@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,wght@0,400;0,500;0,700;1,400&family=Nunito:ital,wght@0,700;0,800;0,900;1,700&display=swap');

:root{
  --red:#ff0000;
  --pink:#ff1493;
  --violet:#a03bff;
  --ink:#261717;
  --ink-2:#4c3736;
  --paper:#fff6f8;
  --clay:rgba(255,255,255,.84);
  --line:rgba(38,23,23,.10);
  --shadow:0 22px 48px -24px rgba(178,0,60,.55), 0 8px 20px -14px rgba(255,20,147,.5);
  --side:272px;
}

*{box-sizing:border-box}

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

body{
  margin:0;
  font-family:"Nunito","DM Sans",system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:17px;
  line-height:1.7;
  color:var(--ink);
  background-color:var(--paper);
  background-image:
    radial-gradient(58% 42% at 10% 6%, rgba(255,0,0,.32), transparent 72%),
    radial-gradient(52% 46% at 92% 2%, rgba(255,20,147,.36), transparent 74%),
    radial-gradient(70% 55% at 84% 88%, rgba(255,110,150,.32), transparent 72%),
    radial-gradient(58% 50% at 12% 92%, rgba(150,80,255,.20), transparent 74%),
    radial-gradient(50% 40% at 48% 48%, rgba(255,196,120,.24), transparent 72%);
  background-size:200% 200%;
  background-repeat:no-repeat;
  animation:aurora 12s ease-in-out infinite alternate;
}

@keyframes aurora{
  0%{background-position:0% 0%,100% 0%,86% 100%,8% 92%,50% 46%}
  50%{background-position:18% 12%,82% 8%,64% 86%,22% 78%,58% 52%}
  100%{background-position:8% 22%,92% 16%,74% 96%,16% 84%,44% 40%}
}

/* ---------- 左侧竖栏 ---------- */
.side{
  position:fixed;
  inset:0 auto 0 0;
  width:var(--side);
  z-index:40;
  display:flex;
  flex-direction:column;
  gap:16px;
  overflow-y:auto;
  padding:28px 18px 24px;
  background:linear-gradient(180deg, rgba(255,255,255,.94), rgba(255,235,242,.86));
  border-right:1px solid rgba(255,255,255,.9);
  border-radius:0 28px 28px 0;
  box-shadow:16px 0 44px -30px rgba(178,0,60,.75);
  backdrop-filter:blur(14px);
}

.brand-name{
  margin:0;
  font-size:23px;
  font-weight:900;
  letter-spacing:-.01em;
  line-height:1.25;
  background:linear-gradient(100deg,var(--red) 6%,var(--pink) 62%,var(--violet));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

.subtitle{
  margin:8px 0 0;
  font-size:16px;
  line-height:1.55;
  color:var(--ink-2);
}

.side-nav ol{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:3px;
}

.side-nav li:nth-child(3)::before{
  content:"";
  display:block;
  height:1px;
  margin:0 8px 10px;
  background:linear-gradient(90deg, rgba(255,20,147,.45), rgba(255,20,147,0));
}

.side-nav a{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:10px 13px;
  border-radius:14px;
  color:var(--ink);
  font-size:16px;
  font-weight:700;
  text-decoration:none;
  transition:transform .22s ease, background .22s ease, color .22s ease, box-shadow .22s ease;
}

.side-nav .idx{
  font-style:normal;
  font-size:16px;
  font-weight:800;
  letter-spacing:.06em;
  color:rgba(255,20,147,.75);
}

.side-nav a:hover,
.side-nav a.on{
  transform:translateX(4px);
  background:linear-gradient(100deg, rgba(255,0,0,.14), rgba(255,20,147,.16));
  color:#b1003a;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.9), 0 10px 22px -16px rgba(178,0,60,.9);
}

.side-touch{
  margin-top:auto;
  padding-top:14px;
}

.side-touch a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:0 18px;
  border-radius:99px;
  border:1px solid rgba(255,20,147,.4);
  background:rgba(255,255,255,.75);
  color:#b1003a;
  font-weight:800;
  font-size:16px;
  text-decoration:none;
  box-shadow:inset 0 2px 0 rgba(255,255,255,.9), 0 12px 24px -18px rgba(178,0,60,.8);
}

.side-touch a:hover{
  background:linear-gradient(100deg,var(--red),var(--pink));
  color:#fff;
  border-color:transparent;
}

/* ---------- 主区 ---------- */
.main{
  margin-left:var(--side);
  padding:0 22px 44px;
  display:flex;
  flex-direction:column;
  align-items:center;
}

.hero{
  position:relative;
  width:100%;
  max-width:1080px;
  min-height:70vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:44px 0;
}

.hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(38,23,23,.18) 1px, transparent 1px);
  background-size:22px 22px;
  -webkit-mask-image:radial-gradient(72% 68% at 50% 50%, #000, transparent 78%);
  mask-image:radial-gradient(72% 68% at 50% 50%, #000, transparent 78%);
  pointer-events:none;
}

.hero-copy{
  position:relative;
  z-index:2;
  width:100%;
}

h1{
  margin:0 auto;
  max-width:17em;
  text-align:center;
  font-size:clamp(30px,5.1vw,56px);
  line-height:1.16;
  font-weight:900;
  letter-spacing:-.015em;
  background:linear-gradient(105deg,var(--red) 8%,var(--pink) 58%,var(--violet));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

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

.shot{
  position:absolute;
  width:clamp(116px,17vw,208px);
  aspect-ratio:3/4;
  object-fit:cover;
  border-radius:24px;
  border:5px solid rgba(255,255,255,.92);
  box-shadow:0 26px 46px -24px rgba(150,0,60,.8);
}

.shot-1{top:8%;left:1%;transform:rotate(-6deg)}
.shot-2{bottom:6%;right:1%;transform:rotate(5deg)}

/* ---------- 正文 ---------- */
.body{
  width:100%;
  max-width:860px;
  margin-top:10px;
  padding:clamp(20px,3.6vw,46px);
  background:var(--clay);
  border-radius:28px;
  box-shadow:var(--shadow), inset 0 2px 0 rgba(255,255,255,.95), inset 0 -4px 0 rgba(255,20,147,.10);
  backdrop-filter:blur(10px);
}

.body section{
  scroll-margin-top:86px;
}

.body section + section{
  margin-top:34px;
  padding-top:30px;
  border-top:1px dashed rgba(255,20,147,.3);
}

.body h2{
  position:relative;
  margin:0 0 16px;
  padding-left:20px;
  font-size:clamp(21px,2.5vw,28px);
  line-height:1.35;
  font-weight:900;
  letter-spacing:-.01em;
  color:#3b0f28;
}

.body h2::before{
  content:"";
  position:absolute;
  left:0;
  top:.18em;
  bottom:.16em;
  width:6px;
  border-radius:99px;
  background:linear-gradient(180deg,var(--red),var(--pink) 70%,var(--violet));
  box-shadow:0 0 14px rgba(255,20,147,.55);
}

.body h3{
  margin:26px 0 10px;
  font-size:19px;
  font-weight:800;
  color:#3b0f28;
}

.body p{
  margin:0 0 16px;
  color:var(--ink-2);
}

.body a{
  color:#d40047;
  text-decoration:underline;
  text-underline-offset:3px;
}

.body a:hover{color:var(--pink)}

.body strong{color:var(--ink)}

.body ul,
.body ol{
  margin:0 0 16px;
  padding-left:1.25em;
  color:var(--ink-2);
}

.body li{margin:.35em 0}

.body img{
  max-width:100%;
  height:auto;
  border-radius:18px;
}

.body blockquote{
  margin:0 0 16px;
  padding:12px 18px;
  border-left:5px solid rgba(255,20,147,.55);
  background:rgba(255,20,147,.06);
  border-radius:0 16px 16px 0;
  color:var(--ink-2);
}

/* ---------- 页脚 ---------- */
.foot{
  margin-left:var(--side);
  padding:26px 22px 48px;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:16px;
}

.foot-cta,
.foot-row{
  width:100%;
  max-width:1080px;
}

.foot-cta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:14px;
  padding:26px 22px;
  border-radius:26px;
  color:#fff;
  background:linear-gradient(115deg, rgba(255,0,0,.94), rgba(255,20,147,.9) 62%, rgba(160,59,255,.9));
  box-shadow:0 28px 52px -28px rgba(190,0,70,.9), inset 0 2px 0 rgba(255,255,255,.4);
}

.foot-cta p{
  margin:0;
  font-size:clamp(20px,2.8vw,26px);
  font-weight:900;
  letter-spacing:-.01em;
}

.foot-cta a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 22px;
  border-radius:99px;
  border:1px solid rgba(255,255,255,.6);
  background:rgba(255,255,255,.18);
  color:#fff;
  font-weight:800;
  font-size:16px;
  text-decoration:none;
  transition:background .2s ease, color .2s ease;
}

.foot-cta a:hover{
  background:#fff;
  color:#d40047;
}

.foot-row{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:12px;
  padding:12px 18px;
  border-radius:20px;
  background:rgba(255,255,255,.72);
  box-shadow:var(--shadow);
  backdrop-filter:blur(8px);
}

.foot-logo{
  font-weight:900;
  font-size:17px;
  color:#c4003c;
}

.foot-copy{
  text-align:right;
  font-size:16px;
  color:var(--ink-2);
}

.foot-nav ul{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:2px;
  margin:0;
  padding:0;
  list-style:none;
}

.foot-nav a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:0 11px;
  border-radius:99px;
  color:var(--ink-2);
  font-size:16px;
  text-decoration:none;
}

.foot-nav a:hover{
  background:rgba(255,20,147,.14);
  color:#c4003c;
}

/* ---------- 按钮 ---------- */
.menu-btn{display:none}

.to-top{
  position:fixed;
  right:16px;
  bottom:16px;
  z-index:50;
  min-height:44px;
  padding:0 18px;
  border-radius:99px;
  border:1px solid rgba(255,255,255,.85);
  background:rgba(255,255,255,.88);
  color:#c4003c;
  font:inherit;
  font-weight:800;
  font-size:16px;
  cursor:pointer;
  box-shadow:var(--shadow);
  backdrop-filter:blur(8px);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .24s ease, transform .24s ease, visibility .24s;
}

.to-top.show{
  opacity:1;
  visibility:visible;
  transform:none;
}

/* ---------- 移动端 ---------- */
@media (max-width:900px){
  .side{
    width:min(300px,86vw);
    transform:translateX(-100%);
    transition:transform .3s ease;
    border-radius:0 24px 24px 0;
  }

  body.menu-open .side{transform:none}

  body.menu-open::after{
    content:"";
    position:fixed;
    inset:0;
    z-index:35;
    background:rgba(38,23,23,.32);
  }

  .menu-btn{
    display:inline-flex;
    align-items:center;
    position:fixed;
    top:12px;
    left:12px;
    z-index:60;
    min-height:44px;
    padding:0 20px;
    border-radius:99px;
    border:1px solid rgba(255,255,255,.9);
    background:rgba(255,255,255,.92);
    color:#c4003c;
    font:inherit;
    font-weight:800;
    font-size:16px;
    cursor:pointer;
    box-shadow:var(--shadow);
    backdrop-filter:blur(8px);
  }

  .main,
  .foot{margin-left:0}

  .main{padding:0 14px 32px}
  .foot{padding:20px 14px 40px}

  .hero{
    min-height:0;
    flex-direction:column;
    padding:82px 0 26px;
  }

  .hero-shots{
    position:static;
    display:flex;
    justify-content:center;
    gap:12px;
    margin-top:22px;
  }

  .shot{
    position:static;
    width:min(44%,200px);
    transform:rotate(-2deg);
  }

  .shot-2{transform:rotate(2deg)}

  .body{
    border-radius:22px;
    padding:20px 17px;
  }

  .body section{scroll-margin-top:74px}

  .foot-row{
    grid-template-columns:1fr;
    justify-items:center;
    text-align:center;
    padding:16px;
  }

  .foot-copy{
    text-align:center;
    font-size:16px;
  }

  .to-top{right:12px;bottom:12px}
}

@media (max-width:420px){
  .side-nav a{font-size:16px}
  h1{font-size:clamp(27px,8.4vw,34px)}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  body{animation:none}
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition:none !important;
  }
}

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