/* ==========================================================================
   一耽 App 内容专题站 — 共享样式表
   设计调性：清新薄荷青 + 蜜桃粉，漫画阅读类应用视觉
   ========================================================================== */

:root{
  --brand:#26B0A4;
  --brand-d:#188A82;
  --brand-l:#E8F7F4;
  --mint:#4FD1B5;
  --accent:#FF6F91;
  --accent-d:#E9547A;
  --accent-l:#FFEEF3;
  --ink:#1F2A37;
  --ink-2:#5E6E80;
  --ink-3:#9AA8B6;
  --bg:#F5FAF9;
  --card:#FFFFFF;
  --line:#E4EEEC;
  --grad:linear-gradient(135deg,#26B0A4 0%,#6EDEBE 100%);
  --grad-accent:linear-gradient(135deg,#FF6F91 0%,#FFB27A 100%);
  --shadow-s:0 2px 10px rgba(23,63,64,.06);
  --shadow-m:0 10px 30px rgba(23,63,64,.09);
  --shadow-l:0 24px 60px rgba(23,63,64,.14);
  --radius:20px;
  --radius-s:14px;
  --wrap:1140px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand-d);text-decoration:none;transition:color .2s}
a:hover{color:var(--accent-d)}
h1,h2,h3,h4{margin:0 0 .6em;line-height:1.3;font-weight:800;letter-spacing:-.01em}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.25em}
li{margin:.35em 0}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 22px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.5em;
  padding:.72em 1.5em;border-radius:999px;font-weight:700;font-size:15px;
  border:2px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .18s,box-shadow .18s,background .18s,color .18s;
}
.btn svg{width:18px;height:18px;flex:none}
.btn-primary{background:var(--grad-accent);color:#fff;box-shadow:0 8px 22px rgba(233,84,122,.32)}
.btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:0 12px 28px rgba(233,84,122,.42)}
.btn-brand{background:var(--grad);color:#fff;box-shadow:0 8px 22px rgba(38,176,164,.3)}
.btn-brand:hover{color:#fff;transform:translateY(-2px)}
.btn-ghost{background:#fff;color:var(--brand-d);border-color:var(--line);box-shadow:var(--shadow-s)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-d);transform:translateY(-2px)}
.btn-lg{padding:.9em 2em;font-size:17px}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.9);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:18px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-logo{width:44px;height:44px;border-radius:12px;box-shadow:var(--shadow-s)}
.brand-name{font-size:23px;font-weight:900;color:var(--ink);letter-spacing:.06em}
.nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav a{
  padding:.5em .95em;border-radius:999px;font-weight:600;font-size:15px;color:var(--ink-2);
}
.nav a:hover{background:var(--brand-l);color:var(--brand-d)}
.nav a.active{background:var(--brand-l);color:var(--brand-d)}
.header-cta{flex:none}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border:1px solid var(--line);
  background:#fff;border-radius:12px;cursor:pointer;padding:0;align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:20px;height:2px;background:var(--ink);border-radius:2px
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ---------- 通用区块 ---------- */
.section{padding:76px 0}
.section.tight{padding:56px 0}
.section-head{max-width:720px;margin:0 auto 42px;text-align:center}
.section-head h2{font-size:34px;margin-bottom:.3em}
.section-head p{color:var(--ink-2);margin:0}
.eyebrow{
  display:inline-block;padding:.28em .9em;border-radius:999px;background:var(--brand-l);
  color:var(--brand-d);font-size:13.5px;font-weight:800;letter-spacing:.08em;margin-bottom:14px
}
.bg-white{background:#fff}
.bg-soft{background:linear-gradient(180deg,#F5FAF9 0%,#EAF6F3 100%)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:64px 0 72px;
  background:radial-gradient(1100px 460px at 88% -8%,#D8F5EE 0%,rgba(216,245,238,0) 62%),
             radial-gradient(900px 420px at -6% 12%,#FFE9EF 0%,rgba(255,233,239,0) 60%),
             #F5FAF9}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:52px;align-items:center}
.hero h1{font-size:52px;line-height:1.16;letter-spacing:-.02em;margin-bottom:.35em}
.hero h1 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-lead{font-size:17.5px;color:var(--ink-2);max-width:33em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:26px 0 18px}
.hero-note{font-size:13.5px;color:var(--ink-3)}
.trust-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.trust-chip{
  display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);
  border-radius:999px;padding:.42em 1em;font-size:13.5px;font-weight:600;color:var(--ink-2);
  box-shadow:var(--shadow-s)
}
.trust-chip svg{width:16px;height:16px;color:var(--brand);flex:none}

.device-wrap{display:flex;justify-content:center}
.device{
  position:relative;width:min(330px,78vw);border-radius:46px;padding:11px;
  background:linear-gradient(160deg,#22303D,#0F1A22);
  box-shadow:var(--shadow-l);
}
.device::after{
  content:"";position:absolute;top:22px;left:50%;transform:translateX(-50%);
  width:96px;height:22px;border-radius:999px;background:#0F1A22;z-index:3
}
.device img{border-radius:36px;width:100%;height:auto}
.device-badge{
  position:absolute;left:-18px;bottom:64px;background:#fff;border-radius:16px;
  padding:12px 16px;box-shadow:var(--shadow-m);display:flex;align-items:center;gap:10px;z-index:4
}
.device-badge b{font-size:20px;display:block;line-height:1.2}
.device-badge small{color:var(--ink-3);font-size:12px}
.stars{color:#FFB020;font-size:14px;letter-spacing:1px}

/* ---------- 数据信任条 ---------- */
.stats{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.stat{padding:30px 18px;text-align:center;border-left:1px solid var(--line)}
.stat:first-child{border-left:0}
.stat b{display:block;font-size:34px;color:var(--brand-d);line-height:1.1;font-weight:900}
.stat b .unit{font-size:17px;margin-left:2px}
.stat span{display:block;margin-top:8px;font-size:14px;color:var(--ink-2)}

/* ---------- 卡片网格 ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow-s);transition:transform .22s,box-shadow .22s
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-m)}
.card h3{font-size:19px;margin-bottom:.35em}
.card p{margin:0;color:var(--ink-2);font-size:15px}
.card .ico{
  width:50px;height:50px;border-radius:15px;display:flex;align-items:center;justify-content:center;
  background:var(--brand-l);color:var(--brand-d);margin-bottom:16px
}
.card .ico svg{width:25px;height:25px}
.card.accent .ico{background:var(--accent-l);color:var(--accent-d)}

/* ---------- 截图画廊 ---------- */
.shots{
  display:grid;grid-auto-flow:column;grid-auto-columns:230px;gap:22px;
  overflow-x:auto;padding:8px 4px 22px;scroll-snap-type:x mandatory;
  scrollbar-width:thin
}
.shots::-webkit-scrollbar{height:8px}
.shots::-webkit-scrollbar-thumb{background:#CFE6E2;border-radius:8px}
.shot{scroll-snap-align:start;text-align:center}
.shot img{
  border-radius:24px;border:1px solid var(--line);box-shadow:var(--shadow-m);width:100%;height:auto
}
.shot figcaption{margin-top:12px;font-size:14px;color:var(--ink-2);font-weight:600}
.shots-hint{text-align:center;font-size:13px;color:var(--ink-3)}

/* ---------- 深度内容入口 ---------- */
.entry{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow-s);position:relative;overflow:hidden;
  transition:transform .22s,box-shadow .22s
}
.entry:hover{transform:translateY(-5px);box-shadow:var(--shadow-m)}
.entry::before{
  content:"";position:absolute;inset:0 auto 0 0;width:5px;background:var(--grad)
}
.entry.accent::before{background:var(--grad-accent)}
.entry h3{font-size:20px;display:flex;align-items:center;gap:9px}
.entry p{margin:0 0 14px;color:var(--ink-2);font-size:15px}
.entry .more{font-weight:700;font-size:14.5px;color:var(--brand-d);display:inline-flex;gap:6px;align-items:center}
.entry .tag{font-size:12.5px;color:var(--ink-3);display:block;margin-bottom:8px;font-weight:700;letter-spacing:.06em}

/* ---------- 评价 ---------- */
.review{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-s)}
.review .stars{margin-bottom:10px}
.review p{color:var(--ink);font-size:15.5px;margin-bottom:14px}
.review-who{display:flex;align-items:center;gap:11px}
.avatar{
  width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:800;font-size:15px;flex:none;background:var(--grad)
}
.review:nth-child(2n) .avatar{background:var(--grad-accent)}
.review-who b{display:block;font-size:14.5px;line-height:1.35}
.review-who small{color:var(--ink-3);font-size:12.5px}

/* ---------- FAQ ---------- */
.faq-list{max-width:860px;margin:0 auto}
details.qa{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-s);
  margin-bottom:12px;box-shadow:var(--shadow-s);overflow:hidden
}
details.qa summary{
  cursor:pointer;list-style:none;padding:18px 22px;font-weight:700;font-size:16.5px;
  display:flex;align-items:flex-start;gap:12px;color:var(--ink)
}
details.qa summary::-webkit-details-marker{display:none}
details.qa summary::after{
  content:"＋";margin-left:auto;color:var(--brand);font-weight:800;font-size:18px;flex:none;transition:transform .2s
}
details.qa[open] summary::after{content:"－"}
details.qa .a{padding:0 22px 20px 60px;color:var(--ink-2);font-size:15.5px}
details.qa .q-idx{
  flex:none;width:26px;height:26px;border-radius:9px;background:var(--brand-l);color:var(--brand-d);
  font-size:13px;font-weight:800;display:flex;align-items:center;justify-content:center;margin-top:2px
}
.faq-group{margin-bottom:38px}
.faq-group > h2{font-size:23px;display:flex;align-items:center;gap:10px;padding-bottom:12px;border-bottom:2px solid var(--line)}
.faq-group > h2 .dot{width:10px;height:10px;border-radius:50%;background:var(--grad);flex:none}

/* ---------- 底部下载通道 ---------- */
.cta-band{
  background:var(--grad);border-radius:26px;padding:48px 40px;color:#fff;
  display:grid;grid-template-columns:1.05fr .95fr;gap:32px;align-items:center;
  box-shadow:var(--shadow-m);position:relative;overflow:hidden
}
.cta-band::after{
  content:"";position:absolute;right:-70px;top:-70px;width:260px;height:260px;border-radius:50%;
  background:rgba(255,255,255,.14)
}
.cta-band h2{color:#fff;font-size:30px;margin-bottom:.3em}
.cta-band p{color:rgba(255,255,255,.9);margin-bottom:0;font-size:15.5px}
.cta-band .btn-primary{box-shadow:0 12px 26px rgba(0,0,0,.18)}
.cta-side{display:flex;flex-direction:column;gap:14px;align-items:flex-start;position:relative;z-index:2}
.cta-side .small{font-size:13px;color:rgba(255,255,255,.85)}

/* ---------- 页面通用 Hero（内页） ---------- */
.page-hero{
  background:radial-gradient(760px 320px at 82% -20%,#D8F5EE 0%,rgba(216,245,238,0) 65%),#F5FAF9;
  padding:52px 0 40px;border-bottom:1px solid var(--line)
}
.crumb{font-size:13.5px;color:var(--ink-3);margin-bottom:16px}
.crumb a{color:var(--ink-2)}
.crumb a:hover{color:var(--brand-d)}
.page-hero h1{font-size:40px;margin-bottom:.35em}
.page-hero .lead{font-size:17px;color:var(--ink-2);max-width:44em;margin:0}
.chips{display:flex;flex-wrap:wrap;gap:9px;margin-top:20px}
.chips span{
  background:#fff;border:1px solid var(--line);border-radius:999px;padding:.32em .95em;
  font-size:13px;color:var(--ink-2);font-weight:600
}

/* ---------- 正文排版（内页） ---------- */
.prose{max-width:860px;margin:0 auto}
.prose h2{font-size:26px;margin-top:1.7em;scroll-margin-top:96px}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:19.5px;margin-top:1.4em}
.prose p,.prose li{color:#37485A;font-size:16.5px}
.prose strong{color:var(--ink)}
.prose blockquote{
  margin:1.4em 0;padding:18px 24px;background:#fff;border-left:5px solid var(--brand);
  border-radius:0 var(--radius-s) var(--radius-s) 0;box-shadow:var(--shadow-s);color:var(--ink-2)
}
.prose blockquote p:last-child{margin-bottom:0}
.tip{
  background:var(--brand-l);border-radius:var(--radius-s);padding:16px 20px;margin:1.3em 0;
  font-size:15px;color:var(--brand-d);font-weight:600
}
.warn{background:var(--accent-l);color:var(--accent-d)}

/* ---------- 步骤 ---------- */
.steps{counter-reset:s;list-style:none;padding:0;margin:0}
.steps > li{
  counter-increment:s;position:relative;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:24px 26px 24px 78px;margin-bottom:16px;box-shadow:var(--shadow-s)
}
.steps > li::before{
  content:counter(s);position:absolute;left:24px;top:24px;width:38px;height:38px;border-radius:12px;
  background:var(--grad);color:#fff;font-weight:900;font-size:17px;display:flex;align-items:center;justify-content:center
}
.steps > li h3{margin:.1em 0 .4em;font-size:19px}
.steps > li p:last-child{margin-bottom:0;color:var(--ink-2);font-size:15.5px}

/* ---------- 功能深读块 ---------- */
.feature-block{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;
  box-shadow:var(--shadow-s);margin-bottom:22px
}
.feature-block h2{font-size:24px;margin-bottom:.5em;display:flex;align-items:center;gap:12px}
.feature-block h2 .ico{
  width:44px;height:44px;border-radius:13px;background:var(--brand-l);color:var(--brand-d);
  display:flex;align-items:center;justify-content:center;flex:none
}
.feature-block h2 .ico svg{width:22px;height:22px}
.feature-block .fb-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:18px}
.fb-cell{background:var(--bg);border-radius:var(--radius-s);padding:16px 18px}
.fb-cell h4{font-size:14.5px;color:var(--brand-d);margin-bottom:.4em;letter-spacing:.04em}
.fb-cell p{margin:0;font-size:15px;color:var(--ink-2)}

/* ---------- 参数表 ---------- */
.spec{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-s)}
.spec th,.spec td{padding:14px 20px;text-align:left;border-bottom:1px solid var(--line);font-size:15px}
.spec th{background:var(--brand-l);color:var(--brand-d);font-weight:800;width:34%}
.spec tr:last-child th,.spec tr:last-child td{border-bottom:0}

/* ---------- 页脚 ---------- */
.site-footer{background:#16232C;color:#B9C7D2;padding:56px 0 26px;margin-top:0;font-size:14.5px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;margin-bottom:34px}
.site-footer .brand-name{color:#fff}
.footer-about p{color:#93A3B0;margin-top:14px;font-size:13.5px;line-height:1.8}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:14px}
.footer-col a{display:block;color:#9FB0BD;padding:5px 0}
.footer-col a:hover{color:var(--mint)}
.footer-bottom{
  border-top:1px solid #26353F;padding-top:22px;display:flex;flex-wrap:wrap;gap:12px;
  justify-content:space-between;color:#8A9AA7;font-size:13px
}
.disclaimer{color:#7E8E9B;font-size:12.5px;line-height:1.8;margin-top:14px}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:22px;bottom:26px;width:46px;height:46px;border-radius:14px;border:0;
  background:#fff;box-shadow:var(--shadow-m);color:var(--brand-d);cursor:pointer;
  display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;
  transition:opacity .25s,transform .25s;z-index:70
}
.to-top.show{opacity:1;pointer-events:auto}
.to-top:hover{transform:translateY(-3px)}
.to-top svg{width:20px;height:20px}

/* ---------- 渐显（渐进增强） ---------- */
.js .reveal{opacity:0;transform:translateY(16px)}
.js .reveal.in{opacity:1;transform:none;transition:opacity .6s ease,transform .6s ease}

/* ====================== 响应式 ====================== */
@media (max-width:980px){
  .hero{padding:44px 0 52px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero h1{font-size:40px}
  .device-wrap{order:-1}
  .device{width:min(290px,72vw)}
  .section{padding:56px 0}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(3){border-left:0}
  .stat:nth-child(n+3){border-top:1px solid var(--line)}
  .cta-band{grid-template-columns:1fr;padding:36px 28px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .page-hero h1{font-size:32px}
  .feature-block .fb-grid{grid-template-columns:1fr}
  .nav{
    display:none;position:absolute;left:0;right:0;top:72px;background:#fff;
    flex-direction:column;align-items:stretch;padding:12px;gap:6px;border-bottom:1px solid var(--line);
    box-shadow:var(--shadow-m)
  }
  .nav.open{display:flex}
  .nav a{padding:.8em 1em}
  .nav-toggle{display:flex}
  .header-cta{display:none}
}
@media (max-width:620px){
  body{font-size:15.5px}
  .hero h1{font-size:31px}
  .section-head h2{font-size:26px}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr 1fr}
  .stat b{font-size:26px}
  .shots{grid-auto-columns:200px}
  .page-hero h1{font-size:26px}
  .steps > li{padding:20px 20px 20px 66px}
  .steps > li::before{left:18px;top:20px}
  .footer-grid{grid-template-columns:1fr}
  details.qa .a{padding-left:22px}
  .cta-band h2{font-size:23px}
  .prose h2{font-size:22px}
  .wrap{padding:0 16px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .js .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}