/* Feelin — 柔光书信 / 陪伴信笺（独立模板） */
:root{
  --rose:#e11d48;--rose-deep:#9f1239;--mist:#fff1f2;--paper:#fffaf8;--ink:#3b1d27;
  --muted:#8a6570;--line:#f3c5cf;--gold:#c4a484;--float-h:76px;
  --safe:env(safe-area-inset-bottom,0px);
  --display:"Songti SC","STSong","SimSun","PingFang SC",serif;
  --body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--body);color:var(--ink);line-height:1.7;
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%,rgba(251,113,133,.35),transparent),
    radial-gradient(ellipse 60% 40% at 90% 10%,rgba(253,164,175,.28),transparent),
    linear-gradient(180deg,#fff5f6 0%,var(--mist) 40%,#fffafb 100%);
  padding-bottom:calc(var(--float-h) + var(--safe) + 20px);
}
img{max-width:100%;display:block;height:auto}a{color:var(--rose);text-decoration:none}
.fl-wrap{width:min(720px,calc(100% - 28px));margin:0 auto}
.fl-wide{width:min(980px,calc(100% - 28px));margin:0 auto}

/* 顶部居中信笺抬头 */
.site-header{position:sticky;top:0;z-index:40;backdrop-filter:blur(10px);background:rgba(255,241,242,.88);border-bottom:1px solid rgba(243,197,207,.7)}
.nav{display:flex;flex-direction:column;align-items:center;padding:14px 0 10px;gap:10px;position:relative}
.brand{display:flex;flex-direction:column;align-items:center;gap:6px;color:var(--ink);text-decoration:none}
.brand img{width:52px;height:52px;border-radius:50%;box-shadow:0 8px 24px rgba(190,18,60,.25);border:3px solid #fff}
.brand span{font-family:var(--display);font-size:1.35rem;letter-spacing:.12em}
.brand small{font-size:.72rem;color:var(--muted);letter-spacing:.2em;text-transform:uppercase}
.nav-toggle{position:absolute;right:0;top:18px;width:42px;height:42px;border:1px solid var(--line);border-radius:50%;background:#fff;cursor:pointer}
.nav-toggle-bars,.nav-toggle-bars::before,.nav-toggle-bars::after{display:block;width:16px;height:2px;background:var(--rose-deep);border-radius:2px;position:relative;margin:0 auto}
.nav-toggle-bars::before,.nav-toggle-bars::after{content:"";position:absolute;left:0}
.nav-toggle-bars::before{top:-5px}.nav-toggle-bars::after{top:5px}
.nav-open .nav-toggle-bars{background:transparent}
.nav-open .nav-toggle-bars::before{top:0;transform:rotate(45deg)}
.nav-open .nav-toggle-bars::after{top:0;transform:rotate(-45deg)}
.nav-links{display:none;width:100%;flex-direction:column;gap:4px;padding:8px;background:#fff;border:1px solid var(--line);border-radius:18px}
.nav-open .nav-links{display:flex}
.nav-links a{padding:12px;text-align:center;border-radius:12px;color:var(--muted);text-decoration:none}
.nav-links a.active,.nav-links a:hover{background:var(--mist);color:var(--rose-deep)}
@media(min-width:768px){
  .nav-toggle{display:none}
  .nav-links,.nav-open .nav-links{display:flex;flex-direction:row;justify-content:center;gap:4px;padding:0;background:transparent;border:none}
  .nav-links a{padding:6px 14px;font-size:.88rem;border-radius:999px}
}

/* Hero：信笺开篇 */
.fl-hero{padding:36px 0 20px;text-align:center}
.fl-seal{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border:1px dashed var(--gold);border-radius:999px;color:var(--gold);font-size:.78rem;letter-spacing:.08em;margin-bottom:18px}
.fl-hero h1{font-family:var(--display);font-size:clamp(2rem,7vw,2.8rem);margin:0 0 12px;font-weight:700;line-height:1.25}
.fl-hero .lead{color:var(--muted);margin:0 auto 22px;max-width:34em;font-size:1.02rem}
.fl-ornament{width:64px;height:2px;margin:0 auto 22px;background:linear-gradient(90deg,transparent,var(--rose),transparent)}
.cta-row{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-bottom:10px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 22px;border-radius:999px;font-weight:700;font-size:1rem;text-decoration:none!important;border:none;cursor:pointer;font-family:inherit;transition:transform .2s,box-shadow .2s}
.btn:active{transform:scale(.98)}
.btn-android{background:linear-gradient(135deg,#fb7185,var(--rose-deep));color:#fff;box-shadow:0 12px 28px rgba(225,29,72,.3)}
.btn-ios{background:#3b1d27;color:#fff}
.btn-ghost{background:#fff;color:var(--rose-deep);border:1px solid var(--line)}
.fl-meta{display:flex;flex-wrap:wrap;justify-content:center;gap:10px 18px;color:var(--muted);font-size:.86rem;margin-top:16px}
.fl-letter{
  margin:28px auto;padding:28px 22px;background:var(--paper);
  border:1px solid var(--line);border-radius:4px 24px 4px 24px;
  box-shadow:0 20px 50px rgba(159,18,57,.08);position:relative;
}
.fl-letter::before{content:"";position:absolute;top:0;left:18px;right:18px;height:3px;background:linear-gradient(90deg,var(--rose),transparent)}
.fl-letter h2{font-family:var(--display);margin:0 0 12px;font-size:1.45rem}
.fl-letter p,.fl-letter li{color:var(--muted)}
.fl-letter ul{padding-left:1.2em}

.fl-section{padding:32px 0}
.fl-section h2{font-family:var(--display);text-align:center;margin:0 0 8px;font-size:clamp(1.4rem,4vw,1.75rem)}
.fl-section .sub{text-align:center;color:var(--muted);margin:0 0 22px}
.fl-feel-grid{display:grid;gap:14px}
.fl-feel{
  display:grid;grid-template-columns:56px 1fr;gap:14px;padding:18px;
  background:rgba(255,255,255,.75);border-radius:20px;border:1px solid rgba(243,197,207,.8);
}
.fl-feel em{font-style:normal;font-family:var(--display);font-size:1.4rem;color:var(--rose);display:grid;place-items:center}
.fl-feel h3{margin:0 0 4px;font-size:1.05rem}.fl-feel p{margin:0;color:var(--muted);font-size:.92rem}

/* 宝丽来截图 */
.fl-polaroids{display:grid;grid-template-columns:1fr 1fr;gap:16px;padding:8px 0}
.fl-polaroid{background:#fff;padding:10px 10px 14px;border-radius:4px;box-shadow:0 12px 30px rgba(59,29,39,.12);transform:rotate(-1.5deg);transition:transform .25s}
.fl-polaroid:nth-child(even){transform:rotate(1.8deg)}
.fl-polaroid:hover{transform:rotate(0) translateY(-4px)}
.fl-polaroid img{width:100%;aspect-ratio:9/16;object-fit:cover;background:var(--mist)}
.fl-polaroid figcaption{text-align:center;margin-top:8px;font-size:.84rem;color:var(--muted);font-family:var(--display)}

.fl-steps{display:grid;gap:12px;counter-reset:s}
.fl-step{counter-increment:s;display:grid;grid-template-columns:40px 1fr;gap:12px;padding:16px;background:rgba(255,255,255,.8);border-radius:18px;border:1px dashed var(--line)}
.fl-step::before{content:counter(s);width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:var(--rose);color:#fff;font-family:var(--display)}
.fl-step h3{margin:0 0 4px}.fl-step p{margin:0;color:var(--muted);font-size:.92rem}

.fl-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:8px}
.fl-tags a{padding:8px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--ink);font-size:.86rem;text-decoration:none}
.fl-tags a:hover{border-color:var(--rose);color:var(--rose-deep);background:var(--mist)}

.faq details{background:rgba(255,255,255,.85);border:1px solid var(--line);border-radius:16px;padding:12px 16px;margin-bottom:10px}
.faq summary{cursor:pointer;font-weight:700}.faq details p{margin:10px 0 0;color:var(--muted);font-size:.92rem}
.notice{margin-top:16px;padding:14px;border-radius:16px;background:#fff7ed;border:1px solid #fed7aa;color:#9a3412;font-size:.9rem}

.site-footer{margin-top:24px;padding:28px 0 18px;border-top:1px solid var(--line)}
.disclaimer{padding:14px;border-radius:16px;background:#fff1f2;border:2px solid #fb7185;color:#9f1239;font-weight:700;text-align:center;margin-bottom:14px}
.stats-line{text-align:center;margin-bottom:12px;font-size:.95rem}
.footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 14px;margin-bottom:10px}
.footer-links a{color:var(--muted);font-size:.84rem}
.copyright{text-align:center;color:var(--muted);font-size:.8rem}

.float-bar{position:fixed;left:0;right:0;bottom:0;z-index:100;transform:translateY(110%);transition:transform .3s ease;padding:10px 12px calc(10px + var(--safe));background:rgba(255,250,248,.95);backdrop-filter:blur(12px);border-top:1px solid var(--line);box-shadow:0 -10px 30px rgba(159,18,57,.1)}
.float-bar.show{transform:translateY(0)}
.float-inner{width:min(420px,100%);margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:10px}
.float-bar .btn{min-height:46px;border-radius:999px}

.breadcrumb{padding:16px 0 0;font-size:.86rem;color:var(--muted)}
.fl-sub-hero{padding:24px 0 8px;text-align:center}
.fl-sub-hero h1{font-family:var(--display);font-size:clamp(1.6rem,5vw,2.2rem);margin:0 0 10px}
.content-block{background:var(--paper);border:1px solid var(--line);border-radius:4px 20px;padding:22px;margin:16px 0}
.content-block h2{font-family:var(--display);margin-top:0}
.related-box{margin-top:16px;padding-top:14px;border-top:1px dashed var(--line)}

@media(min-width:768px){
  .fl-feel-grid{grid-template-columns:1fr 1fr}
  .fl-polaroids{grid-template-columns:repeat(4,1fr)}
  .fl-steps{grid-template-columns:repeat(3,1fr)}
}