/* ===== Writer B 页面公共样式（features / format / usecases 共用，各页一份拷贝） ===== */
.doc-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:48px;padding-top:48px;padding-bottom:96px;align-items:start}
.doc-main{min-width:0}
.doc-toc{position:sticky;top:84px;max-height:calc(100vh - 104px);overflow:auto;font-size:14px}
.doc-toc-h{font-size:12.5px;font-weight:600;letter-spacing:1px;color:var(--muted);margin:0 0 10px 12px}
.doc-toc ol{list-style:none;margin:0;padding:0;border-left:1px solid var(--border)}
.doc-toc li a{display:block;padding:6px 12px;margin-left:-1px;border-left:2px solid transparent;color:var(--muted);line-height:1.45}
.doc-toc li a:hover{color:var(--strong);text-decoration:none}
.doc-toc li a.on{color:var(--accent);border-left-color:var(--accent);font-weight:600}
.tg{display:inline-flex;align-items:center;font-size:12px;font-weight:600;padding:1px 9px;border-radius:5px;border:1px solid;white-space:nowrap;line-height:1.6}
.tg.t-free{color:#3B6E39;border-color:#BFD9BD;background:#F5FAF4}
.tg.t-std{color:#005FB8;border-color:#B6D2EE;background:#F2F7FC}
.tg.t-pro{color:#fff;border-color:transparent;background:linear-gradient(90deg,var(--g1),var(--g2))}
.badge{white-space:nowrap}
.doc-main code,.uc code{font-family:var(--mono);font-size:.88em;background:#F0F0F0;padding:0 5px;border-radius:4px;word-break:break-word}
kbd{font-family:var(--mono);font-size:.82em;border:1px solid var(--border-strong);border-bottom-width:2px;border-radius:4px;padding:0 5px;background:#FAFAFA;color:var(--strong)}
.cb{margin:18px 0}
.cb .bar{justify-content:flex-start}
.cb-note{margin-left:auto;font-family:var(--font);font-size:12px;color:var(--muted)}
.cb pre{font-size:13px;line-height:1.7;max-height:none}
.cb pre code{background:none;padding:0;font-size:inherit;word-break:normal}
.cb .c-f{color:#795E26}
.src{font-size:12.5px;color:#8A8A8A;margin-top:-8px}
.doc-main .callout{margin:0 0 24px}
.doc-main .table-wrap{margin:18px 0}
@media (max-width:1024px){
  .doc-layout{grid-template-columns:1fr;gap:0;padding-top:24px}
  .doc-toc{position:static;max-height:none;margin-bottom:28px;border:1px solid var(--border);border-radius:var(--radius);padding:14px 10px 10px;background:var(--bg)}
  .doc-toc ol{border-left:0;display:flex;flex-wrap:wrap;gap:6px}
  .doc-toc li a{border:1px solid var(--border);border-radius:999px;padding:3px 12px;margin:0;background:#fff;font-size:13.5px}
  .doc-toc li a.on{border-color:var(--accent)}
}
@media (max-width:760px){
  .doc-layout{padding-bottom:64px}
  .cb pre{font-size:12px;padding:14px}
}
.page-hero h1 .hl{display:inline-block}
/* ===== format.html ===== */
.page-hero .lead code.fh{font-family:var(--mono);font-size:.92em;background:#EEF4FB;color:var(--accent);padding:0 6px;border-radius:4px}
.fs{padding:52px 0 0;scroll-margin-top:72px}
.fs:first-child{padding-top:0}
.fmt h2{font-size:28px;margin:0 0 14px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.fmt h3{font-size:18.5px;margin:30px 0 10px}
.fmt p{margin:0 0 14px;color:var(--text)}
.fl{margin:0 0 14px;padding-left:0;list-style:none}
.fl li{position:relative;padding-left:22px;margin:7px 0}
.fl li::before{content:"";position:absolute;left:4px;top:.66em;width:7px;height:7px;border-radius:2px;background:var(--accent)}
.fmt-pill-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:22px}
.fmt-pill-grid .card,.fence-grid .card,.ops .card,.deg .card{padding:18px 20px}
.fmt .card h3{margin:0 0 6px;font-size:16px}
.fmt .card p{margin:0}
.fence-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.fence-grid .card:first-child{grid-column:1/-1}
.cite-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}
.cite-grid h3{margin-top:22px}
.ops{display:grid;grid-template-columns:1fr 1.3fr;gap:16px;margin:8px 0}
.clue{margin:4px 0 0;padding-left:22px;color:var(--muted);font-size:14.5px;columns:2;column-gap:24px}
.clue li{margin:3px 0;break-inside:avoid}
.inv{counter-reset:inv;list-style:none;padding:0;margin:0;display:grid;gap:10px}
.inv li{counter-increment:inv;position:relative;padding:12px 16px 12px 52px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface)}
.inv li::before{content:counter(inv);position:absolute;left:14px;top:11px;width:26px;height:26px;border-radius:50%;background:var(--accent-soft);color:var(--accent);font-weight:700;font-size:13px;display:grid;place-items:center}
.deg{margin-bottom:8px}
.fmt-cta{margin-top:56px}

/* 一源四视图示意 */
.fd{margin:26px 0 0;padding:28px;border:1px solid var(--border);border-radius:var(--radius-lg);background:linear-gradient(180deg,#FFFFFF,#F7F9FC);display:grid;grid-template-columns:1fr 56px 1.35fr;grid-template-rows:repeat(4,auto);row-gap:12px;align-items:center}
.fd-src{grid-column:1;grid-row:1/5}
.fd-row{grid-column:3}.r1{grid-row:1}.r2{grid-row:2}.r3{grid-row:3}.r4{grid-row:4}
.fd-c{grid-column:2;align-self:stretch;position:relative;margin:-6px 0}
.fd-c{background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 7 10'%3E%3Cpath d='M0 0L7 5L0 10z' fill='%230078E8'/%3E%3C/svg%3E") no-repeat right center/7px 10px}
.c1{grid-row:1}.c2{grid-row:2}.c3{grid-row:3}.c4{grid-row:4}
.fd-c::before{content:"";position:absolute;left:0;width:0;border-left:2px dashed #7FB2E8}
.c1::before{top:50%;bottom:0}.c2::before,.c3::before{top:0;bottom:0}.c4::before{top:0;height:50%}
.fd-c::after{content:"";position:absolute;left:0;right:6px;top:50%;border-top:2px dashed #7FB2E8}
.fd-src{background:var(--surface);border:1.5px solid var(--accent);border-radius:12px;padding:18px;box-shadow:0 0 0 4px var(--accent-soft)}
.fd-label{font-size:12px;font-weight:700;letter-spacing:1px;color:var(--accent);margin-bottom:10px}
.fd-file{display:flex;gap:10px;align-items:flex-start}
.fd-file svg{width:30px;height:30px;color:var(--accent);flex:none}
.fd-file b,.fd-view b{display:block;color:var(--strong);font-size:15.5px}
.fd small{display:block;color:var(--muted);font-size:12.5px;line-height:1.5}
.fd-layers{display:flex;flex-direction:column;gap:5px;margin:14px 0 10px}
.fd-layers span{font-size:12.5px;padding:5px 10px;border-radius:6px;background:#F3F6FA;border:1px solid #E3EAF3;color:var(--text)}
.fd-layers span:nth-child(2){background:#EEF4FB}
.fd-layers span:nth-child(3){background:#E6F0FA}
.fd .fd-note{font-size:12.5px;color:var(--muted);margin:0}
.fd-row{display:grid;grid-template-columns:1fr 1fr;gap:10px;align-items:center}
.fd-side{font-size:12px;color:var(--muted);text-align:right;padding-right:4px;position:relative}
.fd-side code{font-size:11.5px!important;background:#FFF4E0!important;color:#9A5B00;padding:2px 6px!important}
.fd-side::after{content:"+";position:absolute;right:-9px;top:50%;transform:translateY(-50%);color:#B0B0B0;font-weight:700}
.fd-none::after{content:""}
.fd-view{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:10px 14px;border-left:4px solid var(--accent)}
.fd-view.v2{border-left-color:#3A7BD5}.fd-view.v3{border-left-color:#0090F0}.fd-view.v4{border-left-color:#6C5BD4}
.fd figcaption{grid-column:1/-1;margin-top:20px;font-size:14px;color:var(--muted);text-align:center}
@media (max-width:1180px){
  .fd{grid-template-columns:1fr;grid-template-rows:none}
  .fd-src,.fd-row{grid-column:1;grid-row:auto}
  .fd-src{margin-bottom:22px;position:relative}
  .fd-src::after{content:"";position:absolute;left:50%;bottom:-22px;height:22px;border-left:2px dashed #7FB2E8}
  .fd-c{display:none}
}
@media (max-width:760px){
  .fmt h2{font-size:23px}
  .fd{padding:18px}
  .fd-row{grid-template-columns:1fr;gap:4px}
  .fd-side{text-align:left}
  .fd-side::after{display:none}
  .fmt-pill-grid,.fence-grid,.cite-grid,.ops{grid-template-columns:1fr}
  .clue{columns:1}
}
.fmt-shots{margin-top:26px}
.fmt-shots h3{font-size:16px;margin-bottom:14px}
.fmt-shots .shotg .cap{font-size:13px}