/* Mewbyt — stylesheet */

:root{
  --bg:#f5f5f1;
  --card:#ffffff;
  --ink:#21252e;
  --ink-2:#3a4150;
  --muted:#69707e;
  --line:#e5e6e3;
  --brand:#4753c8;
  --brand-dark:#333d99;
  --brand-tint:#eef0fb;
  --amber:#f0a832;
  --amber-tint:#fdf3e0;
  --green:#2e9e6b;
  --green-tint:#e8f5ee;
  --teal:#0d8f94;
  --teal-tint:#e4f3f4;
  --rose:#c0455c;
  --rose-tint:#faeaed;
  --radius:14px;
  --shadow:0 1px 3px rgba(30,34,48,.08),0 1px 2px rgba(30,34,48,.05);
  --shadow-lift:0 10px 28px rgba(30,34,48,.13);
  --font-sans:"Nunito","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:0.01ms !important;animation-duration:0.01ms !important;animation-iteration-count:1 !important}
}
body{
  font-family:var(--font-sans);
  background:var(--bg);
  color:var(--ink);
  font-size:16px;
  line-height:1.85;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-dark)}

.wrap{max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{
  background:var(--card);
  border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:60;
}
.header-in{
  max-width:1200px;margin:0 auto;padding:0 24px;
  display:flex;align-items:center;gap:28px;min-height:64px;
}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:22px;color:var(--ink);letter-spacing:.2px}
.logo:hover{color:var(--ink)}
.logo svg{width:30px;height:30px;flex:0 0 auto}
.logo .logo-bit{color:var(--brand)}

.nav-toggle{
  display:none;margin-left:auto;
  width:44px;height:44px;border:1px solid var(--line);border-radius:10px;
  background:var(--card);cursor:pointer;align-items:center;justify-content:center;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  display:block;width:18px;height:2px;background:var(--ink);position:relative;border-radius:2px;
}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

.site-nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.site-nav>ul{display:flex;list-style:none;align-items:center;gap:2px}
.site-nav li{position:relative}
.site-nav a.nav-link,.site-nav button.nav-link{
  display:flex;align-items:center;gap:5px;
  padding:10px 13px;border:0;background:none;cursor:pointer;
  font:inherit;font-size:15px;font-weight:600;color:var(--ink-2);border-radius:9px;
}
.site-nav a.nav-link:hover,.site-nav button.nav-link:hover{background:var(--brand-tint);color:var(--brand-dark)}
.caret{width:9px;height:9px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg) translateY(-2px)}

.dropdown{
  position:absolute;top:100%;left:0;min-width:250px;
  background:var(--card);border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--shadow-lift);padding:9px;list-style:none;
  opacity:0;visibility:hidden;transform:translateY(6px);
  transition:opacity .14s ease,transform .14s ease,visibility .14s;
}
@media(hover:hover) and (min-width:861px){
  li.has-dropdown:hover>.dropdown{opacity:1;visibility:visible;transform:translateY(0)}
}
li.has-dropdown.open>.dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown a{
  display:block;padding:9px 12px;border-radius:8px;
  font-size:14.5px;color:var(--ink-2);line-height:1.5;
}
.dropdown a:hover{background:var(--brand-tint);color:var(--brand-dark)}
.dropdown .dd-all a{color:var(--brand);font-weight:700}

.lang-switch .globe{width:15px;height:15px;flex:0 0 auto}
.lang-switch .dropdown{min-width:140px;left:auto;right:0}
.lang-switch .lang-current{
  display:block;padding:9px 12px;font-size:14.5px;color:var(--muted);cursor:default;
}
.lang-switch .lang-current::after{content:"\2713";margin-left:8px;color:var(--green)}

.nav-cta{
  margin-left:10px;
  display:inline-flex;align-items:center;
  background:var(--brand);color:#fff;font-weight:700;font-size:15px;
  padding:10px 18px;border-radius:11px;white-space:nowrap;
}
.nav-cta:hover{background:var(--brand-dark);color:#fff}

/* ---------- hero ---------- */
.hero{
  background:linear-gradient(160deg,#e9ebfa 0%,#f2f0e9 100%);
  border-bottom:1px solid var(--line);
}
.hero-in{
  max-width:1200px;margin:0 auto;padding:44px 24px 48px;
  display:grid;grid-template-columns:minmax(0,1fr) 400px;gap:44px;align-items:center;
}
.hero h1{font-size:34px;line-height:1.35;letter-spacing:.3px}
.hero .hero-sub{margin-top:14px;font-size:16.5px;color:var(--ink-2);max-width:560px}
.hero .hero-sub strong{color:var(--brand-dark)}
.hero-points{margin-top:18px;list-style:none;display:flex;flex-wrap:wrap;gap:8px 18px}
.hero-points li{font-size:14.5px;color:var(--muted);display:flex;align-items:center;gap:7px}
.hero-points li::before{
  content:"";width:7px;height:7px;border-radius:50%;background:var(--amber);flex:0 0 auto;
}

/* conversion card */
.conv-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-lift);padding:24px 24px 18px;
}
.conv-card .conv-title{font-size:17px;font-weight:800}
.conv-card .conv-desc{font-size:14px;color:var(--muted);margin-top:4px}
.code-row{
  margin-top:14px;display:flex;gap:10px;align-items:stretch;
}
.code-box{
  flex:1;display:flex;align-items:center;justify-content:center;
  border:2px dashed var(--amber);background:var(--amber-tint);border-radius:11px;
  font-size:21px;font-weight:800;letter-spacing:2.5px;color:#9a6410;
  padding:9px 8px;min-height:48px;
}
.copy-btn{
  min-width:74px;min-height:48px;border:1px solid var(--line);border-radius:11px;
  background:var(--card);font:inherit;font-size:14.5px;font-weight:700;color:var(--ink-2);
  cursor:pointer;padding:0 14px;
}
.copy-btn:hover{border-color:var(--brand);color:var(--brand)}
.copy-btn.copied{background:var(--green-tint);border-color:var(--green);color:var(--green)}
.conv-cta{
  margin-top:12px;display:flex;align-items:center;justify-content:center;
  width:100%;min-height:50px;background:var(--brand);color:#fff;
  font-size:16.5px;font-weight:800;border-radius:12px;letter-spacing:.5px;
}
.conv-cta:hover{background:var(--brand-dark);color:#fff}
.conv-benefit{margin-top:12px;font-size:14.5px;color:var(--ink-2);text-align:center}
.conv-benefit strong{color:var(--rose)}
.conv-note{margin-top:6px;font-size:12px;color:var(--muted);text-align:center;line-height:1.6}

/* ---------- layout ---------- */
.layout{
  max-width:1200px;margin:0 auto;padding:40px 24px 24px;
  display:grid;grid-template-columns:minmax(0,1fr) 336px;gap:44px;align-items:start;
}
.main-col{min-width:0}
.sidebar{position:sticky;top:84px;display:flex;flex-direction:column;gap:26px}

.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:14px;margin:6px 0 18px}
.sec-head h2{font-size:22px;letter-spacing:.3px;display:flex;align-items:center;gap:10px}
.sec-head h2::before{content:"";width:5px;height:22px;border-radius:3px;background:var(--brand)}
.sec-head .see-all{font-size:14px;font-weight:700;white-space:nowrap}
.sec-head.tone-dep h2::before{background:var(--green)}
.sec-head.tone-trade h2::before{background:var(--amber)}
.sec-head.tone-earn h2::before{background:var(--teal)}
.sec-head.tone-safe h2::before{background:var(--rose)}
.home-sec{margin-bottom:38px}

/* entry cards */
.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.entry-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column;
  transition:transform .15s ease,box-shadow .15s ease;
}
.entry-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lift)}
.entry-card .thumb{aspect-ratio:1200/630;overflow:hidden;background:var(--brand-tint)}
.entry-card .thumb img{width:100%;height:100%;object-fit:cover}
.entry-card .card-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:8px;flex:1}
.chip{
  align-self:flex-start;font-size:12px;font-weight:800;letter-spacing:.5px;
  padding:3px 10px;border-radius:99px;background:var(--brand-tint);color:var(--brand-dark);
}
.chip.dep{background:var(--green-tint);color:var(--green)}
.chip.trade{background:var(--amber-tint);color:#9a6410}
.chip.earn{background:var(--teal-tint);color:var(--teal)}
.chip.safe{background:var(--rose-tint);color:var(--rose)}
.entry-card h3{font-size:17.5px;line-height:1.5}
.entry-card h3 a{color:var(--ink)}
.entry-card h3 a:hover{color:var(--brand)}
.entry-card .excerpt{
  font-size:14px;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.entry-card .meta{margin-top:auto;padding-top:6px;font-size:13px;color:var(--muted);display:flex;gap:14px}

.feature-card{grid-column:1 / -1;flex-direction:row;align-items:center}
.feature-card .thumb{flex:0 0 46%;aspect-ratio:1200/630}
.feature-card h3{font-size:21px}
.feature-card .excerpt{-webkit-line-clamp:3}

/* ---------- sidebar widgets ---------- */
.widget{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:20px 20px 16px;
}
.widget>h2{font-size:16.5px;padding-bottom:10px;border-bottom:1px solid var(--line);margin-bottom:12px;display:flex;align-items:center;gap:8px}
.widget>h2::before{content:"";width:4px;height:16px;border-radius:2px;background:var(--amber)}
.widget ul{list-style:none}
.widget .post-list li{padding:8px 0;border-bottom:1px dashed var(--line);font-size:14.5px;line-height:1.6}
.widget .post-list li:last-child{border-bottom:0}
.widget .post-list a{color:var(--ink-2);display:block;padding:2px 0}
.widget .post-list a:hover{color:var(--brand)}
.widget .post-list .d{display:block;font-size:12.5px;color:var(--muted)}
.widget p{font-size:14px;color:var(--ink-2)}
.widget .more{display:inline-block;margin-top:8px;font-size:14px;font-weight:700}
.sidebar .conv-card{padding:20px 20px 14px}
.sidebar .conv-card .code-box{font-size:18px}

/* ---------- link hub ---------- */
.link-hub{border-top:1px solid var(--line);background:#efefe9}
.link-hub-in{max-width:1200px;margin:0 auto;padding:36px 24px 30px}
.link-hub h2{font-size:19px;margin-bottom:20px}
.hub-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px 28px}
.hub-col h3{font-size:14.5px;margin-bottom:9px;color:var(--ink)}
.hub-col ul{list-style:none}
.hub-col li{margin:5px 0}
.hub-col a{font-size:13.5px;color:var(--muted);line-height:1.55;display:inline-block;padding:2px 0}
.hub-col a:hover{color:var(--brand)}

/* ---------- footer ---------- */
.site-footer{background:#252838;color:#c6c9d8}
.footer-in{max-width:1200px;margin:0 auto;padding:38px 24px 26px}
.footer-top{display:flex;flex-wrap:wrap;gap:26px;justify-content:space-between;align-items:flex-start}
.footer-brand{max-width:420px}
.footer-brand .logo{color:#fff;font-size:20px}
.footer-brand .logo .logo-bit{color:#98a2f5}
.footer-brand p{margin-top:10px;font-size:13.5px;color:#9ba0b6;line-height:1.75}
.footer-links{display:flex;gap:44px;flex-wrap:wrap}
.footer-links h3{font-size:14px;color:#fff;margin-bottom:10px}
.footer-links ul{list-style:none}
.footer-links li{margin:6px 0}
.footer-links a{color:#9ba0b6;font-size:13.5px}
.footer-links a:hover{color:#fff}
.footer-bottom{
  margin-top:26px;padding-top:16px;border-top:1px solid #3a3e52;
  font-size:12.5px;color:#9ea4ba;line-height:1.8;
}

/* ---------- article ---------- */
.breadcrumb{font-size:13.5px;color:var(--muted);margin-bottom:14px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb span{margin:0 6px;color:#b8bcc6}

.article{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:34px 40px 38px;min-width:0;
}
.article-head h1{font-size:29px;line-height:1.45;letter-spacing:.2px}
.article-meta{
  margin-top:12px;display:flex;flex-wrap:wrap;gap:8px 18px;
  font-size:13.5px;color:var(--muted);align-items:center;
}
.article-cover{margin:20px 0 6px}
.article-cover img{border-radius:11px;width:100%}

.toc{
  margin:24px 0;background:var(--brand-tint);border:1px solid #dcdff5;
  border-radius:12px;padding:18px 22px;
}
.toc h2{font-size:16px;margin-bottom:8px}
.toc ol{padding-left:20px;font-size:14.5px;columns:2;column-gap:34px}
.toc li{margin:4px 0;break-inside:avoid}
.toc a{color:var(--ink-2)}
.toc a:hover{color:var(--brand)}

.article-body{font-size:16px}
.article-body>h2{
  font-size:23px;margin:38px 0 14px;padding-top:10px;line-height:1.5;
  border-top:1px solid var(--line);scroll-margin-top:84px;
}
.article-body>h2:first-of-type{border-top:0;padding-top:0}
.article-body h3{font-size:18.5px;margin:26px 0 10px;scroll-margin-top:84px}
.article-body p{margin:13px 0}
.article-body ul,.article-body ol{margin:13px 0;padding-left:26px}
.article-body li{margin:6px 0}
.article-body strong{color:var(--ink)}
.article-body table{
  width:100%;border-collapse:collapse;margin:18px 0;font-size:14.5px;line-height:1.65;
}
.article-body th,.article-body td{border:1px solid var(--line);padding:9px 12px;text-align:left;vertical-align:top}
.article-body th{background:#f6f7fb;font-weight:700}
.article-body tr:nth-child(even) td{background:#fafaf8}
.table-scroll{overflow-x:auto}

.article-shot{margin:20px 0}
.article-shot img{
  width:100%;border:1px solid var(--line);border-radius:10px;
  box-shadow:0 2px 10px rgba(30,34,48,.07);
}
.article-shot figcaption{margin-top:8px;font-size:13px;color:var(--muted);text-align:center}

.tip-box,.warn-box{
  margin:18px 0;padding:14px 18px;border-radius:11px;font-size:15px;
}
.tip-box{background:var(--green-tint);border:1px solid #cfe9dc}
.warn-box{background:var(--rose-tint);border:1px solid #f0d3d9}
.tip-box .box-t,.warn-box .box-t{font-weight:800;display:block;margin-bottom:3px}
.tip-box .box-t{color:var(--green)}
.warn-box .box-t{color:var(--rose)}

.article-body .faq-item{border:1px solid var(--line);border-radius:11px;margin:12px 0;overflow:hidden}
.faq-item summary{
  cursor:pointer;padding:13px 18px;font-weight:700;font-size:15.5px;
  background:#f8f8f5;list-style:none;position:relative;padding-right:40px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";position:absolute;right:16px;top:50%;transform:translateY(-50%);
  font-size:20px;color:var(--muted);font-weight:400;
}
.faq-item[open] summary::after{content:"−"}
.faq-item .faq-a{padding:4px 18px 14px;font-size:15px}

/* in-article register card */
.reg-cta{
  margin:30px 0;border:1px solid #dcdff5;background:linear-gradient(150deg,#eef0fb,#fdf6e8);
  border-radius:var(--radius);padding:22px 26px;
}
.reg-cta .rc-t{font-size:17.5px;font-weight:800}
.reg-cta .rc-d{font-size:14.5px;color:var(--ink-2);margin-top:5px}
.reg-cta .code-row{max-width:420px}
.reg-cta .conv-cta{max-width:420px}
.reg-cta .conv-note{text-align:left}

.author-box{
  margin-top:34px;padding:20px 24px;border:1px solid var(--line);border-radius:var(--radius);
  background:#fafaf7;display:flex;gap:18px;align-items:flex-start;
}
.author-box .avatar{
  flex:0 0 56px;width:56px;height:56px;border-radius:50%;
  background:var(--brand);color:#fff;font-size:22px;font-weight:800;
  display:flex;align-items:center;justify-content:center;
}
.author-box .a-name{font-weight:800;font-size:15.5px}
.author-box p{font-size:14px;color:var(--muted);margin-top:4px;line-height:1.7}

.related{margin-top:34px}
.related h2{font-size:20px;margin-bottom:16px}
.related .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}

/* ---------- guides / tools index ---------- */
.page-head{margin:8px 0 26px}
.page-head h1{font-size:30px}
.page-head p{margin-top:8px;color:var(--muted);font-size:15.5px;max-width:640px}
.group-block{margin-bottom:36px}
.group-block>h2{font-size:21px;margin-bottom:16px;display:flex;align-items:center;gap:10px}
.group-block>h2::before{content:"";width:5px;height:20px;border-radius:3px;background:var(--brand)}
.group-block.tone-dep>h2::before{background:var(--green)}
.group-block.tone-trade>h2::before{background:var(--amber)}
.group-block.tone-earn>h2::before{background:var(--teal)}
.group-block.tone-safe>h2::before{background:var(--rose)}
.list-rows{list-style:none}
.list-rows li{
  background:var(--card);border:1px solid var(--line);border-radius:12px;
  padding:14px 18px;margin:10px 0;box-shadow:var(--shadow);
}
.list-rows .row-t{font-size:16px;font-weight:700;line-height:1.55}
.list-rows .row-t a{color:var(--ink)}
.list-rows .row-t a:hover{color:var(--brand)}
.list-rows .row-d{font-size:13.5px;color:var(--muted);margin-top:3px}

/* ---------- tools ---------- */
.tool-panel{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:26px 30px;margin:20px 0;
}
.tool-panel h2{font-size:19px;margin-bottom:14px}
.field{margin:13px 0}
.field label{display:block;font-size:14px;font-weight:700;margin-bottom:6px;color:var(--ink-2)}
.field input,.field select{
  width:100%;min-height:48px;padding:10px 14px;font:inherit;font-size:16px;
  border:1px solid #d5d7dc;border-radius:10px;background:#fdfdfc;color:var(--ink);
}
.field input:focus,.field select:focus{outline:2px solid var(--brand);border-color:var(--brand)}
.field .hint{font-size:12.5px;color:var(--muted);margin-top:4px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.calc-btn{
  min-height:50px;padding:0 26px;border:0;border-radius:11px;background:var(--brand);
  color:#fff;font:inherit;font-size:16px;font-weight:800;cursor:pointer;margin-top:6px;
}
.calc-btn:hover{background:var(--brand-dark)}
.result-box{
  margin-top:18px;padding:16px 20px;border-radius:11px;background:var(--brand-tint);
  border:1px solid #dcdff5;font-size:15px;line-height:1.9;display:none;
}
.result-box.show{display:block}
.result-box .big{font-size:22px;font-weight:800;color:var(--brand-dark)}
.result-box table{width:100%;border-collapse:collapse;font-size:14px;margin-top:8px}
.result-box th,.result-box td{border:1px solid #d8dbf0;padding:7px 10px;text-align:left}

.layout.single{grid-template-columns:1fr;max-width:900px}

/* ---------- misc ---------- */
.err-page{max-width:640px;margin:70px auto;text-align:center;padding:0 24px}
.err-page h1{font-size:64px;color:var(--brand)}
.err-page p{margin:14px 0 22px;color:var(--muted)}
.skip-link{position:absolute;left:-9999px}
.skip-link:focus{left:12px;top:12px;background:#fff;padding:8px 14px;z-index:99;border-radius:8px}

/* ---------- responsive ---------- */
@media(max-width:1020px){
  .hero-in{grid-template-columns:1fr;gap:26px;padding:34px 24px}
  .layout{grid-template-columns:1fr}
  .sidebar{position:static}
  .hub-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .feature-card{flex-direction:column}
  .feature-card .thumb{flex:none;aspect-ratio:1200/630}
}
@media(max-width:860px){
  .nav-toggle{display:flex}
  .site-nav{
    display:none;position:fixed;inset:64px 0 0 0;background:var(--card);
    overflow-y:auto;padding:14px 20px 40px;margin:0;
  }
  .site-nav.open{display:block}
  .site-nav>ul{flex-direction:column;align-items:stretch;gap:0}
  .site-nav a.nav-link,.site-nav button.nav-link{
    width:100%;justify-content:space-between;padding:14px 10px;font-size:16px;
    border-bottom:1px solid var(--line);border-radius:0;
  }
  .dropdown{
    position:static;opacity:1;visibility:visible;transform:none;display:none;
    box-shadow:none;border:0;border-left:3px solid var(--brand-tint);border-radius:0;
    padding:2px 0 8px 10px;min-width:0;
  }
  li.has-dropdown.open>.dropdown{display:block}
  .dropdown a{padding:11px 10px;font-size:15px}
  .nav-cta{margin:16px 0 0;justify-content:center;width:100%;min-height:48px}
}
@media(max-width:640px){
  .hero-in{display:flex;flex-direction:column;padding:24px 18px 30px;gap:20px}
  .hero .conv-card{order:-1;width:100%}
  .hero h1{font-size:24.5px}
  .hero .hero-sub{font-size:15px;margin-top:10px}
  .hero-points{display:none}
  .wrap,.header-in,.footer-in,.link-hub-in{padding-left:18px;padding-right:18px}
  .layout{padding:26px 18px 18px;gap:30px}
  .card-grid,.related .card-grid{grid-template-columns:1fr;gap:16px}
  .article{padding:22px 18px 26px;border-radius:12px}
  .article-head h1{font-size:22.5px}
  .article-body>h2{font-size:20px}
  .article-body h3{font-size:17px}
  .toc ol{columns:1}
  .hub-grid{grid-template-columns:1fr;gap:18px}
  .field-row{grid-template-columns:1fr}
  .tool-panel{padding:20px 16px}
  .code-box{font-size:18px;letter-spacing:1.5px}
  .footer-top{flex-direction:column;gap:20px}
}