/* ============================================================
   文藏官网 · site.css
   设计基调：稿纸与朱批。冷灰纸底、墨色正文、朱砂只用一处。
   ============================================================ */

:root {
  --ink:      #16130F;
  --ink-2:    #2C2721;
  --paper:    #F2F2EF;
  --card:     #FFFFFF;
  --verm:     #A93226;
  --verm-dk:  #8B2318;
  --stone:    #6E6A62;
  --stone-2:  #928D83;
  --rule:     #DCD9D2;
  --rule-2:   #E8E5DE;

  --serif: "Palatino Linotype", Palatino, "Book Antiqua", Georgia,
           "Songti SC", "Source Han Serif SC", "Noto Serif CJK SC",
           "Yu Mincho", "Hiragino Mincho ProN", "Batang", serif;
  --sans:  "Segoe UI", -apple-system, BlinkMacSystemFont, "PingFang SC",
           "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei",
           "Malgun Gothic", sans-serif;
  --mono:  "Cascadia Mono", "SF Mono", Consolas, "Liberation Mono", monospace;

  --wrap: 1180px;
  --pad: 32px;
}

/* Feature discovery and task pages */
.fx-index-hero{padding:96px 0 104px;background:#221f1c;color:#f8f4ec}.fx-index-hero h1{font-size:clamp(42px,5vw,72px);max-width:900px;margin:16px 0 24px}.fx-index-hero p:not(.eyebrow){max-width:640px;color:#d6cec2;font-size:19px;margin-bottom:32px}
.fx-group{padding:82px 0;border-bottom:1px solid var(--rule)}.fx-group:nth-child(odd){background:#ebe9e3}.fx-group-head{display:grid;grid-template-columns:1fr 320px;gap:40px;align-items:center;margin-bottom:28px}.fx-group-head h2{font-size:clamp(34px,4vw,54px);margin-top:12px}.fx-group-head img{width:320px;height:150px;object-fit:cover;border-radius:7px}
.fx-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.fx-card{display:block;min-height:210px;background:#fff;border:1px solid var(--rule);border-radius:7px;padding:25px;transition:transform .2s,border-color .2s}.fx-card:hover{transform:translateY(-3px);border-color:var(--verm)}.fx-card span{font:12px var(--mono);color:var(--verm)}.fx-card h3{font-size:23px;margin:16px 0 10px}.fx-card p{font-size:14px;color:var(--stone);line-height:1.55}
.fx-hero{padding:64px 0 75px;background:#eae7df}.fx-hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:56px;align-items:center}.fx-hero h1{font-size:clamp(36px,4vw,64px);margin:18px 0 23px}.fx-lead{font-size:19px;color:#4a433b;line-height:1.7}.fx-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}.fx-hero figure{margin:0}.fx-hero figure img{display:block;width:100%;height:auto;aspect-ratio:3/2;object-fit:cover;border-radius:9px;box-shadow:0 24px 45px #211d1824}.fx-hero figcaption{font-size:12px;color:var(--stone);margin-top:10px}
.fx-body{padding:85px 0}.fx-body .sec{max-width:750px;margin-bottom:30px}.fx-body .sec h2,.fx-related h2{font-size:clamp(30px,3vw,45px)}.fx-benefits{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.fx-benefits>div{border-top:2px solid var(--verm);background:#fff;padding:25px 24px;min-height:170px}.fx-benefits span{font:12px var(--mono);color:var(--verm)}.fx-benefits h3{font-size:22px;margin:17px 0 10px}.fx-benefits p{font-size:14px;color:var(--stone)}
.fx-guide{display:flex;justify-content:space-between;align-items:center;gap:28px;background:#e9e4d9;padding:34px;margin-top:46px;border-radius:8px}.fx-guide h2{font-size:30px;margin:7px 0}.fx-guide p:not(.eyebrow){font-size:15px;color:var(--stone);max-width:600px}.fx-guide .btn{flex:none}
.fx-story{max-width:780px;margin:55px auto 0}.fx-story h2{font-size:32px;margin-bottom:22px}.fx-story p{margin:0 0 18px;color:#4a433b;font-size:17px;line-height:1.85}
.fx-task{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.82fr);gap:56px;align-items:start;margin-top:72px;padding-top:58px;border-top:1px solid var(--rule)}
.fx-task.no-figure{grid-template-columns:1fr}
.fx-task h2{font-size:clamp(30px,3.1vw,43px);line-height:1.3;margin:10px 0 18px}.fx-task-intro{font-size:17px;line-height:1.8;color:#4a433b;margin:0 0 26px}
.fx-faq{border-top:1px solid var(--rule)}.fx-faq-item{padding:21px 0;border-bottom:1px solid var(--rule)}.fx-faq-item h3{font-size:20px;line-height:1.45;margin:0 0 8px}.fx-faq-item p{font-size:15px;color:var(--stone);line-height:1.75;margin:0}
.fx-task figure{position:sticky;top:100px;margin:0;background:#201f1d;padding:12px;border-radius:9px;box-shadow:0 20px 42px #211d181c}.fx-task figure img{display:block;width:100%;height:auto;border-radius:5px}.fx-task figcaption{font-size:12px;color:#dfd9ce;padding:10px 4px 1px}
.fx-task figcaption a{color:#f3cabd;text-decoration:underline;text-underline-offset:3px}
.fx-related{padding:70px 0 95px;background:#eeeae2}.fx-related h2{margin-bottom:25px}
@media(max-width:900px){.fx-hero-grid{grid-template-columns:minmax(0,1fr)}.fx-group-head{grid-template-columns:1fr 220px}.fx-cards,.fx-benefits{grid-template-columns:repeat(2,minmax(0,1fr))}.fx-task{grid-template-columns:1fr;gap:30px}.fx-task figure{position:static;max-width:720px}}
@media(max-width:620px){.fx-index-hero{padding:65px 0}.fx-group{padding:55px 0}.fx-group-head,.fx-cards,.fx-benefits{grid-template-columns:1fr}.fx-group-head img{width:100%;height:170px}.fx-hero{padding:50px 0}.fx-guide{display:block}.fx-guide .btn{margin-top:20px}}
.fx-hero-grid>*{min-width:0}.fx-hero h1,.fx-card h3{overflow-wrap:anywhere}
.fx-hero .fx-real-screen{padding:16px;background:#22252a;border-radius:12px;box-shadow:0 24px 45px #211d1824}.fx-hero .fx-real-screen img{width:100%;height:auto;max-height:600px;aspect-ratio:auto;object-fit:contain;border-radius:5px;box-shadow:none}.fx-hero .fx-real-screen figcaption{color:#ddd9d1;margin:10px 4px 0}.fx-hero .fx-real-screen:has(img[src*="batch-menu"]){max-width:380px;justify-self:center}.fx-task{display:block;max-width:860px}.fx-task-copy{max-width:860px}.fx-steps{max-width:860px;margin:66px auto 0;padding-top:52px;border-top:1px solid var(--rule)}.fx-steps h2{font-size:clamp(30px,3vw,43px);margin:10px 0 28px}.fx-step-topic{padding:26px 30px;margin:16px 0;background:#fff;border-left:3px solid var(--verm);border-radius:0 8px 8px 0}.fx-step-topic h3{font-size:25px;margin:0 0 17px}.fx-step-topic h4{font-size:19px;margin:22px 0 9px}.fx-step-topic p{font-size:16px;line-height:1.8;color:#4a433b;margin:9px 0}.fx-step-topic .manual-step{padding-left:18px;border-left:2px solid #e5ded3}.fx-step-topic .manual-tip{background:#f3f0e9;padding:12px 16px;border-radius:5px}.fx-step-topic kbd{font:13px var(--mono);border:1px solid var(--rule);border-radius:4px;padding:2px 5px;background:#f8f7f3}@media(max-width:620px){.fx-hero .fx-real-screen{padding:8px}.fx-step-topic{padding:20px}}

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; }
img { height: auto; }

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.012em;
  line-height: 1.2;
}

p { margin: 0; }

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--pad);
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: 10px 18px;
  z-index: 100;
}
.skip:focus { left: 12px; top: 12px; }

/* ── 页头 ───────────────────────────────────────────────── */
.manual-grid,.use-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:28px 0 70px}
.manual-card,.use-grid a{display:block;position:relative;min-height:180px;padding:25px;background:#fff;border:1px solid var(--rule);border-radius:8px;transition:transform .2s,border-color .2s,box-shadow .2s}
.manual-card:hover,.use-grid a:hover{transform:translateY(-3px);border-color:var(--verm);box-shadow:0 12px 30px #16130f12}
.manual-card span,.use-grid a span{font:12px var(--mono);color:var(--verm);letter-spacing:.07em}
.manual-card h2,.use-grid h3{font-size:23px;margin:12px 0 8px}
.manual-card p,.use-grid p{color:var(--stone);font-size:14px;line-height:1.55}
.manual-card b{position:absolute;right:22px;top:20px;color:var(--verm)}
.manual-card[hidden]{display:none}
.manual-layout{display:grid;grid-template-columns:230px minmax(0,1fr);gap:64px;padding-top:48px;padding-bottom:100px}
.manual-toc{align-self:start;position:sticky;top:100px;display:grid;gap:8px;max-height:calc(100vh - 120px);overflow:auto;padding:16px 0;border-top:2px solid var(--verm)}
.manual-toc strong{font-size:13px;margin-bottom:7px}.manual-toc a{font-size:13px;line-height:1.4;color:var(--stone)}.manual-toc a:hover{color:var(--verm)}
.manual-content{max-width:800px}.manual-content section{padding:0 0 34px;margin-bottom:40px;border-bottom:1px solid var(--rule);scroll-margin-top:100px}.manual-content h2{font-size:29px;margin:0 0 24px}.manual-content p{margin:0 0 13px;line-height:1.8}.manual-step{padding-left:20px;position:relative}.manual-step:before{content:'•';position:absolute;left:2px;color:var(--verm)}.manual-tip{background:#eee8dc;border-left:3px solid var(--verm);padding:12px 16px}.manual-content figure{margin:22px 0}.manual-content figure img{display:block;max-width:100%;border:1px solid var(--rule);border-radius:6px}.manual-end{display:flex;flex-wrap:wrap;gap:12px}
.manual-content h3{font-size:19px;margin:20px 0 10px}
.manual-content strong{font-weight:700}
.manual-content kbd{display:inline-block;font:600 12px/1.5 ui-monospace,SFMono-Regular,Consolas,monospace;border:1px solid var(--rule);border-bottom-width:2px;border-radius:5px;background:#fff;padding:0 7px;margin:0 1px;white-space:nowrap}
.use-cases,.showcase{padding:90px 0;background:#ebe9e3}.use-cases .sec{margin-bottom:25px}.showcase-head{max-width:670px;margin-bottom:28px}.showcase-head h2{font-size:clamp(31px,4vw,50px);margin:10px 0}.showcase-head p{color:var(--stone)}
.showcase-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}.showcase-grid figure{margin:0;aspect-ratio:4/5;background:#fff;border:1px solid var(--rule);border-radius:7px;overflow:hidden}.showcase-grid img{width:100%;height:100%;object-fit:contain;transition:transform .3s}.showcase-grid figure:hover img{transform:scale(1.05)}
.showcase-grid a{display:block;width:100%;height:100%}
.original-tools{padding:92px 0;background:#211f1c;color:#f5f1e9}.original-tools .sec{max-width:820px;margin-bottom:35px}.original-tools .sec p{color:#beb7aa}.original-tools .eyebrow{color:#dd8b77!important}.original-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:#555047;border:1px solid #555047}.original-grid article{padding:34px;background:#211f1c}.original-grid span{font:12px var(--mono);color:#de9d86}.original-grid h3{font-size:27px;margin:20px 0}.original-grid p{font-size:15px;color:#c6bfb4;line-height:1.7;min-height:175px}.original-grid a{color:#f0b09a;text-decoration:underline;text-underline-offset:5px;font-size:14px}
@media(max-width:800px){.manual-grid,.use-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.manual-layout{grid-template-columns:1fr;gap:24px}.manual-toc{position:static;max-height:none;display:flex;flex-wrap:wrap;gap:10px}.manual-toc strong{width:100%}.showcase-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:800px){.original-grid{grid-template-columns:1fr}.original-grid p{min-height:0}}
@media(max-width:520px){.manual-grid,.use-grid{grid-template-columns:1fr}.showcase-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.showcase,.use-cases,.original-tools{padding:55px 0}}

.hdr {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(242, 242, 239, 0.86);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--rule);
}

.hdr-in {
  display: flex;
  align-items: center;
  height: 74px;
}

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

.seal { display: block; line-height: 0; }
.seal svg { display: block; }

.brand-txt { display: flex; flex-direction: column; line-height: 1.15; }
.brand-txt b {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.brand-txt i {
  font-style: normal;
  font-size: 10px;
  letter-spacing: 0.09em;
  color: var(--stone-2);
  text-transform: uppercase;
  margin-top: 1px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-left: auto;
  margin-right: 28px;
  font-size: 14.5px;
}
.nav a {
  color: var(--stone);
  padding: 4px 0;
  position: relative;
  transition: color 0.15s;
}
.nav a:hover { color: var(--ink); }
.nav a[aria-current="page"] { color: var(--ink); }
.nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--verm);
}

/* ── 语言菜单 ───────────────────────────────────────────── */

.lang { position: relative; flex: 0 0 auto; }

.lang-btn {
  display: flex;
  align-items: center;
  gap: 7px;
  height: 36px;
  padding: 0 11px;
  border: 1px solid var(--rule);
  border-radius: 2px;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-size: 13.5px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.lang-btn:hover { border-color: var(--stone-2); background: #fff; }
.ico-globe, .ico-chev { width: 14px; height: 14px; flex: 0 0 auto; }
.ico-globe { color: var(--stone); }
.ico-chev { color: var(--stone-2); transition: transform 0.18s; }
.lang[data-open] .ico-chev { transform: rotate(180deg); }

.lang-list {
  position: absolute;
  right: 0;
  top: calc(100% + 9px);
  min-width: 186px;
  margin: 0;
  padding: 5px;
  list-style: none;
  background: #fff;
  border: 1px solid var(--rule);
  box-shadow: 0 24px 48px -24px rgba(22, 19, 15, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-5px);
  transition: opacity 0.16s, transform 0.16s, visibility 0.16s;
}
.lang[data-open] .lang-list {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.lang-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 10px;
  font-size: 14px;
  border-radius: 1px;
  transition: background 0.12s;
}
.lang-list a:hover { background: var(--paper); }
.lang-list .ico-tick {
  width: 12px;
  height: 12px;
  opacity: 0;
  color: var(--verm);
  flex: 0 0 auto;
}
.lang-list [aria-selected="true"] .ico-tick { opacity: 1; }
.lang-list [aria-selected="true"] .lang-nm { font-weight: 600; }

/* ── 按钮 ───────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 26px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: background 0.16s, color 0.16s, border-color 0.16s, transform 0.16s;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn-main {
  background: var(--verm);
  color: #FFF8F4;
}
.btn-main:hover { background: var(--verm-dk); }

.btn-ghost {
  border-color: var(--rule);
  color: var(--ink);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--ink); background: #fff; }

.btn-line {
  border-color: var(--ink);
  color: var(--ink);
  background: transparent;
}
.btn-line:hover { background: var(--ink); color: var(--paper); }

.btn-solid {
  background: var(--verm);
  color: #FFF8F4;
}
.btn-solid:hover { background: #C0463A; }

.btn-off {
  background: transparent;
  border-color: #4A453D;
  color: #7E786E;
  cursor: not-allowed;
}

/* ── 首屏 ───────────────────────────────────────────────── */

.hero { padding: 76px 0 84px; }

.hero-in {
  display: grid;
  grid-template-columns: 1.22fr 0.78fr;
  gap: 52px;
  align-items: center;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--verm);
  margin-bottom: 26px;
}

.h1 {
  font-size: clamp(34px, 4.2vw, 60px);
  line-height: 1.14;
  font-weight: 600;
  letter-spacing: -0.018em;
  margin-bottom: 26px;
}
.h1 .l1, .h1 .l2 { display: block; }
.h1 .l1 { font-weight: 500; }
.h1 .l2 { font-weight: 700; }

.lede {
  font-size: 17px;
  line-height: 1.74;
  color: var(--stone);
  max-width: 40em;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.note {
  margin-top: 18px;
  font-size: 13px;
  color: var(--stone-2);
  letter-spacing: 0.01em;
}

.hero-art { padding-top: 6px; }
.hero-real{margin:0}.hero-real a{display:block;border:7px solid #fff;border-radius:8px;background:#15191f;box-shadow:0 24px 48px #16130f2d;overflow:hidden}.hero-real img{display:block;width:100%;height:auto}.hero-real figcaption{font-size:12px;line-height:1.5;color:var(--stone);margin-top:11px}

.cvs {
  display: block;
  width: 100%;
  height: auto;
}

/* ── 数字条 ─────────────────────────────────────────────── */

.stats { padding: 0 0 8px; }

.stats-in {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.stat {
  padding: 26px 24px 26px 0;
}
.stat + .stat { padding-left: 24px; border-left: 1px solid var(--rule); }

.stat b {
  display: block;
  font-family: var(--serif);
  font-size: 30px;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.01em;
}
.stat span {
  display: block;
  margin-top: 7px;
  font-size: 12.5px;
  color: var(--stone-2);
  line-height: 1.45;
}

/* ── 章节头 ─────────────────────────────────────────────── */

.sec h2 {
  position: relative;
  padding-top: 26px;
  font-size: clamp(26px, 2.7vw, 34px);
  line-height: 1.24;
}
.sec h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 26px;
  height: 3px;
  background: var(--verm);
}
.sec p {
  margin-top: 14px;
  font-size: 16px;
  color: var(--stone);
  max-width: 46ch;
  line-height: 1.7;
}

/* ── 能力 ───────────────────────────────────────────────── */

.feat { padding: 92px 0 0; }

.feat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 64px;
  margin-top: 46px;
  border-bottom: 1px solid var(--rule);
}

.feat-row {
  display: grid;
  grid-template-columns: 26px 1fr;
  grid-template-rows: auto auto;
  column-gap: 18px;
  row-gap: 7px;
  padding: 30px 0;
  border-top: 1px solid var(--rule);
}

.fi {
  grid-row: 1 / span 2;
  align-self: start;
  margin-top: 3px;
  color: var(--verm);
}
.fi svg { display: block; width: 26px; height: 26px; }

.feat-row h3 {
  font-size: 19px;
  font-weight: 600;
  line-height: 1.35;
}
.feat-row p {
  font-size: 15px;
  line-height: 1.68;
  color: var(--stone);
}

/* ── 帮助 ───────────────────────────────────────────────── */

.help { padding: 100px 0 0; }

.help-in {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 72px;
  align-items: start;
}

.help-points { margin: 34px 0 34px; }

.help-points > div {
  padding: 18px 0;
  border-top: 1px solid var(--rule);
}

.help-points dt {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}
.help-points dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.66;
  color: var(--stone);
}

.help-shot {
  margin: 0;
  padding: 12px;
  background: var(--card);
  border: 1px solid var(--rule);
}
.help-shot img {
  display: block;
  width: 100%;
  border: 1px solid var(--rule-2);
}
.help-shot figcaption {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--stone-2);
  padding: 12px 2px 1px;
}

/* ── 素材 ───────────────────────────────────────────────── */

.as { padding: 104px 0 0; }

.as-in {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 68px;
  align-items: center;
}

.as-license {
  margin: 26px 0 30px;
  padding-left: 16px;
  border-left: 2px solid var(--verm);
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--stone-2);
  max-width: 40ch;
}

.as-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  align-items: start;
}

.as-tile {
  border: 1px solid var(--rule);
  background: var(--card);
  overflow: hidden;
  aspect-ratio: 200 / 260;
}
.as-tile svg { display: block; width: 100%; height: 100%; }
.as-tile:nth-child(2) { transform: translateY(24px); }
.as-tile:nth-child(3) { transform: translateY(9px); }

/* ── 下载 ───────────────────────────────────────────────── */

.dl {
  margin-top: 104px;
  padding: 84px 0 88px;
  background: var(--ink);
  color: #F2F2EF;
}

.dl-in {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 72px;
  align-items: start;
}

.dl h2 {
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.2;
}

.dl-lede {
  margin-top: 16px;
  font-size: 16px;
  line-height: 1.7;
  color: #A9A49B;
  max-width: 38ch;
}

.dl-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: 30px 0 34px;
  padding: 0;
  list-style: none;
  font-family: var(--mono);
  font-size: 12px;
  color: #8E8980;
}
.dl-meta li { position: relative; }
.dl-meta li + li::before {
  content: "/";
  position: absolute;
  left: -13px;
  color: #4A453D;
}

.dl-note {
  margin-top: 14px;
  font-size: 12.5px;
  color: #7E786E;
}

.dl-req {
  padding-left: 32px;
  border-left: 1px solid #37322B;
}
.dl-req h3 {
  font-size: 15px;
  font-weight: 600;
  color: #F2F2EF;
  margin-bottom: 12px;
  letter-spacing: 0;
  font-family: var(--sans);
}
.dl-req p {
  font-size: 14px;
  line-height: 1.75;
  color: #9A948A;
}

/* ── 页脚 ───────────────────────────────────────────────── */

.ft {
  padding: 68px 0 30px;
  background: var(--paper);
}

.ft-in {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 46px;
  border-bottom: 1px solid var(--rule);
}

.ft-brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 600;
}
.ft-brand svg { display: block; flex: 0 0 auto; }

.ft-tag {
  margin-top: 14px;
  font-size: 13.5px;
  color: var(--stone-2);
  max-width: 26ch;
  line-height: 1.6;
}

.ft-col h4 {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--stone-2);
  margin-bottom: 14px;
  text-transform: none;
}
.ft-col a {
  display: block;
  font-size: 13.5px;
  color: var(--stone);
  padding: 3px 0;
  transition: color 0.14s;
  word-break: break-all;
}
.ft-col a:hover { color: var(--ink); }
.ft-col a.on { color: var(--verm); }

.ft-base {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  justify-content: space-between;
  padding-top: 22px;
  font-size: 12px;
  color: var(--stone-2);
}

/* ── 内页通用 ───────────────────────────────────────────── */

.page-hd { padding: 72px 0 44px; }
.page-hd .sec h2 { font-size: clamp(30px, 3.4vw, 44px); }
.page-hd .sec p { max-width: 52ch; font-size: 17px; }

.empty {
  padding: 64px 0 80px;
  color: var(--stone);
  font-size: 15px;
}

/* 会员表单 */

.panel {
  max-width: 460px;
  padding: 34px 34px 30px;
  background: var(--card);
  border: 1px solid var(--rule);
}

.field { margin-bottom: 18px; }
.field label {
  display: block;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--stone-2);
  margin-bottom: 7px;
}
.field input {
  width: 100%;
  height: 44px;
  padding: 0 13px;
  border: 1px solid var(--rule);
  border-radius: 1px;
  background: #FDFDFC;
  font: inherit;
  font-size: 15px;
  color: var(--ink);
  transition: border-color 0.15s, background 0.15s;
}
.field input:focus {
  outline: none;
  border-color: var(--ink);
  background: #fff;
}

.alert {
  margin-bottom: 20px;
  padding: 11px 14px;
  font-size: 13.5px;
  line-height: 1.55;
  border-left: 2px solid var(--verm);
  background: #FBF1EF;
  color: var(--verm-dk);
}
.alert.ok {
  border-left-color: #2F6B4F;
  background: #F0F6F2;
  color: #255741;
}

.member-box {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding: 22px 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  font-size: 14px;
}
.member-box b { font-family: var(--serif); font-size: 17px; }
.member-box span { color: var(--stone-2); font-size: 13px; }

/* ── 帮助中心 ───────────────────────────────────────────── */

.hc { padding-bottom: 40px; }

.hc-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--ink);
}

.hc-search {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 1 320px;
}
.hc-search svg { width: 15px; height: 15px; color: var(--stone-2); flex: 0 0 auto; }
.hc-search input {
  width: 100%;
  padding: 4px 0 6px;
  border: 0;
  border-bottom: 1px solid transparent;
  background: transparent;
  font: inherit;
  font-size: 15px;
  color: var(--ink);
}
.hc-search input::placeholder { color: var(--stone-2); }
.hc-search input:focus { outline: none; border-bottom-color: var(--verm); }

.hc-meta {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--stone-2);
}

.hc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 56px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hc-item {
  display: grid;
  grid-template-columns: 34px 1fr auto;
  align-items: baseline;
  gap: 12px;
  padding: 15px 0;
  border-bottom: 1px solid var(--rule);
  transition: background 0.12s;
}
.hc-item[hidden] { display: none; }

.hc-no {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--stone-2);
  letter-spacing: 0.04em;
}
.hc-tt { font-size: 15.5px; line-height: 1.45; }
.hc-n {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--stone-2);
  white-space: nowrap;
}

.hc-empty {
  padding: 40px 0;
  color: var(--stone);
  font-size: 15px;
}

.hc-wip {
  margin-top: 34px;
  padding: 16px 18px;
  border-left: 2px solid var(--verm);
  background: #FBF9F6;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--stone);
  max-width: 62ch;
}

/* ── 素材库 ─────────────────────────────────────────────── */

.lib { padding-bottom: 90px; }

.lib-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--rule);
}

.chip {
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding: 0 14px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-size: 13px;
  color: var(--stone);
  transition: all 0.14s;
}
.chip:hover { border-color: var(--stone-2); color: var(--ink); }
.chip.on { background: var(--ink); border-color: var(--ink); color: var(--paper); }

.lib-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 22px;
  margin-top: 28px;
}

.card {
  border: 1px solid var(--rule);
  background: var(--card);
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s, transform 0.15s;
}
.card:hover { border-color: var(--stone-2); transform: translateY(-2px); }

.card-th {
  display: block;
  position: relative;
  aspect-ratio: 4 / 3;
  background: #F7F6F3;
  overflow: hidden;
}
.card-th img { width: 100%; height: 100%; object-fit: cover; display: block; }

.card-ph {
  display: block;
  width: 100%;
  height: 100%;
  background:
    repeating-linear-gradient(135deg, transparent 0 9px, rgba(169, 50, 38, 0.05) 9px 10px),
    #F7F6F3;
}

.card-lock {
  position: absolute;
  left: 10px;
  top: 10px;
  padding: 3px 8px;
  background: rgba(22, 19, 15, 0.82);
  color: #F2F2EF;
  font-size: 11px;
  letter-spacing: 0.03em;
}

.card-bd { padding: 14px 15px 15px; display: flex; flex-direction: column; flex: 1; }
.card-bd h3 { font-size: 15px; font-weight: 600; line-height: 1.4; }
.card-meta {
  margin-top: 5px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--stone-2);
}

.card-ft {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 14px;
}

.tag {
  display: inline-block;
  font-size: 11px;
  padding: 2px 7px;
  border: 1px solid var(--rule);
  color: var(--stone);
}
.tag-free { border-color: #C9D6DC; color: #2E5E6E; background: #EEF4F6; }
.tag-mem { border-color: #DCC8C2; color: var(--verm); background: #FBF1EF; }

.card-a {
  font-size: 13px;
  color: var(--ink);
  border-bottom: 1px solid var(--verm);
  padding-bottom: 1px;
}

.lib-empty {
  padding: 68px 0 56px;
  text-align: center;
}
.lib-empty svg { width: 104px; height: 104px; margin: 0 auto 22px; display: block; }
.lib-empty p { font-size: 14.5px; color: var(--stone); max-width: 40ch; margin: 0 auto; }

.lib-note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 44px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
}
.lib-note p {
  font-size: 13px;
  color: var(--stone-2);
  max-width: 52ch;
  line-height: 1.65;
}

/* ── 下载页 ─────────────────────────────────────────────── */

.dpg { padding-bottom: 96px; }

.dlbox {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 0;
  background: var(--ink);
  color: #F2F2EF;
}

.dlbox-main { padding: 46px 44px 48px; }
.dlbox-v {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--verm);
  margin-bottom: 14px;
}
.dlbox-main h3 {
  font-size: clamp(24px, 2.6vw, 32px);
  font-weight: 600;
  line-height: 1.25;
}
.dlbox-note { margin-top: 14px; font-size: 12.5px; color: #7E786E; }

.dlbox-req {
  padding: 46px 44px 48px;
  border-left: 1px solid #37322B;
}
.dlbox-req h4 {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: #F2F2EF;
  margin-bottom: 14px;
}
.dlbox-req p {
  font-size: 14px;
  line-height: 1.78;
  color: #9A948A;
}

.sha {
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid #37322B;
}
.sha span {
  display: block;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: #7E786E;
  margin-bottom: 7px;
}
.sha code {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.6;
  color: #C9C3B8;
  word-break: break-all;
}

/* ── 会员页 ─────────────────────────────────────────────── */

.mpage { padding-bottom: 100px; }

.mp-kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--stone-2);
  margin-bottom: 8px;
}
.mp-mail {
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 600;
  word-break: break-all;
  margin-bottom: 22px;
}
.mp-note { margin: 22px 0 26px; font-size: 14px; color: var(--stone); }
.mp-acts { display: flex; flex-wrap: wrap; gap: 10px; }
.mp-acts form { display: contents; }

.mp-hint {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
  font-size: 13px;
  line-height: 1.6;
  color: var(--stone-2);
}
.mp-hint a { color: var(--verm); border-bottom: 1px solid currentColor; }

/* ── 404 ────────────────────────────────────────────────── */

.nf { padding: 110px 0 140px; }
.nf-code {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--verm);
  margin-bottom: 18px;
}
.nf h1 { font-size: clamp(28px, 3.4vw, 42px); line-height: 1.22; max-width: 18ch; }
.nf-body { margin: 16px 0 30px; font-size: 16px; color: var(--stone); }

/* ── 响应式 ─────────────────────────────────────────────── */

@media (max-width: 1040px) {
  .hero-in { grid-template-columns: 1.15fr 0.85fr; gap: 40px; }
  .help-in, .as-in, .dl-in { gap: 48px; }
  .feat-grid { column-gap: 44px; }
  .ft-in { grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 28px; }
}

@media (max-width: 900px) {
  :root { --pad: 24px; }

  .nav a:nth-child(1),
  .nav a:nth-child(2),
  .nav a:nth-child(3) { display: none; }
  .nav { gap: 0; margin-right: 20px; }

  .hero { padding: 52px 0 64px; }
  .hero-in { grid-template-columns: 1fr; gap: 44px; }
  .hero-art { order: 2; max-width: 720px; }
  .h1 { font-size: clamp(32px, 7.4vw, 48px); }

  .stats-in { grid-template-columns: 1fr 1fr; }
  .stat { padding: 22px 20px 22px 0; }
  .stat:nth-child(3) { padding-left: 0; border-left: 0; }
  .stat:nth-child(3), .stat:nth-child(4) { border-top: 1px solid var(--rule); }
  .stat:nth-child(4) { padding-left: 20px; }

  .feat { padding-top: 68px; }
  .feat-grid { grid-template-columns: 1fr; border-bottom: 0; }
  .feat-row { border-bottom: 1px solid var(--rule); }

  .help { padding-top: 72px; }
  .help-in { grid-template-columns: 1fr; gap: 40px; }
  .help-shot { order: -1; }

  .as { padding-top: 76px; }
  .as-in { grid-template-columns: 1fr; gap: 40px; }
  .as-tile:nth-child(2), .as-tile:nth-child(3) { transform: none; }

  .dl { margin-top: 76px; padding: 60px 0 64px; }
  .dl-in { grid-template-columns: 1fr; gap: 40px; }
  .dl-req { padding-left: 0; padding-top: 26px; border-left: 0; border-top: 1px solid #37322B; }

  .ft-in { grid-template-columns: 1fr 1fr; gap: 32px; }
  .ft-lead { grid-column: 1 / -1; }

  .hc-grid { grid-template-columns: 1fr; column-gap: 0; }
  .hc-bar { align-items: flex-start; flex-direction: column; gap: 12px; }
  .hc-search { flex: 1 1 auto; width: 100%; max-width: 100%; }

  .dlbox { grid-template-columns: 1fr; }
  .dlbox-main { padding: 34px 26px 30px; }
  .dlbox-req { padding: 28px 26px 34px; border-left: 0; border-top: 1px solid #37322B; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .brand-txt i { display: none; }
  .hdr-in { height: 62px; }
  .lang-btn span { display: none; }
  .lang-btn { padding: 0 9px; }
  .cta { flex-direction: column; align-items: stretch; }
  .cta .btn { width: 100%; }
  .ft-in { grid-template-columns: 1fr 1fr; }
  .ft-col:last-child { grid-column: 1 / -1; }
  .ft-base { flex-direction: column; gap: 6px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}
/* Full mobile navigation: every destination stays reachable at a comfortable tap size. */
.nav-toggle{display:none}
@media (max-width:900px){
  .hdr-in{position:relative}
  .brand{min-width:0}
  .brand-txt{min-width:0}
  .brand-txt b{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .nav-toggle{display:flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;width:44px;height:44px;margin-left:auto;margin-right:12px;flex:0 0 44px;border:1px solid var(--rule);background:transparent;color:var(--ink);cursor:pointer}
  .nav-toggle span{display:block;width:19px;height:2px;background:currentColor;border-radius:1px}
  .nav-toggle:focus-visible,.nav a:focus-visible,.lang-btn:focus-visible{outline:2px solid var(--verm);outline-offset:2px}
  .nav{display:none;position:absolute;z-index:51;top:calc(100% + 1px);left:0;right:0;margin:0;padding:8px;background:#fff;border:1px solid var(--rule);box-shadow:0 20px 36px -20px rgba(22,19,15,.3);flex-direction:column;align-items:stretch;gap:0}
  .nav[data-open]{display:flex}
  .nav a,.nav a:nth-child(1),.nav a:nth-child(2),.nav a:nth-child(3){display:flex;align-items:center;min-height:48px;padding:10px 14px;font-size:15px}
  .nav a[aria-current="page"]{background:var(--paper)}
  .nav a[aria-current="page"]::after{left:auto;right:10px;top:13px;bottom:13px;width:2px;height:auto}
  .lang{z-index:52}
  .lang-btn{min-width:44px;min-height:44px;justify-content:center}
  .lang-list a{min-height:44px}
}
@media (max-width:560px){
  .nav-toggle{margin-right:8px}
  .nav{left:0;right:0}
}

/* ── 帮助中心 · 左目录 / 右正文（与软件端 help_window 同构） ────────── */
.doc-crumb{border-bottom:1px solid var(--rule);background:var(--card);padding:16px 0}
.doc-crumb .wrap{display:flex;align-items:baseline;justify-content:space-between;gap:20px;flex-wrap:wrap}
.doc-crumb .eyebrow{margin:0}
.doc-crumb .eyebrow a{color:var(--stone);text-decoration:underline;text-underline-offset:4px}
.doc-crumb .eyebrow a:hover{color:var(--verm)}
.doc-crumb-stat{font:12px var(--mono);color:var(--stone-2);white-space:nowrap}

.doc-shell{display:grid;grid-template-columns:288px minmax(0,1fr);gap:56px;align-items:start;padding-bottom:100px}
.doc-side{position:sticky;top:78px;align-self:start;border-right:1px solid var(--rule)}
.doc-side-in{position:relative;max-height:calc(100vh - 96px);overflow-y:auto;padding:28px 22px 40px 0;scrollbar-width:thin}
.doc-toggle{display:none}
.doc-search{position:relative;margin-bottom:22px}
.doc-search input{width:100%;font:14px var(--sans);color:var(--ink);background:var(--card);border:1px solid var(--rule);border-radius:6px;padding:10px 12px 10px 34px;outline:none}
.doc-search input:focus{border-color:var(--verm);box-shadow:0 0 0 3px #a9322618}
.doc-search input::placeholder{color:var(--stone-2)}
.doc-search:before{content:'';position:absolute;left:12px;top:50%;width:11px;height:11px;margin-top:-8px;border:1.5px solid var(--stone-2);border-radius:50%}
.doc-search:after{content:'';position:absolute;left:22px;top:50%;width:5px;height:1.5px;margin-top:3px;background:var(--stone-2);transform:rotate(45deg)}
.doc-side-label{font:11px var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--stone-2);margin:0 0 12px}
.doc-tree{display:grid;gap:2px}
.doc-ch{margin-left:-2px;border-left:2px solid transparent}
.doc-ch.is-active{border-left-color:var(--verm)}
.doc-ch-link{display:flex;gap:10px;align-items:baseline;padding:7px 8px 7px 12px;font-size:14px;line-height:1.45;color:var(--ink-2);border-radius:0 5px 5px 0}
.doc-ch-link:hover{background:#e9e6df;color:var(--ink)}
.doc-ch.is-active .doc-ch-link{background:#e9e6df;color:var(--ink);font-weight:600}
.doc-num{flex:none;font:11px var(--mono);color:var(--stone-2)}
.doc-ch.is-active .doc-num{color:var(--verm)}
.doc-ch-title{overflow-wrap:anywhere}
.doc-sub{display:none;padding:2px 0 10px 34px}
.doc-sub[data-open="1"]{display:grid;gap:1px}
.doc-tp{display:block;font-size:13px;line-height:1.5;color:var(--stone);padding:4px 8px;border-left:1px solid var(--rule);overflow-wrap:anywhere}
.doc-tp:hover{color:var(--verm);border-left-color:var(--verm)}
.doc-tp.on{color:var(--ink);border-left-color:var(--verm);font-weight:600}
.doc-ch[hidden],.doc-tp[hidden],.doc-empty[hidden]{display:none}
.doc-empty{font-size:13px;color:var(--stone);padding:10px 12px}

.doc-main{min-width:0;max-width:800px;padding-top:38px}
.doc-intro h1{font-size:clamp(34px,4vw,52px);margin:0 0 18px}
.doc-lede{font-size:18px;line-height:1.75;color:var(--ink-2);max-width:60ch;margin-bottom:16px}
.doc-pick{font-size:15px;color:var(--stone);margin-bottom:26px}
.doc-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--rule);border:1px solid var(--rule);border-radius:8px;overflow:hidden;margin-top:56px}
.doc-cards>div{background:var(--card);padding:24px 22px}
.doc-cards h3{font-size:19px;margin-bottom:10px}
.doc-cards p{font-size:13.5px;color:var(--stone);line-height:1.65}
.doc-article-hd{margin-bottom:38px;padding-bottom:26px;border-bottom:2px solid var(--verm)}
.doc-article-hd h1{font-size:clamp(32px,3.6vw,46px);margin-bottom:12px}
.doc-article-hd p{font-size:15px;color:var(--stone)}
.doc-pager{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:8px 0 34px}
.doc-pager-item{display:flex;flex-direction:column;gap:5px;padding:16px 18px;background:var(--card);border:1px solid var(--rule);border-radius:7px;transition:border-color .18s}
.doc-pager-item:hover{border-color:var(--verm)}
.doc-pager-item.is-next{text-align:right;align-items:flex-end}
.doc-pager-item span{font:11px var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--verm)}
.doc-pager-item strong{font-family:var(--serif);font-size:17px;font-weight:600;line-height:1.35;overflow-wrap:anywhere}

@media(max-width:1040px){.doc-shell{grid-template-columns:250px minmax(0,1fr);gap:36px}}
@media(max-width:900px){
  .doc-shell{grid-template-columns:1fr;gap:0;padding-bottom:70px}
  .doc-side{position:static;border-right:0;border-bottom:1px solid var(--rule);margin:0 calc(-1 * var(--pad));padding:0 var(--pad)}
  .doc-side-in{max-height:none;overflow:visible;padding:14px 0 0}
  .doc-toggle{display:flex;align-items:center;gap:10px;width:100%;background:none;border:0;padding:8px 0 14px;font:600 14px var(--sans);color:var(--ink);cursor:pointer}
  .doc-toggle-ico{position:relative;width:16px;height:10px;border-top:2px solid var(--ink);border-bottom:2px solid var(--ink)}
  .doc-toggle-ico:after{content:'';position:absolute;left:0;right:0;top:4px;border-top:2px solid var(--ink)}
  .doc-search{margin-bottom:14px}
  .doc-side-label{display:none}
  .doc-tree{max-height:0;overflow:hidden;transition:max-height .25s ease}
  .doc-side[data-open="1"] .doc-tree{max-height:60vh;overflow-y:auto;padding-bottom:20px}
  .doc-main{padding-top:28px}
}
@media(max-width:620px){
  .doc-crumb-stat{display:none}
  .doc-cards{grid-template-columns:1fr;margin-top:36px}
  .doc-pager{grid-template-columns:1fr}
  .doc-pager-item.is-next{text-align:left;align-items:flex-start}
}