/* ============================================================
   诗云 · 古诗词学习与检索
   设计：宣纸 / 墨 / 朱砂。无框架，纯 CSS。
   ============================================================ */

:root {
  --paper:      #f6f2e9;
  --paper-2:    #fffdf7;
  --paper-3:    #efeade;
  --ink:        #211d18;
  --ink-2:      #57503f;
  --ink-3:      #8e8676;
  --ink-4:      #b6ad9b;
  --line:       #e2dbcb;
  --line-2:     #d3cab6;
  --seal:       #a6332b;
  --seal-soft:  #f3e3e0;
  --jade:       #3f6555;
  --jade-soft:  #e3ece7;
  --gold:       #a8842f;

  --side-w: 248px;
  --read-w: 720px;
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 18px;

  --shadow-sm: 0 1px 2px rgba(60, 48, 30, .06), 0 2px 8px rgba(60, 48, 30, .04);
  --shadow-md: 0 2px 6px rgba(60, 48, 30, .07), 0 12px 28px rgba(60, 48, 30, .07);

  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --serif: "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", "STZhongsong",
           "SimSun", "Songti TC", Georgia, serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper:     #171512;
    --paper-2:   #1f1c18;
    --paper-3:   #262219;
    --ink:       #ece5d8;
    --ink-2:     #bdb4a3;
    --ink-3:     #8b8375;
    --ink-4:     #635c50;
    --line:      #332e26;
    --line-2:    #454034;
    --seal:      #d4635a;
    --seal-soft: #34211f;
    --jade:      #7fae98;
    --jade-soft: #1e2a25;
    --gold:      #c9a44e;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, .45);
  }
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body { height: 100%; }

body {
  margin: 0;
  font: 15px/1.7 var(--sans);
  color: var(--ink);
  background: var(--paper);
  background-image:
    radial-gradient(circle at 18% 12%, rgba(168, 132, 47, .045), transparent 42%),
    radial-gradient(circle at 82% 78%, rgba(166, 51, 43, .035), transparent 46%);
  -webkit-font-smoothing: antialiased;
  overscroll-behavior-y: none;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
input { font: inherit; color: inherit; }
mark { background: none; color: var(--seal); font-weight: 600; }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--line-2); border-radius: 4px; }
::-webkit-scrollbar-track { background: transparent; }

/* ============================ 骨架 ============================ */

.shell { display: flex; min-height: 100%; }

.side {
  position: fixed; inset: 0 auto 0 0; width: var(--side-w);
  display: flex; flex-direction: column; gap: 4px;
  padding: 26px 18px 18px;
  border-right: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,.5), transparent 40%);
  overflow-y: auto;
}
@media (prefers-color-scheme: dark) {
  .side { background: linear-gradient(180deg, rgba(255,255,255,.025), transparent 40%); }
}

.main {
  flex: 1; min-width: 0; margin-left: var(--side-w);
  display: flex; flex-direction: column;
}

/* ============================ 品牌 ============================ */

.brand { display: flex; align-items: center; gap: 11px; padding: 0 4px 18px; }

.brand-mark {
  width: 38px; height: 38px; flex: none;
  display: grid; place-items: center;
  font: 600 20px/1 var(--serif);
  color: #fffdf7; background: var(--seal);
  border-radius: 7px;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.18), 0 3px 10px rgba(166,51,43,.28);
}
.brand-txt { display: flex; flex-direction: column; line-height: 1.15; }
.brand-txt b { font: 600 19px/1.2 var(--serif); letter-spacing: .14em; }
.brand-txt i { font-style: normal; font-size: 11px; color: var(--ink-3); letter-spacing: .18em; margin-top: 3px; }

/* ============================ 侧栏检索 ============================ */

.side-search {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px; margin-bottom: 14px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  transition: border-color .16s, box-shadow .16s;
}
.side-search:focus-within { border-color: var(--ink-4); box-shadow: 0 0 0 3px rgba(166,51,43,.07); }
.side-search svg { width: 16px; height: 16px; fill: none; stroke: var(--ink-3); stroke-width: 1.9; flex: none; }
.side-search input { flex: 1; min-width: 0; border: 0; outline: 0; background: none; font-size: 13.5px; }
.side-search input::placeholder { color: var(--ink-4); }
.side-search kbd {
  font: 11px/1 var(--sans); color: var(--ink-4);
  border: 1px solid var(--line); border-radius: 4px; padding: 3px 5px;
}

/* ============================ 侧栏导航 ============================ */

.side-nav { display: flex; flex-direction: column; gap: 1px; }

.side-nav a {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 10px; border-radius: 8px;
  font-size: 14px; color: var(--ink-2);
  transition: background .14s, color .14s;
}
.side-nav a:hover { background: var(--paper-3); color: var(--ink); }
.side-nav a.on { background: var(--paper-3); color: var(--ink); font-weight: 600; }
.side-nav .ic {
  width: 22px; height: 22px; flex: none;
  display: grid; place-items: center;
  font: 14px/1 var(--serif); color: var(--ink-3);
  border-radius: 5px;
}
.side-nav a.on .ic { color: var(--seal); }

.side-sec { margin-top: 22px; }
.side-sec h4 {
  margin: 0 0 8px; padding-left: 10px;
  font: 500 11px/1 var(--sans); letter-spacing: .16em;
  color: var(--ink-4); text-transform: uppercase;
}
.side-coll-list { display: flex; flex-wrap: wrap; gap: 6px; padding: 0 8px; }
.side-coll-list a {
  padding: 4px 9px; border-radius: 20px;
  font-size: 12.5px; color: var(--ink-2);
  border: 1px solid var(--line);
  transition: all .14s;
}
.side-coll-list a:hover { border-color: var(--seal); color: var(--seal); background: var(--seal-soft); }

/* ============================ 顶栏 ============================ */

.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 10px;
  height: 56px; padding: 0 28px;
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.topbar.scrolled { border-bottom-color: var(--line); }
.topbar h1 {
  flex: 1; min-width: 0; margin: 0;
  font: 500 13px/1.3 var(--sans); letter-spacing: .12em;
  color: var(--ink-3);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.topbar-actions { display: flex; align-items: center; gap: 6px; }

.icon-btn {
  width: 34px; height: 34px; flex: none;
  display: grid; place-items: center;
  border-radius: 8px; color: var(--ink-2);
  transition: background .14s, color .14s;
}
.icon-btn:hover { background: var(--paper-3); color: var(--ink); }
.icon-btn svg { width: 19px; height: 19px; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.icon-btn.only-mobile { display: none; }

/* ============================ 内容容器 ============================ */

.view {
  flex: 1;
  padding: 8px 28px 96px;
  max-width: calc(var(--read-w) + 56px);
  width: 100%;
  margin: 0 auto;
}

.boot { display: grid; place-items: center; gap: 14px; padding: 120px 0; color: var(--ink-3); font-size: 13px; }
.boot-seal {
  width: 54px; height: 54px; display: grid; place-items: center;
  font: 600 26px/1 var(--serif); color: #fffdf7; background: var(--seal);
  border-radius: 9px; animation: breathe 1.6s ease-in-out infinite;
}
@keyframes breathe { 0%,100% { opacity: .45; transform: scale(.97) } 50% { opacity: 1; transform: scale(1) } }

/* ============================ 每日一首 ============================ */

.hero {
  position: relative;
  margin: 10px 0 32px;
  padding: 30px 30px 26px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.hero::after {
  content: "詩"; position: absolute; right: -6px; bottom: -34px;
  font: 700 148px/1 var(--serif); color: var(--ink);
  opacity: .033; pointer-events: none; letter-spacing: 0;
}
.hero-top {
  display: flex; align-items: center; justify-content: space-between;
  gap: 10px; flex-wrap: wrap;
  margin-bottom: 20px;
}
.hero-label {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 11.5px; letter-spacing: .18em; color: var(--seal);
  font-weight: 600;
}
.hero-label::before { content: ""; width: 16px; height: 1px; background: var(--seal); opacity: .55; }
.hero-date { font-size: 11.5px; color: var(--ink-4); letter-spacing: .06em; }

.hero h2 {
  margin: 0 0 6px;
  font: 600 30px/1.32 var(--serif); letter-spacing: .045em;
}
.hero-by { font-size: 13px; color: var(--ink-3); letter-spacing: .05em; margin-bottom: 18px; }
.hero-by b { color: var(--ink-2); font-weight: 500; }

.hero-lines {
  font: 16.5px/2.1 var(--serif); color: var(--ink-2);
  letter-spacing: .07em; margin-bottom: 22px;
}
.hero-lines p { margin: 0; }

.hero-acts { display: flex; flex-wrap: wrap; gap: 9px; }

.btn {
  display: inline-flex; align-items: center; gap: 6px;
  height: 36px; padding: 0 15px; border-radius: 9px;
  font-size: 13.5px; font-weight: 500;
  border: 1px solid var(--line-2); color: var(--ink-2);
  background: var(--paper-2);
  transition: all .14s;
}
.btn:hover { border-color: var(--ink-4); color: var(--ink); }
.btn.solid { background: var(--ink); border-color: var(--ink); color: var(--paper-2); }
.btn.solid:hover { opacity: .88; color: var(--paper-2); }
.btn.seal { background: var(--seal); border-color: var(--seal); color: #fffdf7; }
.btn.seal:hover { opacity: .9; }
.btn.sm { height: 30px; padding: 0 11px; font-size: 12.5px; border-radius: 7px; }
.btn.on { background: var(--seal-soft); border-color: var(--seal); color: var(--seal); }

/* ============================ 区块标题 ============================ */

.sec { margin: 0 0 10px; }
.sec-head {
  display: flex; align-items: baseline; justify-content: space-between;
  margin: 34px 0 14px;
}
.sec-head h3 {
  margin: 0; font: 600 15px/1.4 var(--serif); letter-spacing: .08em;
}
.sec-head h3 small {
  font: 400 12px/1 var(--sans); color: var(--ink-4); letter-spacing: .02em; margin-left: 9px;
}
.sec-head a { font-size: 12.5px; color: var(--ink-3); }
.sec-head a:hover { color: var(--seal); }

/* ============================ 书架卡片 ============================ */

.books {
  display: grid; gap: 12px;
  grid-template-columns: repeat(auto-fill, minmax(178px, 1fr));
}
.book {
  position: relative; overflow: hidden;
  padding: 16px 15px 15px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  transition: transform .16s, box-shadow .16s, border-color .16s;
}
.book:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--line-2); }
.book-cat {
  font-size: 10.5px; letter-spacing: .16em; color: var(--ink-4); margin-bottom: 8px;
}
.book h4 { margin: 0 0 4px; font: 600 17px/1.3 var(--serif); letter-spacing: .05em; }
.book p { margin: 0; font: 12.5px/1.5 var(--serif); color: var(--ink-3); min-height: 19px; }
.book-n { margin-top: 11px; font-size: 11.5px; color: var(--ink-4); letter-spacing: .05em; }
.book-n b { color: var(--seal); font-weight: 600; }
.book-bar { height: 2px; margin-top: 9px; background: var(--line); border-radius: 2px; overflow: hidden; }
.book-bar i { display: block; height: 100%; background: var(--seal); opacity: .6; }

/* 主题 chips */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 7px 14px; border-radius: 22px;
  font-size: 13px; color: var(--ink-2);
  background: var(--paper-2); border: 1px solid var(--line);
  transition: all .14s;
}
.chip:hover { border-color: var(--seal); color: var(--seal); background: var(--seal-soft); }
.chip i { font-style: normal; font-size: 11px; color: var(--ink-4); margin-left: 5px; }

/* ============================ 列表 ============================ */

.list { border-top: 1px solid var(--line); }

.row {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 15px 4px 14px;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  transition: background .12s;
}
.row:hover { background: color-mix(in srgb, var(--paper-3) 55%, transparent); }
.row-main { flex: 1; min-width: 0; }
.row-t {
  font: 500 16.5px/1.5 var(--serif); letter-spacing: .04em;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.row-s {
  margin-top: 3px; font: 13.5px/1.6 var(--serif); color: var(--ink-3);
  letter-spacing: .05em;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.row-meta {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  margin-top: 7px; font-size: 11.5px; color: var(--ink-4);
}
.row-meta .dot { width: 2px; height: 2px; border-radius: 50%; background: var(--ink-4); }
.row-side { flex: none; display: flex; align-items: center; gap: 4px; padding-top: 3px; }

.badge-done {
  display: inline-flex; align-items: center; gap: 3px;
  font-size: 10.5px; color: var(--jade);
  padding: 2px 6px; border-radius: 5px; background: var(--jade-soft);
}
.badge-new {
  font-size: 10.5px; color: var(--gold); padding: 2px 6px;
  border-radius: 5px; background: color-mix(in srgb, var(--gold) 12%, transparent);
}

.more {
  display: block; width: 100%; margin: 22px 0 0; padding: 12px;
  text-align: center; font-size: 13px; color: var(--ink-3);
  border: 1px dashed var(--line-2); border-radius: 10px;
  transition: all .14s;
}
.more:hover { color: var(--seal); border-color: var(--seal); }

.empty, .loading-row {
  padding: 56px 0; text-align: center;
  color: var(--ink-3); font-size: 13.5px;
}
.empty b { display: block; font: 600 15px var(--serif); color: var(--ink-2); margin-bottom: 6px; }

/* ============================ 详情页 ============================ */

.poem-head { text-align: center; padding: 18px 0 26px; }
.poem-head h2 {
  margin: 0 0 10px;
  font: 600 27px/1.5 var(--serif); letter-spacing: .06em;
}
.poem-head .by { font-size: 13.5px; color: var(--ink-3); letter-spacing: .06em; }
.poem-head .by a { color: var(--ink-2); border-bottom: 1px solid var(--line-2); padding-bottom: 1px; }
.poem-head .by a:hover { color: var(--seal); border-color: var(--seal); }
.poem-head .tags { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; }
.poem-head .tags span {
  font-size: 11px; color: var(--ink-3);
  padding: 3px 8px; border-radius: 5px; background: var(--paper-3);
}

.poem-tools {
  display: flex; align-items: center; justify-content: center; gap: 4px;
  padding: 0 0 22px; flex-wrap: wrap;
}
.tool {
  height: 28px; padding: 0 11px; border-radius: 7px;
  font-size: 12.5px; color: var(--ink-3);
  border: 1px solid var(--line);
  background: var(--paper-2);
  transition: all .14s;
}
.tool:hover { background: var(--paper-3); color: var(--ink); border-color: var(--line-2); }
.tool.on { color: var(--seal); background: var(--seal-soft); }

.poem-body {
  font: 19px/2.5 var(--serif);
  letter-spacing: .12em;
  text-align: center;
  padding: 34px 0 40px;
}
.poem-body p { margin: 0 0 2px; }
.poem-body.fs-s { font-size: 16.5px; line-height: 2.3; }
.poem-body.fs-l { font-size: 22px; line-height: 2.7; }
.poem-body.vert {
  writing-mode: vertical-rl;
  text-orientation: upright;
  height: 62vh; min-height: 380px;
  display: inline-block; text-align: left;
  margin: 0 auto; padding: 0 10px;
  letter-spacing: .18em;
}
.poem-body-wrap { display: flex; justify-content: center; overflow-x: auto; }

/* 背诵模式 */
.poem-body .dots { display: none; color: var(--ink-4); letter-spacing: .03em; }
.poem-body.recite p { cursor: pointer; position: relative; padding: 2px 0; border-radius: 6px; transition: background .14s; }
.poem-body.recite p:hover { background: color-mix(in srgb, var(--paper-3) 70%, transparent); }
.poem-body.recite p:not(.shown) .txt { visibility: hidden; }
.poem-body.recite p:not(.shown) .dots { display: inline; }
.poem-body.recite p.shown .dots { display: none; }

.recite-bar {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  padding: 12px; margin-bottom: 20px;
  background: var(--paper-3); border-radius: 10px;
  font-size: 12.5px; color: var(--ink-3);
}

.panel {
  margin: 0 0 16px;
  padding: 18px 20px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
}
.panel h4 {
  margin: 0 0 10px; font: 600 12px/1 var(--sans);
  letter-spacing: .16em; color: var(--seal); text-transform: uppercase;
}
.panel .txt { font: 15px/1.95 var(--serif); color: var(--ink-2); letter-spacing: .04em; }
.panel .txt p { margin: 0 0 8px; }
.panel .txt p:last-child { margin-bottom: 0; }

.poem-nav {
  display: flex; gap: 10px; margin-top: 34px;
  padding-top: 20px; border-top: 1px solid var(--line);
}
.poem-nav a {
  flex: 1; min-width: 0; padding: 12px 14px;
  border: 1px solid var(--line); border-radius: 10px;
  font-size: 13px; color: var(--ink-2);
  transition: all .14s;
}
.poem-nav a:hover { border-color: var(--seal); color: var(--seal); }
.poem-nav a span { display: block; font-size: 10.5px; color: var(--ink-4); margin-bottom: 3px; }
.poem-nav a b { font: 500 14px var(--serif); display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.poem-nav a.next { text-align: right; }

/* ============================ 诗人 ============================ */

.author-head { display: flex; gap: 16px; align-items: center; padding: 8px 0 24px; }
.author-avatar {
  width: 62px; height: 62px; flex: none;
  display: grid; place-items: center;
  font: 600 25px/1 var(--serif);
  color: var(--seal); background: var(--seal-soft);
  border: 1px solid color-mix(in srgb, var(--seal) 22%, transparent);
  border-radius: 50%;
}
.author-head h2 { margin: 0 0 4px; font: 600 24px/1.3 var(--serif); letter-spacing: .08em; }
.author-head .sub { font-size: 12.5px; color: var(--ink-3); letter-spacing: .04em; }

.bio { font: 14.5px/1.9 var(--serif); color: var(--ink-2); letter-spacing: .04em; }

/* 字母索引 */
.alpha-bar {
  display: flex; flex-wrap: wrap; gap: 3px;
  margin: 0 0 20px; padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.alpha-bar button {
  width: 27px; height: 27px; border-radius: 6px;
  font: 500 12px/1 var(--sans); color: var(--ink-3);
}
.alpha-bar button:hover { background: var(--paper-3); color: var(--ink); }
.alpha-bar button.on { background: var(--seal); color: #fff; }

/* 诗人列表 */
.authors { display: grid; gap: 0 22px; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
.authors a {
  display: flex; align-items: baseline; gap: 8px;
  padding: 11px 2px; border-bottom: 1px solid var(--line);
  transition: color .12s;
}
.authors a:hover { color: var(--seal); }
.authors a b { font: 500 15px/1.4 var(--serif); letter-spacing: .05em; }
.authors a i { font-style: normal; font-size: 11px; color: var(--ink-4); margin-left: auto; }

/* ============================ 检索页 ============================ */

.search-hero { padding: 14px 0 8px; }
.search-box {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 15px;
  background: var(--paper-2); border: 1px solid var(--line-2);
  border-radius: 12px;
  transition: border-color .16s, box-shadow .16s;
}
.search-box:focus-within { border-color: var(--ink-4); box-shadow: 0 0 0 4px rgba(166,51,43,.06); }
.search-box svg { width: 18px; height: 18px; fill: none; stroke: var(--ink-3); stroke-width: 1.9; flex: none; }
.search-box input { flex: 1; min-width: 0; border: 0; outline: 0; background: none; font-size: 15.5px; }
.search-box .clr { font-size: 12px; color: var(--ink-4); padding: 2px 6px; }
.search-box .clr:hover { color: var(--ink); }

.search-hint { font-size: 12.5px; color: var(--ink-4); margin: 12px 2px 0; }
.search-hint b { color: var(--ink-2); font-weight: 500; }

.hot { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 6px; }
.hot button {
  padding: 6px 13px; border-radius: 20px; font-size: 13px;
  color: var(--ink-2); background: var(--paper-2); border: 1px solid var(--line);
  transition: all .14s;
}
.hot button:hover { border-color: var(--seal); color: var(--seal); background: var(--seal-soft); }

.result-head {
  display: flex; align-items: center; justify-content: space-between;
  margin: 26px 0 4px; padding-bottom: 10px;
  font-size: 12.5px; color: var(--ink-3);
  border-bottom: 1px solid var(--line);
}
.result-head .kind {
  padding: 2px 7px; border-radius: 5px;
  background: var(--jade-soft); color: var(--jade); font-size: 11px;
}
.result-head .kind.fuzzy { background: var(--paper-3); color: var(--ink-3); }

/* ============================ 我的 ============================ */

.stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 6px 0 28px; }
.stat {
  padding: 16px 14px; text-align: center;
  background: var(--paper-2); border: 1px solid var(--line); border-radius: var(--r-md);
}
.stat b { display: block; font: 600 25px/1.2 var(--serif); color: var(--seal); }
.stat span { font-size: 11.5px; color: var(--ink-3); letter-spacing: .06em; }

.tabs {
  display: flex; gap: 2px; margin: 0 0 4px;
  border-bottom: 1px solid var(--line);
}
.tabs button {
  padding: 10px 14px; font-size: 13.5px; color: var(--ink-3);
  border-bottom: 2px solid transparent; margin-bottom: -1px;
  transition: all .14s;
}
.tabs button:hover { color: var(--ink); }
.tabs button.on { color: var(--seal); border-bottom-color: var(--seal); font-weight: 600; }

/* ============================ 移动端底栏 ============================ */

.tabbar { display: none; }

.toast {
  position: fixed; left: 50%; bottom: 34px; transform: translate(-50%, 16px);
  padding: 9px 18px; border-radius: 20px;
  background: rgba(28, 24, 19, .92); color: #f8f4ea;
  font-size: 13px; letter-spacing: .02em;
  opacity: 0; pointer-events: none;
  transition: opacity .22s, transform .22s;
  z-index: 200;
  max-width: 78vw; text-align: center;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ============================ 账号 ============================ */

.acc {
  display: flex; align-items: center; gap: 12px;
  padding: 13px 15px; margin: 6px 0 16px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-sm);
}
.acc-ic {
  flex: none; width: 38px; height: 38px; border-radius: 50%;
  display: grid; place-items: center;
  font: 600 15px/1 var(--serif);
  color: var(--ink-4); background: var(--paper-3);
  border: 1px solid var(--line);
}
.acc-ic.on { color: #fff; background: #1aad19; border-color: #16a015; }
.acc-tx { flex: 1 1 auto; min-width: 0; }
.acc-tx b { display: block; font-size: 14px; font-weight: 600; color: var(--ink); letter-spacing: .02em; }
.acc-tx span {
  display: block; margin-top: 2px;
  font-size: 11.5px; color: var(--ink-3); letter-spacing: .02em;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.acc-act { flex: none; display: flex; gap: 8px; }
.acc-btn {
  padding: 7px 15px; border-radius: 20px; cursor: pointer;
  font: inherit; font-size: 12.5px; letter-spacing: .04em;
  color: #fff; background: var(--seal); border: 1px solid var(--seal);
  transition: filter .15s, opacity .15s;
}
.acc-btn:hover { filter: brightness(1.06); }
.acc-btn:disabled { opacity: .55; cursor: default; }
.acc-btn.ghost { color: var(--ink-2); background: transparent; border-color: var(--line-2); }
.acc-btn.ghost:hover { background: var(--paper-3); }

/* ============================ 登录弹层 ============================ */

.mask {
  position: fixed; inset: 0; z-index: 300;
  display: grid; place-items: center; padding: 20px;
  background: rgba(24, 20, 15, .42);
  backdrop-filter: blur(3px);
  animation: maskIn .16s ease-out;
}
@keyframes maskIn { from { opacity: 0; } to { opacity: 1; } }

.dlg {
  position: relative; width: 100%; max-width: 340px;
  padding: 26px 22px 20px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: 0 18px 48px rgba(30, 24, 16, .22);
  text-align: center;
  animation: dlgIn .2s cubic-bezier(.2, .9, .3, 1);
}
@keyframes dlgIn { from { opacity: 0; transform: translateY(10px) scale(.98); } to { opacity: 1; transform: none; } }

.dlg-x {
  position: absolute; top: 9px; right: 11px;
  width: 28px; height: 28px; border: 0; border-radius: 50%;
  background: transparent; color: var(--ink-4);
  font-size: 20px; line-height: 1; cursor: pointer;
}
.dlg-x:hover { background: var(--paper-3); color: var(--ink-2); }

.dlg h3 {
  margin: 0 0 16px;
  font: 600 16px/1.3 var(--serif); color: var(--ink); letter-spacing: .06em;
}
.dlg-code {
  margin: 0 auto 14px; padding: 14px 0;
  font: 600 27px/1 var(--sans); letter-spacing: .16em;
  color: var(--seal); background: var(--seal-soft);
  border-radius: var(--r-sm);
  font-variant-numeric: tabular-nums;
}
.dlg-code.ok { font-size: 18px; letter-spacing: .1em; color: var(--jade); background: var(--jade-soft); }
.dlg-steps {
  margin: 0 0 14px; padding-left: 18px;
  text-align: left;
  font-size: 12.5px; line-height: 2; color: var(--ink-2);
}
.dlg-tip { margin: 0; font-size: 11.5px; color: var(--ink-3); letter-spacing: .02em; }

/* ============================ 响应式 ============================ */

@media (max-width: 900px) {
  /* 注意：--read-w 由 720px 变 100% 时，.view 的 calc(100% + 56px) 会横向溢出，
     必须显式把 max-width 撑回 100% */
  :root { --read-w: 100%; }

  .side { display: none; }
  .view { max-width: 100%; }
  .main { margin-left: 0; }

  .topbar { height: 50px; padding: 0 12px; }
  .topbar h1 { font: 600 15px/1.3 var(--serif); letter-spacing: .04em; color: var(--ink); }
  .icon-btn.only-mobile { display: grid; }

  .view { padding: 4px 16px calc(78px + env(safe-area-inset-bottom)); }

  .hero { margin: 6px 0 24px; padding: 22px 20px 20px; border-radius: 16px; }
  .hero::after { font-size: 110px; bottom: -26px; }
  .hero h2 { font-size: 25px; }
  .hero-lines { font-size: 15.5px; line-height: 2; }

  .books { grid-template-columns: repeat(auto-fill, minmax(148px, 1fr)); gap: 10px; }
  .book { padding: 14px 13px 13px; }
  .book h4 { font-size: 16px; }

  .row { padding: 13px 2px 12px; }
  .row-t { font-size: 16px; }

  .poem-head h2 { font-size: 23px; }
  /* 窄屏收紧字距，让「君不见黄河之水天上来，奔流到海不复回」这类 19 字长句尽量不折行 */
  .poem-body { font-size: 17.5px; line-height: 2.35; letter-spacing: .03em; }
  .poem-body.fs-s { font-size: 15.5px; }
  .poem-body.fs-l { font-size: 19.5px; }
  .body-wrap { margin: 0 -6px; }
  .poem-body.vert { height: 56vh; min-height: 320px; }

  .tabbar {
    position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
    display: flex; align-items: stretch;
    height: calc(56px + env(safe-area-inset-bottom));
    padding-bottom: env(safe-area-inset-bottom);
    background: color-mix(in srgb, var(--paper-2) 92%, transparent);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-top: 1px solid var(--line);
  }
  .tabbar a {
    flex: 1; display: flex; flex-direction: column;
    align-items: center; justify-content: center; gap: 3px;
    color: var(--ink-3);
  }
  .tabbar a .ic { font: 15px/1 var(--serif); }
  .tabbar a b { font-size: 10.5px; font-weight: 500; letter-spacing: .04em; }
  .tabbar a.on { color: var(--seal); }

  .toast { bottom: calc(74px + env(safe-area-inset-bottom)); }
  .authors { grid-template-columns: repeat(auto-fill, minmax(132px, 1fr)); }
}

@media (max-width: 380px) {
  .books { grid-template-columns: 1fr 1fr; }
  .stat-grid { gap: 7px; }
  .stat b { font-size: 21px; }
}