@import url('https://fonts.googleapis.com/css2?family=Lexend+Mega:wght@100..900&family=Public+Sans:wght@100..900&display=swap');

:root{
  --ink:#1c1726;
  --deep:#120d1c;
  --vi:#6514ff;
  --mag:#bf00ff;
  --text:#f2ecff;
  --dim:#bdaee0;
  --line:rgba(191,0,255,.3);
  --soft:rgba(255,255,255,.06);
  --font-d:'Lexend Mega','Public Sans',system-ui,'PingFang SC','Microsoft YaHei',sans-serif;
  --font-b:'Public Sans',system-ui,-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
}

*,*::before,*::after{box-sizing:border-box}

html{
  scroll-behavior:smooth;
  background:var(--deep);
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  padding-bottom:104px;
  font-family:var(--font-b);
  font-size:17px;
  line-height:1.75;
  color:var(--text);
  background-color:var(--ink);
  background-image:
    radial-gradient(780px 540px at 8% -8%,rgba(101,20,255,.5),transparent 62%),
    radial-gradient(700px 500px at 94% 0%,rgba(191,0,255,.34),transparent 60%),
    repeating-linear-gradient(118deg,rgba(255,255,255,.045) 0 2px,transparent 2px 28px);
  background-repeat:no-repeat,no-repeat,repeat;
  animation:drift 26s ease-in-out infinite alternate;
  -webkit-font-smoothing:antialiased;
}

@keyframes drift{
  from{background-position:0 0,0 0,0 0}
  to{background-position:70px 44px,-56px 32px,30px 0}
}

h1,h2,h3{font-family:var(--font-d);font-weight:900;letter-spacing:-.02em;line-height:1.1}

a{color:#d3bdff}

img,svg{max-width:100%}

:focus-visible{outline:2px solid var(--mag);outline-offset:3px}

/* 角落品牌标 */
.mark{
  position:fixed;
  top:14px;
  left:14px;
  z-index:80;
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:48px;
  padding:8px 16px 8px 12px;
  border-radius:14px;
  border:1px solid var(--line);
  background:rgba(18,13,28,.78);
  backdrop-filter:blur(10px);
  color:var(--text);
  text-decoration:none;
  font-family:var(--font-d);
  font-size:13px;
  letter-spacing:.12em;
  transition:background .22s ease,transform .22s ease;
}
.mark:hover{background:rgba(101,20,255,.5);transform:translateY(-2px)}
.mark-glyph{display:block}
.mark img{display:block;width:22px;height:22px;object-fit:contain;border-radius:6px}

.shell{
  max-width:1120px;
  margin:0 auto;
  padding:0 20px 40px;
}

/* Hero */
.hero{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  gap:48px;
  align-items:center;
  min-height:100svh;
  padding:116px 0 64px;
}

.hero-copy{text-align:center}

h1{
  margin:0 0 20px;
  font-size:clamp(2.1rem,5.6vw,4rem);
  line-height:1.06;
  letter-spacing:-.035em;
  background:linear-gradient(104deg,#ffffff 6%,#dbcbff 54%,var(--mag) 98%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  -webkit-text-fill-color:transparent;
}

.lede{
  max-width:52ch;
  margin:0 auto 28px;
  font-size:1.06rem;
  color:var(--dim);
}

.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  justify-content:center;
  margin:0;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:50px;
  padding:12px 26px;
  border-radius:14px;
  border:2px solid transparent;
  background:linear-gradient(100deg,var(--vi),var(--mag));
  color:#fff;
  font-family:var(--font-d);
  font-size:15px;
  letter-spacing:.05em;
  text-decoration:none;
  box-shadow:0 16px 32px -16px rgba(101,20,255,.95);
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 22px 36px -16px rgba(191,0,255,.95)}
.btn.ghost{background:transparent;border-color:var(--line);color:var(--text);box-shadow:none}
.btn.ghost:hover{background:rgba(191,0,255,.18)}

.hero-art{
  position:relative;
  margin:0;
  aspect-ratio:4/5;
  border-radius:18px;
  overflow:hidden;
  border:1px solid var(--line);
  background:linear-gradient(150deg,rgba(101,20,255,.55),rgba(191,0,255,.22) 62%,rgba(28,23,38,.92));
  box-shadow:0 34px 74px -36px rgba(191,0,255,.85);
  will-change:transform;
}
.hero-img{display:block;width:100%;height:100%;object-fit:cover}
.hero-fill{display:block;width:100%;height:100%}

.chip{
  position:absolute;
  left:16px;
  bottom:16px;
  margin:0;
  padding:9px 16px;
  border-radius:12px;
  background:rgba(18,13,28,.88);
  border:1px solid var(--line);
  color:#fff;
  font-family:var(--font-d);
  font-size:12px;
  letter-spacing:.16em;
  backdrop-filter:blur(6px);
}

/* 正文区 */
.band{
  display:grid;
  grid-template-columns:236px minmax(0,1fr);
  gap:48px;
  align-items:start;
  padding:56px 0 24px;
  border-top:1px solid var(--soft);
}

.rail{
  position:sticky;
  top:96px;
  padding:18px;
  border-radius:18px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.05);
  backdrop-filter:blur(8px);
  box-shadow:0 22px 44px -30px rgba(0,0,0,.9);
}
.rail h2{
  margin:0;
  font-size:17px;
  letter-spacing:.14em;
}
.rail hr,.cta hr{
  height:2px;
  margin:12px 0 16px;
  border:0;
  background:linear-gradient(90deg,var(--mag),rgba(191,0,255,0));
}
.rail-list,.dock-list{
  margin:0;
  padding:0;
  list-style:none;
}
.rail-list{display:grid;gap:3px}
.rail-list a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:8px 12px;
  border-radius:12px;
  color:var(--text);
  text-decoration:none;
  font-size:15px;
  line-height:1.4;
  transition:background .2s ease,color .2s ease;
}
.rail-list a:hover{background:rgba(101,20,255,.42)}

.prose{min-width:0}

.prose div{
  padding:40px 0;
  border-bottom:1px dashed rgba(255,255,255,.14);
  scroll-margin-top:32px;
}
.prose div:last-child{border-bottom:0;padding-bottom:8px}

.prose h2{
  margin:0 0 6px;
  font-size:clamp(1.5rem,3.1vw,2.2rem);
  line-height:1.16;
}
.prose h3{
  margin:28px 0 8px;
  font-size:1.2rem;
  color:#e6d9ff;
}
.prose p{margin:0 0 18px;line-height:1.8}
.prose a{font-weight:600;text-decoration-color:rgba(191,0,255,.6);text-underline-offset:3px}
.prose a:hover{color:#fff;text-decoration-color:#fff}
.prose ul,.prose ol{padding-left:1.25em;margin:0 0 18px}
.prose li{margin-bottom:8px}
.prose img{display:block;width:100%;height:auto;margin:20px 0;border-radius:18px}
.prose blockquote{
  margin:22px 0;
  padding:16px 20px;
  border-left:4px solid var(--vi);
  border-radius:0 18px 18px 0;
  background:rgba(101,20,255,.16);
}
.prose blockquote p:last-child{margin-bottom:0}
.prose table{width:100%;border-collapse:collapse;margin:20px 0;font-size:16px}
.prose th,.prose td{padding:10px 12px;border-bottom:1px solid rgba(255,255,255,.14);text-align:left}
.prose figure{margin:22px 0}
.prose figcaption{font-size:14px;color:var(--dim);margin-top:8px}
.prose hr{height:2px;border:0;background:linear-gradient(90deg,var(--vi),transparent);margin:22px 0}

/* 页脚 */
.foot{
  margin-top:48px;
  padding:56px 20px 28px;
  border-top:1px solid var(--line);
  background:rgba(10,7,16,.62);
}

.cta{
  max-width:1120px;
  margin:0 auto 44px;
  padding:34px 30px;
  border-radius:18px;
  border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(101,20,255,.4),rgba(191,0,255,.18));
  box-shadow:0 30px 64px -40px rgba(191,0,255,.9);
}
.cta h2{
  margin:0;
  font-size:clamp(1.6rem,4vw,2.6rem);
  line-height:1.1;
}
.cta-act{margin:0}

.foot-grid{
  display:grid;
  grid-template-columns:minmax(0,1.2fr) minmax(0,1fr) minmax(0,1fr);
  gap:32px;
  max-width:1120px;
  margin:0 auto;
}

.foot address{
  font-style:normal;
  font-family:var(--font-d);
  font-size:14px;
  letter-spacing:.12em;
  color:var(--text);
}
.foot address strong{display:block;font-size:16px}

.foot ul{
  margin:0;
  padding:0;
  list-style:none;
  display:grid;
  gap:2px;
}
.foot ul a{
  display:flex;
  align-items:center;
  min-height:42px;
  padding:6px 0;
  color:var(--dim);
  text-decoration:none;
  font-size:15px;
  transition:color .2s ease,padding-left .2s ease;
}
.foot ul a:hover{color:#fff;padding-left:6px}

.colophon{
  max-width:1120px;
  margin:38px auto 0;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,.1);
  text-align:center;
  font-size:14px;
  color:var(--dim);
}

/* 底部固定菜单条 */
.dock{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:90;
  display:flex;
  justify-content:center;
  padding:12px 16px calc(12px + env(safe-area-inset-bottom));
  background:rgba(15,10,24,.92);
  border-top:1px solid var(--line);
  backdrop-filter:blur(12px);
}
.dock details{position:relative}

.dock summary{
  display:inline-flex;
  align-items:center;
  gap:12px;
  min-height:50px;
  padding:0 26px;
  border-radius:999px;
  background:linear-gradient(100deg,var(--vi),var(--mag));
  color:#fff;
  font-family:var(--font-d);
  font-size:14px;
  letter-spacing:.16em;
  cursor:pointer;
  box-shadow:0 18px 34px -18px rgba(191,0,255,.95);
  transition:transform .22s ease;
}
.dock summary::-webkit-details-marker{display:none}
.dock summary::after{
  content:"";
  width:8px;
  height:8px;
  border-right:2px solid #fff;
  border-bottom:2px solid #fff;
  transform:rotate(45deg) translateY(-2px);
  transition:transform .22s ease;
}
.dock details[open] summary{transform:translateY(-2px)}
.dock details[open] summary::after{transform:rotate(-135deg) translateY(-2px)}

.dock-list{
  position:absolute;
  bottom:calc(100% + 14px);
  left:50%;
  transform:translateX(-50%);
  width:max-content;
  max-width:calc(100vw - 32px);
  display:grid;
  grid-template-columns:repeat(2,minmax(142px,1fr));
  gap:6px;
  padding:14px;
  border-radius:18px;
  border:1px solid var(--line);
  background:rgba(16,11,26,.98);
  box-shadow:0 28px 64px -22px rgba(0,0,0,.95);
}
.dock-list a{
  display:flex;
  align-items:center;
  min-height:44px;
  padding:8px 12px;
  border-radius:12px;
  color:var(--text);
  text-decoration:none;
  font-size:15px;
  line-height:1.4;
  transition:background .2s ease;
}
.dock-list a:hover{background:rgba(101,20,255,.45)}

/* 进入动效 */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .32s ease,transform .32s cubic-bezier(.2,.7,.3,1)}
.reveal.is-in{opacity:1;transform:none}

@media (max-width:880px){
  .hero{
    grid-template-columns:minmax(0,1fr);
    gap:36px;
    min-height:100svh;
    padding:104px 0 44px;
  }
  .hero-art{aspect-ratio:4/3;max-height:52svh}
  .band{grid-template-columns:minmax(0,1fr);gap:32px;padding-top:40px}
  .rail{position:static}
  .rail-list{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot-grid{grid-template-columns:minmax(0,1fr);gap:22px}
  .cta{padding:26px 22px}
}

@media (max-width:520px){
  body{font-size:16px}
  .shell{padding:0 16px 24px}
  .dock-list{grid-template-columns:minmax(0,1fr);max-height:60svh;overflow:auto}
  .mark{padding:7px 12px;font-size:12px;gap:8px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .btn{width:100%}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  body{animation:none}
  .reveal{opacity:1;transform:none;transition:none}
  .btn,.mark,.dock summary{transition:none}
}

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