/* 51漫画 · 51comic2027.cn
   深紫夜读。暗底、大圆角、胶囊按钮。首屏居中，海报往下摆。 */

:root{
  --bg:#120C1F;
  --card:#1C1330;
  --card2:#241839;
  --ink:#F2EEFA;
  --body:#B8ADD0;
  --dim:#7E7299;
  --brand:#7B5CFF;
  --brand-l:#9B82FF;
  --gold:#FFC800;
  --line:rgba(255,255,255,.09);
  --w:1140px;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.75 "PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%}
a{color:inherit}
h1,h2,h3,p,ul,ol{margin:0}
ul,ol{list-style:none;padding:0}

.wrap{max-width:var(--w);margin:0 auto;padding:0 32px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;z-index:99;background:#fff;color:#000;padding:8px 14px;border-radius:8px}

/* ---------- 顶栏 ---------- */
.top{
  position:sticky;top:0;z-index:50;
  background:rgba(18,12,31,.88);
  border-bottom:1px solid var(--line);
  backdrop-filter:saturate(1.2) blur(12px);
}
.top.on{background:rgba(18,12,31,.96);box-shadow:0 10px 30px -24px #000}
.top-in{display:flex;align-items:center;gap:28px;height:70px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:inherit}
.brand img{width:38px;height:38px;border-radius:10px;display:block}
.brand b{font-size:17px;font-weight:800;letter-spacing:-.01em}
.top nav{display:flex;gap:26px}
.top nav a{font-size:14px;color:var(--body);text-decoration:none;transition:color .18s}
.top nav a:hover{color:var(--ink)}
.top-cta{
  margin-left:auto;height:40px;padding:0 22px;border-radius:999px;
  background:linear-gradient(135deg,var(--brand),#9B5CFF);color:#fff;
  font-size:13.5px;font-weight:700;text-decoration:none;
  transition:transform .16s,box-shadow .18s;
  box-shadow:0 10px 24px -14px rgba(123,92,255,.9);
}
.top-cta:not([hidden]){display:inline-flex;align-items:center;justify-content:center}
.top-cta:hover{transform:translateY(-1px);box-shadow:0 14px 30px -14px rgba(123,92,255,1)}

/* ---------- 首屏：居中 ---------- */
.hero{padding:54px 0 18px;position:relative;overflow:hidden}
.hero::before{
  content:"";position:absolute;left:50%;top:-160px;transform:translateX(-50%);
  width:760px;height:520px;pointer-events:none;
  background:radial-gradient(50% 50% at 50% 50%,rgba(123,92,255,.22) 0%,rgba(123,92,255,0) 72%);
}
.hero .wrap{position:relative}
.hero-t{max-width:720px;margin:0 auto;text-align:center}
.kick{margin:0;font-size:12px;font-weight:800;letter-spacing:.18em;color:var(--brand-l);text-transform:uppercase}
.hero h1{font-size:clamp(32px,3.5vw,43px);line-height:1.26;font-weight:800;letter-spacing:-.02em;margin-top:16px}
.lead{margin-top:16px;font-size:15px;color:var(--body);line-height:1.85}
.acts{margin-top:26px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn{
  height:52px;padding:0 32px;border-radius:999px;
  font-size:15px;font-weight:700;text-decoration:none;
  border:1px solid transparent;
  transition:transform .16s,box-shadow .18s,border-color .18s,background .18s;
}
.btn:not([hidden]){display:inline-flex;align-items:center;justify-content:center}
.btn-p{background:linear-gradient(135deg,var(--brand),#9B5CFF);color:#fff;box-shadow:0 16px 34px -18px rgba(123,92,255,1)}
.btn-p:hover{transform:translateY(-1px);box-shadow:0 20px 40px -18px rgba(123,92,255,1)}
.btn-s{background:rgba(255,255,255,.04);color:var(--ink);border-color:rgba(255,255,255,.22)}
.btn-s:hover{background:rgba(255,255,255,.09);border-color:rgba(255,255,255,.34)}

/* ---------- 展示位：一个框，三张滑动 ---------- */
.stage{margin-top:26px;text-align:center}
.viewer{width:230px;margin:0 auto;position:relative}
.frame{
  background:#0B0714;border-radius:30px;padding:8px;
  border:1px solid rgba(255,255,255,.12);
  box-shadow:0 40px 80px -48px rgba(123,92,255,.7),0 18px 36px -28px #000;
}
.track{
  display:flex;overflow-x:auto;overscroll-behavior-x:contain;
  scroll-snap-type:x mandatory;scrollbar-width:none;
  border-radius:23px;
}
.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:23px;pointer-events:none}

.nav{
  position:absolute;top:50%;transform:translateY(-50%);z-index:2;
  width:32px;height:32px;border-radius:50%;padding:0;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.26);
  color:#fff;font-size:15px;line-height:1;cursor:pointer;
  backdrop-filter:blur(6px);
}
.nav:not([hidden]){display:flex;align-items:center;justify-content:center}
.nav.prev{left:-38px}
.nav.next{right:-38px}
.nav[disabled]{opacity:.25;cursor:default}

.bar{margin-top:14px}
.dots{display:flex;justify-content:center;gap:8px}
.dots button{
  width:7px;height:7px;padding:0;border:0;border-radius:50%;
  background:rgba(255,255,255,.24);cursor:pointer;transition:background .2s,width .2s;
}
.dots button[aria-current="true"]{width:20px;border-radius:4px;background:var(--brand-l)}
.now{margin-top:8px;font-size:12.5px;color:var(--dim)}
.now b{color:var(--ink);font-weight:700}

/* ---------- 区块通用 ---------- */
.sec{padding:88px 0}
.sec-tint{background:#160F26}
.sec-h{max-width:36em;margin:0 auto 46px;text-align:center}
.sec-h h2{margin-top:14px;font-size:clamp(26px,2.7vw,36px);line-height:1.3;font-weight:800;letter-spacing:-.01em}
.sub{margin-top:14px;font-size:15px;color:var(--body);line-height:1.85}

/* ---------- 功能：两列横排卡 ---------- */
.feat{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.feat li{
  display:grid;grid-template-columns:48px minmax(0,1fr);gap:0 18px;
  background:var(--card);border:1px solid var(--line);border-radius:22px;
  padding:26px 26px 24px;
  transition:border-color .2s,background .2s;
}
.feat li:hover{border-color:rgba(123,92,255,.45);background:var(--card2)}
.ico{
  display:flex;align-items:center;justify-content:center;
  width:48px;height:48px;border-radius:15px;
  background:rgba(123,92,255,.16);border:1px solid rgba(123,92,255,.3);
}
.ico svg{width:21px;height:21px;fill:none;stroke:var(--brand-l);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.feat b{display:block;font-size:16px;font-weight:800}
.feat p{margin-top:8px;font-size:14px;color:var(--body);line-height:1.78}

/* ---------- 分类 ---------- */
.tags{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;max-width:720px;margin:0 auto}
.tags li{
  text-align:center;font-size:14px;font-weight:600;
  background:var(--card);border:1px solid var(--line);border-radius:999px;
  padding:10px 0;color:var(--body);
}
.tags li.on{background:rgba(123,92,255,.18);border-color:rgba(123,92,255,.55);color:#fff}
.cats-note{
  max-width:640px;margin:28px auto 0;text-align:center;
  font-size:13.5px;color:var(--dim);line-height:1.85;
}

/* ---------- 下载：一张大卡 ---------- */
.dl{padding:20px 0 88px}
.dl-card{
  background:linear-gradient(160deg,#241839 0%,#1B1230 52%,#2A1B46 100%);
  border:1px solid rgba(123,92,255,.28);border-radius:30px;
  padding:52px 52px 46px;
  box-shadow:0 40px 80px -64px rgba(123,92,255,.55);
}
.dl-h{text-align:center;max-width:620px;margin:0 auto}
.dl-h h2{margin-top:12px;font-size:clamp(26px,2.8vw,34px);font-weight:800}
.dl-p{margin-top:12px;font-size:15px;color:var(--body)}
.chcs{margin-top:34px;display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.chc{
  background:rgba(12,7,22,.55);border:1px solid rgba(255,255,255,.1);
  border-radius:18px;padding:20px;text-decoration:none;color:inherit;
  transition:background .18s,border-color .18s,transform .16s;
}
.chc:not([hidden]){display:grid;grid-template-columns:40px minmax(0,1fr) 14px;gap:0 12px;align-items:center}
.chc-i{
  display:flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:12px;background:rgba(123,92,255,.2);
}
.chc-a{font-size:14px;color:#B0A5CC;text-align:right;transition:color .18s,transform .18s}
.chc:hover .chc-a{color:var(--brand-l);transform:translateX(2px)}
.chc-i svg{width:18px;height:18px;fill:none;stroke:var(--brand-l);stroke-width:1.8;stroke-linejoin:round;stroke-linecap:round}
.chc b{display:block;font-size:15.5px;font-weight:700;color:#fff}
.chc i{display:block;margin-top:4px;font-size:12.5px;font-style:normal;color:#9E92BC;line-height:1.62}
.chc:hover{background:rgba(123,92,255,.16);border-color:rgba(123,92,255,.5);transform:translateY(-1px)}
.dl-note{margin-top:22px;text-align:center;font-size:12.5px;color:var(--dim)}
.dl:not(:has(.chc:not([hidden]))){display:none}
.no-dl .top-cta{display:none}

/* ---------- 三步：竖排 ---------- */
.steps{max-width:860px;margin:0 auto}
.steps li{
  display:grid;grid-template-columns:96px minmax(0,1fr);gap:0 28px;
  align-items:baseline;padding:26px 0;border-top:1px solid var(--line);
}
.steps li:last-child{border-bottom:1px solid var(--line)}
.steps span{
  font-size:26px;font-weight:800;letter-spacing:-.02em;
  color:transparent;-webkit-text-stroke:1px rgba(155,130,255,.7);
}
.steps b{display:block;font-size:16.5px;font-weight:800}
.steps p{margin-top:7px;font-size:14px;color:var(--body);line-height:1.78;max-width:44em}

/* ---------- 问答：单栏居中 ---------- */
.faq-in{max-width:820px;margin:0 auto}
.faq-l{text-align:center;margin-bottom:34px}
.faq-l h2{margin-top:14px;font-size:clamp(24px,2.4vw,32px);font-weight:800;line-height:1.3}
details{border-top:1px solid var(--line);padding:20px 0}
details:last-child{border-bottom:1px solid var(--line)}
summary{
  display:flex;justify-content:space-between;align-items:center;gap:16px;
  font-size:15.5px;font-weight:700;cursor:pointer;list-style:none;
}
summary::-webkit-details-marker{display:none}
summary::after{
  content:"";width:9px;height:9px;flex:0 0 auto;
  border-right:1.6px solid var(--dim);border-bottom:1.6px solid var(--dim);
  transform:rotate(45deg);transition:transform .2s;margin-right:4px;
}
details[open] summary::after{transform:rotate(-135deg)}
details p{margin-top:12px;font-size:14px;color:var(--body);line-height:1.85}

/* ---------- 页脚 ---------- */
.foot{background:#0C0716;border-top:1px solid var(--line);padding:60px 0 26px}
.foot-in{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:36px}
.foot-b p{margin-top:14px;max-width:26em;font-size:13.5px;line-height:1.8;color:var(--dim)}
.foot-c b{display:block;margin-bottom:12px;color:#fff;font-size:13px;letter-spacing:.05em}
.foot-c a{display:block;margin-top:9px;font-size:13.5px;color:var(--dim);text-decoration:none;transition:color .18s}
.foot-c a:hover{color:var(--brand-l)}
.foot-bt{
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  font-size:12.5px;color:#5C5375;
}

/* ---------- 404 ---------- */
.nf-page .top-cta{margin-left:auto}
.nf{padding:96px 0 104px;min-height:56vh;display:flex;align-items:center}
.nf-in{width:100%;max-width:640px;margin:0 auto;text-align:center}
.nf h1{margin-top:14px;font-size:clamp(30px,3.6vw,42px);line-height:1.26;font-weight:800}
.nf .lead{margin:18px auto 0;max-width:30em}
.nf-acts{margin-top:30px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ---------- 窄屏 ---------- */
@media (max-width:960px){
  .wrap{padding:0 22px}
  .top nav{display:none}
  .top-in{height:64px}
  .hero{padding:44px 0 52px}
  /* 窄屏列窄，硬换行会把词拆开，改回自然断行 */
  .lead br,.feat p br,.sub br,.cats-note br{display:none}
  .stage{margin-top:36px}
  .viewer{width:260px}
  .nav:not([hidden]){display:none}
  .sec{padding:64px 0}
  .feat{grid-template-columns:1fr;gap:12px}
  .feat li{padding:22px 20px}
  .dl{padding:8px 0 64px}
  .dl-card{padding:36px 24px 32px;border-radius:24px}
  .chcs{grid-template-columns:1fr;margin-top:26px}
  .steps li{grid-template-columns:64px minmax(0,1fr);gap:0 18px;padding:22px 0}
  .steps span{font-size:22px}
  .foot-in{grid-template-columns:1fr 1fr;gap:28px}
  .foot-b{grid-column:1 / -1}
}

@media (max-width:560px){
  .hero h1{font-size:clamp(30px,8vw,38px)}
  .acts .btn{flex:1 1 130px;padding:0 18px}
  .viewer{width:244px}
  .tags{grid-template-columns:repeat(4,1fr)}
  .foot-bt{flex-direction:column;gap:8px}
}