/* 洪博教学工坊 · 全站样式（Neo-Brutalism） */
:root{
  --yellow:#ffe17c; --char:#171e19; --sage:#b7c6c2;
  --white:#fff; --black:#000; --gray:#f4f4f5;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Satoshi','PingFang SC','Microsoft YaHei',sans-serif;
  font-weight:500;color:#000;background:#fff;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,.display{font-family:'Cabinet Grotesk','PingFang SC',sans-serif;font-weight:800;letter-spacing:-.03em;line-height:1.05}
.dots{background-image:radial-gradient(rgba(23,30,25,.10) 1.5px,transparent 1.6px);background-size:32px 32px}

.btn{
  display:inline-flex;align-items:center;gap:.5rem;justify-content:center;
  font-family:'Satoshi',sans-serif;font-weight:700;font-size:1.05rem;
  padding:1rem 1.9rem;border:2px solid #000;border-radius:.6rem;
  text-decoration:none;cursor:pointer;transition:transform .2s cubic-bezier(.175,.885,.32,1.275),box-shadow .2s cubic-bezier(.175,.885,.32,1.275);
}
.btn:hover{transform:translate(4px,4px)}
.btn-black{background:#000;color:#fff;box-shadow:8px 8px 0 0 #000}
.btn-black:hover{box-shadow:4px 4px 0 0 #000}
.btn-white{background:#fff;color:#000;box-shadow:4px 4px 0 0 #000}
.btn-white:hover{box-shadow:0 0 0 0 #000}

/* ---------- 导航 ---------- */
header{
  position:fixed;inset:0 0 auto 0;height:80px;z-index:50;
  background:var(--yellow);border-bottom:2px solid #000;
  display:flex;align-items:center;justify-content:space-between;padding:0 2.2rem;
}
.logo{display:flex;align-items:center;gap:.7rem;text-decoration:none;color:#000;font-family:'Cabinet Grotesk';font-weight:800;font-size:1.35rem;letter-spacing:-.02em}
.logo .mark{width:42px;height:42px;background:#000;display:grid;place-items:center;box-shadow:3px 3px 0 0 rgba(0,0,0,.25)}
.logo .mark svg{width:24px;height:24px}
.logo .mark img{width:42px;height:42px;object-fit:cover;display:block}
nav{display:flex;gap:1.9rem;align-items:center}
nav a{color:#000;text-decoration:none;font-weight:700;font-size:1rem;position:relative}
nav a::after{content:'';position:absolute;left:0;bottom:-5px;width:100%;height:2px;background:#000;transform:scaleX(0);transform-origin:left;transition:transform .2s}
nav a:hover::after,nav a.on::after{transform:scaleX(1)}
.header-cta{padding:.7rem 1.4rem;font-size:.95rem}
.header-slogan{font-weight:700;font-size:.92rem;letter-spacing:.02em;opacity:.7;white-space:nowrap}

main{display:block}
.section{padding:6rem 2.2rem}

/* ---------- 首页 Hero ---------- */
.hero{background-color:var(--yellow);border-bottom:2px solid #000;padding-top:calc(6rem + 80px);min-height:100vh;display:flex;align-items:center}
.hero .wrap{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:1.05fr .95fr;gap:3.5rem;align-items:center;width:100%}
.badge{display:inline-flex;align-items:center;gap:.5rem;background:#fff;border:2px solid #000;border-radius:999px;padding:.5rem 1.1rem;font-size:.9rem;font-weight:700;box-shadow:3px 3px 0 0 #000}
.badge .dot{width:9px;height:9px;background:var(--char);border-radius:50%}
.hero h1{font-size:clamp(2.9rem,7vw,5.9rem);margin:1.6rem 0 1.4rem;text-transform:uppercase}
.stroke{color:transparent;-webkit-text-stroke:2px #000}
.hero p.lead{font-size:1.18rem;max-width:34rem;line-height:1.7}
.hero .ctas{display:flex;gap:1.3rem;margin-top:2.4rem;flex-wrap:wrap}
.hero .meta{margin-top:2.2rem;display:flex;gap:2rem;flex-wrap:wrap}
.hero .meta div{font-size:.92rem;font-weight:700}
.hero .meta small{display:block;color:#000;opacity:.65;font-weight:500;margin-top:.2rem}

.mock{background:#fff;border:2px solid #000;border-radius:1rem;box-shadow:12px 12px 0 0 #000;overflow:hidden}
.mock .bar{background:#000;display:flex;gap:.45rem;padding:.7rem .9rem;align-items:center}
.mock .bar i{width:12px;height:12px;border-radius:50%;display:block}
.mock .bar i:nth-child(1){background:#ff5f57}.mock .bar i:nth-child(2){background:#febc2e}.mock .bar i:nth-child(3){background:#28c840}
.mock .body{padding:1rem 1rem 1.1rem}
.mock .title{display:flex;justify-content:space-between;align-items:center;margin-bottom:.8rem;font-weight:700}
.mock .title .chip{background:var(--sage);border:2px solid #000;border-radius:999px;padding:.2rem .7rem;font-size:.78rem}
.mock canvas{width:100%;height:auto;border:2px solid #000;border-radius:.6rem;background:#fff}
.mock .leg{display:flex;gap:.6rem;margin-top:.8rem}
.mock .leg div{flex:1;border:2px solid #000;border-radius:.6rem;padding:.6rem .7rem;font-size:.8rem;font-weight:700}
.mock .leg .a{background:var(--sage)}
.mock .leg .b{background:var(--char);color:#fff}

/* ---------- marquee ---------- */
.marquee{background:var(--char);border-bottom:2px solid #000;overflow:hidden}
.mq{display:flex;width:max-content;animation:mq 24s linear infinite}
.mq span{font-family:'Cabinet Grotesk';font-weight:700;font-size:2.1rem;color:var(--sage);opacity:.5;white-space:nowrap;padding:1.2rem 2.4rem;letter-spacing:.01em}
.mq span em{font-style:normal;color:var(--yellow);opacity:.9}
@keyframes mq{to{transform:translateX(-50%)}}

/* ---------- 通用区块 ---------- */
.problem{background:#fff}
.problem .wrap,.features .wrap,.how .wrap,.users .wrap,.tst .wrap{max-width:1120px;margin:0 auto}
.sec-head{margin-bottom:3rem}
.sec-head .eyebrow{display:inline-block;font-weight:700;letter-spacing:.14em;font-size:.85rem;text-transform:uppercase;border:2px solid #000;border-radius:999px;padding:.35rem .9rem;margin-bottom:1.2rem;background:var(--yellow)}
.sec-head h2{font-size:clamp(2rem,4.5vw,3.2rem)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:2rem}
.card{border-radius:1.4rem;padding:2rem 2.1rem}
.card h3{font-size:1.7rem;margin-bottom:1.2rem}
.card ul{list-style:none}
.card li{display:flex;gap:.8rem;align-items:flex-start;padding:.55rem 0;font-size:1.05rem;line-height:1.5}
.card li b{font-weight:700}
.bad{background:var(--gray);border:2px dashed #aaa;opacity:.9}
.bad li::before{content:'✕';color:#e5484d;font-weight:700;line-height:1.5}
.good{background:var(--yellow);border:2px solid #000;box-shadow:8px 8px 0 0 #000}
.good li::before{content:'✓';color:#1d9d57;font-weight:700;line-height:1.5}

.features{background-color:var(--yellow);border-top:2px solid #000;border-bottom:2px solid #000}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.6rem}
.fcard{background:#fff;border:2px solid #000;border-radius:.8rem;box-shadow:4px 4px 0 0 #000;padding:1.7rem;transition:transform .18s cubic-bezier(.175,.885,.32,1.275),box-shadow .18s}
.fcard:hover{transform:translate(4px,4px);box-shadow:0 0 0 0 #000}
.fcard .ico{width:52px;height:52px;background:var(--sage);border:2px solid #000;border-radius:.5rem;display:grid;place-items:center;margin-bottom:1.1rem;transition:background .18s}
.fcard .ico svg{width:26px;height:26px}
.fcard:hover .ico{background:var(--yellow)}
.fcard h3{font-size:1.45rem;margin-bottom:.5rem}
.fcard p{font-size:.98rem;line-height:1.6;opacity:.85}

.how{background:var(--char);color:#fff;border-bottom:2px solid #000}
.how .sec-head .eyebrow{background:transparent;color:#fff;border-color:#fff}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:1.8rem;position:relative}
.steps::before{content:'';position:absolute;top:56px;left:12%;right:12%;height:3px;background:#272727}
.step{text-align:center;position:relative}
.step .num{width:76px;height:76px;margin:0 auto 1.2rem;border-radius:50%;display:grid;place-items:center;font-family:'Cabinet Grotesk';font-weight:800;font-size:1.9rem;position:relative;z-index:1;background:var(--char)}
.step:nth-child(1) .num{border:4px solid var(--sage)}
.step:nth-child(2) .num{border:4px solid var(--yellow)}
.step:nth-child(3) .num{border:4px solid #fff}
.step h3{font-size:1.5rem;margin-bottom:.6rem}
.step p{font-size:.98rem;opacity:.72;line-height:1.6;max-width:18rem;margin:0 auto}

.users{background:#fff}
.bento{display:grid;grid-template-columns:1fr 1fr 1fr;gap:1.6rem;align-items:stretch}
.bcard{display:flex;flex-direction:column;border-radius:1.4rem;padding:1.9rem;border:2px solid #000}
.bcard .pill{align-self:flex-start;background:#fff;border:2px solid #000;border-radius:999px;padding:.3rem .9rem;font-weight:700;font-size:.85rem;margin-bottom:1.2rem}
.bcard h3{font-size:1.6rem;margin-bottom:.7rem}
.bcard p{font-size:1rem;line-height:1.6;opacity:.85;flex:1}
.b-sage{background:var(--sage);box-shadow:8px 8px 0 0 #000}
.b-yellow{background:var(--yellow);box-shadow:8px 8px 0 0 #000}
.b-dark{background:#272727;color:#fff;box-shadow:8px 8px 0 0 #000}
.b-dark .pill{background:#272727;color:#fff;border-color:#fff}

.tst{background:var(--sage)}
.tst .sec-head .eyebrow{background:#fff}
.tgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.6rem}
.tcard{background:#fff;border:2px solid #000;padding:1.8rem;border-top-right-radius:1.4rem;border-bottom-left-radius:1.4rem;border-top-left-radius:2px;border-bottom-right-radius:2px;box-shadow:5px 5px 0 0 rgba(23,30,25,.35)}
.stars{color:#ffbc2e;font-size:1.2rem;letter-spacing:.15em;margin-bottom:1rem}
.tcard blockquote{font-size:1.05rem;line-height:1.7;margin-bottom:1.3rem}
.tcard cite{font-style:normal;font-weight:700;font-size:.9rem;display:block}
.tcard cite small{display:block;font-weight:500;opacity:.6;margin-top:.15rem}

.cta{background-color:var(--yellow);text-align:center;padding:7rem 2.2rem;border-bottom:2px solid #000}
.cta h2{font-size:clamp(2.4rem,6vw,4.4rem);margin-bottom:1.2rem}
.cta p{font-size:1.1rem;margin-bottom:2.2rem;opacity:.85}

/* ---------- Footer ---------- */
footer{background:var(--char);color:#fff;padding:4.5rem 2.2rem 0}
.foot{max-width:1120px;margin:0 auto;display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:2.4rem;padding-bottom:3rem}
.foot h4{font-size:.85rem;letter-spacing:.12em;text-transform:uppercase;color:var(--sage);margin-bottom:1.1rem}
.foot ul{list-style:none}
.foot li{margin:.5rem 0}
.foot a{color:#fff;text-decoration:none;font-size:.95rem;opacity:.85}
.foot a:hover{opacity:1;color:var(--yellow)}
.foot .brand p{margin-top:1rem;font-size:.95rem;opacity:.7;line-height:1.7;max-width:20rem}
.social{display:flex;gap:.7rem}
.social a{width:44px;height:44px;background:#272727;border:2px solid #b7c6c2;display:grid;place-items:center;font-weight:700;font-size:.95rem;border-radius:.4rem;opacity:1}
.social a:hover{background:var(--yellow);border-color:#000;color:#000}
.foot-bottom{border-top:2px solid #272727;padding:1.4rem 0;max-width:1120px;margin:0 auto;display:flex;justify-content:space-between;font-size:.85rem;opacity:.55;flex-wrap:wrap;gap:.5rem}

/* ---------- 教具页 ---------- */
.tools-hero{background-color:var(--yellow);border-bottom:2px solid #000;padding:calc(7rem + 80px) 2.2rem 4.5rem}
.tools-hero .wrap{max-width:1120px;margin:0 auto}
.tools-hero h1{font-size:clamp(2.6rem,6vw,4.6rem);margin-bottom:1rem}
.tools-hero p{font-size:1.1rem;max-width:36rem;line-height:1.7;opacity:.85}
.back-link{display:inline-block;background:#fff;border:2px solid #000;border-radius:999px;padding:.55rem 1.3rem;font-weight:700;font-size:.95rem;color:#000;text-decoration:none;box-shadow:3px 3px 0 0 #000;margin-bottom:1.6rem;transition:transform .18s,box-shadow .18s}
.back-link:hover{transform:translate(2px,2px);box-shadow:1px 1px 0 0 #000}
.tools-hero:has(+ .grade-body){border-bottom:none;padding-top:calc(2rem + 80px);padding-bottom:2rem}
.grade-body{background-color:var(--yellow);padding-bottom:4rem}

.searchbox{position:relative;max-width:34rem;margin:1.8rem 0 0}
.searchbox input{
  width:100%;padding:1.1rem 1.3rem 1.1rem 3.1rem;font-size:1.05rem;font-family:'Satoshi',sans-serif;
  border:2px solid #000;border-radius:.7rem;background:#fff;box-shadow:5px 5px 0 0 #000;outline:none;
}
.searchbox input:focus{box-shadow:3px 3px 0 0 #000;transform:translate(2px,2px)}
.searchbox .mag{position:absolute;left:1rem;top:50%;transform:translateY(-50%);width:22px;height:22px}
.searchbox .results{position:absolute;top:calc(100% + 8px);left:0;right:0;background:#fff;border:2px solid #000;border-radius:.7rem;box-shadow:6px 6px 0 0 #000;overflow:hidden;z-index:30;display:none}
.searchbox .results.open{display:block}
.sr{padding:1rem 1.2rem;border-bottom:2px solid #000;display:flex;align-items:center;gap:.9rem;text-decoration:none;color:#000;background:#fff}
.sr:last-child{border-bottom:none}
.sr:hover{background:var(--yellow)}
.sr b{font-family:'Cabinet Grotesk';font-size:1.05rem}
.sr .gd{margin-left:auto;font-size:.72rem;font-weight:700;border:2px solid #000;border-radius:999px;padding:.15rem .6rem;background:var(--sage);white-space:nowrap}
.sr .tp{font-size:.8rem;opacity:.6}
.sr.empty{cursor:default}.sr.empty:hover{background:#fff}
.sr .hit{background:var(--yellow);padding:0 2px}

.tools-hero:has(.grade-grid){padding-bottom:1rem;border-bottom:none}
.tools-hero .grade-grid{padding:2.5rem 0 5rem}
.grade-grid{max-width:1120px;margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:1.6rem;padding:0 2.2rem 5rem}
.gcard{display:flex;flex-direction:column;gap:.7rem;padding:2rem;border-radius:1.2rem;border:2px solid #000;text-decoration:none;color:#000;box-shadow:8px 8px 0 0 #000;transition:transform .18s cubic-bezier(.175,.885,.32,1.275),box-shadow .18s}
.gcard:hover{transform:translate(4px,4px);box-shadow:4px 4px 0 0 #000}
.gcard h2{font-size:2rem}
.gcard .note{font-size:.98rem;opacity:.75;line-height:1.6;flex:1}
.gcard .cnt{display:inline-flex;align-items:center;gap:.4rem;font-weight:700;font-size:.85rem}
.gcard .cnt .pill{background:#fff;border:2px solid #000;border-radius:999px;padding:.2rem .7rem;font-size:.78rem}
.g-gaozhong{background:var(--white)}
.g-chuzhong{background:var(--sage)}
.g-xiaoxue{background:var(--gray);border-style:dashed;opacity:.8}

/* 学段分类页 */
.topic{padding:3.5rem 2.2rem 0;max-width:1120px;margin:0 auto}
.topic h2{font-size:clamp(1.6rem,3.2vw,2.2rem);margin-bottom:.9rem;display:flex;align-items:center;gap:.8rem}
.topic h2::before{content:'';width:14px;height:14px;background:var(--char);display:inline-block}
.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem;padding-bottom:1.8rem}
.tcard2{display:flex;flex-direction:column;gap:.5rem;background:#fff;border:2px solid #000;border-radius:.8rem;box-shadow:4px 4px 0 0 #000;padding:1.2rem;text-decoration:none;color:#000;transition:transform .18s cubic-bezier(.175,.885,.32,1.275),box-shadow .18s}
.tcard2:hover{transform:translate(4px,4px);box-shadow:0 0 0 0 #000}
.tcard2 .tp{font-size:.75rem;font-weight:700;border:2px solid #000;border-radius:999px;padding:.15rem .6rem;background:var(--sage);align-self:flex-start}
.tcard2 h3{font-size:1.3rem}
.tcard2 p{font-size:.92rem;line-height:1.6;opacity:.75;flex:1}
.tcard2 .go{font-weight:700;font-size:.9rem}
.tcard2 .go b{color:#000}
.tcard2:hover .go{background:var(--yellow)}

.empty-zone{max-width:1120px;margin:0 auto;padding:4rem 2.2rem 6rem}
.empty-box{border:2px dashed #aaa;border-radius:1.4rem;background:var(--gray);opacity:.85;padding:4rem 2rem;text-align:center}
.empty-box h2{font-size:2rem;margin-bottom:1rem}
.empty-box p{font-size:1.02rem;line-height:1.7;opacity:.75}

/* ---------- 响应式 ---------- */
@media(max-width:1100px){
  .grid3,.tgrid,.bento,.steps,.grade-grid,.tool-grid{grid-template-columns:repeat(2,1fr)}
  .steps::before{display:none}
  .hero .wrap{padding:0 2.2rem}
}
@media(max-width:980px){
  nav a{display:none}
  .hero .wrap{grid-template-columns:1fr;gap:3rem}
  .hero{padding-top:calc(5rem + 80px)}
  .grid3,.tgrid,.bento,.steps,.grade-grid,.tool-grid{grid-template-columns:1fr}
  .split{grid-template-columns:1fr}
  .foot{grid-template-columns:1fr 1fr}
}
@media(max-width:560px){
  .section{padding:4rem 1.5rem}
  .hero .wrap{padding:0 1.5rem}
  header{padding:0 1.2rem}
  .foot{grid-template-columns:1fr}
  .tools-hero{padding-top:calc(5rem + 80px)}
}