/* 抖漫漫画 · 站3 冷灰栅格
   冷灰 #EFEFEA / 白面板 / 墨 #111214 / 品牌橙 #FB5200
   0 圆角，可见栅格线，等宽数字，题材用表格承载。 */

:root{
  --bg:#EFEFEA;
  --card:#FFFFFF;
  --ink:#111214;
  --dim:#6E6E66;
  --line:#CFCFC6;
  --grid:#DDDDD4;
  --brand:#FB5200;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:15px;line-height:1.7;
}
img{max-width:100%}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
.wrap{max-width:1160px;margin:0 auto;padding:0 28px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;background:#fff;padding:8px 14px;z-index:99}

.kick{
  font-size:11px;letter-spacing:.24em;font-weight:700;color:var(--brand);
  text-transform:uppercase;font-family:ui-monospace,Consolas,monospace;
}
.kick-l{color:#FF9355}

/* ---------- 顶栏 ---------- */
.top{position:sticky;top:0;z-index:50;background:var(--bg);border-bottom:2px solid var(--ink)}
.top-in{display:flex;align-items:center;gap:30px;height:62px}
.brand{display:flex;align-items:center;gap:10px}
.brand img{width:32px;height:32px;border-radius:0}
.brand b{font-size:17px;font-weight:800;letter-spacing:-.01em}
.nav{display:flex;gap:24px;margin-left:auto}
.nav a{font-size:13.5px;color:var(--dim)}
.nav a:hover{color:var(--ink)}
.top-cta{background:var(--ink);color:#fff;font-size:13.5px;font-weight:700;padding:9px 18px}
.top-cta:hover{background:var(--brand)}

/* ---------- 首屏：栅格巨字 + 侧列 ---------- */
.hero{border-bottom:2px solid var(--ink)}
.hero-grid{
  display:grid;grid-template-columns:minmax(0,1fr) 130px;gap:60px;
  padding:88px 0 72px;
}
.hero-grid{position:relative}
h1{
  font-size:clamp(38px,4.6vw,60px);line-height:1.12;font-weight:800;
  letter-spacing:-.025em;margin:14px 0 20px;
}
.lead{max-width:560px;color:#3A3A34;font-size:15.5px}
.acts{display:flex;gap:12px;margin-top:28px}
.btn{
  display:inline-block;font-size:15px;font-weight:700;padding:13px 30px;
  border:1px solid var(--ink);transition:background .12s,color .12s;
}
.btn-p{background:var(--brand);border-color:var(--brand);color:#fff}
.btn-p:hover{background:var(--ink);border-color:var(--ink)}
.btn-s{background:transparent}
.btn-s:hover{background:var(--ink);color:#fff}
.note{margin-top:16px;font-size:13px;color:var(--dim)}
.hero-side{
  border-left:1px solid var(--ink);padding-left:18px;align-self:stretch;
  display:flex;flex-direction:column;justify-content:flex-end;gap:6px;
}
.hero-side p{
  font-family:ui-monospace,Consolas,monospace;font-size:12px;color:var(--dim);
  letter-spacing:.08em;
}

/* 404 主体 */
.nf-in{padding:88px 0 72px}

/* ---------- 区块通用 ---------- */
.sec{padding:120px 0}
.sec-h{margin-bottom:46px}
.sec-h h2{font-size:clamp(27px,2.9vw,38px);font-weight:800;letter-spacing:-.02em;margin-top:10px}
.sec-p{max-width:560px;margin-top:12px;font-size:14px;color:var(--dim)}

/* ---------- 功能卡：白底直角 ---------- */
.feat{padding:104px 0;border-bottom:2px solid var(--ink);background:var(--bg)}
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:2px solid var(--ink)}
.feat-grid li{background:var(--card);padding:24px 26px 22px;border:1px solid var(--grid);margin:-1px 0 0 -1px}
.feat-grid .no{font-family:ui-monospace,Consolas,monospace;font-size:13px;color:var(--brand);font-weight:700}
.feat-grid h3{font-size:17.5px;font-weight:800;margin:10px 0 8px}
.feat-grid p{font-size:13.8px;color:var(--dim)}

/* ---------- 界面展示 ---------- */
.shots{border-bottom:2px solid var(--ink);background:var(--card)}
.shots-in{
  display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:70px;align-items:center;
  padding:118px 0;
}
.shots-t h2{font-size:clamp(26px,2.8vw,36px);font-weight:800;letter-spacing:-.02em;margin:10px 0 14px}
.shots-t .sub{color:#4A4A44;font-size:14.5px;max-width:480px}

.stage{width:320px}
.viewer{position:relative}
.frame{background:var(--ink);padding:9px;border:2px solid var(--ink)}
.track{
  display:flex;overflow-x:auto;overscroll-behavior-x:contain;
  scroll-snap-type:x mandatory;scrollbar-width:none;
}
.track::-webkit-scrollbar{display:none}
.slide{flex:0 0 100%;margin:0;scroll-snap-align:center}
.slide img{display:block;width:100%;height:auto;pointer-events:none}
.snav{
  position:absolute;top:50%;transform:translateY(-50%);z-index:2;
  width:34px;height:34px;padding:0;cursor:pointer;
  background:#fff;border:1px solid var(--ink);
  font-size:16px;line-height:1;color:var(--ink);
  display:none;align-items:center;justify-content:center;
}
.snav:not([hidden]){display:flex}
.snav.prev{left:-46px}
.snav.next{right:-46px}
.snav[disabled]{opacity:.25;cursor:default}
.bar{margin-top:14px;display:flex;justify-content:space-between;align-items:center}
.dots{display:flex;gap:7px}
.dots button{
  width:8px;height:8px;padding:0;border:1px solid var(--ink);
  background:#fff;cursor:pointer;transition:background .15s;
}
.dots button[aria-current="true"]{background:var(--brand);border-color:var(--brand)}
.now{font-size:12.5px;color:var(--dim);font-family:ui-monospace,monospace}
.now b{color:var(--ink)}

/* ---------- 分区表 ---------- */
.tbl{padding:104px 0;border-bottom:2px solid var(--ink)}
.cat{width:100%;border-collapse:collapse;background:var(--card)}
.cat th,.cat td{border:1px solid var(--grid);padding:17px 20px;text-align:left;font-size:14px}
.cat thead th{
  background:var(--ink);color:#fff;font-size:12.5px;letter-spacing:.12em;
  font-weight:700;font-family:ui-monospace,Consolas,monospace;
}
.cat td b{font-size:15px;font-weight:800}
.cat td:nth-child(2){width:220px;color:var(--dim);font-size:13.5px}
.cat td:nth-child(3){color:#3A3A34}
.tbl-note{margin-top:16px;font-size:13px;color:var(--dim)}

/* ---------- 下载区：黑底整宽带 ---------- */
.dl{background:var(--ink);color:#EDEBE4;padding:118px 0}
.dl-in{max-width:880px}
.dl-head h2{font-size:clamp(26px,2.8vw,36px);font-weight:800;letter-spacing:-.02em;margin:10px 0 12px}
.dl-p{font-size:14.5px;color:#A6A49C}
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:30px}
.store{
  display:grid;grid-template-columns:44px minmax(0,1fr) auto;gap:0 13px;align-items:center;
  background:#fff;color:var(--ink);padding:15px 17px;border:1px solid #fff;
  transition:background .12s;
}
.store:hover{background:var(--brand-soft, #FFE3D1)}
.st-ico{
  width:44px;height:44px;background:var(--brand);color:#fff;
  font-weight:900;font-size:19px;display:flex;align-items:center;justify-content:center;
}
.st-t b{display:block;font-size:15px;font-weight:800}
.st-t i{display:block;font-style:normal;font-size:12px;color:var(--dim);margin-top:2px}
.st-go{font-size:12.5px;font-weight:700;color:#fff;background:var(--brand);padding:8px 15px}
.dl-list{
  margin-top:26px;padding-top:22px;border-top:1px solid rgba(255,255,255,.18);
  display:grid;grid-template-columns:repeat(2,1fr);gap:8px 30px;
}
.dl-list li{font-size:13px;color:#A6A49C;padding-left:18px;position:relative}
.dl-list li::before{content:"—";position:absolute;left:0;color:var(--brand)}

/* ---------- 安装步骤：三列横排 ---------- */
.steps{padding:104px 0;border-bottom:2px solid var(--ink)}
.step-row{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;border-top:1px solid var(--ink)}
.step-row li{padding:32px 0 6px;border-top:3px solid transparent}
.step-row span{
  font-family:ui-monospace,Consolas,monospace;font-size:26px;font-weight:700;
  color:var(--brand);display:block;line-height:1;
}
.step-row h3{font-size:17.5px;font-weight:800;margin:14px 0 8px}
.step-row p{font-size:14px;color:var(--dim)}

/* ---------- 问答 ---------- */
.faq{padding:104px 0;border-bottom:2px solid var(--ink)}
.qa{display:grid;grid-template-columns:repeat(2,1fr);gap:12px 24px}
.qa details{background:var(--card);border:1px solid var(--grid);padding:20px 23px}
.qa summary{cursor:pointer;font-weight:700;font-size:15px;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
.qa summary::after{content:"+";color:var(--brand);font-size:18px;font-weight:400}
.qa details[open] summary::after{content:"−"}
.qa details p{margin-top:10px;font-size:13.8px;color:var(--dim)}

/* ---------- 页脚 ---------- */
.foot{background:var(--ink);color:#B9B7AE;padding:60px 0 24px}
.foot-in{display:grid;grid-template-columns:repeat(3,1fr) 1.6fr;gap:30px}
.f-h{font-size:12px;letter-spacing:.2em;color:#807E76;margin-bottom:14px;font-family:ui-monospace,monospace}
.foot a{display:block;font-size:13.5px;padding:4px 0}
.foot a:hover{color:#fff}
.f-about p{font-size:13px;line-height:1.75}
.f-line{border-top:1px solid rgba(255,255,255,.14);margin-top:38px;padding-top:18px;font-size:12px;color:#807E76}

/* 三个入口全被隐藏时，整块下载区一起收起 */
.dl:not(:has(.store:not([hidden]))){display:none}
.no-dl .top-cta{display:none}

/* ---------- 窄屏 ---------- */
@media (max-width:960px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-side{flex-direction:row;flex-wrap:wrap;gap:4px 18px;border-left:0;border-top:1px solid var(--ink);padding:18px 0 0;justify-content:flex-start}
  .shots-in{grid-template-columns:1fr;gap:44px;justify-items:center;text-align:center}
  .shots-t .sub{max-width:none}
}
@media (max-width:640px){
  /* 窄屏列窄，硬换行会把词拆开，改回自然断行 */
  .lead br,.dl-p br{display:none}
  .nav:not([hidden]){display:none}
  .sec{padding:64px 0}
  .shots-in{padding:64px 0}
  .dl{padding:64px 0}
  .steps{padding:64px 0}
  .faq{padding:64px 0}
  .hero-grid{padding:48px 0 48px}
  .feat-grid{grid-template-columns:1fr}
  .cat th,.cat td{padding:11px 12px;font-size:13px}
  .cat td:nth-child(2){width:auto}
  .dl-grid{grid-template-columns:1fr}
  .dl-list{grid-template-columns:1fr}
  .step-row{grid-template-columns:1fr;gap:24px}
  .qa{grid-template-columns:1fr}
  .foot-in{grid-template-columns:1fr 1fr;gap:26px}
  .stage{width:240px}
  .viewer{width:240px}
}