/* ============================================================
   新开道 GEO 官网 · 设计系统
   暗色科技 + 鎏金 ｜ 移动优先 ｜ 零框架依赖
   ============================================================ */
:root{
  --bg:#070b18;
  --bg-2:#0b1124;
  --panel:rgba(20,27,48,.72);
  --panel-solid:#141b30;
  --panel-2:#1b2342;
  --line:rgba(80,96,140,.22);
  --line-strong:rgba(120,138,190,.34);

  --gold:#d4af37;
  --gold-2:#e9cf7a;
  --gold-3:#f4e3a8;
  --gold-glow:rgba(212,175,55,.35);

  --txt:#eef2fb;
  --txt-2:#c8d2ec;
  --muted:#8d9ac0;
  --muted-2:#6b78a0;

  --accent:#5b8dff;
  --green:#36d399;
  --red:#f87272;

  --radius:16px;
  --radius-sm:11px;
  --radius-lg:24px;
  --shadow:0 24px 60px -28px rgba(0,0,0,.7);
  --shadow-gold:0 18px 50px -22px rgba(212,175,55,.4);
  --maxw:1200px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--txt);
  font-family:var(--sans);line-height:1.75;font-size:16px;
  overflow-x:hidden;
  background-image:
    radial-gradient(1100px 540px at 82% -8%,rgba(212,175,55,.12),transparent 60%),
    radial-gradient(900px 600px at -5% 12%,rgba(91,141,255,.10),transparent 55%),
    linear-gradient(180deg,#070b18 0%,#080d1d 40%,#070b18 100%);
  background-attachment:fixed;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25;letter-spacing:.3px}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
code{font-family:ui-monospace,"Cascadia Code",Consolas,monospace;background:rgba(91,141,255,.14);
  border:1px solid rgba(91,141,255,.28);border-radius:6px;padding:1px 7px;color:#bcd3ff;font-size:.9em}

/* ---------- 布局 ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:84px 0;position:relative}
.section-sm{padding:56px 0}
@media(max-width:768px){.section{padding:56px 0}.wrap{padding:0 18px}}

/* ---------- 顶部导航 ---------- */
.nav{
  position:sticky;top:0;z-index:100;
  background:rgba(7,11,24,.72);backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:70px;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:19px;letter-spacing:1px}
.brand .mark{
  width:38px;height:38px;border-radius:11px;flex:none;
  background:linear-gradient(135deg,#f4e3a8,#d4af37 55%,#9c7c1e);
  display:grid;place-items:center;color:#1a1205;font-weight:900;font-size:18px;
  box-shadow:0 6px 18px -6px var(--gold-glow);
  font-family:var(--serif);
}
.brand b{color:var(--gold-2)}
.brand small{display:block;font-size:10.5px;letter-spacing:3px;color:var(--muted);font-weight:600}
.menu{display:flex;align-items:center;gap:4px}
.menu a{padding:9px 14px;border-radius:9px;font-size:14.5px;color:var(--txt-2);font-weight:500;transition:.22s var(--ease);position:relative}
.menu a:hover{color:#fff;background:rgba(255,255,255,.05)}
.menu a.active{color:var(--gold-2)}
.menu a.active::after{content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--gold),var(--gold-2))}
.nav-cta{display:flex;align-items:center;gap:10px}
.burger{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:10px;background:transparent;color:var(--txt);cursor:pointer;font-size:20px}
@media(max-width:980px){
  .menu{
    position:fixed;inset:70px 0 auto 0;flex-direction:column;align-items:stretch;gap:2px;
    background:rgba(8,13,29,.98);backdrop-filter:blur(20px);padding:12px 18px 26px;
    border-bottom:1px solid var(--line);transform:translateY(-130%);transition:.4s var(--ease);max-height:calc(100vh - 70px);overflow:auto;
  }
  .menu.open{transform:translateY(0)}
  .menu a{padding:14px 12px;font-size:16px;border-bottom:1px solid var(--line)}
  .menu a.active::after{display:none}
  .burger{display:grid;place-items:center}
  .nav-cta .btn-txt{display:none}
}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 26px;border-radius:999px;font-weight:700;font-size:15px;cursor:pointer;border:1px solid transparent;transition:.26s var(--ease);white-space:nowrap}
.btn-gold{background:linear-gradient(135deg,#f4e3a8,#d4af37);color:#1a1205;box-shadow:var(--shadow-gold)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 24px 60px -18px var(--gold-glow)}
.btn-ghost{border-color:var(--line-strong);color:var(--txt);background:rgba(255,255,255,.02)}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold-2);background:rgba(212,175,55,.07)}
.btn-sm{padding:9px 18px;font-size:13.5px}

/* ---------- 通用标题 ---------- */
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:3px;color:var(--gold);font-weight:700;text-transform:uppercase}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--gold)}
.sec-title{font-size:clamp(28px,4vw,44px);margin:14px 0 16px;color:#fff;line-height:1.2}
.sec-title em{font-style:normal;color:var(--gold-2)}
.sec-sub{color:var(--muted);font-size:16px;max-width:680px}
.center{text-align:center}
.center .sec-sub{margin-inline:auto}
.head{margin-bottom:46px}

/* ---------- 卡片 ---------- */
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px;backdrop-filter:blur(8px);transition:.3s var(--ease);position:relative;overflow:hidden}
.card:hover{border-color:var(--line-strong);transform:translateY(-4px);box-shadow:var(--shadow)}
.card-grad::before{content:"";position:absolute;inset:0;background:radial-gradient(420px 180px at 90% -10%,rgba(212,175,55,.14),transparent 70%);pointer-events:none}

/* ---------- 首页 Hero ---------- */
.hero{position:relative;padding:72px 0 60px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:50px;align-items:center}
@media(max-width:920px){.hero-grid{grid-template-columns:1fr;gap:36px}}
.hero h1{font-size:clamp(34px,5.4vw,60px);line-height:1.12;color:#fff;margin:18px 0 20px;font-family:var(--sans)}
.hero h1 .g{background:linear-gradient(120deg,#f4e3a8,#d4af37 60%,#e9cf7a);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero h1 .thin{font-weight:500;color:var(--txt-2)}
.hero p.lead{font-size:18px;color:var(--txt-2);max-width:560px;margin-bottom:30px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-trust{display:flex;gap:26px;flex-wrap:wrap;margin-top:34px;padding-top:26px;border-top:1px solid var(--line)}
.hero-trust .t b{display:block;font-size:26px;color:var(--gold-2);font-weight:800}
.hero-trust .t span{font-size:13px;color:var(--muted)}

/* hero 右侧引擎可视化 */
.engine-viz{position:relative;width:520px;height:520px;margin:0 auto;flex:none}
.engine-core{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:200px;height:200px;border-radius:50%;
  background:radial-gradient(circle at 35% 30%,#f4e3a8,#d4af37 50%,#8a6c1c);
  display:grid;place-items:center;text-align:center;color:#1a1205;font-weight:800;font-size:18px;
  box-shadow:0 0 80px var(--gold-glow),inset 0 0 30px rgba(255,255,255,.4);z-index:2}
.engine-core small{display:block;font-size:11px;letter-spacing:2px;opacity:.7;margin-top:4px}
.engine-orbit{position:absolute;inset:30px;border:1px dashed rgba(212,175,55,.35);border-radius:50%;animation:spin 40s linear infinite}
.engine-orbit.o2{inset:80px;border-color:rgba(91,141,255,.22);animation-direction:reverse;animation-duration:28s}
.engine-chip{position:absolute;width:88px;height:88px;border-radius:18px;display:grid;place-items:center;font-size:13px;font-weight:700;text-align:center;
  background:rgba(20,27,48,.95);border:1px solid var(--line-strong);color:var(--txt);box-shadow:0 8px 24px rgba(0,0,0,.5),0 0 20px rgba(0,0,0,.3);line-height:1.25;backdrop-filter:blur(6px);
  transition:.3s var(--ease);z-index:3}
.engine-chip:hover{border-color:var(--gold);transform:scale(1.08);box-shadow:0 12px 30px rgba(0,0,0,.6),0 0 30px var(--gold-glow)}
.engine-chip span{display:block;font-size:10px;color:var(--muted);font-weight:500;margin-top:3px;letter-spacing:.5px}
.engine-chip .dot{position:absolute;width:9px;height:9px;border-radius:50%;top:10px;right:10px;box-shadow:0 0 8px currentColor}

/* 6 chips using transform rotate+translate for precise circular placement */
.engine-chip.ec-0{left:50%;top:50%;transform:rotate(0deg) translate(220px) rotate(-0deg)}
.engine-chip.ec-60{left:50%;top:50%;transform:rotate(60deg) translate(220px) rotate(-60deg)}
.engine-chip.ec-120{left:50%;top:50%;transform:rotate(120deg) translate(220px) rotate(-120deg)}
.engine-chip.ec-180{left:50%;top:50%;transform:rotate(180deg) translate(220px) rotate(-180deg)}
.engine-chip.ec-240{left:50%;top:50%;transform:rotate(240deg) translate(220px) rotate(-240deg)}
.engine-chip.ec-300{left:50%;top:50%;transform:rotate(300deg) translate(220px) rotate(-300deg)}
.engine-chip.ec-0:hover,.engine-chip.ec-60:hover,.engine-chip.ec-120:hover,.engine-chip.ec-180:hover,.engine-chip.ec-240:hover,.engine-chip.ec-300:hover{/* scale only, keep position */}
.engine-chip.ec-0:hover{transform:rotate(0deg) translate(220px) scale(1.08)}
.engine-chip.ec-60:hover{transform:rotate(60deg) translate(220px) scale(1.08)}
.engine-chip.ec-120:hover{transform:rotate(120deg) translate(220px) scale(1.08)}
.engine-chip.ec-180:hover{transform:rotate(180deg) translate(220px) scale(1.08)}
.engine-chip.ec-240:hover{transform:rotate(240deg) translate(220px) scale(1.08)}
.engine-chip.ec-300:hover{transform:rotate(300deg) translate(220px) scale(1.08)}

@media(max-width:640px){
  .engine-viz{width:340px;height:340px}
  .engine-core{width:130px;height:130px;font-size:14px}
  .engine-orbit{inset:20px}
  .engine-orbit.o2{inset:55px}
  .engine-chip{width:62px;height:62px;font-size:11px}
  .engine-chip span{font-size:8px}
  .engine-chip.ec-0,.engine-chip.ec-60,.engine-chip.ec-120,.engine-chip.ec-180,.engine-chip.ec-240,.engine-chip.ec-300{transform:rotate(var(--a,0)) translate(145px) rotate(calc(-1*var(--a,0)))}
  .engine-chip.ec-0{--a:0}
  .engine-chip.ec-60{--a:60}
  .engine-chip.ec-120{--a:120}
  .engine-chip.ec-180{--a:180}
  .engine-chip.ec-240{--a:240}
  .engine-chip.ec-300{--a:300}
}

@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- 核心数据带 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media(max-width:780px){.stats{grid-template-columns:repeat(2,1fr)}}
.stat{background:linear-gradient(160deg,var(--panel-2),var(--panel-solid));border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;position:relative;overflow:hidden;transition:.3s var(--ease)}
.stat:hover{border-color:var(--gold);transform:translateY(-3px)}
.stat .num{font-size:clamp(34px,5vw,48px);font-weight:800;color:var(--gold-2);line-height:1;font-family:var(--sans)}
.stat .num small{font-size:.45em;color:var(--gold);margin-left:3px}
.stat .lab{margin-top:10px;font-size:14px;color:var(--txt-2);font-weight:600}
.stat .desc{margin-top:4px;font-size:12.5px;color:var(--muted)}
.stat::after{content:"";position:absolute;right:-30px;top:-30px;width:110px;height:110px;border-radius:50%;background:radial-gradient(circle,var(--gold-glow),transparent 70%);opacity:.5}

/* ---------- 方法论卡 ---------- */
.grid{display:grid;gap:20px}
.g2{grid-template-columns:1fr 1fr}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){.g3,.g4{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.g2,.g3,.g4{grid-template-columns:1fr}}
.method-card{padding:30px 26px}
.method-card .ico{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;font-size:24px;margin-bottom:18px;
  background:linear-gradient(135deg,rgba(212,175,55,.18),rgba(212,175,55,.04));border:1px solid rgba(212,175,55,.3);color:var(--gold-2)}
.method-card h3{font-size:19px;color:#fff;margin-bottom:10px}
.method-card p{color:var(--muted);font-size:14.5px}
.method-card .tag-mini{display:inline-block;margin-top:14px;font-size:11.5px;color:var(--gold);border:1px solid rgba(212,175,55,.4);padding:3px 10px;border-radius:999px;letter-spacing:1px}

/* ---------- 行业入口 ---------- */
.ind-card{display:flex;flex-direction:column;justify-content:space-between;padding:24px;min-height:138px;cursor:pointer}
.ind-card .top{display:flex;align-items:center;gap:12px}
.ind-card .ico{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;font-size:21px;background:var(--panel-2);border:1px solid var(--line);color:var(--gold-2)}
.ind-card h3{font-size:17px;color:#fff}
.ind-card p{font-size:13px;color:var(--muted);margin-top:8px}
.ind-card .arr{color:var(--gold);font-size:13px;margin-top:14px;transition:.25s}
.ind-card:hover .arr{transform:translateX(5px)}

/* ---------- 洞察文章流 ---------- */
.ins-card{display:flex;flex-direction:column;padding:0;overflow:hidden}
.ins-card .body{padding:24px;display:flex;flex-direction:column;flex:1}
.ins-card .cat{font-size:11.5px;letter-spacing:1.5px;color:var(--gold);font-weight:700;text-transform:uppercase}
.ins-card h3{font-size:18px;margin:10px 0 10px;color:#fff;line-height:1.35;transition:.25s}
.ins-card:hover h3{color:var(--gold-2)}
.ins-card p{font-size:14px;color:var(--muted);flex:1}
.ins-card .meta{display:flex;align-items:center;gap:10px;margin-top:18px;font-size:12.5px;color:var(--muted-2);padding-top:16px;border-top:1px solid var(--line)}
.ins-card .meta .av{width:26px;height:26px;border-radius:50%;background:linear-gradient(135deg,#d4af37,#8a6c1c);display:grid;place-items:center;color:#1a1205;font-size:11px;font-weight:800}

/* ---------- 浮动 CTA ---------- */
.fab{position:fixed;right:22px;bottom:22px;z-index:90;display:flex;flex-direction:column;align-items:flex-end;gap:12px}
.fab .fab-btn{display:inline-flex;align-items:center;gap:9px;padding:14px 22px;border-radius:999px;
  background:linear-gradient(135deg,#f4e3a8,#d4af37);color:#1a1205;font-weight:800;font-size:14.5px;box-shadow:var(--shadow-gold);cursor:pointer;border:none;transition:.26s var(--ease)}
.fab .fab-btn:hover{transform:translateY(-2px) scale(1.03)}
.fab .top-btn{width:44px;height:44px;border-radius:50%;border:1px solid var(--line-strong);background:var(--panel-solid);color:var(--txt);cursor:pointer;font-size:18px;backdrop-filter:blur(8px);transition:.25s}
.fab .top-btn:hover{border-color:var(--gold);color:var(--gold-2)}
@media(max-width:600px){.fab{right:14px;bottom:14px}.fab .fab-btn{padding:12px 18px;font-size:13.5px}}

/* ---------- 页脚 ---------- */
.footer{border-top:1px solid var(--line);background:linear-gradient(180deg,transparent,rgba(7,11,24,.6));padding:60px 0 30px;margin-top:40px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
@media(max-width:820px){.foot-grid{grid-template-columns:1fr 1fr;gap:30px}}
@media(max-width:520px){.foot-grid{grid-template-columns:1fr}}
.footer h4{font-size:14px;color:#fff;margin-bottom:16px;letter-spacing:1px}
.footer ul li{margin-bottom:10px}
.footer ul a{color:var(--muted);font-size:14px;transition:.2s}
.footer ul a:hover{color:var(--gold-2)}
.foot-brand p{color:var(--muted);font-size:13.5px;margin-top:14px;max-width:340px;line-height:1.8}
.foot-bottom{border-top:1px solid var(--line);padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;color:var(--muted-2);font-size:12.5px}
.foot-bottom a{color:var(--muted)}

/* ---------- 面包屑 ---------- */
.crumb{padding:26px 0 0;font-size:13.5px;color:var(--muted)}
.crumb a{color:var(--muted);transition:.2s}
.crumb a:hover{color:var(--gold-2)}
.crumb .sep{margin:0 8px;color:var(--muted-2)}
.crumb .cur{color:var(--txt-2)}

/* ---------- 页面通用 hero（内页）---------- */
.page-hero{padding:54px 0 36px;border-bottom:1px solid var(--line);
  background:radial-gradient(900px 300px at 80% -30%,rgba(212,175,55,.12),transparent 60%)}
.page-hero h1{font-size:clamp(30px,4.6vw,46px);color:#fff;margin:12px 0 14px}
.page-hero p{color:var(--txt-2);font-size:17px;max-width:720px}

/* ---------- FAQ 折叠 ---------- */
.faq{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--panel)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:last-child{border-bottom:none}
.faq-q{width:100%;text-align:left;padding:20px 24px;background:none;border:none;color:#fff;font-size:16px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;font-family:var(--sans)}
.faq-q .pm{flex:none;width:26px;height:26px;border-radius:50%;border:1px solid var(--line-strong);display:grid;place-items:center;color:var(--gold-2);font-size:16px;transition:.3s var(--ease)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .36s var(--ease)}
.faq-a div{padding:0 24px 22px;color:var(--muted);font-size:14.5px;line-height:1.85}
.faq-item.open .pm{transform:rotate(45deg);background:var(--gold);color:#1a1205;border-color:var(--gold)}

/* ---------- 表格 ---------- */
.tbl{width:100%;border-collapse:collapse;font-size:14px;margin:8px 0;overflow:hidden;border-radius:var(--radius)}
.tbl th,.tbl td{border:1px solid var(--line);padding:14px 16px;text-align:left;vertical-align:top}
.tbl th{background:var(--panel-2);color:var(--gold-2);font-weight:700;white-space:nowrap}
.tbl tr:hover td{background:rgba(212,175,55,.04)}

/* ---------- 标签/胶囊 ---------- */
.pill{display:inline-block;background:rgba(91,141,255,.13);color:#bcd3ff;border:1px solid rgba(91,141,255,.3);border-radius:999px;padding:3px 11px;font-size:12.5px;margin:3px}
.pill.g{background:rgba(212,175,55,.12);color:var(--gold-2);border-color:rgba(212,175,55,.32)}

/* ---------- 对比卡 ---------- */
.vs{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media(max-width:680px){.vs{grid-template-columns:1fr}}
.vs .col{border-radius:var(--radius);padding:28px;border:1px solid var(--line)}
.vs .col.seo{background:linear-gradient(160deg,var(--panel-2),var(--panel-solid))}
.vs .col.geo{background:linear-gradient(160deg,rgba(212,175,55,.1),var(--panel-solid));border-color:rgba(212,175,55,.3)}
.vs .col h3{font-size:20px;margin-bottom:14px;display:flex;align-items:center;gap:10px}
.vs .col.geo h3{color:var(--gold-2)}
.vs .col ul li{padding:7px 0 7px 24px;position:relative;color:var(--txt-2);font-size:14.5px}
.vs .col ul li::before{content:"";position:absolute;left:0;top:13px;width:8px;height:8px;border-radius:50%;background:var(--muted)}
.vs .col.geo ul li::before{background:var(--gold)}

/* ---------- 表单 ---------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:600px){.form-grid{grid-template-columns:1fr}}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1/-1}
.field label{font-size:13.5px;color:var(--txt-2);font-weight:600}
.field label .req{color:var(--gold)}
.field input,.field select,.field textarea{
  background:var(--bg-2);border:1px solid var(--line);border-radius:11px;padding:13px 15px;color:var(--txt);font-size:15px;font-family:var(--sans);transition:.22s var(--ease)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 3px rgba(212,175,55,.15)}
.field textarea{resize:vertical;min-height:120px}
.form-note{font-size:12.5px;color:var(--muted);margin-top:10px}
.form-ok{background:rgba(54,211,153,.1);border:1px solid rgba(54,211,153,.4);border-radius:12px;padding:16px 20px;color:#bdf3d8;font-size:14px;display:none}
.form-ok.show{display:block}

/* ---------- 筛选器 ---------- */
.filters{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px}
.filter{padding:9px 18px;border-radius:999px;border:1px solid var(--line);background:var(--panel);color:var(--txt-2);font-size:13.5px;cursor:pointer;transition:.22s var(--ease);font-family:var(--sans)}
.filter:hover{border-color:var(--line-strong);color:#fff}
.filter.active{background:linear-gradient(135deg,#f4e3a8,#d4af37);color:#1a1205;border-color:transparent;font-weight:700}

/* ---------- 时间线 ---------- */
.timeline{position:relative;padding-left:30px}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2px;background:linear-gradient(180deg,var(--gold),transparent)}
.tl-item{position:relative;padding-bottom:30px}
.tl-item::before{content:"";position:absolute;left:-30px;top:4px;width:18px;height:18px;border-radius:50%;background:var(--bg);border:3px solid var(--gold);box-shadow:0 0 0 4px rgba(212,175,55,.15)}
.tl-item .yr{font-size:13px;color:var(--gold);font-weight:700;letter-spacing:1px}
.tl-item h4{font-size:16px;color:#fff;margin:4px 0 6px}
.tl-item p{color:var(--muted);font-size:14px}

/* ---------- 术语表 ---------- */
.gloss{display:grid;grid-template-columns:200px 1fr;gap:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
@media(max-width:680px){.gloss{grid-template-columns:1fr}}
.gloss .term{padding:16px 20px;border-bottom:1px solid var(--line);font-weight:700;color:var(--gold-2);background:var(--panel-2);font-size:14.5px}
.gloss .def{padding:16px 20px;border-bottom:1px solid var(--line);color:var(--muted);font-size:14px;line-height:1.8}
.gloss .row{display:contents}
.gloss .row:last-child .term,.gloss .row:last-child .def{border-bottom:none}

/* ---------- 引擎徽章 ---------- */
.engines{display:flex;flex-wrap:wrap;gap:12px}
.engine-badge{display:flex;align-items:center;gap:10px;padding:12px 18px;border-radius:14px;background:var(--panel);border:1px solid var(--line);transition:.25s}
.engine-badge:hover{border-color:var(--gold);transform:translateY(-2px)}
.engine-badge .dot{width:10px;height:10px;border-radius:50%;flex:none}
.engine-badge b{font-size:14px;color:#fff}
.engine-badge span{font-size:12px;color:var(--muted)}

/* ---------- 通用工具 ---------- */
.mt-0{margin-top:0}.mt-20{margin-top:20px}.mt-40{margin-top:40px}
.mb-0{margin-bottom:0}.mb-20{margin-bottom:20px}
.txt-gold{color:var(--gold-2)}.txt-muted{color:var(--muted)}
.divider{height:1px;background:var(--line);margin:40px 0;border:none}
.note{background:rgba(54,211,153,.07);border:1px solid rgba(54,211,153,.32);border-radius:12px;padding:14px 18px;color:#bdf3d8;font-size:14px;line-height:1.8}
.note.warn{background:rgba(212,175,55,.07);border-color:rgba(212,175,55,.32);color:var(--gold-2)}

/* 滚动渐入 */
.reveal{opacity:0;transform:translateY(26px);transition:.7s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}.engine-orbit{animation:none}}