/* ============================================================
   咪助网 · 高端网站设计 v4 · 基础层
   定位：高端网站设计服务商（面向企业决策者）
   10 套样式共用：reset / 全屏滚动 / 透明导航 / 通用按钮 / 动效
   各套独有排版与配色全部写在自己的 <style> 内
   ============================================================ */

:root{
  --nav-h:78px;
  --wrap:min(1320px,90vw);
  --brand:#00b056;
  --fg:#16181d;
  --muted:#6b7280;
  --line:rgba(0,0,0,.1);
  --bg:#ffffff;
  --ease:cubic-bezier(.22,1,.36,1);
  --radius:18px;
}

*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,"Segoe UI",Roboto,"Helvetica Neue",sans-serif;
  color:var(--fg);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5,p,figure,blockquote{margin:0}
button{font:inherit;border:0;background:none;cursor:pointer;color:inherit;padding:0}
input,textarea,select{font:inherit}
table{border-collapse:collapse}

/* ---------- 全屏滚动容器 ---------- */
.fp{
  height:100vh;height:100dvh;
  overflow-y:auto;overflow-x:hidden;
  scroll-snap-type:y mandatory;
  scroll-behavior:smooth;
}
.fp::-webkit-scrollbar{width:0;height:0}
.fp{scrollbar-width:none}

.sec{
  position:relative;
  min-height:100vh;min-height:100dvh;
  scroll-snap-align:start;
  scroll-snap-stop:always;
  display:flex;flex-direction:column;justify-content:center;
  overflow:hidden;
}
.sec>*{position:relative;z-index:2}
.sec .bleed{position:absolute;inset:0;z-index:0}

.wrap{width:var(--wrap);margin:0 auto}

/* ---------- 顶部进度条 ---------- */
.fp-bar{
  position:fixed;left:0;top:0;height:2px;width:0;z-index:200;
  background:var(--brand);
  transition:width .1s linear;
  pointer-events:none;
}

/* ---------- 透明导航（无独立背景色，随屏自适应字色） ---------- */
.nav{
  position:fixed;left:0;right:0;top:0;height:var(--nav-h);z-index:130;
  display:flex;align-items:center;
  background:transparent;
  color:var(--nav-fg,#fff);
  transition:color .5s var(--ease);
  pointer-events:none;
}
body[data-tone="dark"]  .nav{--nav-fg:#ffffff;--nav-line:rgba(255,255,255,.34);--nav-sub:rgba(255,255,255,.72);text-shadow:0 1px 16px rgba(0,0,0,.4)}
body[data-tone="light"] .nav{--nav-fg:#14161a;--nav-line:rgba(20,22,26,.16);--nav-sub:rgba(20,22,26,.62);text-shadow:none}
.nav *{pointer-events:auto}

.nav-inner{
  width:var(--wrap);margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;gap:28px;
}
.nav-logo{display:flex;align-items:center;gap:11px;font-weight:800;font-size:19px;letter-spacing:.01em}
.nav-logo .mark{
  width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
  font-size:17px;font-weight:800;color:#fff;background:var(--brand);flex:0 0 auto;
}
.nav-logo small{display:block;font-size:11px;font-weight:500;opacity:.66;letter-spacing:.14em;margin-top:1px}

.nav-menu{display:flex;align-items:center;gap:30px}
.nav-menu a{font-size:14.5px;font-weight:500;position:relative;padding:6px 0;opacity:.88;transition:opacity .3s}
.nav-menu a:hover,.nav-menu a.on{opacity:1}
.nav-menu a::after{
  content:"";position:absolute;left:0;bottom:0;height:1.5px;width:0;
  background:currentColor;transition:width .35s var(--ease);
}
.nav-menu a:hover::after,.nav-menu a.on::after{width:100%}

.nav-cta{
  padding:10px 22px !important;border-radius:999px;
  border:1px solid var(--nav-line);font-weight:600;
  opacity:1 !important;
}
.nav-cta::after{display:none}
.nav-cta:hover{background:currentColor}
.nav-cta:hover span{color:transparent}

.nav-burger{
  display:none;width:40px;height:40px;place-items:center;
  border-radius:10px;border:1px solid var(--nav-line);
}
.nav-burger span{display:block;width:17px;height:1.6px;background:currentColor;margin:3.4px 0;transition:.3s var(--ease)}
body.menu-open .nav-burger span:nth-child(1){transform:translateY(5px) rotate(45deg)}
body.menu-open .nav-burger span:nth-child(2){opacity:0}
body.menu-open .nav-burger span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

.nav-panel{
  position:fixed;inset:var(--nav-h) 0 auto 0;z-index:125;
  display:none;flex-direction:column;gap:2px;
  padding:20px 6vw 30px;
  background:rgba(12,14,18,.94);
  backdrop-filter:blur(16px);
}
body.menu-open .nav-panel{display:flex}
.nav-panel a{color:#fff;font-size:16px;padding:13px 4px;border-bottom:1px solid rgba(255,255,255,.09)}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:15px 32px;border-radius:999px;
  font-size:15px;font-weight:650;letter-spacing:.01em;white-space:nowrap;
  transition:transform .35s var(--ease),background .35s var(--ease),color .35s var(--ease),border-color .35s;
}
.btn-solid{background:var(--brand);color:#fff}
.btn-solid:hover{transform:translateY(-2px)}
.btn-ghost{border:1px solid currentColor;background:transparent}
.btn-ghost:hover{background:currentColor}
.btn-ghost:hover span{color:transparent}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;align-items:center}

/* ---------- 小标签 / 分割线 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12.5px;font-weight:700;letter-spacing:.24em;text-transform:uppercase;
}
.eyebrow::before{content:"";width:26px;height:1.5px;background:currentColor;opacity:.6}
.rule{height:1px;background:var(--line);border:0;margin:0}

/* ---------- 进场动效 ---------- */
.rv{opacity:0;transform:translateY(28px);transition:opacity .95s var(--ease),transform .95s var(--ease)}
.rv.in{opacity:1;transform:none}
.rv[data-d="1"]{transition-delay:.09s}
.rv[data-d="2"]{transition-delay:.18s}
.rv[data-d="3"]{transition-delay:.27s}
.rv[data-d="4"]{transition-delay:.36s}
.rv[data-d="5"]{transition-delay:.45s}
.rv[data-d="6"]{transition-delay:.54s}
.rv-l{opacity:0;transform:translateX(-34px);transition:opacity 1s var(--ease),transform 1s var(--ease)}
.rv-r{opacity:0;transform:translateX(34px);transition:opacity 1s var(--ease),transform 1s var(--ease)}
.rv-l.in,.rv-r.in{opacity:1;transform:none}
.rv-s{opacity:0;transform:scale(.94);transition:opacity 1.1s var(--ease),transform 1.1s var(--ease)}
.rv-s.in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  .rv,.rv-l,.rv-r,.rv-s{opacity:1 !important;transform:none !important;transition:none !important}
  .fp{scroll-behavior:auto}
}

/* ---------- 右侧圆点 ---------- */
.dots{
  position:fixed;right:24px;top:50%;transform:translateY(-50%);
  z-index:125;display:flex;flex-direction:column;gap:13px;
  color:#14161a;transition:color .5s var(--ease);
}
body[data-tone="dark"] .dots{color:#fff}
.dots a{
  width:7px;height:7px;border-radius:50%;background:currentColor;opacity:.3;
  transition:opacity .3s,transform .3s var(--ease);
}
.dots a.on{opacity:1;transform:scale(1.55)}

/* ---------- 滚动提示 ---------- */
.scroll-hint{
  position:absolute;left:50%;bottom:34px;transform:translateX(-50%);
  z-index:3;display:flex;flex-direction:column;align-items:center;gap:9px;
  font-size:11px;letter-spacing:.24em;opacity:.65;
}
.scroll-hint i{display:block;width:1px;height:38px;background:currentColor;opacity:.55;animation:shint 2.1s var(--ease) infinite}
@keyframes shint{0%{transform:scaleY(.2);transform-origin:top;opacity:0}40%{opacity:.8}100%{transform:scaleY(1);transform-origin:top;opacity:0}}

/* ---------- 移动端 ---------- */
@media (max-width:1024px){
  .nav-menu{display:none}
  .nav-burger{display:grid}
  .dots{display:none}
  .sec{min-height:100vh}
}
@media (max-width:640px){
  :root{--nav-h:64px}
  .nav-logo{font-size:17px}
  .nav-logo .mark{width:32px;height:32px;font-size:15px;border-radius:9px}
}