/* SITXO 希云 · 全站公共样式（纸艺风格） */
:root{
  --desk:#EDE3D3;--paper:#FBF7EF;--paper2:#F6F0E4;--ink:#2B2A33;--mute:#7A7163;--line:rgba(80,60,30,.14);
  --blue:#3A63D8;--blue2:#5B7FF0;--sky:#9CC5F2;--coral:#F2866B;--mint:#86CFAE;--butter:#F6CF6A;--lav:#B7A6E8;--kraft:#C9A77C;--green:#5FB892;
  --serif:"Songti SC","Noto Serif SC","Source Han Serif SC","STSong",Georgia,serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --hand:"Kaiti SC","STKaiti","KaiTi","Noto Serif SC",serif;
  --mono:"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --ease:cubic-bezier(.2,.8,.2,1);--pop:cubic-bezier(.34,1.56,.64,1);
  --shadow:0 1px 0 rgba(90,60,20,.06),0 14px 30px -16px rgba(70,45,10,.4);
}
*{box-sizing:border-box;margin:0;padding:0}
html{background:var(--desk);scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--ink);background:var(--desk);overflow-x:hidden;-webkit-font-smoothing:antialiased}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
a,button,input,label,select,textarea,[tabindex]{-webkit-tap-highlight-color:transparent}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font-family:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
img,svg{display:block}
body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.5;transform:translateZ(0);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.75' numOctaves='3'/%3E%3CfeColorMatrix values='0 0 0 0 .45 0 0 0 0 .35 0 0 0 0 .2 0 0 0 .18 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
main,footer{position:relative;z-index:1}
main{overflow-x:clip}
section{position:relative;scroll-margin-top:76px}
.wrap{width:min(1180px,92vw);margin:0 auto}

/* ---------- 顶栏 ---------- */
header{position:fixed;top:0;left:0;right:0;z-index:50;transition:background .3s,box-shadow .3s}
header.solid{background:rgba(237,227,211,.92);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);box-shadow:0 1px 0 var(--line)}
.hbar{display:flex;align-items:center;gap:20px;padding:12px clamp(16px,3vw,40px)}
.logo{display:flex;align-items:center;gap:10px;font:800 18px var(--sans);letter-spacing:.04em}
.logo svg{width:34px;height:34px}
.logo small{font-weight:500;color:var(--mute);font-size:14px;letter-spacing:.14em;padding-left:10px;margin-left:2px;border-left:1.5px solid #C9BBA6;line-height:1}
.nav{display:flex;gap:2px;margin-left:24px}
.nav a{position:relative;padding:8px 14px;border-radius:10px;font:600 14px var(--sans);color:#4B463F;transition:background .25s,color .25s}
.nav a:hover{background:rgba(255,255,255,.6)}
.nav a.on{color:var(--ink)}
.nav a.on::after{content:"";position:absolute;left:14px;right:14px;bottom:3px;height:3px;border-radius:2px;background:var(--butter)}
.hright{margin-left:auto;display:flex;gap:10px;align-items:center}
.menu{display:none;width:42px;height:42px;border-radius:12px;border:1.5px solid var(--ink);background:var(--paper);box-shadow:2px 2px 0 var(--ink);position:relative}
.menu i,.menu i::before,.menu i::after{position:absolute;left:11px;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .3s,opacity .3s}
.menu i{top:19px}.menu i::before,.menu i::after{content:"";left:0}.menu i::before{top:-6px}.menu i::after{top:6px}
header.open .menu i{background:transparent}header.open .menu i::before{transform:translateY(6px) rotate(45deg)}header.open .menu i::after{transform:translateY(-6px) rotate(-45deg)}
.drawer{display:none}
.prog{position:absolute;left:0;bottom:-2px;height:3px;background:linear-gradient(90deg,var(--coral),var(--butter));transform-origin:0 50%;transform:scaleX(0);width:100%}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:12px;font:600 15px var(--sans);white-space:nowrap;transition:transform .3s var(--ease),box-shadow .3s,background .3s}
.btn.sm{height:40px;padding:0 16px;font-size:14px}
.btn.pri{background:var(--blue);color:#fff;box-shadow:0 3px 0 #2847A8,0 10px 20px -8px rgba(58,99,216,.6)}
.btn.pri:hover{transform:translateY(-2px);box-shadow:0 5px 0 #2847A8,0 14px 26px -8px rgba(58,99,216,.6)}
.btn.pap{background:var(--paper);color:var(--ink);border:1.5px solid var(--ink);box-shadow:3px 3px 0 var(--ink)}
.btn.pap:hover{transform:translate(-1px,-1px);box-shadow:4px 4px 0 var(--ink)}
.link{color:var(--blue);font-weight:700;display:inline-flex;gap:6px;align-items:center}
.link::after{content:"→";transition:transform .3s}
.link:hover::after{transform:translateX(4px)}

/* ---------- 文字 ---------- */
.chip{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border:1.5px solid var(--ink);border-radius:999px;background:var(--paper);font:600 12.5px var(--sans);box-shadow:2px 2px 0 var(--ink)}
.chip i{width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 0 3px rgba(95,184,146,.25)}
.kicker{font:500 13px var(--serif);letter-spacing:.3em;color:var(--coral);display:flex;align-items:center;gap:12px}
.kicker::after{content:"";width:40px;height:1px;background:currentColor;opacity:.5}
.sec-h{max-width:720px}
.sec-h.c{margin:0 auto;text-align:center}.sec-h.c .kicker{justify-content:center}.sec-h.c .kicker::before{content:"";width:40px;height:1px;background:currentColor;opacity:.5}
h1,h2,h3{font-family:var(--serif);font-weight:900;letter-spacing:-.01em;line-height:1.18}
h1{font-size:clamp(36px,4.6vw,62px)}
h2{font-size:clamp(28px,3.2vw,44px);margin-top:12px}
u{text-decoration:none;background:linear-gradient(rgba(246,207,106,.8),rgba(246,207,106,.8)) 0 88%/0% 34% no-repeat;transition:background-size 1s var(--ease) .3s}
.in u,u.in{background-size:100% 34%}
.lead{font-size:clamp(15px,1.2vw,17px);line-height:1.9;color:#4B463F;margin-top:16px;text-wrap:pretty}
.sec-h.c .lead,.phero.c .lead{text-wrap:balance}
.demo-note{font-size:12px;color:var(--mute);margin-top:10px;text-align:right}
.sec{padding:96px 0 30px}
.rv{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .8s var(--ease)}
.rv.in{opacity:1;transform:none}
.fold{opacity:0;transform:perspective(900px) rotateX(-70deg);transform-origin:50% 0;transition:opacity .5s,transform .9s var(--pop);transition-delay:calc(var(--i,0) * .1s)}
.fold.in{opacity:1;transform:none}
.card{background:var(--paper);border:1.5px solid var(--ink);border-radius:18px;box-shadow:4px 4px 0 var(--ink)}
.tape{position:absolute;top:-10px;left:50%;width:90px;height:22px;margin-left:-45px;background:rgba(183,166,232,.55);transform:rotate(-2deg);z-index:3}

/* ---------- 子页面首屏 ---------- */
.phero{padding:128px 0 40px}
.crumb{display:flex;gap:8px;align-items:center;font:600 13px var(--sans);color:var(--mute)}
.crumb a:hover{color:var(--blue)}
.crumb span::before{content:"/";margin-right:8px;opacity:.5}
.phero h1{margin-top:18px;font-size:clamp(34px,4.2vw,58px)}
.phero .lead{max-width:620px}
.phero .ctas{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.pgrid2{display:grid;grid-template-columns:1fr 1.05fr;gap:clamp(30px,5vw,70px);align-items:center}

/* ---------- 迷你网站缩略图（案例 / 结尾复用） ---------- */
.ms{background:#fff;border:1.5px solid var(--ink);border-radius:12px;overflow:hidden;display:flex;flex-direction:column}
.ms-bar{display:flex;align-items:center;gap:5px;padding:7px 9px;background:#EEF2FA;border-bottom:1.5px solid var(--ink);flex:0 0 auto}
.ms-bar>i{width:7px;height:7px;border-radius:50%;background:#F2866B}.ms-bar>i:nth-child(2){background:var(--butter)}.ms-bar>i:nth-child(3){background:var(--mint)}
.ms-bar span{flex:1;margin-left:4px;height:16px;border-radius:8px;background:#fff;font:600 9.5px/16px var(--sans);color:#6A6358;padding:0 8px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.ms-vp{position:relative;flex:1;overflow:hidden;background:#f5f1e9}
.ms-vp img{position:absolute;inset:0;display:block;width:100%;height:100%;object-fit:cover;object-position:top center}

/* ---------- FAQ ---------- */
.qa{border-bottom:1.5px dashed rgba(43,42,51,.25)}
.qa button{width:100%;display:flex;justify-content:space-between;align-items:center;gap:14px;padding:18px 4px;text-align:left;font:700 16px var(--sans)}
.qa button i{flex:0 0 28px;height:28px;border-radius:50%;border:1.5px solid var(--ink);position:relative;transition:transform .4s var(--pop),background .3s}
.qa button i::before,.qa button i::after{content:"";position:absolute;left:50%;top:50%;width:11px;height:2px;margin:-1px 0 0 -5.5px;background:var(--ink);border-radius:2px}
.qa button i::after{transform:rotate(90deg);transition:transform .3s}
.qa.open button i{background:var(--butter);transform:rotate(180deg)}
.qa.open button i::after{transform:rotate(0)}
.qa .a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .45s var(--ease)}
.qa.open .a{grid-template-rows:1fr}
.qa .a>div{overflow:hidden}
.qa .a p{padding:0 4px 18px;font-size:14.5px;line-height:1.8;color:#4B463F}
.fgrid{display:grid;grid-template-columns:.8fr 1.2fr;gap:clamp(30px,5vw,70px);align-items:start}

/* ---------- 通用结尾条 ---------- */
.endcta{padding:70px 0 100px}
.endbox{position:relative;display:flex;align-items:center;justify-content:space-between;gap:30px;padding:clamp(26px,4vw,44px);background:var(--blue);color:#fff;border:1.5px solid var(--ink);border-radius:24px;box-shadow:6px 6px 0 var(--ink);overflow:hidden}
.endbox h2{margin:0;font-size:clamp(24px,2.6vw,36px)}
.endbox p{margin-top:8px;opacity:.85;font-size:15px}
.endbox .btn.pap{flex:0 0 auto}
.endbox::before,.endbox::after{content:"";position:absolute;border-radius:50%;pointer-events:none}
.endbox::before{width:260px;height:260px;right:-60px;top:-120px;background:rgba(255,255,255,.08)}
.endbox::after{width:140px;height:140px;right:180px;bottom:-90px;background:rgba(246,207,106,.25)}

/* ---------- 提示 ---------- */
.toast{position:fixed;left:50%;bottom:28px;z-index:80;transform:translate(-50%,30px);opacity:0;padding:12px 18px;border-radius:12px;background:var(--ink);color:#fff;font:600 14px var(--sans);transition:opacity .3s,transform .4s var(--pop);pointer-events:none;max-width:90vw}
.toast.on{opacity:1;transform:translate(-50%,0)}

/* ---------- 页脚 ---------- */
footer{padding:50px 0 40px;border-top:1px solid var(--line)}
.fcols{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:30px}
.fcols h4{font:700 14px var(--sans);margin-bottom:12px}
.fcols a{display:block;font-size:13.5px;color:#4B463F;padding:4px 0}
.fcols a:hover{color:var(--blue)}
.fcols a.logo{display:flex;font:700 17px var(--sans);color:var(--ink);padding:0}
.fcols p{font-size:13.5px;color:var(--mute);line-height:1.7;margin-top:10px;max-width:300px}
.fbot{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;margin-top:34px;padding-top:18px;border-top:1px dashed var(--line);font-size:12.5px;color:var(--mute)}

@media (max-width:1080px){.nav{display:none}}
@media (max-width:900px){
  .hbar{padding:10px 14px;gap:10px}
  header{background:rgba(237,227,211,.94);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);box-shadow:0 1px 0 var(--line)}
  .logo{font-size:16px}.logo svg{width:26px;height:26px}
  .hright .pap{display:none}
  .menu{display:block}
  .drawer{display:grid;gap:4px;padding:0 14px;max-height:0;overflow:hidden;transition:max-height .45s var(--ease),padding .45s}
  header.open .drawer{max-height:520px;padding:6px 14px 16px}
  .drawer a{padding:12px 6px;border-bottom:1px dashed var(--line);font:600 15px var(--sans)}
  .drawer a.on{color:var(--blue)}
  .sec{padding-top:64px}
  .phero{padding:96px 0 24px}
  .pgrid2{grid-template-columns:minmax(0,1fr);gap:30px}
  .fgrid{grid-template-columns:1fr;gap:10px}
  .endbox{flex-direction:column;align-items:flex-start}
  .endbox .btn{width:100%}
  .fcols{grid-template-columns:1fr 1fr}
  .fcols>div:first-child{grid-column:span 2}
  .demo-note{text-align:left}
}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition-duration:.01s!important}}

/* ===== 手机端：更稳、更顺 ===== */
@media (max-width:900px){
  /* 顶栏不用毛玻璃（手机滚动时很耗性能，容易卡顿） */
  header,header.solid{background:rgba(237,227,211,.98);backdrop-filter:none;-webkit-backdrop-filter:none}
  /* 出现动画位移更小、更快，滚动时不显得晃 */
  .rv{transform:translateY(14px);transition:opacity .5s var(--ease),transform .55s var(--ease)}
  .fold{transform:translateY(16px);transition:opacity .45s,transform .55s var(--ease);transition-delay:calc(var(--i,0) * .06s)}
  /* iOS 输入框字号小于 16px 时点一下会自动放大页面 */
  input,select,textarea{font-size:16px!important}
  .phero h1{font-size:clamp(30px,8.4vw,40px)}
  h2{font-size:clamp(25px,7vw,32px)}
}
/* 触屏设备没有悬停：避免点一下后卡片一直浮起、歪着 */
@media (hover:none){
  html .btn:hover,html .btn.pri:hover,html .btn.pap:hover{transform:none}
  html .bx:hover,html .tk:hover,html .tm:hover,html .ad:hover,html .pc:hover,html .cs:hover .ms{transform:none}
  html .bx:hover{box-shadow:4px 4px 0 var(--ink)}
  html .vc:hover,html .pp:hover{transform:rotate(var(--r))}
  html .link:hover::after{transform:none}
}