:root{
  --main:#818cf8;
  --accent:#c084fc;
  --bg:#1e1b4b;
  --text:#e0e7ff;
  --bg-soft:#252163;
  --bg-deep:#171439;
  --line:#4c47a8;
  --muted:#a5a8e0;
}
*{border-radius:0!important;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg);
  color:var(--text);
  font-family:'Inter','PingFang SC','Microsoft YaHei',sans-serif;
  font-weight:400;
  line-height:1.85;
  margin:0;
  overflow-x:hidden;
}
::selection{background:var(--accent);color:var(--bg-deep);}
h1,h2,h3,h4,h5{font-weight:900;letter-spacing:-.02em;line-height:1.18;}
a{color:var(--main);text-decoration:none;transition:color .2s;}
a:hover{color:var(--accent);}
.mono{font-family:'SFMono-Regular',Consolas,'Courier New',monospace;font-variant-numeric:tabular-nums;}

/* progress bar */
#readProgress{
  position:fixed;top:0;left:0;height:5px;width:0%;
  background:linear-gradient(90deg,var(--main),var(--accent));
  z-index:2000;
}

/* nav */
.site-nav{
  position:sticky;top:0;z-index:1500;
  background:var(--bg-deep);
  border-bottom:3px solid var(--line);
}
.nav-inner{
  max-width:1160px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 22px;gap:18px;
}
.brand{
  font-weight:900;font-size:1.22rem;color:var(--text);
  letter-spacing:-.01em;white-space:nowrap;
  display:flex;align-items:center;gap:9px;
}
.brand i{color:var(--accent);}
.brand:hover{color:var(--main);}
.nav-links{display:flex;align-items:center;gap:6px;list-style:none;margin:0;padding:0;flex-wrap:wrap;}
.nav-links a{
  display:block;padding:8px 14px;font-size:.92rem;font-weight:600;
  color:var(--muted);border:2px solid transparent;
}
.nav-links a:hover{color:var(--text);border-color:var(--line);background:var(--bg-soft);}
.nav-toggle{
  display:none;background:transparent;border:3px solid var(--line);
  color:var(--text);font-size:1.1rem;padding:6px 12px;cursor:pointer;
}
@media(max-width:860px){
  .nav-toggle{display:block;}
  .nav-links{
    display:none;position:absolute;left:0;right:0;top:100%;
    background:var(--bg-deep);border-bottom:3px solid var(--line);
    flex-direction:column;align-items:stretch;padding:10px 16px 18px;gap:2px;
  }
  .nav-links.open{display:flex;}
  .nav-links a{border-color:var(--line);}
}

/* layout */
.wrap{max-width:1160px;margin:0 auto;padding:0 22px;}
.narrow{max-width:840px;margin:0 auto;padding:0 22px;}
section{padding:96px 0;}
@media(max-width:768px){section{padding:64px 0;}}

/* hero */
.hero{
  padding:104px 0 92px;
  border-bottom:3px solid var(--line);
  background:
    linear-gradient(180deg,rgba(129,140,248,.10),rgba(30,27,75,0) 70%);
}
.hero-big{
  font-size:clamp(3.4rem,11vw,7.4rem);
  font-weight:900;letter-spacing:-.05em;line-height:.92;
  color:var(--main);margin:0;
}
.hero-big em{font-style:normal;color:var(--accent);}
.hero-tag{
  display:inline-block;margin:26px 0 20px;
  border:3px solid var(--main);padding:5px 14px;
  font-size:.78rem;font-weight:700;letter-spacing:.16em;
  text-transform:uppercase;color:var(--main);
}
.hero h1{
  font-size:clamp(1.5rem,3.6vw,2.35rem);
  margin:0 0 20px;max-width:760px;
}
.hero p.lead{
  font-size:1.03rem;color:var(--muted);max-width:660px;margin-bottom:34px;
}
.hero-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  border:3px solid var(--line);margin-top:48px;
}
.hero-stats div{
  padding:22px 18px;border-right:3px solid var(--line);
}
.hero-stats div:last-child{border-right:none;}
.hero-stats .num{
  display:block;font-size:clamp(1.45rem,3.4vw,2.1rem);
  font-weight:900;color:var(--text);
}
.hero-stats .lbl{font-size:.76rem;color:var(--muted);letter-spacing:.06em;}
@media(max-width:720px){
  .hero-stats{grid-template-columns:repeat(2,1fr);}
  .hero-stats div:nth-child(2){border-right:none;}
  .hero-stats div:nth-child(1),.hero-stats div:nth-child(2){border-bottom:3px solid var(--line);}
}

/* buttons */
.btn-hard{
  display:inline-flex;align-items:center;gap:10px;
  padding:15px 32px;font-weight:800;font-size:.95rem;
  border:3px solid var(--main);color:var(--bg-deep);
  background:var(--main);position:relative;overflow:hidden;
  box-shadow:7px 7px 0 var(--accent);
  transition:transform .18s,box-shadow .18s;
}
.btn-hard::after{
  content:'';position:absolute;top:0;left:-120%;width:60%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.55),transparent);
  transform:skewX(-18deg);transition:left .55s ease;
}
.btn-hard:hover::after{left:150%;}
.btn-hard:hover{
  transform:translate(-3px,-3px);
  box-shadow:10px 10px 0 var(--accent);
  background:var(--accent);border-color:var(--accent);color:var(--bg-deep);
}
.btn-ghost{
  display:inline-flex;align-items:center;gap:10px;
  padding:15px 32px;font-weight:800;font-size:.95rem;
  border:3px solid var(--line);color:var(--text);background:transparent;
  transition:background .2s,border-color .2s;
}
.btn-ghost:hover{background:var(--bg-soft);border-color:var(--main);color:var(--text);}

/* section head */
.sec-head{margin-bottom:54px;max-width:780px;}
.sec-kicker{
  font-size:.76rem;font-weight:700;letter-spacing:.2em;
  text-transform:uppercase;color:var(--accent);margin-bottom:14px;
}
.sec-head h2{font-size:clamp(1.7rem,4.4vw,2.7rem);margin:0 0 16px;}
.sec-head p{color:var(--muted);margin:0;font-size:1rem;}

/* feature cards: icon list */
.feature-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:0;
  border:3px solid var(--line);
}
@media(max-width:900px){.feature-grid{grid-template-columns:repeat(2,1fr);}}
@media(max-width:600px){.feature-grid{grid-template-columns:1fr;}}
.feature-cell{
  padding:34px 28px;border-right:3px solid var(--line);
  border-bottom:3px solid var(--line);background:var(--bg-soft);
  transition:background .25s;
}
.feature-cell:nth-child(3n){border-right:none;}
.feature-cell:nth-last-child(-n+3){border-bottom:none;}
@media(max-width:900px){
  .feature-cell:nth-child(3n){border-right:3px solid var(--line);}
  .feature-cell:nth-child(2n){border-right:none;}
  .feature-cell:nth-last-child(-n+3){border-bottom:3px solid var(--line);}
  .feature-cell:nth-last-child(-n+2){border-bottom:none;}
}
@media(max-width:600px){
  .feature-cell{border-right:none!important;border-bottom:3px solid var(--line)!important;}
  .feature-cell:last-child{border-bottom:none!important;}
}
.feature-cell:hover{background:#2c2775;}
.f-ico{
  width:52px;height:52px;display:flex;align-items:center;justify-content:center;
  border:3px solid var(--main);color:var(--main);font-size:1.25rem;
  margin-bottom:20px;background:var(--bg-deep);
}
.feature-cell:hover .f-ico{border-color:var(--accent);color:var(--accent);}
.feature-cell h3{font-size:1.12rem;margin:0 0 10px;}
.feature-cell p{font-size:.9rem;color:var(--muted);margin:0;}

/* long article */
.article-block{
  border-left:6px solid var(--main);padding:4px 0 4px 30px;
  margin-bottom:44px;
}
.article-block h3{font-size:1.35rem;margin:0 0 14px;}
.article-block p{color:#c8cdf5;margin:0 0 14px;font-size:.98rem;}
.article-block p:last-child{margin-bottom:0;}
.data-row{
  display:grid;grid-template-columns:repeat(3,1fr);gap:0;
  border:3px solid var(--line);margin:44px 0;
}
.data-row div{padding:26px 22px;border-right:3px solid var(--line);}
.data-row div:last-child{border-right:none;}
.data-row .big{
  display:block;font-size:clamp(1.6rem,4vw,2.4rem);font-weight:900;
  color:var(--accent);line-height:1.1;
}
.data-row .sub{font-size:.8rem;color:var(--muted);}
@media(max-width:680px){
  .data-row{grid-template-columns:1fr;}
  .data-row div{border-right:none;border-bottom:3px solid var(--line);}
  .data-row div:last-child{border-bottom:none;}
}

/* accordion FAQ */
.faq-list{border:3px solid var(--line);}
.faq-item{border-bottom:3px solid var(--line);}
.faq-item:last-child{border-bottom:none;}
.faq-q{
  width:100%;text-align:left;background:var(--bg-soft);border:none;
  color:var(--text);font-weight:800;font-size:1rem;
  padding:24px 26px;display:flex;align-items:center;justify-content:space-between;
  gap:18px;cursor:pointer;font-family:inherit;line-height:1.5;
  transition:background .2s;
}
.faq-q:hover{background:#2c2775;}
.faq-q .ic{color:var(--main);font-size:.95rem;flex:0 0 auto;transition:transform .3s;}
.faq-item.open .faq-q .ic{transform:rotate(45deg);color:var(--accent);}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .38s ease;
  background:var(--bg-deep);
}
.faq-a-inner{padding:8px 26px 26px;color:var(--muted);font-size:.94rem;}
.faq-item.open .faq-a{max-height:420px;}

/* CTA */
.cta-box{
  border:3px solid var(--main);padding:64px 40px;text-align:center;
  background:linear-gradient(135deg,#221e58,#1a1741);
  box-shadow:12px 12px 0 var(--accent);
}
.cta-box h2{font-size:clamp(1.6rem,4.6vw,2.6rem);margin:0 0 18px;}
.cta-box p{color:var(--muted);max-width:560px;margin:0 auto 34px;}
.cta-actions{display:flex;gap:18px;justify-content:center;flex-wrap:wrap;}
@media(max-width:600px){.cta-box{padding:44px 22px;box-shadow:8px 8px 0 var(--accent);}}

/* friends */
.friends{
  border-top:3px solid var(--line);border-bottom:3px solid var(--line);
  padding:42px 0;background:var(--bg-deep);
}
.friends h3{
  font-size:.78rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--accent);margin:0 0 16px;font-weight:800;
}
.friends p{color:var(--muted);font-size:.9rem;margin:0;word-break:break-all;}

/* footer */
.site-footer{padding:60px 0 46px;background:var(--bg-deep);border-top:3px solid var(--line);}
.foot-top{
  display:flex;justify-content:space-between;align-items:flex-start;
  gap:40px;flex-wrap:wrap;margin-bottom:40px;
}
.foot-brand{font-weight:900;font-size:1.15rem;color:var(--text);margin-bottom:12px;}
.foot-brand i{color:var(--accent);margin-right:8px;}
.foot-desc{color:var(--muted);font-size:.88rem;max-width:420px;margin:0;}
.foot-links{display:flex;gap:26px;flex-wrap:wrap;list-style:none;margin:0;padding:0;}
.foot-links a{color:var(--muted);font-size:.88rem;font-weight:600;}
.foot-links a:hover{color:var(--main);}
.foot-bottom{
  border-top:3px solid var(--line);padding-top:24px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  color:var(--muted);font-size:.82rem;
}

/* reveal animation */
.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:none;}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
}

/* --- 子页面追加 --- */
.about-lead {max-width:760px;color:var(--muted);font-size:1.02rem;line-height:1.9;}
.about-lead strong {color:var(--text);font-weight:600;}
.timeline {display:grid;gap:18px;margin-top:8px;}
.tl-row {display:grid;grid-template-columns:110px 1fr;gap:20px;align-items:start;
    background:var(--bg-soft);border:1px solid var(--line);border-radius:14px;padding:18px 20px;}
.tl-year {font-family:'Inter',monospace;font-weight:800;font-size:1.15rem;color:var(--main);
    letter-spacing:.02em;}
.tl-body h3 {margin:0 0 6px;font-size:1rem;color:var(--text);font-weight:700;}
.tl-body p {margin:0;color:var(--muted);font-size:.92rem;line-height:1.8;}
.value-grid {display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;}
.value-card {background:var(--bg-soft);border:1px solid var(--line);border-radius:16px;padding:22px;
    transition:transform .2s ease,border-color .2s ease;}
.value-card:hover {transform:translateY(-3px);border-color:var(--main);}
.value-card .v-ico {width:42px;height:42px;border-radius:12px;display:flex;align-items:center;
    justify-content:center;background:rgba(129,140,248,.14);color:var(--main);font-size:1.05rem;margin-bottom:14px;}
.value-card h3 {margin:0 0 8px;font-size:1rem;color:var(--text);font-weight:700;}
.value-card p {margin:0;color:var(--muted);font-size:.9rem;line-height:1.8;}
.rule-list {list-style:none;padding:0;margin:0;display:grid;gap:12px;}
.rule-list li {display:flex;gap:12px;align-items:flex-start;color:var(--muted);
    font-size:.93rem;line-height:1.8;background:var(--bg-soft);border:1px solid var(--line);
    border-radius:12px;padding:14px 16px;}
.rule-list li i {color:var(--accent);margin-top:4px;flex-shrink:0;}
.rule-list li b {color:var(--text);font-weight:600;}
.num-grid {display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px;margin-top:6px;}
.num-box {background:var(--bg-deep);border:1px solid var(--line);border-radius:14px;
    padding:20px 18px;text-align:center;}
.num-box .n {font-family:'Inter',monospace;font-size:1.7rem;font-weight:800;color:var(--main);
    display:block;line-height:1.2;}
.num-box .t {color:var(--muted);font-size:.85rem;margin-top:6px;display:block;}
.tl-row {grid-template-columns:1fr;gap:8px;}
.tl-year {font-size:1rem;}

/* --- 子页面追加 --- */
.guide-hero {padding:64px 0 40px;}
.guide-hero h1 {font-size:clamp(1.9rem,4.2vw,3rem);line-height:1.25;font-weight:800;letter-spacing:-.02em;margin:14px 0 18px;}
.guide-hero p.lead {color:var(--muted);font-size:1.05rem;max-width:720px;line-height:1.85;}
.step-list {display:grid;gap:18px;margin-top:8px;}
.step-item {display:grid;grid-template-columns:56px 1fr;gap:18px;background:var(--bg-soft);border:1px solid var(--line);border-radius:16px;padding:22px 24px;}
.step-num {width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.2rem;color:var(--bg);background:linear-gradient(140deg,var(--main),var(--accent));font-family:'Inter',sans-serif;}
.step-item h3 {margin:0 0 8px;font-size:1.08rem;font-weight:700;color:var(--text);}
.step-item p {margin:0;color:var(--muted);line-height:1.8;font-size:.96rem;}
.tip-grid {display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px;margin-top:8px;}
.tip-cell {background:var(--bg-deep);border:1px solid var(--line);border-radius:14px;padding:20px 22px;}
.tip-cell h4 {margin:0 0 8px;font-size:1rem;font-weight:700;color:var(--text);display:flex;align-items:center;gap:8px;}
.tip-cell h4 i {color:var(--accent);}
.tip-cell p {margin:0;color:var(--muted);font-size:.92rem;line-height:1.75;}
.kbd {font-family:'Inter',monospace;background:var(--bg);border:1px solid var(--line);border-bottom-width:2px;border-radius:6px;padding:1px 7px;font-size:.85em;color:var(--text);}
.step-item {grid-template-columns:1fr;gap:12px;padding:18px;}
.step-num {width:44px;height:44px;border-radius:12px;font-size:1rem;}

/* --- 子页面追加 --- */
.legal-hero { padding: 56px 0 28px; }
.legal-meta { display:flex; flex-wrap:wrap; gap:10px 22px; margin-top:18px; font-size:.86rem; color:var(--muted); }
.legal-meta span i { color: var(--accent); margin-right:6px; }
.legal-block { background: var(--bg-soft); border:1px solid var(--line); border-radius:16px; padding:26px 24px; margin-bottom:22px; }
.legal-block h2 { font-size:1.22rem; font-weight:700; color:var(--text); margin-bottom:14px; display:flex; align-items:center; gap:10px; }
.legal-block h2 i { color: var(--main); font-size:1.05rem; }
.legal-block p { color:var(--muted); line-height:1.85; font-size:.95rem; margin-bottom:12px; }
.legal-block p:last-child { margin-bottom:0; }
.legal-block ul { margin:0 0 12px; padding-left:20px; }
.legal-block li { color:var(--muted); line-height:1.85; font-size:.95rem; margin-bottom:8px; }
.legal-block li strong, .legal-block p strong { color: var(--text); font-weight:600; }
.legal-block a { color: var(--accent); text-decoration:none; }
.legal-block a:hover { text-decoration:underline; }
.legal-toc { background: var(--bg-deep); border:1px solid var(--line); border-radius:16px; padding:22px 24px; }
.legal-toc h3 { font-size:.95rem; color:var(--text); font-weight:700; margin-bottom:14px; letter-spacing:.02em; }
.legal-toc ol { margin:0; padding-left:18px; }
.legal-toc li { margin-bottom:9px; }
.legal-toc a { color:var(--muted); font-size:.9rem; text-decoration:none; transition:color .2s; }
.legal-toc a:hover { color: var(--accent); }
.legal-note { border-left:3px solid var(--accent); background: rgba(192,132,252,.08); border-radius:0 12px 12px 0; padding:16px 18px; margin-top:6px; }
.legal-note p { color: var(--text); font-size:.92rem; margin:0; }
.legal-block { padding:20px 16px; }
.legal-hero { padding:36px 0 18px; }