:root{
  --main:#22d3ee;
  --accent:#fb923c;
  --bg:#0f172a;
  --text:#e2e8f0;
  --card:#16223b;
  --card2:#1b2942;
  --line:rgba(226,232,240,.12);
  --muted:#94a3b8;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  font-weight:400;
  overflow-x:hidden;
  line-height:1.7;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:radial-gradient(rgba(34,211,238,.10) 1px, transparent 1px);
  background-size:26px 26px;
  pointer-events:none;
  z-index:0;
}
.grid-lines{
  position:fixed;
  inset:0;
  background-image:linear-gradient(rgba(226,232,240,.045) 1px, transparent 1px),
                   linear-gradient(90deg, rgba(226,232,240,.045) 1px, transparent 1px);
  background-size:120px 120px;
  pointer-events:none;
  z-index:0;
}
main,header,footer{position:relative;z-index:1;}
h1,h2,h3,h4{font-weight:800;letter-spacing:-.02em;}
a{text-decoration:none;}

/* ===== NAV ===== */
.nav-shell{
  position:sticky;
  top:0;
  z-index:1000;
  background:rgba(15,23,42,0);
  backdrop-filter:blur(0px);
  border-bottom:1px solid transparent;
  transition:background .35s ease, backdrop-filter .35s ease, border-color .35s ease;
}
.nav-shell.scrolled{
  background:rgba(15,23,42,.86);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.navbar-brand{
  font-weight:900;
  font-size:1.3rem;
  color:var(--text)!important;
  display:flex;
  align-items:center;
  gap:.5rem;
}
.navbar-brand .brand-dot{
  width:11px;height:11px;border-radius:50%;
  background:var(--main);
  box-shadow:0 0 14px var(--main);
  display:inline-block;
}
.nav-link{
  color:var(--muted)!important;
  font-weight:600;
  font-size:.94rem;
  padding:.45rem .95rem!important;
  border-radius:999px;
  transition:color .25s, background .25s;
}
.nav-link:hover,.nav-link.active{
  color:var(--text)!important;
  background:rgba(34,211,238,.13);
}
.navbar-toggler{border:1px solid var(--line);color:var(--text);}
.navbar-toggler:focus{box-shadow:none;}
.navbar-toggler-icon{
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='%23e2e8f0' stroke-width='2.4' stroke-linecap='round' d='M4 8h22M4 15h22M4 22h22'/%3E%3C/svg%3E");
}

/* ===== BUTTONS ===== */
.btn-pill{
  border-radius:999px;
  padding:.75rem 1.9rem;
  font-weight:700;
  font-size:.95rem;
  transition:transform .25s, box-shadow .25s, background .25s, color .25s;
  display:inline-flex;
  align-items:center;
  gap:.5rem;
}
.btn-main{
  background:var(--main);
  color:#062028;
  border:1px solid var(--main);
}
.btn-main:hover{
  transform:translateY(-3px);
  box-shadow:0 10px 30px rgba(34,211,238,.35);
  color:#062028;
}
.btn-ghost{
  background:transparent;
  color:var(--text);
  border:1px solid rgba(226,232,240,.32);
}
.btn-ghost:hover{
  transform:translateY(-3px);
  border-color:var(--accent);
  color:var(--accent);
  box-shadow:0 10px 30px rgba(251,146,60,.2);
}

/* ===== HERO ===== */
.hero{
  padding:7.5rem 0 4.5rem;
  position:relative;
}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  border:1px solid rgba(34,211,238,.35);
  background:rgba(34,211,238,.08);
  color:var(--main);
  border-radius:999px;
  padding:.4rem 1rem;
  font-size:.82rem;
  font-weight:600;
  letter-spacing:.05em;
}
.hero h1{
  font-size:clamp(2.1rem,5.4vw,4rem);
  line-height:1.12;
  font-weight:900;
  margin:1.5rem 0 1.2rem;
}
.hero h1 .hl{color:var(--main);}
.hero h1 .hl2{color:var(--accent);}
.hero-sub{
  color:var(--muted);
  font-size:clamp(1rem,1.6vw,1.15rem);
  max-width:640px;
  font-weight:400;
}
.hero-stats{
  display:flex;
  flex-wrap:wrap;
  gap:2.4rem;
  margin-top:3rem;
  padding-top:2rem;
  border-top:1px solid var(--line);
}
.stat-item .num{
  font-size:clamp(1.7rem,3.4vw,2.6rem);
  font-weight:900;
  color:var(--main);
  line-height:1;
}
.stat-item .num.acc{color:var(--accent);}
.stat-item .lbl{
  font-size:.84rem;
  color:var(--muted);
  margin-top:.45rem;
  font-weight:500;
}

/* ===== SECTION COMMON ===== */
.sec{padding:5rem 0;}
.sec-head{margin-bottom:3rem;}
.sec-tag{
  display:inline-block;
  font-size:.78rem;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--accent);
  margin-bottom:.9rem;
}
.sec-head h2{
  font-size:clamp(1.6rem,3.2vw,2.5rem);
  font-weight:900;
  margin:0 0 .9rem;
}
.sec-head p{color:var(--muted);max-width:620px;margin:0;}

/* ===== TIMELINE ===== */
.timeline-wrap{
  position:relative;
  padding:1.5rem 0;
}
.timeline-line{
  position:absolute;
  left:50%;
  top:0;bottom:0;
  width:2px;
  transform:translateX(-50%);
  background:linear-gradient(180deg,transparent,rgba(34,211,238,.5),rgba(251,146,60,.5),transparent);
}
.tl-item{
  position:relative;
  width:50%;
  padding:0 3rem 3.2rem 0;
}
.tl-item.right{
  margin-left:50%;
  padding:0 0 3.2rem 3rem;
  text-align:left;
}
.tl-item.left{text-align:right;}
.tl-dot{
  position:absolute;
  top:.4rem;
  width:16px;height:16px;
  border-radius:50%;
  background:var(--bg);
  border:3px solid var(--main);
  box-shadow:0 0 0 4px rgba(34,211,238,.14);
}
.tl-item.left .tl-dot{right:-8px;}
.tl-item.right .tl-dot{left:-8px;border-color:var(--accent);box-shadow:0 0 0 4px rgba(251,146,60,.14);}
.tl-time{
  font-size:.8rem;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--main);
  margin-bottom:.5rem;
}
.tl-item.right .tl-time{color:var(--accent);}
.tl-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:16px;
  padding:1.4rem 1.6rem;
  display:inline-block;
  text-align:left;
  transition:transform .3s, box-shadow .3s, border-color .3s;
}
.tl-card:hover{
  transform:translateY(-6px);
  box-shadow:0 18px 44px rgba(0,0,0,.55);
  border-color:rgba(34,211,238,.4);
}
.tl-card h3{font-size:1.08rem;font-weight:800;margin:0 0 .5rem;}
.tl-card p{color:var(--muted);font-size:.92rem;margin:0;}

/* ===== COMPARE TABLE ===== */
.cmp-table-wrap{
  border:1px solid var(--line);
  border-radius:18px;
  overflow:hidden;
  background:var(--card);
}
table.cmp{
  width:100%;
  margin:0;
  border-collapse:collapse;
}
table.cmp th,table.cmp td{
  padding:1.15rem 1.3rem;
  border-bottom:1px solid var(--line);
  font-size:.94rem;
  vertical-align:top;
}
table.cmp thead th{
  background:rgba(34,211,238,.09);
  color:var(--main);
  font-weight:800;
  font-size:.86rem;
  letter-spacing:.05em;
  white-space:nowrap;
}
table.cmp thead th:nth-child(3){color:var(--accent);background:rgba(251,146,60,.09);}
table.cmp tbody tr:last-child td{border-bottom:none;}
table.cmp tbody tr{transition:background .25s;}
table.cmp tbody tr:hover{background:rgba(226,232,240,.035);}
table.cmp td:first-child{font-weight:700;color:var(--text);}
table.cmp td:nth-child(2){color:var(--muted);}
table.cmp td:nth-child(3){color:var(--text);}
.yes{color:var(--main);font-weight:700;}
.no{color:#64748b;font-weight:600;}

/* ===== FEATURE GRID ===== */
.feat-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:16px;
  padding:2rem 1.75rem;
  height:100%;
  transition:transform .3s, box-shadow .3s, border-color .3s;
}
.feat-card:hover{
  transform:translateY(-8px);
  box-shadow:0 22px 50px rgba(0,0,0,.6);
  border-color:rgba(251,146,60,.4);
}
.feat-ico{
  width:52px;height:52px;
  border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(34,211,238,.12);
  color:var(--main);
  font-size:1.35rem;
  margin-bottom:1.2rem;
}
.feat-card:nth-child(even) .feat-ico{background:rgba(251,146,60,.12);color:var(--accent);}
.feat-card h3{font-size:1.12rem;font-weight:800;margin:0 0 .6rem;}
.feat-card p{color:var(--muted);font-size:.93rem;margin:0;}

/* ===== NUMBERED LIST ===== */
.num-list{counter-reset:nl;list-style:none;padding:0;margin:0;}
.num-list li{
  counter-increment:nl;
  position:relative;
  padding:1.15rem 0 1.15rem 3.6rem;
  border-bottom:1px dashed var(--line);
}
.num-list li:last-child{border-bottom:none;}
.num-list li::before{
  content:counter(nl,decimal-leading-zero);
  position:absolute;
  left:0;top:1.05rem;
  width:2.4rem;height:2.4rem;
  border-radius:50%;
  border:1px solid rgba(34,211,238,.4);
  color:var(--main);
  font-weight:800;
  font-size:.85rem;
  display:flex;align-items:center;justify-content:center;
}
.num-list li:nth-child(even)::before{
  border-color:rgba(251,146,60,.45);
  color:var(--accent);
}
.num-list h4{font-size:1.02rem;font-weight:800;margin:0 0 .35rem;}
.num-list p{color:var(--muted);font-size:.92rem;margin:0;}

/* ===== FAQ ===== */
.faq-item{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:14px;
  margin-bottom:1rem;
  overflow:hidden;
}
.faq-q{
  width:100%;
  background:none;
  border:none;
  color:var(--text);
  font-weight:700;
  font-size:1rem;
  text-align:left;
  padding:1.25rem 1.5rem;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:1rem;
  cursor:pointer;
}
.faq-q i{color:var(--main);transition:transform .3s;flex-shrink:0;}
.faq-item.open .faq-q i{transform:rotate(180deg);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .35s ease, padding .35s ease;
  color:var(--muted);
  font-size:.94rem;
  padding:0 1.5rem;
}
.faq-item.open .faq-a{padding:0 1.5rem 1.3rem;max-height:360px;}

/* ===== CTA ===== */
.cta-box{
  border-radius:22px;
  border:1px solid rgba(34,211,238,.3);
  background:linear-gradient(135deg, rgba(34,211,238,.12), rgba(251,146,60,.10));
  padding:3.5rem 2.2rem;
  text-align:center;
}
.cta-box h2{font-size:clamp(1.6rem,3.4vw,2.5rem);font-weight:900;margin:0 0 1rem;}
.cta-box p{color:var(--muted);max-width:560px;margin:0 auto 2rem;}

/* ===== FRIEND LINKS ===== */
.friend-links{
  border-top:1px solid var(--line);
  padding:2.6rem 0;
}
.friend-links h5{
  font-size:.82rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--accent);
  font-weight:700;
  margin-bottom:1rem;
}
.friend-links .fl-body{
  color:var(--muted);
  font-size:.9rem;
  line-height:2;
  word-break:break-all;
}

/* ===== FOOTER ===== */
footer.site-foot{
  border-top:1px solid var(--line);
  padding:3rem 0 2.2rem;
  background:rgba(0,0,0,.2);
}
.foot-brand{font-weight:900;font-size:1.15rem;color:var(--text);}
.foot-desc{color:var(--muted);font-size:.9rem;margin-top:.8rem;max-width:380px;}
.foot-links a{
  color:var(--muted);
  font-size:.92rem;
  display:block;
  margin-bottom:.65rem;
  transition:color .25s, padding-left .25s;
}
.foot-links a:hover{color:var(--main);padding-left:5px;}
.foot-bottom{
  border-top:1px solid var(--line);
  margin-top:2.4rem;
  padding-top:1.6rem;
  color:#64748b;
  font-size:.85rem;
  display:flex;
  flex-wrap:wrap;
  gap:.6rem 1.4rem;
  justify-content:space-between;
}

/* ===== REVEAL ===== */
.reveal{
  opacity:0;
  transform:translateY(34px);
  transition:opacity .7s cubic-bezier(.2,.7,.3,1), transform .7s cubic-bezier(.2,.7,.3,1);
}
.reveal.in{opacity:1;transform:translateY(0);}

@media (max-width:991.98px){
  .hero{padding:5.5rem 0 3rem;}
  .tl-item,.tl-item.right{
    width:100%;
    margin-left:0;
    padding:0 0 2.6rem 2.6rem;
    text-align:left;
  }
  .timeline-line{left:9px;transform:none;}
  .tl-item.left .tl-dot,.tl-item.right .tl-dot{left:1px;right:auto;}
  .tl-card{display:block;}
}
@media (max-width:575.98px){
  .sec{padding:3.4rem 0;}
  .hero-stats{gap:1.6rem;}
  table.cmp th,table.cmp td{padding:.85rem .8rem;font-size:.86rem;}
}

/* --- 子页面追加 --- */
.about-hero {padding:104px 0 44px;}
.about-hero h1 {font-size:clamp(1.7rem,4vw,2.7rem);font-weight:800;line-height:1.25;letter-spacing:-.02em;}
.about-hero p {color:var(--muted);max-width:760px;margin-top:16px;line-height:1.85;}
.lead-quote {border-left:3px solid var(--main);padding:4px 0 4px 18px;margin-top:26px;color:var(--text);font-size:1.02rem;line-height:1.9;opacity:.92;}
.info-card {background:var(--card);border:1px solid var(--line);border-radius:16px;padding:26px 24px;height:100%;transition:.25s;}
.info-card:hover {background:var(--card2);transform:translateY(-3px);border-color:rgba(34,211,238,.35);}
.info-card i {font-size:1.35rem;color:var(--main);}
.info-card h3 {font-size:1.06rem;font-weight:700;margin:14px 0 10px;color:var(--text);line-height:1.5;}
.info-card p {color:var(--muted);font-size:.93rem;line-height:1.85;margin:0;}
.rule-list {list-style:none;padding:0;margin:0;}
.rule-list li {display:flex;gap:14px;padding:14px 0;border-bottom:1px dashed var(--line);color:var(--muted);font-size:.95rem;line-height:1.8;}
.rule-list li:last-child {border-bottom:none;}
.rule-list i {color:var(--accent);margin-top:5px;flex-shrink:0;}
.rule-list strong {color:var(--text);font-weight:600;}
.tag-row {display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;}
.tag-row span {background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.3);color:var(--main);border-radius:999px;padding:6px 15px;font-size:.85rem;font-weight:500;}
.faq-item h4 {font-size:1rem;font-weight:700;color:var(--text);margin:0 0 10px;display:flex;gap:10px;align-items:flex-start;line-height:1.6;}
.faq-item h4 i {color:var(--main);margin-top:4px;font-size:.9rem;flex-shrink:0;}
.faq-item p {color:var(--muted);font-size:.93rem;line-height:1.85;margin:0;}
.about-cta {background:linear-gradient(135deg,rgba(34,211,238,.12),rgba(251,146,60,.1));border:1px solid var(--line);border-radius:18px;padding:38px 30px;text-align:center;}
.about-cta h3 {font-size:1.3rem;font-weight:800;color:var(--text);margin-bottom:12px;}
.about-cta p {color:var(--muted);max-width:620px;margin:0 auto 22px;line-height:1.85;font-size:.95rem;}
.stat-mini {background:var(--card2);border:1px solid var(--line);border-radius:14px;padding:20px 18px;text-align:center;height:100%;}
.stat-mini b {display:block;font-size:1.5rem;font-weight:800;color:var(--main);letter-spacing:-.02em;}
.stat-mini span {color:var(--muted);font-size:.85rem;display:block;margin-top:6px;}
.about-hero {padding:88px 0 30px;}
.info-card,.faq-item {padding:20px 18px;}

/* --- 子页面追加 --- */
.doc-wrap {max-width:920px;margin:0 auto;}
.doc-lead {color:var(--muted);font-size:1.02rem;line-height:1.9;}
.doc-block {background:var(--card);border:1px solid var(--line);border-radius:16px;padding:26px 26px 22px;margin-bottom:22px;}
.doc-block h2 {font-size:1.18rem;font-weight:800;letter-spacing:.2px;margin:0 0 14px;display:flex;align-items:center;gap:10px;}
.doc-block h2 i {color:var(--main);font-size:1rem;}
.doc-block h3 {font-size:1rem;font-weight:700;margin:18px 0 8px;color:var(--text);}
.doc-block p, .doc-block li {color:var(--muted);line-height:1.9;font-size:.95rem;}
.doc-block ul {padding-left:1.15rem;margin:8px 0 0;}
.doc-block ul li {margin-bottom:6px;}
.doc-block strong {color:var(--text);font-weight:600;}
.doc-num {display:inline-flex;align-items:center;justify-content:center;min-width:26px;height:26px;border-radius:8px;background:rgba(34,211,238,.12);color:var(--main);font-size:.78rem;font-weight:800;margin-right:10px;}
.doc-toc {background:var(--card2);border:1px solid var(--line);border-radius:16px;padding:20px 22px;margin-bottom:26px;}
.doc-toc .t {font-size:.8rem;letter-spacing:.12em;text-transform:uppercase;color:var(--main);font-weight:700;margin-bottom:12px;}
.doc-toc a {display:block;color:var(--muted);text-decoration:none;padding:6px 0;font-size:.92rem;border-bottom:1px dashed var(--line);transition:.2s;}
.doc-toc a:last-child {border-bottom:0;}
.doc-toc a:hover {color:var(--main);padding-left:6px;}
.doc-note {border-left:3px solid var(--accent);background:rgba(251,146,60,.07);border-radius:0 12px 12px 0;padding:14px 18px;margin-top:14px;}
.doc-note p {color:var(--text);margin:0;font-size:.93rem;line-height:1.85;}
.doc-date {display:inline-flex;align-items:center;gap:8px;font-size:.82rem;color:var(--muted);background:var(--card2);border:1px solid var(--line);border-radius:999px;padding:6px 14px;margin-bottom:18px;}
.doc-date i {color:var(--main);}
.doc-cta {display:flex;flex-wrap:wrap;gap:12px;margin-top:8px;}
.doc-block {padding:20px 18px 16px;}
.doc-block h2 {font-size:1.06rem;}