/* =========================================================
   fishzzz.com — 网站性能与运维服务
   设计基调：单色 · 大字重 · 深浅色块交替 · 颜色只由跑分截图提供
   纯静态 · 无框架 · 无外部依赖
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:76px;background:#000}

:root{
  /* 深色区（默认） */
  --bg:#000;
  --tx:#f5f5f7;
  --tx-2:#a1a1a6;
  --tx-3:#6e6e73;
  --panel:#141416;
  --panel-2:#1c1c1f;
  --line:rgba(255,255,255,.12);
  --line-2:rgba(255,255,255,.24);
  --accent:#2997ff;

  --paper:#f5f5f7;
  --ink:#1d1d1f;
  --ink-2:#6e6e73;

  --r:18px; --r-l:24px; --r-xl:32px;
  --sp:clamp(72px,9vw,132px);
  --wrap:1080px;
  --wrap-wide:1240px;
}

body{
  background:var(--bg);
  color:var(--tx);
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:17px;line-height:1.6;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
  font-synthesis-weight:none;
}
img,svg{display:block;max-width:100%}
img{height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul{list-style:none}
::selection{background:rgba(41,151,255,.32)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}

.skip{position:absolute;left:-9999px;top:0;z-index:999;padding:12px 20px;background:#fff;color:#000;border-radius:0 0 10px 0}
.skip:focus{left:0}

/* ---------- 2. 区块与深浅切换 ---------- */
.wrap{width:min(100% - 44px,var(--wrap));margin-inline:auto}
.wrap-w{width:min(100% - 44px,var(--wrap-wide));margin-inline:auto}
.sec{padding-block:var(--sp);position:relative;background:var(--bg);color:var(--tx)}
.sec--tight{padding-block:calc(var(--sp) * .66)}

/* 浅色区：只换语义变量，组件样式不用重写 */
.sec--light{
  --bg:var(--paper);
  --tx:var(--ink);
  --tx-2:var(--ink-2);
  --tx-3:#86868b;
  --panel:#fff;
  --panel-2:#fff;
  --line:rgba(0,0,0,.10);
  --line-2:rgba(0,0,0,.22);
  --accent:#0071e3;
}
.sec--paper{--bg:#fff;--tx:var(--ink);--tx-2:var(--ink-2);--tx-3:#86868b;
  --panel:var(--paper);--panel-2:#ececee;--line:rgba(0,0,0,.10);--line-2:rgba(0,0,0,.22);--accent:#0071e3}
/* 深色区之间也拉开一点层次，避免整屏死黑 */
.sec--deep{--bg:#0a0a0c;--panel:#161619;--panel-2:#1e1e22}

/* 全站极淡颗粒：让大面积纯色不显得"空" */
.grain{position:fixed;inset:0;z-index:200;pointer-events:none;opacity:.05;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/></filter><rect width='140' height='140' filter='url(%23n)'/></svg>")}

/* 首屏顶部的一层冷光，压住黑得发闷的感觉 */
.glow{position:absolute;top:-32%;left:50%;translate:-50% 0;width:min(1180px,132vw);aspect-ratio:1.5;
  pointer-events:none;z-index:0;
  background:radial-gradient(ellipse at center,rgba(130,170,255,.16),rgba(255,255,255,.05) 34%,transparent 66%)}
/* overflow:hidden 把超出视口的光晕裁掉，否则窄屏会多出横向滚动 */
.hero{position:relative;isolation:isolate;overflow:hidden}
.hero>*:not(.glow){position:relative;z-index:1}

.center{text-align:center}
.sec-head{max-width:720px;margin-bottom:clamp(44px,6vw,72px)}
.sec-head.center{margin-inline:auto}

/* ---------- 3. 排版 ----------
   中文排版三件套：balance 让标题各行长度均衡、pretty 避免段落末行孤字、
   strict 让标点不出现在行首行尾 */
h1,h2,h3,h4{font-weight:600;line-height:1.14;letter-spacing:-.022em;
  text-wrap:balance;line-break:strict;overflow-wrap:break-word}
.h1{font-size:clamp(36px,6.6vw,76px);font-weight:700;letter-spacing:-.03em;line-height:1.1}
.h2{font-size:clamp(27px,4.2vw,50px);font-weight:700;letter-spacing:-.027em;line-height:1.14}
.h3{font-size:clamp(19px,2.1vw,25px);font-weight:600;letter-spacing:-.018em;line-height:1.28}
.h4{font-size:19px;font-weight:600;letter-spacing:-.014em}
.lead{font-size:clamp(16.5px,1.7vw,20px);line-height:1.62;color:var(--tx-2);margin-top:22px;
  letter-spacing:-.01em;text-wrap:pretty;line-break:strict}
p{text-wrap:pretty;line-break:strict}
.lead b,.lead strong{color:var(--tx);font-weight:600}
.small{font-size:15px;line-height:1.6}
.muted{color:var(--tx-3)}
.dim{color:var(--tx-2)}

.eyebrow{
  display:block;font-size:clamp(17px,1.8vw,21px);font-weight:600;
  letter-spacing:-.01em;color:var(--accent);margin-bottom:12px;
}

/* ---------- 4. 头部 ---------- */
.head{position:sticky;top:0;z-index:100;background:rgba(0,0,0,.72);
  backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid transparent;transition:border-color .3s}
.head.is-stuck{border-bottom-color:rgba(255,255,255,.10)}
.head-in{display:flex;align-items:center;gap:16px;height:56px}

.brand{display:flex;align-items:center;gap:9px;flex-shrink:0;color:var(--tx)}
.brand svg{width:26px;height:26px;flex-shrink:0}
.brand b{font-size:19px;font-weight:600;letter-spacing:-.02em}

.nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav a:not(.btn){padding:7px 13px;border-radius:8px;font-size:14px;font-weight:400;color:var(--tx-2);
  transition:color .2s;white-space:nowrap}
.nav a:not(.btn):hover{color:var(--tx)}
.nav a:not(.btn)[aria-current="page"]{color:var(--tx)}
.nav .btn{margin-left:10px}

.burger{display:none;width:38px;height:38px;border-radius:9px;align-items:center;justify-content:center;margin-left:auto}
.burger span{display:block;width:17px;height:1.5px;background:var(--tx);border-radius:2px;position:relative;transition:.25s}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:17px;height:1.5px;background:var(--tx);border-radius:2px;transition:.25s}
.burger span::before{top:-5.5px}.burger span::after{top:5.5px}
.burger[aria-expanded="true"] span{background:transparent}
.burger[aria-expanded="true"] span::before{top:0;transform:rotate(45deg)}
.burger[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg)}

/* ---------- 5. 按钮与链接 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:12px 22px;border-radius:980px;font-size:16px;font-weight:400;line-height:1.2;
  border:1px solid transparent;transition:background .2s,color .2s,border-color .2s,opacity .2s;text-align:center}
.btn-p{background:var(--accent);color:#fff}
.btn-p:hover{filter:brightness(1.12)}
.btn-g{border-color:var(--line-2);color:var(--tx)}
.btn-g:hover{background:var(--tx);color:var(--bg);border-color:var(--tx)}
.btn-sm{padding:7px 16px;font-size:14px}
.btn-lg{padding:14px 28px;font-size:17px}
.btns{display:flex;gap:14px 28px;flex-wrap:wrap;margin-top:34px;align-items:center}
.center .btns{justify-content:center}

/* 苹果式文字链接 */
.lnk{display:inline-flex;align-items:center;gap:3px;color:var(--accent);font-size:16px;transition:opacity .2s}
.lnk:hover{opacity:.72;text-decoration:underline;text-underline-offset:3px}
.lnk::after{content:"›";font-size:1.28em;line-height:0;position:relative;top:-.02em;transition:transform .2s}
.lnk:hover::after{transform:translateX(2px)}
.lnk-lg{font-size:19px}

/* ---------- 6. 首屏 ---------- */
.hero{padding-block:clamp(48px,6vw,84px) clamp(56px,7vw,92px);text-align:center;
  background-image:linear-gradient(180deg,#0e1118 0%,#05060a 45%,#000 100%)}
.hero .lead{max-width:720px;margin-inline:auto}
.hero-l{text-align:left}
.hero-l .lead{margin-inline:0}

/* 首屏里的真实报告：白底截图是整屏唯一的亮面，也是唯一的颜色来源 */
.hero-proof{margin:clamp(40px,5.5vw,64px) auto 0;max-width:860px;position:relative}
.hero-proof img{width:100%;border-radius:16px;background:#fff;
  box-shadow:0 50px 90px -40px rgba(0,0,0,.95), 0 0 0 1px rgba(255,255,255,.14),
             0 0 90px -30px rgba(130,170,255,.35)}
.hero-proof figcaption{margin-top:16px;font-size:13px;color:var(--tx-3);letter-spacing:-.005em}

/* 中文断行：只在通顺的地方断。窄屏放开，否则长句会顶出屏幕 */
.nw{white-space:nowrap}
@media (max-width:440px){ .nw{white-space:normal} }

/* 大数字组 */
.figures{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px 24px;
  margin-top:clamp(52px,7vw,84px);padding-top:clamp(36px,4vw,52px);border-top:1px solid var(--line)}
.fig{text-align:center}
/* nowrap：别让「48」和「小时」被拆到两行 */
.fig b{display:block;font-size:clamp(36px,5vw,58px);font-weight:600;letter-spacing:-.035em;line-height:1.05;
  font-variant-numeric:tabular-nums;color:var(--tx);white-space:nowrap}
.fig b i{font-style:normal;font-size:.42em;font-weight:500;letter-spacing:-.01em;margin-left:2px}
/* 必须是直接子元素：否则会连 <b> 里的数字 <span data-num> 一起选中，
   把数字压成 13.5px 灰字，比单位还小 */
.fig>span{display:block;font-size:13.5px;color:var(--tx-3);margin-top:12px;line-height:1.5;
  letter-spacing:-.005em;text-wrap:balance}

/* 信任条 */
.trust{display:flex;gap:10px 26px;flex-wrap:wrap;margin-top:30px;justify-content:center}
.hero-l .trust{justify-content:flex-start}
.trust li{display:inline-flex;align-items:center;gap:7px;font-size:15px;color:var(--tx-2)}
.trust li b{color:var(--tx);font-weight:600}
.trust li svg{width:15px;height:15px;color:var(--tx-3);flex-shrink:0}

/* ---------- 7. 卡片 ---------- */
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}

.card{background:var(--panel);border-radius:var(--r-l);padding:clamp(26px,3vw,38px);position:relative;
  isolation:isolate;--mx:50%;--my:0%;
  transition:transform .4s cubic-bezier(.22,.7,.25,1),box-shadow .4s}
.card:hover{transform:translateY(-4px);box-shadow:0 22px 50px -28px rgba(0,0,0,.7)}
/* 顶边高光：一条极淡的亮线，卡片就不是一块死色 */
.card::before{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;z-index:2;
  border:1px solid var(--line);
  -webkit-mask-image:linear-gradient(#000,transparent 60%);mask-image:linear-gradient(#000,transparent 60%)}
/* 鼠标跟随的柔光 */
.card::after{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;z-index:1;
  opacity:0;transition:opacity .4s;
  background:radial-gradient(300px circle at var(--mx) var(--my),rgba(255,255,255,.07),transparent 68%)}
.card:hover::after{opacity:1}
.sec--light .card::after{background:radial-gradient(300px circle at var(--mx) var(--my),rgba(0,0,0,.045),transparent 68%)}
.card>*{position:relative;z-index:3}
.card h3{margin-bottom:12px}
.card p{color:var(--tx-2);font-size:16px;line-height:1.6}
.card p+p{margin-top:14px}

.ic{width:26px;height:26px;stroke-width:1.5;color:var(--tx);margin-bottom:22px;flex-shrink:0}
.ic-sm{width:19px;height:19px;stroke-width:1.6;flex-shrink:0}

/* 服务卡 */
.svc{display:flex;flex-direction:column}
.svc-top{display:flex;align-items:baseline;justify-content:space-between;gap:18px;margin-bottom:14px}
.svc-top h3{margin:0}
.price{flex-shrink:0;font-size:15px;color:var(--tx-3);letter-spacing:-.01em}
.price b{font-size:26px;font-weight:600;color:var(--tx);letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.svc ul{margin:20px 0 26px;display:grid;gap:11px}
.svc ul li,.list li{display:flex;gap:11px;font-size:15.5px;color:var(--tx-2);line-height:1.55}
.svc ul li b,.list li b{color:var(--tx);font-weight:600}
.svc ul li svg,.list li svg{margin-top:.28em;color:var(--tx-3)}
.svc .lnk{margin-top:auto}

.list{display:grid;gap:11px}

/* ---------- 8. 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;counter-reset:s}
.step{padding-top:22px;border-top:1px solid var(--line)}
.step::before{counter-increment:s;content:counter(s);display:block;font-size:14px;font-weight:600;
  color:var(--tx-3);margin-bottom:14px;font-variant-numeric:tabular-nums}
.step h4{margin-bottom:9px}
.step p{font-size:15px;color:var(--tx-2);line-height:1.55}

/* ---------- 9. 案例截图 ---------- */
.cases{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.case{background:var(--panel);border-radius:var(--r-l);overflow:hidden;transition:transform .35s cubic-bezier(.25,.6,.3,1)}
.case:hover{transform:translateY(-3px)}
.case-h{display:flex;align-items:center;gap:12px;padding:18px 22px 0}
.case-h .no{font-size:13px;font-weight:600;color:var(--tx-3);font-variant-numeric:tabular-nums;flex-shrink:0}
.case-h .lock{font-size:13px;color:var(--tx-3);min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  display:inline-flex;align-items:center;gap:6px}
.case-h .lock svg{width:12px;height:12px;flex-shrink:0}
.case-h .tag{margin-left:auto;font-size:12px;font-weight:500;color:var(--tx-2);border:1px solid var(--line);
  border-radius:980px;padding:3px 10px;flex-shrink:0;white-space:nowrap}
.shot{padding:16px 22px 0}
.shot-lab{display:flex;align-items:center;gap:7px;font-size:13px;color:var(--tx-3);margin-bottom:10px}
.shot-lab svg{width:14px;height:14px}
.shot img{width:100%;border-radius:10px;background:#fff;border:1px solid var(--line)}
.case-f{display:flex;flex-wrap:wrap;gap:8px 20px;padding:20px 22px 22px}
.sc{display:inline-flex;align-items:baseline;gap:6px;font-size:14px;font-weight:600;color:var(--tx);
  font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.sc s{text-decoration:none;color:var(--tx-3);font-weight:400;font-size:13px}
.note{font-size:14px;color:var(--tx-3);text-align:center;margin-top:36px;line-height:1.8}
.note b{color:var(--tx-2);font-weight:600}

/* 客户页面实拍缩略图 */
.case-f--col{flex-direction:column;align-items:flex-start;gap:18px}
.thumbs{display:flex;align-items:flex-end;gap:10px}
.thumb{height:88px;width:auto;border-radius:6px;border:1px solid var(--line);background:#fff;flex-shrink:0}
.thumbcap{font-size:11.5px;color:var(--tx-3);line-height:1.45;align-self:flex-end;padding-bottom:2px}
.chips{display:flex;flex-wrap:wrap;gap:8px 20px}

/* 全站成绩表折叠 */
.tabledetails>summary{list-style:none;cursor:pointer;display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:500;color:var(--accent);padding:12px 24px;border-radius:980px;
  border:1px solid var(--line);transition:background .2s,border-color .2s}
.tabledetails>summary::-webkit-details-marker{display:none}
.tabledetails>summary:hover{border-color:var(--line-2)}
.tabledetails>summary::after{content:"+";font-size:1.15em;line-height:1}
.tabledetails[open]>summary::after{content:"−"}
.tabledetails{text-align:center}
.tabledetails .tablebox{text-align:left}

/* 筛选（苹果式分段控件） */
.filters{display:inline-flex;gap:2px;padding:2px;border-radius:980px;background:var(--panel-2);
  margin-bottom:clamp(30px,4vw,44px)}
.filters button{padding:8px 20px;border-radius:980px;font-size:14px;font-weight:500;color:var(--tx-2);transition:.2s}
.filters button:hover{color:var(--tx)}
.filters button[aria-pressed="true"]{background:var(--bg);color:var(--tx);box-shadow:0 1px 3px rgba(0,0,0,.22)}
.sec--light .filters button[aria-pressed="true"]{background:#fff}
.filters-wrap{text-align:center}
.cases.f-m .shot--d,.cases.f-d .shot--m{display:none}

/* ---------- 10. 全站逐页表格 ---------- */
.tablebox{border-radius:var(--r-l);background:var(--panel);overflow:hidden}
.tablescroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
table.pages{width:100%;border-collapse:collapse;font-size:14.5px;min-width:620px}
table.pages th,table.pages td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line)}
table.pages th{font-size:12.5px;font-weight:600;color:var(--tx-3);letter-spacing:.02em;
  position:sticky;top:0;background:var(--panel);z-index:1;white-space:nowrap}
table.pages tbody tr:last-child td{border-bottom:0}
table.pages td.pg{color:var(--tx);font-weight:500;letter-spacing:-.01em}
table.pages td.n{font-variant-numeric:tabular-nums;color:var(--tx-2);text-align:right;white-space:nowrap}
table.pages td.n b{color:var(--tx);font-weight:600}
table.pages tbody tr:hover{background:var(--panel-2)}
.tablefoot{padding:16px 20px;font-size:13px;color:var(--tx-3);border-top:1px solid var(--line);text-align:center}

/* ---------- 11. 价格 ---------- */
.plans{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.plan{display:flex;flex-direction:column;padding:clamp(26px,2.6vw,34px);border-radius:var(--r-l);background:var(--panel);
  position:relative;transition:transform .35s cubic-bezier(.25,.6,.3,1)}
.plan:hover{transform:translateY(-3px)}
.plan.hot{outline:1.5px solid var(--line-2);outline-offset:-1.5px}
.plan .flag{font-size:12px;font-weight:600;color:var(--accent);margin-bottom:10px;letter-spacing:-.005em}
.plan h3{font-size:19px;font-weight:600;margin-bottom:18px}
.plan .p{font-size:46px;font-weight:600;line-height:1;letter-spacing:-.035em;font-variant-numeric:tabular-nums}
.plan .p s{text-decoration:none;font-size:22px;font-weight:500;margin-right:1px}
.plan .u{font-size:14px;color:var(--tx-3);margin:12px 0 24px}
.plan ul{display:grid;gap:10px;margin-bottom:28px}
.plan ul li{display:flex;gap:10px;font-size:15px;color:var(--tx-2);line-height:1.5}
.plan ul li svg{margin-top:.24em;color:var(--tx-3)}
.plan .btn{margin-top:auto;width:100%}

/* ---------- 12. FAQ ---------- */
.faq{max-width:820px;margin-inline:auto;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;padding:24px 44px 24px 0;font-size:18px;font-weight:500;
  letter-spacing:-.015em;position:relative;transition:color .2s}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--accent)}
.faq summary::after,.faq summary::before{content:"";position:absolute;right:6px;top:50%;background:var(--tx-3);
  transition:transform .28s cubic-bezier(.25,.6,.3,1),background .2s}
.faq summary::after{width:15px;height:1.5px;margin-top:-.75px}
.faq summary::before{width:1.5px;height:15px;margin-top:-7.5px;right:12.75px}
.faq details[open] summary::before{transform:rotate(90deg);opacity:0}
.faq details[open] summary::after{background:var(--accent)}
.faq .a{padding:0 24px 28px 0;color:var(--tx-2);font-size:16px;line-height:1.65}
.faq .a p+p{margin-top:14px}
.faq .a b{color:var(--tx);font-weight:600}

/* ---------- 13. 检测入口 ---------- */
.tool{text-align:center}
.tool form{display:flex;gap:10px;max-width:520px;margin:30px auto 0;flex-wrap:wrap}
.tool input{flex:1;min-width:220px;padding:13px 20px;border-radius:980px;background:var(--panel);
  border:1px solid var(--line);color:var(--tx);font-size:16px;transition:border-color .2s}
.tool input::placeholder{color:var(--tx-3)}
.tool input:focus{outline:none;border-color:var(--accent)}
.hint{font-size:13px;color:var(--tx-3);margin-top:18px}

/* ---------- 14. 联系 ---------- */
.contact-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;max-width:660px;margin:38px auto 0}
.cc{display:flex;align-items:center;gap:15px;padding:22px;border-radius:var(--r);background:var(--panel);
  text-align:left;transition:transform .3s cubic-bezier(.25,.6,.3,1)}
.cc:hover{transform:translateY(-3px)}
.cc svg.ci{width:26px;height:26px;stroke-width:1.5;color:var(--tx-2);flex-shrink:0}
.cc .t{display:block;font-size:13px;color:var(--tx-3);line-height:1.4}
.cc .v{display:block;font-size:18px;font-weight:600;letter-spacing:-.02em;margin-top:3px}
.cc .copy{margin-left:auto;font-size:13px;padding:6px 14px;border-radius:980px;border:1px solid var(--line-2);
  color:var(--tx-2);white-space:nowrap;transition:.2s;flex-shrink:0}
.cc .copy:hover{background:var(--tx);color:var(--bg);border-color:var(--tx)}
.cc.is-copied .copy{background:var(--tx);color:var(--bg);border-color:var(--tx)}

/* 微信二维码：悬停浮层，平时不占版面 */
.cc-wx.has-qr{position:relative;cursor:pointer}
.qrpop{position:absolute;bottom:calc(100% + 14px);left:50%;translate:-50% 0;z-index:30;
  display:flex;flex-direction:column;align-items:center;gap:10px;padding:14px;
  border-radius:18px;background:#1c1c1f;border:1px solid rgba(255,255,255,.16);
  box-shadow:0 30px 60px -20px rgba(0,0,0,.9);
  opacity:0;visibility:hidden;transform:translateY(8px) scale(.96);transform-origin:bottom center;
  transition:opacity .26s cubic-bezier(.22,.7,.25,1),transform .26s cubic-bezier(.22,.7,.25,1),visibility .26s}
.qrpop::after{content:"";position:absolute;top:100%;left:50%;translate:-50% -1px;
  border:8px solid transparent;border-top-color:#1c1c1f}
.qrpop img{width:184px;height:auto;border-radius:10px;background:#fff;display:block}
.qrpop span{font-size:13px;color:#a1a1a6;white-space:nowrap}
.cc-wx.has-qr:hover .qrpop,
.cc-wx.has-qr:focus-visible .qrpop,
.cc-wx.has-qr.open .qrpop{opacity:1;visibility:visible;transform:none}

/* 悬浮按钮上的二维码 */
.dock .tip-qr{display:flex;flex-direction:column;align-items:center;gap:8px;padding:12px;border-radius:16px}
.dock .tip-qr img{width:160px;height:auto;border-radius:9px;background:#fff;display:block}
.dock .tip-qr b{font-size:13px;font-weight:600}
.dock .tip-qr i{font-style:normal;font-size:12px;color:#a1a1a6}

/* ---------- 15. 页脚 ---------- */
.foot{background:var(--paper);color:var(--ink);padding-block:clamp(44px,5vw,62px) 28px;font-size:13px;line-height:1.5}
.foot-grid{display:grid;grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));gap:34px}
.foot h4{font-size:13px;font-weight:600;margin-bottom:14px;color:var(--ink)}
.foot ul{display:grid;gap:9px}
.foot a,.foot p{color:#6e6e73;transition:color .2s}
.foot a:hover{color:var(--ink);text-decoration:underline;text-underline-offset:2px}
.foot .brand{color:var(--ink);margin-bottom:14px}
.foot-bot{margin-top:36px;padding-top:20px;border-top:1px solid rgba(0,0,0,.12);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;color:#86868b}

/* ---------- 16. 悬浮联系 ---------- */
.dock{position:fixed;right:20px;bottom:20px;z-index:90;display:flex;flex-direction:column;gap:9px}
.dock a{width:46px;height:46px;border-radius:50%;display:grid;place-items:center;position:relative;
  background:rgba(28,28,31,.86);border:1px solid rgba(255,255,255,.14);color:#f5f5f7;
  backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);
  transition:background .22s,transform .22s}
.dock a:hover{background:#f5f5f7;color:#000;transform:scale(1.06)}
.dock a svg{width:20px;height:20px;stroke-width:1.6}
.dock a .tip{position:absolute;right:56px;top:50%;transform:translateY(-50%) translateX(6px);opacity:0;
  pointer-events:none;white-space:nowrap;font-size:13px;padding:7px 13px;border-radius:9px;
  background:rgba(28,28,31,.94);color:#f5f5f7;border:1px solid rgba(255,255,255,.14);transition:opacity .2s,transform .2s}
.dock a:hover .tip{opacity:1;transform:translateY(-50%) translateX(0)}
.dock .up{opacity:0;visibility:hidden;transition:opacity .3s,visibility .3s,background .22s,transform .22s}
.dock .up.show{opacity:1;visibility:visible}

/* ---------- 17. 进场动效 ---------- */
.js [data-rv]{opacity:0;transform:translateY(20px);
  transition:opacity .85s cubic-bezier(.22,.7,.25,1),transform .85s cubic-bezier(.22,.7,.25,1)}
.js [data-rv].in{opacity:1;transform:none}

/* 标题：加一点散焦→聚焦，比单纯位移高级 */
.js [data-rv-blur]{opacity:0;transform:translateY(26px) scale(.985);filter:blur(10px);
  transition:opacity 1s cubic-bezier(.22,.7,.25,1),transform 1s cubic-bezier(.22,.7,.25,1),filter 1s cubic-bezier(.22,.7,.25,1)}
.js [data-rv-blur].in{opacity:1;transform:none;filter:none}

/* 首屏随滚动轻微上移淡出 */
.hero-shift{will-change:transform,opacity}

/* 截图揭示：先压暗微缩，进场时展开 */
.js .shot img{opacity:0;transform:scale(1.035);transition:opacity 1s ease,transform 1.1s cubic-bezier(.22,.7,.25,1)}
.js .shot img.seen{opacity:1;transform:none}
.js .thumb{opacity:0;transition:opacity .8s ease}
.js .thumb.seen{opacity:1}

/* 头部随滚动方向收起 */
.head{transition:border-color .3s,transform .38s cubic-bezier(.3,.7,.3,1)}
.head.hide{transform:translateY(-100%)}

/* ---------- 18. 响应式 ---------- */
@media (max-width:1000px){
  .burger{display:inline-flex}
  .head .btn{display:none}
  .nav{position:fixed;inset:56px 0 auto;flex-direction:column;align-items:stretch;gap:0;
    background:rgba(0,0,0,.96);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);
    border-bottom:1px solid rgba(255,255,255,.09);padding:8px 22px 20px;margin:0;
    transform:translateY(-10px);opacity:0;visibility:hidden;transition:.28s;
    max-height:calc(100dvh - 56px);overflow:auto}
  .nav.open{transform:none;opacity:1;visibility:visible}
  .nav a:not(.btn){padding:15px 2px;font-size:17px;border-bottom:1px solid rgba(255,255,255,.07)}
  .nav .btn{display:inline-flex;margin:18px 0 0;width:100%}
}
@media (max-width:900px){
  .g3,.g4,.plans,.steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cases{grid-template-columns:minmax(0,1fr)}
  .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:680px){
  body{font-size:16px}
  .wrap,.wrap-w{width:min(100% - 36px,var(--wrap))}
  .g2,.g3,.g4,.plans,.steps,.contact-cards{grid-template-columns:minmax(0,1fr)}
  .figures{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px 20px}
  .foot-grid{grid-template-columns:minmax(0,1fr);gap:26px}
  .dock{right:14px;bottom:14px}
  .dock a .tip{display:none}
  /* 手机没有悬停：二维码改成点一下展开，位置也换到卡片下方免得顶出屏幕 */
  .qrpop{bottom:auto;top:calc(100% + 12px);transform:translateY(-8px) scale(.96);transform-origin:top center}
  .qrpop::after{top:auto;bottom:100%;translate:-50% 1px;border-top-color:transparent;border-bottom-color:#1c1c1f}
  .qrpop img{width:170px}
  html{scroll-padding-top:68px}
  .faq summary{font-size:17px;padding-block:20px}
}
@media (max-width:380px){
  .figures{grid-template-columns:minmax(0,1fr)}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important;scroll-behavior:auto!important}
  .js [data-rv],.js [data-rv-blur]{opacity:1;transform:none;filter:none}
  .js .shot img,.js .thumb{opacity:1;transform:none}
  .grain,.glow{display:none}
  .head.hide{transform:none}
}

@media print{
  .dock,.head{display:none!important}
  body{background:#fff;color:#000}
  .sec{background:#fff;color:#000}
}