/* 万象官网样式：书库的书的质感。字体三层：标题书法（马善政楷，裁剪后自托管）、正文黑体（思源黑体子集，自托管）、点缀宋体（系统字体）。CSP 下不引外部字体。
   正式美术（纸纹、书封、插画）到了之后，只换变量和背景图，不动结构。见 docs/modules/site.md §8。 */
:root {
  --wood: #1b130e;
  --wood-2: #2a1d14;
  --leather: #3a2417;
  --leather-2: #4b2f1d;
  --paper: #efe6d2;
  --paper-2: #eadfc8;
  --paper-edge: #cdbb94;
  --ink: #1a1a24;
  --ink-soft: #66543e;
  --gold: #c9a227;
  --gold-2: #e8c76a;
  --amber: #e8a33d;
  --cloth: #2f4a3a;
  --cloth-2: #3b5b48;
  --red: #7a1f2b;
  --radius: 6px;
  --max: 980px;
  --title: "WX Title", "Ma Shan Zheng", "STKaiti", "KaiTi", "Noto Serif SC", serif;
  --body: "WX Body", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --accent: "Noto Serif SC", "Songti SC", "STSong", "SimSun", "Source Han Serif SC", "Noto Serif CJK SC", "Yu Mincho", Georgia, serif;
  font-family: var(--body);
}
@font-face { font-family: "WX Title"; src: url("/fonts/title-mashanzheng.woff") format("woff"); font-display: swap; unicode-range: U+2E80-9FFF, U+3000-303F, U+FF00-FFEF; }
@font-face { font-family: "WX Body"; src: url("/fonts/body-hans.woff") format("woff"); font-weight: 400 700; font-display: swap; }
@font-face { font-family: "WX Body Hant"; src: url("/fonts/body-hant.woff") format("woff"); font-weight: 400 700; font-display: swap; }
@font-face { font-family: "WX Body JA"; src: url("/fonts/body-ja.woff") format("woff"); font-weight: 400 700; font-display: swap; }
@font-face { font-family: "WX Body EN"; src: url("/fonts/body-en.woff") format("woff"); font-weight: 400 700; font-display: swap; }
/* 每种语言各用各的字体：书法标题只给简体中文页；其他语言的标题用宋体/衬线体（--accent） */
html[data-lang="hant"] { --body: "WX Body Hant", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", "Noto Sans SC", sans-serif; --title: var(--accent); }
html[data-lang="ja"] { --body: "WX Body JA", "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif; --title: var(--accent); }
html[data-lang="en"] { --body: "WX Body EN", "Noto Sans SC", "Segoe UI", "Helvetica Neue", Arial, sans-serif; --title: var(--accent); }
html[data-lang="hant"] { --accent: "Noto Serif TC", "Songti TC", "PMingLiU", "MingLiU", "Noto Serif SC", serif; }
html[data-lang="ja"] { --accent: "Noto Serif JP", "Yu Mincho", "Hiragino Mincho ProN", "MS Mincho", serif; }
html[data-lang="en"] { --accent: Georgia, "Times New Roman", "Noto Serif SC", serif; }
html[data-lang="en"] .site-header nav a, html[data-lang="en"] .btn, html[data-lang="en"] .brand { letter-spacing: 0.02em; }
html[data-lang="en"] .brand { font-size: 28px; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  line-height: 1.85;
  font-size: 16px;
  /* 书库的木头与烛光：深色木底，上方一点暖光 */
  background:
    radial-gradient(900px 480px at 50% -8%, rgba(227, 197, 129, 0.22), transparent 70%),
    repeating-linear-gradient(90deg, rgba(0, 0, 0, 0.12) 0 2px, transparent 2px 9px),
    linear-gradient(180deg, var(--wood-2), var(--wood));
  background-attachment: fixed;
}
a { color: var(--red); }
a:hover { color: var(--amber); }

/* 页眉：皮面书脊 */
.site-header {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 24px;
  background: linear-gradient(180deg, var(--leather-2), var(--leather));
  border-bottom: 2px solid #20130b;
  box-shadow: 0 2px 0 var(--gold) inset, 0 6px 18px rgba(0, 0, 0, 0.5);
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--gold-2); text-decoration: none; font-family: var(--title); font-size: 26px; letter-spacing: 0.12em; line-height: 1;
  text-shadow: 0 1px 0 #000;
}
.brand:hover { color: #f3dca2; }
.brand img { width: 28px; height: 28px; }
.site-header nav { padding-right: 0; margin-left: auto; }
.lang { display: inline-flex; gap: 2px; margin-left: 18px; padding-left: 14px; border-left: 1px solid rgba(201, 162, 39, 0.5); }
.lang a { color: #d8c49a; text-decoration: none; font-size: 13px; padding: 3px 7px; border-radius: 3px; line-height: 1.3; }
.lang a:hover { color: var(--amber); }
.lang a[aria-current] { color: var(--leather); background: var(--gold-2); font-weight: 700; }
.legal-note { margin: 0 0 22px; padding: 10px 16px; font-size: 14px; background: rgba(255, 255, 255, 0.45); border: 1px dashed var(--paper-edge); border-radius: 3px; color: var(--ink-soft); }
.site-header nav a { color: #d8c49a; text-decoration: none; margin-left: 18px; font-size: 14px; letter-spacing: 0.08em; }
.site-header nav a:hover { color: var(--amber); }

/* 书页：纸面、叠出来的页边、中缝阴影 */
main {
  position: relative;
  max-width: var(--max); margin: 32px auto 56px; padding: 8px 56px 64px;
  background:
    radial-gradient(circle at 20% 10%, rgba(255, 255, 255, 0.35), transparent 55%),
    linear-gradient(180deg, var(--paper), var(--paper-2));
  border-radius: 3px 8px 8px 3px;
  box-shadow:
    1px 0 0 var(--paper-edge), 3px 1px 0 #e2d4b2, 4px 2px 0 var(--paper-edge),
    6px 3px 0 #e2d4b2, 7px 4px 0 var(--paper-edge),
    0 24px 50px rgba(0, 0, 0, 0.65);
}
main::before { /* 左侧装订线 */
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 14px;
  background: linear-gradient(90deg, rgba(60, 38, 18, 0.28), transparent);
  border-radius: 3px 0 0 3px;
}

section { padding: 48px 0 8px; }

/* 页标题：书法 + 金线 */
h2 { font-family: var(--title); font-weight: 400; font-size: 34px; letter-spacing: 0.1em; margin: 0 0 22px; color: var(--ink); }
h2::after {
  content: ""; display: block; margin-top: 10px; height: 1px; width: 120px;
  background: linear-gradient(90deg, var(--gold), transparent);
}

.btn {
  display: inline-block; padding: 11px 26px; border-radius: 4px;
  border: 1px solid var(--leather); color: var(--leather); text-decoration: none; background: transparent; letter-spacing: 0.08em;
}
.btn.primary { /* 皮面烫金按钮 */
  background: linear-gradient(180deg, var(--leather-2), var(--leather)); color: var(--gold-2);
  border-color: #20130b; font-weight: 700;
  box-shadow: 0 0 0 2px var(--paper), 0 0 0 3px var(--gold), 0 6px 14px rgba(40, 20, 8, 0.4);
  text-shadow: 0 1px 0 #000;
}
.btn.primary:hover { color: var(--amber); filter: brightness(1.12); }
.btn.disabled { opacity: 0.5; cursor: not-allowed; }
.cta-note { margin: 0 0 24px; text-align: center; color: var(--ink-soft); font-size: 14px; }
/* 条款、隐私政策：正文页 */
.legal { max-width: 720px; margin: 0 auto; padding-top: 40px; }
.legal h3 { margin-top: 32px; font-size: 18px; }
.legal blockquote { margin: 16px 0; padding: 12px 18px; background: rgba(255, 255, 255, 0.4); border-left: 3px solid var(--gold); border-radius: 3px; }
.legal hr { border: 0; border-top: 1px solid var(--paper-edge); margin: 32px 0; }
.plain { text-align: center; padding-top: 120px; }

.site-footer { text-align: center; color: #a58c5e; font-size: 13px; padding: 8px 20px 44px; }
.site-footer a { color: #c9b07a; }

@media (max-width: 700px) {
  main { margin: 16px 10px 40px; padding: 4px 22px 48px 28px; background: linear-gradient(180deg, var(--paper), var(--paper-2)); }
  .site-header { padding: 8px 12px; flex-wrap: wrap; row-gap: 4px; }
  .site-header nav { padding-right: 0; }
  .site-header nav a { margin-left: 10px; }
}


/* ===== 首页：一本竖版的书（site-doc-v12）===== */
:root {
  --cover: #2c3a36;
  --cover-2: #22302c;
  --cover-line: rgba(0, 0, 0, 0.35);
  --foil: #cdb06a;
}
body.home { overflow-x: hidden; }
body.home main { max-width: none; margin: 0; padding: 0; background: none; box-shadow: none; border-radius: 0; }
body.home main::before { content: none; }
.book-stage { display: flex; flex-direction: column; align-items: center; padding: 22px 14px 8px; }
.book { position: relative; margin: 0 auto; }
.book { transition: transform 0.45s ease; }
.book.at-cover.is-spread { transform: translateX(-25%); }
.book.at-back.is-spread { transform: translateX(25%); }

/* 页：封面封底（硬皮）与内页（旧纸）共有的 */
.leaf { margin: 0; padding: 0; overflow: hidden; position: relative; }
.leaf.page {
  --fit: 1;
  padding: calc(var(--u) * 11) calc(var(--u) * 10) calc(var(--u) * 12);
  font-size: calc(var(--u) * 4.1 * var(--fit));
  line-height: 1.95;
  color: var(--ink);
  background:
    radial-gradient(circle at 30% 12%, rgba(255, 255, 255, 0.13), transparent 60%),
    repeating-linear-gradient(0deg, rgba(120, 90, 40, 0.035) 0 1px, transparent 1px 4px),
    linear-gradient(180deg, var(--paper), var(--paper-2));
}
.stf__item.--left.page, .leaf.page.--left { box-shadow: inset -26px 0 28px -22px rgba(60, 38, 18, 0.45), inset 1px 0 0 rgba(255, 255, 255, 0.3); }
.stf__item.--right.page, .leaf.page.--right { box-shadow: inset 26px 0 28px -22px rgba(60, 38, 18, 0.45), inset -1px 0 0 rgba(255, 255, 255, 0.3); }
.leaf.page h2 { font-size: calc(var(--u) * 8 * var(--fit)); margin: 0 0 calc(var(--u) * 6); text-align: center; letter-spacing: 0.14em; }
.leaf.page h2::after { margin: calc(var(--u) * 2.5) auto 0; width: calc(var(--u) * 14); background: linear-gradient(90deg, transparent, var(--gold), transparent); }
.leaf.page h3 { font-family: var(--accent); font-weight: 600; font-size: calc(var(--u) * 4.4 * var(--fit)); margin: calc(var(--u) * 6) 0 calc(var(--u) * 1.5); letter-spacing: 0.1em; }
.prose { font-family: var(--accent); }
.prose p { margin: 0; text-indent: 2em; text-align: justify; hyphens: auto; }
.prose p + p { margin-top: 0.7em; }
html[data-lang="en"] .prose p, html[data-lang="ja"] .prose p { text-indent: 1.5em; }
.leaf.page p a:not(.btn) { color: var(--red); }
.steam .btn.primary { color: var(--gold-2); }
.steam .btn.disabled { opacity: 0.55; }
.contact p { margin: 0; text-indent: 0; font-size: 0.95em; }
.contact { margin-top: calc(var(--u) * 2); }
.folio { position: absolute; left: 0; right: 0; bottom: calc(var(--u) * 6); text-align: center; font-family: var(--accent); font-size: calc(var(--u) * 3.4); color: var(--ink-soft); letter-spacing: 0.08em; }
.steam { margin: calc(var(--u) * 5) 0 0; text-align: center; }
.steam .btn { font-size: 0.9em; padding: 0.55em 1.6em; }
.leaf.inside { background: radial-gradient(circle at 50% 40%, #d9cfba, #c4b79c); box-shadow: inset 26px 0 28px -22px rgba(40, 28, 14, 0.5); }
.stf__item.--left.inside, .leaf.inside.--left { box-shadow: inset -26px 0 28px -22px rgba(40, 28, 14, 0.5); }

/* 封面、封底：布面硬皮，不放花纹，只有烫金的书名 */
.leaf.cover {
  color: var(--foil);
  background:
    radial-gradient(120% 90% at 30% 10%, rgba(255, 255, 255, 0.08), transparent 60%),
    repeating-linear-gradient(0deg, rgba(0, 0, 0, 0.1) 0 1px, transparent 1px 3px),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.035) 0 1px, transparent 1px 3px),
    linear-gradient(135deg, var(--cover), var(--cover-2));
  border-radius: 2px 7px 7px 2px;
  box-shadow: inset 7px 0 8px -4px rgba(0, 0, 0, 0.5), inset 12px 0 0 -9px rgba(255, 255, 255, 0.1), inset 0 0 0 1px var(--cover-line), 0 22px 46px rgba(0, 0, 0, 0.6);
}
.leaf.cover.back { border-radius: 7px 2px 2px 7px; box-shadow: inset -7px 0 8px -4px rgba(0, 0, 0, 0.5), inset 0 0 0 1px var(--cover-line), 0 22px 46px rgba(0, 0, 0, 0.6); }
.cover-face { position: absolute; inset: calc(var(--u) * 5) calc(var(--u) * 6) calc(var(--u) * 5) calc(var(--u) * 9); display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.cover-title { margin: 0; padding: 0; }
.cover-title .wordmark {
  display: block; width: calc(var(--u) * 46); height: calc(var(--u) * 46);
  background: linear-gradient(160deg, #f0dc9a, var(--foil) 45%, #9b7f3c);
  -webkit-mask: url("/logo-wordmark.svg") center / contain no-repeat; mask: url("/logo-wordmark.svg") center / contain no-repeat;
  filter: drop-shadow(0 1px 0 rgba(0, 0, 0, 0.55));
}
.cover-sub { margin: calc(var(--u) * 7) 0 0; font-family: var(--accent); font-size: calc(var(--u) * 4); letter-spacing: 0.2em; color: #d9c58f; }
.cover-small { position: absolute; left: 0; right: 0; bottom: calc(var(--u) * 6); margin: 0; font-family: var(--accent); font-size: calc(var(--u) * 3.1); letter-spacing: 0.16em; color: rgba(217, 197, 143, 0.75); }
.cover-open { position: absolute; right: calc(var(--u) * 1); top: calc(var(--u) * 1); margin: 0; font-family: var(--accent); font-size: calc(var(--u) * 3); letter-spacing: 0.2em; color: rgba(217, 197, 143, 0.55); }
.leaf.cover.back .seal { width: calc(var(--u) * 10); height: calc(var(--u) * 10); border: 1px solid rgba(205, 176, 106, 0.4); border-radius: 50%; }

/* 书下面的目录条 */
.book-ui { display: flex; align-items: center; justify-content: center; gap: 14px; margin: 22px 0 6px; }
.book-prev, .book-next { width: 34px; height: 34px; border-radius: 50%; border: 1px solid rgba(201, 162, 39, 0.6); background: rgba(0, 0, 0, 0.25); color: var(--gold-2); font-size: 20px; line-height: 1; cursor: pointer; }
.book-prev:disabled, .book-next:disabled { opacity: 0.3; cursor: default; }
.book-dots { display: flex; gap: 10px; }
.book-dot { width: 10px; height: 10px; padding: 0; border-radius: 50%; border: 1px solid rgba(201, 162, 39, 0.7); background: transparent; cursor: pointer; }
.book-dot[aria-current] { background: var(--gold-2); }

/* 没有 JS 或翻页库没加载：竖着一页一页排 */
html:not(.js) .book { max-width: 640px; margin: 24px auto; }
html:not(.js) .leaf { margin-bottom: 18px; }
html:not(.js) .leaf.cover { min-height: 70vh; --u: 6px; }
html:not(.js) .leaf.page { --u: 6px; }
html:not(.js) .leaf.inside, html:not(.js) .leaf.cover.back { display: none; }
html:not(.js) .folio, html:not(.js) .cover-open { display: none; }
html:not(.js) .book-ui { display: none; }
html:not(.js) .cover-face { position: static; padding: 80px 20px 60px; min-height: 70vh; }
html:not(.js) .cover-small { position: static; margin-top: 36px; }
html:not(.js) .leaf.page { padding: 40px 36px 48px; }

@media (max-width: 700px) {
  .site-header { padding: 8px 12px; flex-wrap: wrap; row-gap: 4px; }
  .site-header nav { padding-right: 0; }
  .site-header nav a { margin-left: 10px; font-size: 13px; }
  .book-stage { padding: 12px 8px 4px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* 缩字号档位：翻页库会重写行内样式，所以档位写在属性上 */
.leaf.page[data-fit="97"] { --fit: 0.97; }
.leaf.page[data-fit="94"] { --fit: 0.94; }
.leaf.page[data-fit="91"] { --fit: 0.91; }
.leaf.page[data-fit="88"] { --fit: 0.88; }
.leaf.page[data-fit="85"] { --fit: 0.85; }
.leaf.page[data-fit="82"] { --fit: 0.82; }
.leaf.page[data-fit="79"] { --fit: 0.79; }
.leaf.page[data-fit="76"] { --fit: 0.76; }
.leaf.page[data-fit="73"] { --fit: 0.73; }
.leaf.page[data-fit="70"] { --fit: 0.7; }
.leaf.page[data-fit="67"] { --fit: 0.67; }
.leaf.page[data-fit="64"] { --fit: 0.64; }
.leaf.page[data-fit="61"] { --fit: 0.61; }
.leaf.page[data-fit="58"] { --fit: 0.58; }
.leaf.page[data-fit="55"] { --fit: 0.55; }