@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{
  --sun:#F9B233;
  --ink:#2F2A3A;
  --mint:#7ED0B8;
  --paper:#FFFCF4;
  --sun-soft:#FFE2A6;
  --mint-soft:#DDF5EC;
  --line:#E8DDC6;
  --font:'Nunito','DM Sans',system-ui,-apple-system,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

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

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

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font);
  font-size:17px;
  line-height:1.72;
  overflow-x:hidden;
}

img{max-width:100%;display:block;}
a{color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}

/* ---------- 顶栏：品牌独占一行，菜单走全屏遮罩 ---------- */
.top{
  position:sticky;
  top:0;
  z-index:100;
  background:var(--paper);
  border-bottom:2px solid var(--ink);
  transition:background .25s ease;
}

.brandrow{
  max-width:1080px;
  margin:0 auto;
  padding:8px 18px;
  display:flex;
  align-items:center;
  gap:10px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:9px;
  text-decoration:none;
  color:var(--ink);
  font-weight:900;
  font-size:19px;
  letter-spacing:.02em;
  min-height:44px;
  transition:color .25s ease;
}

.branddot{
  width:20px;height:20px;
  border-radius:50% 50% 50% 6px;
  background:var(--sun);
  box-shadow:inset -4px -4px 0 rgba(47,42,58,.18);
  flex:0 0 auto;
}

.logo{width:34px;height:34px;object-fit:cover;border-radius:50% 50% 50% 8px;}

.call{
  margin-left:auto;
  text-decoration:none;
  font-weight:800;
  font-size:15px;
  color:var(--ink);
  background:var(--mint);
  padding:10px 14px;
  min-height:44px;
  display:inline-flex;
  align-items:center;
  box-shadow:4px 4px 0 rgba(47,42,58,.22);
  transition:transform .15s ease, box-shadow .15s ease;
}
.call:hover{transform:translate(2px,2px);box-shadow:2px 2px 0 rgba(47,42,58,.22);}

.burger{
  width:46px;height:46px;
  flex:0 0 auto;
  border:2px solid var(--ink);
  background:#fff;
  padding:0;
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:5px;
  cursor:pointer;
  box-shadow:4px 4px 0 rgba(47,42,58,.22);
}
.burger span{
  display:block;
  width:20px;height:2px;
  background:var(--ink);
  transition:transform .25s ease, opacity .2s ease;
}

body.menu-open .burger span:nth-child(1){transform:translateY(7px) rotate(45deg);}
body.menu-open .burger span:nth-child(2){opacity:0;}
body.menu-open .burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
body.menu-open .burger{background:var(--sun);}

body.menu-open .top{background:var(--ink);border-bottom-color:var(--sun);}
body.menu-open .brand,
body.menu-open .brandname{color:var(--paper);}
body.menu-open .burger span{background:var(--ink);}

/* ---------- 全屏菜单 ---------- */
.menu{
  position:fixed;
  inset:0;
  z-index:90;
  background:var(--ink);
  padding:86px 20px 30px;
  overflow-y:auto;
  display:flex;
  align-items:center;
  justify-content:center;
  opacity:0;
  visibility:hidden;
  transition:opacity .3s ease, visibility .3s ease;
}
body.menu-open .menu{opacity:1;visibility:visible;}

.menu ol{
  list-style:none;
  margin:0;
  padding:0;
  width:min(520px,100%);
}

.menu li + li{border-top:1px solid rgba(255,255,255,.16);}

.menu a{
  display:flex;
  align-items:center;
  gap:14px;
  padding:14px 6px;
  min-height:52px;
  text-decoration:none;
  color:#fff;
  font-weight:800;
  font-size:20px;
  transition:color .2s ease, padding-left .2s ease;
}
.menu a:hover,.menu a:focus-visible{color:var(--sun);padding-left:14px;}

.menu .num{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--mint);
  border:1px solid rgba(126,208,184,.6);
  padding:2px 6px;
  flex:0 0 auto;
}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;
  min-height:100vh;
  min-height:100svh;
  display:grid;
  place-items:center;
  text-align:center;
  padding:100px 20px 170px;
  background:var(--ink);
  overflow:hidden;
  isolation:isolate;
}

.hero-bg{position:absolute;inset:0;z-index:0;will-change:transform;}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.34;filter:saturate(1.15);}
.hero-bg.blob{
  background:
    radial-gradient(closest-side at 22% 28%, rgba(249,178,51,.55), transparent 70%),
    radial-gradient(closest-side at 78% 66%, rgba(126,208,184,.5), transparent 70%);
}

.hero::before{
  content:"";
  position:absolute;
  top:-12%;left:-10%;
  width:60vh;height:60vh;
  background:var(--sun);
  opacity:.16;
  border-radius:50%;
  z-index:0;
  animation:drift 14s ease-in-out infinite alternate;
}

.hero::after{
  content:"";
  position:absolute;
  left:-12%;right:-12%;
  bottom:-2px;
  height:10vh;
  min-height:58px;
  background:var(--paper);
  border-radius:50% 50% 0 0 / 100% 100% 0 0;
  z-index:1;
}

.hero-inner{position:relative;z-index:2;max-width:820px;}

.kicker{
  display:inline-flex;
  align-items:center;
  gap:5px;
  font-size:15px;
  font-weight:900;
  letter-spacing:.18em;
  color:var(--mint);
  margin-bottom:16px;
  animation:rise .7s cubic-bezier(.2,.85,.2,1) both;
}

.type{
  display:inline-block;
  overflow:hidden;
  white-space:nowrap;
  width:0;
  animation:typ 1s steps(5) .25s forwards;
}

.caret{
  width:2px;height:17px;
  background:var(--sun);
  animation:blink .9s steps(1) infinite;
}

.hero-title{
  font-size:clamp(32px,7.2vw,66px);
  line-height:1.16;
  font-weight:900;
  letter-spacing:-.01em;
  background:linear-gradient(98deg,var(--sun) 8%,#FFF0C6 48%,var(--mint) 92%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  animation:rise .9s cubic-bezier(.2,.85,.2,1) .1s both;
}

.hero-sub{
  margin:20px auto 0;
  max-width:32ch;
  font-size:17px;
  color:#EDEAF3;
  animation:rise .9s cubic-bezier(.2,.85,.2,1) .5s both;
}

.hero-mini{
  margin-top:30px;
  font-size:14px;
  letter-spacing:.24em;
  color:var(--sun);
  animation:rise 1s cubic-bezier(.2,.85,.2,1) .8s both;
}

@keyframes typ{to{width:3.7em;}}
@keyframes blink{50%{opacity:0;}}
@keyframes rise{from{opacity:0;transform:translateY(24px);}to{opacity:1;transform:none;}}
@keyframes drift{from{transform:translate3d(0,0,0) scale(1);}to{transform:translate3d(24vw,10vh,0) scale(1.2);}}

/* ---------- 正文骨架 ---------- */
main{display:block;}

article{
  max-width:1080px;
  margin:0 auto;
  padding:0 18px;
}

.cols{
  display:grid;
  grid-template-columns:minmax(0,1fr) 296px;
  gap:40px;
  align-items:start;
  padding:46px 0 70px;
}

.content{min-width:0;}

.lead-h{
  font-size:clamp(20px,3.2vw,26px);
  font-weight:900;
  line-height:1.35;
  margin-bottom:22px;
}

.lead-h > span,
.content h2 > span,
.content h3 > span,
.side h2 > span{
  background-image:linear-gradient(var(--sun-soft),var(--sun-soft));
  background-repeat:no-repeat;
  background-size:100% 11px;
  background-position:0 92%;
}

.content > div{
  padding:26px 0 32px;
  border-bottom:3px solid var(--line);
  scroll-margin-top:96px;
}
.content > div:last-child{border-bottom:0;padding-bottom:8px;}

.content h2{
  font-size:clamp(20px,3.3vw,26px);
  font-weight:900;
  line-height:1.38;
  letter-spacing:.01em;
  margin:0 0 16px;
}

.content h3{
  font-size:18px;
  font-weight:900;
  line-height:1.45;
  margin:24px 0 10px;
}

.content h2 + p,.content h3 + p{margin-top:0;}

.content p{margin:0 0 15px;}
.content p:last-child{margin-bottom:0;}

.content ul,.content ol{margin:0 0 15px;padding-left:1.35em;}
.content li{margin:0 0 7px;}

.content a{
  color:var(--ink);
  text-decoration:none;
  box-shadow:inset 0 -2px 0 var(--sun);
  font-weight:700;
}
.content a:hover{background:var(--sun-soft);}

.content strong{font-weight:900;}

.content blockquote{
  margin:0 0 16px;
  padding:14px 18px;
  background:var(--mint-soft);
  border-left:6px solid var(--mint);
  font-weight:700;
}

.content table{
  width:100%;
  display:block;
  overflow-x:auto;
  border-collapse:collapse;
  margin:0 0 18px;
  font-size:16px;
}
.content th,.content td{
  border:2px solid var(--ink);
  padding:9px 11px;
  text-align:left;
}
.content th{background:var(--sun-soft);font-weight:900;white-space:nowrap;}

.content img{
  border:3px solid var(--ink);
  box-shadow:7px 7px 0 rgba(249,178,51,.55);
  margin:6px 0 20px;
}

.content code,.content pre{
  font-family:var(--mono);
  font-size:15px;
  background:#fff;
  border:2px solid var(--ink);
}
.content code{padding:1px 5px;}
.content pre{padding:12px 14px;overflow-x:auto;margin:0 0 18px;}
.content pre code{border:0;padding:0;}

.content hr{border:0;border-top:3px dashed var(--line);margin:26px 0;}

/* ---------- 侧栏 ---------- */
.side{
  position:sticky;
  top:96px;
  display:grid;
  gap:18px;
  min-width:0;
}

.side-box{
  background:#fff;
  border:2px solid var(--ink);
  padding:16px 18px;
  box-shadow:6px 6px 0 var(--sun-soft);
}

.side h2{
  font-size:17px;
  font-weight:900;
  margin:0 0 10px;
  line-height:1.4;
}

.side p{font-size:15px;line-height:1.65;color:#4A4459;}

.sidelist{list-style:none;margin:0;padding:0;}
.sidelist li + li{border-top:1px dashed var(--line);}
.sidelist a{
  display:block;
  padding:9px 0;
  min-height:42px;
  text-decoration:none;
  font-weight:700;
  font-size:15px;
  color:var(--ink);
}
.sidelist a:hover{color:#8A6512;}

/* ---------- 页脚 ---------- */
.foot{
  background:var(--ink);
  color:#fff;
  border-top:8px solid var(--sun);
  padding:40px 18px 22px;
}

.foot-cols{
  max-width:1080px;
  margin:0 auto;
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:26px;
}

.foot dl{margin:0;min-width:0;}
.foot dt{
  color:var(--sun);
  font-weight:900;
  font-size:14px;
  letter-spacing:.14em;
  margin-bottom:8px;
}
.foot dd{
  margin:0;
  font-size:15px;
  line-height:1.65;
  color:#DCD6E6;
  word-break:break-word;
}

.flinks{display:flex;flex-direction:column;}
.flinks a{
  text-decoration:none;
  color:#fff;
  padding:6px 0;
  min-height:40px;
  display:flex;
  align-items:center;
  font-weight:700;
}
.flinks a:hover{color:var(--sun);}

.host{
  font-family:var(--mono);
  font-size:14px;
  color:var(--mint);
  letter-spacing:.02em;
}

.mega{
  max-width:1080px;
  margin:34px auto 0;
  font-size:clamp(34px,10.5vw,104px);
  font-weight:900;
  line-height:1;
  letter-spacing:-.02em;
  color:rgba(249,178,51,.32);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

.copy{
  max-width:1080px;
  margin:14px auto 0;
  padding-top:14px;
  border-top:1px solid rgba(255,255,255,.16);
  font-size:14px;
  color:#B8B2C6;
}

/* ---------- 滚动入场 ---------- */
body.js .reveal{
  opacity:0;
  transform:translateY(22px);
  transition:opacity .6s ease, transform .65s cubic-bezier(.2,.85,.2,1);
}
body.js .reveal.in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  .cols{grid-template-columns:minmax(0,1fr);gap:34px;padding-top:36px;}
  .side{position:static;grid-template-columns:1fr;order:2;}
}

@media (max-width:640px){
  body{font-size:16px;}
  .brand{font-size:17px;}
  .call{font-size:14px;padding:9px 11px;}
  .hero{padding:90px 18px 150px;}
  .hero-sub{max-width:26ch;}
  .foot-cols{grid-template-columns:1fr;gap:20px;}
  .mega{white-space:normal;word-break:break-all;}
  .content img{box-shadow:5px 5px 0 rgba(249,178,51,.55);}
  .lead-h{margin-bottom:16px;}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  .hero-title,.hero-sub,.hero-mini,.kicker,.hero::before{animation:none;}
  .type{width:auto;}
  .caret{animation:none;}
  body.js .reveal{opacity:1;transform:none;transition:none;}
  .call,.burger span,.menu a{transition:none;}
}

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