/* ============================================================
   ao3appcc — 同人阅读与创作社区专题站
   共用样式。全部资源本地化，无任何外部 CDN。
   ============================================================ */

:root{
  --rose:#A03B3C;
  --rose-deep:#7E2E2F;
  --rose-soft:#F1DCDA;
  --gold:#C8A15A;
  --gold-soft:#F1E2C6;
  --cream:#FBF7EE;
  --paper:#FFFCF5;
  --ink:#2C2522;
  --ink-soft:#5A4D43;
  --muted:#9A8E80;
  --line:#ECE3D2;
  --line-2:#E2D6BF;
  --bg-soft:#F5EFE5;
  --shadow-sm:0 4px 14px rgba(126,46,47,.07);
  --shadow-md:0 14px 36px rgba(126,46,47,.10);
  --shadow-lg:0 28px 60px rgba(126,46,47,.18);
  --radius:14px;
  --radius-lg:22px;
  --radius-xl:32px;
  --maxw:1180px;
  --nav-h:68px;
  --font-sans:-apple-system,"Segoe UI","Microsoft YaHei","PingFang SC","Hiragino Sans GB",sans-serif;
  --font-display:"DengXian","PingFang SC","Microsoft YaHei",sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-sans);
  color:var(--ink);
  background:var(--paper);
  line-height:1.7;
  font-size:16px;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--rose);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--rose-deep)}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--ink);font-weight:700;line-height:1.3;letter-spacing:.01em}
h1{font-size:clamp(28px,4vw,44px)}
h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:14px}
h3{font-size:20px;margin-bottom:10px}
h4{font-size:17px;margin-bottom:8px}
p{margin-bottom:14px;color:var(--ink-soft)}
ul,ol{margin:8px 0 14px 22px;color:var(--ink-soft)}
li{margin-bottom:6px}
hr{border:0;height:1px;background:var(--line);margin:30px 0}

/* ---------- layout ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
section{padding:64px 0}
@media(max-width:780px){section{padding:42px 0}}

/* ---------- nav ---------- */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(255,252,245,.92);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  max-width:var(--maxw);height:var(--nav-h);margin:0 auto;padding:0 22px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
}
.nav-logo{display:flex;align-items:center}
.nav-logo img{height:42px;width:auto;display:block}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  display:inline-flex;align-items:center;
  padding:8px 14px;border-radius:10px;
  color:var(--ink);font-weight:500;
  transition:background .2s ease,color .2s ease;
}
.nav-links a:hover{background:var(--bg-soft);color:var(--rose-deep)}
.nav-links a.is-active{background:var(--rose-soft);color:var(--rose-deep)}
.nav-cta{
  background:linear-gradient(135deg,var(--rose),var(--rose-deep));
  color:#fff !important;padding:9px 18px !important;
  border-radius:999px;font-weight:600;
  box-shadow:0 6px 16px rgba(126,46,47,.28);
  position:relative;overflow:hidden;
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(126,46,47,.36)}
.nav-cta::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 30% 20%,rgba(255,255,255,.45),transparent 55%);
  opacity:0;transition:opacity .3s ease;
}
.nav-cta:hover::after{opacity:1}
.nav-toggle{
  display:none;background:transparent;border:0;
  width:40px;height:40px;border-radius:10px;cursor:pointer;
}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);margin:5px auto}
@media(max-width:880px){
  .nav-links{display:none;flex-direction:column;align-items:stretch;
    position:absolute;top:var(--nav-h);left:0;right:0;
    background:var(--paper);padding:14px 22px;border-bottom:1px solid var(--line);
    box-shadow:var(--shadow-md);
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:10px 14px}
  .nav-toggle{display:block}
}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;
  padding:14px 26px;border-radius:999px;font-weight:600;font-size:15px;
  border:0;cursor:pointer;text-decoration:none;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease;
}
.btn-primary{
  background:linear-gradient(135deg,var(--rose),var(--rose-deep));
  color:#fff;box-shadow:0 8px 22px rgba(126,46,47,.28);
  position:relative;overflow:hidden;
}
.btn-primary::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 30% 20%,rgba(255,255,255,.45),transparent 55%);
  opacity:0;transition:opacity .3s ease;
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(126,46,47,.4);color:#fff}
.btn-primary:hover::after{opacity:1}
.btn-ghost{background:#fff;border:1px solid var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--rose);color:var(--rose-deep);transform:translateY(-1px)}
.btn-lg{padding:16px 32px;font-size:16px}
.btn-sm{padding:10px 18px;font-size:14px}

/* ---------- hero ---------- */
.hero{
  position:relative;
  padding:96px 0 80px;
  background:
    radial-gradient(800px 380px at 80% -20%,rgba(200,161,90,.18),transparent 60%),
    radial-gradient(700px 360px at 0% 20%,rgba(160,59,60,.16),transparent 55%),
    linear-gradient(180deg,#FBF3E6 0%,#FFFCF5 100%);
  overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:
    radial-gradient(circle at 18% 60%,rgba(160,59,60,.06) 0,transparent 60px),
    radial-gradient(circle at 78% 35%,rgba(200,161,90,.07) 0,transparent 80px);
}
.hero-grid{
  position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;
}
@media(max-width:880px){.hero-grid{grid-template-columns:1fr;gap:36px}}
.hero h1 span.hl{
  color:var(--rose-deep);position:relative;
  background:linear-gradient(120deg,var(--rose) 0%,var(--gold) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  padding-right:6px;
}
.hero h1{margin-bottom:18px}
.hero .lead{font-size:17px;max-width:560px;color:var(--ink-soft)}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}
.hero-meta{
  margin-top:36px;display:flex;flex-wrap:wrap;gap:18px 28px;
  color:var(--muted);font-size:14px;
}
.hero-meta b{color:var(--ink);font-weight:600;margin-left:4px}
.hero-visual{
  position:relative;display:flex;justify-content:center;align-items:center;min-height:520px;
}
.phone{
  width:300px;border-radius:42px;background:#fff;box-shadow:var(--shadow-lg);
  border:1px solid var(--line);
  overflow:hidden;
  transform:rotate(2deg);
  transition:transform .4s ease;
}
.phone:hover{transform:rotate(0) translateY(-4px)}
.phone img{width:100%;height:auto;display:block}
.float{
  position:absolute;background:#fff;border-radius:18px;padding:14px 18px;
  box-shadow:var(--shadow-md);display:flex;align-items:center;gap:12px;
  font-size:13px;color:var(--ink);font-weight:500;
}
.float .ic{width:36px;height:36px;border-radius:12px;display:grid;place-items:center;color:#fff}
.float.f1{top:36px;left:0}
.float.f2{bottom:46px;right:0}
.float.f1 .ic{background:var(--rose)}
.float.f2 .ic{background:var(--gold)}

/* ---------- badges ---------- */
.badges{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;
  background:var(--rose-soft);color:var(--rose-deep);font-size:13px;font-weight:500;
}
.badge .dot{width:6px;height:6px;border-radius:50%;background:currentColor;opacity:.7}

/* ---------- sections common ---------- */
.section-head{text-align:center;max-width:680px;margin:0 auto 48px}
.section-head .eyebrow{
  display:inline-block;padding:6px 14px;border-radius:999px;
  background:var(--gold-soft);color:#8c6c2c;font-size:13px;font-weight:600;letter-spacing:.06em;
  margin-bottom:14px;
}
.section-head p{font-size:16px;color:var(--ink-soft);margin-top:6px}

/* ---------- stats strip ---------- */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:40px;
}
@media(max-width:780px){.stats{grid-template-columns:repeat(2,1fr)}}
.stat{
  background:#fff;border-radius:var(--radius);padding:22px 18px;
  border:1px solid var(--line);text-align:center;
  transition:transform .3s ease,box-shadow .3s ease;
}
.stat:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.stat .num{
  font-family:var(--font-display);font-size:30px;font-weight:700;color:var(--rose-deep);
}
.stat .lbl{font-size:13px;color:var(--muted);margin-top:6px;letter-spacing:.04em}

/* ---------- feature cards ---------- */
.features-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:22px;
}
@media(max-width:880px){.features-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.features-grid{grid-template-columns:1fr}}
.fcard{
  background:#fff;border-radius:var(--radius);padding:26px 24px;border:1px solid var(--line);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
  position:relative;
}
.fcard:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:rgba(160,59,60,.3)}
.fcard .ic{
  width:48px;height:48px;border-radius:14px;display:grid;place-items:center;
  background:var(--rose-soft);color:var(--rose-deep);margin-bottom:16px;
  transition:background .3s ease,color .3s ease;
}
.fcard:hover .ic{background:var(--rose);color:#fff}
.fcard h3{font-size:18px;margin-bottom:8px}
.fcard p{font-size:14px;color:var(--ink-soft);margin:0}

/* ---------- screenshots ---------- */
.shots{
  display:grid;grid-template-columns:repeat(4,1fr);gap:18px;
}
@media(max-width:880px){.shots{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.shots{grid-template-columns:1fr}}
.shot{
  background:#fff;border-radius:var(--radius);padding:14px;border:1px solid var(--line);
  text-align:center;transition:transform .3s ease;
}
.shot:hover{transform:translateY(-4px)}
.shot img{width:100%;height:auto;border-radius:10px}
.shot figcaption{margin-top:10px;font-size:13px;color:var(--muted)}

/* ---------- quote ---------- */
.quotes{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
}
@media(max-width:880px){.quotes{grid-template-columns:1fr}}
.quote-card{
  background:#fff;border-radius:var(--radius);padding:24px 26px;border:1px solid var(--line);
  position:relative;
}
.quote-card::before{
  content:"\201C";position:absolute;top:-6px;left:14px;
  font-family:Georgia,serif;font-size:60px;color:var(--gold);opacity:.55;line-height:1;
}
.quote-card blockquote{font-size:15px;color:var(--ink);line-height:1.7;margin:0 0 12px}
.quote-meta{display:flex;align-items:center;gap:10px}
.quote-meta .av{
  width:36px;height:36px;border-radius:50%;display:grid;place-items:center;
  font-family:var(--font-display);font-weight:700;color:#fff;
}
.quote-meta .av.r1{background:var(--rose)}
.quote-meta .av.r2{background:var(--gold)}
.quote-meta .av.r3{background:#5e6f5a}
.quote-meta .who{font-size:13px;color:var(--muted)}
.quote-meta .who b{color:var(--ink);font-weight:600;display:block;font-size:14px}

/* ---------- deep links (inner page entries) ---------- */
.deep-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:22px;
}
@media(max-width:880px){.deep-grid{grid-template-columns:1fr}}
.deep-card{
  background:#fff;border-radius:var(--radius);padding:28px;border:1px solid var(--line);
  position:relative;display:block;color:inherit;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.deep-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:rgba(160,59,60,.3);color:var(--ink)}
.deep-card .badge-t{
  display:inline-block;padding:4px 10px;border-radius:999px;
  background:var(--rose-soft);color:var(--rose-deep);font-size:12px;font-weight:600;letter-spacing:.04em;
  margin-bottom:14px;
}
.deep-card h3{margin-bottom:8px}
.deep-card p{font-size:14px;color:var(--ink-soft);margin-bottom:14px}
.deep-card .more{
  display:inline-flex;align-items:center;gap:6px;color:var(--rose);font-weight:600;
}
.deep-card:hover .more{color:var(--rose-deep)}

/* ---------- FAQ preview ---------- */
.faq-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
@media(max-width:880px){.faq-list{grid-template-columns:1fr}}
.faq-item{
  background:#fff;border-radius:var(--radius);border:1px solid var(--line);
  overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item.open{border-color:var(--rose);box-shadow:var(--shadow-sm)}
.faq-q{
  width:100%;text-align:left;background:transparent;border:0;padding:18px 22px;
  display:flex;justify-content:space-between;align-items:center;gap:14px;
  font-size:15px;color:var(--ink);font-weight:600;cursor:pointer;
  font-family:inherit;
}
.faq-q .plus{font-size:22px;color:var(--rose);transition:transform .25s ease;display:inline-block}
.faq-item.open .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a-inner{padding:0 22px 20px;color:var(--ink-soft);font-size:14.5px;line-height:1.8}
.faq-item.open .faq-a{max-height:600px}

/* ---------- bottom CTA band ---------- */
.cta-band{
  background:
    radial-gradient(400px 200px at 80% 30%,rgba(200,161,90,.18),transparent 70%),
    linear-gradient(135deg,var(--rose) 0%,var(--rose-deep) 100%);
  color:#fff;border-radius:var(--radius-xl);padding:50px 56px;position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(transparent 0,transparent 100%);
  background:
    radial-gradient(circle at 20% 80%,rgba(255,255,255,.06),transparent 40%),
    radial-gradient(circle at 90% 10%,rgba(255,255,255,.08),transparent 50%);
}
.cta-band-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:32px;align-items:center;position:relative}
@media(max-width:780px){.cta-band{padding:38px 30px}.cta-band-grid{grid-template-columns:1fr}}
.cta-band h2{color:#fff;margin-bottom:10px}
.cta-band p{color:rgba(255,255,255,.86);margin-bottom:0}
.cta-band .btn{background:#fff;color:var(--rose-deep);font-weight:700;box-shadow:none;justify-self:end}
.cta-band .btn:hover{background:var(--gold-soft);color:var(--rose-deep)}

/* ---------- footer ---------- */
.footer{
  background:linear-gradient(180deg,var(--cream) 0%,#F5EEE2 100%);
  padding:60px 0 30px;border-top:1px solid var(--line);margin-top:30px;
}
.footer-grid{
  max-width:var(--maxw);margin:0 auto;padding:0 22px;
  display:grid;grid-template-columns:1.4fr .8fr .8fr .8fr;gap:36px;
}
@media(max-width:880px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.footer-grid{grid-template-columns:1fr}}
.footer .brand img{height:38px;margin-bottom:14px}
.footer .brand p{font-size:14px;color:var(--ink-soft);max-width:340px}
.footer h4{font-size:14px;color:var(--ink);margin-bottom:14px;font-weight:600;letter-spacing:.04em}
.footer ul{list-style:none;margin:0;padding:0}
.footer li{margin-bottom:6px}
.footer li a{color:var(--ink-soft);font-size:14px}
.footer li a:hover{color:var(--rose)}
.footer-bottom{
  max-width:var(--maxw);margin:36px auto 0;padding:18px 22px 0;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;
  color:var(--muted);font-size:13px;
}
.disclaimer{
  max-width:var(--maxw);margin:14px auto 0;padding:0 22px;
  color:var(--muted);font-size:12.5px;line-height:1.7;
}

/* ---------- inner page hero (page-head) ---------- */
.page-head{
  background:
    radial-gradient(600px 300px at 80% 0%,rgba(200,161,90,.16),transparent 60%),
    linear-gradient(180deg,#FAF1E2 0%,var(--paper) 100%);
  padding:64px 0 30px;
}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:12px}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--rose)}
.page-head h1{margin-bottom:10px}
.page-head .lead{font-size:16.5px;color:var(--ink-soft);max-width:760px;margin:0}
.page-meta{margin-top:18px;display:flex;gap:18px;flex-wrap:wrap;color:var(--muted);font-size:13px}
.page-meta b{color:var(--ink);font-weight:600;margin-left:4px}

/* ---------- article (inner pages) ---------- */
.article{max-width:860px;margin:0 auto;padding:30px 22px 0}
.article p{font-size:16px;color:var(--ink);line-height:1.85;margin-bottom:18px}
.article h2{margin-top:46px;font-size:24px;color:var(--ink);position:relative;padding-left:14px}
.article h2::before{
  content:"";position:absolute;left:0;top:8px;width:5px;height:24px;
  background:linear-gradient(180deg,var(--rose),var(--rose-deep));border-radius:3px;
}
.article h3{margin-top:30px;font-size:18px;color:var(--ink)}
.article ol,.article ul{margin:8px 0 18px 22px;color:var(--ink)}
.article li{margin-bottom:8px;line-height:1.8}
.article blockquote{
  border-left:4px solid var(--rose);
  background:var(--rose-soft);padding:14px 18px;border-radius:0 12px 12px 0;
  color:var(--ink);margin:18px 0;
}
.article blockquote p:last-child{margin-bottom:0}
.callout{
  background:var(--bg-soft);border:1px dashed var(--line-2);border-radius:var(--radius);
  padding:16px 20px;margin:18px 0;color:var(--ink-soft);
}
.callout b{color:var(--rose-deep)}
.step-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:24px 0;
}
@media(max-width:780px){.step-grid{grid-template-columns:1fr}}
.step{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;
  position:relative;
}
.step .num{
  width:30px;height:30px;border-radius:50%;background:var(--rose);color:#fff;
  display:grid;place-items:center;font-weight:700;font-size:14px;margin-bottom:10px;
}
.step h4{font-size:15px;margin-bottom:6px}
.step p{font-size:14px;color:var(--ink-soft);margin:0}

.kbd{
  display:inline-block;padding:1px 8px;border-radius:6px;
  background:var(--bg-soft);border:1px solid var(--line-2);
  font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:13px;color:var(--ink);
}
.rel-links{
  margin-top:40px;background:var(--bg-soft);border-radius:var(--radius);padding:22px 26px;
}
.rel-links h4{margin-bottom:12px}
.rel-links ul{margin-left:18px;margin-bottom:0}

/* ---------- reveal animation ---------- */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- back-to-top ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;
  background:#fff;border:1px solid var(--line);color:var(--rose);cursor:pointer;
  display:none;align-items:center;justify-content:center;
  box-shadow:var(--shadow-md);transition:opacity .25s ease,transform .25s ease;
}
.to-top.show{display:flex}
.to-top:hover{transform:translateY(-3px);background:var(--rose);color:#fff}