/* 抖漫漫画 · 站4 杂志专刊
   象牙 #FCFBF7 / 墨 #23241E / 墨绿 #1E5240 / 橙点缀 #C97A2B
   宋体标题 + 无衬线正文，2px 圆角，双栏首屏 + 页边目录栏。 */

:root{
  --bg:#FCFBF7;
  --ink:#23241E;
  --dim:#77756A;
  --line:#E3E0D5;
  --green:#1E5240;
  --green-soft:#E8F0EB;
  --accent:#C97A2B;
  --card:#FFFFFF;
}
*{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:1.85;
}
img{max-width:100%}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
.wrap{max-width:1100px;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}

h1,h2,h3,.issue,.pull{
  font-family:"Noto Serif SC","Songti SC","SimSun",serif;
}
.kick{
  font-size:11px;letter-spacing:.26em;font-weight:700;color:var(--accent);
  text-transform:uppercase;font-family:ui-monospace,Consolas,monospace;
}

/* ---------- 顶栏 ---------- */
.top{position:sticky;top:0;z-index:50;background:rgba(252,251,247,.94);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.top-in{display:flex;align-items:center;gap:30px;height:64px}
.brand{display:flex;align-items:center;gap:10px}
.brand img{width:32px;height:32px;border-radius:7px}
.brand b{font-family:"Noto Serif SC","Songti SC","SimSun",serif;font-size:18px;font-weight:700}
.nav{display:flex;gap:22px;margin-left:auto}
.nav a{font-size:13.5px;color:var(--dim)}
.nav a:hover{color:var(--ink)}
.top-cta{background:var(--green);color:#fff;font-size:13.5px;font-weight:600;padding:9px 20px;border-radius:3px}
.top-cta:hover{background:var(--ink)}

/* ---------- 首屏：双栏杂志 ---------- */
.hero{border-bottom:1px solid var(--line)}
.hero-in{
  display:grid;grid-template-columns:210px minmax(0,1fr);gap:70px;
  padding:80px 0 76px;
}
.margin-col{border-right:1px solid var(--line);padding-right:34px}
.issue{font-size:15px;line-height:1.7;color:var(--green);border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:16px}
.toc{margin-bottom:28px}
.toc li{border-bottom:1px dotted var(--line)}
.toc a{display:block;font-size:14px;padding:9px 0;color:var(--dim)}
.toc a:hover{color:var(--green)}
.margin-note{margin-top:14px;font-size:12.5px;color:var(--dim)}
h1{
  font-size:clamp(34px,4vw,52px);line-height:1.28;font-weight:700;
  letter-spacing:.01em;margin:14px 0 22px;
}
.lead{max-width:560px;font-size:15.5px;color:#3E3D35}
.hero-foot{margin-top:26px;padding-top:18px;border-top:1px solid var(--line);font-size:13px;color:var(--dim);max-width:560px}

/* 404 主体 */
.nf-in{padding:80px 0 70px}

/* ---------- 区块通用 ---------- */
.sec{padding:104px 0}
.sec-h{margin-bottom:44px}
.sec-h h2{font-size:clamp(26px,2.8vw,36px);font-weight:700;letter-spacing:.01em;margin-top:10px}
.sec-p{max-width:560px;margin-top:12px;font-size:14px;color:var(--dim)}

/* ---------- 四个小节：两栏正文 ---------- */
.story{border-bottom:1px solid var(--line)}
.story-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px 60px}
.story-grid h3{font-size:20px;font-weight:700;margin-bottom:10px}
.story-grid h3 span{color:var(--accent);margin-right:10px;font-size:17px}
.story-grid p{font-size:14.5px;color:#4A4940}
.pull{
  margin-top:56px;padding:26px 34px;background:var(--green-soft);
  border-left:3px solid var(--green);font-size:19px;line-height:1.7;color:var(--green);
}

/* ---------- 图版：剪报式 ---------- */
.shots{border-bottom:1px solid var(--line);background:#F5F2E9}
.shots-in{
  display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:70px;align-items:center;
  padding:104px 0;
}
.shots-t h2{font-size:clamp(25px,2.7vw,34px);font-weight:700;margin:10px 0 14px}
.shots-t .sub{color:#57554A;font-size:14.5px;max-width:460px}

.stage{width:300px}
.viewer{position:relative}
.frame{
  background:#fff;padding:10px 10px 14px;border:1px solid #DDD9C9;
  box-shadow:0 10px 26px rgba(35,36,30,.14);
  transform:rotate(-1.1deg);
}
.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:16px}
.dots{display:flex;justify-content:center;gap:8px}
.dots button{
  width:7px;height:7px;padding:0;border:0;border-radius:50%;
  background:#C9C5B4;cursor:pointer;transition:background .15s,width .15s;
}
.dots button[aria-current="true"]{width:22px;border-radius:4px;background:var(--green)}
.now{margin-top:9px;text-align:center;font-size:12.5px;color:var(--dim);font-family:ui-monospace,monospace}
.now b{color:var(--ink)}

/* ---------- 下载区：档案卡 ---------- */
.dl{padding:104px 0;border-bottom:1px solid var(--line)}
.dl-card{
  background:var(--card);border:1px solid var(--line);border-top:3px solid var(--green);
  border-radius:2px;padding:50px 50px 44px;box-shadow:0 8px 30px rgba(35,36,30,.07);
}
.dl-head h2{font-size:clamp(25px,2.7vw,34px);font-weight:700;margin:10px 0 12px}
.dl-p{font-size:14.5px;color:var(--dim)}
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:30px}
.store{
  display:grid;grid-template-columns:44px minmax(0,1fr) auto;gap:0 13px;align-items:center;
  background:var(--bg);border:1px solid var(--line);border-radius:3px;padding:15px 17px;
  transition:border-color .12s,transform .12s;
}
.store:hover{border-color:var(--green);transform:translateY(-2px)}
.st-ico{
  width:44px;height:44px;border-radius:3px;background:var(--green-soft);color:var(--green);
  font-weight:800;font-size:19px;display:flex;align-items:center;justify-content:center;
}
.st-t b{display:block;font-size:15px;font-weight:700}
.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(--green);padding:8px 16px;border-radius:3px}
.dl-list{
  margin-top:26px;padding-top:22px;border-top:1px solid var(--line);
  display:grid;grid-template-columns:repeat(2,1fr);gap:8px 30px;
}
.dl-list li{font-size:13px;color:var(--dim);padding-left:18px;position:relative}
.dl-list li::before{content:"—";position:absolute;left:0;color:var(--accent)}

/* ---------- 安装步骤：编号长条 ---------- */
.steps{padding:104px 0;border-bottom:1px solid var(--line)}
.step-line{max-width:820px}
.step-line li{
  display:grid;grid-template-columns:64px minmax(0,1fr);gap:0 30px;
  padding:22px 0;border-top:1px solid var(--line);
}
.step-line li:last-child{border-bottom:1px solid var(--line)}
.step-line span{font-family:ui-monospace,Consolas,monospace;font-size:14px;color:var(--accent)}
.step-line h3{font-size:17px;font-weight:700}
.step-line p{font-size:14px;color:var(--dim)}

/* ---------- 问答 ---------- */
.faq{padding:104px 0;border-bottom:1px solid var(--line);background:#F5F2E9}
.qa{max-width:820px}
.qa details{background:var(--card);border:1px solid var(--line);border-radius:2px;padding:17px 22px;margin-bottom:10px}
.qa summary{cursor:pointer;font-weight:700;font-size:15px;list-style:none;display:flex;justify-content:space-between;align-items:center}
.qa summary::after{content:"+";color:var(--accent);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)}

.btn{display:inline-block;font-size:14.5px;font-weight:600;padding:12px 28px;border-radius:3px}
.btn-p{background:var(--green);color:#fff}
.btn-p:hover{background:var(--ink)}
.btn-s{border:1px solid var(--ink)}
.btn-s:hover{background:var(--ink);color:#fff}

/* ---------- 页脚 ---------- */
.foot{background:var(--green);color:#C9D8CF;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:#8FAF9E;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,.16);margin-top:38px;padding-top:18px;font-size:12px;color:#8FAF9E}

/* 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:920px){
  .hero-in{grid-template-columns:1fr;gap:44px}
  .margin-col{border-right:0;border-bottom:1px solid var(--line);padding:0 0 30px}
  .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:66px 0}
  .shots-in{padding:66px 0}
  .dl{padding:66px 0}
  .steps{padding:66px 0}
  .faq{padding:66px 0}
  .hero-in{padding:50px 0 54px}
  .story-grid{grid-template-columns:1fr;gap:30px}
  .pull{padding:20px 22px;font-size:17px}
  .dl-card{padding:32px 24px 28px}
  .dl-grid{grid-template-columns:1fr}
  .dl-list{grid-template-columns:1fr}
  .step-line li{grid-template-columns:44px 1fr;gap:2px 16px}
  .stage{width:240px}
  .viewer{width:240px}
  .foot-in{grid-template-columns:1fr 1fr;gap:26px}
}