/* =========================================================
   NetCanvas · 校园计算机网络拓扑设计平台
   纯静态 / 零依赖 / 可直接拖拽上传 Cloudflare Pages
   ========================================================= */

:root{
  --bg:#050818;
  --bg2:#0a1233;
  --panel:rgba(11,24,58,.72);
  --panel-solid:#0b1734;
  --cyan:#28e3ff;
  --blue:#2f7bff;
  --purple:#a45cff;
  --pink:#ff62d0;
  --green:#36e08a;
  --text:#eaf6ff;
  --muted:#8ea9cc;
  --line:rgba(88,180,255,.26);
  --line-strong:rgba(60,220,255,.55);
  --glow:0 0 24px rgba(40,227,255,.28);
  --font:"Segoe UI","PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);color:var(--text);
  background:var(--bg);-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font-family:inherit;font-size:inherit;outline:none}
button{cursor:pointer}
::selection{background:rgba(40,227,255,.3)}

/* ---------- 背景氛围 ---------- */
.bg-layer{position:fixed;inset:0;pointer-events:none;z-index:0}
.bg-layer .grid{
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(70,140,255,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(70,140,255,.07) 1px,transparent 1px);
  background-size:52px 52px;
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.9),rgba(0,0,0,.25) 70%,transparent);
}
.bg-layer .halo{
  position:absolute;border-radius:50%;filter:blur(90px);opacity:.55;
}
.bg-layer .h1{width:760px;height:760px;left:-220px;top:-260px;background:radial-gradient(circle,#1d3fa8,transparent 68%)}
.bg-layer .h2{width:700px;height:700px;right:-200px;top:-180px;background:radial-gradient(circle,#7b2fd6,transparent 68%)}
.bg-layer .h3{width:900px;height:520px;left:50%;transform:translateX(-50%);bottom:-320px;background:radial-gradient(circle,#0b6ea8,transparent 70%)}
.bg-layer .scan{
  position:absolute;left:0;right:0;top:0;height:100%;
  background:repeating-linear-gradient(to bottom,transparent 0 3px,rgba(0,0,0,.10) 3px 4px);
  opacity:.35;
}

/* ---------- 通用 ---------- */
.wrap{position:relative;z-index:1;max-width:1180px;margin:0 auto;padding:0 24px}
.glass{
  background:linear-gradient(145deg,rgba(16,34,78,.78),rgba(8,16,42,.72));
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(160,220,255,.12),0 12px 40px rgba(0,0,0,.35);
  backdrop-filter:blur(10px);
}
.neon-text{
  background:linear-gradient(100deg,#4af0ff 0%,#3a8bff 38%,#a45cff 72%,#ff6fd8 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 0 18px rgba(60,180,255,.45));
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:10px;border:1px solid var(--line-strong);
  color:var(--text);background:rgba(20,44,92,.55);font-weight:600;
  transition:.22s ease;white-space:nowrap;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 8px 26px rgba(40,180,255,.28)}
.btn-primary{
  border:none;color:#031329;font-weight:800;
  background:linear-gradient(95deg,#39e9ff,#4d8bff 55%,#b76bff);
  box-shadow:0 6px 28px rgba(50,150,255,.42);
}
.btn-primary:hover{box-shadow:0 10px 36px rgba(80,180,255,.6)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--muted)}
.btn-sm{padding:7px 13px;font-size:13px;border-radius:8px}
.ico{width:18px;height:18px;flex:none;display:inline-block;vertical-align:middle}

/* ---------- 顶部导航 ---------- */
.topbar{
  position:relative;z-index:5;display:flex;align-items:center;justify-content:space-between;
  max-width:1180px;margin:0 auto;padding:20px 24px;
}
.brand{font-size:22px;font-weight:800;letter-spacing:.5px}
.brand .dot{color:var(--cyan)}
.nav{display:flex;align-items:center;gap:26px;font-size:14px;color:var(--muted)}
.nav a:hover{color:var(--cyan)}

/* ---------- Hero ---------- */
.hero{position:relative;text-align:center;padding:18px 0 10px}
.sakura{position:absolute;top:-40px;left:0;width:230px;height:180px;pointer-events:none;opacity:.75}
.sakura.r{left:auto;right:0;transform:scaleX(-1)}
.hero h1{
  margin:0;font-size:clamp(64px,11.5vw,142px);line-height:1;letter-spacing:-3px;font-weight:900;
}
.subtitle{
  margin:8px 0 0;font-size:clamp(20px,2.6vw,34px);font-weight:800;letter-spacing:5px;
  text-shadow:0 0 22px rgba(60,180,255,.55);
}
.subtitle::before,.subtitle::after{content:"——";color:rgba(120,200,255,.6);margin:0 14px;font-weight:400;letter-spacing:0}
.slogan{
  display:inline-flex;align-items:center;gap:10px;margin:26px 0 0;padding:11px 30px;
  font-size:clamp(15px,1.8vw,23px);font-weight:800;letter-spacing:1px;
  color:#dff6ff;background:linear-gradient(90deg,rgba(20,50,110,.2),rgba(90,40,160,.5),rgba(20,50,110,.2));
  border-top:1px solid rgba(80,220,255,.5);border-bottom:1px solid rgba(80,220,255,.5);
  clip-path:polygon(18px 0,100% 0,calc(100% - 18px) 100%,0 100%);
  box-shadow:0 0 30px rgba(70,150,255,.25);
}
.slogan .arrow{color:var(--cyan);font-size:1.2em}
.cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin:26px 0 4px}
.free-note{margin:10px 0 0;font-size:13px;color:var(--muted)}

/* ---------- 舞台 / 笔记本 ---------- */
.stage{position:relative;max-width:1080px;margin:34px auto 0;padding:20px 0 10px}
.laptop{position:relative;width:min(770px,88%);margin:0 auto;perspective:1400px}
.laptop .screen{
  position:relative;border:9px solid #1c2c56;border-radius:14px 14px 4px 4px;
  background:#060c1f;overflow:hidden;aspect-ratio:16/10;
  box-shadow:0 0 0 1px rgba(120,210,255,.35),0 0 70px rgba(35,180,255,.35),inset 0 0 50px rgba(0,0,0,.7);
  transform:rotateX(3deg);
}
.laptop .screen::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(115deg,rgba(255,255,255,.07),transparent 35%,transparent 70%,rgba(120,90,255,.10));
}
.laptop .base{
  height:26px;margin:0 -5%;border-radius:0 0 46px 46px;
  background:linear-gradient(180deg,#264187,#0a1230 70%);
  box-shadow:0 18px 40px rgba(0,0,0,.6),0 0 26px rgba(40,160,255,.25);
  transform:rotateX(58deg);transform-origin:top center;
}
.laptop .base::after{
  content:"";display:block;width:120px;height:5px;margin:6px auto 0;border-radius:0 0 8px 8px;
  background:rgba(120,200,255,.25);
}

/* 屏幕里的编辑器界面 */
.app{position:absolute;inset:0;display:flex;flex-direction:column;font-size:9px;color:#cfe6ff}
.app-chrome{
  height:30px;flex:none;display:flex;align-items:center;gap:10px;padding:0 10px;
  background:rgba(11,22,50,.95);border-bottom:1px solid rgba(80,160,255,.25);
}
.app-chrome .logo{font-weight:800;font-size:11px;color:#7fe9ff}
.app-chrome .crumb{color:#7f9dc4}
.app-chrome .spacer{flex:1}
.app-chrome .mini-pill{padding:3px 8px;border-radius:5px;background:rgba(45,100,190,.4);border:1px solid rgba(90,190,255,.35);font-size:8px}
.app-chrome .mini-pill.blue{background:linear-gradient(90deg,#1f7bff,#3aa6ff);color:#fff;border:none}
.app-body{flex:1;display:flex;min-height:0}
.app-side{width:78px;flex:none;background:rgba(9,18,44,.9);border-right:1px solid rgba(80,160,255,.2);padding:8px 6px}
.app-side .tabs{display:flex;gap:4px;margin-bottom:8px}
.app-side .tab{flex:1;text-align:center;padding:3px 0;border-radius:4px;background:rgba(40,100,190,.35);color:#8fc8ff}
.app-side .tab.on{background:#1f6dff;color:#fff}
.app-side .dev{display:flex;align-items:center;gap:6px;padding:5px 4px;border-radius:5px;color:#9fc4ea}
.app-side .dev:hover{background:rgba(60,140,255,.18)}
.app-side .dev i{width:12px;height:12px;border-radius:3px;background:linear-gradient(135deg,#38e6ff,#3a7bff);flex:none}
.app-canvas{flex:1;position:relative;background:radial-gradient(circle at 50% 40%,rgba(20,60,120,.35),transparent 70%)}
.app-canvas svg{width:100%;height:100%;display:block}
.app-props{width:120px;flex:none;background:rgba(9,18,44,.9);border-left:1px solid rgba(80,160,255,.2);padding:8px 7px;overflow:hidden}
.app-props .ph{font-weight:700;color:#8fe6ff;padding-bottom:5px;border-bottom:1px solid rgba(80,160,255,.25);margin-bottom:6px}
.app-props .row{display:flex;justify-content:space-between;color:#8ea9cc;margin:5px 0;font-size:8px}
.app-props .row b{color:#d8ecff;font-weight:600}
.app-props .vlan{display:flex;align-items:center;gap:5px;margin:4px 0;color:#a9c6e6}
.app-props .swatch{width:7px;height:7px;border-radius:2px}
.app-foot{height:20px;flex:none;display:flex;align-items:center;justify-content:space-between;padding:0 10px;background:rgba(9,18,44,.95);border-top:1px solid rgba(80,160,255,.2);color:#7f9dc4;font-size:8px}

/* 浮动信息卡 */
.float-card{
  position:absolute;z-index:3;padding:12px 14px;border-radius:14px;
  background:linear-gradient(145deg,rgba(18,42,92,.72),rgba(10,20,50,.6));
  border:1px solid rgba(90,210,255,.35);
  box-shadow:0 0 24px rgba(30,140,255,.22),inset 0 1px 0 rgba(180,230,255,.15);
  backdrop-filter:blur(8px);font-size:13px;text-align:left;
  animation:float 6s ease-in-out infinite;
}
.float-card .fc-title{font-size:12px;color:#9fd8ff;margin-bottom:8px;letter-spacing:1px}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.fc-devices{left:1%;top:8%;width:132px}
.fc-devices .net{display:block;width:100%;height:62px}
.fc-ip{left:-1%;top:42%;line-height:1.75;font-size:15px;font-family:Consolas,Monaco,monospace;color:#cdf0ff}
.fc-ip .fc-title{font-family:var(--font)}
.fc-vlan{right:1%;top:5%;width:150px}
.fc-vlan .v{display:flex;align-items:center;gap:8px;margin:6px 0;color:#dcefff}
.fc-vlan .v i{width:10px;height:10px;border-radius:2px;box-shadow:0 0 8px currentColor}
.fc-wifi{right:5%;top:36%;width:110px;height:88px;display:grid;place-items:center}
.fc-wifi svg{width:52px;height:52px;color:#66e6ff;filter:drop-shadow(0 0 12px rgba(60,220,255,.7))}
.fc-cloud{right:0%;top:60%;width:120px;height:90px;display:grid;place-items:center}
.fc-cloud svg{width:64px;height:56px;color:#66e6ff;filter:drop-shadow(0 0 14px rgba(60,220,255,.7))}

/* ---------- 功能区 ---------- */
.section{position:relative;z-index:1;padding:64px 0 0}
.section-head{text-align:center;margin-bottom:34px}
.section-head h2{
  display:inline-block;margin:0;padding:10px 44px;font-size:30px;letter-spacing:6px;font-weight:800;
  background:linear-gradient(90deg,rgba(20,50,110,.1),rgba(60,40,150,.55),rgba(20,50,110,.1));
  border-top:1px solid rgba(90,210,255,.5);border-bottom:1px solid rgba(90,210,255,.5);
  clip-path:polygon(16px 0,100% 0,calc(100% - 16px) 100%,0 100%);
  text-shadow:0 0 18px rgba(70,190,255,.6);
}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;max-width:1000px;margin:0 auto}
.feature{
  display:flex;align-items:center;gap:14px;padding:18px 20px;border-radius:16px;
  font-size:19px;font-weight:700;letter-spacing:1px;transition:.25s ease;
  clip-path:polygon(14px 0,100% 0,calc(100% - 14px) 100%,0 100%);
}
.feature:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 14px 34px rgba(30,140,255,.3)}
.feature svg{width:28px;height:28px;flex:none;color:var(--cyan);filter:drop-shadow(0 0 8px rgba(40,220,255,.6))}
.feature:nth-child(3n) svg,.feature:nth-child(5) svg{color:#c58bff;filter:drop-shadow(0 0 8px rgba(180,110,255,.6))}

/* ---------- 核心亮点 ---------- */
.highlight-box{max-width:1000px;margin:0 auto;padding:8px;border-radius:20px;position:relative;overflow:hidden}
.highlight-box::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(120deg,rgba(40,140,255,.10),transparent 40%,rgba(160,80,255,.10));
}
.hl-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.hl{position:relative;text-align:center;padding:30px 18px}
.hl+.hl{border-left:1px solid rgba(90,170,255,.22)}
.hl svg{width:48px;height:48px;color:#7fe6ff;filter:drop-shadow(0 0 12px rgba(60,200,255,.5));margin-bottom:14px}
.hl p{margin:0;font-size:17px;font-weight:700;line-height:1.55;letter-spacing:1px}

/* ---------- 页脚 ---------- */
.footer{position:relative;z-index:1;text-align:center;padding:70px 20px 46px;color:#9fc6ea;font-size:15px;letter-spacing:2px}
.footer .slashes{color:var(--cyan);margin:0 12px;letter-spacing:-2px}
.footer .meta{margin-top:14px;font-size:12px;color:#5f7ca3;letter-spacing:1px}

/* =========================================================
   编辑器页面
   ========================================================= */
body.editor{height:100vh;display:flex;flex-direction:column;overflow:hidden;background:#060c1f}
.ed-topbar{
  height:56px;flex:none;display:flex;align-items:center;gap:12px;padding:0 16px;
  background:rgba(9,18,44,.96);border-bottom:1px solid var(--line);z-index:20;
}
.ed-topbar .crumb{color:var(--muted);font-size:13px}
.ed-topbar .spacer{flex:1}
.save-state{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--green)}
.save-state i{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 8px var(--green)}
.ed-select{
  background:rgba(20,44,92,.7);border:1px solid var(--line);color:var(--text);
  border-radius:8px;padding:7px 10px;font-size:13px;
}
.dropdown{position:relative}
.dropdown-menu{
  position:absolute;right:0;top:calc(100% + 6px);min-width:190px;padding:6px;
  border-radius:10px;background:#0d1c40;border:1px solid var(--line-strong);
  box-shadow:0 16px 40px rgba(0,0,0,.5);display:none;z-index:40;
}
.dropdown.open .dropdown-menu{display:block}
.dropdown-menu button{
  display:block;width:100%;text-align:left;padding:9px 12px;border:0;border-radius:6px;
  background:transparent;color:var(--text);font-size:13px;
}
.dropdown-menu button:hover{background:rgba(60,150,255,.22)}
.dropdown-menu .sep{height:1px;background:var(--line);margin:5px 2px}

.ed-main{flex:1;display:flex;min-height:0;position:relative}
.palette{
  width:186px;flex:none;background:rgba(9,18,44,.92);border-right:1px solid var(--line);
  padding:12px 10px;overflow-y:auto;
}
.pal-tabs{display:flex;gap:5px;margin-bottom:12px}
.pal-tabs button{
  flex:1;padding:6px 0;border-radius:6px;border:1px solid var(--line);
  background:rgba(30,70,140,.35);color:var(--muted);font-size:12px;
}
.pal-tabs button.on{background:#1f6dff;border-color:#1f6dff;color:#fff}
.pal-title{font-size:11px;color:#6f8db4;letter-spacing:1px;margin:10px 2px 8px}
.pal-item{
  display:flex;align-items:center;gap:10px;padding:9px 10px;margin-bottom:7px;border-radius:9px;
  border:1px solid rgba(80,160,255,.18);background:rgba(16,34,76,.55);
  font-size:13px;cursor:grab;user-select:none;transition:.18s;
}
.pal-item:hover{border-color:var(--line-strong);background:rgba(30,70,140,.55);transform:translateX(2px)}
.pal-item:active{cursor:grabbing}
.pal-item svg{width:22px;height:22px;flex:none;color:#7fe0ff}
.pal-tip{font-size:11px;line-height:1.7;color:#6f8db4;margin-top:16px;padding:10px;border-top:1px dashed var(--line)}

.workspace{flex:1;display:flex;flex-direction:column;min-width:0;background:#070d20}
.ed-toolbar{
  height:44px;flex:none;display:flex;align-items:center;gap:6px;padding:0 12px;
  background:rgba(10,20,46,.9);border-bottom:1px solid var(--line);
}
.tool{
  display:flex;align-items:center;gap:6px;padding:6px 11px;border-radius:7px;
  border:1px solid transparent;background:transparent;color:var(--muted);font-size:12px;
}
.tool svg{width:15px;height:15px}
.tool:hover{background:rgba(50,120,220,.2);color:var(--text)}
.tool.on{background:rgba(35,110,255,.28);border-color:var(--line-strong);color:#bfefff}
.tool.danger:hover{background:rgba(255,70,110,.18);color:#ff9bb5}
.ed-toolbar .divider{width:1px;height:20px;background:var(--line);margin:0 6px}
.zoom-val{min-width:46px;text-align:center;font-size:12px;color:var(--muted)}

.canvas-wrap{
  flex:1;position:relative;overflow:auto;
  background-color:#070d20;
  background-image:
    linear-gradient(rgba(70,140,255,.075) 1px,transparent 1px),
    linear-gradient(90deg,rgba(70,140,255,.075) 1px,transparent 1px);
  background-size:26px 26px;
}
#canvas{position:relative;width:1400px;height:820px;transform-origin:0 0}
#links{position:absolute;inset:0;width:1400px;height:820px;overflow:visible;z-index:1}
#nodes{position:absolute;inset:0;z-index:2;pointer-events:none}
.nc-node{pointer-events:auto}
.link{fill:none;stroke:rgba(70,200,255,.75);stroke-width:2;filter:drop-shadow(0 0 5px rgba(40,190,255,.6))}
.link.selected{stroke:#ffd166;stroke-width:3;filter:drop-shadow(0 0 8px rgba(255,200,80,.8))}
.link-hit{fill:none;stroke:transparent;stroke-width:16;pointer-events:stroke;cursor:pointer}

.nc-node{
  position:absolute;width:118px;min-height:62px;border-radius:10px;padding:8px 9px;
  background:linear-gradient(150deg,rgba(18,40,86,.96),rgba(9,20,48,.96));
  border:1px solid rgba(90,190,255,.45);box-shadow:0 6px 20px rgba(0,0,0,.45),0 0 16px rgba(40,150,255,.16);
  cursor:move;user-select:none;transition:box-shadow .18s,border-color .18s;
}
.nc-node:hover{border-color:#6fe6ff;box-shadow:0 8px 26px rgba(0,0,0,.5),0 0 22px rgba(50,200,255,.35)}
.nc-node.selected{border-color:#ffd166;box-shadow:0 0 0 2px rgba(255,209,102,.35),0 0 26px rgba(255,190,80,.3)}
.nc-node.link-target{border-color:var(--green);box-shadow:0 0 0 2px rgba(54,224,138,.4)}
.nc-node .nhead{display:flex;align-items:center;gap:7px}
.nc-node .nhead svg{width:20px;height:20px;flex:none;color:#73dcff}
.nc-node .nname{font-size:12px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.nc-node .nip{font-size:10px;color:#8fb4dc;margin-top:5px;font-family:Consolas,Monaco,monospace;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.nc-node .nvlan{font-size:9px;margin-top:3px;color:#9fc6ea}
.nc-node .vbar{position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:2px;background:transparent}
.nc-node .port{
  position:absolute;width:9px;height:9px;border-radius:50%;background:#0b1c40;
  border:2px solid #4ec8ff;top:50%;transform:translateY(-50%);
}
.nc-node .port.l{left:-5px}.nc-node .port.r{right:-5px}

.ed-status{
  height:30px;flex:none;display:flex;align-items:center;gap:18px;padding:0 14px;
  background:rgba(9,18,44,.95);border-top:1px solid var(--line);font-size:11px;color:var(--muted);
}
.legend{display:flex;align-items:center;gap:6px}
.legend i{width:9px;height:9px;border-radius:2px;display:inline-block}
.ed-status .spacer{flex:1}

.props{
  width:252px;flex:none;background:rgba(9,18,44,.94);border-left:1px solid var(--line);
  padding:12px;overflow-y:auto;
}
.props h3{margin:0 0 12px;font-size:14px;color:#8fe6ff;letter-spacing:1px}
.props .group{border:1px solid var(--line);border-radius:9px;margin-bottom:12px;overflow:hidden}
.props .group>.gt{
  padding:8px 10px;background:rgba(30,70,140,.28);font-size:12px;font-weight:700;
  display:flex;justify-content:space-between;align-items:center;
}
.props .gb{padding:9px 10px}
.props label{display:block;font-size:11px;color:#7f9dc4;margin:8px 0 4px}
.props input,.props select,.props textarea{
  width:100%;padding:7px 9px;border-radius:6px;background:rgba(6,14,34,.9);
  border:1px solid rgba(90,160,255,.3);color:var(--text);font-size:12px;
}
.props input:focus,.props select:focus{border-color:var(--cyan);box-shadow:0 0 0 2px rgba(40,225,255,.15)}
.props .kv{display:flex;justify-content:space-between;font-size:11px;color:#8fb0d4;margin:6px 0}
.props .kv b{color:#dceeff;font-weight:600}
.props .empty{font-size:12px;color:#6f8db4;line-height:1.8;padding:14px 2px}
.props .hint{font-size:11px;line-height:1.7;color:#6f8db4;margin-top:10px}
.toast{
  position:fixed;left:50%;bottom:56px;transform:translate(-50%,14px);z-index:80;
  padding:10px 18px;border-radius:9px;background:#10234c;border:1px solid var(--line-strong);
  box-shadow:0 10px 30px rgba(0,0,0,.5);font-size:13px;opacity:0;pointer-events:none;transition:.25s;
}
.toast.show{opacity:1;transform:translate(-50%,0)}

#printArea{display:none}

/* ---------- 响应式 ---------- */
@media(max-width:1000px){
  .float-card{display:none}
  .laptop{width:94%}
  .hl-grid{grid-template-columns:repeat(2,1fr)}
  .hl:nth-child(3){border-left:none}
  .hl:nth-child(n+3){border-top:1px solid rgba(90,170,255,.22)}
  .props{width:210px}
  .palette{width:150px}
}
@media(max-width:760px){
  .stage{overflow:hidden}
  .laptop .base{margin:0;transform:rotateX(52deg) scale(.96)}
  .hero h1{font-size:clamp(46px,13vw,64px);letter-spacing:-2px}
  .nav a:not(.btn){display:none}
  .subtitle{letter-spacing:2px}
  .subtitle::before,.subtitle::after{content:"";margin:0}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .feature{font-size:15px;padding:14px}
  .hl-grid{grid-template-columns:1fr 1fr}
  .ed-topbar{gap:8px;padding:0 10px;flex-wrap:wrap;height:auto;min-height:56px;padding-block:8px}
  .ed-topbar .crumb,.save-state{display:none}
  .ed-toolbar{overflow-x:auto;overflow-y:hidden;flex-wrap:nowrap}
  .ed-toolbar .spacer,.ed-toolbar #nodeCount{display:none}
  .palette{width:100%;height:96px;display:flex;gap:8px;align-items:center;overflow-x:auto;padding:8px;border-right:none;border-bottom:1px solid var(--line)}
  .pal-tabs,.pal-title,.pal-tip{display:none}
  .pal-item{flex:none;margin:0;white-space:nowrap}
  .ed-main{flex-direction:column}
  .workspace{flex:1;min-height:0}
  .props{position:absolute;right:0;top:0;bottom:0;width:min(280px,86vw);z-index:30;display:none;box-shadow:-12px 0 30px rgba(0,0,0,.5)}
  .props.open{display:block}
  .props-toggle{display:inline-flex!important}
  .ed-status .legend{display:none}
}
.props-toggle{display:none}

/* ---------- 打印 / 导出 PDF ---------- */
@media print{
  body.editor{height:auto;overflow:visible;background:#fff}
  .ed-topbar,.ed-main,.ed-status,.toast{display:none!important}
  #printArea{display:block!important;padding:0;margin:0}
  #printArea svg{width:100%;height:auto;max-height:96vh}
  @page{size:A4 landscape;margin:10mm}
}