:root{
  --brand:#6d28d9;
  --brand-2:#9333ea;
  --brand-3:#c026d3;
  --brand-soft:#f3e8ff;
  --brand-ink:#4c1d95;
  --bg:#fafafa;
  --bg-elev:#ffffff;
  --bg-soft:#f5f3ff;
  --text:#1f2937;
  --text-soft:#4b5563;
  --muted:#6b7280;
  --line:#e9e5f5;
  --line-strong:#ddd6fe;
  --shadow-sm:0 2px 10px rgba(76,29,149,.06);
  --shadow-md:0 10px 30px rgba(109,40,217,.10);
  --shadow-lg:0 18px 50px rgba(76,29,149,.16);
  --radius-sm:10px;
  --radius:16px;
  --radius-lg:22px;
  --glass:rgba(255,255,255,.62);
  --glass-line:rgba(255,255,255,.55);
  --header-bg:rgba(255,255,255,.78);
  --ease:cubic-bezier(.22,.61,.36,1);
  --maxw:1200px;
}

@media (prefers-color-scheme: dark){
  :root{
    --brand:#a78bfa;
    --brand-2:#c084fc;
    --brand-3:#e879f9;
    --brand-soft:rgba(167,139,250,.16);
    --brand-ink:#ddd6fe;
    --bg:#0b0a12;
    --bg-elev:#14121f;
    --bg-soft:#17142a;
    --text:#e9e6f5;
    --text-soft:#c5c0da;
    --muted:#9b95b5;
    --line:#262238;
    --line-strong:#3b3357;
    --shadow-sm:0 2px 10px rgba(0,0,0,.4);
    --shadow-md:0 10px 30px rgba(0,0,0,.45);
    --shadow-lg:0 18px 50px rgba(0,0,0,.55);
    --glass:rgba(20,18,31,.62);
    --glass-line:rgba(255,255,255,.08);
    --header-bg:rgba(11,10,18,.72);
  }
}

*,
*::before,
*::after{
  margin:0;
  padding:0;
  box-sizing:border-box;
}

html{
  scroll-behavior:smooth;
  scroll-padding-top:84px;
  -webkit-text-size-adjust:100%;
}

body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",Roboto,sans-serif;
  color:var(--text);
  line-height:1.8;
  background:
    radial-gradient(1200px 600px at 100% -10%,rgba(147,51,234,.10),transparent 60%),
    radial-gradient(900px 500px at -10% 10%,rgba(109,40,217,.08),transparent 55%),
    var(--bg);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

img,
video,
svg,
iframe{
  max-width:100%;
  height:auto;
  display:block;
}

a{
  color:var(--brand);
  text-decoration:none;
  transition:color .25s var(--ease),opacity .25s var(--ease);
}

a:hover{
  color:var(--brand-2);
  text-decoration:underline;
  text-underline-offset:3px;
}

a:focus-visible,
summary:focus-visible,
button:focus-visible{
  outline:2px solid var(--brand-2);
  outline-offset:3px;
  border-radius:6px;
}

::selection{
  background:var(--brand-2);
  color:#fff;
}

.wrap{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 22px;
}

/* ============ Header ============ */
header.site{
  position:sticky;
  top:0;
  z-index:100;
  background:var(--header-bg);
  -webkit-backdrop-filter:saturate(180%) blur(18px);
  backdrop-filter:saturate(180%) blur(18px);
  border-bottom:1px solid var(--glass-line);
  box-shadow:0 1px 0 rgba(109,40,217,.06),0 8px 30px rgba(76,29,149,.06);
  transition:background .3s var(--ease),box-shadow .3s var(--ease);
}

.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:68px;
  padding-top:6px;
  padding-bottom:6px;
}

.logo{
  position:relative;
  flex:0 0 auto;
  font-size:22px;
  font-weight:800;
  letter-spacing:.5px;
  line-height:1.2;
  color:transparent;
  background:linear-gradient(120deg,var(--brand),var(--brand-2) 55%,var(--brand-3));
  -webkit-background-clip:text;
  background-clip:text;
  padding-left:40px;
  transition:filter .3s var(--ease),transform .3s var(--ease);
}

.logo::before{
  content:"妖";
  position:absolute;
  left:0;
  top:50%;
  transform:translateY(-50%);
  width:30px;
  height:30px;
  display:grid;
  place-items:center;
  font-size:16px;
  font-weight:800;
  color:#fff;
  border-radius:9px;
  background:linear-gradient(135deg,var(--brand),var(--brand-3));
  box-shadow:0 6px 16px rgba(109,40,217,.35);
  -webkit-background-clip:border-box;
  background-clip:border-box;
}

.logo:hover{
  filter:brightness(1.12);
  transform:translateY(-1px);
}

.nav ul{
  display:flex;
  align-items:center;
  gap:4px;
  list-style:none;
  flex-wrap:wrap;
  justify-content:flex-end;
}

.nav ul a{
  position:relative;
  display:inline-block;
  padding:7px 11px;
  font-size:14.5px;
  font-weight:500;
  color:var(--text-soft);
  border-radius:10px;
  white-space:nowrap;
  transition:color .25s var(--ease),background .25s var(--ease),transform .25s var(--ease);
}

.nav ul a::after{
  content:"";
  position:absolute;
  left:11px;
  right:11px;
  bottom:4px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-3));
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .3s var(--ease);
}

.nav ul a:hover,
.nav ul a:focus-visible{
  color:var(--brand);
  background:var(--brand-soft);
  text-decoration:none;
  transform:translateY(-1px);
}

.nav ul a:hover::after,
.nav ul a:focus-visible::after{
  transform:scaleX(1);
}

/* ============ Breadcrumb ============ */
.breadcrumb{
  font-size:13.5px;
  padding:16px 0 6px;
  color:var(--muted);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px;
}

.breadcrumb a{
  color:var(--brand);
  font-weight:500;
}

.breadcrumb span{
  color:var(--muted);
}

/* ============ Hero ============ */
.hero{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  margin:14px 0 6px;
  padding:72px 0 78px;
  color:#fff;
  border-radius:0 0 34px 34px;
  background:
    radial-gradient(900px 420px at 15% 0%,rgba(255,255,255,.22),transparent 60%),
    radial-gradient(700px 420px at 92% 110%,rgba(232,121,249,.55),transparent 65%),
    linear-gradient(135deg,#4c1d95 0%,#6d28d9 38%,#9333ea 68%,#c026d3 100%);
  box-shadow:0 24px 60px rgba(76,29,149,.28);
}

.hero::before,
.hero::after{
  content:"";
  position:absolute;
  z-index:-1;
  border-radius:50%;
  filter:blur(10px);
  opacity:.5;
  animation:floaty 14s ease-in-out infinite;
}

.hero::before{
  width:320px;
  height:320px;
  top:-120px;
  right:-60px;
  background:radial-gradient(circle at 30% 30%,rgba(255,255,255,.5),transparent 65%);
}

.hero::after{
  width:260px;
  height:260px;
  bottom:-140px;
  left:-70px;
  background:radial-gradient(circle at 60% 40%,rgba(232,121,249,.7),transparent 65%);
  animation-delay:-6s;
}

.hero .wrap{
  position:relative;
  z-index:1;
}

.hero h1{
  font-size:clamp(26px,4vw,40px);
  line-height:1.32;
  font-weight:800;
  letter-spacing:.3px;
  margin-bottom:18px;
  text-wrap:balance;
  text-shadow:0 6px 26px rgba(0,0,0,.22);
  animation:riseIn .8s var(--ease) both;
}

.hero p{
  font-size:clamp(15px,1.6vw,17.5px);
  line-height:1.95;
  max-width:860px;
  color:rgba(255,255,255,.94);
  text-align:justify;
  animation:riseIn .9s .1s var(--ease) both;
}

/* ============ Sections ============ */
section{
  position:relative;
  padding:56px 0;
  border-bottom:1px solid var(--line);
}

section:last-of-type{
  border-bottom:none;
}

section h2{
  position:relative;
  font-size:clamp(21px,2.4vw,27px);
  line-height:1.4;
  font-weight:800;
  color:var(--brand-ink);
  margin-bottom:22px;
  padding-left:18px;
  letter-spacing:.2px;
}

section h2::before{
  content:"";
  position:absolute;
  left:0;
  top:50%;
  transform:translateY(-50%);
  width:6px;
  height:1.15em;
  border-radius:6px;
  background:linear-gradient(180deg,var(--brand),var(--brand-3));
  box-shadow:0 4px 14px rgba(147,51,234,.4);
}

section h3{
  font-size:clamp(17px,1.9vw,20px);
  font-weight:700;
  color:var(--brand-ink);
  margin:26px 0 10px;
  line-height:1.5;
}

section h4{
  font-size:16.5px;
  font-weight:700;
  color:var(--brand-ink);
  margin:18px 0 8px;
  line-height:1.5;
}

section p{
  margin-bottom:14px;
  color:var(--text-soft);
  text-align:justify;
  text-justify:inter-ideograph;
}

section p:last-child{
  margin-bottom:0;
}

/* ============ Cards ============ */
.cards{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(268px,1fr));
  gap:20px;
  margin-top:22px;
}

.card{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:22px 22px 20px;
  background:
    linear-gradient(180deg,var(--glass),var(--bg-elev) 65%);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);
  will-change:transform;
}

.card::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:3px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2),var(--brand-3));
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .45s var(--ease);
}

.card:hover{
  transform:translateY(-6px);
  border-color:var(--line-strong);
  box-shadow:var(--shadow-lg);
}

.card:hover::before{
  transform:scaleX(1);
}

.card h3{
  margin-top:0;
  font-size:17.5px;
  line-height:1.55;
  transition:color .25s var(--ease);
}

.card:hover h3{
  color:var(--brand-2);
}

.card p{
  font-size:14.8px;
  line-height:1.85;
  color:var(--text-soft);
  margin-bottom:0;
}

.card .meta{
  font-size:12.5px;
  letter-spacing:.3px;
  color:var(--muted);
  margin-bottom:2px;
}

.card a{
  font-weight:600;
  font-size:14px;
  display:inline-flex;
  align-items:center;
  gap:5px;
  margin-top:auto;
  padding-top:6px;
  color:var(--brand);
}

.card a::after{
  content:"→";
  transition:transform .3s var(--ease);
}

.card a:hover{
  text-decoration:none;
  color:var(--brand-2);
}

.card a:hover::after{
  transform:translateX(4px);
}

/* ============ FAQ ============ */
.faq-item{
  position:relative;
  margin-bottom:12px;
  background:var(--bg-elev);
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
  transition:border-color .3s var(--ease),box-shadow .3s var(--ease),transform .3s var(--ease);
}

.faq-item:hover{
  border-color:var(--line-strong);
  box-shadow:var(--shadow-md);
}

.faq-item[open]{
  border-color:var(--line-strong);
  box-shadow:var(--shadow-md);
}

.faq-item summary{
  position:relative;
  display:block;
  padding:15px 46px 15px 18px;
  cursor:pointer;
  font-weight:700;
  font-size:15.5px;
  line-height:1.65;
  color:var(--brand-ink);
  list-style:none;
  transition:background .3s var(--ease),color .3s var(--ease);
}

.faq-item summary::-webkit-details-marker{
  display:none;
}

.faq-item summary::after{
  content:"";
  position:absolute;
  right:18px;
  top:50%;
  width:9px;
  height:9px;
  margin-top:-6px;
  border-right:2px solid var(--brand-2);
  border-bottom:2px solid var(--brand-2);
  transform:rotate(45deg);
  transition:transform .35s var(--ease);
}

.faq-item[open] summary::after{
  transform:rotate(-135deg);
  margin-top:-3px;
}

.faq-item summary:hover{
  background:var(--brand-soft);
}

.faq-item div{
  padding:2px 20px 18px;
  color:var(--text-soft);
  font-size:14.8px;
  line-height:1.9;
  text-align:justify;
  animation:fadeSlide .4s var(--ease) both;
}

/* ============ Tables ============ */
.table-scroll{
  width:100%;
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
  border-radius:var(--radius-sm);
}

table{
  width:100%;
  border-collapse:separate;
  border-spacing:0;
  margin:18px 0;
  font-size:14.8px;
  background:var(--bg-elev);
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
}

th,
td{
  padding:12px 14px;
  text-align:left;
  vertical-align:top;
  line-height:1.75;
  border-bottom:1px solid var(--line);
}

th{
  font-weight:700;
  color:var(--brand-ink);
  background:linear-gradient(180deg,var(--brand-soft),transparent);
  white-space:nowrap;
}

tbody tr{
  transition:background .25s var(--ease);
}

tbody tr:hover{
  background:var(--brand-soft);
}

tbody tr:last-child th,
tbody tr:last-child td{
  border-bottom:none;
}

td a{
  word-break:break-word;
}

/* ============ Lists ============ */
ul.plain{
  list-style:none;
  padding-left:0;
  margin:12px 0 16px;
  display:grid;
  gap:2px;
}

ul.plain li{
  position:relative;
  padding:6px 0 6px 24px;
  color:var(--text-soft);
  font-size:15px;
  line-height:1.8;
  transition:color .25s var(--ease),transform .25s var(--ease);
}

ul.plain li::before{
  content:"▸";
  position:absolute;
  left:2px;
  top:6px;
  color:var(--brand-2);
  font-size:14px;
  transition:transform .25s var(--ease);
}

ul.plain li:hover{
  color:var(--text);
  transform:translateX(3px);
}

ul.plain li:hover::before{
  transform:translateX(2px);
}

/* ============ Tags ============ */
.tag{
  display:inline-block;
  padding:3px 12px;
  margin:3px 4px 3px 0;
  font-size:12.5px;
  font-weight:600;
  line-height:1.7;
  color:var(--brand);
  background:var(--brand-soft);
  border:1px solid var(--line-strong);
  border-radius:999px;
  transition:background .25s var(--ease),color .25s var(--ease),transform .25s var(--ease);
}

.tag:hover{
  background:linear-gradient(135deg,var(--brand),var(--brand-3));
  color:#fff;
  border-color:transparent;
  transform:translateY(-1px);
}

/* ============ Footer ============ */
footer{
  position:relative;
  margin-top:0;
  padding:52px 0 22px;
  color:#cfc9e2;
  font-size:14px;
  background:
    radial-gradient(800px 360px at 12% 0%,rgba(147,51,234,.28),transparent 60%),
    radial-gradient(700px 360px at 92% 100%,rgba(192,38,211,.20),transparent 62%),
    linear-gradient(180deg,#17142a,#0d0b16 70%);
  border-top:1px solid rgba(255,255,255,.06);
}

footer .cols{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(210px,1fr));
  gap:28px;
  margin-bottom:30px;
}

footer h4{
  font-size:15.5px;
  font-weight:700;
  color:#fff;
  margin-bottom:12px;
  letter-spacing:.3px;
}

footer p{
  color:#b7b0cf;
  font-size:13.8px;
  line-height:1.9;
  text-align:justify;
}

footer a{
  color:#c4b5fd;
  transition:color .25s var(--ease);
}

footer a:hover{
  color:#fff;
  text-decoration:none;
}

footer ul.plain{
  margin:0;
  gap:0;
}

footer ul.plain li{
  padding:5px 0 5px 20px;
  font-size:13.8px;
  color:#b7b0cf;
}

footer ul.plain li::before{
  content:"›";
  top:5px;
  left:2px;
  color:#a78bfa;
  font-size:15px;
}

footer ul.plain li:hover{
  color:#fff;
  transform:translateX(3px);
}

.copyright{
  padding-top:18px;
  border-top:1px solid rgba(255,255,255,.08);
  text-align:center;
  font-size:12.8px;
  line-height:1.9;
  color:#8f88a8;
}

.copyright p{
  color:inherit;
  text-align:center;
}

/* ============ Scroll reveal ============ */
@keyframes riseIn{
  from{opacity:0;transform:translateY(18px);}
  to{opacity:1;transform:translateY(0);}
}

@keyframes fadeSlide{
  from{opacity:0;transform:translateY(-6px);}
  to{opacity:1;transform:translateY(0);}
}

@keyframes floaty{
  0%,100%{transform:translate3d(0,0,0) scale(1);}
  50%{transform:translate3d(-18px,16px,0) scale(1.08);}
}

@supports (animation-timeline:view()){
  section{
    animation:sectionReveal linear both;
    animation-timeline:view();
    animation-range:entry 0% entry 28%;
  }

  .card,
  .faq-item{
    animation:cardReveal linear both;
    animation-timeline:view();
    animation-range:entry 0% entry 22%;
  }
}

@keyframes sectionReveal{
  from{opacity:.15;transform:translateY(26px);}
  to{opacity:1;transform:translateY(0);}
}

@keyframes cardReveal{
  from{opacity:.2;transform:translateY(20px) scale(.985);}
  to{opacity:1;transform:translateY(0) scale(1);}
}

/* Fallback entrance for browsers without scroll-timeline */
@supports not (animation-timeline:view()){
  section > .wrap{
    animation:riseIn .7s var(--ease) both;
  }
}

/* ============ Responsive ============ */
@media (max-width:1024px){
  .nav ul{
    gap:2px;
  }

  .nav ul a{
    padding:6px 9px;
    font-size:14px;
  }

  .hero{
    padding:60px 0 66px;
    border-radius:0 0 26px 26px;
  }
}

@media (max-width:860px){
  html{
    scroll-padding-top:76px;
  }

  .nav{
    flex-direction:column;
    align-items:flex-start;
    gap:10px;
    padding-top:12px;
    padding-bottom:12px;
  }

  .nav ul{
    width:100%;
    justify-content:flex-start;
    flex-wrap:nowrap;
    overflow-x:auto;
    padding-bottom:6px;
    scrollbar-width:thin;
    -webkit-overflow-scrolling:touch;
    -ms-overflow-style:none;
  }

  .nav ul::-webkit-scrollbar{
    height:4px;
  }

  .nav ul::-webkit-scrollbar-thumb{
    background:var(--line-strong);
    border-radius:4px;
  }

  .nav ul a{
    padding:7px 12px;
    font-size:14px;
    background:var(--bg-soft);
    border:1px solid var(--line);
    border-radius:999px;
  }

  .nav ul a::after{
    display:none;
  }

  section{
    padding:44px 0;
  }

  .hero{
    margin-top:10px;
    padding:52px 0 58px;
  }

  .hero p{
    text-align:left;
  }

  .cards{
    grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
    gap:16px;
  }

  table{
    font-size:14px;
  }

  th,
  td{
    padding:10px 12px;
  }
}

@media (max-width:600px){
  .wrap{
    padding:0 16px;
  }

  .logo{
    font-size:20px;
    padding-left:36px;
  }

  .logo::before{
    width:27px;
    height:27px;
    font-size:14px;
    border-radius:8px;
  }

  .hero{
    padding:44px 0 50px;
    border-radius:0 0 20px 20px;
    box-shadow:0 16px 40px rgba(76,29,149,.24);
  }

  .hero h1{
    margin-bottom:14px;
  }

  .hero p{
    font-size:14.8px;
    line-height:1.9;
  }

  section{
    padding:38px 0;
  }

  section h2{
    padding-left:14px;
    margin-bottom:18px;
  }

  section h2::before{
    width:5px;
  }

  section h3{
    margin-top:22px;
  }

  .cards{
    grid-template-columns:1fr;
    gap:14px;
  }

  .card{
    padding:18px 16px;
    border-radius:14px;
  }

  .card:hover{
    transform:translateY(-3px);
  }

  .faq-item summary{
    padding:13px 42px 13px 15px;
    font-size:14.8px;
  }

  .faq-item div{
    padding:2px 16px 16px;
    font-size:14.2px;
  }

  table{
    display:block;
    overflow-x:auto;
    -webkit-overflow-scrolling:touch;
    white-space:normal;
  }

  th,
  td{
    min-width:120px;
    font-size:13.6px;
    padding:9px 11px;
  }

  th{
    white-space:normal;
  }

  ul.plain li{
    font-size:14.4px;
  }

  footer{
    padding:40px 0 18px;
  }

  footer .cols{
    grid-template-columns:1fr;
    gap:22px;
  }

  .breadcrumb{
    font-size:12.8px;
    padding:12px 0 4px;
  }
}

@media (max-width:380px){
  .nav ul a{
    font-size:13.2px;
    padding:6px 10px;
  }

  .hero h1{
    font-size:23px;
  }
}

/* ============ Motion & a11y ============ */
@media (prefers-reduced-motion:reduce){
  html{
    scroll-behavior:auto;
  }

  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }

  .card:hover,
  ul.plain li:hover,
  .nav ul a:hover{
    transform:none;
  }
}

@media (prefers-contrast:more){
  :root{
    --line:#c9c2e0;
    --line-strong:#a78bfa;
    --text-soft:#374151;
  }

  .card,
  .faq-item,
  table{
    border-width:2px;
  }
}

@media print{
  header.site,
  footer,
  .hero::before,
  .hero::after{
    display:none !important;
  }

  body{
    background:#fff;
    color:#000;
  }

  .hero{
    background:#fff;
    color:#000;
    box-shadow:none;
    border-radius:0;
  }

  .hero h1,
  .hero p{
    color:#000;
    text-shadow:none;
  }

  section{
    break-inside:avoid;
    border-bottom:1px solid #ccc;
  }

  a{
    color:#000;
    text-decoration:underline;
  }
}