/* ============================================================
   《AI 新手村》全站设计系统
   风格：明快友好（奶油底 + 深紫墨描边 + 四分类彩色 + 贴纸卡片）
   原则：全站视觉统一，所有页面共用这一套
   ============================================================ */

/* ---------- 设计变量（改颜色只改这里） ---------- */
:root{
  --bg:#fff8ec;            /* 奶油底色 */
  --bg2:#fffdf6;           /* 更浅的纸色 */
  --paper:#ffffff;         /* 卡片白 */
  --ink:#3d3358;           /* 深紫墨：文字 + 描边 */
  --ink-soft:#5d5378;      /* 正文紫灰 */
  --muted:#8a7f9e;         /* 辅助文字 */
  --coral:#ff6b6b;         /* 分类色：聊天助手 */
  --teal:#1fc2ae;          /* 分类色：编程·Agent */
  --amber:#ffb400;         /* 分类色：创作工具 */
  --violet:#8e6ff7;        /* 分类色：办公效率 */
  --green:#34c98e;         /* 成功 / 正确 */
  --red:#ff5a5a;           /* 错误 */
  --hl:#ffd166;            /* 荧光笔黄 */
  --b:2.5px solid var(--ink);
  --r:20px;                /* 大圆角 */
  --r-s:14px;              /* 小圆角 */
  --sh-2:2px 2px 0 var(--ink);
  --sh-3:3px 3px 0 var(--ink);
  --sh-5:5px 6px 0 rgba(61,51,88,.92);
  --sh-8:8px 9px 0 rgba(61,51,88,.92);
  --font:"Segoe UI","Microsoft YaHei",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;zoom:1.08}   /* 整站默认轻度放大，看着更舒服 */
body{background:var(--bg);color:var(--ink);font-family:var(--font);min-height:100vh;overflow-x:hidden}
::selection{background:var(--hl);color:var(--ink)}
a{color:inherit;text-decoration:none}
button{font-family:var(--font)}

/* ---------- 背景点缀：彩色圆点 ---------- */
.doodles{position:fixed;inset:0;z-index:-1;pointer-events:none;overflow:hidden}
.doodle{position:absolute;border-radius:50%;opacity:.5;animation:floaty 7s ease-in-out infinite}
.doodle:nth-child(2n){animation-duration:9s;animation-delay:1.2s}
.doodle:nth-child(3n){animation-duration:11s;animation-delay:2.4s}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-16px)}}

/* ---------- 顶部导航（全站统一，由 core.js 注入） ---------- */
header.site{
  position:sticky;top:0;z-index:80;
  background:rgba(255,248,236,.9);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:var(--b);
}
.nav{max-width:1180px;margin:0 auto;padding:12px 24px;display:flex;align-items:center;gap:22px}
.logo{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:800;flex-shrink:0}
.logo-mark{
  width:34px;height:34px;border-radius:10px;background:var(--coral);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:17px;
  border:var(--b);transform:rotate(-6deg);box-shadow:var(--sh-2);transition:transform .25s;
}
.logo:hover .logo-mark{transform:rotate(6deg) scale(1.08)}
.nav-links{display:flex;gap:4px;margin-left:auto}
.nav-links a{
  padding:8px 16px;border-radius:999px;font-size:14.5px;font-weight:700;color:var(--ink);
  border:2.5px solid transparent;transition:all .15s;
}
.nav-links a:hover{background:#fff;border-color:var(--ink);box-shadow:var(--sh-2);transform:translate(-1px,-1px)}
.nav-links a.on{background:var(--ink);color:#fff}
/* 经验值药丸（点击进成就页） */
.xp-pill{
  display:flex;align-items:center;gap:9px;background:#fff;border:var(--b);
  border-radius:999px;padding:6px 14px 6px 8px;box-shadow:var(--sh-2);cursor:pointer;
  transition:transform .15s,box-shadow .15s;flex-shrink:0;
}
.xp-pill:hover{transform:translate(-1px,-2px);box-shadow:4px 4px 0 var(--ink)}
.xp-pill .face{width:26px;height:26px;border-radius:50%;background:var(--hl);border:2px solid var(--ink);display:flex;align-items:center;justify-content:center;font-size:14px}
.xp-pill .t{font-size:12px;font-weight:800;line-height:1.25}
.xp-pill .t small{display:block;font-size:10.5px;color:var(--muted);font-weight:700}
.xp-pill.bump{animation:bump .5s}
@keyframes bump{30%{transform:scale(1.12) rotate(-2deg)}60%{transform:scale(.96)}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:800;color:#fff;background:var(--coral);
  padding:12px 26px;border-radius:999px;border:var(--b);box-shadow:var(--sh-3);
  cursor:pointer;transition:transform .15s,box-shadow .15s,background .2s;user-select:none;
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:5px 5px 0 var(--ink)}
.btn:active{transform:translate(1px,1px) scale(.97);box-shadow:1px 1px 0 var(--ink)}
.btn.teal{background:var(--teal)}
.btn.violet{background:var(--violet)}
.btn.amber{background:var(--amber);color:var(--ink)}
.btn.ghost{background:#fff;color:var(--ink)}
.btn.ink{background:var(--ink)}
.btn.sm{padding:8px 18px;font-size:13.5px}
.btn.lg{padding:15px 34px;font-size:17px}
.btn[disabled]{opacity:.45;pointer-events:none}

/* ---------- 通用卡片 / 区块 ---------- */
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.panel{background:var(--paper);border:var(--b);border-radius:var(--r);box-shadow:var(--sh-5)}
.sec-title{font-size:clamp(24px,3.2vw,32px);font-weight:800;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.sec-title .hl{background:linear-gradient(transparent 58%,var(--hl) 58%);padding:0 4px}
.sec-sub{color:var(--muted);font-weight:600;font-size:14.5px;margin-top:8px;line-height:1.8}
.tag{
  display:inline-flex;align-items:center;gap:4px;font-size:11.5px;font-weight:800;
  padding:4px 10px;border-radius:999px;border:2px solid var(--ink);background:#fff;
}
.tag.free{background:#c9f4d4}.tag.part{background:#ffe9b8}.tag.paid{background:#ffd6d6}
.tag.cn{background:#d8f6f1}.tag.vpn{background:#eee9ff}

/* ---------- 村长波波（吉祥物气泡） ---------- */
.mascot{display:flex;gap:14px;align-items:flex-start}
.mascot .m-face{
  width:62px;height:62px;border-radius:50%;flex-shrink:0;font-size:32px;
  background:var(--hl);border:var(--b);display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-3);animation:bob 3.2s ease-in-out infinite;
}
@keyframes bob{0%,100%{transform:translateY(0) rotate(-3deg)}50%{transform:translateY(-7px) rotate(3deg)}}
.bubble{
  position:relative;background:#fff;border:var(--b);border-radius:var(--r-s);
  padding:14px 18px;font-size:14.5px;font-weight:600;color:var(--ink-soft);
  line-height:1.85;box-shadow:var(--sh-3);
}
.bubble::before{
  content:"";position:absolute;left:-11px;top:20px;width:16px;height:16px;
  background:#fff;border-left:var(--b);border-bottom:var(--b);transform:rotate(45deg);
}
.bubble b{color:var(--ink)}
.bubble .who{font-size:11.5px;font-weight:800;color:var(--coral);display:block;margin-bottom:3px}

/* ---------- 工具卡片墙（首页） ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(252px,1fr));gap:20px}
.card{
  background:var(--paper);border:var(--b);border-radius:var(--r);overflow:hidden;cursor:pointer;
  box-shadow:var(--sh-5);transition:transform .18s,box-shadow .18s;position:relative;
}
.card:hover{transform:translate(-3px,-4px) rotate(-.5deg);box-shadow:var(--sh-8)}
.card:active{transform:translate(0,0) scale(.98);box-shadow:var(--sh-3)}
.card .strip{height:9px}
.card[data-cat="chat"] .strip{background:var(--coral)}
.card[data-cat="agent"] .strip{background:var(--teal)}
.card[data-cat="create"] .strip{background:var(--amber)}
.card[data-cat="office"] .strip{background:var(--violet)}
.card-body{padding:18px 20px 20px}
.card-top{display:flex;align-items:center;gap:12px;margin-bottom:11px}
.avatar{
  width:48px;height:48px;border-radius:14px;font-size:24px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;border:var(--b);transition:transform .2s;
}
.card:hover .avatar{transform:rotate(-8deg) scale(1.07)}
.card[data-cat="chat"] .avatar{background:#ffe3e3}
.card[data-cat="agent"] .avatar{background:#d8f6f1}
.card[data-cat="create"] .avatar{background:#fff0c9}
.card[data-cat="office"] .avatar{background:#eae3ff}
.card h3{font-size:17px;font-weight:800}
.card .cat{font-size:11.5px;color:var(--muted);font-weight:700;margin-top:2px}
.card p{font-size:13.5px;color:var(--ink-soft);line-height:1.7;min-height:46px;font-weight:500}
.card .chips{display:flex;gap:6px;margin-top:12px;flex-wrap:wrap}
.card-foot{display:flex;align-items:center;justify-content:space-between;margin-top:13px;padding-top:12px;border-top:2px dashed #d9d2e8}
.stars{font-size:12px;letter-spacing:1px}
.stars i{font-style:normal;opacity:.2}
.stars-label{font-size:11px;color:var(--muted);font-weight:700;margin-right:5px}
.go-mini{font-size:12.5px;font-weight:800;color:#fff;background:var(--ink);padding:6px 13px;border-radius:999px;transition:background .2s}
.card:hover .go-mini{background:var(--coral)}

/* ---------- 分类标签页 ---------- */
.tabs{display:flex;gap:11px;flex-wrap:wrap}
.tab{
  padding:9px 20px;border-radius:999px;font-size:14px;font-weight:800;cursor:pointer;
  background:#fff;border:var(--b);box-shadow:var(--sh-2);transition:all .15s;user-select:none;
}
.tab:hover{transform:translate(-2px,-2px);box-shadow:4px 4px 0 var(--ink)}
.tab:active{transform:scale(.95)}
.tab.active{color:#fff;background:var(--ink)}
.tab[data-cat="chat"].active{background:var(--coral)}
.tab[data-cat="agent"].active{background:var(--teal)}
.tab[data-cat="create"].active{background:var(--amber);color:var(--ink)}
.tab[data-cat="office"].active{background:var(--violet)}

/* ---------- 搜索框 ---------- */
.search-wrap{position:relative;max-width:520px}
.search{
  width:100%;padding:14px 20px 14px 48px;font-size:15px;color:var(--ink);font-weight:600;
  background:#fff;border:var(--b);border-radius:999px;outline:none;
  box-shadow:var(--sh-3);transition:transform .15s,box-shadow .15s;font-family:var(--font);
}
.search::placeholder{color:#b6abc9;font-weight:500}
.search:focus{transform:translate(-2px,-2px);box-shadow:5px 5px 0 var(--ink)}
.search-ico{position:absolute;left:18px;top:50%;transform:translateY(-50%);font-size:16px}

/* ---------- 闯关地图 ---------- */
.chapter{margin-top:34px}
.ch-head{
  display:flex;align-items:center;gap:14px;background:var(--paper);
  border:var(--b);border-radius:var(--r);padding:16px 22px;box-shadow:var(--sh-3);
}
.ch-head .ch-emoji{font-size:30px}
.ch-head h3{font-size:19px;font-weight:800}
.ch-head .ch-sub{font-size:12.5px;color:var(--muted);font-weight:700;margin-top:2px}
.ch-head .ch-prog{margin-left:auto;font-size:13px;font-weight:800;background:var(--bg);border:2px solid var(--ink);padding:5px 13px;border-radius:999px}
/* 之字形关卡路径 */
.path{position:relative;padding:26px 0 6px;margin-left:8px}
.path::before{
  content:"";position:absolute;left:31px;top:10px;bottom:10px;width:0;
  border-left:3px dashed #cfc6e4;
}
.node-row{position:relative;display:flex;align-items:center;gap:16px;padding:11px 0;padding-left:0}
.node{
  width:64px;height:64px;border-radius:50%;flex-shrink:0;cursor:pointer;position:relative;z-index:1;
  border:var(--b);display:flex;align-items:center;justify-content:center;font-size:26px;
  background:#fff;box-shadow:var(--sh-3);transition:transform .18s,box-shadow .18s;
}
.node:hover{transform:translate(-2px,-3px) scale(1.04);box-shadow:5px 6px 0 var(--ink)}
.node:active{transform:scale(.94)}
.node .num{
  position:absolute;top:-7px;left:-7px;width:24px;height:24px;border-radius:50%;
  background:var(--ink);color:#fff;font-size:11.5px;font-weight:800;
  display:flex;align-items:center;justify-content:center;border:2px solid #fff;
}
.node.done{background:#c9f4d4}
.node.done::after{content:"⭐";position:absolute;bottom:-9px;right:-9px;font-size:19px;filter:drop-shadow(1px 1px 0 #fff)}
.node.now{animation:breath 1.8s ease-in-out infinite}
@keyframes breath{0%,100%{box-shadow:var(--sh-3),0 0 0 0 rgba(255,107,107,.45)}50%{box-shadow:var(--sh-3),0 0 0 12px rgba(255,107,107,0)}}
.node.lock{background:#eeeaf6;filter:grayscale(.3);cursor:not-allowed;opacity:.75}
.node-info{
  background:var(--paper);border:var(--b);border-radius:var(--r-s);
  padding:11px 16px;box-shadow:var(--sh-2);flex:1;max-width:430px;
  transition:transform .18s;cursor:pointer;
}
.node-info:hover{transform:translate(-1px,-2px)}
.node-info h4{font-size:15px;font-weight:800;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.node-info .lv-type{font-size:10.5px;padding:2px 9px;border-radius:999px;border:2px solid var(--ink);font-weight:800}
.lv-type.concept{background:#ffe9b8}.lv-type.sim{background:#d8f6f1}.lv-type.exam{background:#ffd6d6}
.node-info p{font-size:12.5px;color:var(--muted);font-weight:600;margin-top:4px}
.node-info .xp-get{font-size:11.5px;font-weight:800;color:var(--amber)}
.shake{animation:shake .45s}
@keyframes shake{20%{transform:translateX(-7px) rotate(-2deg)}40%{transform:translateX(6px)}60%{transform:translateX(-4px) rotate(2deg)}80%{transform:translateX(3px)}}

/* ---------- 关卡页 ---------- */
.lv-top{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.lv-back{
  width:42px;height:42px;border-radius:50%;background:#fff;border:var(--b);box-shadow:var(--sh-2);
  font-size:17px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:transform .15s;
}
.lv-back:hover{transform:translate(-2px,-2px)}
.lv-title{font-size:clamp(20px,3vw,27px);font-weight:800}
.lv-steps{display:flex;gap:7px;margin-left:auto}
.lv-dot{width:13px;height:13px;border-radius:50%;border:2px solid var(--ink);background:#fff;transition:background .3s,transform .3s}
.lv-dot.on{background:var(--amber);transform:scale(1.25)}
.lv-dot.done{background:var(--green)}
.lesson{margin-top:22px}
.lesson-card{background:var(--paper);border:var(--b);border-radius:var(--r);box-shadow:var(--sh-5);padding:26px 30px;margin-top:18px}
.lesson-card h3{font-size:18px;font-weight:800;display:inline-block;background:linear-gradient(transparent 60%,var(--hl) 60%);padding:0 3px;margin-bottom:12px}
.lesson-card p{font-size:15px;color:var(--ink-soft);line-height:2;font-weight:500}
.lesson-card p+p{margin-top:10px}
.lesson-card b{color:var(--ink);background:linear-gradient(transparent 65%,#ffe9b8 65%)}
.metaphor{
  margin-top:16px;background:#fff8e1;border:2.5px dashed var(--amber);border-radius:var(--r-s);
  padding:15px 19px;font-size:14.5px;line-height:1.95;color:#7a5b13;font-weight:600;
}
.metaphor::before{content:"🍬 打个比方";display:block;font-weight:800;color:#b07900;margin-bottom:5px;font-size:13px}
.factoid{
  margin-top:16px;background:#eef9f5;border:2.5px dashed var(--teal);border-radius:var(--r-s);
  padding:15px 19px;font-size:14px;line-height:1.9;color:#1d6e5e;font-weight:600;
}
.factoid::before{content:"💡 冷知识";display:block;font-weight:800;color:#0e8d77;margin-bottom:5px;font-size:13px}

/* ---------- 答题 ---------- */
.quiz-q{font-size:17px;font-weight:800;line-height:1.7}
.quiz-tip{font-size:12.5px;color:var(--muted);font-weight:700;margin-top:6px}
.opts{display:flex;flex-direction:column;gap:13px;margin-top:20px}
.opt{
  text-align:left;background:#fff;border:var(--b);border-radius:var(--r-s);
  padding:15px 19px;font-size:15px;font-weight:700;color:var(--ink);cursor:pointer;
  box-shadow:var(--sh-2);transition:transform .15s,box-shadow .15s,background .2s;
  display:flex;align-items:center;gap:13px;
}
.opt .abc{
  width:30px;height:30px;border-radius:50%;background:var(--bg);border:2px solid var(--ink);
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;flex-shrink:0;
}
.opt:hover{transform:translate(-2px,-2px);box-shadow:4px 4px 0 var(--ink)}
.opt.right{background:#c9f4d4;animation:popOk .45s}
.opt.right .abc{background:var(--green);color:#fff}
.opt.wrong{background:#ffd6d6;animation:shake .45s}
.opt.wrong .abc{background:var(--red);color:#fff}
.opt.dim{opacity:.45;pointer-events:none}
@keyframes popOk{35%{transform:scale(1.04) rotate(.5deg)}70%{transform:scale(.98)}}
.explain{
  margin-top:16px;border-radius:var(--r-s);padding:14px 18px;font-size:14px;line-height:1.85;font-weight:600;
  border:2.5px solid var(--ink);display:none;
}
.explain.ok{display:block;background:#eafaf3;color:#1d6e5e;animation:popOk .4s}
.explain.no{display:block;background:#fff1f1;color:#a33;animation:popOk .4s}

/* ---------- 模拟聊天（实操关） ---------- */
.chat-win{background:var(--paper);border:var(--b);border-radius:var(--r);box-shadow:var(--sh-5);overflow:hidden}
.chat-bar{display:flex;align-items:center;gap:10px;padding:13px 18px;border-bottom:var(--b);background:#fffdf6}
.chat-bar .cdot{width:12px;height:12px;border-radius:50%;border:2px solid var(--ink)}
.chat-bar .cdot:nth-child(1){background:var(--coral)}
.chat-bar .cdot:nth-child(2){background:var(--amber)}
.chat-bar .cdot:nth-child(3){background:var(--teal)}
.chat-bar span{font-size:13px;font-weight:800;color:var(--muted);margin-left:6px}
.chat-box{padding:20px;display:flex;flex-direction:column;gap:14px;min-height:300px;max-height:430px;overflow-y:auto}
.msg{display:flex;gap:10px;max-width:86%;animation:msgIn .35s ease}
@keyframes msgIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.msg .m-ava{width:38px;height:38px;border-radius:50%;border:2px solid var(--ink);background:var(--hl);display:flex;align-items:center;justify-content:center;font-size:19px;flex-shrink:0}
.msg .m-txt{background:#fff8e1;border:2px solid var(--ink);border-radius:4px 16px 16px 16px;padding:11px 15px;font-size:14.5px;font-weight:600;line-height:1.85;color:var(--ink-soft)}
.msg.me{align-self:flex-end;flex-direction:row-reverse}
.msg.me .m-ava{background:#d8f6f1}
.msg.me .m-txt{background:#eafaf3;border-radius:16px 4px 16px 16px}
.typing{display:inline-flex;gap:5px;padding:6px 2px}
.typing i{width:8px;height:8px;border-radius:50%;background:var(--muted);animation:blink 1s infinite}
.typing i:nth-child(2){animation-delay:.18s}
.typing i:nth-child(3){animation-delay:.36s}
@keyframes blink{0%,100%{opacity:.25;transform:translateY(0)}50%{opacity:1;transform:translateY(-4px)}}
.chat-input{display:flex;gap:10px;padding:14px 16px;border-top:var(--b);background:#fffdf6}
.chat-input input{
  flex:1;padding:11px 16px;font-size:14.5px;font-weight:600;border:var(--b);border-radius:999px;
  outline:none;font-family:var(--font);background:#fff;color:var(--ink);
}
.chat-input input:focus{box-shadow:3px 3px 0 var(--ink)}
.sugg{display:flex;gap:9px;flex-wrap:wrap;padding:12px 16px 2px}
.sugg-chip{
  font-size:13px;font-weight:700;background:#fff;border:2px solid var(--ink);border-radius:999px;
  padding:7px 14px;cursor:pointer;box-shadow:var(--sh-2);transition:all .15s;
}
.sugg-chip:hover{transform:translate(-1px,-2px);box-shadow:3px 3px 0 var(--ink);background:var(--hl)}
.sugg-chip:active{transform:scale(.94)}

/* ---------- 提示词拼装台 ---------- */
.pieces{display:flex;gap:11px;flex-wrap:wrap;margin-top:16px}
.piece{
  font-size:13.5px;font-weight:700;background:#fff;border:2.5px dashed var(--muted);border-radius:var(--r-s);
  padding:10px 15px;cursor:pointer;transition:all .18s;color:var(--ink-soft);
}
.piece:hover{transform:translateY(-2px);border-color:var(--ink)}
.piece.used{border-style:solid;border-color:var(--ink);background:#eafaf3;box-shadow:var(--sh-2);color:var(--ink)}
.piece .p-tag{font-size:10.5px;font-weight:800;color:#fff;background:var(--violet);border-radius:6px;padding:1px 7px;margin-right:7px}
.prompt-preview{
  margin-top:16px;background:#fffdf0;border:var(--b);border-radius:var(--r-s);padding:16px 19px;
  font-size:14.5px;font-weight:600;line-height:2;min-height:64px;color:var(--ink-soft);
}
.meter{margin-top:14px;height:24px;background:#f0ebdd;border:var(--b);border-radius:999px;overflow:hidden;position:relative}
.meter-fill{height:100%;width:0;background:linear-gradient(90deg,var(--coral),var(--amber),var(--green));transition:width .5s cubic-bezier(.2,1.2,.4,1)}
.meter-label{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800}

/* ---------- Agent 模拟 ---------- */
.task-pick{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;margin-top:16px}
.task-card{
  background:#fff;border:var(--b);border-radius:var(--r-s);padding:17px;cursor:pointer;
  box-shadow:var(--sh-2);transition:all .15s;font-weight:700;font-size:14.5px;text-align:center;
}
.task-card:hover{transform:translate(-2px,-2px);box-shadow:4px 4px 0 var(--ink);background:#fff8e1}
.agent-steps{display:flex;flex-direction:column;gap:12px;margin-top:18px}
.a-step{
  display:flex;gap:13px;align-items:center;background:#fff;border:2.5px solid #d9d2e8;border-radius:var(--r-s);
  padding:13px 17px;opacity:.45;transition:all .35s;
}
.a-step.on{opacity:1;border-color:var(--ink);box-shadow:var(--sh-2)}
.a-step.ok{opacity:1;border-color:var(--green);background:#f3fcf8}
.a-step .a-ico{width:34px;height:34px;border-radius:50%;border:2px solid var(--ink);background:var(--bg);display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}
.a-step.ok .a-ico{background:var(--green);color:#fff}
.a-step .a-t{font-size:14.5px;font-weight:700}
.a-step .a-d{font-size:12.5px;color:var(--muted);font-weight:600;margin-top:2px}
.spin{display:inline-block;animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.deliver{
  margin-top:18px;background:#fffdf0;border:var(--b);border-radius:var(--r);padding:22px 24px;
  box-shadow:var(--sh-3);animation:popOk .5s;
}
.deliver h4{font-size:16px;font-weight:800;margin-bottom:10px}
.deliver p,.deliver li{font-size:14px;color:var(--ink-soft);line-height:2;font-weight:600}
.deliver ul{padding-left:22px}

/* ---------- 配对游戏 ---------- */
.match-area{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:18px}
.match-col{display:flex;flex-direction:column;gap:12px}
.match-item{
  background:#fff;border:var(--b);border-radius:var(--r-s);padding:13px 16px;cursor:pointer;
  font-size:14px;font-weight:700;box-shadow:var(--sh-2);transition:all .15s;text-align:center;
}
.match-item:hover{transform:translate(-1px,-2px)}
.match-item.sel{background:var(--hl);transform:scale(1.03)}
.match-item.ok{background:#c9f4d4;border-color:var(--green);pointer-events:none;opacity:.8}
.match-item.bad{animation:shake .4s;background:#ffd6d6}

/* ---------- 毕业证书 ---------- */
.cert{
  background:#fffdf0;border:4px double var(--ink);border-radius:var(--r);padding:36px 30px;text-align:center;
  box-shadow:var(--sh-8);position:relative;overflow:hidden;
}
.cert::before{content:"🎓";position:absolute;font-size:120px;opacity:.07;right:-16px;bottom:-26px;transform:rotate(-14deg)}
.cert .c-head{font-size:13px;font-weight:800;color:var(--muted);letter-spacing:6px}
.cert h2{font-size:30px;font-weight:800;margin:10px 0 18px}
.cert .c-name{font-size:24px;font-weight:800;color:var(--coral);border-bottom:3px solid var(--ink);display:inline-block;padding:0 18px 4px}
.cert p{font-size:14.5px;color:var(--ink-soft);font-weight:600;line-height:2.1;margin-top:16px}
.cert .seal{
  position:absolute;right:26px;bottom:24px;width:86px;height:86px;border-radius:50%;
  border:3px solid var(--red);color:var(--red);display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:800;transform:rotate(-14deg);opacity:.85;line-height:1.4;text-align:center;
}

/* ---------- 工具详情页 ---------- */
.tool-hero{display:flex;gap:20px;align-items:center;flex-wrap:wrap}
.tool-hero .avatar{width:84px;height:84px;font-size:42px;border-radius:22px}
.tool-hero h1{font-size:clamp(26px,4vw,36px);font-weight:800}
.tool-hero .by{font-size:13.5px;color:var(--muted);font-weight:700;margin-top:4px}
.tool-hero .chips{display:flex;gap:8px;margin-top:11px;flex-wrap:wrap}
.t-sec{background:var(--paper);border:var(--b);border-radius:var(--r);box-shadow:var(--sh-5);padding:26px 30px;margin-top:22px}
.t-sec>h2{font-size:20px;font-weight:800;display:flex;align-items:center;gap:10px;margin-bottom:16px}
.t-sec>h2 .n{
  width:34px;height:34px;border-radius:50%;background:var(--ink);color:#fff;font-size:15px;
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.t-sec p{font-size:15px;color:var(--ink-soft);line-height:2;font-weight:500}
.t-sec p+p{margin-top:10px}
.t-sec b{color:var(--ink);background:linear-gradient(transparent 65%,#ffe9b8 65%)}
.can-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(225px,1fr));gap:14px}
.can-item{background:#fffdf6;border:2.5px solid var(--ink);border-radius:var(--r-s);padding:16px 18px;transition:transform .18s,box-shadow .18s}
.can-item:hover{transform:translate(-2px,-2px);box-shadow:var(--sh-3)}
.can-item h4{font-size:15px;font-weight:800;margin-bottom:7px}
.can-item p{font-size:13.5px;line-height:1.8}
.steps-l{display:flex;flex-direction:column;gap:13px}
.step-l{display:flex;gap:15px;background:#fffdf6;border:2.5px solid var(--ink);border-radius:var(--r-s);padding:15px 18px;transition:transform .18s}
.step-l:hover{transform:translateX(4px)}
.step-l .s-n{
  width:30px;height:30px;border-radius:50%;flex-shrink:0;font-size:14px;font-weight:800;
  display:flex;align-items:center;justify-content:center;color:#fff;background:var(--teal);border:2px solid var(--ink);
}
.step-l .s-t{font-size:14.5px;font-weight:700;line-height:1.7}
.step-l .s-d{font-size:13.5px;color:var(--ink-soft);font-weight:500;line-height:1.85;margin-top:4px}
.step-l .s-note{margin-top:8px;font-size:12.5px;background:#fff8e1;border:2px dashed var(--amber);border-radius:10px;padding:8px 12px;color:#7a5b13;font-weight:600;line-height:1.7}
.faq details{border:2.5px solid var(--ink);border-radius:var(--r-s);background:#fffdf6;margin-top:12px;overflow:hidden}
.faq summary{
  padding:14px 18px;font-size:14.5px;font-weight:800;cursor:pointer;list-style:none;
  display:flex;align-items:center;gap:10px;user-select:none;transition:background .2s;
}
.faq summary::before{content:"❓"}
.faq summary:hover{background:#fff4dd}
.faq details[open] summary{border-bottom:2px dashed #d9d2e8;background:#fff8e1}
.faq .faq-a{padding:13px 18px;font-size:14px;color:var(--ink-soft);line-height:1.95;font-weight:500}
.pit{
  display:flex;gap:11px;align-items:flex-start;background:#fff1f1;border:2.5px solid var(--red);
  border-radius:var(--r-s);padding:13px 17px;margin-top:12px;font-size:14px;line-height:1.85;
  color:#a33;font-weight:600;
}
.pit::before{content:"⚠️";font-size:17px}
.writing{
  text-align:center;padding:46px 20px;background:#fff8e1;border:2.5px dashed var(--amber);
  border-radius:var(--r);margin-top:22px;
}
.writing .w-emoji{font-size:52px;display:inline-block;animation:bob 2.6s ease-in-out infinite}
.writing h3{font-size:19px;font-weight:800;margin-top:12px}
.writing p{font-size:14px;color:var(--muted);font-weight:600;margin-top:8px;line-height:1.9}

/* ---------- 徽章墙 ---------- */
.badges{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:15px}
.badge-it{
  background:var(--paper);border:var(--b);border-radius:var(--r-s);padding:18px 13px;text-align:center;
  box-shadow:var(--sh-2);transition:transform .18s;
}
.badge-it:hover{transform:translate(-2px,-3px) rotate(-1deg)}
.badge-it .b-emoji{font-size:36px;filter:grayscale(1);opacity:.35;transition:all .3s}
.badge-it.got .b-emoji{filter:none;opacity:1;animation:popOk .5s}
.badge-it h5{font-size:13.5px;font-weight:800;margin-top:9px}
.badge-it p{font-size:11px;color:var(--muted);font-weight:600;margin-top:4px;line-height:1.6}
.badge-it.got{background:#fff8e1}

/* ---------- 进度总览 ---------- */
.me-panel{display:flex;gap:22px;align-items:center;flex-wrap:wrap;padding:24px 28px}
.me-face{width:84px;height:84px;border-radius:50%;background:var(--hl);border:var(--b);box-shadow:var(--sh-3);display:flex;align-items:center;justify-content:center;font-size:42px;flex-shrink:0}
.me-info{flex:1;min-width:240px}
.me-title{font-size:21px;font-weight:800;display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.me-next{font-size:12.5px;color:var(--muted);font-weight:700;margin-top:5px}
.xp-bar{margin-top:12px;height:22px;background:#f0ebdd;border:var(--b);border-radius:999px;overflow:hidden;position:relative}
.xp-fill{height:100%;width:0;background:linear-gradient(90deg,var(--amber),var(--coral));transition:width .8s cubic-bezier(.2,1,.4,1);border-radius:999px}
.xp-num{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:11.5px;font-weight:800}
.me-stats{display:flex;gap:12px;flex-wrap:wrap}
.me-stat{background:#fffdf6;border:2.5px solid var(--ink);border-radius:var(--r-s);padding:10px 18px;text-align:center;box-shadow:var(--sh-2)}
.me-stat b{font-size:21px;display:block}
.me-stat span{font-size:11px;color:var(--muted);font-weight:700}

/* ---------- 提示弹层（Toast） ---------- */
.toasts{position:fixed;right:22px;top:86px;z-index:200;display:flex;flex-direction:column;gap:13px;pointer-events:none}
.toast{
  background:#fff;border:3px solid var(--ink);border-radius:16px;box-shadow:6px 7px 0 rgba(61,51,88,.92);
  padding:17px 24px;font-size:16.5px;font-weight:800;display:flex;align-items:center;gap:14px;
  animation:toastIn .45s cubic-bezier(.2,1.3,.4,1);max-width:min(420px,84vw);line-height:1.5;
}
.toast.out{animation:toastOut .35s forwards}
.toast .t-emoji{font-size:30px;flex-shrink:0}
.toast small{display:block;font-size:13px;color:var(--muted);font-weight:600;margin-top:2px}
@keyframes toastIn{from{opacity:0;transform:translateX(60px) scale(.9)}to{opacity:1;transform:none}}
@keyframes toastOut{to{opacity:0;transform:translateX(60px)}}

/* ---------- 彩带 ---------- */
.confetti{position:fixed;inset:0;pointer-events:none;z-index:300;overflow:hidden}
.cf{position:absolute;width:11px;height:11px;border:2px solid var(--ink);animation:cfFall linear forwards}
@keyframes cfFall{
  0%{transform:translateY(-30px) rotate(0)}
  100%{transform:translateY(105vh) rotate(720deg);opacity:.7}
}

/* ---------- 页脚 ---------- */
footer.site{border-top:var(--b);margin-top:56px;padding:32px 24px 44px;text-align:center;color:var(--muted);font-size:13px;line-height:2.1;font-weight:600;background:var(--bg2)}
footer.site b{color:var(--ink)}

/* ---------- 入场 / 滚动显现动画 ---------- */
.reveal{opacity:0;transform:translateY(22px) scale(.985)}
.reveal.in{opacity:1;transform:none;transition:opacity .6s ease,transform .6s cubic-bezier(.2,1.2,.4,1)}
.pop-in{animation:popIn .55s cubic-bezier(.2,1.3,.4,1) both}
@keyframes popIn{from{opacity:0;transform:translateY(22px) scale(.97)}to{opacity:1;transform:none}}

/* ---------- 开工包 ---------- */
/* 卡片复用 .card，补四类配色（play 黄 / use 红 / show 青 / pro 紫） */
.card[data-cat="play"] .strip{background:var(--amber)}
.card[data-cat="use"]  .strip{background:var(--coral)}
.card[data-cat="show"] .strip{background:var(--teal)}
.card[data-cat="hack"]  .strip{background:var(--violet)}
.card[data-cat="play"] .avatar{background:#fff0c9}
.card[data-cat="use"]  .avatar{background:#ffe3e3}
.card[data-cat="show"] .avatar{background:#d8f6f1}
.card[data-cat="hack"]  .avatar{background:#eae3ff}
.kit-result{font-size:13.5px;color:var(--ink-soft);font-weight:500;line-height:1.7;min-height:42px}
/* 开工包详情弹窗 */
.kit-overlay{position:fixed;inset:0;z-index:150;display:none;align-items:flex-start;justify-content:center;background:rgba(61,51,88,.55);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);padding:40px 18px;overflow-y:auto}
.kit-overlay.show{display:flex;animation:fadeIn .25s}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.kit-modal{width:min(640px,100%);background:var(--paper);border:var(--b);border-radius:var(--r);box-shadow:var(--sh-8);padding:28px 30px;position:relative;animation:popIn .4s cubic-bezier(.2,1.3,.4,1)}
.kit-modal .km-close{position:absolute;top:16px;right:16px;width:36px;height:36px;border-radius:50%;border:var(--b);background:#fff;font-size:16px;cursor:pointer;box-shadow:var(--sh-2);transition:transform .2s}
.kit-modal .km-close:hover{transform:rotate(90deg) scale(1.05)}
.km-head{display:flex;align-items:center;gap:14px;margin-bottom:8px;padding-right:42px}
.km-head .km-emoji{width:56px;height:56px;border-radius:16px;font-size:30px;flex-shrink:0;display:flex;align-items:center;justify-content:center;border:var(--b);background:var(--hl)}
.km-head h2{font-size:21px;font-weight:800;line-height:1.3}
.km-sec{margin-top:18px}
.km-sec h4{font-size:14.5px;font-weight:800;color:var(--ink);margin-bottom:8px;display:flex;align-items:center;gap:7px}
.km-sec p{font-size:14px;color:var(--ink-soft);line-height:1.85;font-weight:500}
.km-prompt{background:#fffdf0;color:var(--ink);border:2.5px dashed var(--ink);border-radius:var(--r-s);padding:16px 18px;font-size:14px;line-height:1.95;font-weight:600;white-space:pre-wrap;word-break:break-word}
.km-prompt .km-ph{color:var(--coral);font-weight:800;background:#ffe9b8;padding:0 5px;border-radius:5px}
.km-copy{margin-top:12px;width:100%;justify-content:center}
.km-steps{counter-reset:kstep;list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}
.km-steps li{counter-increment:kstep;display:flex;gap:12px;align-items:flex-start;background:#fffdf6;border:2.5px solid var(--ink);border-radius:var(--r-s);padding:11px 15px;font-size:13.5px;font-weight:600;color:var(--ink-soft);line-height:1.7}
.km-steps li::before{content:counter(kstep);flex:0 0 24px;height:24px;border-radius:50%;background:var(--teal);color:#fff;font-weight:800;font-size:13px;display:flex;align-items:center;justify-content:center;border:2px solid var(--ink)}
.km-tip{margin-top:16px;background:#fff8e1;border:2.5px dashed var(--amber);border-radius:var(--r-s);padding:12px 16px;font-size:13.5px;line-height:1.8;color:#7a5b13;font-weight:600}
.km-tool-link{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:800;color:#fff;background:var(--ink);padding:8px 16px;border-radius:999px;transition:background .2s;margin-top:4px}
.km-tool-link:hover{background:var(--teal)}

/* ---------- 键盘聚焦高亮（用网站紫色描边替代浏览器默认蓝框，既看得清又协调） ---------- */
.card:focus-visible,.node-row:focus-visible,.tab:focus-visible,.match-item:focus-visible,.task-card:focus-visible{outline:3px solid var(--violet);outline-offset:3px}

/* ---------- 响应式 ---------- */
@media(max-width:760px){
  .nav{padding:10px 14px;gap:10px;flex-wrap:wrap}
  /* 手机端导航不再隐藏：换成可横向滑动的一行 */
  .nav-links{order:3;width:100%;display:flex;gap:8px;overflow-x:auto;padding:2px 0 4px;scrollbar-width:none;-webkit-overflow-scrolling:touch}
  .nav-links::-webkit-scrollbar{display:none}
  .nav-links a{flex:0 0 auto;padding:7px 12px;font-size:13px}
  .xp-pill{margin-left:auto}
  .match-area{grid-template-columns:1fr}
  .lesson-card{padding:20px 18px}
  .t-sec{padding:20px 18px}
  .me-panel{padding:18px}
  .node-info{max-width:none}
  .kit-modal{padding:22px 18px}
  .kit-overlay{padding:24px 12px}
}