/* BP向导 · 商业计划书撰写指南 文章版式 v2
   风格基准：站内 /guide/guide.css（同一套品牌 token），仅新增文章阅读所需组件。
   品牌蓝 #4D6BFE / 深 #3350E0 / 浅 #EDF2FF；CTA 橙 #F57C00；页脚深蓝 #081F36。 */

:root{
  --primary:#4D6BFE;
  --primary-dark:#3350E0;
  --primary-light:#EDF2FF;
  --primary-50:#F5F8FF;
  --accent:#F57C00;
  --accent-soft:#FFF3E4;
  --ink:#0E1428;
  --ink-2:#141C33;
  --text:#4A5369;
  --text-light:#7C8498;
  --border:#E7EAF2;
  --bg:#FFFFFF;
  --bg-soft:#F6F7FB;
  --nav-h:60px;
  --radius:16px;
  --radius-sm:10px;
  --shadow-sm:0 2px 8px rgba(20,30,60,.04);
  --shadow:0 16px 40px rgba(20,34,80,.07);
  --shadow-lg:0 30px 80px rgba(20,34,80,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font:-apple-system,BlinkMacSystemFont,"SF Pro SC","PingFang SC","HarmonyOS Sans SC","MiSans","Microsoft YaHei","Hiragino Sans GB",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--font);font-size:16.5px;line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--accent)}
.wrap{width:min(780px,calc(100% - 40px));margin:0 auto}

/* ── 顶栏：1:1 沿用首页固定导航（顶部透明白字，滚动后白底毛玻璃） ── */
.container{width:min(1200px,calc(100% - 48px));margin:0 auto}
.brand{display:flex;align-items:center;gap:11px;font-weight:700;font-size:19px;letter-spacing:-.01em;color:inherit;flex:none}
.mark{width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,#7B95FF,#3A56E8);display:grid;place-items:center;box-shadow:0 8px 20px rgba(58,86,232,.35),inset 0 1px 0 rgba(255,255,255,.35);flex:none}
.nav{position:fixed;top:0;left:0;right:0;z-index:100;color:#fff;transition:background .3s,box-shadow .3s,color .3s,backdrop-filter .3s}
.nav-inner{height:78px;display:flex;align-items:center;gap:26px}
.nav-links{display:flex;gap:2px;margin-left:8px}
.nav-links a{font-size:14.5px;padding:9px 14px;border-radius:99px;color:rgba(255,255,255,.72);transition:.2s}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,.08)}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:14px}
.nav-login{font-size:14.5px;color:rgba(255,255,255,.8);padding:8px 4px;transition:.2s}
.nav-login:hover{color:#fff}
.nav.scrolled{background:rgba(255,255,255,.86);backdrop-filter:saturate(180%) blur(18px);-webkit-backdrop-filter:saturate(180%) blur(18px);box-shadow:0 1px 0 rgba(16,24,48,.06),0 12px 34px rgba(16,24,48,.06);color:var(--ink)}
.nav.scrolled .nav-links a{color:#5A6378}
.nav.scrolled .nav-links a:hover{color:var(--ink);background:#F0F3FA}
.nav.scrolled .nav-login{color:#5A6378}
.nav.scrolled .nav-login:hover{color:var(--ink)}
.nav-burger{display:none;width:42px;height:42px;border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.06);border-radius:12px;flex-direction:column;align-items:center;justify-content:center;gap:5px;margin-left:auto}
.nav-burger span{display:block;width:17px;height:1.6px;background:#fff;border-radius:2px;transition:.25s}
.nav.scrolled .nav-burger{border-color:#E3E7F0;background:#fff}
.nav.scrolled .nav-burger span{background:#1B2440}
.nav-burger.active span:nth-child(1){transform:translateY(6.6px) rotate(45deg)}
.nav-burger.active span:nth-child(2){opacity:0}
.nav-burger.active span:nth-child(3){transform:translateY(-6.6px) rotate(-45deg)}
.mobile-menu{position:fixed;top:86px;left:16px;right:16px;background:#fff;border-radius:22px;box-shadow:0 30px 70px rgba(16,24,48,.2);padding:10px;z-index:99;opacity:0;visibility:hidden;transform:translateY(-8px);transition:.28s var(--ease);color:var(--ink)}
.mobile-menu.open{opacity:1;visibility:visible;transform:none}
.mobile-menu a{display:block;padding:13px 16px;border-radius:12px;font-size:15px;color:#3C455C}
.mobile-menu a:hover{background:#F4F6FB}
.mobile-menu .btn{width:100%;margin-top:8px;color:#fff}
.btn-sm{padding:10px 18px;font-size:13.5px}
@media (min-width:961px){
  .nav{padding-top:18px;transition:padding .3s var(--ease),background .3s,box-shadow .3s}
  .nav-inner{height:64px;border-radius:999px;border:1px solid rgba(255,255,255,.1);background:rgba(10,14,26,.5);backdrop-filter:saturate(160%) blur(16px);-webkit-backdrop-filter:saturate(160%) blur(16px);padding:0 10px 0 20px;box-shadow:0 14px 40px rgba(0,0,0,.28)}
  .nav.scrolled{padding-top:12px;background:transparent;backdrop-filter:none;-webkit-backdrop-filter:none;box-shadow:none;color:var(--ink)}
  .nav.scrolled .nav-inner{background:rgba(255,255,255,.93);border-color:rgba(16,24,48,.06);box-shadow:0 14px 40px rgba(16,24,48,.12)}
  .nav-links{margin-left:6px}
}
@media (max-width:960px){
  .nav-links{display:none}
  .nav-actions{display:none}
  .nav-burger{display:flex}
}
/* 文章页底色是白的：导航常驻首页「滚动后」形态（桌面=白胶囊，窄屏=白通栏） */
body.bp-doc{padding-top:80px}
body.bp-doc .crumbs{padding-top:26px}
body.bp-doc .nav{color:var(--ink)}
@media (min-width:961px){
  body.bp-doc .nav{padding-top:12px;background:transparent;backdrop-filter:none;-webkit-backdrop-filter:none;box-shadow:none}
  body.bp-doc .nav-inner{height:64px;background:rgba(255,255,255,.93);border:1px solid rgba(16,24,48,.06);box-shadow:0 14px 40px rgba(16,24,48,.12)}
  body.bp-doc .nav-links a{color:#5A6378}
  body.bp-doc .nav-links a:hover{color:var(--ink);background:#F0F3FA}
  body.bp-doc .nav-login{color:#5A6378}
}
@media (max-width:960px){
  body.bp-doc .nav{background:rgba(255,255,255,.86);backdrop-filter:saturate(180%) blur(18px);-webkit-backdrop-filter:saturate(180%) blur(18px);box-shadow:0 1px 0 rgba(16,24,48,.06),0 12px 34px rgba(16,24,48,.06)}
  body.bp-doc .nav-inner{height:64px}
  body.bp-doc .nav-links a{color:#5A6378}
  body.bp-doc .nav-login{color:#5A6378}
  body.bp-doc .nav-burger{border-color:#E3E7F0;background:#fff}
  body.bp-doc .nav-burger span{background:#1B2440}
}

/* ── 面包屑 ── */
.crumbs{font-size:13px;color:var(--text-light);padding:18px 0 0}
.crumbs a{color:var(--text-light)}
.crumbs span{margin:0 6px;color:#B9C4CF}

/* ── 标题层级 ── */
h1{font-size:29px;line-height:1.45;margin:14px 0 14px;color:var(--ink);letter-spacing:-.2px;font-weight:800}
h2{font-size:21px;line-height:1.55;margin:40px 0 14px;color:var(--primary-dark);font-weight:700;
   padding-bottom:9px;border-bottom:1px solid var(--border)}
h3{font-size:17.5px;line-height:1.6;margin:26px 0 10px;color:var(--ink);font-weight:700}
p{margin:0 0 15px}
strong{color:var(--ink);font-weight:700}
ul,ol{margin:0 0 18px;padding-left:22px}
li{margin-bottom:9px}

/* ── 原文自带的「重点提示：」 ── */
.note{
  background:var(--primary-light);border-left:4px solid var(--accent);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  padding:14px 18px;margin:0 0 20px;color:#24425F;
}

/* ── 目录 ── */
.toc{background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius);padding:16px 20px;margin:0 0 30px}
.toc .toc-t{font-size:14px;font-weight:800;color:var(--ink);margin-bottom:8px;letter-spacing:.2px}
.toc ol{margin:0;padding-left:20px;font-size:15px}
.toc li{margin-bottom:5px}
.toc a{color:var(--text)}
.toc-2{list-style:none;padding-left:0}
.toc-2 .lv-h2{margin-top:7px;font-weight:700}
.toc-2 .lv-h2>a{color:var(--primary-dark)}
.toc-2 .lv-h3{padding-left:20px;font-size:14px;color:var(--text-light)}
.toc-2 .lv-h3>a{color:var(--text-light)}

/* ── 上下篇 ── */
.pager{display:flex;flex-wrap:wrap;gap:10px 30px;justify-content:space-between;
       margin:34px 0 0;padding:15px 20px;border:1px solid var(--border);border-radius:var(--radius);
       background:var(--bg-soft);font-size:14.5px}

/* ── 索引列表（支柱页） ── */
ul.idx{list-style:none;padding:0;margin:0 0 6px}
ul.idx li{border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px 16px;margin-bottom:9px;background:#fff}
ul.idx li:hover{border-color:var(--primary)}
ul.idx a{font-size:16px;font-weight:600;color:var(--primary-dark)}
ul.idx .sub{display:block;margin-top:5px;font-size:13.5px;color:var(--text-light);line-height:1.7}

h4{font-size:16px;line-height:1.6;margin:22px 0 8px;color:var(--ink);font-weight:700}
/* ── 要点表 ── */
.tw{overflow-x:auto;margin:0 0 22px;-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;width:100%;min-width:480px;font-size:15px;background:#fff}
th,td{border:1px solid var(--border);padding:11px 13px;text-align:left;vertical-align:top}
th{background:var(--primary);color:#fff;font-weight:700;white-space:nowrap}
tbody tr:nth-child(even){background:var(--bg-soft)}

/* ── 相关链接 ── */
.related{margin:34px 0 0;padding:20px 22px;border:1px solid var(--border);border-radius:var(--radius)}
.related h2{margin:0 0 12px;font-size:17px;border:0;padding:0}
.related ul{margin:0;padding-left:20px}
.related li{margin-bottom:7px;font-size:15px}

/* ── 数据来源脚注 ── */
.cite{font-size:11px;font-weight:700;line-height:0;vertical-align:super}
.cite a{color:var(--primary);text-decoration:none;padding:0 1px}
.cite a:hover{text-decoration:underline}
.cite-src{margin:30px 0 0;padding:18px 20px;border:1px solid var(--border);
          border-radius:var(--radius);background:var(--bg-soft);font-size:13px}
.cite-src h2{margin:0 0 10px;font-size:15px;border:0;padding:0}
.cite-src ol{margin:0;padding-left:20px}
.cite-src li{margin-bottom:6px;line-height:1.75;color:var(--text)}

/* ── 范文索引页列表 ── */
.fw-list{margin:0 0 8px;padding-left:20px}
.fw-list li{margin-bottom:9px;font-size:15px;line-height:1.7}
.fw-list a{color:var(--ink);text-decoration:none}
.fw-list a:hover{color:var(--primary);text-decoration:underline}

/* ── CTA ── */
.cta{margin:26px 0 0;padding:24px;border-radius:var(--radius);
     background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);color:#fff}
.cta h2{margin:0 0 8px;color:#fff;font-size:19px;border:0;padding:0}
.cta p{margin:0 0 16px;color:#DDE5FA;font-size:15px}
.cta .btn{display:inline-block;background:var(--accent);color:#fff;font-weight:700;
          padding:11px 26px;border-radius:var(--radius-sm);font-size:15px}
.cta .btn:hover{background:#E87100;color:#fff}

/* ── 索引页（支柱页）卡片 ── */
.index-head{padding:26px 0 6px}
.index-head p{color:var(--text-light);font-size:15.5px}
.grp{margin:30px 0 0}
.grp>h2{border:0;padding:0;margin:0 0 4px;font-size:19px}
.grp>.d{font-size:14.5px;color:var(--text-light);margin:0 0 14px}
.card-list{list-style:none;padding:0;margin:0;display:grid;gap:12px}
.card{border:1px solid var(--border);border-radius:var(--radius);padding:17px 20px;background:#fff;
      transition:border-color .15s,box-shadow .15s}
.card:hover{border-color:var(--accent);box-shadow:0 4px 16px rgba(58,86,232,.08)}
.card h3{margin:0 0 6px;font-size:16.5px}
.card h3 a{color:var(--primary-dark)}
.card p{margin:0;color:var(--text-light);font-size:14.5px;line-height:1.75}
.card .tag{display:inline-block;background:var(--primary-light);color:var(--primary-dark);font-size:12px;
           font-weight:700;padding:2px 9px;border-radius:20px;margin-bottom:8px}
.card .tag.c{background:var(--accent-soft);color:#8A5A00}

/* ── 页脚：与 /guide 一致 ── */
/* ── 页脚：1:1 沿用首页白底页脚 ── */
.footer{background:#fff;border-top:1px solid #EBEEF5;padding:56px 0 28px;margin-top:56px}
.footer-grid{display:grid;grid-template-columns:1.4fr repeat(4,.65fr);gap:36px}
.footer-brand p{font-size:12.5px;color:#8B93A8;line-height:1.85;max-width:270px;margin:14px 0 0}
.footer-brand .brand{color:#101830}
.footer h5{font-size:12px;color:#9AA2B6;font-weight:600;letter-spacing:.06em;margin:4px 0 14px}
.footer-col a{display:block;font-size:13px;color:#4B556C;padding:5px 0;transition:.2s;width:max-content}
.footer-col a:hover{color:#3350E0}
.footer-follow .footer-qr{width:118px;height:118px;padding:5px;background:#fff;border:1px solid #EBEEF5;border-radius:8px;display:block}
.footer-follow .footer-qr-note{font-size:11px;color:#8B93A8;margin:9px 0 0}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;border-top:1px solid #F0F2F8;margin-top:44px;padding-top:22px;font-size:11.5px;color:#9AA2B6;flex-wrap:wrap}
.footer-bottom .links{display:flex;gap:18px;flex-wrap:wrap}
.footer-bottom a:hover{color:#3350E0}
@media (max-width:960px){
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .footer{padding-top:44px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand{grid-column:1/-1}
  .footer-bottom{justify-content:flex-start;gap:12px}
  .footer-bottom .links{gap:14px}
}

/* ══════════ 支柱页（/bp/ 栏目首页）══════════
   沿用官网首页 hero 语言：深底、网格、蓝色辉光；正文区宽容器 + 粘性章节导轨。 */

html{overflow-x:clip}
body{overflow-x:clip}
a:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}

.bp-hero{position:relative;isolation:isolate;overflow:hidden;overflow:clip;
         background:#0E1734;color:#fff;padding:150px 0 96px}
.bp-hero::after{content:'';position:absolute;left:50%;bottom:0;transform:translateX(-50%);
                width:1200px;height:320px;pointer-events:none;z-index:0;
                background:radial-gradient(52% 62% at 50% 100%,rgba(61,92,255,.24),rgba(61,92,255,0) 72%);
                filter:blur(28px)}
.bp-hero .hero-bg{position:absolute;inset:0;z-index:0;pointer-events:none}
.bp-hero .hero-bg span{position:absolute;border-radius:50%;filter:blur(80px);opacity:.55}
.bp-hero .g1{width:620px;height:480px;left:50%;top:-260px;transform:translateX(-50%);
             background:radial-gradient(closest-side,rgba(64,92,243,.62),rgba(64,92,243,0))}
.bp-hero .g2{width:520px;height:400px;left:-160px;top:130px;
             background:radial-gradient(closest-side,rgba(42,63,168,.55),rgba(42,63,168,0))}
.bp-hero .g3{width:440px;height:360px;right:-130px;top:40px;
             background:radial-gradient(closest-side,rgba(94,234,255,.22),rgba(94,234,255,0))}
.bp-hero .hero-grid{position:absolute;inset:0;z-index:0;background-size:64px 64px;
  background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  -webkit-mask-image:radial-gradient(ellipse 70% 56% at 50% 8%,#000 30%,transparent 78%);
          mask-image:radial-gradient(ellipse 70% 56% at 50% 8%,#000 30%,transparent 78%)}
.bp-hero-in{position:relative;z-index:2;width:min(1120px,calc(100% - 48px));margin:0 auto;text-align:center}
.bp-hero .crumbs{padding:0;font-size:13px;color:#8B94AC}
.bp-hero .crumbs a{color:#8B94AC}
.bp-hero .crumbs a:hover{color:#fff}
.bp-hero .crumbs span{color:#4A5478}
.bp-hero h1{margin:16px 0 0;font-size:clamp(31px,4.2vw,50px);line-height:1.2;
            letter-spacing:-.028em;font-weight:800;color:#fff}
.bp-hero .hero-stats{display:flex;justify-content:center;align-items:center;flex-wrap:wrap;margin-top:38px}
.bp-hero .hero-stat{padding:0 34px;text-align:center}
.bp-hero .hero-stat + .hero-stat{border-left:1px solid rgba(255,255,255,.1)}
.bp-hero .hero-stat b{display:block;font-size:30px;font-weight:700;letter-spacing:-.02em;
                      color:#fff;font-variant-numeric:tabular-nums;line-height:1.2}
.bp-hero .hero-stat span{font-size:12.5px;color:#8B94AC;letter-spacing:.01em}
.bp-hero .hero-cta{display:flex;justify-content:center;margin-top:32px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;border:0;cursor:pointer;
     border-radius:999px;font-weight:600;line-height:1;white-space:nowrap;text-decoration:none;
     font-family:inherit;transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease)}
.btn-primary{background:linear-gradient(180deg,#6380FF,#405CF3);color:#fff;
             box-shadow:0 14px 34px rgba(64,92,243,.38),inset 0 1px 0 rgba(255,255,255,.28)}
.btn-primary:hover{transform:translateY(-2px);color:#fff;
                   background:linear-gradient(180deg,#718BFF,#4A66F7);
                   box-shadow:0 20px 44px rgba(64,92,243,.46),inset 0 1px 0 rgba(255,255,255,.28)}
.btn-primary:active{transform:translateY(0) scale(.99)}
.btn-md{padding:14px 26px;font-size:14.5px}

body.bp-home .wrap{width:min(1120px,calc(100% - 48px))}
/* ── hero 内版权声明（按钮正下方，深底浅字；左端对齐成方块，整块居中） ── */
.bp-cpr-hero{max-width:800px;margin:22px auto 0;font-size:12px;line-height:1.9;
  color:rgba(255,255,255,.52);text-align:left;text-wrap:balance}
.bp-cpr-hero b{color:rgba(255,255,255,.78);font-weight:700;margin-right:4px}
@media (max-width:720px){
  .bp-cpr-hero{margin-top:18px;text-align:left;font-size:11.5px;line-height:1.85}
}

/* ── 文章页文末版权声明 ── */
.bp-cpr-doc{margin:34px 0 0;padding:14px 18px;background:#F5F7FC;border:1px solid #E7EAF2;
  border-radius:10px;font-size:12.5px;line-height:1.85;color:#5A6378}
.bp-cpr-doc b{color:var(--ink);font-weight:700;margin-right:4px}

.bp-main{width:min(1120px,calc(100% - 48px));margin:0 auto;padding:52px 0 4px;
         display:grid;grid-template-columns:236px minmax(0,1fr);gap:56px;align-items:start}

.bp-rail{position:sticky;top:88px}
.rail-t{font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--text-light);margin-bottom:12px}
.rail-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.rail-list a{display:flex;align-items:baseline;gap:10px;padding:10px 12px;border-radius:10px;
             color:var(--text);font-size:14px;line-height:1.5;transition:background .2s,color .2s}
.rail-list a i{font-style:normal;font-size:11.5px;font-weight:700;color:var(--text-light);
               font-variant-numeric:tabular-nums;letter-spacing:.04em}
.rail-list a span{flex:1;min-width:0}
.rail-list a em{font-style:normal;font-size:12px;color:var(--text-light);font-variant-numeric:tabular-nums}
.rail-list a:hover{background:var(--bg-soft);color:var(--ink)}
.rail-list a.on{background:var(--primary-light);color:var(--primary-dark);font-weight:700}
.rail-list a.on i,.rail-list a.on em{color:var(--primary)}

.ch{scroll-margin-top:88px;margin:0 0 52px}
.ch:last-child{margin-bottom:0}
.ch-head{display:flex;align-items:center;gap:13px;padding-bottom:13px;
         border-bottom:1px solid var(--border);margin-bottom:18px}
.ch-idx{font-size:12px;font-weight:800;letter-spacing:.05em;color:var(--primary);
        background:var(--primary-light);border-radius:8px;padding:6px 9px;line-height:1;flex:none}
.ch-head h2{margin:0;padding:0;border:0;flex:1;min-width:0;overflow-wrap:anywhere;
            font-size:clamp(19px,2vw,23px);line-height:1.4;font-weight:800;
            letter-spacing:-.02em;color:var(--ink)}
.ch-cnt{font-size:12.5px;color:var(--text-light);white-space:nowrap;font-variant-numeric:tabular-nums}

.ch-grid,.trk-grid{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.ch-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.trk-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.doc,.trk-wrap{position:relative;display:flex;height:100%;background:#fff;color:inherit;
          border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px;
          transition:transform .26s var(--ease),box-shadow .26s,border-color .26s}
.doc:hover,.trk-wrap:hover{transform:translateY(-4px);border-color:#CBDAFF;box-shadow:var(--shadow);color:inherit}
.ar{width:18px;height:18px;flex:none;color:#A9B4C8;transition:transform .26s var(--ease),color .26s}
.doc:hover .ar,.trk-wrap:hover .ar{transform:translateX(4px);color:var(--primary)}

.doc{align-items:flex-start;gap:12px}
.doc-n{font-size:11.5px;font-weight:800;color:var(--text-light);font-variant-numeric:tabular-nums;
       padding-top:5px;flex:none}
.doc-t{margin:0;flex:1;min-width:0;overflow-wrap:anywhere;
       font-size:16px;font-weight:600;line-height:1.5;letter-spacing:-.01em;color:var(--ink)}

.trk-wrap{flex-direction:column;gap:0}
.trk{display:block;color:inherit}
.trk .ar{position:absolute;right:20px;top:20px}
.trk-h{display:flex;align-items:flex-start;gap:10px;padding-right:26px}
.trk-n{font-size:11.5px;font-weight:800;color:var(--primary);background:var(--primary-light);
       border-radius:7px;padding:4px 7px;line-height:1;margin-top:2px;flex:none}
.trk-t{margin:0;flex:1;min-width:0;overflow-wrap:anywhere;
       font-size:16px;font-weight:600;line-height:1.5;letter-spacing:-.01em;color:var(--ink)}
.trk-m{margin:10px 0 0;font-size:12.5px;color:var(--text-light);font-variant-numeric:tabular-nums}
.trk-c{list-style:none;margin:10px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.trk-c li{font-size:11.5px;line-height:1.5;background:var(--bg-soft);
          border:1px solid var(--border);border-radius:7px;padding:3px 8px;
          transition:border-color .2s,background .2s}
.trk-c li a{color:#5A6478;text-decoration:none;display:block}
.trk-c li:hover{border-color:#B9CBFF;background:var(--primary-light)}
.trk-c li:hover a{color:var(--primary)}

.js .reveal{opacity:0;transform:translateY(22px);
            transition:opacity .7s var(--ease),transform .7s var(--ease)}
.js .reveal.in{opacity:1;transform:none}

@media (max-width:1080px){ .bp-main{gap:36px} }
@media (max-width:900px){
  .bp-main{grid-template-columns:minmax(0,1fr);gap:22px;padding-top:30px}
  .bp-rail{position:static}
  .rail-t{display:none}
  .rail-list{flex-direction:row;gap:8px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
  .rail-list::-webkit-scrollbar{display:none}
  .rail-list li{flex:none}
  .rail-list a{white-space:nowrap;border:1px solid var(--border);padding:8px 13px;background:#fff}
  .rail-list a em{display:none}
  .rail-list a.on{border-color:var(--primary)}
}
@media (max-width:720px){
  .bp-hero{padding:118px 0 64px}
  .bp-hero .hero-stats{margin-top:28px}
  .bp-hero .hero-stat{padding:0 18px}
  .bp-hero .hero-stat b{font-size:24px}
  .bp-main{width:calc(100% - 40px);padding-top:26px}
  .ch-grid,.trk-grid{grid-template-columns:minmax(0,1fr)}
  .ch{margin-bottom:38px}
  .ch-head{flex-wrap:wrap;gap:10px}
  .ch-cnt{margin-left:auto}
}
@media (max-width:400px){
  .bp-hero .hero-stat{padding:0 12px}
  .bp-hero .hero-stat span{font-size:11.5px}
}
@media (prefers-reduced-motion:reduce){
  .js .reveal{opacity:1;transform:none}
  .doc:hover,.trk-wrap:hover{transform:none}
  .btn-primary:hover{transform:none}
}

/* ── 移动端 ── */
@media (max-width:640px){
  body{font-size:16px;line-height:1.88}
  .wrap{width:calc(100% - 32px)}
  h1{font-size:23px}
  h2{font-size:19px;margin-top:32px}
  .related,.toc,.note,.tw{padding-left:16px;padding-right:16px}
  .cite-src{padding:15px 16px}
  .cta{padding:20px 18px}
}

/* ── 4）商业计划书模板：PPT 逐页幻灯片（竖排卡片 + 灯箱翻页） ── */
.deck{margin:36px 0 0}
.deck-list{display:flex;flex-direction:column;gap:18px}
.deck-item{margin:0}
.deck-shot{display:block;position:relative;width:100%;padding:0;cursor:zoom-in;
  border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-soft);
  box-shadow:var(--shadow-sm);overflow:hidden;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease)}
.deck-shot img{display:block;width:100%;height:auto}
.deck-no{position:absolute;left:12px;top:12px;padding:3px 10px;font-size:12px;line-height:1.6;
  color:#fff;background:rgba(14,20,40,.52);border:1px solid rgba(255,255,255,.18);
  border-radius:999px;backdrop-filter:blur(4px);letter-spacing:.02em}
.deck-zoom{position:absolute;right:12px;bottom:12px;width:34px;height:34px;border-radius:50%;
  display:grid;place-items:center;background:rgba(255,255,255,.94);
  box-shadow:0 2px 10px rgba(20,34,80,.18);opacity:0;transform:translateY(4px);
  transition:opacity .22s var(--ease),transform .22s var(--ease)}
.deck-zoom svg{width:19px;height:19px;fill:none;stroke:var(--ink);stroke-width:1.7;stroke-linecap:round}
.deck-shot:focus-visible{outline:2px solid var(--primary);outline-offset:3px}
@media (hover:hover) and (pointer:fine){
  .deck-shot:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:rgba(77,107,254,.38)}
  .deck-shot:hover .deck-zoom{opacity:1;transform:none}
}
/* 灯箱 */
.lb{position:fixed;inset:0;z-index:200;display:none;place-items:center;
  background:rgba(10,16,34,.88);backdrop-filter:blur(3px);animation:lbIn .18s var(--ease)}
.lb.on{display:grid}
@keyframes lbIn{from{opacity:0}to{opacity:1}}
.lb-img{max-width:min(1180px,92vw);max-height:82vh;border-radius:12px;background:#fff;
  box-shadow:0 30px 80px rgba(0,0,0,.5)}
.lb-bar{position:absolute;top:0;left:0;right:0;height:62px;display:flex;align-items:center;
  justify-content:space-between;padding:0 14px}
.lb-cnt{font-size:14px;color:rgba(255,255,255,.92);letter-spacing:.02em}
.lb-x,.lb-nav{width:44px;height:44px;display:grid;place-items:center;border-radius:50%;
  color:#fff;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);
  cursor:pointer;transition:background .2s var(--ease),transform .2s var(--ease)}
.lb-x svg,.lb-nav svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round}
.lb-x:hover,.lb-nav:hover{background:rgba(255,255,255,.24)}
.lb-x:focus-visible,.lb-nav:focus-visible{outline:2px solid #fff;outline-offset:3px}
.lb-nav{position:absolute;top:50%;transform:translateY(-50%)}
.lb-prev{left:14px}
.lb-next{right:14px}
@media (max-width:640px){
  .deck{margin-top:28px}
  .deck-list{gap:14px}
  .lb-img{max-height:74vh}
  .lb-prev{left:8px}
  .lb-next{right:8px}
}
@media (prefers-reduced-motion:reduce){
  .deck-shot,.deck-zoom,.lb-x,.lb-nav{transition:none}
  .lb{animation:none}
}

/* ── 模板购买（按钮 + 扫码弹层 + 下载态） ── */
.buy-tpl{margin:30px 0 0;padding:26px 24px;text-align:center;
  border:1px solid var(--border);border-radius:var(--radius);background:var(--primary-50)}
.buy-tpl-note{margin:12px 0 0;font-size:13px;color:var(--text-light)}
.buy-mask{position:fixed;inset:0;z-index:210;display:none;place-items:center;
  background:rgba(10,16,34,.7);backdrop-filter:blur(2px);animation:lbIn .18s var(--ease)}
.buy-mask.on{display:grid}
.buy-card{position:relative;width:min(360px,calc(100vw - 40px));padding:30px 26px 26px;
  background:var(--bg);border-radius:var(--radius);box-shadow:var(--shadow-lg);text-align:center}
.buy-x{position:absolute;right:10px;top:10px;width:36px;height:36px;display:grid;place-items:center;
  border:0;border-radius:50%;background:var(--bg-soft);cursor:pointer}
.buy-x svg{width:18px;height:18px;fill:none;stroke:var(--text);stroke-width:1.8;stroke-linecap:round}
.buy-x:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.buy-head{font-size:15px;color:var(--text);font-weight:600}
.buy-amount{margin:8px 0 18px;font-size:30px;font-weight:800;color:var(--ink);letter-spacing:.01em}
.buy-qr{display:flex;justify-content:center;margin-bottom:14px}
.buy-qr svg{width:200px;height:200px}
.buy-ok{margin:4px 0 14px;font-size:16px;font-weight:700;color:#1B7F3B}
.buy-dl{display:flex;width:100%}
.buy-tip{margin:12px 0 0;font-size:13px;color:var(--text-light);line-height:1.7}
.buy-tip.buy-err{color:#C0392B}
@media (prefers-reduced-motion:reduce){.buy-mask{animation:none}}

/* 购买成功后的下载链接（可整段选中复制） */
.buy-link{display:block;margin-top:6px;padding:8px 10px;font-size:12px;line-height:1.6;
  word-break:break-all;color:var(--text);background:var(--bg);
  border:1px dashed var(--border);border-radius:8px;user-select:all}