@import url('https://fonts.googleapis.com/css2?family=Chakra+Petch:wght@300;400;500;600;700&family=Russo+One&display=swap');

:root{
  --red:#ff0000;
  --violet:#8b00ff;
  --ink:#261717;
  --txt:#f4ecec;
  --dim:rgba(244,236,236,.68);
  --edge:rgba(255,255,255,.16);
  --edge-2:rgba(255,255,255,.28);
  --glass:rgba(255,255,255,.07);
  --glass-2:rgba(255,255,255,.11);
  --r:18px;
  --disp:'Russo One','Chakra Petch',system-ui,sans-serif;
  --body:'Chakra Petch','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,sans-serif;
}

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

html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  font-family:var(--body);
  font-size:17px;
  line-height:1.72;
  color:var(--txt);
  background-color:#150d0e;
  overflow-x:hidden;
  background-image:
    radial-gradient(58rem 40rem at 12% -10%, rgba(255,0,0,.42), transparent 62%),
    radial-gradient(50rem 36rem at 92% 4%, rgba(139,0,255,.44), transparent 60%),
    radial-gradient(64rem 46rem at 46% 108%, rgba(255,0,0,.18), transparent 70%),
    linear-gradient(180deg,#1d1213 0%,#2b1919 44%,#170f10 100%);
  background-attachment:fixed;
}

img{display:block;max-width:100%;height:auto}
a{color:inherit}
p{margin:0}

::selection{background:rgba(255,0,0,.42);color:#fff}

:focus-visible{
  outline:2px solid #ff6a6a;
  outline-offset:3px;
  border-radius:6px;
}

/* ---------- 顶栏 ---------- */
.masthead{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(23,14,15,.62);
  background-image:linear-gradient(180deg,rgba(255,0,0,.10),rgba(139,0,255,.10));
  border-bottom:1px solid var(--edge);
  backdrop-filter:blur(18px) saturate(150%);
  -webkit-backdrop-filter:blur(18px) saturate(150%);
}

.nav{
  max-width:1220px;
  margin:0 auto;
  padding:5px 14px;
}

.navlist{
  display:flex;
  align-items:center;
  gap:2px;
  margin:0;
  padding:0;
  list-style:none;
}

.navlist li{min-width:0}

.navlist a{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:8px 10px;
  font-size:16px;
  text-align:center;
  text-decoration:none;
  color:var(--dim);
  white-space:nowrap;
  transition:color .2s ease;
}

.navlist a::after{
  content:"";
  position:absolute;
  left:10px;
  right:10px;
  bottom:7px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--red),var(--violet));
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .26s ease;
}

.navlist a:hover,
.navlist a[aria-current="true"]{color:#fff}

.navlist a:hover::after,
.navlist a[aria-current="true"]::after{transform:scaleX(1)}

.nav-l{flex:4 1 0}
.nav-r{flex:3 1 0}

.brandcell{flex:0 0 auto;padding:0 8px}

.navlist .brand{
  display:block;
  padding:8px 6px;
  font-family:var(--disp);
  font-size:21px;
  letter-spacing:.05em;
  color:transparent;
  background:linear-gradient(96deg,#ffffff,#ffb5b5 42%,#d6a6ff 82%);
  -webkit-background-clip:text;
  background-clip:text;
  filter:drop-shadow(0 4px 14px rgba(255,0,0,.35));
}

.navlist .brand::after{display:none}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;
  isolation:isolate;
  display:grid;
  place-items:center;
  min-height:100vh;
  min-height:100svh;
  padding:92px 20px 78px;
  overflow:hidden;
}

.ghost{
  position:absolute;
  left:50%;
  top:50%;
  transform:translate(-50%,-50%);
  z-index:0;
  font-family:var(--disp);
  font-size:clamp(74px,20vw,240px);
  line-height:1;
  letter-spacing:.01em;
  white-space:nowrap;
  color:transparent;
  -webkit-text-stroke:1.5px rgba(255,255,255,.15);
  pointer-events:none;
  user-select:none;
}

.halo{
  position:absolute;
  z-index:0;
  width:min(70vw,620px);
  aspect-ratio:1;
  border-radius:50%;
  background:
    radial-gradient(circle at 35% 32%, rgba(255,0,0,.50), transparent 58%),
    radial-gradient(circle at 68% 70%, rgba(139,0,255,.52), transparent 60%);
  filter:blur(70px);
  opacity:.85;
  pointer-events:none;
}

.hero-art{
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
}

.art{
  position:absolute;
  margin:0;
  width:min(38vw,290px);
  aspect-ratio:4/5;
  overflow:hidden;
  border-radius:var(--r);
  border:1px solid var(--edge-2);
  background:rgba(255,255,255,.06);
  box-shadow:0 30px 80px rgba(0,0,0,.6),0 0 0 6px rgba(255,255,255,.03);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
}

.art.a{left:2%;top:15%;transform:rotate(-4deg)}
.art.b{right:2%;bottom:13%;transform:rotate(4deg)}
.art img{width:100%;height:100%;object-fit:cover}

.hero-copy{
  position:relative;
  z-index:2;
  max-width:820px;
  text-align:center;
}

.hero-copy h1{
  margin:0 0 16px;
  font-family:var(--disp);
  font-size:clamp(33px,6.2vw,68px);
  line-height:1.14;
  letter-spacing:.01em;
  color:#fff;
  background:linear-gradient(100deg,#ffffff 6%,#ff9696 40%,#c79bff 76%,#ffffff 98%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  filter:drop-shadow(0 10px 26px rgba(0,0,0,.62));
}

.lede{
  max-width:34em;
  margin:0 auto;
  font-size:clamp(16px,1.6vw,18px);
  line-height:1.7;
  color:rgba(255,255,255,.82);
  text-shadow:0 2px 18px rgba(0,0,0,.7);
}

.cue{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:46px;
  height:46px;
  margin-top:26px;
  font-size:20px;
  color:#fff;
  text-decoration:none;
  border-radius:50%;
  border:1px solid var(--edge-2);
  background:rgba(255,255,255,.09);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  animation:bob 2.6s ease-in-out infinite;
}

.cue:hover{background:rgba(255,0,0,.28);border-color:rgba(255,255,255,.5)}

@keyframes bob{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(6px)}
}

/* ---------- 正文区 ---------- */
.wrap{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:minmax(0,1fr) 268px;
  gap:26px;
  align-items:start;
  max-width:1180px;
  margin:0 auto;
  padding:0 20px 88px;
}

.sheet{
  padding:clamp(20px,3vw,40px);
  border-radius:var(--r);
  border:1px solid var(--edge);
  background:var(--glass);
  box-shadow:0 30px 90px rgba(0,0,0,.46),inset 0 1px 0 rgba(255,255,255,.14);
  backdrop-filter:blur(16px) saturate(130%);
  -webkit-backdrop-filter:blur(16px) saturate(130%);
}

.doc section{scroll-margin-top:96px}

.doc section + section{
  margin-top:46px;
  padding-top:42px;
  border-top:1px solid rgba(255,255,255,.12);
}

.doc h2{
  margin:0 0 4px;
  font-family:var(--disp);
  font-size:clamp(21px,2.5vw,29px);
  line-height:1.26;
  letter-spacing:.01em;
  color:#fff;
}

.doc h3{
  margin:30px 0 4px;
  font-size:19px;
  line-height:1.4;
  color:#ffd6d6;
}

.doc p{
  margin:14px 0;
  color:rgba(255,255,255,.86);
}

.doc hr{
  height:1px;
  margin:10px 0 20px;
  border:0;
  background:linear-gradient(90deg,var(--red),var(--violet) 46%,rgba(255,255,255,0));
}

.doc a{
  color:#ffb2b2;
  text-underline-offset:3px;
  text-decoration-thickness:1px;
}

.doc a:hover{color:#fff}

.doc ul,.doc ol{
  margin:14px 0;
  padding-left:1.25em;
  color:rgba(255,255,255,.86);
}

.doc li{margin:7px 0}

.doc strong{color:#fff}

.doc blockquote{
  margin:20px 0;
  padding:12px 18px;
  border-left:3px solid var(--violet);
  border-radius:0 12px 12px 0;
  background:rgba(255,255,255,.06);
  color:rgba(255,255,255,.9);
}

.doc img{
  margin:20px 0;
  border-radius:14px;
  border:1px solid var(--edge);
}

.doc table{
  display:block;
  width:100%;
  overflow-x:auto;
  margin:20px 0;
  border-collapse:collapse;
  font-size:16px;
}

.doc th,.doc td{
  padding:10px 12px;
  border:1px solid rgba(255,255,255,.14);
  text-align:left;
}

.doc th{background:rgba(255,255,255,.07);color:#fff}

/* ---------- 侧栏 ---------- */
.side{
  position:sticky;
  top:86px;
  align-self:start;
}

.side-in{
  padding:18px 16px;
  border-radius:var(--r);
  border:1px solid var(--edge);
  background:var(--glass-2);
  box-shadow:0 22px 60px rgba(0,0,0,.42),inset 0 1px 0 rgba(255,255,255,.16);
  backdrop-filter:blur(14px) saturate(130%);
  -webkit-backdrop-filter:blur(14px) saturate(130%);
}

.side h2{
  margin:0 0 8px;
  font-family:var(--disp);
  font-size:18px;
  letter-spacing:.05em;
  color:#fff;
}

.side hr{
  height:1px;
  margin:0 0 10px;
  border:0;
  background:linear-gradient(90deg,var(--violet),rgba(255,255,255,0));
}

.sidelines{
  counter-reset:s;
  margin:0;
  padding:0;
  list-style:none;
}

.sidelines li{
  counter-increment:s;
  border-top:1px solid rgba(255,255,255,.08);
}

.sidelines li:first-child{border-top:0}

.sidelines a{
  display:flex;
  align-items:center;
  min-height:44px;
  font-size:16px;
  color:var(--dim);
  text-decoration:none;
  transition:color .2s ease,padding-left .2s ease;
}

.sidelines a::before{
  content:counter(s,decimal-leading-zero);
  margin-right:9px;
  font-family:var(--disp);
  font-size:12px;
  letter-spacing:.06em;
  color:rgba(255,0,0,.85);
}

.sidelines a:hover{
  color:#fff;
  padding-left:5px;
}

/* ---------- 页脚 ---------- */
.foot{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:26px;
  max-width:1180px;
  margin:0 auto;
  padding:46px 20px 26px;
  border-top:1px solid var(--edge);
  background-image:linear-gradient(180deg,rgba(255,255,255,.05),rgba(0,0,0,0));
}

.foot h3{
  margin:0 0 8px;
  font-family:var(--disp);
  font-size:16px;
  letter-spacing:.06em;
  color:#fff;
}

.foot hr{
  height:1px;
  margin:0 0 12px;
  border:0;
  background:linear-gradient(90deg,rgba(255,0,0,.9),rgba(139,0,255,.6) 52%,rgba(255,255,255,0));
}

.footlist{
  margin:0;
  padding:0;
  list-style:none;
}

.footlist a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  font-size:16px;
  color:var(--dim);
  text-decoration:none;
  transition:color .2s ease;
}

.footlist a:hover{color:#fff}

.fbrand{
  margin:0;
  font-family:var(--disp);
  font-size:19px;
  letter-spacing:.05em;
  color:#ffd2d2;
}

.fback{margin:0}

.totop{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:0 16px;
  font-size:16px;
  color:#fff;
  text-decoration:none;
  border-radius:999px;
  border:1px solid var(--edge-2);
  background:rgba(255,255,255,.07);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  transition:background .2s ease,border-color .2s ease;
}

.totop:hover{
  background:rgba(255,0,0,.3);
  border-color:rgba(255,255,255,.5);
}

.cr{
  grid-column:1/-1;
  margin:4px 0 0;
  padding-top:18px;
  border-top:1px solid rgba(255,255,255,.1);
  font-size:16px;
  color:rgba(255,255,255,.52);
}

/* ---------- 动效 ---------- */
@keyframes rise{
  from{opacity:0;transform:translateY(16px)}
  to{opacity:1;transform:translateY(0)}
}

.navlist li{animation:rise .5s cubic-bezier(.2,.7,.3,1) both}
.navlist li:nth-child(1){animation-delay:.03s}
.navlist li:nth-child(2){animation-delay:.07s}
.navlist li:nth-child(3){animation-delay:.11s}
.navlist li:nth-child(4){animation-delay:.15s}
.navlist li:nth-child(5){animation-delay:.19s}
.navlist li:nth-child(6){animation-delay:.23s}
.navlist li:nth-child(7){animation-delay:.27s}
.navlist li:nth-child(8){animation-delay:.31s}

.doc > section{animation:rise .6s cubic-bezier(.2,.7,.3,1) both}
.doc > section:nth-child(1){animation-delay:.06s}
.doc > section:nth-child(2){animation-delay:.12s}
.doc > section:nth-child(3){animation-delay:.18s}
.doc > section:nth-child(4){animation-delay:.24s}
.doc > section:nth-child(5){animation-delay:.3s}
.doc > section:nth-child(6){animation-delay:.36s}
.doc > section:nth-child(7){animation-delay:.42s}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-delay:0s !important;
    transition-duration:.001ms !important;
  }
}

/* ---------- 断点 ---------- */
@media (max-width:960px){
  .wrap{grid-template-columns:minmax(0,1fr);gap:22px}
  .side{position:static;order:2}
  .sidelines{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:14px}
  .sidelines li:first-child{border-top:1px solid rgba(255,255,255,.08)}
}

@media (max-width:760px){
  .masthead{position:static}
  .nav{padding:4px 12px 8px}
  .navlist{flex-wrap:wrap;justify-content:center;gap:2px 4px}
  .navlist .nav-l,
  .navlist .nav-r{flex:0 0 auto}
  .brandcell{order:-1;flex:0 0 100% !important;text-align:center}
  .navlist .brand{font-size:20px;padding:10px 6px}
  .navlist a{padding:10px 9px;min-height:44px}

  .hero{min-height:88svh;padding:60px 18px 64px}
  .art{width:44vw}
  .art.a{left:-8%;top:9%;opacity:.72}
  .art.b{right:-8%;bottom:8%;opacity:.72}
  .ghost{font-size:clamp(64px,26vw,150px)}

  .doc section{scroll-margin-top:20px}
  .foot{grid-template-columns:minmax(0,1fr);gap:18px;padding:38px 20px 22px}
  .sidelines{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:420px){
  body{font-size:17px}
  .wrap{padding:0 14px 70px}
  .hero{padding:48px 14px 56px}
}

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