/* ============================================================
   看不见的小小世界 · 样式
   主题：紫色字体 + 黑白真实照片（呼应"配图黑色"）
   ============================================================ */
:root{
  --purple:#6a1b9a;
  --purple-deep:#4a148c;
  --purple-soft:#9c4dcc;
  --purple-bg:#f5edfb;
  --paper:#fbf7ff;
  --ink:#111111;
  --line:#e6d4f6;
  --danger:#c1121f;
  --good:#0e9488;
  --mark:#fff3a8;          /* 高亮底色 */
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:var(--purple-bg);
  color:var(--purple);
  line-height:1.85;
  font-size:17px;
}
h1,h2,h3,h4,p,li,a,span,th,td,figcaption,summary,strong{color:var(--purple);}
strong{color:var(--purple-deep);}
img{max-width:100%;display:block;}

/* 拼音 */
ruby{ruby-align:center;}
rt{font-size:.55em;color:var(--purple-soft);letter-spacing:1px;font-weight:600;}
body.pinyin-off rt{visibility:hidden;}

/* 高亮：如何侵入身体 */
mark{background:var(--mark);color:var(--purple-deep);font-weight:700;padding:0 3px;border-radius:4px;}

/* ===== 顶栏 ===== */
.topbar{
  position:sticky;top:0;z-index:60;background:#fff;
  box-shadow:0 2px 12px rgba(106,27,154,.16);
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  padding:10px 16px;
}
.logo{font-weight:800;font-size:19px;text-decoration:none;white-space:nowrap;}
.topbar .nav{display:flex;gap:6px;flex-wrap:wrap;flex:1;}
.topbar .nav a{
  text-decoration:none;font-size:14.5px;font-weight:700;
  padding:5px 12px;border-radius:20px;background:var(--purple-bg);border:1.5px solid var(--line);
}
.topbar .nav a:hover{background:var(--purple-soft);color:#fff;}
.pinyin-btn{
  font-family:inherit;font-weight:700;font-size:14px;color:var(--purple);
  background:var(--purple-bg);border:2px solid var(--purple-soft);border-radius:20px;
  padding:5px 12px;cursor:pointer;display:flex;align-items:center;gap:6px;
}
.pinyin-btn .dot{width:9px;height:9px;border-radius:50%;background:var(--good);display:inline-block;}
body.pinyin-off .pinyin-btn .dot{background:#c0b0d0;}

/* ===== 主视觉 ===== */
.hero{
  background:linear-gradient(135deg,var(--purple-deep),var(--purple-soft));
  color:#fff;text-align:center;padding:40px 20px 34px;position:relative;overflow:hidden;
}
.hero h1{color:#fff;font-size:34px;margin:6px 0 10px;letter-spacing:2px;}
.hero .kicker{color:#f0e3ff;font-size:15px;letter-spacing:3px;margin:0;}
.hero .sub{color:#f3e9ff;max-width:620px;margin:0 auto 18px;font-size:16px;}
.hero .cta{
  display:inline-block;background:#fff;color:var(--purple-deep);font-weight:800;
  text-decoration:none;padding:11px 26px;border-radius:30px;box-shadow:0 6px 18px rgba(0,0,0,.18);
}
.hero .floaties{position:absolute;inset:0;pointer-events:none;font-size:26px;opacity:.25;}
.hero .floaties span{position:absolute;}
.hero .floaties span:nth-child(1){left:8%;top:20%;}
.hero .floaties span:nth-child(2){left:85%;top:18%;}
.hero .floaties span:nth-child(3){left:18%;top:68%;}
.hero .floaties span:nth-child(4){left:78%;top:64%;}
.hero .floaties span:nth-child(5){left:50%;top:12%;}
.hero .floaties span:nth-child(6){left:40%;top:74%;}

/* ===== 区块 ===== */
.section{max-width:1040px;margin:0 auto;padding:30px 18px;}
.section-title{font-size:25px;margin:0 0 4px;text-align:center;}
.section-sub{text-align:center;color:var(--purple-soft);margin:0 auto 18px;max-width:680px;font-size:15.5px;}
.section-alt{background:#fff;border-radius:24px;margin:18px auto;}

/* 分类介绍块 */
.cat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;}
.cat-box{background:var(--paper);border:2px solid var(--line);border-radius:18px;padding:16px 18px;}
.cat-box h3{margin:0 0 6px;font-size:20px;display:flex;align-items:center;gap:8px;}
.cat-box .traits{margin:8px 0 0;padding-left:18px;font-size:14px;}
.cat-box .traits li{margin:3px 0;}

/* ===== 工具栏（搜索 + 分类筛选） ===== */
.tools{display:flex;flex-direction:column;gap:12px;align-items:center;margin-bottom:16px;}
.search-wrap{position:relative;width:min(420px,90%);}
.search-wrap input{
  width:100%;font-family:inherit;font-size:16px;color:var(--purple);
  padding:11px 16px 11px 40px;border-radius:30px;border:2px solid var(--purple-soft);
  background:#fff;outline:none;
}
.search-wrap .ico{position:absolute;left:14px;top:50%;transform:translateY(-50%);}
.chips{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;}
.chip{
  font-family:inherit;font-size:14.5px;font-weight:700;color:var(--purple);
  background:#fff;border:2px solid var(--line);border-radius:24px;padding:7px 15px;cursor:pointer;
  transition:all .15s;
}
.chip:hover{border-color:var(--purple-soft);}
.chip.active{background:var(--purple);color:#fff;border-color:var(--purple);}
.chip.danger.active{background:var(--danger);border-color:var(--danger);}
.result-meta{text-align:center;color:var(--purple-soft);font-size:14px;margin-bottom:12px;}

/* ===== 卡片网格 ===== */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:16px;}
.card{
  background:#fff;border:2px solid var(--line);border-radius:18px;overflow:hidden;cursor:pointer;
  display:flex;flex-direction:column;transition:transform .15s,box-shadow .15s;position:relative;
}
.card:hover{transform:translateY(-4px);box-shadow:0 10px 24px rgba(106,27,154,.18);}
.card .thumb{position:relative;aspect-ratio:4/3;background:#efe7f6;}
.card .thumb img{width:100%;height:100%;object-fit:cover;filter:grayscale(100%) contrast(1.06);}
.card .thumb .emoji{width:100%;height:100%;display:flex;align-items:center;justify-content:center;font-size:54px;}
.card .cat-tag{
  position:absolute;left:8px;top:8px;font-size:12px;font-weight:700;color:#fff;
  padding:2px 9px;border-radius:14px;background:var(--purple);
}
.card .deadly-tag{
  position:absolute;right:8px;top:8px;font-size:11.5px;font-weight:800;color:#fff;
  padding:2px 8px;border-radius:14px;background:var(--danger);
}
.card .good-tag{
  position:absolute;right:8px;top:8px;font-size:11.5px;font-weight:800;color:#fff;
  padding:2px 8px;border-radius:14px;background:var(--good);
}
.card .body{padding:10px 12px 14px;flex:1;display:flex;flex-direction:column;}
.card .name{font-weight:800;font-size:17px;margin:0;line-height:1.4;}
.card .sci{font-size:11.5px;color:var(--purple-soft);font-style:italic;margin:1px 0 6px;}
.card .one{font-size:13.5px;line-height:1.6;margin:0;color:var(--purple);}
.empty-hint{text-align:center;color:var(--purple-soft);padding:30px;}

/* ===== 详情弹窗 ===== */
.modal{position:fixed;inset:0;z-index:100;background:rgba(40,10,60,.55);
  display:flex;align-items:flex-start;justify-content:center;padding:20px;overflow:auto;}
.modal[hidden]{display:none;}
.modal-card{
  background:var(--paper);border-radius:22px;max-width:680px;width:100%;margin:24px auto;
  position:relative;box-shadow:0 20px 60px rgba(0,0,0,.4);animation:pop .25s ease;
}
@keyframes pop{from{transform:translateY(16px) scale(.98);opacity:0;}to{transform:none;opacity:1;}}
.modal-close{position:absolute;right:12px;top:12px;z-index:2;border:none;background:#fff;
  width:38px;height:38px;border-radius:50%;font-size:18px;cursor:pointer;color:var(--purple);
  box-shadow:0 2px 8px rgba(0,0,0,.2);}
.m-head{display:flex;gap:16px;padding:22px 22px 8px;align-items:flex-start;}
.m-photo{flex:0 0 150px;width:150px;}
.m-photo img{width:150px;height:150px;object-fit:cover;border-radius:14px;border:3px solid var(--ink);
  filter:grayscale(100%) contrast(1.06);cursor:zoom-in;background:#fff;}
.m-photo .emoji{width:150px;height:150px;display:flex;align-items:center;justify-content:center;
  font-size:72px;border:3px solid var(--ink);border-radius:14px;}
.m-photo .credit{font-size:11px;color:var(--purple-soft);text-align:center;margin-top:4px;}
.m-title{flex:1;min-width:0;}
.m-title h3{font-size:24px;margin:2px 0 2px;}
.m-title .sci{font-style:italic;color:var(--purple-soft);font-size:13px;margin:0 0 8px;}
.m-badges{display:flex;gap:6px;flex-wrap:wrap;}
.m-badge{font-size:12px;font-weight:800;color:#fff;padding:3px 10px;border-radius:16px;background:var(--purple);}
.m-badge.danger{background:var(--danger);}
.m-badge.good{background:var(--good);}
.m-one{padding:0 22px;font-size:16px;}

/* 危险提示条 */
.danger-note{
  margin:10px 22px;padding:12px 16px;border-radius:12px;background:#fde7e9;
  border-left:6px solid var(--danger);font-size:15px;
}
.danger-note,.danger-note *{color:#8a0e18;}
.danger-note b{color:var(--danger);}

/* 三步：获取 / 侵入(高亮) / 症状 */
.steps{padding:6px 22px 4px;}
.step{display:flex;gap:12px;padding:12px 0;border-top:1px dashed var(--line);}
.step:first-child{border-top:none;}
.step .k{font-size:26px;flex:0 0 auto;line-height:1.2;}
.step .c h4{margin:0 0 2px;font-size:16px;}
.step .c p{margin:0;font-size:15px;}
/* 侵入途径整块高亮 */
.step.invade{background:#fffbe6;border-radius:14px;border:2px solid #ffe680;border-top:2px solid #ffe680;
  padding:12px 14px;margin:8px 0;}
.step.invade .c h4{color:#9a6b00;}
.step.invade .c h4 .tip{font-size:12px;font-weight:600;color:#b08400;background:#fff3a8;
  padding:1px 8px;border-radius:12px;margin-left:6px;}

/* 得了怎么办（绿色护理块） */
.step.treat{background:#e7f7f2;border-radius:14px;border:2px solid #9fe3d2;padding:12px 14px;margin:8px 0;}
.step.treat .c h4{color:var(--good);}
.step.treat,.step.treat *{}

.m-facts{padding:8px 22px 22px;}
.m-facts .ft-title{font-weight:800;margin:8px 0 6px;}
.m-facts ul{margin:0;padding-left:20px;}
.m-facts li{margin:5px 0;font-size:14.5px;}

/* ===== 防护小贴士 ===== */
.tips-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;}
.tip{background:var(--paper);border:2px solid var(--line);border-radius:16px;padding:14px 16px;}
.tip .em{font-size:30px;}
.tip h4{margin:6px 0 4px;font-size:17px;}
.tip p{margin:0;font-size:14px;}

/* ===== 名词小词典 ===== */
.gloss-row{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;}
.gloss{background:var(--paper);border:2px solid var(--line);border-radius:16px;padding:14px 16px;}
.gloss h4{margin:0 0 4px;font-size:18px;display:flex;align-items:baseline;gap:8px;}
.gloss h4 .py{font-size:12px;color:var(--purple-soft);font-weight:600;}
.gloss p{margin:0;font-size:14px;}

/* ===== 闯关小测验 ===== */
.quiz-box{max-width:560px;margin:0 auto;}
.quiz-card,.quiz-done{background:var(--paper);border:2px solid var(--line);border-radius:20px;
  padding:22px;box-shadow:0 4px 14px rgba(106,27,154,.08);text-align:center;}
.quiz-progress{font-size:13px;color:var(--purple-soft);margin-bottom:8px;}
.quiz-q{font-size:20px;margin:0 0 16px;}
.quiz-opts{display:flex;flex-direction:column;gap:10px;}
.quiz-opt{font-family:inherit;font-size:16px;font-weight:700;color:var(--purple);background:#fff;
  border:2px solid var(--purple-soft);border-radius:14px;padding:12px;cursor:pointer;transition:all .15s;}
.quiz-opt:hover:not(:disabled){background:var(--purple-soft);color:#fff;}
.quiz-opt:disabled{cursor:default;}
.quiz-opt.correct{background:var(--good);border-color:var(--good);color:#fff;}
.quiz-opt.wrong{background:var(--danger);border-color:var(--danger);color:#fff;}
.quiz-opt.dim{opacity:.5;}
.quiz-tip{margin:14px 0 4px;font-size:15px;background:#efe1fa;border-radius:12px;padding:10px 14px;text-align:left;}
.quiz-btn{margin-top:14px;font-family:inherit;font-size:16px;font-weight:800;color:#fff;
  background:var(--purple);border:none;border-radius:24px;padding:10px 24px;cursor:pointer;}
.quiz-btn:hover{background:var(--purple-deep);}
.quiz-done .big{font-size:60px;}
.quiz-done h3{font-size:23px;margin:6px 0;}

/* ===== 灯箱 ===== */
.lightbox{position:fixed;inset:0;z-index:120;background:rgba(0,0,0,.88);
  display:flex;align-items:center;justify-content:center;flex-direction:column;padding:20px;}
.lightbox[hidden]{display:none;}
.lightbox img{max-width:92vw;max-height:80vh;border-radius:10px;filter:grayscale(100%);}
.lightbox figcaption{color:#eee;margin-top:12px;font-size:14px;text-align:center;}
.lightbox .lb-close{position:absolute;right:18px;top:18px;background:#fff;border:none;
  width:42px;height:42px;border-radius:50%;font-size:20px;cursor:pointer;color:#222;}

/* ===== 页脚 ===== */
.footer{text-align:center;padding:26px 18px;font-size:13px;color:var(--purple-soft);}
.footer .tiny{font-size:12px;opacity:.9;}

@media(max-width:560px){
  .hero h1{font-size:27px;}
  .m-head{flex-direction:column;align-items:center;text-align:center;}
  .m-photo{flex-basis:auto;}
  .card-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));}
}