/* ============================================================
   jiakechongorgcn — 甲壳虫 ADB 助手 专题站
   开发者工具风：深海军蓝 + 灰 + 橙强调；全部本地化资源
   ============================================================ */

:root{
  --navy:#0E2037;
  --navy-2:#0B1A2D;
  --navy-3:#0A1828;
  --slate:#1A2C44;
  --slate-2:#243B5E;
  --line:#2A3F5C;
  --line-2:#3A537A;
  --ink:#0F2540;
  --ink-soft:#3D516F;
  --muted:#7A8DA3;
  --bg:#F4F6FB;
  --bg-soft:#ECEFF5;
  --bg-2:#E4EAF4;
  --paper:#FFFFFF;
  --cream:#F7F9FD;

  --accent:#FF8A3C;
  --accent-deep:#D66A18;
  --accent-soft:#FFE7D2;
  --accent-glow:rgba(255,138,60,.22);

  --cyan:#38C6E8;
  --cyan-deep:#1AA3C2;
  --cyan-soft:#D4F1FA;
  --green:#37D67A;
  --green-deep:#1FA95A;
  --green-soft:#D5F3E0;
  --yellow:#F5C451;
  --red:#FF5A5F;

  --shadow-sm:0 4px 12px rgba(14,32,55,.06);
  --shadow-md:0 14px 30px rgba(14,32,55,.12);
  --shadow-lg:0 28px 60px rgba(14,32,55,.20);
  --radius:14px;
  --radius-lg:20px;
  --radius-xl:28px;
  --maxw:1180px;
  --nav-h:68px;

  --font-sans:-apple-system,"Segoe UI","Microsoft YaHei","PingFang SC","Hiragino Sans GB",sans-serif;
  --font-display:"Microsoft YaHei","PingFang SC","DengXian",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"JetBrains Mono","Fira Code",Consolas,monospace;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-sans);
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  font-size:16px;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--accent-deep);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--accent)}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--ink);font-weight:700;line-height:1.3;letter-spacing:.01em}
h1{font-size:clamp(28px,4vw,44px)}
h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:14px}
h3{font-size:20px;margin-bottom:10px}
h4{font-size:17px;margin-bottom:8px}
p{margin-bottom:14px;color:var(--ink-soft)}
ul,ol{margin:8px 0 14px 22px;color:var(--ink-soft)}
li{margin-bottom:6px}
hr{border:0;height:1px;background:#D7DEEA;margin:30px 0}
code,.kbd{font-family:var(--font-mono);font-size:.92em}
code{background:var(--bg-soft);padding:2px 6px;border-radius:6px;color:var(--ink);border:1px solid #E2E7F0}

/* ---------- layout ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
section{padding:72px 0}
@media(max-width:780px){section{padding:46px 0}}

/* ---------- nav ---------- */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid #E2E7F0;
}
.nav-inner{
  max-width:var(--maxw);height:var(--nav-h);margin:0 auto;padding:0 22px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
}
.nav-logo{display:flex;align-items:center}
.nav-logo img{height:46px;width:auto;display:block}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{
  display:inline-flex;align-items:center;
  padding:8px 14px;border-radius:10px;
  color:var(--ink);font-weight:500;
  transition:background .2s ease,color .2s ease;
}
.nav-links a:hover{background:var(--bg-soft);color:var(--accent-deep)}
.nav-links a.is-active{background:var(--accent-soft);color:var(--accent-deep)}
.nav-cta{
  background:linear-gradient(135deg,var(--accent),var(--accent-deep));
  color:#fff !important;padding:9px 18px !important;
  border-radius:999px;font-weight:600;
  box-shadow:0 6px 16px rgba(214,106,24,.32);
  position:relative;overflow:hidden;
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(214,106,24,.4);color:#fff !important}
.nav-cta::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 30% 20%,rgba(255,255,255,.5),transparent 55%);
  opacity:0;transition:opacity .3s ease;
}
.nav-cta:hover::after{opacity:1}
.nav-toggle{
  display:none;background:transparent;border:0;
  width:40px;height:40px;border-radius:10px;cursor:pointer;
}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);margin:5px auto}
@media(max-width:880px){
  .nav-links{display:none;flex-direction:column;align-items:stretch;
    position:absolute;top:var(--nav-h);left:0;right:0;
    background:var(--paper);padding:14px 22px;border-bottom:1px solid #E2E7F0;
    box-shadow:var(--shadow-md);
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:10px 14px}
  .nav-toggle{display:block}
}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;
  padding:14px 26px;border-radius:999px;font-weight:600;font-size:15px;
  border:0;cursor:pointer;text-decoration:none;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease;
}
.btn-primary{
  background:linear-gradient(135deg,var(--accent),var(--accent-deep));
  color:#fff;box-shadow:0 8px 22px rgba(214,106,24,.30);
  position:relative;overflow:hidden;
}
.btn-primary::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 30% 20%,rgba(255,255,255,.5),transparent 55%);
  opacity:0;transition:opacity .3s ease;
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(214,106,24,.42);color:#fff}
.btn-primary:hover::after{opacity:1}
.btn-ghost{background:#fff;border:1px solid #D7DEEA;color:var(--ink)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent-deep);transform:translateY(-1px)}
.btn-lg{padding:16px 32px;font-size:16px}
.btn-sm{padding:10px 18px;font-size:14px}

/* ---------- hero (深色) ---------- */
.hero{
  position:relative;
  padding:96px 0 86px;
  background:
    radial-gradient(560px 320px at 88% -10%,rgba(56,198,232,.18),transparent 60%),
    radial-gradient(640px 360px at -10% 40%,rgba(255,138,60,.16),transparent 55%),
    linear-gradient(180deg,#0A1828 0%,#11263F 55%,#0F2540 100%);
  color:#fff;
  overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:42px 42px;
  mask-image:radial-gradient(ellipse at 50% 30%,#000 40%,transparent 80%);
  -webkit-mask-image:radial-gradient(ellipse at 50% 30%,#000 40%,transparent 80%);
}
.hero-grid{
  position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center;
}
@media(max-width:880px){.hero-grid{grid-template-columns:1fr;gap:36px}}
.hero h1{color:#fff;margin-bottom:18px}
.hero h1 .hl{
  background:linear-gradient(120deg,#FF8A3C 0%,#F5C451 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  padding-right:6px;
}
.hero h1 .ac{
  color:var(--cyan);
}
.hero .lead{font-size:17px;max-width:560px;color:rgba(234,243,252,.85)}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}
.hero-meta{
  margin-top:36px;display:flex;flex-wrap:wrap;gap:18px 28px;
  color:rgba(174,196,222,.85);font-size:14px;
}
.hero-meta b{color:#fff;font-weight:600;margin-left:4px}
.hero-visual{
  position:relative;display:flex;justify-content:center;align-items:center;min-height:540px;
}
.phone{
  width:300px;border-radius:42px;background:#0A1828;box-shadow:var(--shadow-lg);
  border:1px solid var(--line);
  overflow:hidden;
  transform:rotate(2deg);
  transition:transform .4s ease;
}
.phone:hover{transform:rotate(0) translateY(-4px)}
.phone img{width:100%;height:auto;display:block}
.float{
  position:absolute;background:#fff;color:var(--ink);border-radius:18px;padding:14px 18px;
  box-shadow:var(--shadow-md);display:flex;align-items:center;gap:12px;
  font-size:13px;font-weight:500;
}
.float .ic{width:36px;height:36px;border-radius:12px;display:grid;place-items:center;color:#fff}
.float.f1{top:30px;left:0}
.float.f2{bottom:60px;right:0}
.float.f1 .ic{background:var(--accent)}
.float.f2 .ic{background:var(--cyan-deep)}

/* ---------- badges ---------- */
.badges{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;
  background:rgba(255,255,255,.08);color:#fff;font-size:13px;font-weight:500;
  border:1px solid rgba(255,255,255,.14);
}
.badge .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(255,138,60,.18)}
.badge.b-cy .dot{background:var(--cyan);box-shadow:0 0 0 4px rgba(56,198,232,.18)}
.badge.b-gn .dot{background:var(--green);box-shadow:0 0 0 4px rgba(55,214,122,.18)}

/* ---------- sections common ---------- */
.section-head{text-align:center;max-width:700px;margin:0 auto 48px}
.section-head .eyebrow{
  display:inline-block;padding:6px 14px;border-radius:999px;
  background:var(--accent-soft);color:var(--accent-deep);font-size:13px;font-weight:600;letter-spacing:.06em;
  margin-bottom:14px;
}
.section-head p{font-size:16px;color:var(--ink-soft);margin-top:6px}

/* ---------- stats ---------- */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:40px;
}
@media(max-width:780px){.stats{grid-template-columns:repeat(2,1fr)}}
.stat{
  background:#fff;border-radius:var(--radius);padding:24px 18px;
  border:1px solid #E2E7F0;text-align:center;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.stat:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#D5E0F0}
.stat .num{
  font-family:var(--font-display);font-size:30px;font-weight:700;color:var(--navy);
}
.stat .lbl{font-size:13px;color:var(--muted);margin-top:6px;letter-spacing:.04em}

/* ---------- feature cards ---------- */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media(max-width:880px){.features-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.features-grid{grid-template-columns:1fr}}
.fcard{
  background:#fff;border-radius:var(--radius);padding:26px 24px;border:1px solid #E2E7F0;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
  position:relative;
}
.fcard:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:#C9D6EC}
.fcard .ic{
  width:48px;height:48px;border-radius:14px;display:grid;place-items:center;
  background:var(--accent-soft);color:var(--accent-deep);margin-bottom:16px;
  transition:background .3s ease,color .3s ease;
}
.fcard:hover .ic{background:linear-gradient(135deg,var(--accent),var(--accent-deep));color:#fff}
.fcard h3{font-size:18px;margin-bottom:8px}
.fcard p{font-size:14px;color:var(--ink-soft);margin:0}
.fcard .tag{
  display:inline-block;margin-top:12px;font-size:12px;color:var(--cyan-deep);
  font-weight:600;letter-spacing:.04em;
}

/* ---------- screenshots ---------- */
.shots{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
@media(max-width:980px){.shots{grid-template-columns:repeat(3,1fr)}}
@media(max-width:560px){.shots{grid-template-columns:repeat(2,1fr)}}
.shot{
  background:#0A1828;border-radius:var(--radius);padding:14px;border:1px solid var(--line);
  text-align:center;transition:transform .3s ease;
}
.shot:hover{transform:translateY(-4px)}
.shot img{width:100%;height:auto;border-radius:8px;display:block}
.shot figcaption{margin-top:10px;font-size:13px;color:#B9C5D4}

/* ---------- user quotes ---------- */
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:880px){.quotes{grid-template-columns:1fr}}
.quote-card{
  background:#fff;border-radius:var(--radius);padding:24px 26px;border:1px solid #E2E7F0;
  position:relative;
}
.quote-card::before{
  content:"\201C";position:absolute;top:-6px;left:14px;
  font-family:Georgia,serif;font-size:60px;color:var(--accent);opacity:.55;line-height:1;
}
.quote-card blockquote{font-size:15px;color:var(--ink);line-height:1.75;margin:0 0 14px}
.quote-meta{display:flex;align-items:center;gap:10px}
.quote-meta .av{
  width:38px;height:38px;border-radius:50%;display:grid;place-items:center;
  font-family:var(--font-display);font-weight:700;color:#fff;font-size:14px;
}
.quote-meta .av.r1{background:var(--accent)}
.quote-meta .av.r2{background:var(--cyan-deep)}
.quote-meta .av.r3{background:var(--navy)}
.quote-meta .av.r4{background:var(--green-deep)}
.quote-meta .who{font-size:13px;color:var(--muted)}
.quote-meta .who b{color:var(--ink);font-weight:600;display:block;font-size:14px;margin-bottom:1px}

/* ---------- deep cards (inner pages) ---------- */
.deep-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media(max-width:880px){.deep-grid{grid-template-columns:1fr}}
.deep-card{
  background:#fff;border-radius:var(--radius);padding:28px;border:1px solid #E2E7F0;
  position:relative;display:block;color:inherit;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
  overflow:hidden;
}
.deep-card::after{
  content:"";position:absolute;right:-30px;top:-30px;width:140px;height:140px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,138,60,.10),transparent 70%);
}
.deep-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:#C9D6EC;color:var(--ink)}
.deep-card .badge-t{
  display:inline-block;padding:4px 10px;border-radius:999px;
  background:var(--accent-soft);color:var(--accent-deep);font-size:12px;font-weight:600;letter-spacing:.04em;
  margin-bottom:14px;
}
.deep-card h3{margin-bottom:8px}
.deep-card p{font-size:14px;color:var(--ink-soft);margin-bottom:14px}
.deep-card .more{
  display:inline-flex;align-items:center;gap:6px;color:var(--accent-deep);font-weight:600;
}
.deep-card:hover .more{color:var(--accent)}
.deep-card .ic{
  width:46px;height:46px;border-radius:12px;display:grid;place-items:center;
  background:var(--bg-soft);color:var(--navy);margin-bottom:14px;
}

/* ---------- FAQ accordion ---------- */
.faq-list{display:grid;gap:14px}
.faq-item{
  background:#fff;border-radius:var(--radius);border:1px solid #E2E7F0;
  overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item.open{border-color:var(--accent);box-shadow:var(--shadow-sm)}
.faq-q{
  width:100%;text-align:left;background:transparent;border:0;padding:18px 22px;
  display:flex;justify-content:space-between;align-items:center;gap:14px;
  font-size:15px;color:var(--ink);font-weight:600;cursor:pointer;
  font-family:inherit;
}
.faq-q .plus{font-size:22px;color:var(--accent);transition:transform .25s ease;display:inline-block}
.faq-item.open .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a-inner{padding:0 22px 22px;color:var(--ink-soft);font-size:14.5px;line-height:1.85}
.faq-item.open .faq-a{max-height:900px}
.faq-a-inner p:last-child{margin-bottom:0}
.faq-tag{
  display:inline-block;padding:2px 8px;border-radius:6px;background:var(--cyan-soft);
  color:var(--cyan-deep);font-size:12px;font-weight:600;margin-right:8px;letter-spacing:.04em;
}

/* ---------- FAQ categories (for faq page) ---------- */
.faq-cat{margin-bottom:34px}
.faq-cat h2{font-size:22px;color:var(--ink);margin-bottom:14px;
  display:flex;align-items:center;gap:10px}
.faq-cat h2 .num{
  display:inline-grid;place-items:center;width:30px;height:30px;border-radius:8px;
  background:var(--navy);color:#fff;font-size:14px;font-family:var(--font-mono);
}

/* ---------- bottom CTA band ---------- */
.cta-band{
  background:
    radial-gradient(400px 200px at 80% 30%,rgba(56,198,232,.18),transparent 70%),
    linear-gradient(135deg,var(--navy) 0%,#112D52 100%);
  color:#fff;border-radius:var(--radius-xl);padding:54px 60px;position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:32px 32px;
  mask-image:radial-gradient(circle at 30% 50%,#000 40%,transparent 80%);
  -webkit-mask-image:radial-gradient(circle at 30% 50%,#000 40%,transparent 80%);
}
.cta-band-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:32px;align-items:center;position:relative}
@media(max-width:780px){.cta-band{padding:40px 30px}.cta-band-grid{grid-template-columns:1fr}}
.cta-band h2{color:#fff;margin-bottom:10px}
.cta-band p{color:rgba(255,255,255,.86);margin-bottom:0}
.cta-band .btn{background:var(--accent);color:#fff;font-weight:700;box-shadow:0 10px 28px rgba(214,106,24,.42);justify-self:end}
.cta-band .btn:hover{background:var(--accent-deep);color:#fff}

/* ---------- footer ---------- */
.footer{
  background:linear-gradient(180deg,#0A1828 0%,#07121F 100%);
  color:#B9C5D4;padding:64px 0 30px;margin-top:30px;
}
.footer-grid{
  max-width:var(--maxw);margin:0 auto;padding:0 22px;
  display:grid;grid-template-columns:1.4fr .9fr .9fr .9fr;gap:36px;
}
@media(max-width:880px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.footer-grid{grid-template-columns:1fr}}
.footer .brand img{height:42px;margin-bottom:14px;background:#fff;border-radius:10px;padding:6px 10px}
.footer .brand p{font-size:14px;color:#9AABBF;max-width:360px;line-height:1.75}
.footer h4{font-size:14px;color:#fff;margin-bottom:14px;font-weight:600;letter-spacing:.04em}
.footer ul{list-style:none;margin:0;padding:0}
.footer li{margin-bottom:6px}
.footer li a{color:#B9C5D4;font-size:14px}
.footer li a:hover{color:var(--accent)}
.footer-bottom{
  max-width:var(--maxw);margin:36px auto 0;padding:18px 22px 0;
  border-top:1px solid #1A2C44;
  display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;
  color:#6F8298;font-size:13px;
}
.disclaimer{
  max-width:var(--maxw);margin:14px auto 0;padding:0 22px;
  color:#6F8298;font-size:12.5px;line-height:1.75;
}

/* ---------- inner page hero (page-head) ---------- */
.page-head{
  position:relative;
  background:
    radial-gradient(620px 320px at 88% -10%,rgba(255,138,60,.14),transparent 60%),
    radial-gradient(560px 300px at -10% 30%,rgba(56,198,232,.12),transparent 55%),
    linear-gradient(180deg,#F7F9FD 0%,#ECEFF5 100%);
  padding:60px 0 36px;
  overflow:hidden;
}
.page-head::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:
    linear-gradient(rgba(14,32,55,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(14,32,55,.05) 1px,transparent 1px);
  background-size:36px 36px;
  mask-image:radial-gradient(ellipse at 50% 30%,#000 50%,transparent 80%);
  -webkit-mask-image:radial-gradient(ellipse at 50% 30%,#000 50%,transparent 80%);
}
.page-head .wrap{position:relative}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:12px}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--accent-deep)}
.page-head h1{margin-bottom:10px}
.page-head h1 .ac{color:var(--accent-deep)}
.page-head .lead{font-size:16.5px;color:var(--ink-soft);max-width:780px;margin:0}
.page-meta{margin-top:18px;display:flex;gap:18px;flex-wrap:wrap;color:var(--muted);font-size:13px}
.page-meta b{color:var(--ink);font-weight:600;margin-left:4px}
.toc{
  margin-top:28px;background:#fff;border:1px solid #E2E7F0;border-radius:var(--radius);
  padding:18px 22px;max-width:860px;
}
.toc h4{font-size:14px;margin-bottom:10px;letter-spacing:.04em;color:var(--ink-soft);font-weight:600}
.toc ol{margin:0 0 0 18px}
.toc a{color:var(--accent-deep);font-size:14.5px}
.toc a:hover{color:var(--accent)}

/* ---------- article ---------- */
.article{max-width:860px;margin:0 auto;padding:30px 22px 0}
.article p{font-size:16px;color:var(--ink);line-height:1.88;margin-bottom:18px}
.article h2{margin-top:46px;font-size:22px;color:var(--ink);position:relative;padding-left:14px}
.article h2::before{
  content:"";position:absolute;left:0;top:8px;width:5px;height:24px;
  background:linear-gradient(180deg,var(--accent),var(--accent-deep));border-radius:3px;
}
.article h3{margin-top:28px;font-size:18px;color:var(--ink);position:relative;padding-left:12px}
.article h3::before{
  content:"";position:absolute;left:0;top:8px;width:4px;height:18px;
  background:var(--cyan-deep);border-radius:2px;
}
.article ol,.article ul{margin:8px 0 18px 22px;color:var(--ink)}
.article li{margin-bottom:8px;line-height:1.85}
.article blockquote{
  border-left:4px solid var(--accent);
  background:#FFF6EC;padding:14px 18px;border-radius:0 12px 12px 0;
  color:var(--ink);margin:18px 0;
}
.article blockquote p:last-child{margin-bottom:0}
.callout{
  background:var(--bg-soft);border:1px dashed #C9D6EC;border-radius:var(--radius);
  padding:16px 20px;margin:18px 0;color:var(--ink-soft);
}
.callout b{color:var(--accent-deep)}
.callout code{background:#fff}
.callout.warn{border-color:#F3C7A6;background:#FFF1E4}
.callout.warn b{color:#B85516}
.callout.tip{border-color:#A8DDEF;background:#EAF6FB}
.callout.tip b{color:var(--cyan-deep)}

.step-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:24px 0}
@media(max-width:780px){.step-grid{grid-template-columns:1fr}}
.step{
  background:#fff;border:1px solid #E2E7F0;border-radius:var(--radius);padding:20px;
  position:relative;
}
.step .num{
  width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent-deep));color:#fff;
  display:grid;place-items:center;font-weight:700;font-size:14px;margin-bottom:12px;
  font-family:var(--font-display);
}
.step h4{font-size:15px;margin-bottom:6px}
.step p{font-size:14px;color:var(--ink-soft);margin:0}
.step ul{margin:8px 0 0 18px}

.kbd{
  display:inline-block;padding:2px 8px;border-radius:6px;
  background:#fff;border:1px solid #C9D6EC;box-shadow:0 1px 0 #C9D6EC;
  font-family:var(--font-mono);font-size:13px;color:var(--ink);
}

.command-table,.compat-table{
  width:100%;border-collapse:collapse;margin:18px 0;background:#fff;
  border:1px solid #E2E7F0;border-radius:var(--radius);overflow:hidden;
  font-size:14px;
}
.command-table th,.compat-table th{
  background:var(--navy);color:#fff;text-align:left;padding:12px 14px;font-weight:600;
  font-size:13px;letter-spacing:.04em;
}
.command-table td,.compat-table td{padding:12px 14px;border-top:1px solid #E2E7F0;color:var(--ink);vertical-align:top}
.command-table tr:nth-child(even) td,.compat-table tr:nth-child(even) td{background:#F7F9FD}
.command-table code{background:transparent;border:0;padding:0;color:var(--accent-deep);font-weight:600}
.command-table .desc{color:var(--ink-soft)}
.command-table .level{font-size:12px;padding:2px 8px;border-radius:6px;font-weight:600}
.command-table .level.ok{background:var(--green-soft);color:var(--green-deep)}
.command-table .level.cau{background:#FFE7D2;color:#B85516}
.command-table .level.dng{background:#FFDCDE;color:#C0392B}

.scenario-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:24px 0}
@media(max-width:780px){.scenario-grid{grid-template-columns:1fr}}
.scenario{
  background:#fff;border:1px solid #E2E7F0;border-radius:var(--radius);padding:22px;
  position:relative;
}
.scenario h4{margin-bottom:8px;display:flex;align-items:center;gap:10px}
.scenario h4 .ic{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:var(--accent-soft);color:var(--accent-deep);
}
.scenario p{font-size:14.5px;color:var(--ink-soft);margin:0}

.feature-deep{
  background:#fff;border:1px solid #E2E7F0;border-radius:var(--radius-lg);
  padding:30px;margin:24px 0;
  display:grid;grid-template-columns:1fr 280px;gap:30px;align-items:start;
}
@media(max-width:780px){.feature-deep{grid-template-columns:1fr}}
.feature-deep h3{margin-top:0;font-size:20px;display:flex;align-items:center;gap:10px}
.feature-deep .ic{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--accent),var(--accent-deep));color:#fff;
}
.feature-deep p,.feature-deep li{font-size:15px;color:var(--ink);line-height:1.85}
.feature-deep .demo{
  background:#0A1828;border-radius:14px;overflow:hidden;border:1px solid var(--line);
}
.feature-deep .demo img{width:100%;display:block}
.feature-deep .demo figcaption{color:#B9C5D4;font-size:12px;padding:8px 12px;text-align:center}

.rel-links{
  margin-top:40px;background:var(--bg-soft);border-radius:var(--radius);padding:22px 26px;
  border:1px dashed #C9D6EC;
}
.rel-links h4{margin-bottom:12px}
.rel-links ul{margin-left:18px;margin-bottom:0}
.rel-links a{color:var(--accent-deep)}
.rel-links a:hover{color:var(--accent)}

.bignum{
  display:inline-grid;place-items:center;width:48px;height:48px;border-radius:14px;
  background:var(--accent);color:#fff;font-family:var(--font-display);font-weight:700;font-size:22px;
  margin-right:12px;vertical-align:middle;
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- back-to-top ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;
  background:#fff;border:1px solid #E2E7F0;color:var(--accent-deep);cursor:pointer;
  display:none;align-items:center;justify-content:center;
  box-shadow:var(--shadow-md);transition:opacity .25s ease,transform .25s ease;
  z-index:40;
}
.to-top.show{display:flex}
.to-top:hover{transform:translateY(-3px);background:var(--accent);color:#fff;border-color:var(--accent)}