:var(--ink);
  transition:opacity .3s ease;
}


/* =========================================================
   主框架
   ========================================================= */
.app{
  display:flex;
  flex-direction:column;
  min-height:100vh;
  min-height:100dvh;
  opacity:0;
  transition:opacity .65s ease;
}
.app.show{ opacity:1; }

/* =========================================================
   抬头
   ========================================================= */
.topbar{
  flex:none;
  display:flex;
  justify-content:center;
  align-items:center;
  padding:26px 24px 0;
}

.brand{
  font-family:var(--serif);
  font-size:26px;
  font-weight:600;
  letter-spacing:.32em;
  text-indent:.32em;
  color:var(--ink);
  user-select:none;
  cursor:pointer;
}

/* =========================================================
   舞台
   ========================================================= */
.stage{
  flex:1;
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:26px;
  padding:32px 28px 20px;
  min-height:0;
}

.stage-inner{
  display:flex;
  align-items:center;
  gap:20px;
  width:100%;
  max-width:1100px;
  margin:0 auto;
}

.nav-btn{
  flex:none;
  width:44px; height:44px;
  display:grid; place-items:center;
  border:1px solid var(--line);
  border-radius:50%;
  background:var(--surface);
  color:var(--ink-2);
  font-size:20px;
  line-height:1;
  padding-bottom:2px;
  transition:background .25s ease, color .25s ease,
             border-color .25s ease, transform .15s ease,
             opacity .35s ease;
}
.nav-btn:hover:not(:disabled){
  background:var(--ink); border-color:var(--ink); color:#fff;
}
.nav-btn:active:not(:disabled){ transform:scale(.94); }
.nav-btn:disabled{ opacity:.25; cursor:default; }

.stage.expanded .nav-btn{ opacity:0; pointer-events:none; }

/* ---------- 卡片容器 ---------- */
.cards-wrap{ flex:1; min-width:0; }

.cards{
  display:flex;
  justify-content:center;
  align-items:flex-start;
  gap:20px;
  width:100%;
  max-width:1060px;
  margin:0 auto;
  transition: gap .7s var(--ease-out), max-width .7s var(--ease-out);
}

.cards.has-expanded{ gap:0; max-width:840px; }

/* =========================================================
   卡片
   ========================================================= */
.card{
  position:relative;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  cursor:pointer;
  outline:none;
  flex:1 1 0;
  min-width:0;
  max-width:340px;
  opacity:1;
  transform:none;
  box-shadow:0 0 0 rgba(28,27,24,0);
  transition:
    flex-grow     .7s var(--ease-out),
    max-width     .7s var(--ease-out),
    opacity       .4s ease,
    transform     .5s var(--ease-out),
    box-shadow    .4s ease,
    border-color  .4s ease;
}

.card:hover{
  transform:translateY(-3px);
  box-shadow:0 12px 26px rgba(28,27,24,.09);
}
.card:focus-visible{ box-shadow:0 0 0 3px rgba(176,74,47,.25); }

.cards.has-expanded .card{
  flex-grow:0;
  max-width:0;
  opacity:0;
  pointer-events:none;
  transform:scale(.96);
  box-shadow:none;
  border-color:transparent;
}

.cards.has-expanded .card.expanded{
  flex-grow:1;
  max-width:780px;
  opacity:1;
  pointer-events:auto;
  transform:none;
  cursor:default;
  box-shadow:0 18px 44px rgba(28,27,24,.10);
  border-color:var(--line);
}

.card.expanded:hover{
  transform:none;
  box-shadow:0 18px 44px rgba(28,27,24,.10);
}

/* ---------- 封面 ---------- */
.card-cover{
  height:180px;
  background-size:cover;
  background-position:center;
  background-color:#ece8e0;
  transition:height .7s var(--ease-out);
}
.card.expanded .card-cover{ height:210px; }

/* ---------- 正文 ---------- */
.card-body{
  padding:14px 16px 16px;
  transition:padding .7s var(--ease-out);
}
.card.expanded .card-body{ padding:16px 22px 8px; }

.card-date{
  font-size:14px;
  font-weight:500;
  letter-spacing:.06em;
  color:var(--ink-2);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum";
  transition:font-size .7s var(--ease-out), letter-spacing .7s var(--ease-out);
}
.card.expanded .card-date{
  font-size:15px;
  letter-spacing:.08em;
  color:var(--ink-3);
}

.card-title{
  font-family:var(--serif);
  font-size:15px;
  font-weight:600;
  line-height:1.5;
  margin:8px 0 12px;
  min-height:3em;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  transition:font-size .7s var(--ease-out),
             margin .7s var(--ease-out),
             min-height .7s var(--ease-out);
}
.card.expanded .card-title{
  font-size:23px;
  line-height:1.4;
  min-height:0;
  -webkit-line-clamp:unset;
  display:block;
  margin:8px 0 14px;
}

.card-tags{ display:flex; flex-wrap:wrap; gap:5px; }

.tag{
  font-size:11px;
  line-height:1.65;
  color:var(--ink-2);
  background:var(--paper);
  border:1px solid var(--line);
  padding:1px 8px;
  border-radius:99px;
  white-space:nowrap;
}

/* ---------- 详情：grid 行高从 0 到 auto 平滑展开 ---------- */
.card-detail{
  display:grid;
  grid-template-rows:0fr;
  transition:grid-template-rows .7s var(--ease-out);
}
.card.expanded .card-detail{ grid-template-rows:1fr; }

.card-detail-inner{
  overflow:hidden;
  min-height:0;
  padding:0 22px;
  opacity:0;
  transform:translateY(8px);
  transition:opacity .3s ease, transform .4s var(--ease-out);
}
.card.expanded .card-detail-inner{
  opacity:1;
  transform:none;
  transition:opacity .5s ease .28s, transform .5s var(--ease-out) .28s;
}

.card-summary{
  font-size:13.5px;
  line-height:2;
  color:#3d3a34;
  margin:0 0 22px;
  white-space:pre-wrap;
}

/* ---------- 「进入」按钮 ---------- */
.btn-enter{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:20px 16px;
  margin-bottom:22px;
  border:0;
  border-radius:12px;
  background:var(--ink);
  color:#fff;
  transition:background .25s ease;
}
.btn-enter:hover{ background:#000; }
.btn-enter:active{ transform:scale(.985); }

.btn-date{
  font-size:30px;
  font-weight:600;
  line-height:1;
  letter-spacing:.05em;
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum";
}

.btn-label{
  font-size:15px;
  font-weight:500;
  line-height:1;
  letter-spacing:.32em;
  text-indent:.32em;
  opacity:.92;
}

/* ---------- 关闭按钮 ---------- */
.card-close{
  position:absolute;
  top:12px; right:12px;
  width:34px; height:34px;
  display:grid; place-items:center;
  border:0;
  border-radius:50%;
  background:rgba(255,255,255,.92);
  color:var(--ink-2);
  font-size:14px;
  line-height:1;
  box-shadow:0 2px 8px rgba(0,0,0,.12);
  z-index:2;
  opacity:0;
  pointer-events:none;
  transform:scale(.85);
  transition:background .2s ease, color .2s ease,
             transform .2s ease, opacity .2s ease;
}
.card.expanded .card-close{
  opacity:1;
  pointer-events:auto;
  transform:scale(1);
  transition:background .2s ease, color .2s ease,
             transform .2s ease, opacity .3s ease .3s;
}
.card-close:hover{ background:#fff; color:var(--ink); }
.card-close:active{ transform:scale(.9); }

/* ---------- 翻页圆点 ---------- */
.pager{
  display:flex;
  justify-content:center;
  align-items:center;
  gap:8px;
  min-height:7px;
  transition:opacity .35s ease;
}
.stage.expanded .pager{ opacity:0; pointer-events:none; }

.dot{
  width:7px; height:7px;
  padding:0; border:0;
  border-radius:50%;
  background:var(--line);
  transition:background .2s ease, transform .2s ease;
}
.dot:hover{ background:var(--ink-3); }
.dot.active{ background:var(--ink); transform:scale(1.28); }

.empty{
  text-align:center;
  color:var(--ink-3);
  font-size:13px;
  padding:60px 0;
}

/* =========================================================
   底部栏：排序在上，搜索在下
   ========================================================= */
.bottom-bar{
  flex:none;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:12px;
  padding:16px 24px 32px;
}

.seg{
  display:inline-flex;
  padding:3px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:9px;
}
.seg-btn{
  border:0; background:transparent;
  padding:6px 16px;
  border-radius:6px;
  font-size:13px;
  color:var(--ink-2);
  transition:background .2s ease, color .2s ease;
}
.seg-btn:hover{ color:var(--ink); }
.seg-btn.active{ background:var(--ink); color:#fff; }

.search-wrap{ width:100%; max-width:300px; }

.search{
  text-align: center;
  width:100%;
  padding:10px 14px;
  border:1px solid var(--line);
  border-radius:9px;
  background:var(--surface);
  font-size:14px;
  color:var(--ink);
  outline:none;
  transition:border-color .2s ease, box-shadow .2s ease;
}
.search::placeholder{ color:var(--ink-3);}
.search:focus{
  border-color:var(--ink-3);
  box-shadow:0 0 0 3px rgba(28,27,24,.06);
}

/* ---------- toast ---------- */
.toast{
  position:fixed;
  left:50%; bottom:34px;
  transform:translate(-50%,16px);
  padding:11px 20px;
  border-radius:10px;
  background:var(--ink);
  color:#fff;
  font-size:13px;
  opacity:0;
  pointer-events:none;
  transition:opacity .25s ease, transform .25s ease;
  z-index:200;
  max-width:80vw;
  text-align:center;
}
.toast.show{ opacity:1; transform:translate(-50%,0); }

/* =========================================================
   响应式：窄屏每页只显示 1 张卡片
   ========================================================= */
@media (max-width:700px){

  .topbar{ padding:18px 16px 0; }
  .brand{ font-size:20px; letter-spacing:.28em; text-indent:.28em; }

  .stage{ padding:20px 16px 10px; gap:18px; }
  .stage-inner{ gap:10px; }

  .nav-btn{ width:38px; height:38px; font-size:18px; }

  .card-cover{ height:170px; }
  .card.expanded .card-cover{ height:180px; }

  .card-body{ padding:14px 16px 16px; }
  .card.expanded .card-body{ padding:15px 18px 6px; }

  .card-date{ font-size:15px; }
  .card.expanded .card-date{ font-size:15px; }

  .card-title{ font-size:16px; margin:8px 0 12px; }
  .card.expanded .card-title{ font-size:20px; }

  .card-detail-inner{ padding:0 18px; }
  .card-summary{ font-size:13.5px; line-height:1.95; }

  .btn-enter{ padding:18px 14px; margin-bottom:18px; }
  .btn-label{ font-size:14px; letter-spacing:.28em; text-indent:.28em; }

  .bottom-bar{ padding:12px 16px 26px; }
}

@media (max-width:380px){
  .card-date{ font-size:14px; }
  .card-title{ font-size:15px; }
  .nav-btn{ width:34px; height:34px; font-size:16px; }
}