/* ==========================================================
   AI科技网 aikjw.com  全局样式
   设计基调：科技蓝紫渐变 + 浅色阅读底 + 深色模式
   ========================================================== */

:root{
  --brand:#2563eb;
  --brand-2:#7c3aed;
  --brand-3:#06b6d4;
  --grad:linear-gradient(135deg,#2563eb 0%,#7c3aed 100%);
  --grad-soft:linear-gradient(135deg,#eff6ff 0%,#f5f3ff 100%);

  --bg:#f5f7fb;
  --bg-card:#ffffff;
  --bg-elev:#ffffff;
  --line:#e6eaf2;
  --line-soft:#f0f3f8;

  --text:#0f172a;
  --text-2:#475569;
  --text-3:#94a3b8;

  --ok:#10b981;
  --warn:#f59e0b;
  --hot:#ef4444;

  --radius:14px;
  --radius-sm:10px;
  --shadow:0 1px 2px rgba(15,23,42,.04),0 8px 24px rgba(15,23,42,.06);
  --shadow-lg:0 12px 40px rgba(37,99,235,.14);
  --max:1200px;
  --nav-h:64px;
}

html[data-theme="dark"]{
  --bg:#0b1020;
  --bg-card:#131a2e;
  --bg-elev:#182136;
  --line:#232d47;
  --line-soft:#1c2540;
  --text:#e8edf7;
  --text-2:#a3b0c7;
  --text-3:#6b7a96;
  --grad-soft:linear-gradient(135deg,#141d38 0%,#1a1430 100%);
  --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.35);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:15px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  transition:background .25s,color .25s;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,textarea,select{font-family:inherit;font-size:inherit;outline:none}
ul,ol{list-style:none}
::selection{background:rgba(37,99,235,.18)}

/* 滚动条 */
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-thumb{background:var(--line);border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:var(--text-3)}

.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.row{display:flex;align-items:center}
.between{display:flex;align-items:center;justify-content:space-between}
.grow{flex:1}
.hide{display:none !important}

/* ================= 顶部导航 ================= */
.nav{
  position:sticky;top:0;z-index:100;height:var(--nav-h);
  background:rgba(255,255,255,.86);
  backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line);
}
html[data-theme="dark"] .nav{background:rgba(11,16,32,.86)}

.nav-in{max-width:var(--max);margin:0 auto;padding:0 20px;height:100%;display:flex;align-items:center;gap:26px}

.logo{display:flex;align-items:center;flex-shrink:0;text-decoration:none;line-height:0}
.logo-img{height:36px;width:auto;max-width:100%;display:block}
html[data-theme="dark"] .logo-img{filter:brightness(1.3) saturate(1.06)}
.logo-img-foot{height:46px}
.logo-text{font-size:18px;font-weight:800;letter-spacing:-.3px}
.logo-text span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.logo-domain{font-size:11px;color:var(--text-3);font-weight:600;letter-spacing:.5px;margin-top:-4px}

.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{
  padding:8px 13px;border-radius:9px;font-size:14.5px;font-weight:600;
  color:var(--text-2);transition:.18s;white-space:nowrap;
}
.nav-links a:hover{color:var(--brand);background:var(--line-soft)}
.nav-links a.on{color:var(--brand);background:rgba(37,99,235,.09)}

.nav-tools{display:flex;align-items:center;gap:10px;margin-left:auto}
.icon-btn{
  width:36px;height:36px;border-radius:10px;border:1px solid var(--line);
  background:var(--bg-card);display:flex;align-items:center;justify-content:center;
  cursor:pointer;color:var(--text-2);transition:.18s;flex-shrink:0;
}
.icon-btn:hover{color:var(--brand);border-color:var(--brand);transform:translateY(-1px)}
.icon-btn svg{width:18px;height:18px}

.nav-search{
  display:flex;align-items:center;gap:8px;height:36px;padding:0 12px;
  border:1px solid var(--line);border-radius:10px;background:var(--bg-card);
  width:210px;transition:.2s;
}
.nav-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(37,99,235,.1)}
.nav-search svg{width:16px;height:16px;color:var(--text-3);flex-shrink:0}
.nav-search input{border:0;background:transparent;flex:1;color:var(--text);font-size:14px;min-width:0}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  height:36px;padding:0 16px;border-radius:10px;font-size:14px;font-weight:600;
  cursor:pointer;border:0;transition:.18s;white-space:nowrap;
}
.btn-grad{background:var(--grad);color:#fff;box-shadow:0 4px 14px rgba(124,58,237,.28)}
.btn-grad:hover{transform:translateY(-1px);box-shadow:0 8px 22px rgba(124,58,237,.36)}
.btn-ghost{background:var(--bg-card);color:var(--text-2);border:1px solid var(--line)}
.btn-ghost:hover{color:var(--brand);border-color:var(--brand)}
.btn-sm{height:30px;padding:0 12px;font-size:13px;border-radius:8px}
.btn-block{width:100%}

.nav-toggle{display:none}

/* ================= 通用区块 ================= */
.section{padding:38px 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:20px;gap:16px}
.sec-title{display:flex;align-items:center;gap:10px;font-size:21px;font-weight:800;letter-spacing:-.4px}
.sec-title::before{content:"";width:4px;height:20px;border-radius:3px;background:var(--grad)}
.sec-sub{font-size:13.5px;color:var(--text-3);margin-top:2px}
.more{font-size:13.5px;color:var(--brand);font-weight:600;display:flex;align-items:center;gap:3px;white-space:nowrap}
.more:hover{text-decoration:underline}

.card{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);transition:.2s;
}
.card-hover:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:rgba(37,99,235,.3)}

.tag{
  display:inline-flex;align-items:center;height:22px;padding:0 8px;border-radius:6px;
  font-size:11.5px;font-weight:700;background:var(--line-soft);color:var(--text-2);
}
.tag-blue{background:rgba(37,99,235,.1);color:#2563eb}
.tag-purple{background:rgba(124,58,237,.1);color:#7c3aed}
.tag-cyan{background:rgba(6,182,212,.12);color:#0891b2}
.tag-green{background:rgba(16,185,129,.12);color:#059669}
.tag-orange{background:rgba(245,158,11,.14);color:#d97706}
.tag-red{background:rgba(239,68,68,.12);color:#dc2626}

.muted{color:var(--text-3)}
.dot{width:3px;height:3px;border-radius:50%;background:var(--text-3);display:inline-block;margin:0 6px;vertical-align:middle}

/* 难度分级徽标 */
.lv{display:inline-flex;align-items:center;gap:3px;height:20px;padding:0 7px;border-radius:5px;font-size:11px;font-weight:700}
.lv-1{background:rgba(16,185,129,.12);color:#059669}
.lv-2{background:rgba(245,158,11,.14);color:#d97706}
.lv-3{background:rgba(239,68,68,.12);color:#dc2626}

/* ================= 首页 HERO ================= */
.hero{
  position:relative;overflow:hidden;
  background:var(--grad-soft);border-bottom:1px solid var(--line);
}
.hero::before,.hero::after{
  content:"";position:absolute;border-radius:50%;filter:blur(60px);opacity:.35;pointer-events:none;
}
.hero::before{width:420px;height:420px;background:#60a5fa;top:-180px;right:-60px}
.hero::after{width:360px;height:360px;background:#c084fc;bottom:-200px;left:-80px}
.hero-in{position:relative;max-width:var(--max);margin:0 auto;padding:44px 20px 34px;display:grid;grid-template-columns:1.35fr .95fr;gap:34px;align-items:center}

.hero-badge{
  display:inline-flex;align-items:center;gap:7px;height:28px;padding:0 12px;border-radius:20px;
  background:rgba(37,99,235,.1);color:var(--brand);font-size:12.5px;font-weight:700;margin-bottom:16px;
  border:1px solid rgba(37,99,235,.18);
}
.pulse{width:6px;height:6px;border-radius:50%;background:var(--hot);animation:pulse 1.6s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.4;transform:scale(.8)}}

.hero h1{font-size:40px;line-height:1.22;font-weight:900;letter-spacing:-1px;margin-bottom:14px}
.hero h1 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{font-size:15.5px;color:var(--text-2);max-width:560px;margin-bottom:22px}

.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:22px}
.hero-actions .btn{height:42px;padding:0 22px;font-size:15px;border-radius:11px}

.hero-stats{display:flex;gap:26px;flex-wrap:wrap}
.hero-stat b{display:block;font-size:22px;font-weight:800;letter-spacing:-.5px;line-height:1.2}
.hero-stat span{font-size:12.5px;color:var(--text-3)}

/* 每日简报卡 */
.brief-card{
  background:var(--bg-card);border:1px solid var(--line);border-radius:18px;padding:20px;
  box-shadow:var(--shadow-lg);
}
.brief-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.brief-head h3{font-size:16px;font-weight:800;display:flex;align-items:center;gap:8px}
.brief-date{font-size:12px;color:var(--text-3)}
.brief-list{max-height:290px;overflow-y:auto;margin:0 -6px;padding:0 6px}
.brief-item{display:flex;gap:11px;padding:10px 0;border-bottom:1px dashed var(--line-soft)}
.brief-item:last-child{border-bottom:0}
.brief-no{
  flex-shrink:0;width:22px;height:22px;border-radius:7px;background:var(--grad);
  color:#fff;font-size:11.5px;font-weight:800;display:flex;align-items:center;justify-content:center;
}
.brief-item h4{font-size:14px;font-weight:700;line-height:1.5;margin-bottom:4px;cursor:pointer}
.brief-item h4:hover{color:var(--brand)}
.brief-item p{font-size:12.5px;color:var(--text-2);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.brief-meta{display:flex;align-items:center;gap:6px;margin-top:5px;font-size:11.5px;color:var(--text-3);flex-wrap:wrap}
.brief-foot{display:flex;gap:8px;margin-top:14px;padding-top:14px;border-top:1px solid var(--line-soft)}

/* ================= 首页 焦点三条 ================= */
.focus-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.focus{
  position:relative;overflow:hidden;border-radius:var(--radius);padding:22px;
  border:1px solid var(--line);background:var(--bg-card);box-shadow:var(--shadow);
  transition:.22s;display:block;
}
.focus:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.focus::after{content:"";position:absolute;inset:0;opacity:.05;background:var(--grad)}
.focus h3{font-size:17px;font-weight:800;margin-bottom:8px;display:flex;align-items:center;gap:8px}
.focus h3 i{width:26px;height:26px;border-radius:8px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-style:normal;flex-shrink:0}
.focus h3 i svg{width:14px;height:14px;color:#fff}
.focus p{font-size:13.5px;color:var(--text-2);line-height:1.7;margin-bottom:12px}
.focus ul{display:flex;flex-wrap:wrap;gap:6px}
.focus li{font-size:12px;padding:3px 9px;border-radius:6px;background:var(--line-soft);color:var(--text-2);font-weight:600}

/* ================= 资讯列表 ================= */
.news-layout{display:grid;grid-template-columns:1fr 300px;gap:26px;align-items:start}

.tabs{display:flex;gap:6px;padding:5px;background:var(--bg-card);border:1px solid var(--line);border-radius:12px;margin-bottom:18px;overflow-x:auto}
.tabs button{
  padding:7px 15px;border-radius:8px;font-size:14px;font-weight:600;color:var(--text-2);
  border:0;background:transparent;cursor:pointer;white-space:nowrap;transition:.18s;
}
.tabs button.on{background:var(--grad);color:#fff;box-shadow:0 3px 10px rgba(124,58,237,.28)}

.ncard{
  display:grid;grid-template-columns:150px 1fr;gap:16px;padding:16px;
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);
  margin-bottom:12px;transition:.2s;cursor:pointer;
}
.ncard:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:rgba(37,99,235,.28)}
.ncard-img{
  height:96px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;color:#fff;text-align:center;padding:10px;line-height:1.4;
  overflow:hidden;position:relative;
}
.ncard-img::after{content:"";position:absolute;inset:0;opacity:.08;background-image:radial-gradient(#fff 1px,transparent 1px);background-size:10px 10px}
.ncard-body{min-width:0}
.ncard h3{font-size:16.5px;font-weight:700;line-height:1.5;margin-bottom:6px;letter-spacing:-.2px}
.ncard p{font-size:13.5px;color:var(--text-2);line-height:1.65;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:9px}
.ncard-meta{display:flex;align-items:center;gap:7px;font-size:12.5px;color:var(--text-3);flex-wrap:wrap}
.ncard-meta .src{color:var(--text-2);font-weight:600}

/* 事件聚合标记 */
.merged{
  display:inline-flex;align-items:center;gap:4px;height:20px;padding:0 7px;border-radius:5px;
  background:rgba(6,182,212,.12);color:#0891b2;font-size:11px;font-weight:700;
}

/* ================= 侧栏 ================= */
.side{position:sticky;top:calc(var(--nav-h) + 18px);display:flex;flex-direction:column;gap:16px}
.side-card{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}
.side-card h4{font-size:14.5px;font-weight:800;margin-bottom:12px;display:flex;align-items:center;gap:7px}
.side-card h4::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--grad)}
.rank{display:flex;gap:10px;padding:8px 0;border-bottom:1px dashed var(--line-soft);cursor:pointer}
.rank:last-child{border-bottom:0}
.rank-no{flex-shrink:0;width:20px;height:20px;border-radius:6px;background:var(--line-soft);color:var(--text-3);font-size:11.5px;font-weight:800;display:flex;align-items:center;justify-content:center}
.rank:nth-child(2) .rank-no{background:rgba(239,68,68,.14);color:#dc2626}
.rank:nth-child(3) .rank-no{background:rgba(245,158,11,.16);color:#d97706}
.rank:nth-child(4) .rank-no{background:rgba(37,99,235,.12);color:#2563eb}
.rank-t{font-size:13.5px;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rank-t:hover{color:var(--brand)}
.rank small{font-size:11.5px;color:var(--text-3)}

.topic-chips{display:flex;flex-wrap:wrap;gap:7px}
.topic-chips a{
  padding:5px 11px;border-radius:8px;background:var(--line-soft);font-size:12.5px;
  color:var(--text-2);font-weight:600;transition:.18s;
}
.topic-chips a:hover{background:var(--grad);color:#fff}

/* ================= AI 助手入口 ================= */
.ai-bar{
  display:flex;align-items:center;gap:14px;padding:16px 20px;border-radius:var(--radius);
  background:var(--grad);color:#fff;box-shadow:var(--shadow-lg);margin-bottom:22px;
}
.ai-bar .ai-ico{
  width:42px;height:42px;border-radius:12px;background:rgba(255,255,255,.18);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.ai-bar .ai-ico svg{width:22px;height:22px}
.ai-bar b{display:block;font-size:15.5px;font-weight:800;margin-bottom:2px}
.ai-bar span{font-size:13px;opacity:.85}
.ai-bar .btn{background:#fff;color:var(--brand);height:38px;font-weight:700;margin-left:auto}

/* ================= 工具导航 ================= */
.filter-bar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.filter-bar button{
  padding:7px 14px;border-radius:9px;border:1px solid var(--line);background:var(--bg-card);
  font-size:13.5px;font-weight:600;color:var(--text-2);cursor:pointer;transition:.18s;
}
.filter-bar button:hover{border-color:var(--brand);color:var(--brand)}
.filter-bar button.on{background:var(--grad);color:#fff;border-color:transparent}

.tools-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.tool{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px;transition:.2s;cursor:pointer;position:relative;
}
.tool:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:rgba(37,99,235,.3)}
.tool-top{display:flex;align-items:center;gap:11px;margin-bottom:10px}
.tool-ico{
  width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:800;color:#fff;flex-shrink:0;
}
.tool-name{font-size:14.5px;font-weight:700;line-height:1.35}
.tool-en{font-size:11.5px;color:var(--text-3)}
.tool p{font-size:12.8px;color:var(--text-2);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:41px}
.tool-foot{display:flex;align-items:center;justify-content:space-between;margin-top:10px;font-size:11.5px;color:var(--text-3)}
.badge-hot{position:absolute;top:-1px;right:12px;background:var(--hot);color:#fff;font-size:10.5px;font-weight:800;padding:2px 7px;border-radius:0 0 6px 6px}

/* ================= 科普 / 学习路径 ================= */
.path-wrap{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.path{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px;transition:.2s;position:relative;overflow:hidden;
}
.path:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.path-step{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:7px;
  background:var(--grad);color:#fff;font-size:12px;font-weight:800;margin-bottom:12px;
}
.path h3{font-size:16.5px;font-weight:800;margin-bottom:8px}
.path p{font-size:13px;color:var(--text-2);line-height:1.7;margin-bottom:12px}
.path ol li{
  font-size:13px;color:var(--text-2);padding:6px 0;border-top:1px dashed var(--line-soft);
  display:flex;align-items:center;gap:8px;
}
.path ol li b{color:var(--brand);font-size:11.5px}

.glossary{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.glos{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:14px 16px;transition:.18s;
}
.glos:hover{border-color:var(--brand);box-shadow:var(--shadow)}
.glos h4{font-size:14.5px;font-weight:800;margin-bottom:5px;display:flex;align-items:center;gap:8px}
.glos h4 em{font-style:normal;font-size:11.5px;color:var(--text-3);font-weight:600}
.glos p{font-size:13px;color:var(--text-2);line-height:1.65}

/* ================= 社区 ================= */
.post{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px 18px;margin-bottom:12px;transition:.2s;
}
.post:hover{box-shadow:var(--shadow)}
.post-head{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.avatar{
  width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:13px;font-weight:800;flex-shrink:0;
}
.post-head .who{min-width:0}
.post-head .who b{display:block;font-size:14px;font-weight:700;line-height:1.3}
.post-head .who small{font-size:11.5px;color:var(--text-3)}
.post h3{font-size:16px;font-weight:700;line-height:1.5;margin-bottom:7px}
.post p{font-size:13.8px;color:var(--text-2);line-height:1.7;margin-bottom:10px}
.post-foot{display:flex;align-items:center;gap:16px;font-size:12.5px;color:var(--text-3)}
.post-foot span{display:flex;align-items:center;gap:5px;cursor:pointer;transition:.18s}
.post-foot span:hover{color:var(--brand)}
.post-foot svg{width:15px;height:15px}

.composer{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px;margin-bottom:16px;box-shadow:var(--shadow);
}
.composer textarea{
  width:100%;min-height:80px;border:1px solid var(--line);border-radius:10px;padding:12px;
  background:var(--bg);color:var(--text);resize:vertical;font-size:14px;line-height:1.6;
}
.composer textarea:focus{border-color:var(--brand)}
.composer-foot{display:flex;align-items:center;justify-content:space-between;margin-top:10px;gap:12px;flex-wrap:wrap}

/* ================= 详情页 ================= */
.article-wrap{display:grid;grid-template-columns:1fr 300px;gap:26px;align-items:start;max-width:var(--max);margin:0 auto;padding:26px 20px 50px}
.article-main{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);
  padding:32px 36px;box-shadow:var(--shadow);
}
.crumb{font-size:13px;color:var(--text-3);margin-bottom:14px}
.crumb a:hover{color:var(--brand)}
.article-main h1{font-size:28px;font-weight:900;line-height:1.4;letter-spacing:-.6px;margin-bottom:14px}
.article-meta{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);padding-bottom:18px;border-bottom:1px solid var(--line-soft);flex-wrap:wrap}

/* 三段式解读 */
.triple{margin:22px 0;padding:18px;background:var(--grad-soft);border-radius:var(--radius);border:1px solid var(--line)}
.triple h4{font-size:14px;font-weight:800;margin-bottom:10px;display:flex;align-items:center;gap:7px}
.triple h4 svg{width:16px;height:16px;color:var(--brand)}
.triple-item{display:flex;gap:10px;padding:8px 0;border-top:1px dashed rgba(148,163,184,.3)}
.triple-item:first-of-type{border-top:0}
.triple-item .lv{flex-shrink:0;margin-top:2px}
.triple-item p{font-size:13.8px;color:var(--text-2);line-height:1.7}

.article-body{font-size:16px;line-height:1.9;color:var(--text)}
.article-body p{margin-bottom:16px}
.article-body h2{font-size:20px;font-weight:800;margin:28px 0 12px;padding-left:11px;border-left:4px solid var(--brand)}
.article-body h3{font-size:17px;font-weight:700;margin:22px 0 10px}
.article-body ul{margin:0 0 16px;padding-left:2px}
.article-body li{padding:5px 0 5px 20px;position:relative;color:var(--text-2);font-size:15.5px}
.article-body li::before{content:"";position:absolute;left:4px;top:15px;width:6px;height:6px;border-radius:50%;background:var(--brand)}
.article-body blockquote{
  margin:18px 0;padding:14px 18px;border-left:3px solid var(--brand-2);
  background:var(--line-soft);border-radius:0 10px 10px 0;font-size:15px;color:var(--text-2);
}
.article-body code{
  padding:2px 6px;border-radius:5px;background:var(--line-soft);
  font-family:ui-monospace,Consolas,monospace;font-size:14px;color:var(--brand-2);
}
.keybox{
  margin:20px 0;padding:16px 18px;border-radius:var(--radius);
  background:rgba(37,99,235,.05);border:1px solid rgba(37,99,235,.16);
}
.keybox h4{font-size:14px;font-weight:800;color:var(--brand);margin-bottom:8px}
.keybox ul li{font-size:14.5px}

.article-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:28px;padding-top:20px;border-top:1px solid var(--line-soft)}

/* 相关工具 */
.rel-tools{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:14px}
.rel-tool{
  display:flex;gap:11px;padding:12px;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:var(--bg);transition:.18s;cursor:pointer;
}
.rel-tool:hover{border-color:var(--brand);background:var(--bg-card)}
.rel-tool .tool-ico{width:34px;height:34px;font-size:13px;border-radius:9px}
.rel-tool b{display:block;font-size:13.8px;font-weight:700;line-height:1.4}
.rel-tool small{font-size:12px;color:var(--text-3)}

/* ================= 页脚 ================= */
.footer{background:var(--bg-card);border-top:1px solid var(--line);margin-top:40px;padding:40px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px}
.footer h5{font-size:14px;font-weight:800;margin-bottom:14px}
.footer li{padding:5px 0;font-size:13.5px;color:var(--text-2)}
.footer li a:hover{color:var(--brand)}
.footer-about p{font-size:13.5px;color:var(--text-2);line-height:1.8;margin-top:12px}
.footer-bottom{
  border-top:1px solid var(--line-soft);padding-top:20px;
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}
.friend-links{display:flex;gap:8px;flex-wrap:wrap}
.friend-links a{font-size:12.5px;color:var(--text-3)}
.friend-links a:hover{color:var(--brand)}

/* ================= 移动端 ================= */
.mobile-nav{
  position:fixed;bottom:0;left:0;right:0;z-index:100;display:none;
  background:rgba(255,255,255,.94);backdrop-filter:blur(14px);
  border-top:1px solid var(--line);padding:6px 0 calc(6px + env(safe-area-inset-bottom));
}
html[data-theme="dark"] .mobile-nav{background:rgba(11,16,32,.94)}
.mobile-nav-in{display:flex}
.mobile-nav a{
  flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;
  font-size:11px;color:var(--text-3);padding:4px 0;font-weight:600;
}
.mobile-nav a.on{color:var(--brand)}
.mobile-nav svg{width:21px;height:21px}

@media (max-width:1000px){
  .hero-in{grid-template-columns:1fr;padding:32px 20px 28px}
  .hero h1{font-size:30px}
  .focus-grid{grid-template-columns:1fr}
  .tools-grid{grid-template-columns:repeat(3,1fr)}
  .path-wrap{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
}

@media (max-width:860px){
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .logo-img{height:30px}
  .logo-img-foot{height:40px}
  .news-layout,.article-wrap{grid-template-columns:1fr}
  .side{position:static}
  .side{display:none}
  .glossary{grid-template-columns:1fr}
  .article-main{padding:22px 18px}
  .article-main h1{font-size:23px}
  .article-body{font-size:15.5px}
  .rel-tools{grid-template-columns:1fr}
  .mobile-nav{display:block}
  body{padding-bottom:60px}
}

@media (max-width:640px){
  .wrap{padding:0 14px}
  .nav-search{display:none}
  .logo-img{height:26px}
  .hero h1{font-size:26px}
  .hero p{font-size:14.5px}
  .hero-stats{gap:18px}
  .hero-stat b{font-size:19px}
  .tools-grid{grid-template-columns:repeat(2,1fr)}
  .ncard{grid-template-columns:1fr;gap:10px}
  .ncard-img{height:120px}
  .ai-bar{flex-wrap:wrap}
  .ai-bar .btn{margin-left:0;width:100%}
  .footer-grid{grid-template-columns:1fr}
  .section{padding:26px 0}
  .sec-title{font-size:18px}
  .article-body{font-size:15px}
}

/* 抽屉菜单 */
.drawer{
  position:fixed;inset:0;z-index:200;background:rgba(15,23,42,.5);
  opacity:0;pointer-events:none;transition:.25s;
}
.drawer.on{opacity:1;pointer-events:auto}
.drawer-panel{
  position:absolute;top:0;right:0;bottom:0;width:260px;background:var(--bg-card);
  padding:20px;transform:translateX(100%);transition:.25s;
  display:flex;flex-direction:column;gap:6px;overflow-y:auto;
}
.drawer.on .drawer-panel{transform:translateX(0)}
.drawer-panel a{padding:12px 14px;border-radius:10px;font-size:15px;font-weight:600;color:var(--text-2)}
.drawer-panel a:hover{background:var(--line-soft);color:var(--brand)}
.drawer-close{align-self:flex-end;margin-bottom:8px}

/* 搜索浮层 */
.search-mask{
  position:fixed;inset:0;z-index:300;background:rgba(15,23,42,.45);
  display:none;padding-top:12vh;
}
.search-mask.on{display:block}
.search-box{
  max-width:600px;margin:0 auto;background:var(--bg-card);border-radius:16px;
  box-shadow:var(--shadow-lg);overflow:hidden;
}
.search-box input{
  width:100%;border:0;padding:18px 20px;font-size:16px;background:transparent;color:var(--text);
  border-bottom:1px solid var(--line);
}
.search-res{max-height:340px;overflow-y:auto;padding:8px}
.search-res a{display:block;padding:11px 14px;border-radius:9px;font-size:14px;color:var(--text-2)}
.search-res a:hover{background:var(--line-soft);color:var(--brand)}
.search-res .empty{padding:26px;text-align:center;color:var(--text-3);font-size:14px}

/* 加载更多 */
.load-more{text-align:center;padding:26px 0}
.load-more .btn{height:40px;padding:0 32px}

/* toast */
.toast{
  position:fixed;left:50%;bottom:80px;transform:translateX(-50%) translateY(20px);
  background:var(--text);color:var(--bg-card);padding:10px 20px;border-radius:10px;
  font-size:14px;font-weight:600;z-index:400;opacity:0;pointer-events:none;transition:.25s;
}
.toast.on{opacity:1;transform:translateX(-50%) translateY(0)}

/* ================= 悬浮客服 ================= */
.cs-wrap{
  position:fixed;right:14px;bottom:92px;z-index:350;
  display:flex;flex-direction:column;align-items:center;gap:9px;
  font-size:14px;
}

/* 顾问形象 */
.cs-agent{display:flex;flex-direction:column;align-items:center;cursor:pointer;position:relative}
.cs-avatar{
  position:relative;width:62px;height:62px;border-radius:50%;
  background:linear-gradient(135deg,#1d4ed8,#38bdf8);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 20px rgba(37,99,235,.42);
}
.cs-avatar::before{
  content:"";position:absolute;inset:-6px;border-radius:50%;
  border:2px dashed rgba(37,99,235,.55);animation:csSpin 14s linear infinite;
}
.cs-avatar::after{
  content:"";position:absolute;inset:-13px;border-radius:50%;
  background:radial-gradient(circle,rgba(56,189,248,.28),transparent 68%);
  animation:csGlow 2.8s ease-in-out infinite;
}
@keyframes csSpin{to{transform:rotate(360deg)}}
@keyframes csGlow{0%,100%{opacity:.35;transform:scale(1)}50%{opacity:.85;transform:scale(1.08)}}
.cs-avatar svg{width:34px;height:34px;color:#fff;position:relative}
.cs-badge{
  position:absolute;bottom:-2px;left:50%;transform:translateX(-50%);
  background:#fff;color:#2563eb;font-size:10px;font-weight:800;
  padding:1px 7px;border-radius:8px;box-shadow:0 2px 6px rgba(15,23,42,.18);white-space:nowrap;
}
.cs-name{
  margin-top:20px;font-size:12px;font-weight:800;color:var(--text);
  text-align:center;line-height:1.35;text-shadow:0 1px 6px rgba(255,255,255,.9);
  max-width:92px;
}
.cs-name small{display:block;font-size:10px;font-weight:600;color:var(--text-2)}
.cs-cta{
  margin-top:6px;background:var(--grad);color:#fff;font-size:11.5px;font-weight:700;
  padding:4px 12px;border-radius:20px;box-shadow:0 4px 12px rgba(124,58,237,.32);
  animation:csBreath 3s ease-in-out infinite;white-space:nowrap;
}
@keyframes csBreath{0%,100%{transform:translateY(0)}50%{transform:translateY(-3px)}}

/* 面板 */
.cs-panel{
  width:94px;background:var(--bg-card);border:1px solid var(--line);
  border-radius:14px;box-shadow:0 10px 34px rgba(15,23,42,.16);overflow:hidden;
  animation:csIn .22s ease;
}
@keyframes csIn{from{opacity:0;transform:translateY(8px) scale(.96)}to{opacity:1;transform:none}}
.cs-item{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  padding:10px 4px;cursor:pointer;transition:.16s;border-bottom:1px solid var(--line-soft);
}
.cs-item:last-child{border-bottom:0}
.cs-item:hover{background:var(--line-soft)}
.cs-item i{
  width:26px;height:26px;border-radius:8px;background:var(--grad);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.cs-item i svg{width:15px;height:15px;color:#fff}
.cs-item span{font-size:12px;font-weight:600;color:var(--text-2)}
.cs-item:hover span{color:var(--brand)}

/* 收起按钮 */
.cs-toggle{
  width:38px;height:38px;border-radius:50%;background:var(--bg-card);
  border:1px solid var(--line);box-shadow:0 4px 14px rgba(15,23,42,.14);
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  color:var(--brand);transition:.18s;
}
.cs-toggle:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(37,99,235,.24)}
.cs-toggle svg{width:17px;height:17px}

/* 收起态：只留头像 */
.cs-wrap.mini .cs-panel,.cs-wrap.mini .cs-name,.cs-wrap.mini .cs-cta,.cs-wrap.mini .cs-toggle{display:none}
.cs-wrap.mini{bottom:88px}

/* 客服弹窗 */
.cs-modal{
  position:fixed;inset:0;z-index:500;background:rgba(15,23,42,.5);
  display:none;align-items:center;justify-content:center;padding:20px;
}
.cs-modal.on{display:flex}
.cs-modal-box{
  width:100%;max-width:400px;background:var(--bg-card);border-radius:18px;
  box-shadow:0 20px 60px rgba(15,23,42,.3);overflow:hidden;animation:csIn .22s ease;
}
.cs-modal-head{
  padding:18px 22px;background:var(--grad);color:#fff;
  display:flex;align-items:center;justify-content:space-between;
}
.cs-modal-head b{font-size:16px;font-weight:800}
.cs-modal-head small{display:block;font-size:12px;opacity:.85;margin-top:2px}
.cs-modal-body{padding:20px 22px;max-height:60vh;overflow-y:auto}
.cs-contact{
  display:flex;align-items:center;gap:10px;padding:11px 0;
  border-bottom:1px dashed var(--line-soft);font-size:13.5px;
}
.cs-contact:last-of-type{border-bottom:0}
.cs-contact b{color:var(--text-2);font-weight:600;width:62px;flex-shrink:0}
.cs-contact span{color:var(--text);font-weight:600}
.cs-modal-body textarea{
  width:100%;min-height:88px;margin-top:14px;border:1px solid var(--line);border-radius:10px;
  padding:12px;background:var(--bg);color:var(--text);resize:vertical;font-size:14px;line-height:1.6;
}
.cs-modal-body textarea:focus{border-color:var(--brand)}
.cs-modal-body input{
  width:100%;height:40px;margin-top:10px;border:1px solid var(--line);border-radius:10px;
  padding:0 12px;background:var(--bg);color:var(--text);font-size:14px;
}
.cs-modal-foot{padding:14px 22px;border-top:1px solid var(--line-soft);display:flex;gap:10px}
.cs-modal-foot .btn{flex:1;height:40px}

@media (max-width:860px){
  .cs-wrap{right:10px;bottom:72px;transform:scale(.88);transform-origin:bottom right}
  .cs-panel{width:88px}
}

/* ================= 会员相关 ================= */
.auth-wrap{max-width:420px;margin:46px auto;padding:0 20px}
.auth-card{background:var(--bg-card);border:1px solid var(--line);border-radius:18px;padding:30px;box-shadow:var(--shadow)}
.auth-tabs{display:flex;gap:6px;padding:5px;background:var(--bg);border-radius:12px;margin-bottom:22px}
.auth-tabs button{
  flex:1;height:36px;border:0;border-radius:9px;font-size:14.5px;font-weight:700;
  color:var(--text-2);background:transparent;cursor:pointer;transition:.18s;
}
.auth-tabs button.on{background:var(--grad);color:#fff;box-shadow:0 3px 10px rgba(124,58,237,.26)}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--text-2);margin-bottom:6px}
.field input{
  width:100%;height:44px;border:1px solid var(--line);border-radius:11px;padding:0 14px;
  background:var(--bg);color:var(--text);font-size:14.5px;transition:.18s;
}
.field input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(37,99,235,.1)}
.auth-err{background:rgba(239,68,68,.08);color:#dc2626;font-size:13px;padding:9px 12px;border-radius:9px;margin-bottom:14px;display:none}
.auth-err.on{display:block}
.auth-tip{font-size:12.5px;color:var(--text-3);text-align:center;margin-top:16px;line-height:1.6}

.member-hero{
  background:var(--grad);border-radius:18px;padding:26px;color:#fff;margin-bottom:20px;
  display:flex;align-items:center;gap:18px;flex-wrap:wrap;
}
.member-av{width:66px;height:66px;border-radius:50%;background:rgba(255,255,255,.22);display:flex;align-items:center;justify-content:center;font-size:26px;font-weight:800;flex-shrink:0}
.member-hero h2{font-size:20px;font-weight:800}
.member-hero p{font-size:13px;opacity:.88;margin-top:3px}
.member-plan{
  margin-left:auto;background:rgba(255,255,255,.18);padding:6px 14px;border-radius:20px;
  font-size:12.5px;font-weight:700;
}
.m-stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:22px}
.m-stat{background:var(--bg-card);border:1px solid var(--line);border-radius:14px;padding:16px;text-align:center}
.m-stat b{display:block;font-size:22px;font-weight:800;color:var(--brand);line-height:1.2}
.m-stat span{font-size:12.5px;color:var(--text-3)}
.m-section{background:var(--bg-card);border:1px solid var(--line);border-radius:16px;padding:20px;margin-bottom:16px}
.m-section h3{font-size:16px;font-weight:800;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.m-section h3::before{content:"";width:3px;height:15px;border-radius:2px;background:var(--grad)}
.m-topic-pick{display:flex;flex-wrap:wrap;gap:8px}
.m-topic-pick span{
  padding:6px 13px;border-radius:9px;background:var(--line-soft);font-size:13px;
  color:var(--text-2);cursor:pointer;font-weight:600;transition:.16s;
}
.m-topic-pick span.on{background:var(--grad);color:#fff}
@media(max-width:640px){.m-stat-grid{grid-template-columns:repeat(2,1fr)}}