/* 抖漫漫画 · 站5 藏青舞台
   深藏青 #14263E 首屏 + 米白 #FAF7F0 正文，明暗交替
   橙 #FB5200，圆角 24–32px，胶囊按钮，卡片软层次强。 */

:root{
  --navy:#14263E;
  --navy-2:#1B3050;
  --bg:#FAF7F0;
  --ink:#20242E;
  --dim:#7A7E88;
  --line:#EAE3D4;
  --brand:#FB5200;
  --brand-soft:#FFE4D4;
  --panel:#F3ECDD;
  --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:1.7;
}
img{max-width:100%}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
.wrap{max-width:1120px;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:#FFD9BF}

/* ---------- 顶栏 ---------- */
.top{
  position:sticky;top:0;z-index:50;background:var(--navy);color:#EAF0F8;
  border-bottom:1px solid rgba(255,255,255,.1);
}
.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:9px}
.brand b{font-size:17px;font-weight:800}
.nav{display:flex;gap:22px;margin-left:auto}
.nav a{font-size:13.5px;color:#9FB0C6}
.nav a:hover{color:#fff}
.top-cta{background:var(--brand);color:#fff;font-size:13.5px;font-weight:700;padding:10px 22px;border-radius:999px}
.top-cta:hover{filter:brightness(1.08)}

/* ---------- 首屏：藏青居中 ---------- */
.hero{background:var(--navy);color:#EAF0F8;text-align:center;padding:84px 0 76px}
h1{
  font-size:clamp(36px,4.4vw,58px);line-height:1.16;font-weight:800;
  letter-spacing:-.02em;margin:18px auto 20px;max-width:640px;
}
.lead{max-width:600px;margin:0 auto;color:#B9C6D8;font-size:15.5px}
.acts{display:flex;gap:14px;margin-top:32px;justify-content:center}
.btn{display:inline-block;font-size:15px;font-weight:700;padding:13px 32px;border-radius:999px;transition:transform .12s,filter .12s}
.btn-p{background:var(--brand);color:#fff}
.btn-p:hover{transform:translateY(-2px);filter:brightness(1.06)}
.btn-s{border:1px solid rgba(255,255,255,.3);color:#EAF0F8}
.btn-s:hover{border-color:#fff;transform:translateY(-2px)}
.note{margin-top:16px;font-size:13px;color:#8B9AB0}
.chips{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:34px}
.chips li{
  font-size:13px;color:#D8E2EE;background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.16);border-radius:999px;padding:7px 18px;
}

/* ---------- 区块通用 ---------- */
.sec{padding:104px 0}
.sec-h{margin-bottom:46px}
.sec-h h2{font-size:clamp(27px,2.9vw,38px);font-weight:800;letter-spacing:-.015em;margin-top:10px}
.sec-h-c{text-align:center}
.sec-h-c .sub{margin-left:auto;margin-right:auto}
.sec-p{max-width:560px;margin-top:12px;font-size:14px;color:var(--dim)}
.sub{max-width:540px;margin-top:12px;font-size:14.5px;color:var(--dim)}

/* ---------- 功能卡：淡彩图标块 ---------- */
.feat{padding:104px 0}
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feat-grid li{
  background:var(--card);border-radius:24px;padding:28px 26px 26px;
  box-shadow:0 6px 24px rgba(32,36,46,.06);
}
.ico{
  width:52px;height:52px;border-radius:16px;font-weight:800;font-size:20px;
  display:flex;align-items:center;justify-content:center;
}
.ico-o{background:var(--brand-soft);color:var(--brand)}
.ico-b{background:#E1EBFB;color:#2F5FB7}
.ico-g{background:#DFF0E4;color:#22804A}
.ico-y{background:#FBF0CE;color:#A97B0B}
.ico-p{background:#F4E4F3;color:#9A3D96}
.ico-n{background:#E7E7EE;color:#4A4E66}
.feat-grid h3{font-size:18px;font-weight:800;margin:16px 0 8px}
.feat-grid p{font-size:13.8px;color:var(--dim)}

/* ---------- 界面展示：米色圆角舞台 ---------- */
.shots{padding:0 0 104px}
.stage-wrap{
  background:var(--panel);border-radius:32px;padding:64px 40px 56px;
  display:flex;flex-direction:column;align-items:center;
}
.stage{width:300px}
.viewer{position:relative}
.frame{
  background:var(--navy);border-radius:30px;padding:9px;
  box-shadow:0 16px 40px rgba(20,38,62,.25);
}
.track{
  display:flex;overflow-x:auto;overscroll-behavior-x:contain;
  scroll-snap-type:x mandatory;scrollbar-width:none;border-radius:22px;
}
.track::-webkit-scrollbar{display:none}
.slide{flex:0 0 100%;margin:0;scroll-snap-align:center}
.slide img{display:block;width:100%;height:auto;border-radius:22px;pointer-events:none}
.snav{
  position:absolute;top:50%;transform:translateY(-50%);z-index:2;
  width:36px;height:36px;border-radius:50%;padding:0;cursor:pointer;
  background:#fff;border:1px solid var(--line);color:var(--ink);
  font-size:16px;line-height:1;
  box-shadow:0 4px 14px rgba(32,36,46,.12);
  display:none;align-items:center;justify-content:center;
}
.snav:not([hidden]){display:flex}
.snav.prev{left:-48px}
.snav.next{right:-48px}
.snav[disabled]{opacity:.25;cursor:default}
.bar{margin-top:16px}
.dots{display:flex;justify-content:center;gap:8px}
.dots button{
  width:8px;height:8px;padding:0;border:0;border-radius:50%;
  background:#D9CFBA;cursor:pointer;transition:background .15s,width .15s;
}
.dots button[aria-current="true"]{width:24px;border-radius:5px;background:var(--brand)}
.now{margin-top:10px;text-align:center;font-size:12.5px;color:var(--dim);font-family:ui-monospace,monospace}
.now b{color:var(--ink)}

/* ---------- 下载区：橙色大圆角卡 ---------- */
.dl{padding:8px 0 104px}
.dl-card{background:var(--brand);color:#fff;border-radius:32px;padding:56px 52px 48px}
.dl-head h2{font-size:clamp(26px,2.8vw,36px);font-weight:800;letter-spacing:-.015em;margin:10px 0 12px}
.dl-p{font-size:14.5px;color:#FFE0CC}
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:32px}
.store{
  display:grid;grid-template-columns:46px minmax(0,1fr) auto;gap:0 14px;align-items:center;
  background:#fff;color:var(--ink);border-radius:18px;padding:16px 18px;
  transition:transform .12s;
}
.store:hover{transform:translateY(-3px)}
.st-ico{
  width:46px;height:46px;border-radius:14px;background:var(--brand-soft);color:var(--brand);
  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(--navy);
  padding:9px 17px;border-radius:999px;
}
.dl-list{
  margin-top:28px;padding-top:24px;border-top:1px solid rgba(255,255,255,.3);
  display:grid;grid-template-columns:repeat(2,1fr);gap:8px 30px;
}
.dl-list li{font-size:13px;color:#FFE9DB;padding-left:18px;position:relative}
.dl-list li::before{content:"—";position:absolute;left:0;color:#FFD9BF}

/* ---------- 安装步骤：三张竖卡 ---------- */
.steps{padding:8px 0 104px}
.step-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.step-cards li{
  background:var(--card);border-radius:24px;padding:28px 26px 26px;
  box-shadow:0 6px 24px rgba(32,36,46,.06);
}
.st-no{
  display:inline-flex;width:44px;height:44px;border-radius:999px;
  background:var(--navy);color:#fff;font-weight:800;font-size:16px;
  align-items:center;justify-content:center;font-family:ui-monospace,monospace;
}
.step-cards h3{font-size:18px;font-weight:800;margin:16px 0 8px}
.step-cards p{font-size:13.8px;color:var(--dim)}

/* ---------- 问答 ---------- */
.faq{padding:8px 0 104px}
.qa{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 20px}
.qa details{
  background:var(--card);border-radius:18px;padding:19px 23px;
  box-shadow:0 4px 16px rgba(32,36,46,.05);
}
.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(--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(--navy);color:#9FB0C6;padding:64px 0 26px}
.foot-in{display:grid;grid-template-columns:repeat(3,1fr) 1.6fr;gap:30px}
.f-h{font-size:12px;letter-spacing:.2em;color:#5F7288;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,.12);margin-top:40px;padding-top:20px;font-size:12px;color:#5F7288}

/* 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:900px){
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .step-cards{grid-template-columns:1fr}
}
@media (max-width:640px){
  /* 窄屏列窄，硬换行会把词拆开，改回自然断行 */
  .lead br,.feat-grid p br,.dl-p br{display:none}
  .nav:not([hidden]){display:none}
  .feat{padding:70px 0}
  .shots{padding:0 0 70px}
  .dl{padding:8px 0 70px}
  .steps{padding:8px 0 70px}
  .faq{padding:8px 0 70px}
  .hero{padding:56px 0 54px}
  .stage-wrap{padding:40px 18px 36px;border-radius:24px}
  .feat-grid{grid-template-columns:1fr}
  .dl-card{padding:36px 24px 32px;border-radius:24px}
  .dl-grid{grid-template-columns:1fr}
  .dl-list{grid-template-columns:1fr}
  .qa{grid-template-columns:1fr}
  .stage{width:240px}
  .viewer{width:240px}
  .foot-in{grid-template-columns:1fr 1fr;gap:26px}
}