:root{
  --main:#22d3ee;
  --accent:#fb923c;
  --bg:#0f172a;
  --text:#e2e8f0;
  --line:#22d3ee;
  --panel:#16233c;
  --panel-2:#1b2b48;
  --muted:#94a3b8;
  --shadow:6px 6px 0 var(--main);
  --shadow-orange:6px 6px 0 var(--accent);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg);
  color:var(--text);
  font-family:'Inter','Helvetica Neue',Arial,'PingFang SC','Microsoft YaHei',sans-serif;
  font-weight:400;
  line-height:1.85;
  margin:0;
  padding:0;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5{
  font-weight:900;
  letter-spacing:-0.02em;
  line-height:1.25;
  color:#ffffff;
}
a{color:var(--main);text-decoration:none;}
a:hover{color:var(--accent);}
.mono{font-family:'SFMono-Regular',Consolas,'Liberation Mono',Menlo,monospace;}
.container-x{max-width:1180px;margin:0 auto;padding:0 18px;}
section{scroll-margin-top:88px;}

/* ============ NAV ============ */
.top-nav{
  position:sticky;top:0;z-index:1000;
  background:var(--bg);
  border-bottom:3px solid var(--main);
  padding:0;
}
.nav-inner{
  max-width:1180px;margin:0 auto;padding:14px 18px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.brand-link{
  font-weight:900;font-size:1.18rem;color:#fff;letter-spacing:-0.01em;
  display:inline-flex;align-items:center;gap:8px;
  border:3px solid var(--main);padding:6px 14px;background:var(--panel);
  box-shadow:4px 4px 0 var(--main);
}
.brand-link:hover{color:#fff;background:var(--panel-2);}
.brand-link i{color:var(--accent);}
.nav-menu{display:flex;align-items:center;gap:6px;list-style:none;margin:0;padding:0;}
.nav-menu a{
  display:inline-block;padding:7px 13px;color:var(--text);
  font-weight:600;font-size:0.92rem;border:2px solid transparent;
}
.nav-menu a:hover{color:#0f172a;background:var(--main);border-color:var(--main);}
.nav-toggle{
  display:none;background:var(--panel);border:3px solid var(--main);
  color:var(--main);font-size:1.2rem;padding:4px 12px;cursor:pointer;
}
@media(max-width:860px){
  .nav-toggle{display:block;}
  .nav-menu{
    display:none;position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--panel);border-bottom:3px solid var(--main);
    padding:8px 12px 14px;
  }
  .nav-menu.open{display:flex;}
  .nav-menu a{border:2px solid #24375a;margin:4px 0;}
}

/* ============ BUTTONS ============ */
.btn-hard{
  position:relative;overflow:hidden;
  display:inline-flex;align-items:center;gap:9px;
  font-weight:800;font-size:1rem;
  padding:13px 26px;
  border:none;border-radius:0;
  background:var(--main);color:#0f172a;
  box-shadow:6px 6px 0 rgba(251,146,60,0.55);
  transition:transform .18s ease, box-shadow .18s ease;
  cursor:pointer;
}
.btn-hard::after{
  content:"";position:absolute;top:0;left:-120%;width:60%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,0.65),transparent);
  transform:skewX(-20deg);
  transition:left .55s ease;
}
.btn-hard:hover{color:#0f172a;transform:translate(-3px,-3px);box-shadow:9px 9px 0 rgba(251,146,60,0.85);}
.btn-hard:hover::after{left:130%;}
.btn-line{
  display:inline-flex;align-items:center;gap:9px;
  font-weight:800;font-size:1rem;
  padding:13px 26px;border:3px solid var(--accent);
  background:transparent;color:var(--accent);border-radius:0;
  transition:background .2s ease,color .2s ease,transform .18s ease;
  cursor:pointer;
}
.btn-line:hover{background:var(--accent);color:#0f172a;transform:translate(-3px,-3px);}

/* ============ HERO ============ */
.hero{padding:70px 0 60px;position:relative;}
.hero-kicker{
  display:inline-block;border:2px solid var(--main);color:var(--main);
  font-weight:700;font-size:0.8rem;letter-spacing:0.12em;
  padding:5px 12px;margin-bottom:24px;text-transform:uppercase;
}
.hero h1{
  font-size:clamp(2rem,5vw,3.5rem);
  font-weight:900;margin:0 0 22px;max-width:14ch;
}
.hero h1 em{
  font-style:normal;color:var(--main);
}
.hero-sub{
  font-size:1.08rem;color:var(--muted);max-width:60ch;margin-bottom:34px;line-height:1.85;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:18px;}

/* Bento grid */
.bento{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  grid-auto-rows:minmax(110px,auto);
  gap:16px;margin-top:48px;
}
.bento-cell{
  background:var(--panel);border:3px solid var(--main);
  box-shadow:5px 5px 0 rgba(34,211,238,0.35);
  padding:20px 22px;display:flex;flex-direction:column;justify-content:center;
}
.bento-cell h3{
  font-size:1.9rem;font-weight:900;margin:0 0 6px;color:var(--main);
}
.bento-cell h3.mono{font-size:1.75rem;}
.bento-cell p{margin:0;color:var(--muted);font-size:0.92rem;line-height:1.6;}
.bento-cell.accent{border-color:var(--accent);box-shadow:5px 5px 0 rgba(251,146,60,0.35);}
.bento-cell.accent h3{color:var(--accent);}
.cell-wide{grid-column:span 2;}
.cell-tall{grid-row:span 2;justify-content:flex-start;}
.cell-tall h3{margin-top:8px;}
.cell-fill{background:var(--main);border-color:var(--main);box-shadow:5px 5px 0 rgba(251,146,60,0.6);}
.cell-fill h3,.cell-fill p{color:#0f172a;}
.cell-fill h3.mono{color:#0f172a;}
@media(max-width:820px){
  .bento{grid-template-columns:repeat(2,1fr);}
  .cell-wide{grid-column:span 2;}
  .cell-tall{grid-row:span 1;}
}
@media(max-width:520px){
  .bento{grid-template-columns:1fr;}
  .cell-wide{grid-column:span 1;}
}

/* ============ SECTION TITLES ============ */
.sec{padding:66px 0;border-top:3px solid #24375a;}
.sec-head{margin-bottom:40px;}
.sec-label{
  display:inline-block;font-weight:800;font-size:0.78rem;letter-spacing:0.16em;
  color:var(--accent);text-transform:uppercase;margin-bottom:12px;
}
.sec-head h2{font-size:clamp(1.5rem,3.2vw,2.2rem);font-weight:900;margin:0 0 14px;max-width:24ch;}
.sec-head p{color:var(--muted);max-width:66ch;margin:0;}

/* ============ LONG ARTICLE ============ */
.article-body{
  border-left:6px solid var(--main);padding-left:26px;
  max-width:80ch;
}
.article-body p{margin-bottom:1.5rem;font-size:1.02rem;color:#cbd5e1;}
.article-body p strong{color:var(--main);font-weight:700;}
.article-body p em{font-style:normal;color:var(--accent);font-weight:600;}
.pull-quote{
  background:var(--panel);border:3px solid var(--accent);
  box-shadow:6px 6px 0 rgba(251,146,60,0.3);
  padding:22px 26px;margin:2rem 0;
  font-size:1.08rem;font-weight:600;color:#fff;line-height:1.75;
}
@media(max-width:640px){
  .article-body{padding-left:16px;border-left-width:4px;}
}

/* ============ TABLE ============ */
.table-wrap{overflow-x:auto;border:3px solid var(--main);box-shadow:6px 6px 0 rgba(34,211,238,0.3);}
table.cmp{
  width:100%;border-collapse:collapse;min-width:680px;background:var(--panel);
}
table.cmp th,table.cmp td{
  padding:16px 18px;text-align:left;border-bottom:2px solid #24375a;vertical-align:top;
}
table.cmp thead th{
  background:var(--main);color:#0f172a;font-weight:900;font-size:0.98rem;
  border-bottom:3px solid var(--main);
}
table.cmp tbody th{
  background:var(--panel-2);color:var(--main);font-weight:800;font-size:0.92rem;white-space:nowrap;
}
table.cmp tbody tr:hover td{background:#1c2c4a;}
table.cmp td{color:#cbd5e1;font-size:0.95rem;line-height:1.7;}
.tag{
  display:inline-block;font-size:0.75rem;font-weight:800;
  padding:2px 9px;border:2px solid currentColor;margin-right:6px;
}
.tag-ok{color:var(--main);}
.tag-warn{color:var(--accent);}
.tag-no{color:#f87171;}

/* ============ FAQ ACCORDION ============ */
.faq-list{display:flex;flex-direction:column;gap:14px;}
details.faq-item{
  background:var(--panel);border:3px solid #2b4067;
  box-shadow:5px 5px 0 rgba(34,211,238,0.18);
  transition:border-color .2s ease,box-shadow .2s ease;
}
details.faq-item[open]{
  border-color:var(--main);
  box-shadow:5px 5px 0 rgba(34,211,238,0.45);
}
details.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 22px;
  font-weight:800;font-size:1.02rem;color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
details.faq-item summary::-webkit-details-marker{display:none;}
details.faq-item summary::after{
  content:"+";font-size:1.5rem;font-weight:900;color:var(--accent);
  line-height:1;flex-shrink:0;transition:transform .2s ease;
}
details.faq-item[open] summary::after{content:"–";color:var(--main);}
details.faq-item .faq-ans{
  padding:0 22px 20px;color:#cbd5e1;font-size:0.97rem;line-height:1.9;
  border-top:2px solid #24375a;padding-top:16px;margin:0 22px 20px;
  padding-left:0;padding-right:0;
}

/* ============ FEATURES ============ */
.feature-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:18px;
}
.feature-card{
  background:var(--panel);border:3px solid #2b4067;
  padding:26px 24px;box-shadow:5px 5px 0 rgba(34,211,238,0.16);
  transition:transform .18s ease,border-color .2s ease,box-shadow .2s ease;
}
.feature-card:hover{
  transform:translate(-4px,-4px);border-color:var(--main);
  box-shadow:9px 9px 0 rgba(34,211,238,0.4);
}
.feature-icon{
  width:52px;height:52px;display:flex;align-items:center;justify-content:center;
  border:3px solid var(--accent);color:var(--accent);font-size:1.3rem;
  margin-bottom:18px;background:rgba(251,146,60,0.08);
}
.feature-card h3{font-size:1.08rem;font-weight:800;margin:0 0 10px;}
.feature-card p{margin:0;color:var(--muted);font-size:0.94rem;line-height:1.75;}
@media(max-width:860px){.feature-grid{grid-template-columns:repeat(2,1fr);}}
@media(max-width:560px){.feature-grid{grid-template-columns:1fr;}}

/* ============ CTA ============ */
.cta-band{
  background:var(--panel);border:3px solid var(--main);
  box-shadow:8px 8px 0 rgba(251,146,60,0.55);
  padding:52px 40px;text-align:center;
}
.cta-band h2{font-size:clamp(1.5rem,3.4vw,2.3rem);margin:0 0 16px;font-weight:900;}
.cta-band p{color:var(--muted);max-width:56ch;margin:0 auto 32px;}
.cta-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:18px;}
@media(max-width:600px){.cta-band{padding:36px 20px;}}

/* ============ FOOTER ============ */
footer.site-foot{
  border-top:3px solid var(--main);background:#0b1220;
  padding:56px 0 30px;margin-top:20px;
}
.foot-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px;margin-bottom:40px;
}
.foot-brand h4{
  font-size:1.1rem;font-weight:900;margin:0 0 14px;
  display:inline-flex;align-items:center;gap:8px;
}
.foot-brand h4 i{color:var(--accent);}
.foot-brand p{color:var(--muted);font-size:0.92rem;max-width:36ch;margin:0;}
.foot-col h5{
  font-size:0.82rem;letter-spacing:0.14em;text-transform:uppercase;
  color:var(--main);font-weight:800;margin:0 0 16px;
}
.foot-col ul{list-style:none;margin:0;padding:0;}
.foot-col li{margin-bottom:10px;}
.foot-col a{color:#cbd5e1;font-size:0.93rem;font-weight:500;}
.foot-col a:hover{color:var(--accent);}
.friend-links{
  border:3px solid #2b4067;padding:22px 24px;margin-bottom:34px;
  background:var(--panel);
}
.friend-links h5{
  font-size:0.82rem;letter-spacing:0.14em;text-transform:uppercase;
  color:var(--accent);font-weight:800;margin:0 0 14px;
}
.friend-links .fl-body{color:var(--muted);font-size:0.92rem;line-height:1.9;}
.foot-bottom{
  border-top:2px solid #24375a;padding-top:22px;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  color:#7c8da6;font-size:0.86rem;
}
@media(max-width:820px){.foot-grid{grid-template-columns:1fr 1fr;}}
@media(max-width:560px){.foot-grid{grid-template-columns:1fr;}}

/* ============ BACK TO TOP ============ */
#toTop{
  position:fixed;right:22px;bottom:22px;z-index:1200;
  width:52px;height:52px;border:3px solid var(--main);border-radius:0;
  background:var(--panel);color:var(--main);font-size:1.15rem;
  box-shadow:5px 5px 0 rgba(251,146,60,0.55);
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .3s ease,transform .3s ease,visibility .3s;
}
#toTop.show{opacity:1;visibility:visible;transform:translateY(0);}
#toTop:hover{background:var(--main);color:#0f172a;}

/* ============ REVEAL ============ */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease;}
.reveal.visible{opacity:1;transform:translateY(0);}

/* lazy image placeholder */
.img-holder{
  background:linear-gradient(100deg,#16233c 25%,#1d3050 50%,#16233c 75%);
  background-size:200% 100%;
  animation:shimmer 1.4s infinite linear;
}
@keyframes shimmer{0%{background-position:200% 0;}100%{background-position:-200% 0;}}

/* --- 子页面追加 --- */
.guide-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }
.guide-card {
    background: var(--panel);
    border: 1px solid rgba(34,211,238,.22);
    padding: 24px 22px;
    box-shadow: 6px 6px 0 rgba(34,211,238,.16);
  }
.guide-card h3 { font-size: 1.05rem; margin: 0 0 10px; color: var(--text); letter-spacing: .01em; }
.guide-card p { color: var(--muted); font-size: .93rem; line-height: 1.85; margin: 0; }
.guide-card .num {
    font-family: 'Inter', monospace;
    color: var(--accent);
    font-weight: 800;
    font-size: .78rem;
    letter-spacing: .16em;
    display: block;
    margin-bottom: 12px;
  }
.check-list { list-style: none; padding: 0; margin: 0; }
.check-list li {
    position: relative;
    padding: 12px 0 12px 34px;
    color: var(--text);
    font-size: .95rem;
    line-height: 1.8;
    border-bottom: 1px dashed rgba(148,163,184,.22);
  }
.check-list li:last-child { border-bottom: none; }
.check-list li i {
    position: absolute; left: 0; top: 15px;
    color: var(--main); font-size: .9rem;
  }
.check-list li.no i { color: var(--accent); }
.flow-row { display: flex; flex-wrap: wrap; gap: 0; }
.flow-step {
    flex: 1 1 200px;
    background: var(--panel-2);
    border: 1px solid rgba(34,211,238,.2);
    padding: 20px 18px;
    position: relative;
  }
.flow-step .step-no {
    width: 30px; height: 30px; line-height: 30px; text-align: center;
    border-radius: 50%;
    background: var(--main); color: #06202a;
    font-weight: 800; font-size: .85rem;
    margin-bottom: 12px;
  }
.flow-step h3 { font-size: .98rem; margin: 0 0 8px; }
.flow-step p { color: var(--muted); font-size: .88rem; line-height: 1.75; margin: 0; }
.warn-box {
    border-left: 3px solid var(--accent);
    background: rgba(251,146,60,.08);
    padding: 18px 20px;
    margin: 24px 0;
    color: var(--text);
    font-size: .93rem;
    line-height: 1.85;
  }
.warn-box strong { color: var(--accent); }
.faq-item h3 { font-size: 1rem; margin: 0 0 8px; color: var(--main); }
.faq-item p { color: var(--muted); font-size: .93rem; line-height: 1.85; margin: 0; }
.guide-card { padding: 20px 16px; }
.flow-step { flex: 1 1 100%; }

/* --- 子页面追加 --- */
.about-hero-sub {margin-top:1rem;max-width:760px;color:var(--muted);font-size:1.02rem;line-height:1.85}
.about-lede {color:var(--text);opacity:.92;line-height:1.9;font-size:1.02rem}
.about-card {background:var(--panel);border:1px solid rgba(34,211,238,.18);padding:1.6rem 1.5rem;height:100%;box-shadow:6px 6px 0 rgba(34,211,238,.12);transition:transform .18s ease}
.about-card:hover {transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--main)}
.about-card h3 {font-size:1.1rem;margin-bottom:.7rem;color:var(--text);font-weight:700}
.about-card p {color:var(--muted);line-height:1.8;font-size:.94rem;margin:0}
.about-icon {width:44px;height:44px;display:flex;align-items:center;justify-content:center;background:rgba(34,211,238,.12);color:var(--main);font-size:1.15rem;margin-bottom:1rem;border:1px solid rgba(34,211,238,.25)}
.step-list {counter-reset:step;list-style:none;padding:0;margin:0}
.step-list li {position:relative;padding:1.1rem 0 1.1rem 3.4rem;border-bottom:1px dashed rgba(34,211,238,.18)}
.step-list li:last-child {border-bottom:none}
.step-list li::before {counter-increment:step;content:counter(step);position:absolute;left:0;top:1.05rem;width:2.4rem;height:2.4rem;display:flex;align-items:center;justify-content:center;background:var(--accent);color:#0f172a;font-weight:800;font-family:'Inter',sans-serif;box-shadow:3px 3px 0 rgba(251,146,60,.3)}
.step-list strong {display:block;color:var(--text);font-size:1rem;margin-bottom:.35rem}
.step-list span {color:var(--muted);font-size:.92rem;line-height:1.75;display:block}
.stat-band {display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:1rem;margin-top:2rem}
.stat-item {background:var(--panel-2);border-left:3px solid var(--main);padding:1.2rem 1.3rem}
.stat-item .num {font-family:'Inter',sans-serif;font-weight:800;font-size:1.7rem;color:var(--main);letter-spacing:-.02em}
.stat-item .lbl {color:var(--muted);font-size:.85rem;margin-top:.25rem}
.about-hero-sub {font-size:.95rem}
.stat-item .num {font-size:1.4rem}

/* --- 子页面追加 --- */
/* 本页专属少量样式，与站点变量保持一致 */
  .disclaimer-hero .hero-kicker { color: var(--accent); }
.legal-card {
    background: var(--panel);
    border: 1px solid rgba(34,211,238,.18);
    border-radius: 14px;
    padding: 1.6rem 1.5rem;
    height: 100%;
  }
.legal-card h3 {
    font-size: 1.08rem;
    font-weight: 700;
    color: var(--main);
    margin-bottom: .7rem;
    display: flex;
    align-items: center;
    gap: .55rem;
  }
.legal-card h3 i { color: var(--accent); font-size: .95rem; }
.legal-card p, .legal-card li {
    color: var(--muted);
    font-size: .93rem;
    line-height: 1.85;
    margin-bottom: .5rem;
  }
.legal-card ul { padding-left: 1.1rem; margin-bottom: 0; }
.legal-card li::marker { color: var(--main); }
.legal-num {
    font-family: 'Inter', monospace;
    font-weight: 800;
    color: var(--main);
    letter-spacing: .04em;
  }
.legal-block {
    background: var(--panel-2);
    border-left: 4px solid var(--accent);
    border-radius: 0 12px 12px 0;
    padding: 1.3rem 1.4rem;
    margin-bottom: 1.2rem;
  }
.legal-block h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: .65rem;
  }
.legal-block h3 .legal-num { margin-right: .4rem; }
.legal-block p, .legal-block li {
    color: var(--muted);
    font-size: .93rem;
    line-height: 1.9;
    margin-bottom: .55rem;
  }
.legal-block ul { padding-left: 1.15rem; margin-bottom: 0; }
.legal-block li::marker { color: var(--accent); }
.legal-note {
    font-size: .85rem;
    color: var(--muted);
    border-top: 1px dashed rgba(148,163,184,.3);
    padding-top: 1rem;
    margin-top: 1.6rem;
  }
.legal-note a { color: var(--main); text-decoration: none; }
.legal-note a:hover { color: var(--accent); }
.flow-tag { margin-right: .35rem; margin-bottom: .35rem; display: inline-block; }