/* ============================================================
   千问办公 · 蓝皮书
   Blueprint Paper Theme — 冷调纸感 / 蓝墨 / 技术制图网格
   ============================================================ */

:root{
  /* 纸与墨 */
  --paper:      #F2F5FA;
  --paper-2:    #E7ECF6;
  --paper-3:    #DDE4F1;
  --card:       #FFFFFF;

  --ink:        #0D1526;
  --ink-2:      #3B4A66;
  --ink-3:      #6B7B97;
  --ink-4:      #9AA8C0;

  --line:       #D3DCEC;
  --line-soft:  #E4EAF5;

  /* 蓝图主色 */
  --blue:       #1E4FD8;
  --blue-d:     #133AAE;
  --blue-l:     #4C7DF5;
  --blue-wash:  #EAF0FE;
  --cyan:       #0A9CBF;
  --violet:     #6A4FE0;
  --amber:      #C77A16;
  --rose:       #C2405C;

  --shadow-s: 0 2px 8px -3px rgba(13,21,38,.14);
  --shadow-m: 0 14px 36px -20px rgba(15,35,90,.35);
  --shadow-l: 0 30px 70px -34px rgba(15,35,90,.45);

  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", Georgia, serif;
  --mono: "JetBrains Mono", "SF Mono", ui-monospace, Menlo, Consolas, monospace;

  --sidebar-w: 288px;
  --toc-w: 212px;
  --content-max: 812px;
  --r: 10px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px;-webkit-text-size-adjust:100%}

body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* 蓝图网格底纹 */
body::before{
  content:"";
  position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:
    linear-gradient(rgba(30,79,216,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30,79,216,.045) 1px, transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 90% 70% at 50% 0%, #000 20%, transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 90% 70% at 50% 0%, #000 20%, transparent 78%);
}

a{color:var(--blue);text-decoration:none}
::selection{background:rgba(30,79,216,.18)}

.mono{font-family:var(--mono);letter-spacing:.05em}
.wrap{max-width:1220px;margin:0 auto;padding:0 32px;position:relative;z-index:1}

.eyebrow{
  font-family:var(--mono);font-size:11.5px;font-weight:600;
  letter-spacing:.24em;text-transform:uppercase;color:var(--blue);
  display:inline-flex;align-items:center;gap:9px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--blue);opacity:.55}

/* ============================================================
   顶部导航（首页 / 通用页）
   ============================================================ */
.topnav{
  position:fixed;top:0;left:0;right:0;z-index:200;height:64px;
  background:rgba(242,245,250,.82);backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;transition:border-color .25s, background .25s;
}
.topnav.stuck{border-bottom-color:var(--line);background:rgba(242,245,250,.94)}
.topnav-in{max-width:1220px;margin:0 auto;padding:0 32px;height:100%;
  display:flex;align-items:center;justify-content:space-between;gap:24px}

.brand{display:flex;align-items:center;gap:11px;color:var(--ink);flex-shrink:0}
.brand-mark{
  width:32px;height:32px;border-radius:9px;flex-shrink:0;
  display:grid;place-items:center;
  overflow:hidden;
}
.brand-mark img{display:block;width:100%;height:100%;object-fit:contain}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:15.5px;font-weight:800;letter-spacing:.01em}
.brand-text span{font-family:var(--mono);font-size:10px;letter-spacing:.16em;color:var(--ink-3)}
.brand-full{height:32px;width:auto;display:block;flex-shrink:0}
.brand-tag{font-family:var(--mono);font-size:10px;letter-spacing:.16em;color:var(--ink-3);border-left:1px solid var(--line);padding-left:10px;margin-left:2px;white-space:nowrap}
@media(max-width:560px){.brand-tag{display:none}}

.nav-links{display:flex;align-items:center;gap:2px;list-style:none;white-space:nowrap}
.nav-links a{
  color:var(--ink-2);font-size:14px;font-weight:500;
  padding:8px 11px;border-radius:8px;transition:.18s;white-space:nowrap;
}
.nav-links a:hover{color:var(--blue-d);background:var(--blue-wash)}

.nav-search{
  display:inline-flex;align-items:center;gap:8px;height:34px;padding:0 12px;
  border:1px solid var(--line);border-radius:8px;background:var(--card);
  color:var(--ink-3);font-size:13px;cursor:pointer;transition:.2s;
}
.nav-search:hover{border-color:var(--blue-l);color:var(--blue-d)}
.nav-search kbd{
  font-family:var(--mono);font-size:10.5px;padding:2px 5px;border-radius:4px;
  background:var(--paper-2);border:1px solid var(--line);color:var(--ink-3);
}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 26px;border-radius:10px;font-weight:650;font-size:15px;
  transition:.22s;cursor:pointer;border:1px solid transparent;white-space:nowrap;
}
.btn-p{background:var(--blue);color:#fff;box-shadow:0 12px 26px -12px rgba(30,79,216,.8)}
.btn-p:hover{background:var(--blue-d);transform:translateY(-2px);box-shadow:0 18px 34px -14px rgba(30,79,216,.8)}
.btn-s{background:var(--card);color:var(--ink);border-color:var(--line)}
.btn-s:hover{border-color:var(--blue-l);color:var(--blue-d);transform:translateY(-2px)}
.btn-sm{padding:9px 18px;font-size:13.5px;border-radius:8px}

/* ============================================================
   首页 Hero
   ============================================================ */
.hero{position:relative;padding:132px 0 62px;overflow:hidden}
.hero::after{
  content:"";position:absolute;top:-160px;right:-140px;width:620px;height:620px;
  background:radial-gradient(circle,rgba(106,79,224,.14),transparent 62%);
  pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:1fr 380px;gap:56px;align-items:end}

.hero h1{
  font-size:clamp(52px,8.4vw,104px);line-height:.94;letter-spacing:-.035em;
  font-weight:800;margin:22px 0 0;
}
.hero h1 .stroke{
  display:block;color:transparent;
  -webkit-text-stroke:1.6px var(--ink-3);
  font-family:var(--serif);font-weight:700;
}
.hero h1 .solid{
  display:block;
  background:linear-gradient(100deg,var(--blue) 0%,var(--violet) 62%,var(--cyan) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-logo{display:block;height:74px;width:auto;margin:26px 0 0}
.hero-sub{
  max-width:560px;margin-top:26px;font-size:16.5px;color:var(--ink-2);line-height:1.85;
}
.hero-sub strong{color:var(--ink);font-weight:700}
.hero-actions{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap}

/* 蓝图卡片 */
.blueprint{
  position:relative;background:var(--card);border:1px solid var(--line);
  border-radius:14px;padding:22px;box-shadow:var(--shadow-m);
  font-family:var(--mono);font-size:12.5px;line-height:2.1;color:var(--ink-2);
}
.blueprint::before{
  content:"";position:absolute;inset:8px;border:1px dashed var(--line);border-radius:8px;
  pointer-events:none;
}
.bp-head{
  display:flex;align-items:center;justify-content:space-between;
  padding-bottom:12px;margin-bottom:12px;border-bottom:1px solid var(--line-soft);
  font-size:10.5px;letter-spacing:.2em;color:var(--ink-4);text-transform:uppercase;
}
.bp-dot{display:inline-flex;gap:5px}
.bp-dot i{width:8px;height:8px;border-radius:50%;background:var(--line);display:block}
.bp-dot i:first-child{background:#E5A0AC}
.bp-dot i:nth-child(2){background:#EBCF95}
.bp-dot i:nth-child(3){background:#9CD3AE}
.blueprint .k{color:var(--blue)}
.blueprint .c{color:var(--ink-4)}
.blueprint .ok{color:#1E8E5A}
.cursor{display:inline-block;width:7px;height:14px;background:var(--blue);
  vertical-align:-2px;animation:blink 1.1s steps(2) infinite}
@keyframes blink{50%{opacity:0}}

/* 数据条 */
.stats{border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.6);backdrop-filter:blur(6px);position:relative;z-index:1}
.stats-in{max-width:1220px;margin:0 auto;padding:0 32px;
  display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:30px 24px;border-left:1px solid var(--line-soft)}
.stat:first-child{border-left:none;padding-left:0}
.stat .n{font-family:var(--mono);font-size:38px;font-weight:700;line-height:1;
  color:var(--ink);letter-spacing:-.03em}
.stat .n em{font-style:normal;color:var(--blue)}
.stat .l{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;
  color:var(--ink-3);margin-top:9px;text-transform:uppercase}

/* 通用 section */
.section{padding:86px 0}
.section h2{
  font-family:var(--serif);font-size:clamp(28px,3.6vw,40px);font-weight:700;
  letter-spacing:-.01em;line-height:1.28;margin:16px 0 12px;
}
.sec-lede{max-width:660px;color:var(--ink-2);font-size:16px}

/* 篇章卡片 */
.parts{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:42px}
.part{
  position:relative;background:var(--card);border:1px solid var(--line);
  border-radius:14px;padding:26px 24px 22px;color:var(--ink);
  transition:.26s cubic-bezier(.2,.7,.3,1);overflow:hidden;
  display:flex;flex-direction:column;
}
.part::after{
  content:"";position:absolute;left:0;top:0;width:100%;height:3px;
  background:linear-gradient(90deg,var(--blue),var(--violet));
  transform:scaleX(0);transform-origin:left;transition:transform .3s;
}
.part:hover{transform:translateY(-4px);border-color:var(--blue-l);box-shadow:var(--shadow-m)}
.part:hover::after{transform:scaleX(1)}
.part .num{
  position:absolute;right:18px;top:14px;font-family:var(--mono);
  font-size:44px;font-weight:700;color:var(--paper-2);line-height:1;letter-spacing:-.04em;
}
.part .tag{font-family:var(--mono);font-size:10.5px;letter-spacing:.2em;
  color:var(--blue);text-transform:uppercase;font-weight:600}
.part h3{font-size:19px;font-weight:750;margin:11px 0 9px;line-height:1.45;letter-spacing:-.01em}
.part p{font-size:14px;color:var(--ink-2);line-height:1.75;flex:1}
.part .meta{display:flex;align-items:center;gap:8px;margin-top:16px;
  padding-top:14px;border-top:1px dashed var(--line);flex-wrap:wrap}
.chip{
  display:inline-block;padding:3px 10px;border-radius:999px;font-size:11.5px;
  background:var(--blue-wash);color:var(--blue-d);font-weight:600;
}
.chip.g{background:#E7F5EE;color:#1B7A50}
.chip.v{background:#F0ECFD;color:#5B41C9}
.part .go{margin-left:auto;font-family:var(--mono);font-size:12px;color:var(--ink-3)}
.part:hover .go{color:var(--blue)}

/* 场景任务入口 */
.tasks{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:34px}
.task{
  display:block;background:transparent;border:1px solid var(--line);border-radius:12px;
  padding:18px 20px;color:var(--ink);transition:.22s;position:relative;
}
.task:hover{background:var(--card);border-color:var(--blue-l);transform:translateY(-3px);
  box-shadow:var(--shadow-s)}
.task .t{font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;color:var(--ink-4);
  text-transform:uppercase}
.task b{display:block;font-size:15.5px;font-weight:700;margin:7px 0 5px}
.task span{font-size:13px;color:var(--ink-3)}

/* 方法论流程 */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:44px;
  border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--card)}
.flow-step{padding:28px 24px;border-left:1px solid var(--line-soft);position:relative}
.flow-step:first-child{border-left:none}
.flow-step .i{font-family:var(--mono);font-size:11px;color:var(--blue);letter-spacing:.2em}
.flow-step h4{font-family:var(--mono);font-size:16px;font-weight:700;margin:12px 0 8px;
  letter-spacing:.02em}
.flow-step p{font-size:13.5px;color:var(--ink-2);line-height:1.7}
.flow-step::after{
  content:"→";position:absolute;right:-9px;top:50%;transform:translateY(-50%);
  width:18px;height:18px;display:grid;place-items:center;color:var(--ink-4);
  background:var(--card);font-size:13px;z-index:2;
}
.flow-step:last-child::after{display:none}

/* CTA */
.cta{
  margin:0 32px 90px;max-width:1220px;
  background:linear-gradient(135deg,#0D1526,#152A5C 55%,#26206B);
  border-radius:20px;padding:64px 56px;position:relative;overflow:hidden;
}
@media(min-width:1284px){.cta{margin-left:auto;margin-right:auto}}
.cta::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:radial-gradient(ellipse at 20% 20%,#000,transparent 72%);
  -webkit-mask-image:radial-gradient(ellipse at 20% 20%,#000,transparent 72%);
}
.cta > *{position:relative;z-index:1}
.cta .eyebrow{color:#8FB0FF}
.cta .eyebrow::before{background:#8FB0FF}
.cta h2{color:#fff;font-family:var(--serif);font-size:clamp(28px,4vw,44px);
  margin:16px 0 14px;font-weight:700;letter-spacing:-.01em}
.cta p{color:#B9C7E6;max-width:540px;font-size:16px}
.cta .btn-p{background:#fff;color:#0D1526;box-shadow:0 16px 34px -16px rgba(0,0,0,.7)}
.cta .btn-p:hover{background:#E9EEF8}
.cta .btn-s{background:rgba(255,255,255,.06);color:#fff;border-color:rgba(255,255,255,.25)}
.cta .btn-s:hover{background:rgba(255,255,255,.13);color:#fff}

/* 页脚 — 仿 codex.goodpoint.top 双栏结构 */
.footer{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,var(--paper) 0%,var(--paper-2) 100%);
  padding:42px 0 36px;position:relative;z-index:1;
}
.foot-in{max-width:1220px;margin:0 auto;padding:0 32px}
.foot-nav{
  display:flex;flex-wrap:wrap;gap:6px 22px;
  margin-bottom:26px;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.06em;
}
.foot-nav a{
  color:var(--ink-2);text-decoration:none;
  padding:4px 0;
  transition:.16s;
}
.foot-nav a:hover{color:var(--blue)}
.foot-copy{
  display:flex;justify-content:space-between;align-items:flex-start;
  gap:28px;flex-wrap:wrap;
  padding-top:24px;border-top:1px solid var(--line-soft);
}
.foot-left{display:flex;flex-direction:column;gap:6px;flex-shrink:0}
.foot-line1{
  display:inline-flex;align-items:center;gap:10px;
  font-size:15px;color:var(--ink);font-weight:600;
}
.foot-line1 b{font-weight:700}
.foot-ver{
  font-family:var(--mono);font-size:12px;font-weight:500;
  color:var(--blue);letter-spacing:.04em;
}
.foot-gen{
  font-family:var(--mono);font-size:11.5px;color:var(--ink-4);
  letter-spacing:.06em;
}
.foot-right{
  max-width:560px;font-size:13px;color:var(--ink-2);
  line-height:1.7;
}
.foot-right a{color:var(--blue);text-decoration:none;border-bottom:1px solid rgba(30,79,216,.3)}
.foot-right a:hover{border-bottom-color:var(--blue)}
@media(max-width:720px){
  .foot-copy{flex-direction:column;gap:18px}
  .foot-right{max-width:100%}
  .foot-nav{gap:6px 16px}
}

/* ============================================================
   章节页布局
   ============================================================ */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);z-index:150;
  background:rgba(255,255,255,.86);backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-right:1px solid var(--line);display:flex;flex-direction:column;
}
.sb-head{padding:18px 22px 16px;border-bottom:1px solid var(--line-soft);flex-shrink:0}
.sb-search{
  display:flex;align-items:center;gap:8px;width:100%;height:36px;padding:0 11px;
  margin-top:14px;border:1px solid var(--line);border-radius:9px;background:var(--paper);
  color:var(--ink-3);font-size:13px;cursor:pointer;transition:.2s;
}
.sb-search:hover{border-color:var(--blue-l);color:var(--blue-d);background:var(--card)}
.sb-search kbd{margin-left:auto;font-family:var(--mono);font-size:10px;padding:2px 5px;
  border-radius:4px;background:var(--paper-2);border:1px solid var(--line)}

.sb-scroll{flex:1;overflow-y:auto;padding:14px 0 40px}
.sb-scroll::-webkit-scrollbar{width:8px}
.sb-scroll::-webkit-scrollbar-thumb{background:var(--line);border-radius:4px;
  border:2px solid transparent;background-clip:padding-box}
.sb-scroll::-webkit-scrollbar-thumb:hover{background:var(--ink-4);background-clip:padding-box}

.sb-group{margin-bottom:6px}
.sb-glabel{
  display:flex;align-items:center;gap:8px;padding:9px 22px 7px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;
  color:var(--ink-4);text-transform:uppercase;font-weight:600;
}
.sb-glabel .gn{color:var(--blue);opacity:.75}
.sb-group ul{list-style:none}
.sb-group a{
  display:flex;gap:9px;padding:6.5px 22px 6.5px 22px;font-size:13.5px;
  color:var(--ink-2);border-left:2px solid transparent;transition:.16s;line-height:1.5;
}
.sb-group a .ix{font-family:var(--mono);font-size:11px;color:var(--ink-4);flex-shrink:0;
  padding-top:1px}
.sb-group a:hover{color:var(--blue-d);background:var(--blue-wash)}
.sb-group a.active{color:var(--blue-d);background:var(--blue-wash);
  border-left-color:var(--blue);font-weight:650}
.sb-group a.active .ix{color:var(--blue)}

.sb-foot{padding:12px 22px;border-top:1px solid var(--line-soft);flex-shrink:0;
  font-family:var(--mono);font-size:10.5px;color:var(--ink-4);letter-spacing:.1em;
  display:flex;justify-content:space-between;align-items:center}
.sb-foot a{color:var(--ink-3)}
.sb-foot a:hover{color:var(--blue)}

.docmain{margin-left:var(--sidebar-w);min-height:100vh;position:relative;z-index:1}
.docwrap{display:grid;grid-template-columns:minmax(0,1fr) var(--toc-w);
  gap:52px;max-width:1180px;margin:0 auto;padding:0 44px}

.doc-hero{
  border-bottom:1px solid var(--line);background:linear-gradient(180deg,rgba(255,255,255,.7),transparent);
  padding:52px 0 30px;margin-bottom:8px;
}
.crumb{font-family:var(--mono);font-size:11.5px;letter-spacing:.14em;color:var(--ink-3);
  text-transform:uppercase;display:flex;gap:9px;align-items:center;flex-wrap:wrap}
.crumb a{color:var(--ink-3)}
.crumb a:hover{color:var(--blue)}
.crumb .sep{color:var(--ink-4);opacity:.6}
.doc-hero h1{
  font-family:var(--serif);font-size:clamp(30px,4.4vw,46px);font-weight:700;
  line-height:1.2;letter-spacing:-.015em;margin:14px 0 12px;
}
.doc-hero .lead{max-width:660px;color:var(--ink-2);font-size:16px}
.doc-hero .badges{display:flex;gap:8px;margin-top:16px;flex-wrap:wrap;align-items:center}

article.doc{padding:34px 0 40px;max-width:var(--content-max);min-width:0}

/* 正文排版 */
.doc h2{
  font-family:var(--serif);font-size:27px;font-weight:700;line-height:1.4;
  margin:56px 0 18px;padding-top:14px;border-top:1px solid var(--line);
  letter-spacing:-.01em;position:relative;
}
.doc h2::before{
  content:"";position:absolute;top:-1px;left:0;width:52px;height:3px;background:var(--blue);
}
.doc h2:first-child{margin-top:6px}
.doc h3{font-size:19.5px;font-weight:750;margin:38px 0 14px;line-height:1.5;
  letter-spacing:-.005em}
.doc h3::before{content:"›";color:var(--blue);margin-right:9px;font-weight:400}
.doc h4{font-size:16.5px;font-weight:700;margin:28px 0 11px;color:var(--ink)}
.doc h5,.doc h6{font-size:15px;font-weight:700;margin:22px 0 9px}

.doc p{margin:0 0 17px;color:var(--ink-2);font-size:15.6px;line-height:1.88}
.doc strong{color:var(--ink);font-weight:700}
.doc em{color:var(--ink-2)}
.doc a{color:var(--blue);text-decoration:underline;text-decoration-color:rgba(30,79,216,.3);
  text-underline-offset:3px;transition:.18s}
.doc a:hover{color:var(--blue-d);text-decoration-color:var(--blue)}

.doc ul,.doc ol{margin:0 0 18px;padding-left:22px;color:var(--ink-2)}
.doc li{margin:7px 0;font-size:15.6px;line-height:1.85}
.doc li::marker{color:var(--blue-l)}
.doc ul ul,.doc ol ol,.doc ul ol,.doc ol ul{margin:6px 0 6px}

.doc blockquote{
  margin:22px 0;padding:14px 20px;border-left:3px solid var(--blue-l);
  background:var(--blue-wash);border-radius:0 var(--r) var(--r) 0;color:var(--ink-2);
}
.doc blockquote p:last-child{margin-bottom:0}

.doc hr{border:none;border-top:1px dashed var(--line);margin:38px 0}

.doc code{
  font-family:var(--mono);font-size:.87em;padding:2px 6px;border-radius:5px;
  background:var(--paper-2);color:var(--blue-d);border:1px solid var(--line-soft);
}
.doc pre{
  margin:22px 0;padding:18px 20px;border-radius:var(--r);overflow-x:auto;
  background:#0D1526;border:1px solid #1C2A45;
}
.doc pre code{background:none;border:none;padding:0;color:#C7D5F0;font-size:13.2px;
  line-height:1.75;display:block}

/* 表格 */
.table-wrap{margin:24px 0;overflow-x:auto;border:1px solid var(--line);
  border-radius:var(--r);background:var(--card);box-shadow:var(--shadow-s)}
.doc table{border-collapse:collapse;width:100%;font-size:14.5px;min-width:480px}
.doc thead th{
  background:var(--paper-2);text-align:left;padding:12px 16px;font-weight:700;
  color:var(--ink);border-bottom:1px solid var(--line);white-space:nowrap;
  font-size:13.5px;letter-spacing:.01em;
}
.doc tbody td{padding:12px 16px;border-bottom:1px solid var(--line-soft);
  color:var(--ink-2);vertical-align:top;line-height:1.7}
.doc tbody tr:last-child td{border-bottom:none}
.doc tbody tr:hover{background:var(--blue-wash)}

/* 图片 */
.doc figure{margin:28px 0}
.doc figure img{
  display:block;width:100%;height:auto;border-radius:var(--r);
  border:1px solid var(--line);background:var(--card);box-shadow:var(--shadow-m);
  cursor:zoom-in;transition:.25s;
}
.doc figure img:hover{transform:translateY(-2px);box-shadow:var(--shadow-l)}
.doc figcaption{
  margin-top:10px;font-family:var(--mono);font-size:11.5px;color:var(--ink-4);
  letter-spacing:.06em;text-align:center;
}
.img-row{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:28px 0}
.img-row figure{margin:0}

/* 提示块 */
.callout{
  margin:24px 0;padding:16px 20px;border-radius:var(--r);position:relative;
  background:linear-gradient(120deg,var(--blue-wash),rgba(240,236,253,.7));
  border:1px solid #C9D8FA;color:var(--ink);font-size:15.5px;line-height:1.8;
}
.callout::before{
  content:"※";position:absolute;left:-1px;top:-1px;width:26px;height:26px;
  display:grid;place-items:center;background:var(--blue);color:#fff;
  border-radius:var(--r) 0 var(--r) 0;font-size:12px;
}
.callout{padding-left:38px}
.callout p:last-child{margin-bottom:0}
.callout strong{color:var(--blue-d)}

/* 上下篇 */
.pager{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:26px 0 60px;
  max-width:var(--content-max)}
.pager a{
  border:1px solid var(--line);border-radius:12px;padding:16px 20px;background:var(--card);
  color:var(--ink);transition:.22s;display:flex;flex-direction:column;gap:5px;
}
.pager a:hover{border-color:var(--blue-l);transform:translateY(-3px);box-shadow:var(--shadow-s)}
.pager .dir{font-family:var(--mono);font-size:10.5px;letter-spacing:.2em;color:var(--ink-4);
  text-transform:uppercase}
.pager b{font-size:15px;font-weight:700}
.pager .next{text-align:right;align-items:flex-end}
.pager .ph{border:1px dashed var(--line);background:transparent;pointer-events:none;opacity:.45}

/* 右侧 TOC */
.toc{position:sticky;top:0;align-self:start;padding:74px 0 40px;max-height:100vh;
  overflow-y:auto}
.toc::-webkit-scrollbar{width:0}
.toc .tl{font-family:var(--mono);font-size:10.5px;letter-spacing:.2em;color:var(--ink-4);
  text-transform:uppercase;padding-bottom:11px;margin-bottom:9px;
  border-bottom:1px solid var(--line)}
.toc ul{list-style:none}
.toc a{
  display:block;padding:5px 0 5px 12px;font-size:12.8px;color:var(--ink-3);
  border-left:2px solid var(--line-soft);line-height:1.55;transition:.16s;
}
.toc a:hover{color:var(--blue);border-left-color:var(--blue-l)}
.toc a.active{color:var(--blue-d);border-left-color:var(--blue);font-weight:650}
.toc .lv3{padding-left:24px;font-size:12.2px}

/* 进度条 */
.progress{position:fixed;top:0;left:var(--sidebar-w);right:0;height:2px;z-index:180;
  background:transparent}
.progress i{display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--blue),var(--violet))}

/* ============================================================
   搜索浮层
   ============================================================ */
.sc-mask{
  position:fixed;inset:0;z-index:500;background:rgba(13,21,38,.35);
  backdrop-filter:blur(4px);display:none;padding:12vh 20px 20px;
}
.sc-mask.open{display:block}
.sc-box{
  max-width:660px;margin:0 auto;background:var(--card);border:1px solid var(--line);
  border-radius:14px;box-shadow:var(--shadow-l);overflow:hidden;
}
.sc-input{display:flex;align-items:center;gap:12px;padding:16px 20px;
  border-bottom:1px solid var(--line-soft)}
.sc-input svg{flex-shrink:0;color:var(--ink-4)}
.sc-input input{
  flex:1;border:none;outline:none;font-size:16px;font-family:var(--sans);
  color:var(--ink);background:transparent;
}
.sc-input input::placeholder{color:var(--ink-4)}
.sc-input .esc{font-family:var(--mono);font-size:10.5px;padding:3px 7px;border-radius:5px;
  background:var(--paper-2);border:1px solid var(--line);color:var(--ink-3);cursor:pointer}
.sc-results{max-height:52vh;overflow-y:auto;padding:8px}
.sc-results a{
  display:block;padding:11px 14px;border-radius:9px;color:var(--ink);transition:.14s;
}
.sc-results a:hover,.sc-results a.sel{background:var(--blue-wash)}
.sc-results .g{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;
  color:var(--blue);text-transform:uppercase}
.sc-results b{display:block;font-size:15px;font-weight:700;margin:3px 0}
.sc-results p{font-size:13px;color:var(--ink-3);line-height:1.6;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.sc-results mark{background:rgba(30,79,216,.16);color:var(--blue-d);padding:0 2px;
  border-radius:3px}
.sc-empty{padding:40px 20px;text-align:center;color:var(--ink-4);font-size:14px}
.sc-foot{padding:10px 18px;border-top:1px solid var(--line-soft);background:var(--paper);
  font-family:var(--mono);font-size:10.5px;color:var(--ink-4);letter-spacing:.08em;
  display:flex;gap:16px;flex-wrap:wrap}

/* 图片灯箱 */
.lightbox{
  position:fixed;inset:0;z-index:600;background:rgba(13,21,38,.88);
  display:none;place-items:center;padding:40px;cursor:zoom-out;
}
.lightbox.open{display:grid}
.lightbox img{max-width:100%;max-height:100%;border-radius:10px;
  box-shadow:0 40px 90px -30px rgba(0,0,0,.8)}

/* 移动端菜单按钮 */
.mob-bar{display:none}

/* 阅读路线页 */
.route{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:40px}
.route-card{background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:26px 24px;position:relative;transition:.24s}
.route-card:hover{border-color:var(--blue-l);box-shadow:var(--shadow-m);transform:translateY(-3px)}
.route-card .rk{font-family:var(--mono);font-size:10.5px;letter-spacing:.2em;color:var(--blue);
  text-transform:uppercase;font-weight:600}
.route-card h3{font-size:20px;font-weight:750;margin:10px 0 8px}
.route-card > p{font-size:14px;color:var(--ink-2);margin-bottom:16px}
.route-list{list-style:none;counter-reset:r}
.route-list li{counter-increment:r;position:relative;padding-left:30px;margin:9px 0;
  font-size:14px;line-height:1.65}
.route-list li::before{
  content:counter(r,decimal-leading-zero);position:absolute;left:0;top:1px;
  font-family:var(--mono);font-size:10.5px;color:#fff;background:var(--blue);
  width:20px;height:20px;border-radius:6px;display:grid;place-items:center;font-weight:600;
}
.route-list a{color:var(--ink);font-weight:600}
.route-list a:hover{color:var(--blue)}
.route-list span{display:block;color:var(--ink-3);font-size:12.5px}

/* 全部文档索引 */
.idx-group{margin-top:44px}
.idx-head{display:flex;align-items:baseline;gap:14px;padding-bottom:12px;
  border-bottom:1px solid var(--line);margin-bottom:16px}
.idx-head h3{font-family:var(--serif);font-size:22px;font-weight:700}
.idx-head .c{font-family:var(--mono);font-size:11px;color:var(--ink-4);letter-spacing:.14em}
.idx-list{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.idx-list a{
  display:flex;gap:10px;align-items:baseline;padding:11px 14px;border-radius:9px;
  border:1px solid transparent;color:var(--ink);font-size:14.2px;transition:.18s;
}
.idx-list a:hover{background:var(--card);border-color:var(--line);color:var(--blue-d);
  transform:translateX(3px)}
.idx-list .ix{font-family:var(--mono);font-size:11px;color:var(--ink-4)}

/* ============================================================
   响应式
   ============================================================ */
@media(max-width:1180px){
  .docwrap{grid-template-columns:minmax(0,1fr);padding:0 36px}
  .toc{display:none}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-grid .blueprint{max-width:460px}
  .hero-logo{height:54px;margin-top:18px}
  .parts,.tasks,.route,.idx-list{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:980px){
  .nav-links{display:none}
  .flow{grid-template-columns:repeat(2,1fr)}
  .flow-step:nth-child(3){border-left:none}
  .flow-step:nth-child(-n+2){border-bottom:1px solid var(--line-soft)}
  .flow-step:nth-child(2)::after{display:none}
  .stats-in{grid-template-columns:repeat(2,1fr)}
  .stat{padding:22px 18px;border-left:none}
  .stat:nth-child(even){border-left:1px solid var(--line-soft)}

  .sidebar{transform:translateX(-100%);transition:transform .28s cubic-bezier(.2,.7,.3,1);
    box-shadow:var(--shadow-l);width:290px}
  .sidebar.open{transform:none}
  .docmain{margin-left:0}
  .progress{left:0}
  .mob-bar{
    display:flex;position:sticky;top:0;z-index:140;align-items:center;gap:12px;
    height:56px;padding:0 18px;background:rgba(242,245,250,.94);
    backdrop-filter:blur(14px);border-bottom:1px solid var(--line);
  }
  .mob-bar button{
    width:36px;height:36px;border:1px solid var(--line);border-radius:9px;background:var(--card);
    display:grid;place-items:center;cursor:pointer;color:var(--ink-2);flex-shrink:0;
  }
  .mob-bar .t{font-size:14.5px;font-weight:700;overflow:hidden;text-overflow:ellipsis;
    white-space:nowrap}
  .sb-backdrop{position:fixed;inset:0;background:rgba(13,21,38,.4);z-index:145;display:none}
  .sb-backdrop.open{display:block}
  .doc-hero{padding:32px 0 24px}
}
@media(max-width:720px){
  .wrap,.topnav-in,.stats-in,.footer-in{padding-left:20px;padding-right:20px}
  .docwrap{padding:0 20px}
  .hero{padding:104px 0 48px}
  .parts,.tasks,.route,.idx-list,.pager,.img-row{grid-template-columns:1fr}
  .section{padding:60px 0}
  .cta{margin:0 20px 60px;padding:44px 26px;border-radius:16px}
  .stats-in{grid-template-columns:1fr 1fr}
  .flow{grid-template-columns:1fr}
  .flow-step{border-left:none;border-top:1px solid var(--line-soft)}
  .flow-step:first-child{border-top:none}
  .flow-step::after{display:none}
  .nav-search span{display:none}
  .doc table{font-size:13.5px}
}

/* 动画 */
@keyframes rise{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.rise{animation:rise .7s cubic-bezier(.2,.7,.3,1) both}
.d1{animation-delay:.06s}.d2{animation-delay:.12s}.d3{animation-delay:.18s}
.d4{animation-delay:.26s}.d5{animation-delay:.34s}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* ---------- 双蓝皮书切换 ---------- */
.book-pill{
  display:inline-flex;align-items:center;gap:5px;
  font-size:12.5px;font-weight:600;color:var(--blue-d);
  padding:6px 11px;border-radius:999px;
  border:1px solid color-mix(in srgb,var(--blue) 38%,transparent);
  background:color-mix(in srgb,var(--blue) 8%,transparent);
  text-decoration:none;white-space:nowrap;transition:.18s;
}
.book-pill:hover{background:color-mix(in srgb,var(--blue) 16%,transparent);transform:translateY(-1px)}
@media(max-width:980px){.book-pill{display:none}}

/* ---------- 视频 ---------- */
.doc video{
  max-width:100%;width:100%;display:block;margin:20px 0;
  border-radius:14px;background:#0b1020;
  box-shadow:0 12px 34px -18px rgba(20,40,90,.5);
  border:1px solid var(--line);
}

/* ---------- Mermaid 图 ---------- */
.mermaid{
  margin:22px 0;padding:16px;background:#fff;
  border:1px solid var(--line);border-radius:14px;
  overflow-x:auto;
}
.mermaid svg{max-width:100%;height:auto}
.mermaid-error{
  color:#b4232a;font-family:var(--mono);font-size:13px;
  background:#fff3f3;padding:10px 12px;border-radius:8px;
}

/* ---------- 首页「典型场景」板块（案例先行） ---------- */
.scenes{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:16px;
  margin-top:26px;
}
.scene{
  display:flex;flex-direction:column;gap:6px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:14px;
  padding:20px 20px 18px;
  text-decoration:none;color:var(--ink);
  transition:.2s ease;position:relative;overflow:hidden;
}
.scene::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:linear-gradient(var(--blue-l),var(--blue));
  transform:scaleY(0);transform-origin:top;transition:.25s ease;
}
.scene:hover{transform:translateY(-3px);box-shadow:0 14px 34px -18px rgba(30,79,216,.5);border-color:var(--blue-l)}
.scene:hover::before{transform:scaleY(1)}
.scene .st{
  font-family:var(--mono);font-size:11px;letter-spacing:.14em;
  color:var(--blue);font-weight:600;
}
.scene b{font-size:17px;font-weight:700;letter-spacing:-.01em}
.scene .sd{font-size:13px;color:var(--ink-3);line-height:1.55}
.scene .go{
  margin-top:8px;font-size:12.5px;color:var(--blue-d);font-weight:600;
}
@media(max-width:880px){.scenes{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.scenes{grid-template-columns:1fr}}