:root{
  --p:#6514ff;
  --m:#bf00ff;
  --ink:#1c1726;
  --bg:#f4f0ff;
  --card:#ffffff;
  --line:#e2d7ff;
  --soft:#efe8ff;
  --shadow:0 12px 32px -14px rgba(28,23,38,.3);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:'Roboto',"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:17px;
  line-height:1.65;
  color:var(--ink);
  background:var(--bg);
  padding-bottom:118px;
  overflow-x:hidden;
}
a{color:var(--p)}
img{max-width:100%;height:auto;display:block;border-radius:10px}
article[id]{scroll-margin-top:96px}

/* 顶栏 */
.topbar{
  position:sticky;top:0;z-index:40;
  background:rgba(255,255,255,.93);
  backdrop-filter:blur(8px);
  border-bottom:2px solid var(--ink);
}
.brandrow{
  max-width:1180px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:11px 18px;
}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  min-height:48px;text-decoration:none;color:var(--ink);
  font-size:19px;font-weight:700;letter-spacing:.01em;
}
.brand .mark{
  display:grid;place-items:center;width:36px;height:36px;flex:0 0 auto;
  border-radius:10px;color:#fff;font-size:16px;font-weight:700;
  background:linear-gradient(135deg,var(--p),var(--m));
  box-shadow:0 8px 18px -10px var(--m);
}
.contact{
  display:inline-flex;align-items:center;min-height:44px;padding:0 20px;
  border-radius:999px;background:var(--ink);color:#fff;
  text-decoration:none;font-size:16px;font-weight:600;
  transition:background .22s ease,transform .22s ease;
}
.contact:hover,.contact:focus-visible{background:var(--m);transform:translateY(-2px)}

/* 版心 */
.page{
  max-width:1180px;margin:0 auto;
  padding:22px 18px 0;
  display:grid;gap:36px;
  grid-template-columns:minmax(0,1fr);
}
.doc{min-width:0}

/* 头图 */
.hero{
  position:relative;overflow:hidden;
  min-height:70vh;
  display:flex;flex-direction:column;justify-content:flex-end;
  padding:34px 22px 36px;
  margin-bottom:48px;
  border-radius:18px;
  color:#fff;
  background:
    radial-gradient(circle at 1.5px 1.5px, rgba(255,255,255,.34) 1.6px, transparent 1.8px) 0 0/22px 22px,
    linear-gradient(150deg,var(--p) 0%,var(--m) 100%);
  animation:drift 20s linear infinite alternate;
}
@keyframes drift{
  from{background-position:0 0,0 0}
  to{background-position:44px 66px,0 0}
}
.hero::after{
  content:"";position:absolute;top:-72px;right:-58px;
  width:210px;height:210px;border-radius:26px;
  border:14px solid rgba(255,255,255,.26);
  transform:rotate(22deg);pointer-events:none;
}
.hero h1{
  position:relative;z-index:1;
  margin:0 0 14px;
  font-size:clamp(2rem,7.2vw,3.9rem);
  line-height:1.12;font-weight:700;letter-spacing:-.012em;
  text-shadow:0 8px 26px rgba(28,23,38,.24);
}
.lede{
  position:relative;z-index:1;
  margin:0;max-width:40ch;
  font-size:clamp(1rem,2.4vw,1.18rem);
  line-height:1.6;color:rgba(255,255,255,.95);
}

/* 正文 */
.content{display:block}
.content > article{
  background:var(--card);
  border-radius:10px;
  border-top:2px solid var(--ink);
  border-left:8px solid var(--p);
  box-shadow:var(--shadow);
  padding:26px 20px;
  margin:0 0 48px;
}
.content > article:nth-child(even){border-left-color:var(--m)}
.content > article:last-child{margin-bottom:8px}
.content h2{
  margin:0 0 14px;
  font-size:clamp(1.45rem,4.4vw,2rem);
  line-height:1.25;letter-spacing:-.01em;
}
.content h3{margin:26px 0 10px;font-size:1.22rem;line-height:1.35}
.content p{margin:0 0 16px;line-height:1.78}
.content ul,.content ol{margin:0 0 16px;padding-left:1.25em}
.content li{margin:0 0 8px;line-height:1.72}
.content a{
  color:var(--p);font-weight:500;
  text-decoration:underline;text-underline-offset:3px;
  transition:background .2s ease,color .2s ease;
}
.content a:hover{background:rgba(191,0,255,.14);color:var(--ink)}
.content blockquote{
  margin:0 0 16px;padding:14px 18px;
  background:var(--soft);border-left:6px solid var(--m);border-radius:10px;
}
.content blockquote p:last-child{margin-bottom:0}
.content strong{font-weight:700}
.content table{width:100%;border-collapse:collapse;margin:0 0 16px;font-size:16px}
.content th,.content td{border:1px solid var(--line);padding:10px;text-align:left;vertical-align:top}
.content th{background:var(--soft)}
.content code{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:.95em;background:var(--soft);padding:2px 6px;border-radius:6px;
}

/* 侧栏 */
.rail{
  background:var(--ink);color:#fff;
  border-radius:14px;padding:20px;
  box-shadow:var(--shadow);
}
.rail small{
  display:block;margin-bottom:4px;
  font-size:16px;font-weight:600;letter-spacing:.2em;
  color:#c9b6ff;
}
.rail h2{margin:0 0 14px;font-size:1.3rem;line-height:1.2}
.rail ul{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.rail a{
  display:flex;align-items:center;min-height:42px;padding:8px 12px;
  border-radius:8px;border:1px solid rgba(255,255,255,.16);
  color:#efe8ff;text-decoration:none;font-size:16px;line-height:1.35;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.rail a:hover,.rail a:focus-visible{background:var(--m);color:#fff;border-color:var(--m)}

/* 页脚 */
.foot{
  max-width:1180px;margin:56px auto 0;
  padding:30px 18px 6px;
  border-top:3px solid var(--ink);
}
.footgrid{display:grid;gap:28px;grid-template-columns:1fr}
.foot address{font-style:normal;display:grid;gap:12px;justify-items:start}
.fbrand{
  display:inline-flex;align-items:center;min-height:44px;
  font-size:20px;font-weight:700;color:var(--ink);text-decoration:none;
}
.fcontact{
  display:inline-flex;align-items:center;min-height:44px;padding:0 18px;
  border-radius:999px;background:var(--p);color:#fff;
  text-decoration:none;font-weight:600;font-size:16px;
  transition:background .2s ease;
}
.fcontact:hover,.fcontact:focus-visible{background:var(--m)}
.subform{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.subform input{
  flex:1 1 170px;min-height:48px;padding:0 14px;
  border:2px solid var(--line);border-radius:10px;
  background:#fff;color:var(--ink);font:inherit;font-size:16px;
}
.subform input:focus{outline:none;border-color:var(--p)}
.subform button{
  min-height:48px;padding:0 22px;border:0;border-radius:10px;
  background:var(--ink);color:#fff;font:inherit;font-weight:600;font-size:16px;
  cursor:pointer;transition:background .2s ease;
}
.subform button:hover:enabled{background:var(--m)}
.subform button:disabled{opacity:.6;cursor:default}
.footlinks ul{
  list-style:none;margin:0;padding:0;
  display:grid;gap:4px;grid-template-columns:1fr 1fr;
}
.footlinks a{
  display:flex;align-items:center;min-height:44px;padding:0 8px;
  border-radius:8px;color:var(--ink);text-decoration:none;font-size:16px;
  transition:background .2s ease,color .2s ease;
}
.footlinks a:hover,.footlinks a:focus-visible{background:var(--soft);color:var(--p)}
.copy{
  margin:26px 0 0;padding:16px 0;
  text-align:center;font-size:16px;line-height:1.5;color:#5b5470;
  border-top:1px dashed var(--line);
}

/* 底部固定条 */
.dock{
  position:fixed;left:10px;right:10px;bottom:10px;z-index:60;
  padding:8px;
  background:#fff;border:2px solid var(--ink);border-radius:16px;
  box-shadow:0 -8px 28px -12px rgba(28,23,38,.45);
}
.docklist{
  display:flex;gap:6px;margin:0;padding:2px;
  list-style:none;overflow-x:auto;
  scroll-snap-type:x proximity;scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}
.docklist::-webkit-scrollbar{display:none}
.ditem{position:relative;flex:0 0 auto;scroll-snap-align:start}
.ditem > a{
  display:flex;align-items:center;min-height:46px;padding:6px 14px;
  border-radius:10px;color:var(--ink);text-decoration:none;
  font-size:16px;font-weight:600;white-space:nowrap;
  transition:background .2s ease,color .2s ease;
}
.ditem > a:hover,.ditem > a:focus-visible{background:var(--p);color:#fff}
.sub{
  position:absolute;left:0;bottom:calc(100% + 12px);
  min-width:158px;margin:0;padding:8px;list-style:none;
  background:#fff;border:2px solid var(--ink);border-radius:12px;
  box-shadow:0 20px 32px -20px rgba(28,23,38,.55);
  display:none;
}
.ditem:hover > .sub,.ditem:focus-within > .sub{display:block}
.sub li a{
  display:flex;align-items:center;min-height:44px;padding:8px 10px;
  border-radius:8px;color:var(--ink);text-decoration:none;font-size:16px;
  transition:background .2s ease,color .2s ease;
}
.sub li a:hover,.sub li a:focus-visible{background:var(--m);color:#fff}

/* 回到顶部 */
.totop{
  position:fixed;right:14px;bottom:92px;z-index:55;
  display:inline-flex;align-items:center;min-height:44px;padding:0 16px;
  border-radius:999px;background:var(--ink);color:#fff;
  text-decoration:none;font-size:16px;font-weight:600;
  box-shadow:var(--shadow);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,background .2s ease,visibility .25s;
}
.totop.on{opacity:1;visibility:visible;transform:none}
.totop:hover,.totop:focus-visible{background:var(--m)}

/* 滚动淡入 */
html.js-anim .hero,
html.js-anim .content > article{opacity:0;transform:translateY(16px)}
html.js-anim .hero.in,
html.js-anim .content > article.in{
  opacity:1;transform:none;
  transition:opacity .5s ease,transform .5s ease;
}

/* 桌面 */
@media (min-width:720px){
  .footgrid{grid-template-columns:1.15fr 1fr;gap:40px}
  .content > article{padding:34px 34px}
}
@media (min-width:960px){
  body{padding-bottom:128px}
  .page{grid-template-columns:minmax(0,1fr) 272px;gap:48px;padding-top:36px}
  .rail{position:sticky;top:96px}
  .dock{left:auto;right:auto;left:50%;transform:translateX(-50%);width:min(1100px,calc(100% - 32px))}
  .docklist{justify-content:center;overflow:visible}
  .hero{padding:48px 44px 52px}
}

/* 移动端子菜单收敛 */
@media (max-width:719px){
  .sub{display:none}
  .ditem:hover > .sub,.ditem:focus-within > .sub{display:none}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
}

button[aria-expanded]{min-width:44px;min-height:44px}